Far-end and near-end integrated 3D printing head of fused deposition modeling 3D printer

Abstract

The invention belongs to the technical field of additive manufacturing, and relates to a far-end and near-end integrated 3D printing head of a fused deposition modeling 3D printer, which comprises a power supply module and an integrated printing mechanism mounted at the front end of the power supply module, and further comprises a cooling assembly arranged at the rear end of the power supply module, the cooling assembly comprises a mounting base fixedly connected to the side, away from the integrated printing mechanism, of the power module, a protective cover is arranged on the side, away from the power module, of the mounting base, a cross-shaped mounting frame is fixedly connected to the inner wall face of the mounting base, and a mounting shaft is fixedly connected to the center of the cross-shaped mounting frame. A fan is connected to the mounting shaft in a sliding manner; the device can achieve a stable and efficient cooling function, various part forms such as planes, curved surfaces and hollows are attached through angle adjustment, airflow accurately covers all forming points, insufficient local cooling or excessive cooling is avoided, parts of different sizes are matched through position adjustment, and the cooling range is controlled.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of additive manufacturing technology, and particularly relates to a far-end and near-end integrated 3D printing head of a fused deposition modeling 3D printer. BACKGROUND

[0002] The basic principle of a desktop 3D printer based on a fused deposition modeling method (FDM) is as follows: a heating nozzle of the printer is controlled by a computer to make planar motion according to horizontal layering data, a wire material is sent to the nozzle by a wire feeding mechanism, is heated and melted, is extruded from the nozzle to be bonded to a workbench, is then quickly cooled and solidified, and after each cross section is completed, the workbench is lowered by a certain height, and then the modeling of the next layer is started, and the above process is repeated until the modeling of the entire entity is completed.

[0003] The cooling system of a traditional printing head has the following disadvantages: the fan and the air deflector are usually rigidly fixed on the shell by screws, the air direction cannot be adjusted, the air flow can only be blown out in a single direction, and the air flow is difficult to adapt to the printing requirements of different structures: when a planar part is printed, the air flow is difficult to cover the edge area, and warping is likely to occur; when a part with a curved surface or a hollow part is printed, the external structure will block the air flow, resulting in insufficient cooling of the internal modeling area, and the interlayer bonding strength is reduced; at the same time, the fixed-direction air flow will inevitably blow directly on the material that has not completely solidified, forming "air flow marks" or depressions on the surface, and increasing the workload of subsequent finishing.

[0004] Therefore, it is urgent to design a far-end and near-end integrated 3D printing head of a fused deposition modeling 3D printer to solve the above problems. SUMMARY

[0005] To solve the problems proposed in the background, the present application provides a far-end and near-end integrated 3D printing head of a fused deposition modeling 3D printer, which can realize stable and efficient cooling function, and can be adjusted in angle to fit with planar, curved, hollow and other parts, so that the air flow can accurately cover each modeling point, and local insufficient cooling or excessive cooling can be avoided; the position can be adjusted to match parts of different sizes, the cooling range can be controlled, and the problem that the fixed air direction cannot adapt to complex structures can be solved.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a far-end and near-end integrated 3D printing head of a fused deposition modeling 3D printer, comprising a power module and an integrated printing mechanism installed at the front end of the power module, and further comprising a cooling assembly arranged at the rear end of the power module; The cooling assembly comprises a mounting seat fixedly connected to the side of the power module away from the integrated printing mechanism, a protective cover arranged on the side of the mounting seat away from the power module, a cross-shaped mounting bracket fixedly connected to the inner wall surface of the mounting seat, an installation shaft fixedly connected to the central position of the cross-shaped mounting bracket, and a fan slidably connected to the installation shaft.

[0007] Preferably, the protective cover is uniformly and fixedly connected with three groups of clamping blocks around, and the inner side of the mounting seat is provided with L-shaped clamping grooves matched with the clamping blocks.

[0008] Preferably, the protective cover is a hollow circular truncated cone structure, and is made of ABS plastic material, and the hollow part of the protective cover is provided with a streamlined wind barrier rib.

[0009] Preferably, the far-and-near-end integrated 3D printing head of the fused deposition modeling 3D printer further comprises a wind guide cover plate assembly arranged on the side of the mounting seat away from the power module. The wind guide cover plate assembly comprises a wind guide cover plate A, the side of the mounting seat away from the power module is provided with a cover plate support connecting arm, the top end of the cover plate support connecting arm is fixedly and symmetrically connected with a support arm hinged seat, the top end of the wind guide cover plate A is fixedly and symmetrically connected with a cover plate hinged connecting shaft, and the support arm hinged seat is rotationally connected with the cover plate hinged connecting shaft.

[0010] Preferably, the side of the mounting seat away from the power module is provided with a cover plate support arm sliding groove matched with the cover plate support connecting arm.

[0011] Preferably, a damping bearing is arranged between the support arm hinged seat and the cover plate hinged connecting shaft.

[0012] Preferably, the far-and-near-end integrated 3D printing head of the fused deposition modeling 3D printer further comprises an elastic positioning assembly arranged in the mounting seat. The elastic positioning assembly comprises an annular sliding base fixedly connected to the bottom end of the cover plate support connecting arm, and the inner side of the mounting seat is provided with an annular positioning groove matched with the annular sliding base.

[0013] Preferably, the inner side of the mounting seat is provided with a clamping tooth block sliding groove, and the inner side of the mounting seat is provided with an elastic positioning clamping tooth block matched with the clamping tooth block sliding groove, the elastic positioning clamping tooth block slides in the inner side of the mounting seat through the annular sliding base, the bottom end of the elastic positioning clamping tooth block is fixedly connected with a positioning return spring, the other end of the positioning return spring is fixedly connected with the mounting seat through the clamping tooth block sliding groove, and the bottom end of the annular positioning groove is provided with a clamping tooth matched tooth groove matched with the elastic positioning clamping tooth block.

[0014] Preferably, the elastic positioning clamping blocks, the positioning reset springs and the clamping tooth matching tooth grooves are arranged in a ring array inside the mounting seat with the shaft center of the annular positioning groove as the center.

[0015] Compared with the prior art, the present application has the following advantages: 1. By setting the fan that can slide along the mounting shaft, the adjustment of the cooling airflow injection distance is realized, which can adapt to different sizes of printed parts and solve the problem of excessive cooling at the near end and insufficient cooling at the far end during the printing of large parts.

[0016] 2. By setting the angle-adjustable air guide cover plate assembly, the airflow direction can be accurately adjusted according to the geometric shape of the printed part, avoiding airflow obstruction or direct impact on the unformed surface, effectively preventing warping, poor interlayer adhesion and surface defects.

[0017] 3. By adjusting the combination of fan position and air guide plate angle, the specific cooling strength requirements of different materials can be flexibly matched, realizing accurate control of strong cooling or weak cooling and significantly reducing material printing scrap rate.

[0018] 4. By designing the elastic positioning assembly and damping bearing, the angle adjustment has flexibility and stability, and the position can be reliably maintained, ensuring the stability of the printing process.

[0019] 5. The protective cover adopts a buckle design, which is convenient for disassembly and maintenance, and the streamlined wind deflector reduces wind resistance while protecting the fan. DETAILED DESCRIPTION

[0020] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figure 1 is the overall schematic diagram of the present application; Figure 2 is a structural schematic diagram of the protective cover in the present application; Figure 3 is a structural schematic diagram of the fan in the present application; Figure 4 is a structural schematic diagram of the air guide cover plate A in the present application; Figure 5 is a structural schematic diagram of the annular sliding base in the present application; In the drawings: 1. Power module; 2. Integrated printing mechanism; 3, cooling assembly; 31, mounting seat; 32, protective cover; 33, cross-shaped mounting bracket; 34, mounting shaft; 35, fan; 36, clamping block; 37, L-shaped clamping groove; 4, air guide cover plate assembly; 41, air guide cover plate A; 42, cover plate support connecting arm; 43, support arm hinged seat; 44, cover plate hinged connecting shaft; 45, cover plate support arm sliding groove; 5, elastic positioning assembly; 51, annular sliding base; 52, annular positioning groove; 53, clamping tooth block sliding groove; 54, elastic positioning clamping tooth block; 55, positioning return spring; 56, clamping tooth matching tooth groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Embodiment 1

[0023] As shown in the drawings; Figure 1 As shown in the drawings; The embodiment is a far and near integrated 3D printing head of a fused deposition modeling 3D printer, which comprises a power module 1 and an integrated printing mechanism 2 mounted at the front end of the power module 1.

[0024] The fan and the air guide plate of the conventional printing head are rigidly fixed on the printing head shell by screws, and the air direction angle is not adjustable. This design causes the airflow to be ejected in a single direction only, which cannot be adapted to different part structures: when printing a planar part, the edge is prone to warping due to insufficient airflow coverage; when printing a curved surface or a hollow part, the airflow is blocked by the outer wall, and the internal forming area is prone to poor interlayer adhesion due to insufficient cooling. At the same time, fixed air direction cannot avoid direct impact on the unformed material, which is prone to cause surface "airflow marks" or depressions, increasing the polishing cost in the later stage. In addition, different printing materials have significant differences in cooling intensity requirements: low-shrinkage materials such as PLA require weak cooling, and excessive cooling will cause interlayer cracking, while high-shrinkage materials such as ABS require strong cooling, and insufficient cooling will cause warping. However, the fan position of the conventional cooling system is fixed, and the cooling range and intensity cannot be adjusted. When printing different materials using the same cooling parameters, PLA is prone to interlayer cracking due to overcooling, and ABS is prone to warping due to insufficient cooling. In addition, the fixed cooling range cannot cover the full size when printing large parts, which is prone to the phenomenon of uneven cooling, i.e., "excessive cooling at the near end and insufficient cooling at the far end".

[0025] To solve this technical problem, the embodiment adds a cooling assembly 3, an air guide cover plate assembly 4, and an elastic positioning assembly 5.

[0026] As Figures 1 to 5 shown: this embodiment includes a cooling assembly 3 arranged at the rear end of the power module 1; The cooling assembly 3 includes a mounting seat 31 fixedly connected to the power module 1 away from the integrated printing mechanism 2, the mounting seat 31 is provided with a protective cover 32 away from the power module 1, the inner wall surface of the mounting seat 31 is fixedly connected with a cross-shaped mounting bracket 33, the central position of the cross-shaped mounting bracket 33 is fixedly connected with a mounting shaft 34, and a fan 35 is slidingly connected to the mounting shaft 34.

[0027] The power module 1 is integrally powered, the integrated printing mechanism 2 performs the printing core action of material melting and extrusion, the cooling assembly 3 bears the cooling function, in the cooling assembly 3, the mounting seat 31 is fixed to the surface of the power module 1 as the bearing basis of the cooling component, the protective cover 32 is arranged on the surface of the mounting seat 31, the cross-shaped mounting bracket 33 is fixed to the inner surface of the mounting seat 31 to provide support for the mounting shaft 34, the mounting shaft 34 is fixed to the surface of the cross-shaped mounting bracket 33, and the fan 35 is arranged on the surface of the mounting shaft 34. The fan 35 rotates to generate airflow to achieve cooling, the fan 35 and the mounting shaft 34 are slidingly connected, and during installation, the fan 35 can be pushed into the mounting shaft 34 along the axial direction to be matched in place, and during disassembly, the fan 35 can be pulled out in the reverse direction along the axial direction, thereby simplifying the disassembly process of the fan 35, quickly replacing or repairing the fan 35, and improving the maintenance efficiency.

[0028] As Figure 3 shown: the protective cover 32 is uniformly fixedly connected with three groups of clamping blocks 36 around, and the inner side of the mounting seat 31 is provided with L-shaped clamping grooves 37 matched with the clamping blocks 36.

[0029] In this embodiment: the three groups of clamping blocks 36 on the surface of the protective cover 32 are matched with the L-shaped clamping grooves 37 on the surface of the mounting seat 31, during installation, the clamping blocks 36 are inserted into the entrances of the L-shaped clamping grooves 37 and then rotated, so that the clamping blocks 36 are clamped into the limiting positions of the L-shaped clamping grooves 37, the quick clamping and fixing of the protective cover 32 and the mounting seat 31 are realized, the quick installation and disassembly of the protective cover 32 are facilitated, and the maintenance and cleaning of the internal components of the protective cover 32 are facilitated, thereby improving the maintenance convenience.

[0030] As Figure 3 shown: the protective cover 32 is a hollow circular truncated cone structure, and the protective cover 32 is made of glass fiber reinforced high-temperature-resistant ABS plastic material, and preferably a flow line type wind barrier rib is arranged at the hollow part of the protective cover 32.

[0031] In this embodiment: the protective cover 32 is a hollow circular truncated cone structure made of glass fiber reinforced high temperature resistant ABS plastic material, which ensures the reliability of its working temperature resistance; the airflow generated by the fan 35 can flow out through the hollow part, and the streamlined wind-blocking ribs in the hollow part guide the airflow to flow to the target cooling area, which not only protects the fan 35, but also reduces airflow resistance and improves cooling efficiency. The ABS plastic makes the protective cover 32 lightweight, reducing structural load, and the streamlined wind-blocking ribs optimize airflow direction, making cooling more accurate and efficient.

[0032] As shown in Figures 2 to 4 : including the air guide cover plate assembly 4 arranged on the side of the mounting seat 31 away from the power module 1; the air guide cover plate assembly 4 includes an air guide cover plate A41, and the mounting seat 31 is provided with a cover plate support connecting arm 42 on the side away from the power module 1, the top ends of the cover plate support connecting arm 42 are symmetrically fixedly connected with support arm hinge seats 43, the top ends of the air guide cover plate A41 are symmetrically fixedly connected with cover plate hinge connecting shafts 44, and the support arm hinge seats 43 are rotationally connected with the cover plate hinge connecting shafts 44.

[0033] The air guide cover plate assembly 4 guides the cooling airflow, the air guide cover plate A41 is rotationally connected with the support arm hinge seats 43 through the cover plate hinge connecting shafts 44, the support arm hinge seats 43 are fixed on the surface of the cover plate support connecting arm 42, the cover plate support connecting arm 42 is arranged on the surface of the mounting seat 31, and the air guide cover plate A41 is rotated to adjust the angle to change the airflow direction when working, so that the airflow accurately acts on the printing area, and the air guide cover plate A41 can be rotated to cover the surface of the protective cover 32 to achieve dust prevention when the equipment is not in use.

[0034] As shown in Figure 4 : the mounting seat 31 is provided with a cover plate support arm sliding groove 45 matched with the cover plate support connecting arm 42 on the side away from the power module 1.

[0035] The cover plate support arm sliding groove 45 on the surface of the mounting seat 31 is matched with the cover plate support connecting arm 42, the cover plate support connecting arm 42 can slide along the cover plate support arm sliding groove 45, drive the air guide cover plate A41 and other components to move, adjust the position of the air guide cover plate A41 relative to the fan 35, and further improve the flexibility and accuracy of the air guide to meet the cooling needs of different printing areas.

[0036] A damping bearing is arranged between the support arm hinge seat 43 and the cover plate hinge connecting shaft 44. The damping bearing is arranged between the support arm hinge seat 43 and the cover plate hinge connecting shaft 44, and when the air guide cover plate A41 is rotated, the damping bearing provides damping force to make the air guide cover plate A41 stable after adjusting the angle and not randomly rotate due to gravity or airflow impact.

[0037] As shown in Figure 4 and Figure 5As shown: the elastic positioning assembly 5 is arranged inside the mounting seat 31; the elastic positioning assembly 5 includes a ring-shaped sliding base 51 fixedly connected to the bottom end of the cover plate support connecting arm 42, and the inside of the mounting seat 31 is provided with a ring-shaped positioning groove 52 matched with the ring-shaped sliding base 51.

[0038] The elastic positioning assembly 5 positions the air guide cover plate assembly 4, the ring-shaped sliding base 51 is fixed to the bottom end of the cover plate support connecting arm 42 and can slide in the ring-shaped positioning groove 52 on the surface of the mounting seat 31, thereby providing a track basis for the circumferential angle adjustment of the air guide cover plate A41, and the cooperation between the ring-shaped sliding base 51 and the ring-shaped positioning groove 52 enables the air guide cover plate A41 to achieve circumferential angle adjustment, expands the air guide angle adjustment range, more accurately adapts to different printing cooling requirements, and the sliding cooperation ensures smooth adjustment process.

[0039] As shown in Figure 4 and Figure 5 : the inside of the mounting seat 31 is provided with a clamping tooth block sliding groove 53, the inside of the mounting seat 31 is provided with an elastic positioning clamping tooth block 54 matched with the clamping tooth block sliding groove 53, the elastic positioning clamping tooth block 54 slides in the inside of the mounting seat 31 through the ring-shaped sliding base 51, the bottom end of the elastic positioning clamping tooth block 54 is fixedly connected with a positioning reset spring 55, the other end of the positioning reset spring 55 is fixedly connected with the mounting seat 31 through the clamping tooth block sliding groove 53, and the bottom end of the ring-shaped positioning groove 52 is provided with a clamping tooth matching tooth groove 56 matched with the elastic positioning clamping tooth block 54.

[0040] The clamping tooth block sliding groove 53 in the inside of the mounting seat 31 provides a sliding space for the elastic positioning clamping tooth block 54, the positioning reset spring 55 at the bottom end of the elastic positioning clamping tooth block 54 provides an elastic reset force, and when the ring-shaped sliding base 51 slides in the ring-shaped positioning groove 52, the elastic positioning clamping tooth block 54 is driven to slide in the clamping tooth block sliding groove 53, when the elastic positioning clamping tooth block 54 is aligned with the clamping tooth matching tooth groove 56 at the bottom end of the ring-shaped positioning groove 52, the elastic positioning clamping tooth block 54 is clamped into the clamping tooth matching tooth groove 56 to achieve positioning under the elastic force of the positioning reset spring 55, and the cooperation between the elastic positioning clamping tooth block 54, the positioning reset spring 55 and the clamping tooth matching tooth groove 56 accurately positions the circumferential position of the air guide cover plate assembly 4, ensures that the air guide cover plate A41 is stably kept after being adjusted to a specific angle, improves air guide stability, and the elastic clamping mode also facilitates repositioning.

[0041] As shown in Figure 4 and Figure 5 : the elastic positioning clamping tooth block 54, the positioning reset spring 55 and the clamping tooth matching tooth groove 56 are arranged in several groups, and the several groups of elastic positioning clamping tooth blocks 54, positioning reset springs 55 and clamping tooth matching tooth grooves 56 are arranged in a ring-shaped array in the inside of the mounting seat 31 with the axis of the ring-shaped positioning groove 52 as the center.

[0042] A plurality of elastic positioning tooth blocks 54, positioning return springs 55 and tooth block matching tooth grooves 56 are evenly distributed in a ring array with the axis of the ring positioning groove 52 as the center. When the ring sliding base 51 drives the relevant components to rotate, the elastic positioning tooth blocks 54 can be sequentially clamped with the tooth block matching tooth grooves 56 at different positions, realizing multi-angle positioning. The even distribution of the ring array enables the air deflector cover A41 to be multi-angle positioned in the circumferential direction, meeting more diversified cooling and guiding needs. The even distribution ensures balanced force in each angle positioning, improving the positioning stability and reliability.

[0043] Working principle: When the integrated printing mechanism 2 is working and the position of the air deflector cover A41 needs to be adjusted, the operator applies an external force to the cover support connecting arm 42 to push the cover support connecting arm 42 along the groove of the cover support arm sliding groove 45 on the surface of the mounting seat 31, driving the ring sliding base 51 at the bottom of the cover support connecting arm 42 to slide synchronously in the ring positioning groove 52 of the mounting seat 31. According to the position requirements of the printing area, the cover support connecting arm 42 is adjusted to the target position. During this process, the ring sliding base 51 slides in the ring positioning groove 52 along with the cover support connecting arm 42, and the ring sliding base 51 drives the elastic positioning tooth blocks 54 connected thereto to slide synchronously in the tooth block sliding groove 53 inside the mounting seat 31 along the groove. The bottom end of the elastic positioning tooth blocks 54 is connected with the positioning return springs 55. During the sliding process, the elastic positioning tooth blocks 54 will squeeze the positioning return springs 55, causing the positioning return springs 55 to shrink and deform, storing elastic potential energy. When the top end of the elastic positioning tooth blocks 54 aligns with the tooth block matching tooth groove 56 at the bottom end of the ring positioning groove 52, the positioning return springs 55 release the elastic potential energy, pushing the elastic positioning tooth blocks 54 to slide upward along the tooth block sliding groove 53 until the top end of the elastic positioning tooth blocks 54 is clamped into the tooth block matching tooth groove 56, realizing precise positioning of the circumferential position of the air deflector cover assembly 4.

[0044] If adjustment to other positions is needed, continue to rotate the cover support connecting arm 42, the elastic positioning tooth blocks 54 will be squeezed by the side wall of the tooth block matching tooth groove 56, compressing the positioning return springs 55 again and disengaging from the tooth groove. The ring sliding base 51 slides to the next set of tooth block matching tooth grooves 56, and the above clamping action is repeated. Because the elastic positioning tooth blocks 54, the positioning return springs 55 and the tooth block matching tooth grooves 56 are distributed in a ring array, multi-angle positioning can be achieved.

[0045] When the angle of the air guide cover A41 needs to be adjusted, an operator applies an external force to the air guide cover A41, which synchronously rotates the cover hinged connection shaft 44 on the surface of the air guide cover A41, and the cover hinged connection shaft 44 is rotationally connected with the support arm hinge seat 43 on the surface of the cover support connecting arm 42. Since the damping bearing is arranged between the support arm hinge seat 43 and the cover hinged connection shaft 44, the damping bearing provides uniform damping force during rotation. When the air guide cover A41 is adjusted to the target angle, such as the forming area below the print head, the damping bearing can prevent the air guide cover A41 from being randomly rotated due to gravity or air flow impact after the hand is released, thereby achieving temporary angle fixation.

[0046] When the protective cover 32 or the components inside the protective cover 32 need to be cleaned or repaired, the edge of the protective cover 32 is held, and the protective cover 32 is rotated in the opposite direction, that is, in the opposite direction of the installation direction, to drive the clamping block 36 on the surface of the protective cover 32 to slide in the opposite direction along the groove of the L-shaped clamping groove 37, until the clamping block 36 is separated from the limiting end of the L-shaped clamping groove 37, and then the protective cover 32 is taken out axially upward to expose the fan 35 and the cross-shaped mounting frame 33 inside. If the fan 35 needs to be cleaned or a damaged fan 35 needs to be replaced, the fan 35 is directly pulled outward along the axial direction of the mounting shaft 34, and the fan 35 and the mounting shaft 34 slide relative to each other until the fan 35 is completely separated from the mounting shaft 34. After cleaning or replacing a new fan 35, the fan 35 is pushed back to the original position along the axial direction of the mounting shaft 34 according to the initial assembly method.

[0047] Finally, it should be noted that the above-described only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fused deposition modeling (FDM) 3D printer with an integrated near-far end 3D print head, comprising a power module (1) and an integrated printing mechanism (2) mounted at the front end of the power module (1), characterized in that: It also includes a cooling assembly (3) disposed at the rear end of the power module (1); The cooling assembly (3) includes a mounting base (31) fixedly connected to the side of the power module (1) away from the integrated printing mechanism (2). A protective cover (32) is provided on the side of the mounting base (31) away from the power module (1). A cross-shaped mounting bracket (33) is fixedly connected to the inner wall of the mounting base (31). A mounting shaft (34) is fixedly connected at the center of the cross-shaped mounting bracket (33). A fan (35) is slidably connected to the mounting shaft (34).

2. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 1, characterized in that: The protective cover (32) is uniformly fixedly connected with three sets of locking blocks (36) around its perimeter, and the mounting base (31) has an L-shaped slot (37) on its inner side that cooperates with the locking blocks (36).

3. The integrated near-far end 3D printing head of the fused deposition modeling 3D printer according to claim 1, characterized in that: The protective cover (32) is a hollowed-out frustum-shaped structure, and the protective cover (32) is made of ABS plastic material. The hollowed-out part of the protective cover (32) is provided with streamlined windproof ribs.

4. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 1, characterized in that: It also includes an air guide cover assembly (4) disposed on the side of the mounting base (31) away from the power module (1); The air guide cover assembly (4) includes an air guide cover A (41). A cover support connecting arm (42) is provided on the side of the mounting base (31) away from the power module (1). A support arm hinge seat (43) is symmetrically fixedly connected to the top end of the cover support connecting arm (42). A cover hinge connecting shaft (44) is symmetrically fixedly connected to the top end of the air guide cover A (41). The support arm hinge seat (43) is rotatably connected to the cover hinge connecting shaft (44).

5. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 4, characterized in that: The mounting base (31) is provided with a cover plate support arm sliding groove (45) on the side away from the power module (1) to cooperate with the cover plate support connecting arm (42).

6. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 5, characterized in that: A damping bearing is provided between the support arm hinge seat (43) and the cover plate hinge connection shaft (44).

7. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 6, characterized in that: It also includes an elastic positioning component (5) disposed inside the mounting base (31); The elastic positioning component (5) includes an annular sliding base (51) fixedly connected to the bottom end of the cover plate support connecting arm (42), and the mounting base (31) has an annular positioning groove (52) that cooperates with the annular sliding base (51).

8. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 7, characterized in that: The mounting base (31) has a sliding groove (53) for the toothed block inside. The mounting base (31) has an elastic positioning toothed block (54) that cooperates with the sliding groove (53). The elastic positioning toothed block (54) slides inside the mounting base (31) through the annular sliding base (51). A positioning return spring (55) is fixedly connected to the bottom end of the elastic positioning toothed block (54). The other end of the positioning return spring (55) is fixedly connected to the mounting base (31) through the sliding groove (53). The bottom end of the annular positioning groove (52) has a toothed engagement groove (56) that cooperates with the elastic positioning toothed block (54).

9. The integrated proximal and distal end 3D printing head of the fused deposition modeling 3D printer according to claim 8, characterized in that: The elastic positioning tooth block (54), the positioning reset spring (55), and the tooth engagement groove (56) are all provided in several sets. The several sets of elastic positioning tooth blocks (54), the positioning reset spring (55), and the tooth engagement groove (56) are arranged in a circular array inside the mounting base (31) with the axis of the annular positioning groove (52) as the center.

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