Extrusion device, printing head device and 3D printing equipment

Abstract

The utility model relates to the field of 3D printing and provides an extrusion device, a printing head device and 3D printing equipment in order to solve the problem that an existing 3D printing equipment structure for achieving multi-consumable switching is complex. The extrusion device comprises a first driving part, a switching assembly and a plurality of extrusion assemblies, each extrusion assembly comprises a driving extrusion wheel and a driven extrusion wheel, and each driven extrusion wheel is provided with a first position or a second position; at the first position, the driven extrusion wheel is arranged close to the corresponding driving extrusion wheel to form an extrusion gap; the first driving part is in transmission connection with each driving extrusion wheel; the switching assembly comprises a second driving piece and a switching piece, and the second driving piece is in transmission connection with the switching piece. And the second driving piece is configured to drive the switching piece to move relative to the extrusion assemblies so as to selectively control the driven extrusion wheel of at least one extrusion assembly to move to the first position. The multi-consumable switching device has the beneficial effects that the structure is compact and reasonable, and switching of multiple consumables can be conveniently achieved.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and more specifically, to an extrusion device, a print head device and a 3D printing device. Background Art

[0002] Existing 3D printing equipment can only realize single-consumable printing or can realize multi-consumable switching, but the structure is relatively complex. Utility Model Content

[0003] The present application provides an extrusion device, a print head device and a 3D printing device to solve the problem that the existing 3D printing device has a relatively complex structure for switching multiple consumables.

[0004] In a first aspect, the present application provides an extrusion device, comprising a first drive member, a switching component and a plurality of extrusion components. Each extrusion component comprises an active extrusion wheel and a driven extrusion wheel, and each driven extrusion wheel is flexibly arranged at a first position or a second position relative to the corresponding active extrusion wheel; in the first position, the driven extrusion wheel is arranged close to the corresponding active extrusion wheel to form an extrusion gap; in the second position, the driven extrusion wheel is arranged away from the corresponding active extrusion wheel. The first drive member is transmission-connected to each active extrusion wheel to drive the active extrusion wheel to rotate. The switching component comprises a second drive member and a switching member, and the second drive member is transmission-connected to the switching member. The second drive member is configured to drive the switching member to move relative to the extrusion component to selectively control the driven extrusion wheel of at least one extrusion component to move to the first position.

[0005] In the extrusion device of the present application, multiple extrusion components can be used to extrude multiple consumables. When a certain extrusion component is needed to extrude consumables, the second driving member drives the switching member to move to the position corresponding to the extrusion component, and presses the extrusion driven wheel of the extrusion component toward the side close to the active extrusion wheel, so that the driven extrusion wheel and the active extrusion wheel jointly press the consumables passing through the extrusion channel. In this way, when the first driving member drives the active extrusion wheel to rotate, the active extrusion wheel can realize the extrusion of consumables together with the driven extrusion wheel.

[0006] Therefore, the extrusion device of the present application has a compact and reasonable structure and can conveniently realize the switching of multiple consumables.

[0007] In one possible implementation:

[0008] The extrusion assembly also includes a bracket, the bracket is provided with a plurality of extrusion channels, each extrusion channel penetrates the bracket along a first direction and is configured to communicate with a corresponding extrusion gap. The active extrusion wheel is rotatably mounted on the bracket, and the driven extrusion wheel is spaced apart from the active extrusion wheel along a second direction, wherein the second direction is perpendicular to the first direction.

[0009] In one possible implementation:

[0010] The extrusion assembly also includes a movable frame and an elastic member, the driven extrusion wheel is rotatably mounted on the movable frame, the elastic member is arranged between the movable frame and the bracket, and the elastic member is configured to provide elastic force between the movable frame and the bracket when deformed to maintain the driven extrusion wheel in the second position.

[0011] In one possible implementation:

[0012] The second driving member drives the switching member to move in a third direction relative to the extrusion assembly, and the switching member moves the driven extrusion wheel by abutting against the movable frame. The third direction is perpendicular to the first direction and the second direction. In the second direction, at least two rows of the extrusion assemblies are included, and each row independently includes at least one extrusion assembly.

[0013] In one possible implementation:

[0014] The extrusion device further includes a first end plate and a second end plate, wherein the first end plate and the second end plate are spaced apart from each other along a third direction;

[0015] The two rows of extrusion assemblies are spaced from each other along the second direction to define a movable space; each row of the extrusion assemblies comprises a plurality of extrusion assemblies sequentially overlapped between the first end plate and the second end plate along the third direction;

[0016] The second driving member includes a driving motor and a transmission rod, the transmission rod extends along the third direction, is connected between the first end plate and the second end plate and is located in the activity space; the driving motor is installed on the side of the second end plate away from the first end plate and is transmission-connected to the transmission rod;

[0017] The switching member is movably arranged in the activity space along three directions, and the switching member is transmission-connected to the transmission rod so as to move along the third direction under the drive of the transmission rod; the switching member includes two pushing parts, which are respectively located on both sides of the switching member along the second direction;

[0018] The movable frame has an abutting top end, and the abutting top ends of the plurality of movable frames are respectively located on one side close to the activity space, and the abutting top ends of the plurality of movable frames are staggered in sequence along the third direction.

[0019] In one possible implementation:

[0020] The abutting top ends of the movable frames of the multiple extrusion assemblies in each row of the extrusion assemblies are respectively distributed at equal intervals along the third direction at a spacing d, and the two rows of the extrusion assemblies are staggered by d / 2 along the third direction, and when the pushing portion on one side abuts against the abutting top end of the movable frame on the corresponding side, the pushing portion on the other side is located in the gap between the two adjacent movable frames on the corresponding side.

[0021] In one possible implementation:

[0022] The pushing portion and the abutting end have relatively convex arc surfaces.

[0023] In one possible implementation:

[0024] The switching member is connected to sensors on both sides along the second direction. The extrusion assembly also includes a sensed member, which is movably connected to the bracket along the second direction, and when consumables pass through the extrusion channel, the consumables extrude the sensed member along the second direction to a position close to the sensor.

[0025] In one possible implementation:

[0026] The extrusion assembly is provided with a concave positioning groove on one side along the third direction and a convex positioning protrusion on the other side. Two adjacent extrusion assemblies along the third direction are positioned and matched through the positioning groove and the positioning protrusion.

[0027] In one possible implementation:

[0028] The active extrusion wheels of each row of the extrusion assembly are rotatably mounted between the first end plate and the second end plate via a rotating shaft. The switching assembly also includes a gear set, which includes a driving gear and two driven gears. The first driving member is connected to the driving gear in a transmission manner, and the driving gears are respectively engaged with the two driven gears. The two driven gears are respectively connected to the two rotating shafts to drive the two rotating shafts to rotate.

[0029] In a second aspect, the present application provides a print head device, comprising a nozzle assembly and the aforementioned extrusion device. The nozzle assembly is connected to the extrusion device, and is used to receive and output the consumables extruded by the extrusion device.

[0030] In a third aspect, the present application provides a 3D printing device, which includes a printing platform and the aforementioned extrusion device or print head device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of the structure of a 3D printing device according to an embodiment of the present application;

[0033] Figure 2 A three-dimensional view of an extrusion device according to an embodiment of the present application (the sliding rod is not shown);

[0034] Figure 3 for Figure 2 A top view of an extrusion device;

[0035] Figure 4 for Figure 2 A cross-sectional view of the extrusion device along line AA;

[0036] Figure 5 for Figure 3 A cross-sectional view of the extrusion device along line BB;

[0037] Figure 6 A three-dimensional view of an extrusion assembly according to an embodiment of the present application;

[0038] Figure 7 for Figure 6 A cross-sectional view of the extrusion component along line CC;

[0039] Figure 8 for Figure 6 An exploded view of the extrusion component;

[0040] Fig. 9 for Figure 6 Another perspective view of the extrusion component;

[0041] Fig.10 Schematic diagram of the structure of the switching element in the embodiment of the present application.

[0042] Description of main component symbols:

[0043] 3D printing equipment 100

[0044] Printing platform 110

[0045] Print head device 120

[0046] Nozzle assembly 121

[0047] Extrusion device 10

[0048] Switching Components 11

[0049] The first driving member 12

[0050] Extrusion component 13

[0051] Active extrusion wheel 14

[0052] Driven extruder wheel 15

[0053] Second driving member 16

[0054] Switching piece 17

[0055] Bracket 18

[0056] Activity rack 19

[0057] Elastic member 20, 20a

[0058] Inlet connection 21

[0059] Sensing part 22

[0060] Ball 23

[0061] First end plate 24

[0062] Second end plate 25

[0063] Positioning protrusion 26

[0064] Drive motor 27

[0065] Transmission rod 28

[0066] Sliding rod 29

[0067] Pushing unit 30

[0068] Reach top 31

[0069] Gear set 33

[0070] Driving gear 34

[0071] Driven gear 35

[0072] Intermediate gear 36

[0073] Sensor 37

[0074] Extrusion channel T1

[0075] First installation slot C1

[0076] Second installation slot C2

[0077] Positioning slot C3

[0078] Event Space Q1

[0079] Sliding hole K1

[0080] Matching hole K2

[0081] Through hole K3

[0082] First connecting hole K4

[0083] Second connecting hole K5

[0084] The third connecting hole K6

[0085] Gap f1

[0086] First direction Y1

[0087] Second direction Y2

[0088] The third direction Y3 DETAILED DESCRIPTION

[0089] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0090] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0091] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0092] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0093] Example

[0094] See also Figure 1 This embodiment provides a 3D printing device 100, which can be specifically a 3D printing device 100 based on FDM technology.

[0095] The 3D printing device 100 includes a printing platform 110, a print head device 120, and displacement components in three directions: X, Y, and Z. The print head device 120 and the printing platform 110 are controlled to move relative to each other under the drive of the displacement components. For example, the printing platform 110 can be displaced in the Y direction under the drive of the displacement component in the Y direction, and the print head device 120 can be displaced in the X direction and / or the Z direction under the drive of the displacement components in the X and Z directions, and the consumables are heated and melted according to the set path and printed on the printing platform 110.

[0096] The displacement components in the X, Y, and Z directions may be driven by a screw nut, a belt, or other drive mechanisms, which are not limited here.

[0097] In this embodiment, the print head device 120 includes an extrusion device 10 and a nozzle assembly 121. The nozzle assembly 121 is connected to the extrusion device 10, and is used to receive the consumables extruded by the extrusion device 10, and heat and melt the consumables to print on the printing platform 110.

[0098] The nozzle assembly 121 in this embodiment mainly includes a structure for heating and melting consumables, and has a nozzle that allows the molten consumables to be ejected, etc. Specifically, the structure of the existing nozzle assembly 121 can be adopted, which will not be described in detail here.

[0099] Figure 2-Figure 10 An extrusion device 10 provided in an embodiment of the present application is shown. The extrusion device 10 of this embodiment can realize multiple consumable extrusion, for example, can be used for extrusion of consumables of multiple different colors, which will be described in detail below.

[0100] See also Figure 2 and Figure 3 The extrusion device 10 in this embodiment includes a switching component 11, a first driving member 12 and a plurality of extrusion components 13. The first driving member 12 is used to provide extrusion power for each extrusion component 13. When the plurality of extrusion components 13 provide different consumables, the switching component 11 can realize the switching of the plurality of extrusion components 13, thereby realizing the extrusion of different consumables.

[0101] See also Figure 4 and Figure 5 In this embodiment, the extrusion assembly 13 includes an active extrusion wheel 14 and a driven extrusion wheel 15. The driven extrusion wheel 15 is movably arranged and has a first position or a second position. In the first position, the driven extrusion wheel 15 is close to the active extrusion wheel 14 to form an extrusion gap; in the second position, the driven extrusion wheel 15 is arranged away from the active extrusion wheel 14. The first driving member 12 is transmission-connected to each active extrusion wheel 14, and is used to drive the active extrusion wheel 14 to rotate.

[0102] The switching assembly 11 includes a second driving member 16 and a switching member 17. The second driving member 16 is transmission-connected to the switching member 17 to drive the switching member 17 to move relative to the extrusion assembly 13 to selectively control the driven extrusion wheel 15 of at least one extrusion assembly 13 to move to the first position.

[0103] In the extrusion device 10 of this embodiment, multiple extrusion components 13 can be used to extrude multiple consumables. When a certain extrusion component 13 is needed to extrude consumables, the second driving member 16 drives the switching member 17 to move to the position corresponding to the extrusion component 13, and presses the extrusion driven wheel of the extrusion component 13 toward the side close to the active extrusion wheel 14, so that the driven extrusion wheel 15 and the active extrusion wheel 14 jointly press the consumables passing through the extrusion channel T1. In this way, when the first driving member 12 drives the active extrusion wheel 14 to rotate, the active extrusion wheel 14 can realize the extrusion of consumables together with the driven extrusion wheel 15.

[0104] For example Figure 4 As shown in the figure, there are two rows of extrusion components 13, three in each row, and the switching member 17 corresponds to the extrusion component 13 at the bottom on the right. At this time, the extrusion component 13 can extrude consumables, while the other extrusion components 13 are in a state where the driven extrusion wheel 15 and the active extrusion wheel 14 are separated and cannot extrude consumables.

[0105] Therefore, the extrusion device 10 in this embodiment has a compact and reasonable structure and can conveniently realize the switching of multiple consumables.

[0106] See also Figure 6-Figure 9 In this embodiment, the extrusion assembly 13 further includes a bracket 18 , a movable frame 19 and an elastic member 20 .

[0107] The bracket 18 is provided with a plurality of extrusion channels T1, each of which passes through the bracket 18 along the first direction Y1 and is configured to communicate with the corresponding extrusion gap. An inlet connector 21 may be provided at one end of the extrusion channel T1. The active extrusion wheel 14 is rotatably mounted on the bracket 18, and the driven extrusion wheel 15 is spaced apart from the active extrusion wheel 14 along the second direction Y2, and the driven extrusion wheel 15 is movably connected to the bracket 18 along the second direction Y2, wherein the second direction Y2 is perpendicular to the first direction Y1. In this embodiment, the first direction Y1 is parallel to the Z direction, and the second direction Y2 is parallel to the Y direction.

[0108] The bracket 18 is provided with a through hole K3 extending along the third direction Y3, and the active extrusion wheel 14 is rotatably arranged in the through hole K3. In this embodiment, the third direction Y3 is parallel to the Z direction. In addition, the through hole K3 is connected to the extrusion channel T1 along the second direction Y2, so that one side of the outer peripheral surface of the active extrusion wheel 14 extends into the extrusion channel T1. Optionally, the outer peripheral surface of the active extrusion wheel 14 can be set as a rough surface, such as a sawtooth surface or a tooth surface.

[0109] The driven extrusion wheel 15 is rotatably mounted on the movable frame 19. An elastic member 20 is provided between the movable frame 19 and the bracket 18. The elastic member 20 is configured to provide elastic force between the movable frame 19 and the bracket 18 when deformed, so as to maintain the driven extrusion wheel 15 in the second position. In this way, when the movable frame 19 is not squeezed by the switching member 17, the elastic member 20 can keep the driven extrusion wheel 15 away from the active extrusion wheel 14. In this way, even if the active extrusion wheel 14 rotates, the consumables in the extrusion channel T1 will not be squeezed out. When the switching member 17 squeezes the movable frame 19, the movable frame 19 can be pushed toward the side close to the active extrusion wheel 14, so that the driven extrusion wheel 15 can press the consumables against the active extrusion wheel 14. In this way, the active extrusion wheel 14 can drive the consumables to move along the extrusion channel T1 through friction.

[0110] In this embodiment, the elastic member 20 can be a spring sheet, the bracket 18 is provided with a first mounting groove C1, the two ends of the elastic member 20 are respectively connected to the two side groove walls of the first mounting groove C1, and the movable frame 19 is connected to the middle position of the elastic member 20 and is partially accommodated in the first mounting groove C1. The first mounting groove C1 is connected to the extrusion channel T1 along the second direction Y2, and the driven extrusion wheel 15 is rotatably mounted on the side of the movable frame 19 close to the extrusion channel T1, and can extend into the extrusion channel T1 to extrude the consumables together with the active extrusion wheel 14.

[0111] In other embodiments, the elastic member may also be a spring, an elastic pad or other structure capable of providing elastic force, which is not limited here.

[0112] In this embodiment, the extrusion assembly 13 further includes a sensing member 22 for sensing a sensor 37 (see Figure 5 ) is sensed to determine whether there is consumable in the extrusion channel T1. The sensed member 22 is movably connected to the bracket 18 along the second direction Y2, and when consumable passes through the extrusion channel T1, the consumable will be extruded by the sensed member 22 along the second direction Y2 to a position close to the sensor 37. Optionally, the bracket 18 is provided with a second mounting groove C2, and another elastic member 20a (for example, a spring) is connected between the groove walls on both sides of the second mounting groove C2, and the sensed member 22 can be a block-shaped opaque member, and the sensed member 22 is connected to the elastic member 20a. The second mounting groove C2 is connected to the extrusion channel T1, and when no consumable passes through the extrusion channel T1, the sensed member 22 is located on the side closer to the extrusion channel T1, and when consumable passes through the extrusion channel T1, the consumable will be pushed outward by the sensed member 22, so that the sensed member 22 is in a position where it can be sensed.

[0113] Optionally, a ball 23 is provided at the connection point between the second mounting groove C2 and the extrusion channel T1. When there is no consumable in the extrusion channel T1, the ball 23 is elastically limited by the elastic member 20a and the sensed member 22 to a side close to the extrusion channel T1. When there is consumable in the extrusion channel T1, the consumable pushes the ball 23 outward, thereby overcoming the elastic force of the elastic member 20a and pushing the sensed member 22 outward.

[0114] See again Figure 3-Figure 5 In this embodiment, the extrusion device 10 further includes a first end plate 24 and a second end plate 25, and the first end plate 24 and the second end plate 25 are spaced apart from each other along the third direction Y3. There are two rows of extrusion assemblies 13, and the two rows of extrusion assemblies 13 are spaced apart from each other along the second direction Y2 to define an activity space Q1; each row of extrusion assemblies 13 includes a plurality of extrusion assemblies 13 sequentially overlapped between the first end plate 24 and the second end plate 25 along the third direction Y3.

[0115] For example Figure 3 or Figure 4 As shown in FIG. 1 , the two rows of extrusion assemblies 13 respectively include three extrusion assemblies 13. In other embodiments, the number of each row of extrusion assemblies 13 can also be set as required. In this embodiment, the shape of the bracket 18 of the extrusion assembly 13 is roughly a rectangular parallelepiped, and its size along the third direction Y3 is relatively small (as the thickness direction size of the bracket 18). In this way, after the multiple extrusion assemblies 13 are superimposed along the third direction Y3, the total size along the third direction Y3 is also relatively small.

[0116] Optionally, a positioning groove C3 is concavely provided on one side of the extrusion assembly 13 along the third direction Y3, and a positioning protrusion 26 is convexly provided on the other side, and two adjacent extrusion assemblies 13 along the third direction Y3 are positioned and matched by the positioning groove C3 and the positioning protrusion 26. In this embodiment, each extrusion assembly 13 has two positioning grooves C3 and two positioning protrusions 26, respectively, and the two positioning grooves C3 and the two positioning protrusions 26 are arranged at intervals along the diagonal line of the rectangle. In this way, when multiple extrusion assemblies 13 are superimposed along the third direction Y3, each extrusion assembly 13 can cooperate with each other through the positioning of the positioning grooves C3 and the positioning protrusions 26.

[0117] See again Figure 4 and Figure 5In this embodiment, the second driving member 16 includes a driving motor 27 and a transmission rod 28, and the transmission rod 28 extends along the third direction Y3. In this embodiment, the transmission rod 28 is a screw rod, which is rotatably connected between the first end plate 24 and the second end plate 25 and is located in the activity space Q1; the driving motor 27 is installed on the side of the second end plate 25 away from the first end plate 24 and is transmission-connected to the screw rod. The switching member 17 is movably arranged in the activity space Q1 along three directions, and the switching member 17 is transmission-connected to the screw rod so as to move along the third direction Y3 driven by the screw rod. In this way, when the driving motor 27 drives the screw rod to rotate, the screw rod can drive the switching member 17 to move along the third direction Y3. When the switching member 17 moves to different positions, different extrusion components 13 can be selected to output consumables.

[0118] In this embodiment, the two ends of the screw rod can be rotatably mounted on the first end plate 24 and the second end plate 25 respectively through bearings, and a screw rod nut pair can be formed between the screw rod and the switching member 17. Optionally, the switching member 17 is in a long strip shape extending along the first direction Y1, and a matching hole K2 for allowing the screw rod to pass through is set in the middle position along the first direction Y1, and sliding holes K1 are set at both ends.

[0119] In other embodiments, the transmission rod and the switching member can be changed to a guide rail and a slider transmission, in which case the transmission rod is a guide rail and the switching member is a slider.

[0120] In other embodiments, the transmission rod and the switching member can be changed to an optical axis belt drive, in which case the transmission rod is the optical axis, and the switching member is connected to the belt to move driven by the belt.

[0121] Two sliding rods 29 are also connected between the first end plate 24 and the second end plate 25. The two sliding holes K1 of the switching member 17 are respectively slidably mounted on the two sliding rods 29 to realize the slidable setting of the switching member 17 along the third direction Y3. The matching hole K2 can be set as a threaded hole that is screw-matched with the screw. The matching hole K2 can also be a through hole larger than the screw. In this case, the screw is screw-matched with a nut, and the nut is connected to the switching member 17, so that the screw drives the nut and the switching member 17 to move along the third direction Y3.

[0122] In other embodiments, the movement of the switching member 17 along the third direction Y3 may also be directly achieved by a linear motor or other power member capable of linear drive, which is not limited here.

[0123] Continue to see Figure 4 and Figure 5 In this embodiment, the switching member 17 includes two pushing portions 30, and the two pushing portions 30 are respectively located on both sides of the switching member 17 along the second direction Y2 (also shown in Fig.10The movable frame 19 has an abutting top portion 31, and the abutting top portions 31 of the plurality of movable frames 19 are respectively located near one side of the movable space Q1. Optionally, each abutting top portion 31 extends into the movable space Q1 to facilitate being pushed by the switching member 17.

[0124] The abutting ends 31 of the multiple movable frames 19 are staggered in sequence along the third direction Y3, while the two pushing portions 30 of the switching member 17 are collinear along the second direction Y2 and are not staggered in the third direction Y3. For example, as shown in the figure, the abutting ends 31 of the movable frames 19 in the same row are staggered at an equal interval d, and the two rows of extrusion assemblies 13 are staggered d / 2 along the third direction Y3. Optionally, each extrusion assembly 13 has the same shape and size, and d is equal to the thickness dimension of the extrusion assembly 13. When the pushing portion 30 on one side abuts against the abutting end 31 of the movable frame 19 on the corresponding side, the pushing portion 30 on the other side is located at the gap f1 between the two adjacent movable frames 19 on the corresponding side. In this way, the switching member 17 can trigger different extrusion assemblies 13 in sequence by moving with a step distance of d / 2, so that the driven extrusion wheel 15 and the active extrusion wheel 14 of the selected extrusion assembly 13 cooperate for extrusion. Optionally, the pushing portion 30 and the abutting top portions 31 have relatively convex arc surfaces, so that the pushing portion 30 can be smoothly pushed or released along the second direction Y2 by displacement along the third direction Y3 .

[0125] In this embodiment, the first end plate 24 protrudes from the left extrusion assembly 13 by a distance of 2 / d, and the second end plate 25 protrudes from the right extrusion assembly 13 by a distance of 2 / d, so that the extrusion assemblies 13 on both sides can be easily staggered.

[0126] In other embodiments, the approach effect may be achieved by not staggering the two rows of extrusion assemblies 13 and staggering the two pushing portions 30 of the switching member 17 by d / 2.

[0127] In the present embodiment, the number of the extrusion assemblies 13 of the extrusion device 10 can be easily increased or decreased as needed. For example, when more types of consumables need to be extruded, it is only necessary to add an extrusion assembly 13 between the first end plate 24 and the second end plate 25.

[0128] In other embodiments, the extrusion components 13 may be arranged in a single row, and in this case, the switching member 17 may include only one pushing portion 30 .

[0129] Continue to see Figure 4 In this embodiment, the active extrusion wheels 14 of each row extrusion assembly 13 are rotatably mounted between the first end plate 24 and the second end plate 25 via a rotating shaft (not shown in the figure). Both ends of the rotating shaft can be rotatably connected to the first connecting hole K4 of the first end plate 24 and the second connecting hole K5 of the second end plate 25 via bearings.

[0130] The switching assembly 11 further includes a gear set 33, which includes a driving gear 34 and two driven gears 35. The first driving member 12 is connected to the driving gear 34 in a transmission manner, and the driving gear 34 is respectively engaged with the two driven gears 35. The two driven gears 35 are respectively connected to the two rotating shafts in a transmission manner to drive the two rotating shafts to rotate. For example, the driven gear 35 is provided with a third connecting hole K6, and one end of the rotating shaft passes through the first connecting hole K4 and then penetrates and connects to the third connecting hole K6. The gear set 33 may also include one or more intermediate gears 36, which are used to transmit the power of the driving gear 34 to the driven gear 35.

[0131] With this arrangement, only one first driving member 12 is needed to drive the active extrusion wheels 14 of the plurality of extrusion assemblies 13 to rotate, thereby simplifying the structure and saving costs.

[0132] In other embodiments, each active extrusion wheel 14 may also be driven by other means, which are not limited here.

[0133] See also Figure 5 and Fig.10 In this embodiment, sensors 37 are connected to both sides of the switching member 17 along the second direction Y2, and the sensors 37 on both sides correspond to the sensed members 22 on the extrusion assemblies 13 on both sides.

[0134] When there is consumable in the extrusion channel T1 of a certain extrusion component 13, the sensed member 22 on the extrusion component 13 is pushed toward the side of the sensor 37. At this time, if the switching member 17 moves to the position corresponding to the extrusion component 13, the sensor 37 senses the sensor 37, thereby sending a signal to instruct the first driving member 12 to operate, thereby driving the active extrusion wheel 14 to rotate to cooperate with the driven extrusion wheel 15 to extrude the consumable.

[0135] When there is no consumable material in the extrusion channel T1 of the extrusion assembly 13 , even if the switching member 17 makes the driven extrusion wheel 15 of the extrusion assembly 13 close to the active extrusion wheel 14 , the active extrusion wheel 14 will not be driven to rotate.

[0136] Optionally, the sensor 37 may be a photoelectric sensor. When the sensing element is blocked between the transmitting end and the receiving end of the photoelectric sensor, the photoelectric sensor generates a signal to prompt the switching element 17 to move into position.

[0137] The extrusion device 10 in this embodiment is used for Figure 1 In addition to the gantry-type 3D printing device 100, it can also be used for single cantilever 3D printing equipment, complete machine 3D printing equipment, infinite Z-axis 3D printing equipment, delta 3D printing equipment, etc. In summary, the extrusion device 10 in the embodiment of the present application has a compact structure and can conveniently realize the extrusion and switching of multiple consumables.

[0138] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An extrusion device, characterized in that: include: A plurality of extrusion assemblies, each of the extrusion assemblies comprises an active extrusion wheel and a driven extrusion wheel, each of the driven extrusion wheels is movably arranged at a first position or a second position relative to the corresponding active extrusion wheel; when in the first position, the driven extrusion wheel is arranged close to the corresponding active extrusion wheel to form an extrusion gap; when in the second position, the driven extrusion wheel is arranged away from the corresponding active extrusion wheel; A first driving member, the first driving member is drivingly connected to each of the active extrusion wheels to drive the active extrusion wheels to rotate; A switching component, the switching component comprising a second driving member and a switching member, the second driving member being drivingly connected to the switching member; The second driving member is configured to drive the switching member to move relative to the extrusion assembly to selectively control at least one driven extrusion wheel of the extrusion assembly to move to the first position.

2. The extrusion device according to claim 1, characterized in that: The extrusion assembly further includes a bracket, the bracket is provided with a plurality of extrusion channels, each of the extrusion channels penetrates the bracket along a first direction and is configured to communicate with the corresponding extrusion gap; The active extrusion wheel is rotatably mounted on the bracket, and the driven extrusion wheel is spaced apart from the active extrusion wheel along a second direction, wherein the second direction is perpendicular to the first direction.

3. The extrusion device according to claim 2, characterized in that: The extrusion assembly also includes a movable frame and an elastic member, the driven extrusion wheel is rotatably mounted on the movable frame, the elastic member is arranged between the movable frame and the bracket, and the elastic member is configured to provide elastic force between the movable frame and the bracket when deformed to maintain the driven extrusion wheel in the second position.

4. The extrusion device according to claim 3, characterized in that: The second driving member drives the switching member to move relative to the extrusion assembly in a third direction, and the switching member abuts against the movable frame to move the driven extrusion wheel, and the third direction is perpendicular to the first direction and the second direction; In the second direction, there are at least two rows of the extrusion assemblies, and each row independently includes at least one extrusion assembly.

5. The extrusion device according to claim 4, characterized in that: The extrusion device further includes a first end plate and a second end plate, wherein the first end plate and the second end plate are spaced apart from each other along a third direction; The two rows of extrusion assemblies are spaced from each other along the second direction to define a movable space; each row of the extrusion assemblies comprises a plurality of extrusion assemblies sequentially overlapped between the first end plate and the second end plate along the third direction; The second driving member includes a driving motor and a transmission rod, the transmission rod extends along the third direction, the transmission rod is connected between the first end plate and the second end plate and is located in the activity space; the driving motor is installed on a side of the second end plate away from the first end plate and is transmission-connected to the transmission rod; The switching member is movably arranged in the activity space along three directions, and the switching member is transmission-connected to the transmission rod so as to move along the third direction under the drive of the transmission rod; the switching member includes two pushing parts, which are respectively located on both sides of the switching member along the second direction; The movable frame has an abutting top end, and the abutting top ends of the plurality of movable frames are respectively located on one side close to the activity space, and the abutting top ends of the plurality of movable frames are staggered in sequence along the third direction.

6. The extrusion device according to claim 5, characterized in that: The abutting top ends of the movable frames of the multiple extrusion assemblies in each row of the extrusion assemblies are respectively distributed at equal intervals along the third direction at a spacing d, and the two rows of the extrusion assemblies are staggered by d / 2 along the third direction, and when the pushing portion on one side abuts against the abutting top end of the movable frame on the corresponding side, the pushing portion on the other side is located in the gap between the two adjacent movable frames on the corresponding side.

7. The extrusion device according to claim 5, characterized in that: The switching member is respectively connected with sensors on both sides along the second direction; The extrusion assembly also includes a sensed member, which is movably connected to the bracket along a second direction. When consumables pass through the extrusion channel, the consumables extrude the sensed member along the second direction to a position close to the sensor.

8. The extrusion device according to claim 5, characterized in that: The active extrusion wheels of each row of the extrusion assemblies are rotatably mounted between the first end plate and the second end plate via a rotation axis; The switching assembly further includes a gear set, the gear set includes a driving gear and two driven gears, the first driving member is transmission-connected to the driving gear, and the driving gear is respectively meshed with the two driven gears; The two driven gears are respectively connected to the two rotating shafts to drive the two rotating shafts to rotate.

9. A print head device, characterized in that: include: The extrusion device according to any one of claims 1 to 8; A nozzle assembly is connected to the extrusion device and is used to receive and output the consumables extruded by the extrusion device.

10. A 3D printing device, characterized in that: include: Printing platform; and, The extrusion device according to any one of claims 1 to 8 or the print head device according to claim 9.

Images