Extrusion apparatus and 3D printing device

Abstract

The present application provides an extrusion apparatus and a 3D printing device. The extrusion apparatus comprises a mounting seat, a movable member, an extrusion assembly, and an elastic member; the movable member is rotatably mounted on the mounting seat; the extrusion assembly is configured to extrude and convey a consumable and comprises a first extrusion wheel and a second extrusion wheel; the first extrusion wheel is mounted on the mounting seat, and the second extrusion wheel is mounted on the movable member and is configured to be close to or away from the first extrusion wheel along with the rotation of the movable member; and one end of the elastic member abuts against the mounting seat, and the other end of the elastic member abuts against the movable member so as to apply an elastic force to the movable member, wherein the elastic force is used for enabling the movable member to drive the second extrusion wheel to tightly abut against the first extrusion wheel.

Description

Extrusion devices and 3D printing equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number 202323644652.2, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of 3D printing technology, and in particular to an extrusion device and a 3D printing device. Background Art

[0004] The extruder in most 3D printing devices features two extrusion wheels, which extrude the filament. One extruder wheel is fixed in position, while the other wheel is moved closer to or further away from the fixed wheel via a toggle. The toggle, once moved to a preset position, is locked in place by a snap. During operation, the extruder wheels continuously apply force to the toggle, causing it to retract. This increases the distance between the two extruder wheels, preventing them from operating properly and affecting the reliability of the extruder.

[0005] Summary of the Invention

[0006] The present application provides an extrusion device and a 3D printing device to solve the problem of poor reliability of the extrusion device in the known technology.

[0007] In the first aspect, the present application provides an extrusion device, comprising a mounting seat, a movable part, an extrusion assembly, and an elastic part. The movable part is rotatably mounted on the mounting seat. The extrusion assembly is used to extrude and convey consumables, and comprises a first extrusion wheel and a second extrusion wheel. The first extrusion wheel is mounted on the mounting seat, and the second extrusion wheel is mounted on the movable part, and is used to approach or move away from the first extrusion wheel as the movable part rotates; one end of the elastic part abuts the mounting seat, and the other end abuts the movable part to apply an elastic force to the movable part, and the elastic force is used to enable the movable part to drive the second extrusion wheel to press against the first extrusion wheel.

[0008] In a possible embodiment, the mounting seat includes a first seat body and a second seat body, the movable member is clamped between the first seat body and the second seat body and is rotatably connected to the second seat body, and the elastic member is clamped between the movable member and the first seat body.

[0009] In a possible embodiment, the first base body defines a movable groove, and a mounting shaft is protruded from a side of the movable member close to the first base body, and the mounting shaft is slidably received in the movable groove;

[0010] Along the axial direction of the installation shaft, the length of the installation shaft is greater than the depth of the movable groove. One end of the installation shaft away from the movable member exceeds the first seat body and is installed with the second extrusion wheel.

[0011] In a possible embodiment, along the extension direction of the movable groove, the elastic member is accommodated in the movable groove and is located on the side of the mounting shaft away from the first extrusion wheel, one end of the elastic member abuts against the circumferential surface of the mounting shaft, and the other end abuts against the groove wall of the movable groove.

[0012] In a possible embodiment, a first limiting hole and a second limiting hole are provided at one end of the movable part, and a third limiting hole is provided on the first base body. The third limiting hole is for the limiting part to pass through, and one end of the limiting part passing through the third limiting hole is clamped in the first limiting hole or the second limiting hole.

[0013] In a possible embodiment, a rotating shaft is protruded from one side of the second seat body close to the movable part, and the movable part is provided with a rotating hole. The rotating shaft portion can be rotatably accommodated in the rotating hole, and the rotating hole and the first limiting hole and the second limiting hole are respectively arranged on opposite sides of the mounting axis.

[0014] In a possible implementation manner, the movable member is provided with a first sliding groove, and the first sliding groove is located between the mounting shaft and the first limiting hole and the second limiting hole;

[0015] A sliding column is protruded from one side of the second seat body close to the movable member, and the sliding column portion can be slidably received in the first sliding groove.

[0016] In a possible embodiment, the movable member is provided with a second sliding groove, and the second sliding groove and the first sliding groove are provided on opposite sides of the rotating shaft;

[0017] A connecting shaft is protruded from one side of the second seat body close to the movable member. The connecting shaft portion is slidably received in the second sliding groove. The first extrusion wheel is mounted on one end of the connecting shaft passing through the second sliding groove.

[0018] In a possible embodiment, the extrusion device further includes a power assembly, which is transmission-connected to the first extrusion wheel. The second extrusion wheel is engaged with the first extrusion wheel and forms an extrusion channel with the first extrusion wheel.

[0019] In a second aspect, an embodiment of the present application further provides a 3D printing device, comprising a main body and the above-mentioned extrusion device, wherein the extrusion device is installed on the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic perspective view of an extrusion device according to one or more embodiments of the present application.

[0021] FIG2 is an exploded schematic diagram of the extrusion device of the present application in one or more embodiments.

[0022] FIG3 is a schematic diagram of the installation of the movable member and the first seat body of the extrusion device in one or more embodiments of the present application.

[0023] FIG4 is an exploded schematic diagram of a mounting base and movable parts of the extrusion device in one or more embodiments of the present application.

[0024] FIG5 is a schematic top view of the extrusion device of the present application in one or more embodiments, in which the top cover is hidden.

[0025] FIG6 is a schematic diagram showing the connection between the movable member and the second base body of the extrusion device in one or more embodiments of the present application.

[0026] FIG7 is a schematic diagram of a partial structure of the extrusion device of the present application in one or more embodiments.

[0027] FIG8 is a schematic structural diagram of a top cover of the extrusion device of the present application in one or more embodiments.

[0028] FIG9 is a schematic structural diagram of a 3D printing device according to one or more embodiments of the present application.

[0029] The meaning of the numbers in the accompanying drawings:

[0030] Extrusion device 100

[0031] Mounting Block 10

[0032] First seat body 11

[0033] Projection 110

[0034] Active slot 111

[0035] Blocking bump 1111

[0036] Boss 1112

[0037] Perforation 112

[0038] Active cavity 113

[0039] The third limiting hole 114

[0040] Second seat body 12

[0041] Rotating shaft 121

[0042] Sliding column 122

[0043] Connecting shaft 123

[0044] Fixed shaft 124

[0045] Active parts 20

[0046] First District 201

[0047] Second District 202

[0048] Install shaft 21

[0049] Rotating hole 22

[0050] First limiting hole 23

[0051] Second limiting hole 24

[0052] First chute 25

[0053] Second chute 26

[0054] Extrusion assembly 30

[0055] First extrusion wheel 31

[0056] First gear portion 311

[0057] First extrusion portion 312

[0058] Second extrusion wheel 32

[0059] The second gear portion 321

[0060] Second extrusion portion 322

[0061] Extrusion channel 33

[0062] Elastic member 40

[0063] Power assembly 50

[0064] Motor 51

[0065] First gear 52

[0066] Second gear 53

[0067] The third gear 54

[0068] Top cover 60

[0069] Mounting cavity 61

[0070] Feed port 62

[0071] Material guide 70

[0072] Limiter 80

[0073] Unlock Wall P1

[0074] Locking wall P2

[0075] First groove wall P3

[0076] Second groove wall P4

[0077] Third groove wall P5

[0078] Fourth groove wall P6

[0079] The first angle R1

[0080] The second angle R2

[0081] The third angle R3

[0082] Fourth angle R4

[0083] Fifth angle R5

[0084] 3D printing equipment 200

[0085] Main body 90

[0086] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0087] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Like reference numerals represent identical or similar components.

[0088] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "includes" and / or "comprising" and / or "having" integers, steps, operations, components and / or components do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0089] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be interpreted as idealized or overly formal meanings.

[0090] The specific implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0091] As shown in FIG. 1 to FIG. 5 , this embodiment provides an extrusion device 100 , including a mounting base 10 , a movable member 20 , an extrusion assembly 30 , and an elastic member 40 .

[0092] The movable part 20 is rotatably mounted on the mounting seat 10 to adjust the position of the movable part 20 on the mounting seat 10. The extrusion assembly 30 is used to extrude and convey consumables, and includes a first extrusion wheel 31 and a second extrusion wheel 32. A portion of the first extrusion wheel 31 is meshedly connected with a portion of the second extrusion wheel 32, and an extrusion channel 33 for the consumables to pass through is formed between another portion of the first extrusion wheel 31 and another portion of the second extrusion wheel 32. The first extrusion wheel 31 is rotatably mounted on the mounting seat 10, and the second extrusion wheel 32 is rotatably mounted on the movable part 20. When the movable part 20 rotates, the second extrusion wheel 32 approaches or moves away from the first extrusion wheel 31 as the movable part 20 rotates. When consumables need to be conveyed, the movable part 20 drives the second extrusion wheel 32 to approach the first extrusion wheel 31, so that the second extrusion wheel 32 is pressed against the first extrusion wheel 31 to ensure the tightness of the two when they are meshed. When loading or changing materials is required, the movable member 20 drives the second extrusion wheel 32 away from the first extrusion wheel 31, thereby disengaging the second extrusion wheel 32 from the first extrusion wheel 31 and increasing the distance between them, thereby performing loading or changing materials.

[0093] One end of the elastic member 40 abuts against the mounting seat 10, and the other end abuts against the movable member 20 to apply an elastic force to the movable member 20. The elastic force is used to enable the movable member 20 to drive the second extrusion wheel 32 to press against the first extrusion wheel 31, thereby preventing the movable member 20 from retreating and ensuring that the distance between the second extrusion wheel 32 and the first extrusion wheel 31 does not change, thereby improving the stability of the extrusion device 100 during operation.

[0094] It is worth noting that the elastic force exerted by the elastic member 40 should be greater than the resultant force exerted by the first extrusion wheel 31 and the consumables on the second extrusion wheel 32. This resultant force is the force that causes the second extrusion wheel 32 to move in a direction away from the first extrusion wheel 31. After being acted upon by this resultant force, the second extrusion wheel 32 will be exerted on the movable member 20, thereby causing the movable member 20 to rotate in a direction away from the first extrusion wheel 31.

[0095] In this way, the extrusion device 100 of the present application, by arranging an elastic member 40 between the mounting seat 10 and the movable member 20, applies elastic force to the movable member 20 by the elastic member 40, so that the movable member 20 drives the second extrusion wheel 32 to press against the first extrusion wheel 31, thereby preventing the first extrusion wheel 31 and the second extrusion wheel 32 from applying force to the movable member 20 during operation and causing the movable member 20 to retreat, ensuring that the distance between the second extrusion wheel 32 and the first extrusion wheel 31 does not change during operation, thereby improving the stability of the extrusion device 100 during operation.

[0096] Referring again to Figures 2 to 5 , in one embodiment, the mounting base 10 includes a first base 11 and a second base 12. The first base 11 is connected to the top of the second base 12. The first and second bases 11 and 12 may be detachably connected or integrally formed. The movable member 20 is interposed between the first and second bases 11 and 12 and is rotatably connected thereto to adjust the position of the movable member 20 relative to the first and second bases 11 and 12.

[0097] A protrusion 110 is provided on the end of the first base 11 near the second base 12. This protrusion 110 abuts against the end surface of the second base 12 near the first base 11, connecting the first and second bases 11 and 12. The protrusion 110 is generally C-shaped and defines a movable cavity 113 between the first and second bases 11 and 12. The movable member 20 is housed within this cavity and can rotate within it.

[0098] Referring again to Figures 2 to 5 , in one embodiment, the shape of the movable member 20 matches the shape of the movable cavity 113 and is generally C-shaped. The movable member 20 includes a first portion 201 and a second portion 202. Both the first portion 201 and the second portion 202 are arc-shaped, with one end of the second portion 202 connected to one end of the first portion 201. The end of the first portion 201, distal from the second portion 202, extends beyond the movable cavity 113, allowing for gripping to actuate the movable member 20.

[0099] Specifically, the movable cavity 113 includes an unlocking wall P1 and a locking wall P2 connected to each other. The locking wall P2 corresponds to the second section 202, and the unlocking wall P1 corresponds to the first section 201. The unlocking wall P1 and the locking wall P2 are arranged at a first angle R1, and the first section 201 and the second section 202 are arranged at a second angle R2. The first angle R1 is greater than the second angle R2.

[0100] When the second section 202 abuts against the locking wall P2 , the first extrusion wheel 31 and the second extrusion wheel 32 engage with each other, and the extrusion device 100 performs an extrusion operation.

[0101] When the first section 201 abuts against the unlocking wall P1 , the second extrusion wheel 32 moves away from the first extrusion wheel 31 , and the extrusion device 100 performs a material loading or material changing operation.

[0102] A rotation shaft 121 is protruding from a side of the second base 12 near the movable member 20. The movable member 20 defines a rotation hole 22, which is located approximately at one end of the first portion 201 near the second portion 202 and extends through the movable member 20. The rotation shaft 121 is partially rotatably received within the rotation hole 22, allowing the movable member 20 to rotate about the axis of the rotation shaft 121. The first base 11 defines a through hole 112, which corresponds to the position of the rotation hole 22. One end of the rotation shaft 121, which passes through the rotation hole 22, is received within the through hole 112.

[0103] In particular, the extension length of the first section 201 is greater than the extension length of the second section 202, so that the force arm corresponding to the first section 201 relative to the rotating shaft 121 is longer than the force arm corresponding to the second section 202 relative to the rotating shaft 121, so that the torque applied to the movable member 20 close to the first extrusion wheel 31 is greater than the torque applied to the movable member 20 away from the first extrusion wheel 31, so that even if the movable member 20 is not acted upon by the elastic member 40, the movable member 20 can still have a tendency to deflect toward the first extrusion wheel 31, ensuring that when the first extrusion wheel 31 and the second extrusion wheel 32 are in operation, even if the second extrusion wheel 32 is moved away by the reaction force of the first extrusion wheel 31, the torque borne by the movable member 20 that causes it to approach the first extrusion wheel 31 can partially offset the reaction force, thereby ensuring that the distance between the second extrusion wheel 32 and the first extrusion wheel 31 is not too large. In this way, only a small-sized elastic member 40 is added, and the elastic force provided by the elastic member 40 is sufficient to offset the reaction force borne by the second extrusion wheel 32 , thereby ensuring that the second extrusion wheel 32 is always pressed tightly against the first extrusion wheel 31 .

[0104] 2 to 6 , in one embodiment, the elastic member 40 , which is located away from the movable member 20 , abuts against the first base 11 . The elastic member 40 is a compression spring, etc., which is elastically compressed between the first base 11 and the movable member 20 .

[0105] Specifically, the first base 11 defines a movable groove 111 , and an extending direction of the movable groove 111 is parallel to or at a third angle R3 to an arrangement direction of the first extrusion wheel 31 and the second extrusion wheel 32 . The third angle R3 is an obtuse angle.

[0106] A mounting shaft 21 is protruding from the side of the first portion 201 near the first base 11. This shaft 21 is located on the side of the rotation hole 22 away from the second portion 202. The shaft 21 is partially slidably received within the movable groove 111, allowing the shaft 21 to slide within the groove 111 as the movable member 20 rotates. Along the axial direction, the shaft 21 is longer than the depth of the groove 111. The end of the shaft 21 away from the movable member 20 extends beyond the first base 11 and mounts the second extrusion wheel 32, positioned on the side of the first base 11 away from the second base 12.

[0107] It is worth noting that the width of the movable groove 111 is larger than the diameter of the mounting shaft 21 to provide a clearance space for the mounting shaft 21 when it moves, thereby preventing the mounting shaft 21 from getting stuck in the movable groove 111 when the movable member 20 rotates.

[0108] Furthermore, a stopper 1111 protrudes from the wall of the movable groove 111. This stopper 1111 is located approximately in the middle of the movable groove 111 and is used to abut against the installation shaft 21 and limit its movement. The installation shaft 21 is positioned between the groove wall on the side of the movable groove 111 near the first extrusion wheel 31 and the stopper 1111, so that the stopper 1111 limits the maximum distance the installation shaft 21 can move away from the first extrusion wheel 31.

[0109] Referring again to Figures 2 to 6 , in one embodiment, the elastic member 40 is received within the movable groove 111 along the extension direction of the movable groove 111, and the extension direction of the elastic member 40 is parallel to the extension direction of the movable groove 111. The elastic member 40 is located on the side of the mounting shaft 21 away from the first extrusion wheel 31. One end of the elastic member 40 abuts the circumference of the mounting shaft 21, and the other end abuts the groove wall of the movable groove 111 away from the first extrusion wheel 31.

[0110] In particular, a boss 1112 is protruded from the wall of the movable groove 111 away from the first extrusion wheel 31 , and one end of the elastic member 40 away from the installation shaft 21 is sleeved on the outer periphery of the boss 1112 to ensure the stability of the installation of the elastic member 40 .

[0111] In this way, when loading or changing materials is required, the movable member 20 is pulled and moves in a direction away from the first extrusion wheel 31. The movable member 20 then drives the installation shaft 21 to slide along the extension direction of the movable groove 111 in a direction away from the first extrusion wheel 31, and the installation shaft 21 continues to squeeze the elastic member 40. When extrusion is required, the movable member 20 is pulled and moves in a direction close to the first extrusion wheel 31. When the movable member 20 is released, the elastic member 40 returns to its original position and applies an elastic force to the installation shaft 21, causing the installation shaft 21 to press against the groove wall of the movable groove 111 on the side close to the first extrusion wheel 31.

[0112] Referring again to Figures 2 to 6 , in one embodiment, a first limiting hole 23 and a second limiting hole 24 are spaced apart at one end of the movable member 20. The first limiting hole 23 is located on the side of the second limiting hole 24 closer to the first extrusion wheel 31. The first limiting hole 23 and the second limiting hole 24 are generally located at the end of the first section 201 away from the second section 202 and are located on the rotation trajectory of the first section 201.

[0113] The extrusion device 100 further includes a limiting member 80 , which is used to limit the rotation of the movable member 20 when the first section 201 rotates to the first limiting hole 23 or the second limiting hole 24 .

[0114] Specifically, the first base 11 defines a third limiting hole 114 that extends through the first base 11. The third limiting hole 114 allows the limiting member 80 to pass through. One end of the limiting member 80, which passes through the third limiting hole 114, is retained within the first limiting hole 23 or the second limiting hole 24. The limiting member 80 may be a limiting element such as a ball-shaped positioning pin.

[0115] After the movable member 20 rotates until the second limiting hole 24 is aligned with the third limiting hole 114, the limiting member 80 is sequentially inserted into the second limiting hole 24 and the third limiting hole 114, so that the limiting member 80 fixes the movable member 20 relative to the first base body 11. At this time, the first extrusion wheel 31 and the second extrusion wheel 32 are engaged to facilitate the extrusion operation, and the extrusion device 100 is in a locked state.

[0116] After the movable member 20 rotates until the first limiting hole 23 is aligned with the third limiting hole 114, the limiting member 80 is sequentially inserted into the first limiting hole 23 and the third limiting hole 114, so that the limiting member 80 fixes the movable member 20 relative to the first base body 11. At this time, the second extrusion wheel 32 is away from the first extrusion wheel 31, facilitating material changing or loading operations, and the extrusion device 100 is in an unlocked state.

[0117] 2 to 6 , in one embodiment, the movable member 20 defines a first slot 25 . The first slot 25 is located approximately in the middle of the first section 201 and between the mounting shaft 21 and the first and second limiting holes 23 and 24 .

[0118] In particular, the extending direction of the first sliding groove 25 and the extending direction of the movable groove 111 form a fourth angle R4, and the fourth angle R4 is an acute angle.

[0119] A sliding post 122 is protruding from the side of the second base 12 near the movable member 20. The sliding post 122 is partially slidably received within a first chute 25, allowing the sliding post 122 to slide within the first chute 25. The first chute 25 is slightly curved, and its width is slightly larger than the outer diameter of the sliding post 122, creating a clearance to prevent the sliding post 122 from becoming stuck in the first chute 25 when the movable member 20 rotates. The end of the sliding post 122, away from the second base 12, passes through the first chute 25 and is received within the first base 11.

[0120] The first chute 25 has a first chute wall P3 on the side closest to the first extrusion wheel 31, and a second chute wall P4 on the side farther from the first extrusion wheel 31. The distance between the first chute wall P3 and the second chute wall P4 is greater than the outer diameter of the sliding post 122, thereby providing sufficient space for the sliding post 122 to slide.

[0121] When the extrusion device 100 is in a locked state, the sliding post 122 abuts against the second slot wall P4. When the extrusion device 100 is in an unlocked state, the sliding post 122 abuts against the first slot wall P3.

[0122] 2 to 6 , in one embodiment, the movable member 20 defines a second sliding groove 26 , and the second sliding groove 26 and the first sliding groove 25 are disposed on opposite sides of the rotating shaft 121 .

[0123] The second sliding groove 26 is located at one end of the second section 202 away from the first section 201. The extension direction of the second sliding groove 26 and the extension direction of the movable groove 111 form a fifth angle R5, which is an obtuse angle.

[0124] A connecting shaft 123 is protruding from the side of the second base 12 near the movable member 20. The connecting shaft 123 is partially slidably received within a second chute 26, allowing the connecting shaft 123 to move within the second chute 26. The second chute 26 is slightly curved, and its width is slightly larger than the outer diameter of the connecting shaft 123, creating a clearance to prevent the connecting shaft 123 from becoming stuck in the second chute 26 when the movable member 20 rotates. The end of the connecting shaft 123, facing away from the second base 12, passes through the second chute 26 and the first base 11, and is mounted on the first extrusion wheel 31. The first extrusion wheel 31 is located on the side of the first base 11 facing away from the second base 12 and is rotatable about the axis of the connecting shaft 123.

[0125] The second chute 26 has a third chute wall P5 on the side closest to the first extrusion wheel 31, and a fourth chute wall P6 on the side farther from the first extrusion wheel 31. The distance between the third chute wall P5 and the fourth chute wall P6 is greater than the outer diameter of the sliding post 122, creating sufficient space for the connecting shaft 123 to slide.

[0126] When the extrusion device 100 is in a locked state, the sliding post 122 abuts against the third slot wall P5. When the extrusion device 100 is in an unlocked state, the sliding post 122 abuts against the fourth slot wall P6.

[0127] Please refer to Figure 7 and Figure 4 and Figure 6 again. In one embodiment, the extrusion device 100 also includes a power component 50, which is transmission-connected to the first extrusion wheel 31. The second extrusion wheel 32 is engaged with the first extrusion wheel 31 and forms an extrusion channel 33 between the second extrusion wheel 32 and the first extrusion wheel 31.

[0128] Specifically, the power assembly 50 includes a motor 51, a first gear 52, a second gear 53, and a third gear 54. The motor 51 is mounted on the side of the second base 12 away from the first base 11, and the shaft end of the motor 51 passes through the second base 12, the movable member 20, and the first base 11 in sequence.

[0129] The first base 11 defines a clearance groove, and the first gear 52 is mounted on the shaft end of the motor 51 and located within the clearance groove. The second gear 53 is located to one side of the first gear 52 and meshes with the first gear 52. The third gear 54 is coaxially arranged with the second gear 53 and connected to the second gear 53 via a transmission shaft, so that the third gear 54 rotates synchronously with the second gear 53. The second base 12 has a fixed shaft 124 protruding from the end closest to the first base 11, and the second gear 53 is rotatably mounted on the fixed shaft 124.

[0130] In particular, the number of teeth of the first gear 52 is smaller than that of the second gear 53 , and the number of teeth of the second gear 53 is larger than that of the third gear 54 , so as to facilitate speed regulation.

[0131] The first extrusion wheel 31 includes a coaxially connected first gear portion 311 and a first extrusion portion 312. The first gear portion 311 is located at the end of the first extrusion portion 312 closest to the first base 11. The second extrusion wheel 32 includes a coaxially connected second gear portion 321 and a second extrusion portion 322. The first gear portion 311 is located on one side of the third gear 54 and meshes with the third gear 54. The third gear 54 drives the first gear portion 311 to rotate, which in turn drives the first extrusion portion 312 to rotate synchronously.

[0132] The second gear portion 321 is meshed with the first gear portion 311 . When the first gear portion 311 rotates, the first gear portion 311 drives the second gear portion 321 to rotate, and the second gear portion 321 further drives the second extrusion portion 322 to rotate synchronously.

[0133] Specifically, the first extrusion portion 312 and the second extrusion portion 322 are spaced apart to form the extrusion channel 33 therebetween. The first extrusion portion 312 and the second extrusion portion 322 rotate at the same speed but in opposite directions, thereby acting on the consumable material from both sides and extruding the consumable material from the extrusion channel 33.

[0134] Referring again to FIG. 8 and FIG. 2 , in one embodiment, the extrusion device 100 further includes a top cover 60 and a material guide 70 . The top cover 60 is disposed on an end of the first base 11 away from the second base 12 and has a mounting cavity 61 . The mounting cavity 61 accommodates the first extrusion wheel 31 and the second extrusion wheel 32 to protect them.

[0135] The top cover 60 defines a material guide opening 62, which receives a material guide member 70. One end of the material guide member 70 passes through the material guide opening 62 and is positioned outside the top cover 60. The other end of the material guide member 70 extends into the mounting cavity 61, facing the extrusion channel 33. The material guide member 70 allows consumables to pass through, conveying them from outside the top cover 60 through the material guide member 70 to the extrusion channel 33, improving the straightness of the consumables during conveying.

[0136] As shown in FIG9 , an embodiment of the present application further provides a 3D printing device 200, comprising a main body 90 and the extruder 100 described above. The extruder 100 is mounted on the main body 90. The main body 90 is a collection of various structures capable of 3D printing. The main body 90 can be configured to include a drive assembly, a molding platform, or a nozzle.

[0137] In this way, since the 3D printing device 200 has the above-mentioned extrusion device 100, the elastic member 40 provided in the extrusion device 100 can apply elastic force to the movable member 20, so that the movable member 20 drives the second extrusion wheel 32 to press against the first extrusion wheel 31, thereby preventing the first extrusion wheel 31 and the second extrusion wheel 32 from applying force to the movable member 20 during operation and causing the movable member 20 to retreat, ensuring that the distance between the first extrusion wheel 31 and the second extrusion wheel 32 will not change during operation, thereby improving the stability of the consumable material extrusion when the 3D printing device 200 is working and reducing the risk of material breakage in the 3D printing device 200.

[0138] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are within the scope of the present application.

Claims

1. An extrusion device, characterized in that, Comprising: A mounting base; A movable member rotatably mounted on the mounting base; An extrusion assembly for extruding and conveying consumables, and including a first extrusion wheel and a second extrusion wheel. The first extrusion wheel is mounted on the mounting base, and the second extrusion wheel is mounted on the movable member and is adapted to approach or move away from the first extrusion wheel as the movable member rotates; An elastic member having one end abutted against the mounting base and the other end abutted against the movable member to apply an elastic force to the movable member. The elastic force is used to cause the movable member to drive the second extrusion wheel to abut tightly against the first extrusion wheel.

2. The extrusion device according to claim 1, characterized in that, The mounting base includes a first base body and a second base body. The movable member is clamped between the first base body and the second base body and is rotatably connected to the first base body and the second base body. The elastic member is clamped between the movable member and the first base body.

3. The extrusion device according to claim 2, characterized in that, The first base body is provided with a movable groove. A mounting shaft protrudes from a side of the movable member close to the first base body, and a part of the mounting shaft is slidably received in the movable groove; Axially along the mounting shaft, the length of the mounting shaft is greater than the depth of the movable groove. One end of the mounting shaft remote from the movable member extends beyond the first base body and mounts the second extrusion wheel.

4. The extrusion device according to claim 3, characterized in that, Axially along the extension direction of the movable groove, the elastic member is received in the movable groove and is located on a side of the mounting shaft remote from the first extrusion wheel. One end of the elastic member abuts against the circumferential surface of the mounting shaft, and the other end thereof abuts against the groove wall of the movable groove.

5. The extrusion device according to claim 3, characterized in that, One end of the movable member is provided with a first limiting hole and a second limiting hole arranged at intervals. The first base body is provided with a third limiting hole for a limiting member to pass through. One end of the limiting member passing through the third limiting hole is clamped in the first limiting hole or the second limiting hole.

6. The extrusion device according to claim 5, characterized in that, A rotating shaft protrudes from a side of the second base body close to the movable member. The movable member is provided with a rotating hole, and a part of the rotating shaft is rotatably received in the rotating hole. The rotating hole, the first limiting hole and the second limiting hole are respectively arranged on opposite sides of the mounting shaft.

7. The extrusion device according to claim 6, characterized in that, The movable member is provided with a first sliding groove located between the mounting shaft and the first limiting hole and the second limiting hole; A sliding column protrudes from a side of the second base body close to the movable member, and a part of the sliding column is slidably received in the first sliding groove.

8. The extrusion device according to claim 7, wherein, The movable member is provided with a second sliding groove, and the second sliding groove and the first sliding groove are respectively arranged on opposite sides of the rotating shaft; A connecting shaft protrudes from a side of the second base body close to the movable member, and a part of the connecting shaft is slidably received in the second sliding groove. One end of the connecting shaft protruding out of the second sliding groove mounts the first extrusion wheel.

9. The extrusion device according to any one of claims 1 to 8, characterized in that, The extrusion device further includes a power assembly. The power assembly is in transmission connection with the first extrusion wheel. The second extrusion wheel meshes with the first extrusion wheel and forms a material extrusion channel therebetween.

10. A 3D printing device, characterized in that, Comprising a main body part and the extrusion device according to any one of claims 1 to 9, and the extrusion device is mounted on the main body part.

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