Printing head transmission mechanism and three-dimensional printer

Abstract

The utility model provides a printing head transmission mechanism and a three-dimensional printer, and belongs to the technical field of printing heads. The printing head transmission mechanism comprises a printing head assembly, a transmission assembly and a limiting part. The transmission assembly is rotatably arranged on the printing head assembly. The limiting part is located on the face, facing the transmission assembly, of the printing head assembly, and the limiting part is used for limiting the rotation angle of the transmission assembly so that the transmission assembly can rotate within the limited angle range. The three-dimensional printer comprises the printing head transmission mechanism. According to the three-dimensional printer, the transmission assembly in the three-dimensional printer is improved, so that the drag chain base can rotate within the limited angle range under the action of the limiting part, the drag chain is effectively guided to move, and the situation that the drag chain is stuck or does not move smoothly in the movement process of the printing head assembly is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of print heads, and in particular to a print head transmission mechanism and a three-dimensional printer. Background Art

[0002] A 3D printer is a kind of machine that uses digital model files as the basis, and uses special wax materials, powdered metals or plastics and other adhesive materials to print layers of adhesive materials to create three-dimensional objects. With the development of technology, 3D printers are moving towards lighter, thinner, shorter, smaller and lower power consumption.

[0003] At present, 3D printers are used to manufacture products, and the technology of constructing objects by printing layer by layer. The principle of 3D printers is to put data and raw materials into the 3D printer, and the machine will build the product layer by layer according to the program. Among them, in the 3D printer, after the built-in wire of the 3D printer is connected to the print head, the outer surface of the wire can be covered with a tank chain. The design of the tank chain can effectively protect the wire, so that the tank chain can pull the wire during the movement of the print head, ensuring that the wire moves with the print head.

[0004] However, in actual production, many tank chains at this stage will not rotate smoothly during the rotation process, the tank chain is prone to jamming or the tank chain will be stuck during the movement, which will cause the movement of the print head to be unsmooth. In addition, in order to make the tank chain rotate more freely, it is often necessary to work in a wider scene, which has higher requirements for the working scene of the 3D printer. Utility Model Content

[0005] In order to solve at least one of the above technical problems, the present application provides a print head transmission mechanism and a 3D printer, which improves the transmission assembly in the 3D printer so that the drag chain seat can rotate within a limited angle range under the action of the limiter, thereby effectively guiding the drag chain to move, avoiding the situation where the print head assembly is stuck or moves unsmoothly during the movement of the drag chain. In addition, the 3D printer provided by the present application can be adapted to scenes in smaller spaces, has a simple and reliable structure, and saves costs.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The first aspect of the present application provides a print head transmission mechanism, comprising:

[0008] Print head assembly;

[0009] A transmission assembly, the transmission assembly is rotatably disposed on the print head assembly;

[0010] The limiting part is located on the side of the print head assembly facing the transmission assembly, and the limiting part is used to limit the rotation angle of the transmission assembly so that the transmission assembly rotates within a limited angle range.

[0011] Based on the above technical solution, the present application can also be improved as follows.

[0012] In a possible implementation, the transmission assembly includes: a drag chain seat and a plurality of drag chains connected in sequence;

[0013] One end of the drag chain seat is connected to the print head assembly, the other end of the drag chain seat is connected to the drag chain at the end, and the rotation angle between the drag chain seat and the print head assembly is less than or equal to the first angle;

[0014] One end of the drag chain has a protruding part arranged up and down, and the other end of the drag chain is provided with a through hole corresponding to the protruding parts of other drag chains, and the protruding part is engaged in the through hole so that the plurality of drag chains are connected to each other in pairs.

[0015] In a possible implementation, the plurality of drag chains include a plurality of first drag chains rotatably connected in sequence and a plurality of second drag chains rotatably connected in sequence. One of the first drag chains at the end is rotatably connected to the drag chain seat, and the other first drag chain at the end is rotatably connected to one of the second drag chains at the end;

[0016] The rotation angle between the first drag chains is less than or equal to the second angle, the rotation angle between the second drag chains is less than or equal to the third angle, and the second angle is greater than the third angle;

[0017] The rotation angle of the first drag chain and the second drag chain is less than or equal to the fourth angle, the fourth angle is less than or equal to the second angle, and the fourth angle is greater than or equal to the third angle;

[0018] The first angle is less than or equal to the second angle, and the first angle is greater than or equal to the third angle.

[0019] In a possible implementation, when two adjacent first drag chains are on a straight line, one first drag chain rotates relative to the other first drag chain in a first direction and a second direction relative to the straight line;

[0020] When two adjacent second drag chains are on a straight line, one second drag chain rotates relative to the other second drag chain in a first direction or a second direction relative to the straight line.

[0021] In a possible implementation, one end of each first drag chain is provided with a first recess, and the other end has a first protrusion. The two adjacent first drag chains are in contact with the two inner sides of the first recess and the first protrusion to form the rotation angle between the first drag chains;

[0022] One end of each second cable carrier is provided with a second recess, and the other end has a second protrusion. Two adjacent second cable carriers are in contact with the two inner sides of the second recess and the second protrusion, respectively, to form a rotation angle between the second cable carriers.

[0023] The opening angle of the first recess is greater than or equal to the opening angle of the second recess.

[0024] In a possible implementation, the cable carrier seat includes: a first connection part and a second connection part;

[0025] The first connection part is connected to the second connection part;

[0026] The first connection part is connected to the print head assembly, and the second connection part is rotatably connected to the cable carrier at the end.

[0027] In a possible implementation, the first connection part has a first end and a second end;

[0028] The height of the first end is greater than or equal to the height of the second end, so that the first connection part is inclined;

[0029] The first end is connected to the second connection part, and the height of the first end is the same as the height of the second connection part.

[0030] In a possible implementation, a first through hole is provided on the first connection part;

[0031] The first connection part is rotatably connected to the print head assembly by a fastener passing through the first through hole.

[0032] In a possible implementation, two opposite second through holes are provided on the second connection part;

[0033] The second connection part is engaged with the protruding part of the cable carrier connected to the second connection part through the second through hole.

[0034] In a possible implementation, the print head drive mechanism is applied to a 3D printer, and the 3D printer further includes: a wire;

[0035] The internal cavities formed by enclosing several connected cable carriers are provided for the wire to pass through, and the wire is located in the internal cavity and passes through the print head assembly.

[0036] In a possible implementation, the limiting part includes: a first limiting member and a second limiting member;

[0037] The first limiting member and the second limiting member are fixedly connected, and both the first limiting member and the second limiting member protrude from the surface of the print head assembly facing the drive assembly;

[0038] The size of the first limiting member is greater than or equal to the size of the second limiting member, so that the cable carrier seat touches the first limiting member during rotation;

[0039] One side of the second limiting member facing the drag chain seat has an arc surface, and the arc surface cooperates with the drag chain seat;

[0040] The first limiting member and the second limiting member are used for limiting when the transmission component rotates.

[0041] The second aspect of the present application provides a 3D printer, including the above-mentioned print head transmission mechanism.

[0042] The present application provides a print head transmission mechanism and a 3D printer. The print head transmission mechanism includes a print head assembly, a transmission component, and a limiting portion. Among them, the transmission component is rotatably arranged on the print head assembly. The limiting portion is located on one surface of the print head assembly facing the transmission component, and the limiting portion is used to limit the rotation angle of the transmission component so that the transmission component rotates within a limited angle range. The 3D printer includes the above-mentioned print head transmission mechanism. In this way, the present application can improve the transmission component in the 3D printer, so that the transmission component can rotate within the limited angle range under the action of the limiting portion, thereby effectively guiding the movement of the transmission component and avoiding the situation that the transmission component gets stuck or moves smoothly during the movement of the print head assembly. In addition, the 3D printer provided by the present application can be adapted to the scenario under a small space, has a simple and reliable structure, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic structural diagram of a print head transmission mechanism provided by an embodiment of the present application;

[0045] Figure 2 It is a cross-sectional view of a print head transmission mechanism provided by an embodiment of the present application;

[0046] Figure 3 It is a partially exploded schematic diagram of a print head transmission mechanism provided by an embodiment of the present application;

[0047] Figure 4 It is a schematic structural diagram of a drag chain seat of a print head transmission mechanism provided by an embodiment of the present application;

[0048] Figure 5 It is a front view of a drag chain seat of a print head transmission mechanism provided by an embodiment of the present application;

[0049] Figure 6 Top view of the drag chain seat of the print head drive mechanism provided by an embodiment of the present application;

[0050] Figure 7 Partial exploded view of the drag chain of the print head drive mechanism provided by an embodiment of the present application;

[0051] Figure 8 Structural schematic diagram of the print head assembly provided by an embodiment of the present application.

[0052] Description of reference numerals:

[0053] 100 - Print head drive mechanism;

[0054] 200 - Print head assembly;

[0055] 210 - Heat dissipation block; 220 - First clamping member; 230 - Second clamping member; 240 - Nozzle assembly; 250 - Fixing device;

[0056] 300 - Transmission assembly;

[0057] 310 - Drag chain seat; 311 - First connection portion; 3111 - First end; 3112 - Second end; 3113 - First through hole; 312 - Second connection portion; 3121 - Second through hole; 320 - Drag chain; 321 - Protrusion; 322 - Through hole; 323 - Internal cavity; 330 - First drag chain; 331 - First recess; 332 - First protrusion; 340 - Second drag chain; 341 - Second recess; 342 - Second protrusion;

[0058] 400 - Limiting portion;

[0059] 410 - First limiting member; 420 - Second limiting member; 421 - Arc surface;

[0060] 500 - Wire. Detailed implementation manners

[0061] As described in the background art, in actual production, in the current stage, many drag chains have the situation of unsmooth rotation during rotation. The drag chain is prone to wire jamming or the drag chain jams during movement, resulting in unsmooth movement of the print head. In addition, in order to enable the drag chain to rotate more freely, it is often necessary to work in a relatively wide scenario, which has high requirements for the working scenario of the 3D printer.

[0062] In view of the above technical problems, an embodiment of the present application provides a print head drive mechanism and a 3D printer. The print head drive mechanism includes a print head assembly, a drive assembly, and a limiting portion. Among them, the drive assembly is rotatably disposed on the print head assembly. The limiting portion is located on a surface of the print head assembly facing the drive assembly, and the limiting portion is used to limit the rotation angle of the drive assembly so that the drive assembly rotates within a limited angle range. The 3D printer may include a bracket and the above-mentioned print head drive mechanism. One end of the drive assembly of the print head drive mechanism is fixedly connected to the bracket, and the other end of the print head drive mechanism is connected to the print head. The print head is slidably connected to the bracket through a slide rail or the like. In this way, the present application can improve the drive assembly in the 3D printer, so that the drive assembly can rotate within the limited angle range under the action of the limiting portion, thereby effectively guiding the movement of the drive assembly and avoiding the situation that the drive assembly jams or moves smoothly during the movement of the print head assembly. In addition, the 3D printer provided by the present application can be adapted to scenarios in a small space, has a simple and reliable structure, and saves costs.

[0063] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0064] An embodiment of the present application provides a print head drive mechanism and a 3D printer. By improving the drive assembly in the 3D printer, the drive assembly can rotate within the limited angle range under the action of the limiting portion, thereby effectively guiding the movement of the drive assembly and avoiding the situation that the drive assembly jams or moves smoothly during the movement of the print head assembly. In addition, the 3D printer provided by the present application can be adapted to scenarios in a small space, has a simple and reliable structure, and saves costs. The following will introduce the specific structures of the print head drive mechanism and the 3D printer provided by the embodiments of the present application with reference to the accompanying drawings.

[0065] Refer to Figure 1 、 Figure 2 and Figure 3, in the first aspect of the embodiment of the present application, a print head drive mechanism 100 is provided. The print head drive mechanism 100 may include a print head assembly 200, a drive assembly 300, and a limit portion 400. Among them, the drive assembly 300 may be located on the print head assembly 200, and the drive assembly 300 may be rotatably connected to the print head assembly 200. It can be understood that one end of the drive assembly 300 may be fixed on the 3D printer, and the other end of the drive assembly 300 may be connected to the print head assembly 200. The drive assembly 300 has a high degree of freedom. During the rotation of the drive assembly 300, it can drive the print head assembly 200 to move along with the drive assembly 300, so that the print head assembly 200 can better adapt to high-speed movement. In a possible implementation manner, the limit portion 400 may be located on the surface of the print head assembly 200 facing the drive assembly 300, and the limit portion 400 can be used to limit the rotation angle of the drive assembly 300, so that the drive assembly 300 can rotate within a limited angle range, and will not cause the rotation angle to be too large, thus avoiding the situation that it is difficult to return due to too large a rotation angle. In this way, the setting of the limit portion 400 can effectively guide the movement of the drive assembly 300.

[0066] Based on the above embodiment, it can be understood that if the rotation of the drive assembly 300 is not restricted, the drive assembly 300 can achieve a 360° rotation. In this case, it is necessary to enable the drive assembly 300 to rotate smoothly in a relatively wide scenario. Otherwise, the drive assembly 300 may become stuck or move smoothly, and there may be an extra force that should not exist acting on the print head, thereby affecting the printing effect.

[0067] Continue to refer to Figure 1 and Figure 2 , based on the above embodiment, further, the drive assembly 300 may include: a drag chain seat 310 and a drag chain 320. In a possible implementation manner, the number of drag chains 320 may be several, and the present application does not limit the number of drag chains 320 here. In the embodiment of the present application, one end of the drag chain seat 310 may be connected to the print head assembly 200, and the other end of the drag chain seat 310 may be connected to one of the drag chains 320. Among them, the limit portion 400 is used to limit the rotation angle of the drag chain seat 310, and the rotation angle between the drag chain seat 310 and the print head assembly 200 may be less than or equal to a first angle. Exemplarily, the first angle may be 75°, that is, the rotation angle between the drag chain seat 310 and the print head assembly 200 may be less than or equal to 75°. In a possible implementation manner, such as Figure 3As shown, a plurality of cable carriers 320 can be connected in sequence, and one end of each cable carrier 320 can have two protrusions 321. It can be understood that the two protrusions 321 can be arranged vertically, and the two protrusions 321 are respectively located on the outer surface of the cable carrier 320. Correspondingly, two through holes 322 can be formed at the other end of each cable carrier 320, and the two through holes 322 respectively correspond to the two protrusions 321. In this way, the protrusion 321 on each cable carrier 320 can correspond to the through hole 322 on its adjacent cable carrier 320, so that the protrusion 321 can be engaged with the through hole 322, thereby enabling pairwise connection between a plurality of cable carriers 320, and further enabling a plurality of cable carriers 320 to form an entire cable carrier 320.

[0068] Continuing to refer to Figure 3 , on the basis of the above embodiments, in a possible implementation manner, the protrusion 321 on the cable carrier 320 can be a cylindrical structure, and the through hole 322 can also be a circular hole. In this way, rotational connection can be achieved between each cable carrier 320 and its adjacent cable carrier 320, and the rotational directions of the plurality of cable carriers 320 close to the cable carrier base 310 can be bidirectional, so that the entire cable carrier 320 has good degrees of freedom. It can be understood that the degrees of freedom of the plurality of cable carriers 320 close to the cable carrier base 310 are greater than those of the plurality of cable carriers 320 far from the cable carrier base 310.

[0069] Refer to Figure 3 and Figure 7 , on the basis of the above embodiments, a plurality of cable carriers 320 can include a plurality of first cable carriers 330 connected in sequence by rotation and a plurality of second cable carriers 340 connected in sequence by rotation. Among them, one first cable carrier 330 at the end can be rotatably connected to the cable carrier base 310, and the other first cable carrier 330 at the end can be rotatably connected to one second cable carrier 340 at the end, so that the entire cable carrier 320 and the cable carrier base 310 can both achieve rotation. It can be understood that rotational connection can also be achieved between different first cable carriers 330.

[0070] In a possible implementation manner, the rotation angle between the first cable carriers 330 is less than or equal to the second angle. Exemplarily, the second angle can be 150°, that is, the rotation angle between the first cable carriers 330 can be less than or equal to 150°. The rotation angle between the second cable carriers 340 is less than or equal to the third angle. Exemplarily, the third angle can be 45°, that is, the rotation angle between the second cable carriers 340 can be less than or equal to 45°. It can be understood that in this application, the second angle is greater than the third angle, and the rotational freedom degree between the first cable carriers 330 is greater than the rotational freedom degree between the second cable carriers 340.

[0071] Based on the above embodiments, the rotation angles of the first drag chain 330 and the second drag chain 340 are less than or equal to a fourth angle. Wherein, the fourth angle is less than or equal to the second angle and greater than or equal to the third angle. Exemplarily, the range of the fourth angle is 45°-150°. In this way, the connection between the first drag chain 330 and the second drag chain 340 serves as a transition between the first drag chain 330 and the second drag chain 340, which can make the rotation of the entire drag chain 320 smoother. Additionally, the first angle is less than or equal to the second angle and greater than or equal to the third angle. Exemplarily, the range of the first angle can also be 45°-150°, which is convenient for the drag chain seat 310 to rotate.

[0072] Based on the above embodiments, when two adjacent first drag chains 330 are on a straight line, one first drag chain 330 rotates relative to the other first drag chain 330 in a first direction and a second direction relative to the straight line, so that the first drag chain 330 realizes bidirectional rotation and has good freedom. Additionally, when two adjacent second drag chains 340 are on a straight line, one second drag chain 340 rotates relative to the other second drag chain 340 in a first direction or a second direction relative to the straight line, so that the second drag chain 340 realizes unidirectional rotation. Wherein, in a possible implementation manner, the rotation angle of the first drag chain 330 in a single direction can be 70°, the number of segments of the bidirectional rotating first drag chain 330 can be 6, and the length can be 80 mm. The embodiments of the present application do not limit this here. When two adjacent second drag chains 340 are on a straight line, one second drag chain 340 rotates relative to the other second drag chain 340 in a first direction or a second direction relative to the straight line, and the rotation direction of the second drag chain is set to a rotation direction that meets the requirements.

[0073] Continue to refer to Figure 7, on the basis of the above embodiments, one end of each first drag chain 330 may be provided with a first recess 331, and the other end of the first drag chain 330 may have a first protrusion 332. The first recess 331 has an opening. In this way, when two adjacent first drag chains 330 are connected, the first protrusion 332 of one first drag chain 330 can face the first recess 331 of the other first drag chain 330. By abutting the two inner side surfaces of the first protrusion 332 against the first recess 331, a rotation angle between the first drag chains 330 is formed. Furthermore, the rotation angle of the first drag chain 330 is limited by the opening of the first recess 331. Correspondingly, one end of each second drag chain 340 may be provided with a second recess 341, and the other end of the second drag chain 340 may have a second protrusion 342. The second recess 341 also has an opening. In this way, when two adjacent second drag chains 340 are connected, the second protrusion 342 of one second drag chain 340 can face the second recess 341 of the other second drag chain 340. By abutting the two inner side surfaces of the second protrusion 342 against the second recess 341, a rotation angle between the second drag chains 340 is formed. Furthermore, the rotation angle of the second drag chain 340 is limited by the opening of the second recess 341. It can be understood that the opening angle of the first recess 331 may be greater than or equal to the opening angle of the second recess 341, so that the rotation angle of the first drag chain 330 is greater than or equal to the rotation angle of the second drag chain 340, and the degree of freedom is more flexible.

[0074] Reference Figure 4 , on the basis of the above embodiments, further, the drag chain seat 310 may include: a first connecting portion 311 and a second connecting portion 312. Among them, the first connecting portion 311 may be connected to the second connecting portion 312. In a possible implementation manner, the first connecting portion 311 may be connected to the print head assembly 200, and the second connecting portion 312 may be rotatably connected to the drag chain 320 at the end, and relative rotation can be achieved between the second connecting portion 312 and the connected drag chain 320. In this way, the entire drag chain 320 is connected to the print head assembly 200 through the drag chain seat 310, and rotation can be performed between the drag chain 320 and the drag chain seat 310, and between the drag chain seat 310 and the print head assembly 200, with a large degree of freedom, so that the print head assembly 200 is smoother during printing.

[0075] Reference Figure 4 And Figure 5, on the basis of the above embodiments, the first connecting portion 311 may have a first end 3111 and a second end 3112. Among them, in a possible implementation manner, the height of the first end 3111 may be greater than or equal to the height of the second end 3112, so that the first connecting portion 311 can be arranged in an inclined shape. It can be understood that the first end 3111 may be connected to the second connecting portion 312, and the height of the first end 3111 may be the same as the height of the second connecting portion 312. In the embodiments of the present application, the first connecting portion 311 may be in contact with the limiting portion 400, and the second connecting portion 312 rotates around the first connecting portion 311. In this way, the inclined arrangement of the first connecting portion 311 can make the rotation of the drag chain seat 310 smoother.

[0076] Reference Figure 6 , on the basis of the above embodiments, a first through hole 3113 may be formed in the first connecting portion 311. Among them, in the embodiments of the present application, the first connecting portion 311 may be rotationally connected to the print head assembly 200 by a fastener passing through the first through hole 3113. In a possible implementation manner, the first connecting portion 311 can rotate around the fastener, thereby driving the second connecting portion 312 to rotate.

[0077] Continue to refer to Figure 4 And Figure 6 , on the basis of the above embodiments, a second through hole 3121 may be formed in the second connecting portion 312. Among them, in a possible implementation manner, the number of the second through holes 3121 may be two. In the embodiments of the present application, an example is given with the number of the second through holes 3121 being two. The two second through holes 3121 may be arranged oppositely. In this way, the two second through holes 3121 on the second connecting portion 312 can be respectively engaged with two protruding portions 321 of the drag chain 320 connected to the second connecting portion 312, so that the second connecting portion 312 is connected to the drag chain 320.

[0078] Continue to refer to Figure 3 , on the basis of the above embodiments, the print head drive mechanism 100 is applied to a 3D printer, and the 3D printer may further include: a wire 500. Among them, in a possible implementation manner, several connected drag chains 320 may form an entire drag chain 320, and an internal cavity 323 may be defined inside the entire drag chain 320, and the internal cavity 323 can be used for the wire 500 to pass through. In this way, one end of the wire 500 can be located in the internal cavity 323, and the other end of the wire 500 can pass through the print head assembly 200, so that the drag chain 320 can traction and protect the wire 500.

[0079] Continue to refer to Figure 3, on the basis of the above embodiments, further, the limiting portion 400 may include: a first limiting member 410 and a second limiting member 420. Wherein, the first limiting member 410 may be fixedly connected to the second limiting member 420, and both the first limiting member 410 and the second limiting member 420 may protrude from a surface of the print head assembly 200 facing the transmission assembly 300. In this way, when the drag chain seat 310 rotates on a surface connected to the print head assembly 200, since the first limiting member 410 and the second limiting member 420 protrude from a surface of the print head assembly 200 facing the transmission assembly 300, the rotation of the drag chain seat 310 can be restricted when the drag chain seat 310 touches the limiting portion 400. In a possible implementation manner, an arc surface 421 may be provided on a side of the second limiting member 420 facing the drag chain seat 310, and the arc surface 421 may cooperate with a first connecting portion 311 of the drag chain seat 310. It can be understood that both the first limiting member 410 and the second limiting member 420 can be used for limiting when the transmission assembly 300 rotates. In the embodiment of the present application, the size of the first limiting member 410 may be larger than the size of the second limiting member 420, so that the drag chain seat 310 can touch the first limiting member 410, and the second limiting member 420 does not affect the movement track of the drag chain seat 310. Additionally, the arc surface 421 of the second limiting member 420 can cooperate with the first connecting portion 311 of the drag chain seat 310, and can further limit the drag chain seat 310.

[0080] A second aspect of the embodiment of the present application provides a 3D printer (not shown in the figure). Wherein, the 3D printer may include a bracket (not shown in the figure) and the above-mentioned print head transmission mechanism 100. In a possible implementation manner, one ends of several drag chains 320 connected in the print head transmission mechanism 100 may be connected to the drag chain seat 310, and the other ends of the several drag chains 320 connected may be fixedly connected to the bracket. In this way, one end of the whole drag chain 320 is stable on the bracket, and the other end has a higher degree of freedom, so that the print head assembly 200 is more smooth during the movement process, and thus a better printing effect can be obtained.

[0081] In the embodiment of the present application, by improving the transmission assembly 300 in the 3D printer, the drag chain seat 310 can rotate within a limited angle range under the action of the limiting portion 400, thereby effectively guiding the movement of the drag chain 320, and avoiding the situation that the drag chain 320 gets stuck or moves smoothly during the movement of the print head assembly 200. In addition, the 3D printer provided by the present application can be adapted to scenarios with a small space, has a simple and reliable structure, and saves costs.

[0082] Reference Figure 8, the print head assembly 200 may further include a heat dissipation block 210, a first clamping member 220, a second clamping member 230, a nozzle assembly 240, and a fixing device 250. Both the first clamping member 220 and the second clamping member 230 are rotatably connected to the heat dissipation block 210. When the first clamping member 220 moves to the first position and the second clamping member 230 moves to the second position, the nozzle assembly 240 can be clamped to fix the nozzle assembly 240; when the first clamping member 220 is not in the first position or the second clamping member 230 is not in the second position, the first clamping member 220 and the second clamping member 230 can release the clamping of the nozzle assembly 240, and the nozzle assembly 240 can be quickly disassembled. The fixing device 250 is used to fix the positions of the first clamping member 220 and the second clamping member 230 that can clamp the nozzle assembly 240.

[0083] Wherein, through holes may be respectively formed in the first clamping member 220 and the second clamping member 230, and the through holes are used for the fixing device 250 to pass through. The first clamping member 220 and the second clamping member 230 may be respectively provided with clamping members for fixing the nozzle assembly 240.

[0084] Wherein, the fixing device 250 includes a stud and a nut. The stud is used to pass through the through holes of the first clamping member 220 and the second clamping member 230, and the nut is used to be threadedly connected with the stud to fix the first clamping member 220 and the second clamping member 230.

[0085] The nozzle assembly 240 includes a throat tube, a heating block, and a nozzle. The heating block is respectively connected to the throat tube and the nozzle. A clamping groove is provided on the throat tube, and the clamping groove is used for connection with the clamping member. Wherein, the clamping groove may be arranged around the throat tube.

[0086] It can be understood that the print head assembly 200 may further include a housing, and the limiting portion 400 may be fixedly connected to the housing. It can be understood that the specific connection structure between the limiting portion 400 and the print head assembly 200 is not limited.

[0087] Reference numeral 1, in other embodiments, the present application further provides a print head drive mechanism 100, including:

[0088] The print head assembly 200;

[0089] A drive assembly 300, the drive assembly 300 is rotatably arranged on the print head assembly 200;

[0090] A limiting portion 400, the limiting portion 400 is located on a surface of the print head assembly 200 facing the drive assembly 300, and the limiting portion 400 is used to limit the rotation angle of the drive assembly 300 so that the drive assembly 300 rotates within a limited angle range.

[0091] Reference numeral 2. Based on Reference numeral 1, the transmission assembly 300 includes: a drag chain base 310 and a plurality of drag chains 320 connected in sequence;

[0092] One end of the drag chain base 310 is connected to the print head assembly 200, and the other end of the drag chain base 310 is connected to the drag chain 320 at the end, and the rotation angle between the drag chain base 310 and the print head assembly 200 is less than or equal to the first angle;

[0093] One end of the drag chain 320 has a protruding portion 321 arranged vertically, and the other end of the drag chain 320 is provided with a through hole 322 corresponding to the protruding portion 321 of other drag chains 320, and the protruding portion 321 is engaged with the through hole 322 so that the plurality of drag chains 320 are connected to each other in pairs.

[0094] Reference numeral 3. Based on Reference numeral 2, the plurality of drag chains 320 include a plurality of first drag chains 330 connected in sequence and a plurality of second drag chains 340 connected in sequence. One of the first drag chains 330 at the end is rotatably connected to the drag chain base 310, and the other first drag chain 330 at the end is rotatably connected to one of the second drag chains 340 at the end;

[0095] The rotation angle between the first drag chains 330 is less than or equal to the second angle, the rotation angle between the second drag chains 340 is less than or equal to the third angle, and the second angle is greater than the third angle;

[0096] The rotation angles of the first drag chains 330 and the second drag chains 340 are less than or equal to the fourth angle, the fourth angle is less than or equal to the second angle, and the fourth angle is greater than or equal to the third angle;

[0097] The first angle is less than or equal to the second angle, and the first angle is greater than or equal to the third angle.

[0098] Reference numeral 4. Based on Reference numeral 3, when two adjacent first drag chains 330 are on a straight line, one first drag chain 330 rotates relative to the other first drag chain 330 in the first direction and the second direction relative to the straight line;

[0099] When two adjacent second drag chains 340 are on a straight line, one second drag chain 340 rotates relative to the other second drag chain 340 in the first direction or the second direction relative to the straight line.

[0100] Reference numeral 5. Based on Reference numeral 4, one end of each first drag chain 330 is provided with a first recess 331, and the other end has a first protrusion 332. The two adjacent first drag chains 330 are in contact with the two inner side surfaces of the first recess 331 through the first protrusion 332 to form the rotation angle between the first drag chains 330;

[0101] One end of each second cable carrier 340 is provided with a second recess 341, and the other end has a second protrusion 342. The two connected second cable carriers 340 are in contact with the two inner side surfaces of the second protrusion 342 and the second recess 341 to form a rotation angle between the second cable carriers 340;

[0102] The opening angle of the first recess 331 is greater than or equal to the opening angle of the second recess 341.

[0103] Reference numeral 6, on the basis of reference numeral 2, the cable carrier seat 310 includes: a first connection portion 311 and a second connection portion 312;

[0104] The first connection portion 311 is connected to the second connection portion 312;

[0105] The first connection portion 311 is connected to the print head assembly 200, and the second connection portion 312 is rotatably connected to the cable carrier 320 at the end.

[0106] Reference numeral 7, on the basis of reference numeral 6, the first connection portion 311 has a first end 3111 and a second end 3112;

[0107] The height of the first end 3111 is greater than or equal to the height of the second end 3112, so that the first connection portion 311 is arranged obliquely;

[0108] The first end 3111 is connected to the second connection portion 312, and the height of the first end 3111 is the same as the height of the second connection portion 312.

[0109] Reference numeral 8, on the basis of reference numeral 6, a first through hole 3113 is provided on the first connection portion 311;

[0110] The first connection portion 311 is rotatably connected to the print head assembly 200 by a fastener passing through the first through hole 3113.

[0111] Reference numeral 9, on the basis of reference numeral 6, two opposite second through holes 3121 are provided on the second connection portion 312;

[0112] The second connection portion 312 is engaged with the protrusion 321 of the cable carrier 320 connected to the second connection portion 312 through the second through hole 3121.

[0113] Reference numeral 10, on the basis of reference numeral 9, the print head drive mechanism 100 is applied to a 3D printer, and the 3D printer further includes: a wire 500;

[0114] The internal cavities 323 formed by enclosing several connected cable carriers 320 are provided for the wire 500 to pass through, and the wire 500 is located in the internal cavity 323 and passes through the print head assembly 200.

[0115] Reference numeral 11, based on the print head drive mechanism 100 of any one of reference numerals 2 - 10, the limiting part 400 includes: a first limiting member 410 and a second limiting member 420;

[0116] The first limiting member 410 and the second limiting member 420 are fixedly connected, and both the first limiting member 410 and the second limiting member 420 protrude from the surface of the print head assembly 200 facing the drive assembly 300;

[0117] The size of the first limiting member 410 is greater than or equal to the size of the second limiting member 420, so that the drag chain seat 310 touches the first limiting member 410 during rotation;

[0118] An arc surface 421 is provided on the side of the second limiting member 420 facing the drag chain seat 310, and the arc surface 421 cooperates with the drag chain seat 310;

[0119] The first limiting member 410 and the second limiting member 420 are used for limiting when the drive assembly 300 rotates.

[0120] In this specification, each embodiment or implementation manner is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0121] It should be noted that phrases such as "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0122] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood to convey singular usage or convey plural usage.

[0123] It should be readily understood that the terms "on", "above", and "over" in this disclosure should be construed in the broadest sense such that "on" not only means "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above" or "over" not only include the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intervening features or layers therebetween (i.e., directly on something).

[0124] In addition, spatial relative terms may be used in the text for convenience of description, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to another as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatial relative descriptors used in the text may be interpreted accordingly as well.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A print head drive mechanism, characterized in that, Comprising: A print head assembly; A transmission assembly rotatably disposed on the print head assembly; A limiting portion located on a surface of the print head assembly facing the transmission assembly, and the limiting portion is used to limit the rotation angle of the transmission assembly so that the transmission assembly rotates within a defined angular range.

2. The print head drive mechanism according to claim 1, characterized in that, The transmission assembly includes: a drag chain seat and a plurality of drag chains connected in sequence; One end of the drag chain seat is connected to the print head assembly, the other end of the drag chain seat is connected to the drag chain at the end, and the rotation angle between the drag chain seat and the print head assembly is less than or equal to a first angle; One end of the drag chain has a protruding portion arranged vertically, and the other end of the drag chain is provided with a through hole corresponding to the protruding portion of other drag chains, and the protruding portion is engaged with the through hole so that two adjacent drag chains are connected to each other.

3. The print head drive mechanism according to claim 2, characterized in that, The plurality of drag chains include a plurality of first drag chains rotatably connected in sequence and a plurality of second drag chains rotatably connected in sequence. One of the first drag chains at the end is rotatably connected to the drag chain seat, and the other first drag chain at the end is rotatably connected to one of the second drag chains at the end; The rotation angle between the first drag chains is less than or equal to a second angle, the rotation angle between the second drag chains is less than or equal to a third angle, and the second angle is greater than the third angle; The rotation angle of the first drag chain and the second drag chain is less than or equal to a fourth angle, the fourth angle is less than or equal to the second angle, and the fourth angle is greater than or equal to the third angle; The first angle is less than or equal to the second angle, and the first angle is greater than or equal to the third angle.

4. The print head drive mechanism according to claim 3, wherein When two adjacent first drag chains are on a straight line, one first drag chain rotates relative to the other first drag chain in a first direction and a second direction relative to the straight line; When two adjacent second drag chains are on a straight line, one second drag chain rotates relative to the other second drag chain in a first direction or a second direction relative to the straight line.

5. The printhead drive mechanism according to claim 4, wherein, One end of each first drag chain is provided with a first recess, and the other end has a first protrusion. Two adjacent first drag chains are in contact with the two inner sides of the first recess through the first protrusion to form the rotation angle between the first drag chains; One end of each second drag chain is provided with a second recess, and the other end has a second protrusion. Two adjacent second drag chains are in contact with the two inner sides of the second recess through the second protrusion to form the rotation angle between the second drag chains; The opening angle of the first recess is greater than or equal to the opening angle of the second recess.

6. The print head drive mechanism according to claim 2, characterized in that, The drag chain seat includes: a first connecting portion and a second connecting portion; The first connecting portion is connected to the second connecting portion, the first connecting portion is connected to the print head assembly, and the second connecting portion is rotatably connected to the drag chain at the end; The first connecting portion has a first end and a second end, and the height of the first end is greater than or equal to the height of the second end, so that the first connecting portion is arranged in an inclined shape; The first end is connected to the second connecting part, and the height of the first end is the same as that of the second connecting part.

7. The printhead drive mechanism according to claim 6, wherein A first through hole is formed in the first connecting part; The first connecting part is rotationally connected to the print head assembly by a fastener passing through the first through hole; Two opposite second through holes are formed in the second connecting part; The second connecting part is clamped on the protruding part of the drag chain connected to the second connecting part through the second through hole.

8. The printhead drive mechanism according to claim 7, wherein The print head drive mechanism is applied to a 3D printer, and the 3D printer further includes: a wire; The internal cavities formed by enclosing a plurality of connected drag chains are available for the wire to pass through, and the wire is located in the internal cavity and passes through the print head assembly.

9. The print head drive mechanism according to any one of claims 2-8, characterized in that The limiting part includes: a first limiting member and a second limiting member; The first limiting member and the second limiting member are fixedly connected, and both the first limiting member and the second limiting member protrude from the surface of the print head assembly facing the drive assembly; The size of the first limiting member is greater than or equal to the size of the second limiting member, so that the drag chain seat touches the first limiting member during rotation; An arc surface is provided on the side of the second limiting member facing the drag chain seat, and the arc surface cooperates with the drag chain seat; The first limiting member and the second limiting member are used for limiting when the drive assembly rotates.

10. A three-dimensional printer, characterized in that, A print head drive mechanism according to any one of claims 1-9 above is included.

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