Hot bed junction box and 3D printing equipment

Abstract

The utility model provides a hot bed junction box and 3D printing equipment, the hot bed junction box is connected to a wiring part of a hot bed, and the wiring part is arranged on one side of the hot bed in a protruding mode in the moving direction of the hot bed; the hot bed junction box comprises a box body and a wire piece, and the box body wraps the outer side of the wiring part; one end of a wire of the hot bed is connected to the wiring part, the other end of the wire of the hot bed penetrates out of the wire groove, a first included angle is formed between the extending direction of the wire groove and the moving direction of the hot bed, and at least part of the inner circumferential wall of the wire groove abuts against the wire and is used for adjusting the arrangement direction of the wire; and the bending angle of one end of the wire rod penetrating out of the wiring trough relative to the hot bed is increased. Therefore, when the leading-out end of the wire rod is bent, the length of the wire rod in which the leading-out end participates is larger, the wire rod is prevented from being greatly bent with a smaller length, and the service life of the wire rod is prolonged.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a hot bed junction box and a 3D printing device. Background Art

[0002] When the 3D printing equipment is printing a workpiece, the hot bed will move back and forth to adjust the position of the workpiece relative to the nozzle. The hot bed is usually heated by an external power supply through a wire. In order to minimize the space occupied by the wire, the wire is usually bent and laid. When the hot bed moves back and forth, the wire moves with it, causing the bends of the wire to be bent repeatedly, greatly reducing the service life of the wire. Utility Model Content

[0003] The present application provides a hot bed junction box and a 3D printing device to solve the problem of low service life of wires in the hot bed junction box in the known technology.

[0004] In a first aspect, the present application provides a hot bed junction box, which is connected to a junction part of the hot bed, and the junction part is protruding on one side of the hot bed along the movement direction of the hot bed; the hot bed junction box includes a box body and a wire member, and the box body is wrapped around the outer side of the junction part; the wire member is connected to the box body and is provided with a wire groove, one end of the wire of the hot bed is connected to the junction part, and the other end thereof passes through the wire groove, the extension direction of the wire groove is set at a first angle with the movement direction of the hot bed, and the inner peripheral wall of the wire groove at least partially supports the wire, which is used to adjust the laying direction of the wire to increase the bending angle of one end of the wire passing through the wire groove relative to the hot bed.

[0005] In a possible implementation manner, the first angle ranges from 30° to 50°.

[0006] In a possible implementation manner, one end of the wire member is connected to a side of the box body away from the heated bed, and the other end of the wire member is inclined outwardly in a direction away from the heated bed.

[0007] In a possible implementation, a first inclined surface is provided on a side of the box body away from the hot bed, the first inclined surface is inclined outward from an end away from the box body toward an end close to the box body, one end of the wire member is connected to the first inclined surface, and an extension direction of the wire groove is perpendicular to the first inclined surface.

[0008] In a possible implementation, a cavity is opened inside the box body, the wire groove is connected to the cavity, one end of the wire is located in the cavity and electrically connected to the wiring portion, and the other end thereof passes through the wire groove.

[0009] In a possible implementation manner, a mounting opening is provided on a side of the box body away from the hot bed;

[0010] The wire guide includes a first section, a second section and a third section connected in sequence, the outer diameter of the second section is smaller than the outer diameters of the first section and the third section, and the second section is clamped in the installation opening.

[0011] In a possible implementation, the box body includes an upper shell and a lower shell, the upper shell and the lower shell are disposed on opposite sides of the wiring portion and surround the cavity, and the upper shell and the lower shell are both connected to the wiring portion.

[0012] In a possible embodiment, the upper shell is provided with a first connecting hole, the wiring portion is provided with a second connecting hole, and the lower shell is provided with a third connecting hole. The first connecting hole, the second connecting hole, and the third connecting hole are correspondingly arranged and are all for fasteners to pass through; the number of the first connecting hole, the second connecting hole, and the third connecting hole is set to three.

[0013] In a possible implementation manner, the connection portion is provided with slots on opposite sides along a first direction, and the first direction is perpendicular to the movement direction of the hot bed;

[0014] An opening is formed at one end of the box body close to the hot bed, the opening is connected to the cavity, the wiring part passes through the opening, and two opposite inner walls of the opening along the first direction are both provided with clamping protrusions, and the clamping protrusions are clamped in the clamping groove.

[0015] In a second aspect, an embodiment of the present application further provides a 3D printing device, including a machine platform, a motion mechanism, a hot bed and the above-mentioned hot bed junction box, wherein the motion mechanism is installed on the machine platform, and the motion mechanism is transmission-connected to the hot bed to drive the hot bed to move.

[0016] In a possible implementation, the 3D printing device further includes a power supply, the power supply is located on one side of the hot bed along the first direction, and one end of the wire passing through the wire groove is connected to the power supply.

[0017] The hot bed junction box of the present application changes the orientation of the lead-out ends of the wires by means of the conductors, so that the bending angle of the lead-out ends of the wires relative to the hot bed becomes larger. During the movement of the hot bed, the lead-out ends of the wires participate in a larger length of the wire section when bending, thereby avoiding stress concentration when the wires are greatly bent at a smaller length, thereby increasing the service life of the wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a 3D printing device in one embodiment of the present application.

[0019] Figure 2 for Figure 1A wiring diagram of a hot bed of a 3D printing device in one embodiment.

[0020] Figure 3 for Figure 1 A schematic structural diagram of a wiring portion of a 3D printing device in one embodiment.

[0021] Figure 4 It is a three-dimensional schematic diagram of a hot bed junction box of the present application in one embodiment.

[0022] Figure 5 This is a schematic diagram of the separation of the hot bed junction box and the wiring part in one embodiment of the present application.

[0023] Figure 6 for Figure 5 A schematic cross-sectional view of the hot bed junction box along the VI-VI direction.

[0024] Figure 7 It is a schematic diagram of an explosion of a hot bed junction box in one embodiment of the present application.

[0025] Figure 8 An exploded schematic diagram of the hot bed junction box of the present application from another perspective in one embodiment.

[0026] Description of main component symbols:

[0027] 3D printing equipment 200 machine 210 motion mechanism 220 hot bed 230 connection part 231 card slot 2310

[0028] Second connection hole 2311 Through hole 2312 Connecting electric contact 232 Bracket 240 Nozzle assembly 250 Wire 260 Power supply 270 Hot bed Junction box 100 Box body 10 First section 101 Second section 102 Cavity 103 Opening 104 Clamping protrusion 1041 Installation port 105 Upper shell 11

[0029] First cavity 110 first connection hole 111

[0030] The first half 112 lower shell 12

[0031] The second cavity 120

[0032] Connecting column 121

[0033] The third connecting hole 122

[0034] The second half 123

[0035] Wire guide 20

[0036] Wire duct 201

[0037] First section 21

[0038] Second section 22

[0039] Section 3 23

[0040] Fastener 30

[0041] First direction X

[0042] Hot bed movement direction Y

[0043] The second direction Z

[0044] The first angle R

[0045] Mounting surface W

[0046] The first slope P

[0047] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0048] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0049] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0051] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0052] like Figure 1As shown, this embodiment provides a 3D printing device 200, including a machine table 210, a motion mechanism 220, a hot bed 230 and a hot bed junction box 100. The machine table 210 is generally a square structure, and is used to be placed on the ground or a table. The end surface of the top of the machine table 210 is arranged in the horizontal direction, and the motion mechanism 220 is installed on the end surface of the top of the machine table 210. The motion mechanism 220 is a linear reciprocating mechanism such as a screw slide or a cylinder slide, and is connected to the hot bed 230 in a transmission manner, and is used to drive the hot bed 230 to reciprocate back and forth in one direction.

[0053] Please combine again Figure 1 In one embodiment, the 3D printing device 200 further includes a bracket 240 and a nozzle assembly 250. The bracket 240 is fixed to the machine table 210, and the nozzle assembly 250 is located above the hot bed 230 and is slidably mounted on the bracket 240 along a first direction X, so that the nozzle assembly 250 can slide relative to the hot bed 230 along the first direction X. The first direction X is perpendicular to the hot bed movement direction Y, and is located in the same horizontal plane as the hot bed movement direction Y.

[0054] It can be understood that, in some embodiments, the nozzle assembly 250 can also be slidably mounted on the bracket 240 along the second direction Z, and the second direction Z is perpendicular to the first direction X and the horizontal plane where the hot bed movement direction Y is located, so that the nozzle assembly 250 can be close to or away from the hot bed 230 along the second direction Z, thereby adjusting the height of the nozzle assembly 250 relative to the hot bed 230.

[0055] Please combine again Figures 1 to 3 In one embodiment, the 3D printing device 200 further includes a power supply 270. The heated bed 230 has a heating module (not shown), which is used to heat the heated bed 230. The power supply 270 is connected to the heating module via a wire 260 to supply power to the heating module.

[0056] Along the moving direction Y of the hot bed, the surface on the front side of the hot bed 230 is set as a mounting surface W, and a wiring portion 231 is convexly provided on the mounting surface W. The wiring portion 231 is connected to the hot bed 230, or is integrally formed with the hot bed 230. An electric contact 232 is provided at the bottom end of the wiring portion 231. The electric contact 232 is electrically connected to the heating module through a wire. After the wire 260 is electrically connected to the electric contact 232, a current channel is formed with the heating module.

[0057] The power supply 270 is located at one side of the heating bed 230 along the first direction X, and is installed on the machine table 210. The power supply 270 is installed on the left or right side of the heating bed 230, rather than on the front or rear side of the heating bed 230 along its movement direction, in order to avoid the need to leave enough space between the power supply 270 and the heating bed 230 for the movement of the heating bed 230, resulting in too much space occupied by the power supply 270 and the heating bed 230, and too long required length of the wire 260.

[0058] It is worth noting that the wiring portion 231 is located on the left or right side of the mounting surface W along the first direction X, that is, on one side of the corner of the heating bed 230. The power supply 270 is located on the other side of the corner of the heating bed 230, thereby reducing the required length of the wire 260 and the wiring space.

[0059] like Figure 4 As shown, combined with Figures 1 to 3 , this embodiment provides a hot bed junction box 100. The hot bed junction box 100 is connected to the connection part 231 of the hot bed 230. The hot bed junction box 100 includes a box body 10 and a wire member 20. The box body 10 is wrapped around the outside of the connection part 231 to protect the connection part 231 and avoid accidents such as leakage. The wire member 20 is connected to the box body 10, and the wire member 20 and the box body 10 are detachably connected or integrally formed.

[0060] Along the extension direction of the wire member 20, the wire member 20 is provided with a wire groove 201. The wire groove 201 is provided at the center of the wire member 20 and passes through the two opposite ends of the wire member 20. One end of the wire 260 is fixed to the wiring portion 231 and electrically connected to the power contact 232 of the wiring portion 231, and the other end thereof passes through the wire groove 201, and then passes through the wire member 20 and is connected to the power source 270.

[0061] The extension direction of the wire trough 201 is set at a first angle R with the direction Y of movement of the hot bed, and the inner diameter of the wire trough 201 is adapted to the outer diameter of the wire 260, ensuring that the inner peripheral wall of the wire trough 201 at least partially abuts against the wire 260, so that the section passing through the wire trough 201 is bent, thereby adjusting the layout direction of the lead-out end of the wire 260 passing through the wire trough 201. Compared with the layout method of the wire 260 in which the lead-out end of the wire 260 is parallel to the direction Y of movement of the hot bed, this layout method of the wire 260 can increase the bending angle of the lead-out end of the wire 260 relative to the hot bed 230.

[0062] In this way, during the movement of the hot bed 230, the lead-out end of the wire 260 participates in a longer length of the wire 260 section when bending, thereby avoiding stress concentration and easy breakage of the wire 260 when the wire 260 is bent sharply at a smaller length, thereby increasing the service life of the wire 260.

[0063] Please combine again Figures 2 to 4 In one embodiment, one end of the wire guide 20 is connected to a side of the box body 10 away from the hot bed 230 , and the other end of the wire guide 20 is inclined outwardly in a direction away from the hot bed 230 .

[0064] Specifically, the box body 10 includes an integrally formed first section 101 and a second section 102 . The first section 101 is substantially square in shape, and one end is connected to the mounting surface W. The second section 102 is substantially triangular in shape, and one side thereof is connected to the other end of the first section 101 .

[0065] It is understandable that the shape of the first section 101 may also be a trapezoid or other shapes. The shape of the second section 102 may also be a semicircle or other shapes. In this embodiment, the shapes of the first section 101 and the second section 102 are not specifically limited.

[0066] Along the first direction X, the surface of the second section 102 on one side close to the power source 270 is set as a first inclined surface P. The first inclined surface P is inclined outward from an end thereof away from the heating bed 230 toward an end thereof close to the heating bed 230, one end of the wire member 20 is connected to the first inclined surface P, and the extension direction of the wire groove 201 is perpendicular to the first inclined surface P, so that the extension direction of the wire groove 201 and the movement direction Y of the heating bed form the above-mentioned first angle R.

[0067] In particular, the first angle R is in the range of 30° to 50°, and preferably 40°. When the first angle R is too large, the required length of the wire 260 will be too large, and the wire 260 will occupy too much space when laid out. When the first angle R is too small, the length of the wire 260 section in which the lead-out end of the wire 260 participates in bending is still too small, and the wire 260 still has a greater risk of breaking.

[0068] In addition, the wire 260 is bent in a natural state and is substantially in a curve shape.

[0069] Please combine again Figures 2 to 6 In one embodiment, a cavity 103 is formed inside the box body 10, and the wiring portion 231 is received in the cavity 103. The wire groove 201 is connected to the cavity 103, and one end of the wire 260 is located in the cavity 103, and the other end thereof passes through the cavity 103 and the wire groove 201 in sequence.

[0070] Furthermore, a mounting opening 105 is provided on one side of the box body 10 away from the hot bed 230. The mounting opening 105 is located on the first inclined surface P and communicates with the cavity 103. The middle section of the wire guide 20 is clamped in the mounting opening 105 to fix the wire guide 20 to the box body 10, and one end of the wire guide 20 extends into the cavity 103 through the mounting opening 105, and the other end is located outside the box body 10 to prevent the end of the wire 260 connected to the connecting portion from being exposed.

[0071] The wire guide 20 is made of soft rubber material to prevent the wire 260 from being damaged by friction when the wire 260 contacts the wire guide 20. The wire guide 20 includes a first section 21, a second section 22, and a third section 23 connected in sequence. The first section 21, the second section 22, and the third section 23 are coaxially arranged and integrally connected. Along the extension direction of the first section 21, the second section 22 protrudes outward from the end surface of one end of the first section 21, and the third section 23 protrudes outward from the end surface of the second section 22 away from the first section 21.

[0072] The first section 21 is located in the cavity 103, and the third section 23 is located outside the cavity 103. The outer diameter of the second section 22 is smaller than the outer diameters of the first section 21 and the third section 23, so that a necking structure is formed at the second section 22, thereby clamping the second section 22 in the installation opening 105.

[0073] When the second section 22 is clamped in the installation opening 105, the inner circumference of the installation opening 105 abuts against the outer circumference of the second section 22, and one end of the first section 21 close to the second section 22 abuts against the inner wall of the box body 10, thereby improving the stability of the connection between the wire guide 20 and the box body 10. Alternatively, one end of the third section 23 close to the second section 22 abuts against the outer wall of the box body 10.

[0074] In particular, the cross-section of the second section 22 is roughly elliptical, so that the second section 22 is roughly a flat structure, and the shape of the mounting opening 105 is adapted to the shape of the second section 22 to prevent the second section 22 from rotating when it is clamped in the mounting opening 105, thereby preventing the wire 260 from twisting when the wire guide 20 rotates.

[0075] Please combine again Figures 5 to 8 In one embodiment, the box body 10 includes an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 have the same shape. The shapes of the upper shell 11 and the lower shell 12 are the same as those described above for the box body 10, and are not described again. The upper shell 11 and the lower shell 12 are disposed on opposite sides of the wiring portion 231 along the second direction Z, and are surrounded to form a cavity 103.

[0076] The upper shell 11 has a first cavity 110 at one end close to the connection portion 231 for accommodating the connection portion 231. The lower shell 12 has a second cavity 120 at one end close to the connection portion 231. The second cavity 120 is connected to the first cavity 110 and together form the cavity 103.

[0077] In addition, the side wall of the upper shell 11 corresponding to the first inclined surface P is provided with a first half opening 112, and the side wall of the lower shell 12 corresponding to the first inclined surface P is provided with a second half opening 123. The first half opening 112 and the second half opening 123 are both semicircular, and the first half opening 112 and the second half opening 123 are connected to form the above-mentioned installation opening 105.

[0078] Please combine again Figures 5 to 8 In one embodiment, the upper shell 11 and the lower shell 12 are both connected to the wiring portion 231 .

[0079] Specifically, the upper shell 11 is provided with a first connection hole 111, and the first connection hole 111 penetrates the upper shell 11 along the second direction Z. The wiring portion 231 is provided with a second connection hole 2311, and the second connection hole 2311 penetrates the wiring portion 231 along the second direction Z. A connection column 121 is protruded from the bottom wall of the second cavity 120 toward the upper shell 11, and the connection column 121 is provided with a third connection hole 122. The first connection hole 111, the second connection hole 2311, and the third connection hole 122 are correspondingly arranged, and all are for fasteners 30 to pass through. The fastener 30 is a screw or a bolt, etc., and one end of the fastener 30 passes through the first connection hole 111, the second connection hole 2311, and the third connection hole 122 from the upper side of the upper shell 11 in sequence, so as to fix the upper shell 11, the wiring portion 231, and the lower shell 12 to each other.

[0080] In particular, the number of the first connection holes 111, the second connection holes 2311, and the third connection holes 122 are all set to three. The three first connection holes 111 are distributed in a triangle, which can improve the stability of the connection between the upper shell 11, the wiring portion 231 and the lower shell 12 compared to using two first connection holes 111.

[0081] It is understandable that the number of the first connection hole 111 , the second connection hole 2311 , and the third connection hole 122 may also be set to four or five, or a number greater than two.

[0082] Please combine again Figure 8 , and see Figures 2 to 3 In one embodiment, the wiring portion 231 is provided with a through hole 2312, and the through hole 2312 penetrates the wiring portion 231 along the second direction Z. The ground wire of the wire 260 is led out from the electrical contact 232 disposed at the bottom end of the wiring portion 231, and then passes through the through hole 2312 to abut against the upper shell 11, thereby grounding the ground wire and preventing the ground wire from being exposed to the box body 10.

[0083] Please combine again Figure 7 and Figure 8 , and see Figure 3 In one embodiment, the connection portion 231 is provided with a slot 2310 on opposite sides along the first direction X. The slot 2310 is recessed inward from the side wall of the connection portion 231 and is located at one end of the side wall of the connection portion 231 close to the hot bed 230 .

[0084] An opening 104 is provided at one end of the upper shell 11 close to the heat bed 230, and two opposite inner walls of the first cavity 110 along the first direction X are provided with a clamping protrusion 1041, and the clamping protrusion 1041 is located at one end of the upper shell 11 close to the heat bed 230. The clamping protrusion 1041 is clamped in the clamping groove 2310, and along the heat bed movement direction Y, one side of the clamping protrusion 1041 abuts against the mounting surface W, and the other side thereof abuts against the groove wall of the clamping groove 2310, so as to clamp the clamping protrusion 1041 between the heat bed 230 and the wiring portion 231. In addition, the two opposite inner walls of the opening 104 along the first direction X respectively abut against the opposite two side walls of the wiring portion 231 along the first direction X, so that the upper shell 11 completely covers the wiring portion 231.

[0085] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A hot bed junction box connected to a connection portion of the hot bed, wherein the connection portion is protrudingly arranged on one side of the hot bed along the moving direction of the hot bed; It is characterized in that The hot bed junction box comprises: A box body, wrapped around the outer side of the wiring part; A wire member is connected to the box body and is provided with a wire groove. One end of the wire of the hot bed is connected to the wiring portion, and the other end thereof passes through the wire groove. The extension direction of the wire groove is arranged at a first angle with the movement direction of the hot bed, and the inner peripheral wall of the wire groove at least partially supports the wire, so as to adjust the layout direction of the wire to increase the bending angle of one end of the wire passing through the wire groove relative to the hot bed.

2. The hot bed junction box according to claim 1, It is characterized in that The first angle ranges from 30° to 50°.

3. The hot bed junction box according to claim 1, It is characterized in that One end of the wire member is connected to a side of the box body away from the hot bed, and the other end of the wire member is inclined outwardly in a direction away from the hot bed.

4. The hot bed junction box as claimed in claim 3, It is characterized in that A first inclined surface is provided on a side of the box body away from the hot bed, and the first inclined surface is inclined outward from an end away from the hot bed toward an end close to the hot bed, one end of the wire member is connected to the first inclined surface, and an extension direction of the wire groove is perpendicular to the first inclined surface.

5. The hot bed junction box according to claim 1, It is characterized in that A cavity is provided inside the box body, the wire groove is connected to the cavity, one end of the wire is located in the cavity and electrically connected to the wiring part, and the other end thereof passes through the wire groove.

6. The hot bed junction box as claimed in claim 5, It is characterized in that A mounting opening is provided on a side of the box body away from the hot bed; The wire guide includes a first section, a second section and a third section connected in sequence, the outer diameter of the second section is smaller than the outer diameters of the first section and the third section, and the second section is clamped in the installation opening.

7. The hot bed junction box as claimed in claim 5, It is characterized in that The box body comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are arranged on opposite sides of the wiring portion and surround the cavity, and the upper shell and the lower shell are both connected to the wiring portion.

8. The hot bed junction box according to claim 7, It is characterized in that The upper shell is provided with a first connection hole, the wiring portion is provided with a second connection hole, and the lower shell is provided with a third connection hole. The first connection hole, the second connection hole, and the third connection hole are arranged correspondingly and are all for fasteners to pass through; the number of the first connection hole, the second connection hole, and the third connection hole is set to three.

9. The hot bed junction box according to claim 5, It is characterized in that The connection portion is provided with slots on opposite sides along a first direction, wherein the first direction is perpendicular to the movement direction of the hot bed; An opening is formed at one end of the box body close to the hot bed, the opening is connected to the cavity, the wiring part passes through the opening, and two opposite inner walls of the opening along the first direction are both provided with clamping protrusions, and the clamping protrusions are clamped in the clamping groove.

10. A 3D printing device, It is characterized in that It comprises a machine platform, a motion mechanism, a hot bed and a hot bed junction box as described in any one of claims 1 to 9, wherein the motion mechanism is installed on the machine platform, and the motion mechanism is connected to the hot bed in a transmission manner to drive the hot bed to move.

11. The 3D printing device according to claim 10, It is characterized in that The 3D printing device also includes a power supply, which is located on one side of the hot bed along the first direction, and one end of the wire passing through the wire groove is connected to the power supply.

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