3D printing nozzle with cutting function

Abstract

The utility model belongs to the technical field of composite material 3D printing, and particularly relates to a 3D printing spray head with a cutting function, which comprises a support, a driving part, a feeding assembly, a nozzle assembly, a heating assembly and a cutting assembly. The cutting assembly comprises a first transmission wheel, a second transmission wheel, a one-way transmission part, a cutter shaft and a blade, the first transmission wheel is in transmission connection with the driving part, the one-way transmission part is connected between the second transmission wheel and the cutter shaft, and the one-way transmission part is configured to rotate in the first direction when the second transmission wheel rotates in the first direction; and when the second transmission wheel rotates in the second direction, the one-way transmission part enables the second transmission wheel to be in transmission connection with the cutter shaft, and the cutter shaft drives the blade to rotate and is used for cutting off the wire rod. The feeding assembly and the cutting assembly in the 3D printing spray head share one driving part, so that the use number of the driving parts is reduced, and the manufacturing cost of the 3D printing spray head with the cutting function is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material 3D printing, in particular to a 3D printing nozzle with a cutting function. Background Technique

[0002] 3D printing adopts the principle of layer-by-layer stacking, cutting complex three-dimensional parts into multiple two-dimensional planes. Different movement paths will be formed on the same plane. The fused deposition modeling technology is used to melt the wire into a molten state and spray the filamentous wire through the printing nozzle and print along the movement path; for complex parts, there are usually multiple path breakpoints in the path on the same plane. When encountering a path breakpoint, the printing nozzle will stop printing and jump to the next target position. Continuous fiber composite materials are applied to 3D printing technology as printing wires due to their high strength, high stiffness, light weight and other characteristics. However, due to their high strength and high toughness brought by their own materials, they are not easy to break. And there are multiple path breakpoints during the printing process. If the wire cannot be cut in time when encountering a path breakpoint, phenomena such as messy wires will occur. Therefore, in order to ensure that no messy wires and other phenomena occur when encountering a path breakpoint during the printing process, a cutting device is needed to cut the wire in time.

[0003] At present, a cutting mechanism is mainly set at the nozzle in 3D printing equipment. When encountering a path breakpoint, the cutting mechanism is used to cut the wire, solving the problem that continuous fiber composite materials are not easy to cut. However, the cutting mechanism in the current 3D printing nozzle is powered by an additional driving device. Compared with the original structure with only one driving device driving the feeding mechanism, there is an additional driving device. The additional driving device will increase the manufacturing cost of the 3D printing nozzle. Content of the Utility Model

[0004] The purpose of the utility model is to provide a 3D printing nozzle with a cutting function. The feeding component and the cutting component in the nozzle share a driving device, which realizes both the feeding function and the cutting function through one driving device, reducing the manufacturing cost of the 3D printing nozzle.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model provides a 3D printing nozzle with a cutting function, including:

[0007] A bracket;

[0008] A driving member, arranged on the bracket;

[0009] The feeding component includes a feeding wheel drivingly connected to the driving member, and a rotating wheel rotatably connected to the bracket. The feeding wheel and the rotating wheel can jointly clamp the wire, and the driving member is used to drive the feeding wheel to rotate;

[0010] The nozzle component is arranged on the bracket. One end of the nozzle component is for the wire to enter and the other end is for extruding the wire;

[0011] The heating component is arranged on the nozzle component, and the heating component is used to heat the nozzle component;

[0012] The cutting component includes a first transmission wheel drivingly connected to the driving member, a second transmission wheel meshing with the first transmission wheel, a one-way transmission member, a cutter shaft, and a blade connected to one end of the cutter shaft. The one-way transmission member is connected between the second transmission wheel and the cutter shaft, and the one-way transmission member is configured such that when the second transmission wheel rotates in a first direction, the one-way transmission member disconnects the transmission connection between the second transmission wheel and the cutter shaft, and when the second transmission wheel rotates in a second direction, the one-way transmission member connects the second transmission wheel and the cutter shaft in transmission and the cutter shaft drives the blade to rotate and is used to cut the wire. The first direction and the second direction are opposite.

[0013] Further, the cutter shaft further includes a transmission shaft and a sleeve. The one-way transmission member is connected between the second transmission wheel and the transmission shaft. The transmission shaft is slidably connected to the sleeve and is restricted from relative rotation. The blade is connected to one end of the sleeve away from the transmission shaft;

[0014] A first inclined surface is provided at the bottom of the bracket. The sleeve is further provided with a driving portion. The driving portion abuts against the first inclined surface. The sleeve is configured such that when the transmission shaft rotates, the sleeve rotates and moves along the axis direction of the transmission shaft.

[0015] Further, a first through hole is formed in the side wall of the sleeve, and a receiving cavity is formed in the sleeve. The first through hole communicates with the receiving cavity. The transmission shaft is inserted into the receiving cavity. The transmission shaft includes a first convex portion, and the first convex portion passes through the first through hole;

[0016] The cutter shaft further includes a return spring. The return spring is located in the receiving cavity and sleeved on the transmission shaft. One end of the return spring abuts against the sleeve, and the other end of the return spring abuts against the first convex portion.

[0017] Further, both the first transmission wheel and the second transmission wheel are helical gears.

[0018] Further, the feeding assembly further includes a third driving wheel and a fourth driving wheel. The driving member is in transmission connection with the third driving wheel. The fourth driving wheel meshes with the third driving wheel, and the fourth driving wheel is in transmission connection with the feeding wheel.

[0019] Further, the nozzle assembly includes a throat and a nozzle. The throat is connected to the bracket. The throat communicates with the nozzle. The throat is for the wire to pass through. The heating assembly is arranged on the nozzle and is used to heat the nozzle. The nozzle is used to extrude the melted wire.

[0020] Further, the heating assembly includes a mounting block and a heating rod. The mounting block is sleeved on the nozzle. The heating rod is arranged on the mounting block and is used to heat the nozzle.

[0021] Further, the heating assembly further includes a temperature sensor. The temperature sensor is arranged on the mounting block. The temperature sensor is used to measure the heating temperature.

[0022] Further, the feeding assembly further includes an adjusting seat, an adjusting bolt and an elastic member. The rotating wheel is rotatably connected to the adjusting seat. One end of the adjusting seat is movably arranged on the bracket. The other end of the adjusting seat is provided with a second through hole. The adjusting bolt passes through the second through hole and is threadedly connected to the bracket. The elastic member is located between the bracket and the adjusting seat and is sleeved on the adjusting bolt.

[0023] Further, the feeding assembly further includes a feeding pipe. The feeding pipe is connected to the bracket and is vertically spaced directly above the gap between the feeding wheel and the rotating wheel. The feeding pipe is for the wire to pass through.

[0024] The 3D printing nozzle with a cutting function of the present utility model has at least the following beneficial effects:

[0025] The utility model of a 3D printing nozzle with a cutting function comprises a bracket, a driving member, a feeding assembly, a nozzle assembly, a heating assembly and a cutting assembly. The driving member is arranged on the bracket; the feeding assembly comprises a feeding wheel and a rotating wheel, the driving member drives the feeding wheel to rotate and is used together with the rotating wheel to drive the wire feeding; the nozzle assembly is arranged on the bracket and one end is used for the wire to enter, and the other end is used for extruding the wire; the heating assembly is arranged on the nozzle assembly and is used to heat the nozzle assembly; the cutting assembly comprises a first transmission wheel connected to the driving member, a second transmission wheel meshed with the first transmission wheel, a one-way transmission member, a knife shaft, and a blade connected to one end of the knife shaft, the one-way transmission member is connected between the second transmission wheel and the knife shaft, and the one-way transmission member is configured to disconnect the transmission connection between the second transmission wheel and the knife shaft when the second transmission wheel rotates in the first direction, and when the second transmission wheel rotates in the second direction, the one-way transmission member connects the second transmission wheel to the knife shaft and the knife shaft drives the blade to rotate and is used to cut the wire, and the first direction and the second direction are opposite. The feeding component and the cutting component in the nozzle share a driving component, and the driving component can drive the feeding component to feed materials and drive the cutting component to cut materials, thereby reducing the number of driving components used and reducing the manufacturing cost of the 3D printing nozzle with a cutting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a 3D printing nozzle with a cutting function in an embodiment of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the bracket, the driving member and the cutting assembly in the embodiment of the utility model;

[0028] Figure 3 It is a structural schematic diagram of the bracket, the driving member and the feeding assembly in the embodiment of the utility model;

[0029] Figure 4 It is a schematic diagram of the structure of the bracket, the nozzle assembly and the heating assembly in the embodiment of the utility model.

[0030] In the figure:

[0031] 1. bracket; 11. first inclined surface;

[0032] 2. Driving parts;

[0033] 3. Feeding assembly; 31. Feeding wheel; 32. Rotating wheel; 33. Adjusting seat; 331. Second through hole; 34. Adjusting bolt; 35. Elastic member; 36. Feeding pipe; 37. Third transmission wheel; 38. Fourth transmission wheel;

[0034] 4. nozzle assembly; 41. throat; 42. nozzle;

[0035] 5. Heating assembly; 51. Mounting block; 52. Heating rod; 53. Temperature sensor;

[0036] 6. Cutting-off assembly; 61. First driving wheel; 62. Second driving wheel; 63. One-way driving member; 64. Knife shaft; 641. Transmission shaft; 6411. First convex portion; 642. Sleeve; 6421. Driving portion; 6422. First through hole; 6423. Accommodating cavity; 643. Return spring; 65. Blade;

[0037] 7. Heat dissipating member. Detailed implementation manners

[0038] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the present utility model are shown in the drawings rather than all the structures.

[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0042] Continuous fiber composite materials are widely used in 3D printing technology as a source of printing wire materials due to their own characteristics of high strength, high stiffness, and light weight. However, due to the excellent properties of the material itself, the wire materials cannot be easily broken during the printing process, which brings other problems. When the 3D printing nozzle encounters a path breakpoint and needs to jump, it is easy to produce tangled wires and wire drawing. That is, when the 3D printing nozzle pauses printing from one printing point and moves to another printing point to start printing, the filamentary wire material is not broken and moves with the 3D printing nozzle. During the movement, the wire material will be attached to the printing plane in a disordered manner, which will affect the subsequent printing quality of the printed object. At present, for 3D printing nozzles that use continuous fiber composite materials as printing wire materials, a shearing mechanism is generally added to the original basis. When the 3D printing nozzle jumps, the shearing mechanism is used to cut the printing wire material in time, thereby avoiding tangled wires and wire drawing. However, in the current prior art, an independent driving device is provided to drive the shearing mechanism, which has an additional driving device compared to the original 3D printing nozzle, thereby increasing the manufacturing cost of the 3D printing nozzle.

[0043] In this regard, the present embodiment provides a 3D printing nozzle with a cutting function to solve the above problem. The nozzle is simultaneously connected to the feeding component 3 and the cutting component 6 through the driving member 2, and the driving member 2 is used to realize both the feeding function of the feeding component 3 and the cutting function of the cutting component 6, thereby reducing the production cost of the 3D printing nozzle with a cutting function, and when the driving member 2 drives the cutting component 6 to cut the material, the driving member 2 also drives the feeding component 3 to reverse and pull the wire back, further avoiding the phenomenon of tangled wires and wire drawing when the nozzle jumps.

[0044] For details, please refer to Figures 1 to 4As shown, the 3D printing nozzle with cutting function includes a bracket 1, a driving member 2, a feeding assembly 3, a nozzle assembly 4, a heating assembly 5 and a cutting assembly 6. The driving member 2 is arranged on the bracket 1; the feeding assembly 3 includes a feeding wheel 31 drivingly connected to the driving member 2, and a rotating wheel 32 rotatably connected to the bracket 1, the feeding wheel 31 and the rotating wheel 32 can clamp the wire together, and the driving member 2 is used to drive the feeding wheel 31 to rotate; the nozzle assembly 4 is arranged on the bracket 1, one end of the nozzle assembly 4 is used for the wire to enter and the other end is used for extruding the wire; the heating assembly 5 is arranged on the nozzle assembly 4, and the heating assembly 5 is used to heat the nozzle assembly 4; the cutting assembly 6 includes a first transmission wheel 61 drivingly connected to the driving member 2, and a second transmission wheel meshing with the first transmission wheel 61 62, a one-way transmission member 63, a knife shaft 64, and a blade 65 connected to one end of the knife shaft 64, the one-way transmission member 63 is connected between the second transmission wheel 62 and the knife shaft 64, and the one-way transmission member 63 is configured so that when the second transmission wheel 62 rotates along the first direction, the one-way transmission member 63 disconnects the transmission connection between the second transmission wheel 62 and the knife shaft 64; when the second transmission wheel 62 rotates along the second direction, the one-way transmission member 63 connects the second transmission wheel 62 and the knife shaft 64 and the knife shaft 64 drives the blade 65 to rotate and is used to cut the wire, and the first direction and the second direction are opposite.

[0045] In this embodiment, the driving member 2 is simultaneously drivingly connected to the feeding wheel 31 in the feeding assembly 3 and the first driving wheel 61 in the cutting assembly. The first driving wheel 61 meshes with the second driving wheel 62. A one-way driving member 63 is connected between the second driving wheel 62 and the tool shaft 64. The tool shaft 64 is rotatably arranged on the bracket 1. When the driving member 2 rotates forward to drive the feeding wheel 31 to rotate and feed the wire together with the rotating wheel 32, the wire enters the nozzle assembly 4 and is heated to a molten state by the heating assembly 5. The nozzle assembly 4 extrudes the molten wire. At the same time, the driving member 2 also drives the first driving wheel 61 to rotate and drives the second driving wheel 62 to rotate along the first direction. However, the one-way driving member 63 connected between the second driving wheel 62 and the tool shaft 64 disconnects the driving connection between the second driving wheel 62 and the tool shaft 64, so that the tool shaft 64 cannot rotate, and thus the blade 65 cannot rotate either. The 3D printing nozzle head can normally perform modeling printing. When the driving member 2 rotates reversely to drive the feeding wheel 31 to rotate and retract the wire together with the rotating wheel 32, the driving member 2 also drives the first driving wheel 61 to rotate and drives the second driving wheel 62 to rotate along the second direction. At this time, the one-way driving member 63 connects the second driving wheel 62 and the tool shaft 64 in a driving manner, so that the tool shaft 64 can rotate and drive the blade 65 to rotate to cut the wire extruded from the nozzle assembly 4, thereby avoiding phenomena such as wire entanglement and wire drawing caused by the movement of the wire extruded during the jump of the 3D printing nozzle head. By using one driving member 2, both the feeding function and the wire cutting function can be realized, thereby reducing the number of driving devices used in the 3D printing nozzle head with a cutting function, and thus reducing the manufacturing cost of the 3D printing nozzle head. And when the feeding wheel 31 and the rotating wheel 32 retract the wire together, the mass of the wire accumulated in the nozzle assembly 4 can also be reduced, preventing the wire from dripping along the nozzle assembly 4 under the action of gravity, and further avoiding phenomena such as wire entanglement and wire drawing during the jump of the 3D printing nozzle head. When the driving member 2 rotates reversely, it can not only drive the blade 65 to rotate and cut the wire, but also retract the wire to reduce the residual wire in the nozzle assembly 4. In this way, on the basis of reducing the manufacturing cost of the 3D printing nozzle head, it also has the function of preventing dripping after cutting.

[0046] In this embodiment, the one-way driving member 63 is a one-way bearing. By utilizing the characteristic that the one-way bearing only allows free rotation in one direction and locks in the other direction, the one-way rotation of the tool shaft 64 is realized. In other embodiments, the one-way driving member 63 can also be a clutch. By utilizing the function of the clutch to cut off or transmit the rotational power input from the driving member 2 to the tool shaft 64, the one-way rotation of the tool shaft 64 is realized. In this embodiment, the driving member 2 is a stepping motor.

[0047] Optionally, as Figure 1 and Figure 2As shown, the tool shaft 64 further includes a transmission shaft 641 and a sleeve 642. The one-way transmission member 63 is connected between the second transmission wheel 62 and the transmission shaft 641. The transmission shaft 641 is slidably connected to the sleeve 642 and is restricted from relative rotation. The blade 65 is connected to one end of the sleeve 642 away from the transmission shaft 641. A first inclined surface 11 is provided at the bottom of the bracket 1. The sleeve 642 is further provided with a driving portion 6421. The driving portion 6421 abuts against the first inclined surface 11. The sleeve 642 is configured such that when the transmission shaft 641 rotates, the sleeve 642 rotates and moves along the axis direction of the transmission shaft 641.

[0048] Specifically, in this embodiment, when the driving member 2 rotates forward, the blade 65 is located at the initial position diagonally above the wire extruded from the nozzle assembly 4. The blade 65 at the initial position will not affect the printing process during the printing of this 3D printing nozzle. When the driving member 2 rotates in reverse, the transmission shaft 641 is driven to rotate by the second transmission wheel 62 rotating in the second direction, and then the sleeve 642 can be driven to rotate. When the sleeve 642 rotates in the second direction, the driving portion 6421 abuts against the first inclined surface 11, so that the sleeve 642 can simultaneously move downward along the axis direction of the transmission shaft 641, thereby driving the blade 65 to gradually approach the wire extruded from the nozzle assembly 4 and rotate to cut the wire. After the blade 65 cuts the wire, the sleeve 642 continues to rotate with the transmission shaft 641, and at the same time, the sleeve 642 will move upward along the axis direction of the transmission shaft 641, so that the blade 65 returns to the initial position. In this way, a complete cutting process is completed.

[0049] Further, as Figure 1 and Figure 2 shown, a first through hole 6422 is formed in the side wall of the sleeve 642, and a receiving cavity 6423 is formed in the sleeve 642. The first through hole 6422 communicates with the receiving cavity 6423. The transmission shaft 641 is inserted into the receiving cavity 6423. The transmission shaft 641 includes a first convex portion 6411, and the first convex portion 6411 passes through the first through hole 6422. The tool shaft 64 further includes a return spring 643. The return spring 643 is located in the receiving cavity 6423 and sleeved on the transmission shaft 641. One end of the return spring 643 abuts against the sleeve 642, and the other end of the return spring 643 abuts against the first convex portion 6411.

[0050] Specifically, in this embodiment, the moving stroke of the blade 65 is the opening length of the first through hole 6422. The transmission shaft 641 only rotates but does not move. Therefore, the return spring 643 located in the accommodation cavity 6423 will be compressed. During the movement of the sleeve 642, the blade 65 gradually approaches the wire extruded from the nozzle assembly 4 and rotates to cut the wire. After cutting the wire, the driving member 2 continues to rotate. The driving portion 6421 of the sleeve 642 still abuts against the first inclined surface 11. At this time, the return spring 643 uses elastic deformation to push the sleeve 642 to move upward along the axis of the transmission shaft 641. At the same time, the sleeve 642 is also rotating, thereby driving the blade 65 to gradually move away from the nozzle assembly 4 and return to the initial position, without affecting the subsequent printing process.

[0051] As an alternative solution, it can also be that a groove is formed on the inner wall of the sleeve 642, and the first convex portion 6411 abuts in the groove. When the transmission shaft 641 rotates, the sleeve 642 is driven to rotate by the first convex portion 6411 abutting in the groove. At the same time, in cooperation with the abutment of the first inclined surface 11 and the driving portion 6421, the sleeve 642 can also be driven to move downward along the axis of the transmission shaft 641. Then, under the action of the elastic deformation of the return spring 643, the sleeve 642 moves upward along the axis of the transmission shaft 641, thereby completing the cutting process. The groove length is the moving stroke of the blade 65.

[0052] As another alternative solution, the part of the transmission shaft 641 below the first inclined surface 11 can be designed as a reciprocating lead screw, and the blade 65 is sleeved on the reciprocating lead screw and threadedly connected to the reciprocating lead screw. In this way, when the transmission shaft 641 rotates, the blade 65 can be driven to rotate with the transmission shaft 641 and can also reciprocate between the initial position and the position where the wire is extruded from the nozzle assembly 4, thereby completing the cutting process. The effective length of the reciprocating lead screw is the moving stroke of the blade 65.

[0053] Optionally, as Figure 1 and Figure 2 shown, both the first transmission wheel 61 and the second transmission wheel 62 are helical gears. Specifically, in this embodiment, both the first transmission wheel 61 and the second transmission wheel 62 are 90-degree crossed helical gears. With such a setting, the axis of the output shaft of the driving member 2 and the axis of the tool shaft 64 are 90 degrees crossed, changing the direction of force transmission. Furthermore, the axis direction of the tool shaft 64 is consistent with the feeding direction of the wire, thereby making the structure of the nozzle more compact and reducing the overall volume. In other embodiments, the first transmission wheel 61 and the second transmission wheel 62 can also be bevel gears. With such a setting, the axis of the output shaft of the driving member 2 and the axis of the tool shaft 64 are 90 degrees intersecting, also changing the direction of force transmission. Furthermore, the axis of the tool shaft 64 can also be made consistent with the feeding direction of the wire.

[0054] Optionally, as Figure 1 and Figure 3 shown, the feeding assembly 6 further includes a third driving wheel 37 and a fourth driving wheel 38. The driving member 2 is in transmission connection with the third driving wheel 37. The fourth driving wheel 38 meshes with the third driving wheel 37, and the fourth driving wheel 38 is in transmission connection with the feeding wheel 31. Specifically, in this embodiment, the driving member 2 is directly in transmission connection with the first driving wheel 61 and the third driving wheel 37, and the diameter of the third driving wheel 37 is smaller than that of the fourth driving wheel 38, so as to increase the torque on the feeding wheel 31. In other embodiments, the driving member 2 may also be directly in transmission connection with the feeding wheel 31 and the fourth driving wheel 38. And by setting the third driving wheel 37 and the fourth driving wheel 38, the spatial positions of the first driving wheel 61 and the feeding wheel 31 can be changed, the linear distance from the axis of the tool shaft 64 to the axis of the wire can be shortened, and then the overall length of the blade 65 does not need to be too long, so that the force on the blade 65 is better, and it is more beneficial for the blade 65 to cut the wire.

[0055] Optionally, as Figure 3 and Figure 4 shown, the nozzle assembly 4 includes a throat 41 and a nozzle 42. The throat 41 is connected to the bracket 1. The throat 41 communicates with the nozzle 42. The throat 41 is for the wire to pass through. The heating assembly 5 is arranged on the nozzle 42 and is used to heat the nozzle 42. The nozzle 42 is used to extrude the molten wire, and the wire enters the nozzle 42 through the throat 41.

[0056] Further, as Figure 4 shown, the heating assembly 5 includes a mounting block 51 and a heating rod 52. The mounting block 51 is sleeved on the nozzle 42, and the heating rod 52 is arranged on the mounting block 51 and is used to heat the nozzle 42. Specifically, the mounting block 51 is sleeved on the nozzle 42. The mounting block 51 has good heat conduction performance, and can evenly transfer the heat of the heating rod 52 to the nozzle 42, so that the wire in the nozzle 42 is heated evenly, which is more conducive to heating the wire to the molten state.

[0057] Further, as Figure 4 shown, the heating assembly 5 further includes a temperature sensor 53. The temperature sensor 53 is arranged on the mounting block 51. The temperature sensor 53 is used to measure the heating temperature and control the heating temperature in real time to prevent the heating temperature from being abnormal. In this embodiment, the temperature sensor 53 is specifically a thermocouple. In other embodiments, the temperature sensor 53 may be a thermistor.

[0058] Further, as Figure 4As shown, the 3D printing nozzle with a cutting function further includes a heat dissipation member 7. The heat dissipation member 7 is located between the bracket 1 and the heating assembly 5. The heat dissipation member 7 is sleeved on the throat pipe 41 and is used to cool the wire. Since the heat dissipation member 7 is located between the bracket 1 and the heating assembly 5, when the heating assembly 5 heats the nozzle 42, the heat will be transferred to the throat pipe 41 through the nozzle 42. Therefore, the heat dissipation member 7 can be used to control the temperature in the throat pipe 41, so that the wire can maintain a certain toughness and enter the nozzle 42, avoiding the wire in the throat pipe 41 from melting and blocking the throat pipe 41.

[0059] Optionally, as Figure 3 shown, the feeding assembly 3 further includes an adjusting seat 33, an adjusting bolt 34 and an elastic member 35. The rotating wheel 32 is rotatably connected to the adjusting seat 33. One end of the adjusting seat 33 is movably arranged on the bracket 1. A second through hole 331 is opened at the other end of the adjusting seat 33. The adjusting bolt 34 passes through the second through hole 331 and is threadedly connected to the bracket 1. The elastic member 35 is located between the bracket 1 and the adjusting seat 33 and is sleeved on the adjusting bolt 34. In this embodiment, when the end of the adjusting seat 33 located at the adjusting bolt 34 is extruded and the adjusting seat 33 rotates clockwise around the bracket 1, the rotating wheel 32 also rotates clockwise with the adjusting seat 33. At this time, the rotating wheel 32 moves away from the feeding wheel 31. After the adjusting seat 33 is released, under the elastic deformation of the elastic member 35, the adjusting seat 33 rotates counterclockwise around the bracket 1, and the rotating wheel 32 also rotates counterclockwise. At this time, the rotating wheel 32 approaches the feeding wheel 31, so that the feeding wheel 31 and the rotating wheel 32 clamp the wire together. The clamping force of the clamped wire can be adjusted by screwing the adjusting bolt 34. In this embodiment, the elastic member 35 is specifically a compression spring.

[0060] As an alternative solution, a sliding groove can be opened on the bracket 1. One end of the adjusting seat 33 is provided with a sliding block, and the sliding block is slidably connected to the sliding groove. The other end of the adjusting seat 33 is bolted to the bracket 1 through the adjusting bolt 34. By screwing the adjusting bolt 34, the adjusting seat 33 slides along the sliding groove on the bracket 1, so as to change the distance between the rotating wheel 32 and the feeding wheel 31, thereby adjusting the clamping force. In other embodiments, a sliding groove can also be opened on the adjusting seat 33, and a sliding block can be arranged on the bracket 1.

[0061] Optionally, as Figure 3 shown, the feeding assembly 3 further includes a feeding pipe 36. The feeding pipe 36 is connected to the bracket 1 and is vertically spaced directly above the gap between the feeding wheel 31 and the rotating wheel 32. The feeding pipe 36 is used for the wire to pass through. Such a setting can protect the wire and guide the wire, so that the wire moves more smoothly between the feeding wheel 31 and the rotating wheel 32.

[0062] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A 3D printing nozzle with a cutting function, characterized in that: include: Bracket (1); A driving member (2) is arranged on the bracket (1); A feeding assembly (3), comprising a feeding wheel (31) drivingly connected to the driving member (2), and a rotating wheel (32) rotatably connected to the bracket (1), wherein the feeding wheel (31) and the rotating wheel (32) can clamp the wire together, and the driving member (2) is used to drive the feeding wheel (31) to rotate; A nozzle assembly (4) is arranged on the support (1), one end of the nozzle assembly (4) is used for the wire to enter and the other end is used for extruding the wire; A heating component (5) is arranged on the nozzle component (4), and the heating component (5) is used to heat the nozzle component (4); The cutting assembly (6) comprises a first transmission wheel (61) transmission-connected to the driving member (2), a second transmission wheel (62) meshing with the first transmission wheel (61), a one-way transmission member (63), a knife shaft (64), and a blade (65) connected to one end of the knife shaft (64), wherein the one-way transmission member (63) is connected between the second transmission wheel (62) and the knife shaft (64), and the one-way transmission member (63) is configured such that when the second transmission wheel (62) rotates in a first direction, the one-way transmission member (63) disconnects the transmission connection between the second transmission wheel (62) and the knife shaft (64), and when the second transmission wheel (62) rotates in a second direction, the one-way transmission member (63) transmission-connects the second transmission wheel (62) and the knife shaft (64), and the knife shaft (64) drives the blade (65) to rotate and is used to cut the wire, and the first direction and the second direction are opposite.

2. A 3D printing nozzle with a cutting function according to claim 1, characterized in that: The blade shaft (64) further comprises a transmission shaft (641) and a sleeve (642); the one-way transmission member (63) is connected between the second transmission wheel (62) and the transmission shaft (641); the transmission shaft (641) and the sleeve (642) are slidably connected and limited in relative rotation; the blade (65) is connected to one end of the sleeve (642) away from the transmission shaft (641); The bracket (1) is provided with a first inclined surface (11) at the bottom, and the sleeve (642) is also provided with a driving portion (6421), the driving portion (6421) abuts against the first inclined surface (11), and the sleeve (642) is configured to rotate and move along the axial direction of the transmission shaft (641) when the transmission shaft (641) rotates.

3. A 3D printing nozzle with a cutting function according to claim 2, characterized in that: The side wall of the sleeve (642) is provided with a first through hole (6422), and a receiving cavity (6423) is provided in the sleeve (642). The first through hole (6422) is communicated with the receiving cavity (6423), and the transmission shaft (641) is inserted into the receiving cavity (6423). The transmission shaft (641) includes a first convex portion (6411), and the first convex portion (6411) is passed through the first through hole (6422); The knife shaft (64) also includes a return spring (643), which is located in the accommodating cavity (6423) and is sleeved on the transmission shaft (641), one end of the return spring (643) abuts against the sleeve (642), and the other end of the return spring (643) abuts against the first protrusion (6411).

4. The 3D printing nozzle with a cutting function according to claim 1, characterized in that: The first transmission wheel (61) and the second transmission wheel (62) are both helical gears.

5. The 3D printing nozzle with a cutting function according to claim 1, characterized in that: The feeding assembly (3) further comprises a third transmission wheel (37) and a fourth transmission wheel (38); the driving member (2) is in transmission connection with the third transmission wheel (37); the fourth transmission wheel (38) is meshed with the third transmission wheel (37); and the fourth transmission wheel (38) is in transmission connection with the feeding wheel (31).

6. The 3D printing nozzle with a cutting function according to claim 1, characterized in that: The nozzle assembly (4) comprises a throat (41) and a nozzle (42); the throat (41) is connected to the support (1); the throat (41) is in communication with the nozzle (42); the throat (41) is used for the wire to pass through; the heating assembly (5) is arranged on the nozzle (42) and is used for heating the nozzle (42); the nozzle (42) is used for extruding the molten wire.

7. The 3D printing nozzle with a cutting function according to claim 6, characterized in that: The heating assembly (5) comprises a mounting block (51) and a heating rod (52); the mounting block (51) is sleeved on the nozzle (42); the heating rod (52) is arranged on the mounting block (51) and is used to heat the nozzle (42).

8. The 3D printing nozzle with a cutting function according to claim 7, characterized in that: The heating component (5) further comprises a temperature sensor (53), wherein the temperature sensor (53) is arranged on the mounting block (51), and the temperature sensor (53) is used to measure the heating temperature.

9. A 3D printing nozzle with a cutting function according to any one of claims 1 to 8, characterized in that: The feeding assembly (3) further comprises an adjusting seat (33), an adjusting bolt (34) and an elastic member (35); the rotating wheel (32) is rotatably connected to the adjusting seat (33); one end of the adjusting seat (33) is movably arranged on the bracket (1); a second through hole (331) is provided on the other end of the adjusting seat (33); the adjusting bolt (34) passes through the second through hole (331) and is threadedly connected to the bracket (1); the elastic member (35) is located between the bracket (1) and the adjusting seat (33) and is sleeved on the adjusting bolt (34).

10. A 3D printing nozzle with a cutting function according to any one of claims 1 to 8, characterized in that: The feeding assembly (3) further comprises a feeding pipe (36), which is connected to the bracket (1) and is located vertically just above the gap between the feeding wheel (31) and the rotating wheel (32), and is used for the wire to pass through.

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