3D (three-dimensional) direct-writing printing multifunctional spray head device with quick insertion function

Abstract

The utility model relates to a 3D direct-writing printing multifunctional spray head device with a quick insertion function. A containing cavity is formed in the middle of a shell. The extrusion screw is installed in the containing cavity, and a first clamping groove is formed in the outer surface of the top of the extrusion screw. The quick plug comprises a quick plug body and two convex rings installed at the two ends of the quick plug body respectively, a cavity is formed in the quick plug body, the lower end of the quick plug body is used for being connected with the first clamping groove in a clamped mode, the outer diameter of the convex rings is smaller than that of the quick plug body, and the convex rings abut against a bearing arranged at the top of the extrusion screw in a sleeving mode; a second clamping groove is formed in the outer surface of the output shaft of the driving unit and used for being connected with the upper end of the quick plug in a clamped mode, and the other protruding ring abuts against the bearing seat of the driving unit. According to the technical scheme, the two convex rings are arranged at the two ends of the quick plug body, so that the contact surface between the quick plug and the bearing of the extrusion screw and the contact surface between the quick plug and the bearing seat of the driving unit are reduced, abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing nozzles, and in particular to a multi-functional 3D direct-write printing nozzle device with quick-connect function. Background Technology

[0002] 3D direct ink writing (DIW) is an additive manufacturing technology that builds three-dimensional structures layer by layer by precisely controlling the extrusion and deposition of highly viscoelastic materials. Its core feature is the direct writing and shaping of functional "inks" (such as ceramic slurries, hydrogels, conductive materials, etc.) without the need for external forces such as photopolymerization or high-temperature sintering, making it suitable for complex geometries and multi-material integration.

[0003] The extrusion screw of existing 3D direct-write printing nozzle devices is directly connected to the motor, which can easily cause wear at the connection point after long-term use. Utility Model Content

[0004] In view of the above problems, this application provides a 3D direct writing printing multi-functional nozzle device with quick-connect function to solve the technical problem that the extrusion screw of the existing 3D direct writing printing nozzle device is directly connected to the motor, which is prone to wear at the connection point after long-term use.

[0005] To achieve the above objectives, the inventors provide a multi-functional printhead device for 3D direct writing printing with quick-insert functionality, comprising:

[0006] The outer shell has a receiving cavity in the middle, a feed inlet at the top, and a nozzle at the bottom. Both the feed inlet and the nozzle are connected to the receiving cavity.

[0007] An extrusion screw is installed inside a receiving cavity, and a first slot is formed on the outer surface of the top of the extrusion screw;

[0008] The quick connector includes a quick connector body and two protruding rings respectively installed at both ends of the quick connector body. The quick connector body has a cavity inside. The lower end of the quick connector body is used to engage with the first slot. The outer diameter of the protruding ring is smaller than the outer diameter of the quick connector body. The protruding ring abuts against the bearing sleeved on the top of the extrusion screw.

[0009] The drive unit has a second slot on the outer surface of its output shaft. The second slot is used to engage with the upper end of the quick connector. Another convex ring abuts against the bearing seat of the drive unit. The drive unit is used to drive the extrusion screw to rotate within the receiving cavity.

[0010] Unlike existing technologies, the technical solution of this application provides two protruding rings at both ends of the quick-connect body, and the outer diameter of the protruding rings is smaller than the outer diameter of the quick-connect body. This reduces the contact area between the quick-connect and the bearing of the extrusion screw and the bearing seat of the drive unit, thereby reducing wear and extending service life.

[0011] As one embodiment of this utility model, the quick plug body has two first threaded holes spaced apart in the vertical direction. The quick plug also includes two sets of first snap-fit ​​components. Each first threaded hole corresponds to a set of first snap-fit ​​components. The two sets of first snap-fit ​​components are used to snap into the first slot and the second slot, respectively.

[0012] Thus, one of the first threaded holes corresponds to the first slot, and the other first threaded hole corresponds to the second slot. The two first threaded holes can be set in the same vertical direction or opposite to each other. A first engaging component is installed at each of the two first threaded holes to engage with the first slot and the second slot, thereby ensuring the connection between the extrusion screw and the drive unit.

[0013] As one embodiment of the present invention, the first snap-fit ​​assembly includes a first threaded block, a first elastic element, and a first snap-fit ​​bead. The first threaded block is threadedly connected to the first threaded hole. One side of the first elastic element is connected to the first threaded block, and the other side of the first elastic element is connected to the first snap-fit ​​bead. The first snap-fit ​​bead is at least partially located in the cavity and is used to snap into the first slot and the second slot.

[0014] Thus, the first retaining ball is used to engage with the first and second retaining slots, thereby connecting the extrusion screw to the drive unit. The first elastic element is elastic, capable of elastically contracting under pressure and returning to its initial shape when the pressure is removed. It can be made of metallic elastic materials such as metal springs, or non-metallic elastic materials such as rubber or silicone.

[0015] As one embodiment of this utility model, the first threaded block has an internal hexagonal hole on the side away from the cavity.

[0016] Thus, when it is necessary to cancel the engagement of the first snap-fit ​​component, the first threaded block can be removed with the help of an external tool, thereby removing the first elastic element and the first snap ball connected to it, and canceling the restriction on the first and second snap-fit ​​slots.

[0017] As one embodiment of this utility model, the 3D direct writing printing multi-functional nozzle device with quick-connect function also includes an internal hex wrench, which is used to cooperate with the internal hexagonal hole to remove the first retaining ball's restriction on the first slot and the second slot.

[0018] Thus, an internal hex wrench can be provided for use with the internal hex socket, thereby assisting in screwing the first threaded block into or out of the first threaded hole, making it more convenient.

[0019] As one embodiment of this utility model, two first slots are formed on the outer surface of the top of the extrusion screw in a horizontal direction, and two second slots are formed on the outer surface of the output shaft of the drive unit in a horizontal direction.

[0020] The quick-connect plug body also has a second threaded hole that is horizontally opposite to the first threaded hole. The quick-connect plug also includes two sets of second snap-fit ​​components. Each second threaded hole corresponds to one set of second snap-fit ​​components. The two sets of second snap-fit ​​components are used to snap into the first slot and the second slot, respectively.

[0021] Thus, by setting two sets of second snap-fit ​​components, both the extrusion screw and the drive unit have two snap-fit ​​points, thereby strengthening the connection between the extrusion screw and the drive unit.

[0022] As one embodiment of the present invention, the second snap-fit ​​assembly includes a second threaded block, a second elastic member, and a second snap-fit ​​bead. The second threaded block is threadedly connected to the second threaded hole. One side of the second elastic member is connected to the second threaded block, and the other side of the second elastic member is connected to the second snap-fit ​​bead. The second snap-fit ​​bead is at least partially located in the cavity and is used to snap into the first slot and the second slot.

[0023] Thus, the second retaining ball is used to engage with the remaining first and second retaining slots, thereby strengthening the connection between the extrusion screw and the drive unit. The second elastic element is elastic, capable of elastically contracting under pressure and returning to its initial shape when the pressure is removed. It can be made of metallic elastic materials such as metal springs, or non-metallic elastic materials such as rubber or silicone.

[0024] As one embodiment of this utility model, the outer surface of the quick plug body is provided with anti-slip threads.

[0025] Thus, by setting anti-slip threads to increase the friction on the outer surface of the quick-connect body, it is easier to pick up or rotate the quick-connect body.

[0026] As one embodiment of this utility model, a positioning hole is also provided inside the convex ring. The positioning hole is chamfered and is used for positioning with the extrusion screw.

[0027] Thus, by setting a positioning hole and cooperating with the extrusion screw for positioning, the connection position of the quick connector body is determined, thereby facilitating the quick connector body to engage with the first and second slots.

[0028] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0029] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0030] In the accompanying drawings of the instruction manual:

[0031] Figure 1 This is a schematic diagram of a multi-functional printhead device for 3D direct writing printing with quick-connect function according to an embodiment of this application;

[0032] Figure 2 This is a front view of a 3D direct-write printing multi-functional printhead device with quick-plug functionality according to an embodiment of this application;

[0033] Figure 3 for Figure 2 Sectional view of AA;

[0034] Figure 4 for Figure 3 An enlarged view of one embodiment of B;

[0035] Figure 5 for Figure 3 An enlarged view of another embodiment of B;

[0036] Figure 6 This is a schematic diagram of the structure of a quick-connect plug according to an embodiment of this application;

[0037] Figure 7 This is a front view of a quick-connect plug according to an embodiment of this application;

[0038] Figure 8 for Figure 7 A sectional view of CC.

[0039] The reference numerals used in the above figures are explained as follows:

[0040] 100 - 3D direct writing printing multi-functional nozzle device with quick-connect function; 1 - Housing; 11 - Receiving cavity; 12 - Feed port; 13 - Nozzle; 2 - Extrusion screw; 3 - Quick connector; 31 - Quick connector body; 311 - Cavity; 312 - First threaded hole; 313 - Anti-slip thread; 314 - Second threaded hole; 32 - Convex ring; 321 - Positioning hole; 33 - First snap-fit ​​assembly; 331 - First threaded block; 3311 - Internal hexagonal hole; 332 - First elastic element; 333 - First retaining ball; 34 - Second snap-fit ​​assembly; 341 - Second threaded block; 342 - Second elastic element; 343 - Second retaining ball; 4 - Drive unit; X - Horizontal direction; Y - Vertical direction. Detailed Implementation

[0041] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0042] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0043] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0044] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0045] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0046] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0047] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0048] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] For ease of explanation, horizontal and vertical directions are defined, and these directions are perpendicular to each other. For ease of explanation, as... Figure 4 and Figure 5 As shown by the arrows, the direction of arrow X is the horizontal direction, and the direction of arrow Y is the vertical direction.

[0051] According to some embodiments of this application, please refer to Figures 1 to 8 This embodiment relates to a 3D direct-write printing multi-functional nozzle device 100 with quick-connect function, including a housing 1, an extrusion screw 2, a quick-connect nozzle 3, and a drive unit 4. The housing 1 has a receiving cavity 11 in the middle, a feed inlet 12 on the top of the housing 1, and a nozzle 13 on the bottom of the housing 1. Both the feed inlet 12 and the nozzle 13 are connected to the receiving cavity 11. The extrusion screw 2 is installed in the receiving cavity 11, and a first slot is formed on the outer surface of the top of the extrusion screw 2. The quick-connect nozzle 3 includes a quick-connect nozzle body 31 and nozzles respectively installed on the quick-connect nozzle. The plug body 31 has two protruding rings 32 at both ends. The interior of the quick plug body 31 has a cavity 311. The lower end of the quick plug body 31 is used to engage with the first slot. The outer diameter of the protruding ring 32 is smaller than the outer diameter of the quick plug body 31. The protruding ring 32 abuts against the bearing sleeved on the top of the extrusion screw 2. The output shaft of the drive unit 4 has a second slot on its outer surface. The second slot is used to engage with the upper end of the quick plug 3. The other protruding ring 32 abuts against the bearing seat of the drive unit 4. The drive unit 4 is used to drive the extrusion screw 2 to rotate in the receiving cavity 11.

[0052] The extrusion screw 2 can be made of non-metallic materials, such as PA, PP, or ABS, which increases the lifespan of the extrusion screw 2 and reduces usage and maintenance costs.

[0053] The drive unit 4 can be a power source such as an electric motor or motor to drive the extrusion screw 2 to rotate inside the cavity.

[0054] The technical solution of this application provides two protruding rings 32 at both ends of the quick connector body 31, and the outer diameter of the protruding rings 32 is smaller than the outer diameter of the quick connector body 31, thereby reducing the contact surface at the connection between the quick connector 3 and the bearing of the extrusion screw 2 and the bearing seat of the drive unit 4, reducing wear, and extending service life.

[0055] According to some embodiments of this application, optionally, such as Figure 4 and Figure 5 As shown, the quick plug body 31 has two first threaded holes 312 spaced apart along the vertical direction Y. The quick plug 3 also includes two sets of first snap-fit ​​components 33. Each first threaded hole 312 corresponds to a set of first snap-fit ​​components 33. The two sets of first snap-fit ​​components 33 are used to snap into the first slot and the second slot, respectively.

[0056] Thus, one of the first threaded holes 312 corresponds to the first slot, and the other first threaded hole 312 corresponds to the second slot. Figure 4 As shown, the two first threaded holes 312 can be set in the same vertical direction Y, such as... Figure 5As shown, they can also be arranged opposite each other. A first snap-fit ​​assembly 33 is installed at each of the two first threaded holes 312 to snap into the first slot and the second slot, thereby ensuring the connection between the extrusion screw 2 and the drive unit 4.

[0057] According to some embodiments of this application, optionally, such as Figure 4 As shown, the first snap-fit ​​assembly 33 includes a first threaded block 331, a first elastic member 332, and a first snap-fit ​​bead 333. The first threaded block 331 is threadedly connected to the first threaded hole 312. One side of the first elastic member 332 is connected to the first threaded block 331, and the other side of the first elastic member 332 is connected to the first snap-fit ​​bead 333. The first snap-fit ​​bead 333 is at least partially located in the cavity 311 and is used to snap into the first snap-fit ​​slot and the second snap-fit ​​slot.

[0058] In actual use, the quick-connect body 31 connects the extrusion screw 2 and the drive unit 4. At this time, the first threaded hole 312 is not screwed into the first snap-fit ​​assembly 33. Then, the first snap-fit ​​assembly 33 is screwed into the first threaded hole 312, and the first snap-fit ​​ball 333 contacts the output shaft of the extrusion screw 2 and the drive unit 4, causing the first elastic element 332 to compress and deform. Finally, the quick-connect body 31 is rotated so that the first snap-fit ​​ball 333 aligns with the first and second slots. Under the action of the first elastic element 332, the first snap-fit ​​ball 333 returns to its original shape and snaps into the first and second slots.

[0059] Thus, the first retaining bead 333 is used to engage with the first retaining slot and the second retaining slot, thereby connecting the extrusion screw 2 with the drive unit 4. The first elastic element 332 is elastic, capable of elastically contracting under pressure and returning to its initial shape when the pressure is removed. It can be made of metallic elastic materials such as metal springs, or non-metallic elastic materials such as rubber or silicone.

[0060] According to some embodiments of this application, optionally, such as Figure 4 and Figure 5 As shown, the first threaded block 331 has an internal hexagonal hole 3311 on the side away from the cavity 311.

[0061] Thus, when it is necessary to cancel the engagement of the first snap-fit ​​component 33, the first threaded block 331 can be removed with the help of an external tool, thereby removing the first elastic element 332 and the first snap bead 333 connected to it, and canceling the restriction on the first slot and the second slot.

[0062] According to some embodiments of this application, optionally, the 3D direct writing printing multi-functional nozzle device 100 with quick-connect function also includes an Allen wrench, which is used to engage with the Allen hole 3311 to release the first retaining bead 333 from the first slot and the second slot.

[0063] Thus, an internal hex wrench can be provided for use with the internal hex socket 3311, thereby assisting in screwing the first threaded block 331 into or out of the first threaded hole 312, making it more convenient.

[0064] According to some embodiments of this application, optionally, such as Figure 4 and Figure 5 As shown, the outer surface of the top of the extrusion screw 2 has two first slots opposite each other along the horizontal direction X, and the outer surface of the output shaft of the drive unit 4 has two second slots opposite each other along the horizontal direction X. The quick connector body 31 also has a second threaded hole 314 that is opposite to the first threaded hole 312 along the horizontal direction X. The quick connector 3 also includes two sets of second snap-fit ​​components 34. Each second threaded hole 314 corresponds to a set of second snap-fit ​​components 34. The two sets of second snap-fit ​​components 34 are used to snap-fit ​​with the first slot and the second slot respectively.

[0065] Thus, by setting two sets of second snap-fit ​​components 34, both the extrusion screw 2 and the drive unit 4 have two snap-fit ​​points, thereby strengthening the connection between the extrusion screw 2 and the drive unit 4.

[0066] According to some embodiments of this application, optionally, such as Figure 4 and Figure 5 As shown, the second snap-fit ​​assembly 34 includes a second threaded block 341, a second elastic member 342, and a second snap-fit ​​bead 343. The second threaded block 341 is threadedly connected to the second threaded hole 314. One side of the second elastic member 342 is connected to the second threaded block 341, and the other side of the second elastic member 342 is connected to the second snap-fit ​​bead 343. The second snap-fit ​​bead 343 is at least partially located in the cavity 311 and is used to snap into the first and second snap-fit ​​slots.

[0067] The second threaded block 341 also has an internal hexagonal hole 3311 on the side away from the cavity 311, which can be used with an internal hexagonal wrench.

[0068] In actual use, the quick-connect body 31 connects to the extrusion screw 2 and the drive unit 4. At this time, the first threaded hole 312 is not screwed into the first snap-fit ​​component 33, and the second threaded hole 314 is not screwed into the second snap-fit ​​component 34. Then, the first snap-fit ​​component 33 is screwed into the first threaded hole 312, and the second snap-fit ​​component 34 is screwed into the second threaded hole 314. The first snap-fit ​​ball 333 and the second snap-fit ​​ball 343 come into contact with the output shaft of the extrusion screw 2 and the drive unit 4, causing the first elastic element 332 and the second elastic element 342 to compress and deform. Finally, the quick-connect body 31 is rotated so that the first snap-fit ​​ball 333 and the second snap-fit ​​ball 343 align with the corresponding first and second slots. Under the action of the first elastic element 332 and the second elastic element 342, the first snap-fit ​​ball 333 and the second snap-fit ​​ball 343 return to their original shape and are engaged in the corresponding first and second slots.

[0069] Thus, the second retaining bead 343 is used to engage with the remaining first and second retaining slots, thereby strengthening the connection between the extrusion screw 2 and the drive unit 4. The second elastic element 342 is elastic, capable of elastically contracting under pressure and returning to its initial shape when the pressure is removed. It can be made of metallic elastic materials such as metal springs, or non-metallic elastic materials such as rubber or silicone.

[0070] According to some embodiments of this application, optionally, such as Figure 6 and Figure 7 As shown, the outer surface of the quick-connect plug body 31 is provided with anti-slip threads 313.

[0071] Thus, by setting anti-slip threads 313 to increase the friction on the outer surface of the quick-connect body 31, it is easier to pick up or rotate the quick-connect body 31.

[0072] According to some embodiments of this application, optionally, such as Figure 8 As shown, a positioning hole 321 is also provided inside the convex ring 32. The positioning hole 321 is chamfered and is used for positioning with the extrusion screw 2.

[0073] Thus, by setting the positioning hole 321 to cooperate with the extrusion screw 2 for positioning, the connection position of the quick plug body 31 is determined, thereby facilitating the quick plug body 31 to engage with the first slot and the second slot.

[0074] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A 3D direct writing printing multifunctional nozzle device with quick insertion function, characterized in that, The utility model provides a 3D direct writing printing multifunctional nozzle device with quick plug function, which comprises a shell, an extrusion screw, a driving unit and a quick plug. The shell has a receiving cavity in the middle part, an inlet opening in the top part and a nozzle in the bottom part, and the inlet opening and the nozzle are in communication with the receiving cavity. The extrusion screw is installed in the receiving cavity, and the outer surface of the top part of the extrusion screw is provided with a first clamping groove. The quick plug comprises a quick plug body and two convex rings respectively installed at the two ends of the quick plug body, the inside of the quick plug body has a cavity, the lower end of the quick plug body is used for clamping the first clamping groove, the outer diameter of the convex ring is smaller than the outer diameter of the quick plug body, and the convex ring abuts against a bearing sleeved on the top part of the extrusion screw. The outer surface of the output shaft of the driving unit is provided with a second clamping groove used for clamping the upper end of the quick plug, the other convex ring abuts against a bearing seat of the driving unit, and the driving unit is used for driving the extrusion screw to rotate in the receiving cavity.

2. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 1, characterized in that, Two first threaded holes are formed in the quick plug body and spaced apart in the vertical direction, and the quick plug further comprises two groups of first clamping assemblies, each first threaded hole corresponds to a group of first clamping assemblies, and the two groups of first clamping assemblies are respectively used for clamping the first clamping groove and the second clamping groove.

3. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 2, characterized in that, The first clamping assembly comprises a first threaded block, a first elastic member and a first clamping bead, the first threaded block is threadedly connected with the first threaded hole, one side of the first elastic member is connected with the first threaded block, the other side of the first elastic member is connected with the first clamping bead, the first clamping bead is at least partially located in the cavity and is used for clamping into the first clamping groove and the second clamping groove.

4. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 3, characterized in that, The other side of the first clamping bead is connected with the first clamping bead.

5. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 4, characterized in that, The 3D direct writing printing multifunctional nozzle device with quick plug function further comprises an internal hexagonal wrench used for cooperating with the internal hexagonal hole to cancel the limitation of the first clamping bead on the first clamping groove and the second clamping groove.

6. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 2, characterized in that, The outer surface of the top part of the extrusion screw is relatively provided with two first clamping grooves in the horizontal direction, and the outer surface of the output shaft of the driving unit is relatively provided with two second clamping grooves in the horizontal direction. The second threaded hole is formed in the quick plug body and is opposite to the first threaded hole in the horizontal direction, and the quick plug further comprises two groups of second clamping assemblies, each second threaded hole corresponds to a group of second clamping assemblies, and the two groups of second clamping assemblies are respectively used for clamping the first clamping groove and the second clamping groove.

7. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 6, characterized in that, The second clamping assembly comprises a second threaded block, a second elastic member and a second clamping bead, the second threaded block is threadedly connected with the second threaded hole, one side of the second elastic member is connected with the second threaded block, the other side of the second elastic member is connected with the second clamping bead, the second clamping bead is at least partially located in the cavity and is used for clamping into the first clamping groove and the second clamping groove.

8. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 1, characterized in that, The outer surface of the quick plug body is provided with an anti-skid thread.

9. The 3D direct writing printing multi-functional nozzle device with quick insertion function according to claim 1, characterized in that, A positioning hole is further formed in the convex circle, the positioning hole is chamfered, and the positioning hole is used for positioning with an extrusion screw.

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