Extrusion assembly suitable for 3D printer, tool head and 3D printer

Abstract

The utility model discloses an extrusion assembly suitable for a 3D printer, a tool head and the 3D printer. The extrusion assembly comprises a mounting shell, a first metal mounting piece, a transmission piece and an extrusion piece. A through hole is formed in the mounting shell; the first metal mounting piece is arranged in the through hole, a motor mounting hole and a transmission piece mounting hole are formed in the first metal mounting piece, and the first metal mounting piece and the mounting shell are integrally formed; and an output shaft of the motor penetrates through the motor mounting hole. The transmission piece is installed in the transmission piece installation hole, and an output shaft of the motor is connected with the transmission piece. And the transmission part and the extrusion part are oppositely arranged, so that the printing supplies penetrate through the space between the transmission part and the extrusion part and are transmitted to the hot end assembly. Thus, in the running process of the transmission piece and the motor, the reverse acting force transmitted by the transmission piece to the first metal installation piece cannot cause deformation of the first metal installation piece, so that it is ensured that the relative position between the transmission piece and the motor is stable and meets the requirement, and it is ensured that the transmission efficiency between the transmission piece and the motor can be improved.

Description

Technical Field

[0001] This application relates to the field of 3D printer technology, and more specifically, to an extrusion assembly, tool head, and 3D printer suitable for use in a 3D printer. Background Technology

[0002] The printer's extrusion assembly is responsible for pushing the printing filament to the hot end assembly. The extrusion assembly includes a motor and a transmission mechanism. The motor drives the transmission mechanism to push the printing filament to the hot end assembly, so the power transmission between the motor and the transmission mechanism is crucial. Utility Model Content

[0003] This application provides an extrusion assembly, tool head, and 3D printer suitable for use in 3D printers.

[0004] This application provides an extrusion assembly for a 3D printer. The 3D printer includes a tool head, and the extrusion assembly is mounted on the tool head. The tool head also houses a motor and a hot-end assembly. Printing filament is conveyed to the hot-end assembly via the extrusion assembly. The extrusion assembly includes a mounting housing, a first metal mounting member, a transmission member, and an extruder. The mounting housing has a through hole. The first metal mounting member is disposed within the through hole and has a motor mounting hole and a transmission member mounting hole. The first metal mounting member is integrally formed with the mounting housing. The output shaft of the motor passes through the motor mounting hole. The transmission member is mounted in the transmission member mounting hole, and the output shaft of the motor is connected to the transmission member. The transmission member and the extruder are disposed opposite each other, allowing the printing filament to pass between the transmission member and the extruder and be transferred to the hot-end assembly.

[0005] In some embodiments, the transmission component includes a bearing, a first gear, and a first extrusion component, the extrusion component includes a second extrusion component, the first gear and the first extrusion component are disposed on the bearing, the first gear is drively connected to the output shaft of the motor, and the first extrusion component and the second extrusion component are disposed opposite to each other so that the printing consumable passes between the first extrusion component and the second extrusion component.

[0006] In some embodiments, the first extrusion sub-component and the second extrusion sub-component are drive-connected.

[0007] In some embodiments, the transmission component further includes a second gear, the second gear, the first gear, and the first extrusion component are disposed on the bearing; the extrusion component further includes a third gear, the second gear meshes with the third gear, and the third gear is coaxially connected to the second extrusion component.

[0008] In some embodiments, the extrusion member further includes a spring connected to the second extrusion sub-member to move the second extrusion sub-member closer to or further away from the first extrusion sub-member.

[0009] In some embodiments, the motor mounting hole includes an output shaft mounting hole, a first fixing part, and a second fixing part. The output shaft of the motor passes through the output shaft mounting hole. The first fixing part and the second fixing part are arranged along the width direction of the extrusion assembly and correspond to the two sides of the motor. The motor is mounted on the first metal mounting member through the first fixing part and the second fixing part.

[0010] In some embodiments, the first fixing part, the second fixing part, and the output shaft mounting hole are on the same straight line along the width direction of the extrusion assembly, and the first fixing part and the second fixing part are symmetrically distributed with the output shaft mounting hole as the center.

[0011] In some embodiments, the motor mounting hole further includes a third fixing part, which is not on the same straight line as the first fixing part along the width direction of the extrusion assembly, and the motor is also mounted to the first metal mounting member through the third fixing part.

[0012] In some embodiments, the line connecting the third fixing part and the output shaft is perpendicular to the line connecting the first fixing part and the second fixing part.

[0013] In some embodiments, the mounting housing has a first positioning member corresponding to the motor on the side facing the motor, and the motor has a mating part that mates with the first positioning member.

[0014] In some embodiments, the first positioning member is a protrusion, the mating part is a groove, and the groove is disposed facing the surface of the mounting housing.

[0015] In some embodiments, the mounting housing is a plastic part, and the first metal mounting part is integrally formed with the mounting housing by in-mold injection molding.

[0016] The tool head provided in this embodiment includes a tool head housing, a motor, an extrusion assembly, and a hot end assembly. The extrusion assembly includes a mounting housing, a first metal mounting member, a transmission member, and an extruder; the mounting housing has a through hole; the first metal mounting member is disposed within the through hole, and has a motor mounting hole and a transmission member mounting hole, and is integrally formed with the mounting housing; the output shaft of the motor passes through the motor mounting hole; the transmission member is mounted in the transmission member mounting hole, and the motor output shaft is connected to the transmission member; printing consumables pass between the transmission member and the extruder. The hot end assembly is connected to the extrusion assembly, and both the hot end assembly and the extrusion assembly are mounted on the tool head housing. Printing consumables pass between the transmission member and the extruder and are transferred to the hot end assembly.

[0017] In some embodiments, the extrusion assembly includes a motor and a transmission component. The motor is mounted in the motor mounting hole and includes an output shaft. The transmission component is mounted in the transmission component mounting hole, and the output shaft of the motor is connected to the transmission component. The transmission component includes a first transmission module and a second transmission module. The first transmission module includes a bearing, a first gear, and a second extrusion component. The first gear and the second extrusion component are disposed on the bearing. The first gear meshes with the output shaft of the motor. The second transmission module includes a first extrusion component. The first extrusion component and the second extrusion component at least partially abut against each other. The feed tube passes through the gap between the second extrusion component and the first extrusion component.

[0018] In some embodiments, the motor mounting hole includes an output shaft mounting hole, a first fixing part, and a second fixing part. The output shaft of the motor passes through the output shaft mounting hole. The first fixing part and the second fixing part are arranged along the width direction of the extrusion assembly and correspond to the two sides of the motor. The motor is mounted on the first metal mounting member through the first fixing part and the second fixing part.

[0019] In some embodiments, the first fixing part, the second fixing part, and the output shaft mounting hole are on the same straight line along the width direction of the extrusion assembly, and the first fixing part and the second fixing part are symmetrically distributed with the output shaft mounting hole as the center.

[0020] In some embodiments, the motor mounting hole further includes a third fixing part, which is not on the same straight line as the first fixing part along the width direction of the extrusion assembly, and the motor is also mounted to the first metal mounting member through the third fixing part.

[0021] In some embodiments, the line connecting the third fixing part and the output shaft is perpendicular to the line connecting the first fixing part and the second fixing part.

[0022] In some embodiments, the mounting housing has a first positioning member corresponding to the motor on the side facing the motor, and the motor has a mating part that mates with the first positioning member.

[0023] In some embodiments, the first positioning member is a protrusion, the mating part is a groove, and the groove is disposed facing the surface of the mounting housing.

[0024] In some embodiments, the tool head includes a second metal mount that is connected to the hot end assembly; the second metal mount is integrally formed with the tool head housing.

[0025] In some embodiments, the tool head further includes a hot end assembly base, the hot end assembly being detachably mounted on the hot end assembly base; the hot end assembly base is fixedly connected to the second metal mounting member.

[0026] In some embodiments, the first metal mounting member and the second metal mounting member are in-mold die castings.

[0027] In some embodiments, the tool head further includes a fan and a sealing baffle, the fan being mounted near the hot end assembly with its outlet facing the hot end assembly; the sealing baffle surrounding the fan inlet and the lower surface of the tool head near the hot end assembly.

[0028] In some embodiments, the tool head housing includes a receiving space, the tool head also includes a circuit board disposed in the receiving space, the fan is connected to the bottom of the tool head housing, and the air inlet of the fan communicates with the receiving space.

[0029] In some embodiments, a second positioning element is provided on the surface of the extrusion assembly facing the tool head housing, and a positioning hole is provided on the surface of the tool head housing facing the extrusion assembly, wherein the second positioning element matches the positioning hole.

[0030] In this application, the extrusion assembly, tool head, and 3D printer applicable to 3D printers, the first metal mounting part of the extrusion assembly is integrally formed with the mounting housing to improve the installation stability between the first metal mounting part and the mounting housing. Unlike extrusion assemblies which are all plastic parts, the mounting housing in this application can be plastic, but the first metal mounting part is metal, and the two are integrally formed. This can mitigate the deformation caused by injection molding when the extrusion assembly is made of plastic. It avoids the deformation caused by injection molding of the extrusion assembly, which can lead to deviation between the motor's output shaft and the central axis of the transmission component, resulting in unstable transmission connection between the motor's output shaft and the transmission component, or inaccurate motor drive. Therefore, this application can ensure the transmission connection between the motor's output shaft and the transmission component, as well as the accuracy of the motor drive. The first metal mounting part is made of metal, has high rigidity, and is not easily deformed. Both the transmission component and the motor are mounted within the first metal mounting component. This design ensures that during operation, the reverse force transmitted from the transmission component to the first metal mounting component does not cause deformation of the first metal mounting component. This guarantees a stable and compliant relative position between the transmission component and the motor, ensuring smooth transmission between them. For example, it ensures optimal meshing between the transmission component and the motor, thereby improving transmission efficiency. This also ensures that the transmission component and the extrusion component can stably and efficiently extrude printing filament, thus improving the printing effect of the hot-end assembly.

[0031] Additional aspects and advantages of embodiments 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 embodiments of this application. Attached Figure Description

[0032] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0033] Figure 1 This is a schematic diagram of the structure of a 3D printer according to some embodiments of this application;

[0034] Figure 2 This is a three-dimensional structural diagram of the tool head according to certain embodiments of this application;

[0035] Figure 3 yes Figure 2 The diagram shows an exploded view of the tool head.

[0036] Figure 4 yes Figure 2 A partial structural diagram of the extrusion assembly of the tool head shown;

[0037] Figure 5 yes Figure 2A partial structural diagram of the extrusion assembly of the tool head shown;

[0038] Figure 6 yes Figure 5 An exploded view of the extrusion assembly of the tool head shown;

[0039] Figure 7 yes Figure 5 The diagram shows the structure of the first transmission module of the tool head.

[0040] Figure 8 yes Figure 5 A partial structural diagram of the transmission and extrusion components of the tool head shown;

[0041] Figure 9 yes Figure 5 The diagram shows the structural structure of the tool head housing.

[0042] Figure 10 yes Figure 9 An exploded view of the tool head housing shown.

[0043] Explanation of key component symbols:

[0044] 1000, 3D printer;

[0045] 100. Tool head; 200. Guide component; 300. Printing platform; 400. Motion device;

[0046] 10. Extrusion assembly; 11. Mounting housing; 111. Through hole; 12. First metal mounting part; 121. Motor mounting hole; 1211. Output shaft mounting hole; 1212. First fixing part; 1213. Second fixing part; 1214. Third fixing part; 122. Transmission component mounting hole; 13. Transmission component; 131. Bearing; 132. First gear; 133. First extrusion sub-component; 134. Second gear; 14. Extrusion component; 141. Second extrusion sub-component; 143. Spring; 15. Second positioning component;

[0047] 20. Motor; 21. Output shaft of the motor; 22. First fixing component 22;

[0048] 30. Hot-end assembly;

[0049] 40. Material pipe;

[0050] 50. Tool head housing; 51. Receiving space; 52. Positioning hole;

[0051] 60. Second metal mounting component;

[0052] 70. Fan;

[0053] 80. Sealed baffle. Detailed Implementation

[0054] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0055] In the description of this application, it should be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly. In one example, they can be a fixed connection, a detachable connection, or an integral connection; they can be a mechanical connection, an electrical connection, or a connection that allows communication between them; they can be a direct connection or an indirect connection through an intermediate medium; they can be the internal connection of two elements or the interaction between two elements.

[0057] In embodiments of this application, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] Please see Figures 1 to 3 and Figure 8This application provides an extrusion assembly 10 suitable for a 3D printer 1000. The 3D printer 1000 includes a tool head 100, the extrusion assembly 10 is mounted on the tool head 100, and the tool head 100 also has a motor 20 and a hot end assembly 30 installed therein; the printing consumable is conveyed to the hot end assembly 30 via the extrusion assembly 10.

[0059] The extrusion assembly 10 includes a mounting housing 11, a first metal mounting member 12, a transmission member 13, and an extruder 14. The mounting housing 11 has a through hole 111. The first metal mounting member 12 is disposed within the through hole 111, and has a motor mounting hole 121 and a transmission member mounting hole 122, and is integrally formed with the mounting housing 11; the motor mounting hole 121 passes through the output shaft 21 of the motor 20. The transmission member 13 is mounted in the transmission member mounting hole 122, and the output shaft 21 of the motor 20 is connected to the transmission member 13. The transmission member 13 and the extruder 14 are arranged opposite each other, so that printing consumables pass between the transmission member 13 and the extruder 14 and are transferred to the hot end assembly 30.

[0060] Specifically, a 3D printer, also known as a three-dimensional printer, is a manufacturing device that uses a layer-by-layer deposition method to build up materials to form a three-dimensional solid. Its working principle can be simply described as follows: using special materials, through precisely controlled nozzles or other methods, the material is deposited layer by layer according to preset three-dimensional model data, ultimately constructing a three-dimensional solid prototype of the object. Figure 1 This is merely a structural example of a 3D printer 1000. The extrusion assembly 10 and tool head 100 of this application can also be applied to printers with other structures, such as core XY structure 3D printers or cantilever structure 3D printers, etc. Figure 1 This should be understood as an example of printer structure, not as a limitation on the structure of the 3D printer 1000.

[0061] The 3D printer 1000 may include a tool head 100, a feed tube 40, and a feeding assembly for supplying printing filament to the feed tube 40. The tool head 100 is equipped with an extrusion assembly 10, a motor 20, and a hot-end assembly 30. The extrusion assembly 10 is connected to the motor 20 to drive its operation. The feed tube 40 passes through the extrusion assembly 10, and the extrusion assembly 10 drives the printing filament within the feed tube 40 to the hot-end assembly 30. The hot-end assembly 30 is equipped with a heating element that heats the printing filament and outputs it onto the printing platform 300 of the 3D printer 1000 to complete the printing process.

[0062] The extrusion assembly 10 includes a mounting housing 11, a first metal mounting member 12, a transmission member 13, and an extrusion member 14. The mounting housing 11 has a through hole 111, and the first metal mounting member 12 is disposed within the through hole 111. The first metal mounting member 12 has a motor mounting hole 121 and a transmission member mounting hole 122, and the first metal mounting member 12 is integrally formed with the mounting housing 11 to improve the connection stability between the first metal mounting member 12 and the mounting housing 11. Both the mounting housing 11 and the first metal mounting member 12 are structures in the extrusion assembly 10 used to assemble and fix other components. Both have corresponding mounting holes, and other components in the extrusion assembly 10 can be mounted on the mounting housing 11 or the first metal mounting member 12 through the mounting holes. For example, the extrusion assembly 10 also includes a feed support, into which the feed tube 40 extends to support the feed tube 40, facilitating the flow of printing consumables in the feed tube 40. The feed bracket can be installed in the mounting housing 11, the transmission component 13 is installed in the first metal mounting component 12 through the transmission component mounting hole 122, and the motor 20 is installed in the first metal mounting component 12 through the motor mounting hole 121.

[0063] The motor mounting hole 121 allows the output shaft 21 of the motor 20 to pass through. The transmission component 13 is mounted in the transmission component mounting hole 122, and the output shaft 21 of the motor 20 can pass through the motor mounting hole 121 and be connected to the transmission component 13. The transmission component 13 and the extruder 14 are arranged opposite to each other, with a certain gap between them to allow the material tube 40 to pass through.

[0064] In one embodiment, there is no transmission relationship between the transmission member 13 and the extruder 14. When the motor 20 is started, the transmission member 13 rotates and applies a driving force to the feed tube 40 toward the hot end assembly 30, causing the printing consumable inside the feed tube 40 to move toward the hot end assembly 30. At this time, the extruder 14 can apply a frictional force to the printing consumable inside the feed tube 40. Under the action of the driving force of the transmission member 13 and the frictional force of the extruder 14, the printing consumable passes between the transmission member 13 and the extruder 14 and is transferred to the hot end assembly 30.

[0065] In another embodiment, the extruder 14 is drive-connected to the transmission member 13. For example, both the extruder 14 and the transmission member 13 are gears, and an additional linkage gear is provided between them. The output shaft 21 of the motor 20 is connected to the transmission member 13. When the motor 20 is running, the transmission member 13 rotates, driving the linkage gear to rotate, thereby driving the extruder 14 to rotate. The feed tube 40 passes between the transmission member 13 and the extruder 14, so that when the transmission member 13 and the extruder 14 rotate, they apply a force to the printing filament, causing the printing filament to pass between the transmission member 13 and the extruder 14 and be transferred to the hot end assembly 30.

[0066] Therefore, during the operation of the extrusion assembly 10, the transmission component 13 continuously applies pressure to the feed tube 40, causing the transmission component 13 itself to experience a reverse force. This reverse force is transmitted to the mounting component on which the transmission component 13 is mounted. In the prior art, both the motor 20 and the transmission component 13 are mounted on plastic mounting components made of plastic. These plastic mounting components have low rigidity, and the reverse force easily causes deformation, altering the relative positions of the motor 20 and the transmission component 13, thus affecting the transmission efficiency between them. For example, when the output shaft 21 of the motor 20 meshes with the first gear 132 in the transmission component 13, the central axis of the output shaft 21 of the motor 20 needs to be parallel to the central axis of the first gear 132 to ensure optimal meshing. Simultaneously, during printing, the amount of material fed needs to be detected. The number of rotations of the first gear 132 needs to be determined based on the number of rotations of the motor 20, thereby determining the amount of material fed by the extrusion assembly 10. When the plastic mounting parts are deformed, the central axis of the output shaft 21 of the motor 20 will not be parallel to the central axis of the first gear 132. The meshing relationship between the output shaft 21 of the motor 20 and the first gear 132 will be poor, which will cause the motor 20 to run idle. It will also cause uneven force between the motor 20 and the first gear 132, thereby reducing the transmission efficiency. At the same time, it will also cause inaccurate feeding and affect the printing quality.

[0067] The first metal mounting component 12 is made of metal and is a die-cast part, which makes the first metal mounting component 12 highly rigid. The reverse force transmitted from the transmission component 13 to the mounting component cannot easily cause the first metal mounting component 12 to deform, thus ensuring that the central axis of the output shaft 21 of the motor 20 is always parallel to the central axis of the first gear 132. This makes the relative position of the motor 20 and the transmission component 13 stable and meets the requirements, and the meshing relationship between the output shaft 21 of the motor 20 and the first gear 132 is better, thereby ensuring high transmission efficiency between the motor 20 and the transmission component 13. At the same time, it can also ensure accurate feeding, thereby improving printing quality.

[0068] The mounting housing 11 can be made of plastic, meaning it is a plastic component, to reduce its cost. Alternatively, the mounting housing 11 can be made of metal to increase its rigidity and ensure it does not deform.

[0069] The mounting housing 11 and the first metal mounting component 12 are integrally formed. It should be noted that... Figure 6The description is only used to illustrate the specific structure of the mounting housing 11 and the first metal mounting part 12. In reality, the mounting housing 11 and the first metal mounting part 12 are integral, not two separate structures. For example, the first metal mounting part 12 is integrally formed with the mounting housing 11 through an in-mold injection molding process, that is, the first metal mounting part 12 is an in-mold die-casting part, which can improve the integration and reliability of the extrusion assembly 10. In-mold injection molding is a process that tightly bonds metal and plastic. Its working principle is to inject plastic into one side of the mold and add metal on the other side. When the plastic melts, the metal also thermally fuses into the plastic core, thereby achieving a tight bond between the metal and plastic. In manufacturing the extrusion assembly 10, injection molding is performed first to generate the mounting housing 11 made of plastic. The mounting housing 11 has a through hole 111, and then metal is injected into the through hole 111 to generate the first metal mounting part 12 as a die-casting part within the through hole 111. This application does not limit the order in which the first metal mounting hole 12 and the mounting housing 11 are integrally formed; any production process / sequence that can achieve the integral forming of the two is within the protection scope of this application. In this way, the rigidity of the first metal mounting component 12 can be improved on the one hand, and the installation stability of the mounting housing 11 and the first metal mounting component 12 can be improved on the other hand, thereby ensuring that the first metal mounting component 12 is not easily deformed, and thus ensuring that the relative position of the motor 20 and the transmission component 13 is stable and meets the requirements, and the transmission efficiency between the motor 20 and the transmission component 13 is high.

[0070] In this embodiment, the first metal mounting member 12 of the extrusion assembly 10 is integrally formed with the mounting housing 11 to improve the installation stability between the first metal mounting member 12 and the mounting housing 11. Unlike extrusion assemblies which are all made of plastic, the mounting housing 11 in this application can also be made of plastic, but the first metal mounting member 12 is made of metal. The integral forming of the two improves the deformation caused by injection molding, which is common in extrusion assemblies where the entire assembly is made of plastic. This avoids the deformation caused by injection molding, which can lead to a misalignment between the output shaft 21 of the motor 20 and the central axis of the transmission component 13, resulting in unstable transmission connection between the output shaft 21 of the motor 20 and the transmission component 13, or inaccurate motor drive. Therefore, this application ensures the transmission connection between the output shaft 21 of the motor 20 and the transmission component 13, as well as the accuracy of motor drive. The first metal mounting member 12 is made of metal and has high rigidity, making it less prone to deformation. Both the transmission component 13 and the motor 20 are mounted in the first metal mounting component 12. This design ensures that during operation, the reverse force transmitted from the transmission component 13 to the first metal mounting component 12 does not cause deformation of the first metal mounting component 12. This guarantees a stable and compliant relative position between the transmission component 13 and the motor 20, ensuring smooth transmission between them. For example, it ensures optimal meshing between the transmission component 13 and the motor 20, thereby improving transmission efficiency. This also ensures that the transmission component 13 and the extruder 14 can stably and efficiently extrude printing filament, thus improving the printing effect of the hot-end assembly 30.

[0071] Please see Figure 2 , Figure 4 , Figure 7 and Figure 8 In some embodiments, the transmission member 13 includes a bearing 131, a first gear 132, and a first extrusion member 133, and the extrusion member 14 includes a second extrusion member 141. The first gear 132 and the first extrusion member 133 are disposed on the bearing 131. The first gear 132 is connected to the output shaft 21 of the motor 20. The first extrusion member 133 and the second extrusion member 141 are disposed opposite to each other so that the printing consumable passes between the first extrusion member 133 and the second extrusion member 141.

[0072] Specifically, the first gear 132 and the first extrusion component 133 are fixedly mounted on the bearing 131 to form a transmission component 13. If one gear in the transmission component 13 rotates, it will drive the bearing 131 to rotate, thereby driving the other gear to rotate. The first gear 132 is connected to the output shaft 21 of the motor 20; the two can mesh directly, or a linkage gear can be added between them to enable a transmission connection. The central axis of the first gear 132 is parallel to the central axis of the output shaft 21 of the motor 20 to ensure stable transmission between the first gear 132 and the output shaft 21 of the motor 20. It can be understood that when the output shaft 21 of the motor 20 starts to rotate, the first gear 132 will rotate, driving the bearing 131 to rotate, thereby causing the first extrusion component 133 to also start rotating.

[0073] The first extrusion component 133 and the second extrusion component 141 are arranged opposite each other, with a gap between them for the material tube 40 to pass through. For example, the surfaces of the first extrusion component 133 and the second extrusion component 141 are provided with grooves. The material tube 40 passes through the gap between the first extrusion component 133 and the second extrusion component 141, that is, the space between the two grooves. In this way, the first extrusion component 133 and the second extrusion component 141 abut against the material tube 40.

[0074] In one embodiment, there is no transmission relationship between the first extrusion component 133 and the second extrusion component 141. When the motor 20 is started, the first extrusion component 133 rotates and applies a driving force toward the hot end assembly 30 to the feed tube 40, causing the printing consumable inside the feed tube 40 to move toward the hot end assembly 30. At this time, the second extrusion component 141 can apply a frictional force to the printing consumable inside the feed tube 40. Under the action of the driving force of the first extrusion component 133 and the frictional force of the second extrusion component 141, the printing consumable passes between the first extrusion component 133 and the second extrusion component 141 and is transferred to the hot end assembly 30.

[0075] In another embodiment, the second extrusion component 141 is drive-connected to the first extrusion component 133. For example, the transmission component 13 further includes a second gear 134, and the second gear 134, the first gear 132, and the first extrusion component 133 are disposed on the bearing 131; the extrusion component 14 further includes a third gear 142, the second gear 134 meshes with the third gear 142, and the third gear 142 is coaxially connected to the second extrusion component 14. Therefore, when the motor 20 is running, the first gear 132 rotates, which simultaneously drives the second gear 134 and the first extrusion component 133 to rotate, and the second gear 134 drives the third gear 142 to rotate, thereby driving the second extrusion component 141 to rotate. In this way, the first extrusion component 133 and the second extrusion component 141 apply a force to the printing consumable, causing the printing consumable to pass between the first extrusion component 133 and the second extrusion component 141 and be transferred to the hot end assembly 30.

[0076] In summary, during the operation of motor 20, the output shaft 21 of motor 20 will rotate to drive the first gear 132 and the first extrusion component 133 to rotate in sequence. Whether the second extrusion component 141 rotates depends on the specific structure of the extrusion component 14, so that the printing consumable can pass between the first extrusion component 133 and the second extrusion component 141.

[0077] Since both the transmission component 13 and the motor 20 are mounted in the first metal mounting component 12, and the first metal mounting component 12 is not easily deformed, the central axis of the first gear 132 and the central axis of the output shaft 21 of the motor 20 can always remain parallel, and the central axis of the first extrusion component 133 and the central axis of the second extrusion component 141 can always remain parallel. This ensures that the meshing relationship between the first gear 132 and the output shaft 21 of the motor 20, and the meshing relationship between the first extrusion component 133 and the second extrusion component 141 are always good. This results in high transmission efficiency between the first gear 132 and the output shaft 21 of the motor 20, and high transmission efficiency between the first extrusion component 133 and the second extrusion component 141. This ensures that the transmission component 13 can stably extrude the printing consumables in the material tube 40, thereby ensuring better printing results.

[0078] In some embodiments, the diameter of the first gear 132 is larger than the diameter of the output shaft 21 of the motor 20. The number of teeth on a gear is proportional to its diameter; the larger the gear, the more teeth it has. Therefore, during the interaction between the pinion and the large gear, the pinion rotates faster than the large gear, causing the large gear to decelerate. Consequently, the first gear 132 can reduce its rotational speed and increase its torque, making the extrusion process more stable and precise.

[0079] Please see Figure 2 and Figure 8 In some embodiments, the extrusion member 14 includes a spring 143 connected to a second extrusion member 141 to move the second extrusion member 141 closer to or further away from the first extrusion member 133. In some feasible embodiments, the spring 143 may abut against the second extrusion member 141 via a connecting rod.

[0080] Specifically, spring 143 is connected to the second extrusion component 141, and spring 143 applies a force toward the first extrusion component 133 to the second extrusion component 141, pushing the second extrusion component 141 closer to the first extrusion component 133, thereby ensuring that the second extrusion component 141 is always in contact with the feed tube 40. Therefore, by changing the force between spring 143 and the second extrusion component 141, the second extrusion component 141 can be moved closer to or away from the first extrusion component 133, thereby changing the force exerted by the second extrusion component 141 on the feed tube 40, ensuring that the printing consumables in the feed tube can be stably delivered to the hot end assembly 30.

[0081] In this way, by changing the elastic force of the spring 143, the second extrusion part 141 can be controlled to move closer to or further away from the first extrusion part 133, so that the printing consumables in the feed tube 40 can be stably delivered to the hot end assembly 30, ensuring the stability and continuity of the extrusion process, thereby improving product quality and production efficiency.

[0082] Please see Figure 4 and Figure 6 In some embodiments, the motor mounting hole 121 includes an output shaft mounting hole 1211, a first fixing part 1212, and a second fixing part 1213. The output shaft 21 of the motor 20 passes through the output shaft mounting hole 1211. The first fixing part 1212 and the second fixing part 1213 are arranged along the width direction X1 of the extrusion assembly 10 and correspond to the two sides of the motor 20. The motor 20 is mounted on the first metal mounting member 12 through the first fixing part 1212 and the second fixing part 1213.

[0083] Specifically, the motor mounting hole 121 on the first metal mounting member 12 includes an output shaft mounting hole 1211, a first fixing part 1212, and a second fixing part 1213. The output shaft 21 passes through the output shaft mounting hole 1211. Since the first metal mounting member 12 is a metal part, the central axis of the output shaft 21 of the motor 20 is always parallel to the central axis of the first gear 132, ensuring that the meshing relationship between the output shaft 21 of the motor 20 and the first gear 132 is always optimal.

[0084] Meanwhile, the first fixing part 1212 and the second fixing part 1213 are both located in the first metal mounting part 12, so that the first fixing part 1212 and the second fixing part 1213 are both located on the same plane, with better flatness, so that the output shaft 21 of the motor 20 will not easily tilt, which helps to ensure that the central axis of the output shaft 21 of the motor 20 is parallel to the central axis of the first gear 132.

[0085] The first fixing part 1212 and the second fixing part 1213 are arranged along the width direction X1 of the extrusion assembly 10 and correspond to the two sides of the motor 20. The motor 20 is mounted on the first metal mounting member 12 via the first fixing part 1212 and the second fixing part 1213. For example, the motor 20 also includes a first fixing member 22 and a second fixing member (not shown in the figure), which are also arranged along the width direction X1 of the extrusion assembly 10 and located on both sides of the motor 20. The first fixing member 22 is combined with the first fixing part 1212, and the second fixing member is combined with the second fixing part 1213, so that the motor 20 can be fixedly mounted on the first metal mounting member 12. For example, both the first fixing part 1212 and the second fixing part 1213 are fixing holes, and the first fixing member 22 and the second fixing member are screws installed on both sides of the motor 20. After the screws are installed into the fixing holes, the motor 20 can be fixedly mounted on the first metal mounting member 12.

[0086] In some embodiments, the motor 20 may include a motor body and a motor housing. The motor body is a component that can output driving force. The motor body is installed inside the motor housing. The first fixing member 22 and the second fixing member are installed on the motor housing so as to protect the motor body by means of the motor housing. At the same time, the motor housing is used to realize the installation of the motor 20 and the first metal mounting member 12.

[0087] In other embodiments, the motor 20 may consist only of the motor body, and the first fixing member 22 and the second fixing member may be mounted on the motor body to reduce the size of the motor 20 while ensuring that the motor 20 can be mounted on the first metal mounting member 12.

[0088] Meanwhile, the first fixing part 1212 and the second fixing part 1213 are arranged along the width direction X1 of the extrusion assembly 10, and the first fixing member 22 and the second fixing member are arranged along the width direction X1 of the extrusion assembly 10, so that the first fixing part 1212 and the first fixing member 22 are combined, and the second fixing part 1213 and the second fixing member are combined, which can limit the movement of the motor 20 in the width direction X1 of the extrusion assembly 10, thereby ensuring that the motor 20 will not be displaced during operation, and thus ensuring that the motor 20 can operate stably.

[0089] Furthermore, the number of the first fixing part 1212, the second fixing part 1213, the first fixing member 22, and the second fixing member are all multiple, for example, two, four, or five, so as to improve the connection stability between the motor 20 and the first metal mounting member 12 by utilizing multiple fixing parts.

[0090] Thus, the motor 20 is locked to the first metal mounting member 12 on both sides along the width direction X1 of the extrusion assembly 10 by corresponding fixing parts and fixing members, thereby improving the installation stability of the motor 20 and helping to limit the displacement of the motor 20 in the width direction X1 of the extrusion assembly 10. At the same time, it can also ensure that after the motor 20 is installed, the output shaft 21 of the motor 20 can mesh with the first gear 132, and the central axis of the output shaft 21 of the motor 20 is parallel to the central axis of the first gear 132, thereby facilitating the improvement of printing quality.

[0091] Please see Figure 4 and Figure 6 In some embodiments, along the width direction X1 of the extrusion assembly 10, the centers of the first fixing portion 1212, the second fixing portion 1213, and the output shaft mounting hole 1211 are on the same straight line, and the first fixing portion 1212 and the second fixing portion 1213 are symmetrically distributed with respect to the output shaft mounting hole 1211. Correspondingly, along the width direction X1 of the extrusion assembly 10, the first fixing member 22, the second fixing member, and the output shaft 21 are on the same straight line, and the first fixing member 22 and the second fixing member are symmetrically distributed with respect to the output shaft 21.

[0092] Therefore, the contact positions of the motor 20 and the first metal mounting member 12 are on the same straight line, and the other two contact positions are symmetrically distributed with the output shaft 21 as the center. This makes the force exerted by the motor 20 on the first metal mounting member 12 more uniform, allowing the force to be applied more evenly to the first metal mounting member 12. The locking force of the first fixing part 1212 and the first fixing member 22, and the locking force of the second fixing part 1213 and the second fixing member, are relatively symmetrical and will not deviate, resulting in a better limiting effect of the motor 20. At the same time, the more uniform force acting on the first metal mounting member 12 can also reduce the deformation of the first metal mounting member 12.

[0093] Please see Figure 4 and Figure 6 In some embodiments, the motor mounting hole 121 further includes a third fixing part 1214. Along the width direction X1 of the extrusion assembly 10, the third fixing part 1214 is not on the same straight line as the first fixing part 1212. The motor 20 is also mounted on the first metal mounting member 12 through the third fixing part 1214.

[0094] Specifically, the motor mounting hole 121 may also be provided with a third fixing part 1214, which may also be a fixing hole. Correspondingly, the motor 20 may be provided with a third fixing member, which may be combined with the third fixing part 1214.

[0095] Along the width direction X1 of the extrusion assembly 10, the third fixing part 1214 and the first fixing part 1212 are not on the same straight line. This can be understood as the third fixing part 1214 and the first fixing part 1212 having different heights along the length direction X2 of the extrusion assembly 10, with the top of the mounting housing 11 as a reference. Thus, the third fixing part 1214 can be used to limit the movement of the motor 20 in the length direction X2 of the extrusion assembly 10.

[0096] Thus, the first fixing part 1212, the second fixing part 1213 and the third fixing part 1214 can be used to limit the movement of the motor 20 in the length direction X2 and the width direction X1 of the extrusion assembly 10, so as to limit it in two mutually perpendicular directions, thereby further increasing the limiting effect of the motor 20.

[0097] Please see Figure 4 and Figure 6 In some embodiments, the line connecting the third fixing part 1214 and the output shaft 21 is perpendicular to the line connecting the first fixing part 1212 and the second fixing part 1213. This makes the distribution of the first fixing part 1212, the second fixing part 1213, and the third fixing part 1214 more symmetrical, thereby ensuring that the force exerted by the motor 20 on the first metal mounting member 12 is more uniform, allowing the force to be applied more evenly to the first metal mounting member 12, thus further reducing the deformation of the first metal mounting member 12.

[0098] Please see Figure 4 In some embodiments, the mounting housing 11 has a first positioning member (not shown) corresponding to the motor 20 on the side facing the motor 20, and the motor 20 has a mating part (not shown) that mates with the first positioning member.

[0099] Specifically, one of the positioning element and the mating part is a protrusion, and the other is a groove, so that the two can be engaged. For example, the first positioning element is a protrusion, and the mating part is a groove, with the groove facing the surface of the mounting housing 11. It can be understood that when the mating part engages with the first positioning element, the motor 20 is considered to be installed in the correct position, thereby achieving precise installation of the motor 20, and the positioning part can restrict the relative movement of the mounting housing 11 and the motor 20. The number of mating parts and the first positioning element can be one or more, and is not limited here.

[0100] In this way, the first positioning component and the mating part can be used to achieve the positioning when installing the motor 20, ensuring that the motor 20 and the motor housing can be accurately aligned and installed, thereby avoiding assembly errors and improving assembly quality.

[0101] Please see Figures 1 to 3 and Figure 8This application provides a tool head 100 suitable for a 3D printer 1000, comprising a tool head housing 50, a motor 20, an extrusion assembly 10, and a hot end assembly 30. The extrusion assembly 10 includes a mounting housing 11, a first metal mounting member 12, a transmission member 13, and an extruder 14. The mounting housing 11 has a through hole; the first metal mounting member 12 is disposed within the through hole, and the first metal mounting member 12 has a motor mounting hole 121 and a transmission member mounting hole 122, and is integrally formed with the mounting housing 11; the output shaft 21 of the motor 20 passes through the motor mounting hole 121; the transmission member 13 is mounted in the transmission member mounting hole 122, the output shaft 21 of the motor 20 is connected to the transmission member 13, and printing consumables pass between the transmission member 13 and the extruder 14. The hot end assembly 30 is connected to the extrusion assembly 10. Both the hot end assembly 30 and the extrusion assembly 10 are mounted on the tool head housing 50. The printing consumable passes between the transmission member 13 and the extrusion member 14 and is transferred to the hot end assembly 30. The printing consumable is heated at the hot end assembly 30 and extruded by the hot end assembly 30.

[0102] The hot end assembly 30 is connected to the extrusion assembly 10, and both the hot end assembly 30 and the extrusion assembly 10 are mounted on the tool head housing 50; the feed tube 40 passes through the extrusion assembly 10 and is connected to the hot end assembly 30. The extrusion assembly 10 is used to drive the printing consumables in the feed tube 40 to move to the hot end assembly 30. The hot end assembly 30 is used to heat the printing consumables and output the printing consumables.

[0103] Specifically, the tool head 100, typically used in a 3D printer 1000, is a key component used to color or transfer data such as text and photographs onto paper or other media. The tool head housing 50 is the external structure of the tool head 100, primarily serving to protect internal components, dissipate heat, and provide structural support. Both the hot-end assembly 30 and the extrusion assembly 10 are mounted within the tool head housing 50. The tool head housing 50 is typically made of a material with good heat dissipation properties (such as aluminum or copper) and may include heat sinks to enhance heat dissipation. The feed tube 40 is the conduit for carrying printing filament within the tool head 100. The feed tube 40 is responsible for maintaining a continuous supply of printing filament and ensuring the stability and continuity of the printing process. The printer 1000 may include a feeding assembly for supplying printing filament to the feed tube 40. The feed tube 40 passes through the extrusion assembly 10, which drives the printing filament within the feed tube 40 to the hot-end assembly 30. The hot end assembly 30 is equipped with a heating element that can heat the printing consumables and output the printing consumables to the printing platform 300 to complete the printing.

[0104] The first metal mounting component 12 is made of metal and is a die-cast part, which makes the first metal mounting component 12 highly rigid. The reverse force transmitted from the transmission component 13 to the mounting component cannot easily cause the first metal mounting component 12 to deform, ensuring that the central axis of the output shaft 21 of the motor 20 is always parallel to the central axis of the first gear 132. This ensures that the relative position of the motor 20 and the transmission component 13 is stable and meets the requirements, and the meshing relationship between the output shaft 21 of the motor 20 and the first gear 132 is better, thereby ensuring high transmission efficiency between the motor 20 and the transmission component 13. At the same time, it can also ensure accurate feeding of the extrusion assembly 10, so as to improve the printing quality of the hot end assembly 30.

[0105] It should be noted that all the above-described embodiments of the structure of the tool head 100 are implementations of the tool head 100 provided in this application, and will not be repeated here for the sake of brevity.

[0106] In this embodiment, the first metal mounting member 12 of the extrusion assembly 10 in the tool head 100 is integrally formed with the mounting housing 11 to improve the installation stability between the first metal mounting member 12 and the mounting housing 11. The first metal mounting member 12 is made of metal and has high rigidity, making it less prone to deformation. The transmission member 13 and the motor 20 are both mounted in the first metal mounting member 12, ensuring that the reverse force transmitted by the transmission member 13 to the first metal mounting member 12 during operation does not cause deformation of the first metal mounting member 12. This ensures that the relative position between the transmission member 13 and the motor 20 is stable and meets requirements, thereby ensuring smooth transmission between the transmission member 13 and the motor 20, such as ensuring good meshing between the transmission member 13 and the motor 20, and thus improving the transmission efficiency between the transmission member 13 and the motor 20. In this way, it can be ensured that the transmission member 13 and the extruder 14 can stably and efficiently extrude printing consumables, thereby improving the printing effect of the hot end assembly 30.

[0107] Please see Figure 3 , Figure 9 and Figure 10 In some embodiments, the tool head 100 includes a second metal mounting member 60, which is integrally formed with the tool head housing 50 and is connected to the hot-end assembly 30. For example, the hot-end assembly 30 can be directly connected to the second metal mounting member 60. Alternatively, the tool head 100 also includes a hot-end assembly base, which is fixedly connected to the second metal mounting member. The hot-end assembly is detachably mounted on the hot-end assembly base, facilitating replacement and repair of the hot-end assembly in case of damage.

[0108] Specifically, the hot-end assembly 30 is installed in the tool head housing 50. When the hot-end assembly 30 applies a force to the feed tube 40, the feed tube 40 also applies a reverse force to the hot-end assembly 30. Therefore, the area in the tool head housing 50 that connects to the hot-end assembly 30 is also at risk of deformation. Deformation of this area can cause the hot-end assembly 30 to shift, thus affecting print quality. In the prior art, the tool head housing 50 is made of plastic, making the area in the tool head housing 50 that connects to the hot-end assembly 30 prone to deformation, thereby reducing print quality.

[0109] The tool head 100 of this application also includes a second metal mounting member 60. The tool head housing 50 can be made of plastic or metal, while the second metal mounting member 60 is made of metal, resulting in high rigidity. The hot end assembly 30 is mounted on the second metal mounting member 60 to ensure that the second metal mounting member 60 will not easily deform during operation, thus preventing the position of the hot end assembly 30 from shifting and improving print quality. The extrusion assembly 10 is mounted on the tool head housing 50 to facilitate the assembly of the tool head 100.

[0110] Furthermore, the second metal mounting component 60 is integrally formed with the tool head housing 50. It should be noted that... Figure 10 The description only illustrates the specific structure of the second metal mounting component 60 and the tool head housing 50. In reality, the second metal mounting component 60 and the tool head housing 50 are integral, not separate structures. Integral molding improves the connection stability between the second metal mounting component 60 and the tool head housing 50, further ensuring that the position of the hot-end assembly 30 does not shift. For example, the second metal mounting component 60 can be integrally molded with the tool head housing 50 via in-mold injection molding, meaning the second metal mounting component 60 is an in-mold die-cast part. This improves the integration and reliability of the tool head 100. When manufacturing the tool head housing 50, injection molding is performed first to create a tool head housing 50 made of plastic. The tool head housing 50 has perforations, and then in-mold injection molding is performed within these perforations to create the second metal mounting component 60, which is a metal part within the perforations. This improves both the rigidity of the second metal mounting component 60 and the installation stability of the tool head housing 50 and the second metal mounting component 60, thereby ensuring that the second metal mounting component 60 is not easily deformed. Furthermore, the mounting housing 11 in this application is a plastic part, and the first metal mounting part 12 is a metal part. Instead of making both the mounting housing 11 and the first metal mounting part 12 into die-cast metal parts, the in-mold injection molding process is used, which can save costs while ensuring the rigidity requirements of the extruded component 10.

[0111] Please see Figure 3In some embodiments, the tool head 100 further includes a fan 70 and a sealing baffle 80. The fan 70 is mounted near the hot end assembly 30, and the air outlet of the fan 70 faces the hot end assembly 30. The sealing baffle 80 surrounds the air inlet of the fan 70 and the lower surface of the tool head 100 near the hot end assembly 30.

[0112] Specifically, the fan 70 is installed near the hot end assembly 30, and the air outlet of the fan 70 faces the hot end assembly 30. For example, the fan 70 has a mounting part, which is installed near the hot end assembly 30. At the same time, it is ensured that the air outlet of the fan 70 faces the hot end assembly 30, so that the fan 70 can reduce the temperature of the printing consumables output by the hot end assembly 30, and ensure that the printing consumables can be cooled down and set quickly.

[0113] Meanwhile, the sealed baffle 80 surrounds the air inlet of the fan 70 and the lower surface of the tool head 100 near the hot end assembly 30 to seal the air inlet of the fan 70 and the lower surface of the tool head 100 near the hot end assembly 30, preventing the sound generated by the air inlet from spreading to the outside, thereby helping to reduce the noise of the fan 70.

[0114] Please see Figure 3 In some embodiments, the tool head housing 50 includes a receiving space 51, the tool head 100 also includes a circuit board disposed in the receiving space 51, the fan 70 is connected to the bottom of the tool head housing 50, and the air inlet of the fan 70 communicates with the receiving space 51.

[0115] Specifically, the tool head housing 50 has an internal receiving space 51 to receive other components of the tool head 100, such as the extrusion assembly 10 or a printed circuit board (PCB). The tool head housing 50 has a through hole that communicates with the receiving space 51, allowing external gas to enter the receiving space 51 through the through hole to cool the components inside the receiving space 51.

[0116] A fan 70 is provided at the bottom of the tool head housing 50. For example, the fan 70 has a mounting part, which is installed at the bottom of the side plate of the tool head housing 50, so that the air inlet of the fan 70 touches the bottom of the tool head housing 50, and the air inlet of the fan 70 communicates with the receiving space 51 of the tool head housing 50. At the same time, the circuit board (PCB board) is provided inside the receiving space 51, for example, it can be provided on the side of the tool head housing 50.

[0117] Under the action of the sealed baffle 80, air can only enter the air inlet of the fan 70 from the receiving space 51. Therefore, the air needs to flow to the receiving space 51 first to cool the various components within it, then flow to the fan 70, and finally flow out from the air outlet of the fan 70 and into the printed part to cool it. The specific airflow direction is as follows: Figure 3 As shown by the gray solid line.

[0118] Thus, when the fan 70 is started, the flow rate of the gas in the containment space 51 can be accelerated, so as to improve the cooling effect on the various components in the containment space 51, especially the cooling effect on the motor 20 of the PCB board or extrusion assembly 10.

[0119] Furthermore, the operation of the fan 70 and the extrusion assembly 10 does not interfere with each other. Therefore, in some embodiments, the 3D printing equipment 100 may only have the extrusion assembly 10 and not the fan 70, or only have the fan 70 and not the extrusion assembly 10.

[0120] In this application, the fan 70 is located near the hot-end assembly 30 to accelerate the cooling of the printing filament extruded from the hot-end assembly 30. The presence of molten material improves print quality, reduces filament stringing and overflow, and prevents warping. Furthermore, the air inlet of the cooling fan 70 is reused to dissipate heat from the PCB board on the tool head 100, improving heat dissipation without adding hardware. This maintains the portability of the tool head 100 while ensuring its operational stability.

[0121] Please see Figure 3 and Figure 4 In some embodiments, the extrusion assembly 10 is provided with a second positioning member 15, and the tool head housing 50 is provided with a positioning hole 52, wherein the second positioning member 15 matches the positioning hole 52.

[0122] Specifically, one or more second positioning members 15 can be provided on the extrusion assembly 10. The second positioning members 15 extend outward in a direction away from the extrusion assembly 10. One or more positioning holes 52 are provided on the tool head housing 50. When the second positioning member 15 extends into the positioning hole 52, the second positioning member 15 can be used to prevent the second positioning member 15 from moving, thereby preventing the extrusion assembly 10 from moving relative to the tool head housing 50. When assembling the extrusion assembly 10 onto the tool head housing 50, the cooperation between the second positioning member 15 and the positioning hole 52 can be used to ensure that the extrusion assembly 10 can be installed in the specified position in the tool head housing 50, thereby achieving precise installation of the extrusion assembly 10. The tool head 100 is finally mounted on the moving rod, which extends horizontally. The tool head 100 moves horizontally to complete the printing. In this way, the movement of the motor 20 in the vertical direction can also be prevented, thereby ensuring that the meshing relationship between the output shaft 21 of the motor 20 and the first gear 132 is always optimal.

[0123] Please see Figure 1 , Figure 2 and Figure 4The 3D printer 1000 provided in this application includes a guide 200 and a tool head 100 of any of the above embodiments. The tool head 100 is slidably connected to the guide 200.

[0124] Specifically, the 3D printer 1000 includes a housing, a tool head 100, a printing platform 300, a guide 200, and a motion device 400. The housing is a structure with cavities (i.e., processing space) to accommodate other components. Other structures of the 3D printer 1000 (such as the printing platform 300) can be housed within this processing space. The housing protects these other structures from easy damage by external forces and ensures that they are not easily disturbed by external factors during operation, thus improving print quality. The specific structure of the housing is not limited; it can be a frame-type housing or a complete box-type housing. A frame-type housing is mainly composed of beams, columns, and other components forming a frame with an internal grid structure. This structural form allows the housing to maintain a certain strength and rigidity while being lightweight and highly flexible. Frame-type housings typically connect various components together through welding, bolting, or riveting to form a single integrated structure. Box-type housings, on the other hand, have a relatively closed structure, usually composed of multiple walls forming a complete enclosed space. This structural form gives the enclosure high performance in housing and protecting internal components. Box-type enclosures are typically manufactured through methods such as casting, welding, or stamping, resulting in high strength and rigidity.

[0125] The tool head 100 is used to output printing material according to the target image to generate a printed part. The tool head 100 can be slidably connected to the guide 200, that is, the tool head 100 can slide on the guide 200. For example, the guide 200 is a crossbar, and the tool head 100 can move on the crossbar so that the tool head 100 can move relative to the printing platform 300.

[0126] The printing platform 300 is a support component of the 3D printer 1000. It provides a stable, robust, and level platform for the printed parts produced by the tool head 100 to adhere stably. The printing platform 300 may include a heated bed, and may further include at least one of a printing panel located on the heated bed and a heated bed support for supporting the heated bed, wherein the heated bed support can elastically support the heated bed or fix it in place. The printing platform 300 generally has a heating function to improve material adhesion and prevent deformation. A motion device 400 is connected to the printing platform 300 and can move the printing platform 300. For example, the motion device 400 includes a motor 2053 and a lead screw with a slider mounted on it. The printing platform 300 is connected to the slider, and the motor 2053 is connected to the lead screw and can drive the lead screw to rotate. By driving the lead screw to rotate, the motor 2053 moves the slider vertically, thereby raising or lowering the printing platform 300. The number of leads can be one, two, three or more; as for the number of drive motors 20, one drive motor 20 can drive one lead screw to rotate, or one drive motor 20 can drive multiple lead screws to rotate in the form of a synchronous belt.

[0127] The extrusion assembly 10 of the tool head 100 includes a transmission component 13, a motor 20, a mounting housing 11, and a first metal mounting component 12. The transmission component 13 and the motor 20 are both mounted on the first metal mounting component 12. The first metal mounting component 12 has high rigidity, which makes it less prone to deformation during the operation of the transmission component 13 and the motor 20. This ensures that the relative position between the transmission component 13 and the motor 20 remains unchanged. For example, it ensures that the first gear 132 and the output shaft 21 of the motor 20 are always meshed, thereby improving the transmission efficiency between the transmission component 13 and the motor 20.

[0128] In the printer 1000 of this embodiment, the first metal mounting member 12 of the tool head 100 is integrally formed with the mounting housing 11 to improve the installation stability between the first metal mounting member 12 and the mounting housing 11. The first metal mounting member 12 is made of metal and has high rigidity, making it less prone to deformation. The transmission member 13 and the motor 20 are both mounted in the first metal mounting member 12, ensuring that the reverse force transmitted by the transmission member 13 to the first metal mounting member 12 during operation does not cause deformation of the first metal mounting member 12. This ensures that the relative position between the transmission member 13 and the motor 20 is stable and meets requirements, thereby ensuring smooth transmission between the transmission member 13 and the motor 20, such as ensuring good meshing between the transmission member 13 and the motor 20, and thus improving the transmission efficiency between the transmission member 13 and the motor 20. In this way, it can be ensured that the transmission member 13 and the extruder 14 can stably and efficiently extrude printing consumables, thereby improving the printing effect of the hot end assembly 30.

[0129] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0131] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An extrusion assembly for a 3D printer, characterized in that, The 3D printer includes a tool head, an extrusion assembly mounted on the tool head, and a motor and a hot end assembly also mounted in the tool head; printing filament is fed to the hot end assembly via the extrusion assembly; The extrusion assembly includes: The mounting housing has a through hole; A first metal mounting component is disposed within the through hole. The first metal mounting component has a motor mounting hole and a transmission component mounting hole, and the first metal mounting component is integrally formed with the mounting housing. The output shaft of the motor passes through the motor mounting hole. A transmission component is mounted in a transmission component mounting hole, and the output shaft of the motor is connected to the transmission component; An extruder, wherein the transmission member is disposed opposite to the extruder, such that the printing filament passes between the transmission member and the extruder and is transferred to the hot end assembly.

2. The extrusion assembly according to claim 1, characterized in that, The transmission component includes a bearing, a first gear, and a first extrusion component. The extrusion component includes a second extrusion component. The first gear and the first extrusion component are disposed on the bearing. The first gear is connected to the output shaft of the motor. The first extrusion component and the second extrusion component are disposed opposite to each other so that the printing consumable passes between the first extrusion component and the second extrusion component.

3. The extrusion assembly according to claim 2, characterized in that, The first extrusion component and the second extrusion component are connected by a drive.

4. The extrusion assembly according to claim 3, characterized in that, The transmission component further includes a second gear, and the second gear, the first gear, and the first extrusion component are disposed on the bearing; the extrusion component further includes a third gear, the second gear meshes with the third gear, and the third gear is coaxially connected to the second extrusion component.

5. The extrusion assembly according to claim 2, characterized in that, The extrusion member also includes a spring connected to the second extrusion sub-member, so as to move the second extrusion sub-member closer to or further away from the first extrusion sub-member.

6. The extrusion assembly according to claim 1, characterized in that, The motor mounting hole includes an output shaft mounting hole, a first fixing part, and a second fixing part. The output shaft of the motor passes through the output shaft mounting hole. The first fixing part and the second fixing part are arranged along the width direction of the extrusion assembly and correspond to the two sides of the motor. The motor is mounted on the first metal mounting part through the first fixing part and the second fixing part.

7. The extrusion assembly according to claim 6, characterized in that, Along the width direction of the extrusion assembly, the first fixing part, the second fixing part, and the output shaft mounting hole are on the same straight line, and the first fixing part and the second fixing part are symmetrically distributed with the output shaft mounting hole as the center.

8. The extrusion assembly according to claim 6, characterized in that, The motor mounting hole also includes a third fixing part. Along the width direction of the extrusion assembly, the third fixing part is not on the same straight line as the first fixing part, and the motor is also mounted to the first metal mounting part through the third fixing part.

9. The extrusion assembly according to claim 8, characterized in that, The line connecting the third fixing part and the output shaft is perpendicular to the line connecting the first fixing part and the second fixing part.

10. The extrusion assembly according to claim 1, characterized in that, The mounting housing has a first positioning member corresponding to the motor on the side facing the motor, and the motor has a mating part that mates with the first positioning member.

11. The extrusion assembly according to claim 10, characterized in that, The first positioning element is a protrusion, the mating part is a groove, and the groove is disposed facing the surface of the mounting housing.

12. The extrusion assembly according to claim 1, characterized in that, The mounting housing is a plastic part, and the first metal mounting part is integrally formed with the mounting housing through an in-mold injection molding process.

13. A tool head, characterized in that, include Tool head housing; Electric motor; An extrusion assembly; the extrusion assembly includes a mounting housing, a first metal mounting member, a transmission member, and an extruder; the mounting housing has a through hole; the first metal mounting member is disposed in the through hole, and the first metal mounting member has a motor mounting hole and a transmission member mounting hole, and the first metal mounting member is integrally formed with the mounting housing; the output shaft of the motor passes through the motor mounting hole; the transmission member is mounted in the transmission member mounting hole, the output shaft of the motor is connected to the transmission member, and printing consumables pass between the transmission member and the extruder; A hot-end assembly is connected to the extrusion assembly. Both the hot-end assembly and the extrusion assembly are mounted on the tool head housing. Printing filament passes between the transmission member and the extrusion member and is transferred to the hot-end assembly.

14. The tool head according to claim 13, characterized in that, The motor mounting hole includes an output shaft mounting hole, a first fixing part, and a second fixing part. The output shaft of the motor passes through the output shaft mounting hole. The first fixing part and the second fixing part are arranged along the width direction of the extrusion assembly and correspond to the two sides of the motor. The motor is mounted on the first metal mounting part through the first fixing part and the second fixing part.

15. The tool head according to claim 14, characterized in that, Along the width direction of the extrusion assembly, the first fixing part, the second fixing part, and the output shaft mounting hole are on the same straight line, and the first fixing part and the second fixing part are symmetrically distributed with the output shaft mounting hole as the center.

16. The tool head according to claim 14, characterized in that, The motor mounting hole also includes a third fixing part. Along the width direction of the extrusion assembly, the third fixing part is not on the same straight line as the first fixing part, and the motor is also mounted to the first metal mounting part through the third fixing part.

17. The tool head according to claim 16, characterized in that, The line connecting the third fixing part and the output shaft is perpendicular to the line connecting the first fixing part and the second fixing part.

18. The tool head according to claim 13, characterized in that, The motor is provided with a mating part, and the mounting housing is provided with a first positioning member corresponding to the motor on the side facing the motor, and the mating part mates with the first positioning member.

19. The tool head according to claim 18, characterized in that, The first positioning element is a protrusion, the mating part is a groove, and the groove is disposed facing the surface of the mounting housing.

20. The tool head according to claim 13, characterized in that, The tool head includes a second metal mounting component, which is connected to the hot end assembly; the second metal mounting component is integrally formed with the tool head housing.

21. The tool head according to claim 20, characterized in that, The tool head also includes a hot end component base, and the hot end component is detachably mounted on the hot end component base; The hot end component base is fixedly connected to the second metal mounting component.

22. The tool head according to claim 20, characterized in that, The first metal mounting component and the second metal mounting component are in-mold die-cast parts.

23. The tool head according to claim 13, characterized in that, The tool head also includes a fan and a sealing baffle. The fan is installed near the hot end assembly, and the air outlet of the fan faces the hot end assembly. The sealing baffle surrounds the air inlet of the fan and the lower surface of the tool head near the hot end assembly.

24. The tool head according to claim 23, characterized in that, The tool head housing includes a receiving space, and the tool head also includes a circuit board disposed in the receiving space. The fan is connected to the bottom of the tool head housing, and the air inlet of the fan communicates with the receiving space.

25. The tool head according to claim 13, characterized in that, The extrusion assembly has a second positioning element on the surface facing the tool head housing, and the tool head housing has a positioning hole on the surface facing the extrusion assembly, with the second positioning element matching the positioning hole.

26. A 3D printer, characterized in that, include: The guide and the tool head according to any one of claims 13-25, wherein the tool head is slidably connected to the guide.

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