Storage mechanism and additive manufacturing apparatus

Abstract

The application relates to the technical field of additive manufacturing, in particular to a storage mechanism and an additive manufacturing device. The storage mechanism comprises a ring-shaped main body, the ring-shaped main body has coaxially arranged outer and inner circumferential surfaces and parallelly arranged top and bottom annular surfaces, the ring-shaped main body is provided with a plurality of mounting holes for storing nozzle assemblies, the mounting holes are arranged in the radial direction, are located on the outer circumferential surface and extend to the inner circumferential surface, adjacent mounting holes are arranged at intervals, and the axial end surface of the ring-shaped main body is provided with a limiting part; when the nozzle assembly is stored in the mounting hole, the limiting part limits and fixes the nozzle assembly. The storage mechanism realizes quick switching of the nozzle assembly by rotating the ring-shaped main body, adapts to the replacement requirement of the equipment, is high in efficiency, the radially arranged mounting holes improve the space utilization rate and the structure is compact, the limiting part guarantees the stability of the assembly, adjacent mounting holes are arranged at intervals in an orderly manner, interference is prevented and management is facilitated.

Description

[0001] This application claims priority to Chinese Patent Application No. 202511105177.2, filed with the Chinese Patent Office on August 6, 2025, entitled "Hot End Component and 3D Printer", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of additive manufacturing, and more particularly to a storage mechanism and additive manufacturing equipment. Background Technology

[0003] The hot end of a 3D printer is the output port of the additive manufacturing equipment. It extrudes flowable filament for additive manufacturing, achieving stereoscopic printing. Current printing equipment can support printing with materials of multiple colors, enabling color combinations and improving printing results.

[0004] Because the hot end of current printing equipment is a single, integrated component, it is not convenient to replace directly. The only way to achieve multi-color printing is by flushing the nozzles with consumables. This method of consumable replacement results in issues such as mixed colors and longer printing wait times.

[0005] To address the aforementioned issues, existing technologies propose a method for replacing nozzle assemblies in the hot end, enabling rapid replacement. However, currently, nozzle assemblies are typically stored fixedly in a designated area, and different nozzle assemblies are picked up, installed, or stored using a replacement device within the additive manufacturing equipment based on set coordinates. While this setup meets the need for nozzle assembly replacement, it places extremely high demands on the replacement device's range of motion and operational precision, resulting in complex structures and significant operational and control challenges. Utility Model Content

[0006] The purpose of this application is to overcome at least one of the shortcomings of the prior art and to provide a storage mechanism and additive manufacturing equipment to solve the problem that the storage of nozzle components in the prior art cannot be coordinated with the replacement device.

[0007] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application.

[0008] According to one aspect of this application, a storage mechanism is provided for storing nozzle assemblies in an additive manufacturing equipment. The storage mechanism includes an annular body having an outer peripheral surface and an inner peripheral surface coaxially arranged, and a top surface and a bottom surface arranged in parallel. The annular body is provided with a plurality of radially arranged mounting holes, one end of which is located on the outer peripheral surface and the other end extends toward the inner peripheral surface. Adjacent mounting holes are spaced apart. The top surface and / or the bottom surface of the annulus are provided with limiting portions. A plurality of through holes are uniformly spaced on the top surface and / or the bottom surface of the annulus, extending axially along the annular body and penetrating the annular body.

[0009] When the nozzle assembly is placed in the mounting hole, the limiting part limits and fixes the nozzle assembly.

[0010] In this type of embodiment, a storage mechanism specifically designed for storing nozzle assemblies is provided. Multiple radially arranged mounting holes can accommodate the storage of multiple nozzle assemblies. After the nozzle assemblies are inserted, they mainly occupy radial space. Combined with the coaxial structure design of the annular body, compared with the planar storage location, it not only facilitates the replacement of nozzle assemblies but also utilizes the portability of vertical space, avoiding the occupation of planar space. It can achieve the orderly arrangement of multiple nozzle assemblies within the limited internal space of the equipment, improve space utilization, and adapt to the use scenario of compact internal space of additive manufacturing equipment.

[0011] The design of the limiting part can accurately limit and fix the nozzle assembly in the mounting hole, effectively preventing it from shaking, shifting or even falling off during storage, transportation or switching. This ensures that the nozzle assembly is always in a stable limited state, reduces the risk of accuracy deviation or damage caused by loose components, and ensures the reliability of subsequent retrieval and use.

[0012] With adjacent mounting holes spaced apart and arranged in a ring shape, multiple nozzle assemblies can be classified and stored in an orderly manner, avoiding collisions and interference between components. This facilitates quick identification and retrieval of target nozzle assemblies by operators, further optimizing the management efficiency of multiple nozzle assemblies.

[0013] On the one hand, the through-hole design simplifies the structure and reduces weight. While ensuring the overall structural strength of the annular body meets usage requirements, it effectively reduces the overall weight of the storage mechanism, achieving the goal of lightweight design. The lightweight structure not only reduces the overall load on the equipment but also reduces the rotational inertia of the annular body itself.

[0014] On the other hand, the lightweight structure directly reduces the load requirements of the power source driving the rotation of the annular body. With a lighter power source load, energy consumption during motor operation can be reduced, extending the motor's service life. At the same time, the rotation of the annular body is easier to control, improving the smoothness and response speed of the rotation process. This further optimizes the smoothness and reliability of nozzle assembly switching operations, meeting the high-efficiency operation requirements of additive manufacturing equipment.

[0015] In some exemplary embodiments of this application, there are multiple through holes, which are respectively disposed between two adjacent mounting holes, and the through holes penetrate the annular body along the axial direction.

[0016] In this type of embodiment, the through holes are evenly distributed on the annular body, precisely avoiding the core stress areas of the mounting holes and limiting parts, so that the structure around each mounting hole retains a complete load-bearing section, effectively ensuring the structural strength consistency of each mounting hole.

[0017] On the other hand, the axially integrated design maximizes the weight reduction effect. Combined with the evenly distributed layout, it significantly reduces the overall weight of the ring-shaped main body while avoiding the shift of the center of gravity caused by sudden changes in local weight.

[0018] Furthermore, the annular main body design, compared to a planar storage mechanism, provides a foundation for switching printhead assemblies to adapt to additive printing equipment. In practical applications, when changing printhead assemblies, their positions can be switched as needed, facilitating rapid replacement. Specifically, relying on the annular main body structure, rotating the annular body switches the corresponding target printhead assembly to a preset position, allowing the replacement device to acquire the target printhead assembly at that position. This design eliminates the need for additional complex moving or positioning mechanisms, directly integrating with the printhead assembly replacement process of additive manufacturing equipment, significantly reducing replacement auxiliary time, substantially improving overall equipment efficiency, and meeting the production demands of high-frequency printhead switching.

[0019] In some exemplary embodiments of this application, the limiting part is provided with a first slot and a second slot. The first slot is arranged along an axis parallel to the mounting hole, and the second slot is arranged around the axis of the mounting hole. The first slot communicates with the second slot.

[0020] The first slot forms an axial channel, allowing radially outward-extending structures on the nozzle assembly to be accommodated and placed without interference. Simultaneously, the first slot also serves as a guide, enabling precise circumferential positioning of the nozzle assembly. This prevents excessive offset before entering the limiting section, which could lead to interference, failure to secure the nozzle in its storage position, and subsequent loosening or falling during operation.

[0021] The second slot allows a portion of the structure located in the first slot to rotate into the second slot after passing through the first slot. At this point, the second slot forms an axial upper limit with the structure, further creating a limiting relationship to prevent loosening.

[0022] The first axial slot solves the interference problem of the radial extension structure of the nozzle assembly, and the guiding function ensures the positioning accuracy in the initial stage of installation; the rotating locking second slot forms a rigid limit in the axial direction, so that the nozzle assembly can be mechanically locked by simple rotation after the initial positioning is completed, which greatly reduces the probability of loosening caused by external factors such as vibration and impact, and provides dual protection for the stable storage and safe switching of the nozzle assembly.

[0023] In some exemplary embodiments of this application, one mounting hole corresponds to two limiting parts, one limiting part has a first slot on the top surface of the ring, the other limiting part has a first slot on the bottom surface of the ring, and the second slots of the two limiting parts are symmetrically arranged around the axis of the mounting hole.

[0024] The first slots of the two limiting parts are respectively set on the top and bottom surfaces of the ring. The first slots extend radially. This arrangement can be adapted to the side wall processing of the mounting hole. Since the first slots do not need to bear force, their location on the two axial end faces can reduce the volume occupied by their arrangement and reduce excessive processing of the ring body.

[0025] The second slot extends along the thickness direction of the annular body based on the first slot, so that the second slot is completely located inside the annular body. Its position is deep into the annular body, and its structural strength meets the requirements when it is used with the nozzle assembly. At the same time, the limiting setting is more stable and reliable.

[0026] In some exemplary embodiments of this application, the storage mechanism further includes a force-applying mechanism, which is fixedly disposed on the annular body. When the nozzle assembly is stored in the mounting hole, the force-applying mechanism generates a force that acts on the nozzle assembly to limit and fix the nozzle assembly to the limiting part.

[0027] The force-applying mechanism is fixed to the annular body and actively generates force when the nozzle assembly is stored in the mounting hole, forming a dual fixing mechanism of "mechanical limiting + active force application". This continuous force ensures that the nozzle assembly and the limiting part always maintain a tight limiting state, effectively compensating for gaps caused by long-term storage, assembly errors or vibration, avoiding the loosening problems that may occur with traditional pure mechanical limiting, and fundamentally reducing the risk of displacement or offset of the nozzle assembly during storage, switching and equipment operation.

[0028] In some exemplary embodiments of this application, the force-applying mechanism includes a plurality of magnetic bodies that are arranged one-to-one with the mounting holes. A plurality of fixing grooves corresponding one-to-one with the magnetic bodies are provided on the top surface and / or bottom surface of the ring. The magnetic bodies are embedded and fixed in the corresponding fixing grooves, and the magnetic attraction range of the magnetic bodies covers the corresponding limiting part.

[0029] The magnetic body is positioned one-to-one with the mounting hole, and its magnetic attraction range covers the corresponding limiting part. It can form a continuous and stable magnetic attraction and fixing force on the nozzle assembly located within the limiting part through magnetic force. This magnetic fixing method works in conjunction with the mechanical limiting part, adding non-contact force constraint on the basis of the original structural limiting. It effectively avoids the gap loosening of the nozzle assembly when the annular body rotates, the equipment vibrates, or there are slight external impacts, and improves the fixing tightness between the nozzle assembly and the limiting part, ensuring that the assembly is always firmly locked in the preset storage position.

[0030] Meanwhile, the fixing grooves on the top and / or bottom surfaces of the ring provide a suitable installation space for the magnet, allowing it to be stably embedded and fixed, preventing displacement, detachment, or shaking during equipment operation. This fixing installation method ensures the consistency of the magnet's position and the stability of the magnetic force application direction and intensity, guaranteeing the safe storage and stable switching of the nozzle assembly.

[0031] In some exemplary embodiments of this application, the storage mechanism further includes a drive base, which includes a fixed shaft and a drive unit. The annular body is rotatably connected to the fixed shaft, and the drive unit is fixedly connected to the annular body.

[0032] In this type of embodiment, the rotatable connection structure between the fixed shaft and the annular body provides stable rotational support for the annular body, ensuring that the annular body always maintains coaxiality during rotation, effectively reducing radial sway or offset during rotation, and ensuring the smoothness and accuracy of the rotation process.

[0033] Meanwhile, the fixed connection between the drive unit and the ring-shaped main body enables the direct transmission of driving force, reduces energy loss in the transmission links, and makes the rotation response of the ring-shaped main body faster and more efficient.

[0034] In addition, the integrated design of the drive base combines fixed support with drive function, which simplifies the rotation drive structure of the ring-shaped main body, reduces the overall assembly complexity of the equipment, and enhances the structural integrity and durability of the storage mechanism, thus ensuring long-term stable operation.

[0035] In some exemplary embodiments of this application, the driving part is a driven gear, and a plurality of positioning pins and fasteners with axes parallel to the axis of the annular body are provided between the driven gear and the annular body. The positioning pins are used for circumferential positioning of the driven gear and the annular body, and the driven gear and the annular body are fixedly connected by fasteners.

[0036] In this type of embodiment, the drive unit adopts a driven gear structure. Relying on the advantages of mature gear transmission technology and simple processing technology, it not only facilitates mass production and reduces processing and assembly costs, but also ensures the transmission accuracy and stability when the annular body rotates, avoiding the failure risk caused by complex transmission structures, and adapting to the core requirements of additive manufacturing equipment for transmission reliability.

[0037] The coordinated action of multiple locating pins enables precise alignment of the axes of the two components, effectively preventing problems such as eccentricity and tilting during assembly. This ensures the coaxiality of the annular body when rotating around a fixed axis, reduces rotational jamming and increased wear caused by axis deviation, and extends the service life of the mechanism.

[0038] Multiple fasteners form multiple sets of evenly distributed connection points, which, together with the positioning pins, can firmly fasten the driven gear and the ring-shaped body, greatly improving the connection strength and integrity of the two.

[0039] In some exemplary embodiments of this application, the drive seat is further provided with a bearing, the inner ring of which abuts against the fixed shaft, and the annular body and / or driven gear abuts against the outer ring of the bearing.

[0040] In this type of embodiment, the bearing arrangement provides a precise radial and axial positioning reference for the rotation of the annular body and the driven gear, effectively ensuring the coaxiality between the annular body, the driven gear, and the fixed shaft, and avoiding rotational eccentricity problems caused by assembly deviations.

[0041] Furthermore, the introduction of bearings completely changes the frictional form of relative motion between components under traditional direct assembly, transforming the sliding friction that might have existed into rolling friction, which significantly reduces frictional resistance and component wear during rotation.

[0042] According to one aspect of this application, an additive manufacturing apparatus is provided, the additive manufacturing apparatus including a nozzle assembly and a storage mechanism as described above, wherein a limiting portion of the storage mechanism is used to limit and fix the nozzle assembly when the nozzle assembly is inserted into the mounting hole of the storage mechanism.

[0043] Additive manufacturing equipment including the aforementioned storage mechanism, relying on the ring-shaped main body rotation switching design of the storage mechanism, can quickly complete the replacement of different printhead components without interrupting the printing process for complex manual alignment or handling. This significantly shortens the auxiliary time for printhead component replacement, reduces equipment downtime, and effectively improves the continuous operation efficiency of additive manufacturing operations. It is especially suitable for high-frequency printhead switching requirements in multi-material and multi-precision printing scenarios.

[0044] The limiting part of the storage mechanism can precisely limit and fix the printhead assembly inserted into the mounting hole. Combined with the auxiliary fixing effect of the force application mechanism, it can ensure that the printhead assembly maintains a stable spatial posture during storage and retrieval, avoiding installation accuracy deviations caused by component loosening or displacement. This design directly guarantees the printing positioning accuracy after the printhead assembly is assembled, reduces printing defects caused by abnormal printhead posture, and improves the quality stability of the molded parts.

[0045] The radial mounting hole design and compact annular structure of the storage mechanism efficiently utilize the internal space of the equipment, enabling the orderly storage of multiple nozzle assemblies within a limited volume. This avoids the problems of redundant internal space or cluttered layout caused by traditional storage methods. This integrated design makes the overall structure of the equipment more compact and the layout more rational, adapting to the development trend of miniaturization and integration of additive manufacturing equipment.

[0046] The storage mechanism, through multiple limiting and fixing mechanisms (slot limiting, magnetic attraction, etc.) and uniform force distribution design, can effectively protect the nozzle assembly from collisions and wear during storage or switching, reducing the risk of component damage. At the same time, the bearing support and gear transmission structure of the drive seat reduce frictional losses of rotating parts, improve the long-term operational reliability of the storage mechanism, thereby extending the service life of the entire additive manufacturing equipment and reducing equipment maintenance costs.

[0047] In some exemplary embodiments of this application, the limiting part includes a first slot and a second slot, the first slot is disposed along an axis parallel to the mounting hole, the second slot is disposed around the axis of the mounting hole, and the first slot communicates with the second slot.

[0048] The nozzle of the nozzle assembly includes a snap-fit ​​post that protrudes radially therefrom. The snap-fit ​​post can enter the first snap-fit ​​groove radially along the annular body and rotate circumferentially along the annular body to enter the second snap-fit ​​groove at the position where the first snap-fit ​​groove and the second snap-fit ​​groove are connected.

[0049] The first slot of the limiting part is set along the axis of the mounting hole, forming a precise fit with the radial locking post on the nozzle of the nozzle assembly. When the nozzle assembly is stored, the locking post can smoothly enter the first slot along the axial direction of the annular body. The first slot plays a clear guiding role in this process, effectively correcting the circumferential offset of the locking post, avoiding interference between the locking post and the edge of the slot due to positioning deviation, ensuring that the nozzle assembly accurately enters the storage position according to the preset trajectory, and reducing the difficulty of installation operation.

[0050] The second slot is positioned around the axis of the mounting hole and communicates with the first slot. After the locking pin is in place along the first slot, it can smoothly enter the second slot through the circumferential rotation of the annular body or the nozzle assembly. At this time, the second slot and the locking pin form a stable axial limiting relationship. With the help of the mechanical interlocking structure of the slot and the locking pin, the axial displacement of the nozzle assembly can be effectively limited. Combined with the guiding and positioning effect of the first slot, a complete limiting logic of "axial guidance - rotation around the axis - axial locking" is formed. Structurally, this eliminates the risk of the nozzle assembly becoming loose during storage, switching, and equipment operation, and improves the reliability of the nozzle assembly's storage and fixation.

[0051] In some exemplary embodiments of this application, when the storage mechanism further includes a force-applying mechanism, the force-applying mechanism is a magnetic body, the locking post and / or the entire nozzle is made of a magnetically attractive material, the magnetic body generates a magnetic attraction effect to attract the locking post and / or the entire nozzle, and the force-applying mechanism is located at the end of the second slot away from the first slot.

[0052] By using a magnetic force-applying mechanism and employing magnetically absorbable materials to fabricate the locking pins and / or the entire nozzle, the magnetic attraction generated by the magnetic body enables the nozzle assembly to be adsorbed and fixed. Magnetic adsorption eliminates the need for complex mechanical contact structures, generating a stable force through non-contact methods. This avoids the rigid collisions and wear that may occur with traditional mechanical locking, and also adapts to minor dimensional deviations in the locking pins or nozzle, improving the compatibility of the fixation.

[0053] Meanwhile, a magnetic element is positioned at the end of the second slot furthest from the first slot. When the locking pin is guided into the second slot along the first slot and rotates to the end of the second slot, the magnetic attraction precisely acts on the critical position for limiting and fixing, forming a dual guarantee of "mechanical limiting + magnetic reinforcement." This arrangement concentrates the magnetic force on the final fixed position of the locking pin within the second slot, effectively preventing the nozzle assembly from retracting from the second slot due to vibration or other factors during the rotation of the annular body or equipment operation. This further enhances the reliability of the limiting and fixing, ensuring that the nozzle assembly remains stable during storage and switching.

[0054] In addition, the magnetic fixing method is easy to operate. When removing the nozzle assembly, only a moderate external force is needed to overcome the magnetic attraction, which balances the fixing firmness and the ease of installation and removal, thus optimizing the overall operating experience.

[0055] In some exemplary embodiments of this application, multiple locking pins are arrayed around the axis of the nozzle, multiple sets of locking pins are set corresponding to the first and second locking slots, and / or multiple sets of locking pins are set corresponding to the force application mechanism.

[0056] The corresponding engagement of multiple locking posts and multiple sets of locking slots enables multi-point limiting and synergistic effects between the nozzle assembly and the storage mechanism. After the arrayed locking posts are embedded into their corresponding first locking slots and rotated into the second locking slots, they can form uniform limiting constraints from multiple circumferential positions, avoiding the problem of force concentration that occurs with single-point limiting.

[0057] Multiple force-applying mechanisms (such as magnetic bodies) correspond to multiple locking posts, which can apply uniform adsorption and fixing force to the nozzle assembly from multiple points. This, combined with the mechanical limiting of multiple sets of slots, forms a dual fixing mode of "multi-point mechanical limiting + multi-point magnetic reinforcement." This synergistic effect can significantly improve the stability of the nozzle assembly in the storage state. Even when the annular body rotates for switching or the equipment vibrates during operation, it can effectively prevent the nozzle assembly from loosening or shifting, ensuring the long-term reliability of the fixed state and providing a solid guarantee for the precise nozzle switching and stable operation of additive manufacturing equipment.

[0058] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0059] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0060] Figure 1 A rear view schematic diagram of a storage mechanism provided in one embodiment of this application is shown.

[0061] Figure 2 It shows Figure 1 Enlarged diagram of point A in the middle.

[0062] Figure 3 A side view schematic diagram of a storage mechanism provided in one embodiment of this application is shown.

[0063] Figure 4 It shows Figure 3 Enlarged diagram of point B in the middle.

[0064] Figure 5 This illustration shows a cross-sectional view of a storage mechanism provided in one embodiment of this application from a side view perspective.

[0065] Figure 6 An exploded view of a storage mechanism provided in one embodiment of this application is shown.

[0066] The above figures include the following reference numerals:

[0067] 10. Ring-shaped main body; 11. Outer circumferential surface; 12. Inner circumferential surface; 13. Top surface of the ring; 14. Bottom surface of the ring; 15. Mounting hole; 16. Limiting part; 161. First slot; 162. Second slot; 17. Fixing groove; 18. Through hole; 20. Nozzle assembly; 21. Snap-fit ​​post; 30. Force application mechanism; 31. Magnetic body; 40. Drive base; 41. Fixed shaft; 42. Drive part; 43. Positioning pin; 44. Fastener; 45. Bearing; 50. Drive component; 51. Drive gear. Detailed Implementation

[0068] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0069] The features, structures, or characteristics described above can be combined in any suitable manner in one or more embodiments, and where possible, the features discussed in the various embodiments are interchangeable. In the above description, numerous specific details are provided to give a full understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0070] Although this application uses relative terms such as "up" and "down" to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as the orientation of the example shown in the accompanying drawings. It is understood that if the icon's arrangement is flipped so that it is upside down, the component described as "up" will become the component described as "down". Other relative terms, such as "high", "low", "top", "bottom", "front", "back", "left", and "right", also have similar meanings. When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0071] In this application, the terms “a,” “an,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion meaning and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.

[0072] Before introducing the storage mechanism of this application, we will first provide detailed examples of storage mechanisms in related technologies and their existing problems.

[0073] The hot end of a 3D printer, as the core output unit of additive manufacturing equipment, extrudes flowable filament to complete the printing of three-dimensional structures. Current mainstream printing equipment supports multi-color printing, enhancing the visual appeal of the finished product through color combinations. However, most existing hot ends are one-piece structures, making direct replacement difficult. In actual multi-color printing, it's necessary to clean the nozzle of any remaining filament before using a new color. This method not only wastes filament but also easily leads to color mixing between the old and new filaments due to incomplete cleaning, resulting in color bleeding and extended printing time.

[0074] To address this pain point, some existing technologies offer solutions with replaceable hot-end nozzle assemblies, aiming to achieve rapid nozzle switching. However, current technologies lack dedicated devices for storing and replacing multiple nozzle assemblies. Nozzle assemblies are typically stored in fixed locations, relying on built-in replacement devices to perform grabbing, installation, and storage operations based on preset coordinates. While this approach fulfills the need for nozzle assembly replacement, it places stringent requirements on the range of motion and operational precision of the replacement device, resulting in complex device structures, high operational difficulty, and cumbersome control logic.

[0075] More importantly, existing storage devices only have basic nozzle assembly storage functions and cannot meet the high-efficiency replacement requirements of the entire machine. Their static storage design neither optimizes the replacement path nor reduces the workload of the replacement device, resulting in low replacement efficiency and continuously placing excessive demands on the performance of the replacement device.

[0076] Therefore, how to provide a storage device with a more reasonable structural design that can both adapt to the replacement of nozzle components and ensure stable storage performance is a technical problem that urgently needs to be solved by those skilled in the art.

[0077] Please see Figures 1 to 5In some exemplary embodiments of this application, a storage mechanism is provided for storing nozzle assemblies in additive manufacturing equipment. The storage mechanism includes an annular body 10, which has an outer peripheral surface 11 and an inner peripheral surface 12 arranged coaxially, and a top annular surface 13 and a bottom annular surface 14 arranged in parallel. The annular body 10 is provided with a plurality of radially arranged mounting holes 15, one end of which is located on the outer peripheral surface 11 and the other end extends toward the inner peripheral surface 12. Adjacent mounting holes 15 are spaced apart. The top annular surface 13 and / or the bottom annular surface 14 are provided with limiting portions 16. When the nozzle assembly 20 is stored in the mounting hole 15, the limiting portion 16 limits and fixes the nozzle assembly 20.

[0078] The mounting holes 15 are radially arranged along the annular body 10 and extend into the inner circumferential surface 12, so that the nozzle assembly 20 mainly occupies the radial space after insertion. Combined with the coaxial structure design of the annular body 10, compared with the planar arrangement storage method, it not only facilitates the replacement operation of the nozzle assembly 20, but also reduces the planar space occupation by optimizing the vertical space utilization efficiency. It can realize the orderly arrangement of multiple nozzle assemblies 20 in the limited space inside the equipment, effectively improving the space utilization rate and adapting to the use scenarios of additive manufacturing equipment with compact internal space.

[0079] The design of the limiting part 16 provides precise positioning and fixation for the nozzle assembly 20 stored in the mounting hole 15, which can effectively prevent the assembly from shaking, shifting or even falling off during storage, transportation or switching, ensuring that the nozzle assembly 20 is always in a stable and limited state, reducing the risk of accuracy deviation or damage caused by loose assembly, and ensuring reliability during subsequent retrieval and use.

[0080] Furthermore, the adjacent mounting holes 15 are spaced apart, and combined with the annular distribution structure, multiple nozzle assemblies 20 can be stored in a classified and orderly manner, avoiding collisions and interference between components. This facilitates quick identification and retrieval of target components by operators, further optimizing the management efficiency of multiple nozzle assemblies 20. In some embodiments, the mounting holes 15 can be evenly spaced along the outer circumferential surface 11 of the annular body 10 (i.e., every two adjacent mounting holes 15 have a consistent spacing distance). In this way, the annular body 10 only needs to rotate to an integer multiple of the spacing distance to allow the mounting holes 15 to reach the designated replacement position, facilitating the design of replacement algorithms.

[0081] Understandably, the annular main body 10 provides a basis for switching printhead assemblies 20 to adapt to additive printing equipment compared to a planar storage mechanism. In this solution, when replacing the printhead assembly 20, the replacement device only needs to grasp and place the printhead assembly 20 at the corresponding position, without requiring additional position adjustments or verification for the storage location of the printhead assembly 20. The positional changes of different printhead assemblies 20 are achieved by altering the storage mechanism. This not only improves disassembly and assembly efficiency but also avoids the structural complexity and development difficulties caused by functional integration due to the use of independent control logic at the control level.

[0082] Based on the above technical solution, the storage mechanism reliably limits and fixes the nozzle assembly 20 installed in the radial mounting hole 15 through the limiting part 16, thus achieving stable storage of the nozzle assembly 20. At the same time, the structural design of the annular body 10 provides a unified position reference for the radial mounting holes 15 on the outer peripheral surface 11. By rotating the annular body 10, the corresponding target nozzle assembly can be switched to a preset position, and the target nozzle assembly can be retrieved at that position in conjunction with the replacement device. This setup eliminates the need for additional complex moving or positioning mechanisms and can accurately adapt to the replacement device of additive manufacturing equipment, enabling it to directly perform fixed-point storage and retrieval operations, eliminating complex component positioning and acquisition processes, and significantly improving the replacement efficiency of the nozzle assembly 20.

[0083] In one specific implementation, the fixing of the nozzle assembly 20 by the limiting part 16 can be achieved by a snap-fit: the nozzle assembly 20 is provided with a corresponding snap-fit, and the relative degree of freedom of the two is restricted by the engagement of the snap-fit ​​and the limiting part 16, so as to ensure storage stability.

[0084] In another specific embodiment, the limiting part 16 forms a circumferential limit on the nozzle assembly 20, while the cover seals the outlet of the mounting hole 15. The effective fixation of the assembly is achieved through the synergistic effect of circumferential limiting and axial sealing.

[0085] Please see Figure 5 In a specific embodiment based on the above, the mounting hole 15 is provided through the outer peripheral surface 11 of the annular body 10 and connects to the inner peripheral surface 12.

[0086] From the perspective of structural lightweighting, the annular body 10 reduces the amount of material used by setting the inner circumferential surface 12, and achieves overall weight reduction while ensuring structural strength. This helps to reduce energy consumption when the annular body 10 rotates and improves operational flexibility.

[0087] From the perspective of assembly compatibility, the through-hole 15 does not have a limiting structure in the radial direction, which eliminates the limitation on the length of the nozzle assembly 20, and can be compatible with nozzle assemblies 20 of different lengths. This significantly broadens the applicability of the storage mechanism and enhances the flexibility and versatility in the assembly process.

[0088] Please see Figure 2 In some exemplary embodiments of this application, the limiting part 16 is provided with a first slot 161 and a second slot 162. The first slot 161 is arranged along an axis parallel to the mounting hole 15, and the second slot 162 is arranged around the axis of the mounting hole 15. The first slot 161 communicates with the second slot 162.

[0089] In this embodiment, the limiting part 16 forms a cooperative limiting structure by setting a first slot 161 and a second slot 162 (which are interconnected): the first slot 161 extends along the axial direction of the mounting hole 15, which can accommodate the radially protruding structure of the nozzle assembly 20 to avoid interference, and can also achieve precise circumferential positioning of the nozzle assembly 20 through guiding action, preventing interference, inability to fixation, and loosening and falling off during operation due to excessive offset before installation; the second slot 162 is set around the axial direction of the mounting hole 15, so that the component structure passing through the first slot 161 can enter it after rotation, forming an axial limit to prevent loosening. The two work together to provide a reliable guarantee for the stable storage and safe switching of the nozzle assembly 20 through the dual functions of axial guiding positioning and rotation locking.

[0090] In some alternative embodiments, the second slot 162 of the limiting part 16 adopts a straight slot design, with its extension direction parallel to the axis of the annular body 10. After communicating with the first slot 161 arranged along the axis of the mounting hole 15, it forms an L-shaped composite slot structure. The bottom depth of the second slot 162 is precisely designed to fully accommodate the protruding part of the nozzle assembly 20, avoiding assembly interference or limiting failure due to insufficient space.

[0091] This L-shaped slot structure has significant advantages in terms of processing: in subtractive machining processes such as milling, it can be directly machined from the top surface 13 or bottom surface 14 of the annular body 10 in one operation, without the need for complex multi-process switching or positioning adjustments. This not only simplifies the processing flow and reduces production difficulty, but also ensures the dimensional accuracy and structural consistency of the slot, providing stable and reliable technical support for subsequent mass production and application. This design feature has good adaptability and practicality for subsequent related processing and assembly operations.

[0092] Please see Figure 2 In some exemplary embodiments of this application, a mounting hole 15 is provided with a plurality of limiting parts 16. The plurality of limiting parts 16 corresponding to the mounting hole 15 are arranged in an array around the axis of the mounting hole 15. When the nozzle assembly 20 is stored in the mounting hole 15, the plurality of limiting parts 16 corresponding to the mounting hole 15 limit and fix the nozzle assembly 20.

[0093] In this type of embodiment, multiple limiting parts 16 are arranged in an array around the axis of the mounting hole 15, which can correspond to multiple radially protruding structures on the nozzle assembly 20. Each protruding structure can be limited and fixed by the corresponding limiting part 16, avoiding the problem of limiting omission or interference caused by the complex structure of the nozzle assembly 20 and the large number of protruding structures, and broadening the adaptability range of the storage mechanism to nozzle assemblies with different structures.

[0094] The multiple limiting parts 16 can also disperse the limiting force and reduce the risk of structural damage. The multiple limiting parts 16 form an axial limit on the nozzle assembly 20 from different circumferential positions, avoiding a single position from abutting each other. This effectively avoids the situation where the limiting stress is concentrated on a certain slot or local structure of the assembly, reducing the risk of wear and deformation of the limiting parts 16 due to excessive long-term stress, as well as the risk of structural damage to the protruding nozzle assembly, and extending the service life of the storage mechanism and the nozzle assembly.

[0095] Furthermore, the array arrangement of the limiting parts 16 around the axis of the mounting hole ensures that the dispersed force is evenly distributed in the circumferential direction, forming a "joint resistance" force state, which makes the interaction between the storage mechanism and the nozzle assembly more even and reliable.

[0096] Understandably, multiple limiting parts 16 are used to address the problem of stress concentration at a single limiting point. The multi-slot array design can also reduce the risk of structural damage by dispersing the limiting force. Multiple limiting parts 16 form axial limiting on the nozzle assembly 20 from different circumferential positions, avoiding rigid contact at a single contact point. This effectively solves the problem of limiting stress concentration in a certain slot or local structure of the assembly, significantly reducing the probability of wear and deformation of the limiting parts 16 due to long-term heavy load. At the same time, it reduces the risk of damage to the protruding structure of the nozzle assembly 20 and extends the service life of the storage mechanism and the nozzle assembly 20.

[0097] Based on this, the coordination of multiple points can also improve assembly accuracy and reduce the requirements for processing accuracy. Through the mutual restriction of the combined assembly, even if the processing accuracy is poor, the assembly accuracy can be improved through such mutual restriction, which can be adapted to different types and sizes of nozzle assemblies 20.

[0098] In some embodiments, a mounting hole 15 is provided with three limiting parts 16.

[0099] Furthermore, the three limiting parts 16 are arranged in an array. The first slot 161 of any one of the limiting parts 16 is perpendicular to the outer peripheral surface 11 of the annular body 10.

[0100] In some embodiments, one mounting hole 15 is provided with four limiting parts 16.

[0101] Furthermore, four limiting parts 16 are arranged in an array.

[0102] In some specific solutions based on the above embodiments, in order to further enhance the guidance accuracy and limiting stability, the size of the slot has been specifically optimized: the width of the first slot 161 is set to be greater than the radial dimension of the protruding locking post 21 on the nozzle assembly 20, while the width of the second slot 162 is designed with an interference fit with the locking post 21.

[0103] When the snap-fit ​​post 21 enters the first slot 161, the wider slot design allows it to pass smoothly through the guide channel without being limited by radial dimensions, effectively avoiding jamming problems caused by dimensional deviations and ensuring smooth guidance during the initial installation phase. When the snap-fit ​​post 21 rotates into the second slot 162, the interference fit structure forms a tight connection, limiting the relative displacement of the two through slight dimensional interference, ensuring that the nozzle assembly 20 remains fixed during storage and switching, thus improving the reliability of the limiting and fixing from a structural perspective.

[0104] Furthermore, the first slot 161 adopts a gradient opening design in the radial direction: the opening size at the end farther from the second slot 162 is larger, while the opening size at the end closer to the second slot 162 gradually decreases. At the connection position between the first slot 161 and the second slot 162, the opening size forms a precise clearance fit with the locking post 21. This gradient size design gives the first slot 161 stronger guiding error tolerance. When the locking post 21 is initially inserted, even if there is a certain radial positioning deviation, the larger inlet opening can still accommodate the locking post 21 to enter. Subsequently, the gradually narrowing slot structure naturally guides the locking post 21 to slide along the preset path. When reaching the connection position, the size setting of the clearance fit ensures that the locking post 21 can smoothly transition to the second slot 162, while avoiding positioning offset caused by excessive gap, achieving a smooth transition from "rough introduction" to "precise docking".

[0105] This structural design significantly reduces the reliance on initial positioning accuracy during assembly, eliminating the need for rigorous position calibration before insertion and greatly simplifying the assembly process of the nozzle assembly 20. Whether in manual or automated assembly scenarios, it reduces problems such as jamming and interference caused by positioning errors. This not only lowers the control precision requirements of the assembly device but also shortens the debugging time for each assembly, further improving the smoothness and reliability of nozzle assembly 20 replacement.

[0106] Please see Figure 3 , Figure 4 as well as Figure 6In some exemplary embodiments of this application, one mounting hole 15 is provided for two limiting parts 16, one of the limiting parts 16 has a first slot 161 on the top surface 13 of the ring, the other limiting part 16 has a first slot 161 on the bottom surface 14 of the ring, and the second slots 162 of the two limiting parts 16 are symmetrically arranged around the axis of the mounting hole 15.

[0107] The first slots 161 of the two limiting parts 16 are respectively opened on the top surface 13 and the bottom surface 14 of the ring, and extend radially along the annular body 10. This layout is adapted to the machining requirements of the side wall of the mounting hole 15. Since the first slots 161 do not bear the main force, arranging them on the axial end face can reduce the space occupation requirement and reduce excessive cutting of the annular body 10 structure.

[0108] The second slot 162 is formed by extending the first slot 161 along the thickness direction of the annular body 10, so that the second slot 162 is completely embedded inside the annular body 10. This structure design that extends deep into the body can ensure sufficient structural strength and achieve a more stable and reliable limiting and fixing effect when it is used with the nozzle assembly 20.

[0109] Please see Figure 1 and Figure 2 In some exemplary embodiments of this application, the storage mechanism further includes a force-applying mechanism 30, which is fixedly disposed on the annular body 10. When the nozzle assembly 20 is stored in the mounting hole 15, the force-applying mechanism 30 generates a force that acts on the nozzle assembly 20 so that the nozzle assembly 20 is limited and fixed with the limiting part 16.

[0110] The force-applying structure primarily forms a dual fixing mechanism of "mechanical limiting + active force application." This continuous force ensures that the nozzle assembly 20 and the limiting part 16 always maintain a tight limiting state, effectively compensating for gaps caused by long-term storage, assembly errors, or vibration, and avoiding the loosening problems that may occur with traditional purely mechanical limiting.

[0111] Based on this, in some alternative embodiments, the force-applying mechanism 30 may specifically be an elastic element, which applies an elastic force to the nozzle assembly 20 to make it embed into the second slot 162.

[0112] Alternatively, the force-applying mechanism 30 can be a damping structure, which needs to overcome a certain damping effect when entering and exiting the second slot 162. Specifically, it can be filled with a non-Newtonian fluid, etc.

[0113] like Figure 2As shown, in some exemplary embodiments of this application, the force application mechanism 30 includes a plurality of magnetic bodies 31 that are provided one-to-one with the mounting holes 15. A plurality of fixing grooves 17 corresponding one-to-one with the magnetic bodies 31 are provided on the top surface 13 and / or the bottom surface 14 of the ring. The magnetic bodies 31 are embedded and fixed in the corresponding fixing grooves 17, and the magnetic attraction range of the magnetic bodies 31 covers the corresponding limiting part 16.

[0114] The magnetic material 31 refers to a material that has magnetism (capable of attracting substances such as iron, cobalt, and nickel). Its magnetism originates from the orderly arrangement of magnetic moments of internal atoms or molecules. It mainly provides non-direct contact magnetic force, and this arrangement can avoid mechanical contact from damaging the nozzle assembly 20.

[0115] In some alternative embodiments, the magnetic body 31 may specifically be a natural magnet, a ferrite magnet, a rare earth permanent magnet (neodymium iron boron magnet, samarium cobalt magnet), an alnico magnet, etc.

[0116] Please see Figure 1 and Figure 2 As shown, in some exemplary embodiments of this application, at least one through hole 18 is provided on the top surface 13 and / or the bottom surface 14 of the annulus, and the through hole 18 extends along the axial direction of the annular body 10.

[0117] The through-hole portion 18 can reduce the structural mass of the annular body 10, thereby achieving a lightweight effect and reducing the driving power requirements.

[0118] In some alternative embodiments, the through-hole portion 18 is one or more of the following shapes: circular, rectangular, polygonal, fan-shaped, and arc-shaped.

[0119] Please see Figure 1 and Figure 2 As shown, in some exemplary embodiments of this application, there are multiple through holes 18, which are respectively disposed between two adjacent mounting holes 15, and the through holes 18 penetrate the annular body 10 along the axial direction.

[0120] This configuration maintains the circumferential balance of the annular body 10 and improves rotational balance.

[0121] In some alternative embodiments, when the mounting holes 15 are arranged in an array, the through holes 18 are arranged in a corresponding array.

[0122] Please see Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, in some exemplary embodiments of this application, the storage mechanism further includes a drive base 40, which includes a fixed shaft 41 and a drive part 42. The annular body 10 is rotatably connected to the fixed shaft 41, and the drive part 42 is fixedly connected to the annular body 10.

[0123] The rotatable connection between the fixed shaft 41 and the annular body 10 provides a stable rotational support base for the annular body 10, ensuring that the annular body 10 maintains axial consistency when rotating, effectively suppressing radial sway and positional deviation during rotation, and ensuring the smoothness and positioning accuracy of the overall rotation.

[0124] Meanwhile, the rigid connection design between the drive unit 42 and the annular body 10 enables the direct transmission of driving force, reduces energy loss and power lag in the intermediate transmission links, and makes the rotation response of the annular body 10 more agile and efficient, enabling the rapid switching of the nozzle assembly 20.

[0125] In addition, the integrated design of the drive base 40 realizes the integration of fixed support and drive functions, which not only simplifies the rotation drive system structure of the ring-shaped main body 10 and reduces the overall assembly difficulty and debugging cost of the equipment, but also strengthens the structural integrity and long-term durability of the storage mechanism, providing a reliable guarantee for the stable operation of the storage mechanism.

[0126] Please see Figure 1 and Figure 6 As shown, in some exemplary embodiments of this application, a plurality of positioning pins 43 and fasteners 44 with axes parallel to the axis of the annular body 10 are provided between the driven gear and the annular body 10. The positioning pins 43 are used for circumferential positioning of the driven gear and the annular body 10, and the driven gear and the annular body 10 are fixedly connected by fasteners.

[0127] In this type of embodiment, the drive unit 42 adopts a driven gear structure. With the inherent advantages of mature gear transmission technology and simple processing technology, it not only facilitates mass production to reduce processing and assembly costs, but also accurately ensures the transmission accuracy and operational stability when the annular body 10 rotates, effectively avoiding the failure risks that are easily caused by complex transmission structures, and fully meeting the core requirements of additive manufacturing equipment for transmission reliability.

[0128] The coordinated positioning function of multiple positioning pins 43 can achieve precise axial alignment between the driven gear and the annular body 10, effectively avoiding assembly deviations such as eccentricity and tilting from the assembly source, ensuring the axial consistency of the annular body 10 when rotating around the fixed shaft 41, significantly reducing problems such as rotation jamming and accelerated component wear caused by axial deviation, and extending the overall service life of the mechanism.

[0129] Multiple fasteners 44, by constructing multiple sets of evenly distributed connection nodes, and in conjunction with the precise positioning of the positioning pins 43, reliably fasten the driven gear and the annular body 10, greatly improving the connection strength and structural integrity of the two, and providing structural protection for the stable operation of the transmission system.

[0130] In some alternative embodiments, the driven gear is provided with a radially extending retaining ring, and the inner circumferential surface 12 of the annular body 10 abuts against the radially outer surface of the retaining ring, thus forming a circumferential assembly relationship, allowing the two to be positioned and assembled. At the same time, this forms radial support when under force, preventing the radial force from acting directly on the positioning pin 43 and the fastener 44, and playing a role in resisting shearing.

[0131] In some alternative embodiments, an axial end face of the annular body 10 is provided with a groove, and the driven gear is provided with a radially extending retaining ring that is inserted into the groove to form a mating relationship.

[0132] Please see Figure 5 and Figure 6 As shown, in some exemplary embodiments of this application, the drive seat 40 is further provided with a bearing 45, the inner ring of the bearing 45 abutting against the fixed shaft 41, and the driven gear abutting against the outer ring of the bearing 45.

[0133] The bearing 45 not only transforms sliding friction into rotational friction, but also provides radial support through its own structure, giving the annular body 10 a basis for rotation.

[0134] Please see Figure 5 and Figure 6 As shown, the drive base 40 is also provided with a drive component 50, and its output end is provided with a drive gear 51, which meshes with the driven gear 42 for transmission.

[0135] The drive base 40 drives the storage mechanism to rotate, thereby enabling the switching of the target nozzle assembly 20. The advantage is that the gripping component of the nozzle assembly 20 only needs to reach a fixed position to grip the target nozzle assembly 20 each time it needs to be replaced. It does not need to be repositioned and moved to different positions for gripping based on different target nozzle assemblies 20. This reduces the space requirements of the whole machine, simplifies the control logic, and makes replacement more efficient.

[0136] In the scenario of replacing the nozzle assembly 20, the drive component 50 can flexibly switch the shape and position of the annular body 10 according to actual needs to meet the requirements of rapid replacement. Specifically, relying on the structure of the annular body 10, different nozzle assemblies 20 can be quickly switched simply by rotating the annular body 10, without the need for additional complex moving or positioning mechanisms. It can directly adapt to the nozzle assembly 20 replacement process of additive manufacturing equipment, greatly shorten the replacement auxiliary time, significantly improve the overall working efficiency of the equipment, and meet the production needs of high-frequency nozzle switching.

[0137] Furthermore, the diameter of the driving gear 51 is larger than the diameter of the driven gear.

[0138] In some exemplary embodiments of this application, the inner ring of the bearing 45 abuts against the fixed shaft 41, and the annular body 10 abuts against the outer ring of the bearing 45.

[0139] In some exemplary embodiments of this application, an additive manufacturing apparatus is provided, which includes a nozzle assembly 20 and a storage mechanism as described in any of the above embodiments. The limiting part 16 of the storage mechanism is used to limit and fix the nozzle assembly 20 when it is inserted into the mounting hole 15 of the storage mechanism.

[0140] With the rotating switching design of the ring-shaped main body 10 of the storage mechanism, the equipment can quickly complete the replacement of different printhead components 20 without interrupting the printing process for complex manual alignment or handling. This greatly shortens the auxiliary time for replacing printhead components 20, reduces equipment downtime, and effectively improves the continuous operating efficiency of additive manufacturing operations. It is especially suitable for high-frequency printhead switching needs in multi-material and multi-precision printing scenarios.

[0141] The limiting part 16 of the storage mechanism can precisely limit and fix the printhead assembly 20 inserted into the mounting hole 15. Combined with the auxiliary fixing effect of the force application mechanism 30, it can ensure that the printhead assembly 20 maintains a stable spatial posture during storage and retrieval, avoiding installation accuracy deviations caused by component loosening or offset. This design directly guarantees the printing positioning accuracy of the printhead assembly 20 after assembly, reduces printing defects caused by abnormal printhead posture, and improves the quality stability of the molded parts.

[0142] The radial mounting holes 15 and the compact annular structure of the storage mechanism efficiently utilize the internal space of the equipment, enabling the orderly storage of multiple nozzle assemblies 20 within a limited volume. This avoids the problems of redundant internal space or cluttered layout caused by traditional storage methods. This integrated design makes the overall structure of the equipment more compact and the layout more rational, adapting to the trend of miniaturization and integration in additive manufacturing equipment.

[0143] The storage mechanism, through multiple limiting and fixing mechanisms (slot limiting, magnetic attraction of magnetic body 31, etc.) and uniform force design, can effectively protect the nozzle assembly 20 from collisions and wear during storage or switching, reducing the risk of component damage. At the same time, the bearing 45 support and gear transmission of the drive seat 40 reduce the frictional loss of rotating parts, improve the long-term operational reliability of the storage mechanism, thereby extending the service life of the entire additive manufacturing equipment and reducing equipment maintenance costs.

[0144] Furthermore, the limiting part 16 includes a first slot 161 and a second slot 162. The first slot 161 is arranged along an axis parallel to the mounting hole 15, and the second slot 162 is arranged around the axis of the mounting hole 15. The first slot 161 communicates with the second slot 162.

[0145] The nozzle assembly 20 includes a locking post 21 that protrudes radially from the nozzle. The locking post 21 can enter the first locking groove 161 radially along the annular body 10, and rotate circumferentially along the annular body 10 to enter the second locking groove 162 at the position where the first locking groove 161 and the second locking groove 162 are connected.

[0146] The first slot 161 of the limiting part 16 is set along the axis of the mounting hole 15 and forms a precise fit with the radial locking post 21 on the nozzle of the nozzle assembly 20. When the nozzle assembly 20 is stored, the locking post 21 can smoothly enter the first slot 161 along the axial direction of the annular body 10. The first slot 161 plays a clear guiding role in this process, which can effectively correct the circumferential offset of the locking post 21 and avoid interference between the locking post 21 and the edge of the slot due to positioning deviation. This ensures that the nozzle assembly 20 accurately enters the storage position according to the preset trajectory, reducing the difficulty of installation operation.

[0147] The second slot 162 is positioned around the axis of the mounting hole 15 and communicates with the first slot 161. After the locking post 21 is in place along the first slot 161, the locking post 21 can smoothly enter the second slot 162 through the circumferential rotation of the annular body 10 or the nozzle assembly 20. At this time, the second slot 162 and the locking post 21 form a stable axial limiting relationship. With the help of the mechanical interlocking structure of the slot and the locking post 21, the axial displacement of the nozzle assembly 20 can be effectively limited. Combined with the guiding and positioning effect of the first slot 161, a complete limiting logic of "axial guidance - rotation around the axis - axial locking" is formed. Structurally, the risk of the nozzle assembly 20 coming loose during storage, switching and equipment operation is eliminated, and the reliability of the storage and fixation of the nozzle assembly 20 is improved.

[0148] In some exemplary embodiments of this application, when the storage mechanism further includes a force-applying mechanism 30, the force-applying mechanism 30 is a magnetic body 31, and the snap-fit ​​post 21 and / or the entire nozzle is made of a magnetically attractive material. The magnetic body 31 generates a magnetic attraction effect to attract the snap-fit ​​post 21 and / or the entire nozzle.

[0149] The force-applying mechanism 30 is located at the end of the second slot 162 that is away from the first slot 161.

[0150] By setting the force-applying mechanism 30 as a magnetic body 31, and using a magnetically absorbable material to make the snap-fit ​​post 21 and / or the entire nozzle, the magnetic attraction generated by the magnetic body 31 is used to achieve the adsorption and fixation of the nozzle assembly 20. Magnetic adsorption does not require complex mechanical structure contact and can form a stable force in a non-contact manner. This avoids the rigid collisions and wear that may occur with traditional mechanical locking, and can also adapt to slight dimensional deviations of the snap-fit ​​post 21 or the nozzle, improving the compatibility of fixation.

[0151] Meanwhile, the magnetic body 31 is located at the end of the second slot 162 away from the first slot 161. When the locking post 21 is guided into the second slot 162 along the first slot 161 and rotates to the end of the second slot 162, the magnetic attraction can precisely act on the key position of the limiting fixation, forming a dual guarantee of "mechanical limiting + magnetic reinforcement". This layout concentrates the magnetic force on the final fixed position of the locking post 21 in the second slot 162, effectively preventing the nozzle assembly 20 from retreating from the second slot 162 due to vibration or other factors during the rotation of the annular body 10 or the operation of the equipment, further enhancing the reliability of the limiting fixation and ensuring that the nozzle assembly 20 remains stable during storage and switching.

[0152] In addition, the magnetic fixing method is convenient to operate. When picking up the nozzle assembly 20, only a moderate external force is needed to overcome the magnetic attraction, which balances the fixing firmness and the ease of installation and removal, thus optimizing the overall operating experience.

[0153] In some exemplary embodiments of this application, multiple locking posts 21 are arrayed around the axis of the nozzle, multiple sets of locking posts 21 are set corresponding to the first locking slot 161 and the second locking slot 162, and / or multiple sets of locking posts 21 are set corresponding to the force application mechanism 30.

[0154] The corresponding engagement of multiple locking posts 21 with multiple sets of locking slots enables multi-point limiting and synergistic effects between the nozzle assembly 20 and the storage mechanism. After the arrayed locking posts 21 are embedded into the corresponding first locking slot 161 and rotated into the second locking slot 162, they can form uniform limiting constraints from multiple positions in the circumference, avoiding the problem of force concentration when limiting at a single point.

[0155] Multiple force-applying mechanisms 30 (such as magnetic bodies 31) are set with multiple locking posts 21, which can apply uniform adsorption and fixing force to the nozzle assembly 20 from multiple points. This, together with the mechanical limiting of multiple sets of slots, forms a dual fixing mode of "multi-point mechanical limiting + multi-point magnetic reinforcement". This synergistic effect can significantly improve the stability of the nozzle assembly 20 in the storage state. Even when the annular body 10 rotates for switching or the equipment vibrates during operation, it can effectively prevent the nozzle assembly 20 from loosening or shifting, ensuring the long-term reliability of the limiting and fixing state, and providing a solid guarantee for the precise nozzle switching and stable operation of additive manufacturing equipment.

[0156] It should be understood that this application is not limited to the detailed structure and arrangement of the components proposed in this application. This application can have other embodiments and can be implemented and executed in various ways. The foregoing variations and modifications fall within the scope of this application. It should be understood that the disclosure and definition of this application extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this application. The embodiments described in this application illustrate the best known mode for implementing this application and will enable those skilled in the art to utilize this application.

Claims

1. A storage mechanism for storing nozzle assemblies in additive manufacturing equipment, characterized in that, The storage mechanism includes: The annular body has an outer peripheral surface and an inner peripheral surface arranged coaxially, and a top surface and a bottom surface arranged in parallel. The annular body has a plurality of mounting holes arranged radially. One end of each mounting hole is located on the outer peripheral surface, and the other end extends toward the inner peripheral surface. Adjacent mounting holes are spaced apart. The top surface and / or the bottom surface of the annulus are provided with limiting portions. The top surface and / or bottom surface of the ring are provided with a plurality of through holes at even intervals, the through holes extending along the axial direction of the ring body and penetrating the ring body; When the nozzle assembly is placed in the mounting hole, the limiting part limits and fixes the nozzle assembly.

2. The storage mechanism according to claim 1, characterized in that, The limiting part is provided with a first slot and a second slot. The first slot is arranged along an axis parallel to the mounting hole, and the second slot is arranged around the axis of the mounting hole. The first slot communicates with the second slot.

3. The storage mechanism according to claim 2, characterized in that, One mounting hole corresponds to two limiting parts, the first slot of one limiting part is provided on the top surface of the ring, the first slot of the other limiting part is provided on the bottom surface of the ring, and the second slots of the two limiting parts are symmetrically arranged around the axis of the mounting hole.

4. The storage mechanism according to claim 2, characterized in that, The storage mechanism also includes a force-applying mechanism, which is fixedly disposed on the annular body. When the nozzle assembly is stored in the mounting hole, the force-applying mechanism generates a force that acts on the nozzle assembly to limit and fix the nozzle assembly to the limiting part.

5. The storage mechanism according to claim 4, characterized in that, The force-applying mechanism includes a plurality of magnetic bodies that are arranged one-to-one with the mounting holes. The top surface and / or the bottom surface of the ring are provided with a plurality of fixing grooves that correspond one-to-one with the magnetic bodies. The magnetic bodies are embedded and fixed in the corresponding fixing grooves, and the magnetic attraction range of the magnetic bodies covers the corresponding limiting part.

6. The storage mechanism according to claim 1, characterized in that, The storage mechanism further includes a drive base, which includes a fixed shaft and a drive unit. The annular body is rotatably connected to the fixed shaft, and the drive unit is fixedly connected to the annular body.

7. The storage mechanism according to claim 6, characterized in that, The driving part is a driven gear. A plurality of positioning pins and fasteners with axes parallel to the axis of the annular body are provided between the driven gear and the annular body. The positioning pins are used for circumferential positioning of the driven gear and the annular body. The driven gear and the annular body are fixedly connected by the fasteners.

8. The storage mechanism according to claim 7, characterized in that, The drive seat is also provided with a bearing, the inner ring of which abuts against the fixed shaft, and the annular body and / or the driven gear abuts against the outer ring of the bearing.

9. An additive manufacturing apparatus, characterized in that, The additive manufacturing equipment includes a nozzle assembly and a storage mechanism as described in any one of claims 1 to 8, wherein a limiting portion of the storage mechanism is used to limit and fix the nozzle assembly when the nozzle assembly is inserted into the mounting hole of the storage mechanism.

10. The additive manufacturing equipment according to claim 9, characterized in that, The limiting part includes a first slot and a second slot. The first slot is arranged along an axis parallel to the mounting hole, and the second slot is arranged around the axis of the mounting hole. The first slot communicates with the second slot. The nozzle of the nozzle assembly includes a snap-fit ​​post that protrudes radially therefrom. The snap-fit ​​post is capable of entering the first slot radially along the annular body and rotating circumferentially along the annular body into the second slot at the position where the first slot and the second slot are connected.

11. The additive manufacturing equipment according to claim 10, characterized in that, When the storage mechanism further includes a force-applying mechanism, the force-applying mechanism is a magnetic body, and the locking post and / or the entire nozzle is made of a magnetically attractive material. The magnetic body generates a magnetic attraction effect to attract the locking post and / or the entire nozzle. The force-applying mechanism is located at the end of the second slot away from the first slot.

12. The additive manufacturing equipment according to claim 11, characterized in that, The locking pins are arranged in an array around the axis of the nozzle, and the locking pins are arranged in multiple groups corresponding to the first and second locking slots, and / or the force application mechanism is arranged in multiple groups corresponding to the locking pins.

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