Consumable buffering device, consumable conveying device and 3D printing equipment

Abstract

The utility model provides a consumable buffering device, a consumable conveying device and 3D printing equipment. The consumable buffering device comprises a shell, a first feeding piece, a second feeding piece and an elastic piece, and a mounting cavity is formed in the shell; the first feeding piece is arranged in the mounting cavity, is provided with a consumable inlet channel and is configured to receive and convey consumables; the second feeding part is arranged at one end of the first feeding part in the conveying direction of the consumables and provided with a consumable outlet channel communicated with the consumable inlet channel, the second feeding part is configured to receive and convey the consumables conveyed by the first feeding part, and at least part of the second feeding part is slidably arranged in the mounting cavity; one end, far away from the first feeding piece, of the first feeding piece can slide to penetrate out of the shell; one end of the elastic piece is elastically connected to the second feeding piece, and the elastic piece is configured to always provide elastic force close to the first feeding piece for the second feeding piece; when the second feeding piece is only subjected to the elastic force in the conveying direction of the consumables, the second feeding piece abuts against and communicates with the first feeding piece.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing, and particularly to a consumable buffer device, a consumable conveying device, and a 3D printing device. Background Art

[0002] Most 3D printers convey the consumables in the consumable cartridge to the nozzle through an extrusion mechanism. For large 3D printers, generally multiple extrusion mechanisms need to be provided to provide sufficient pulling force to convey the consumables. However, it is difficult to control multiple extrusion mechanisms to work synchronously, and it is easy for the consumables to be broken due to the non-synchronous work of some extrusion mechanisms, thereby affecting the printing quality. Summary of the Utility Model

[0003] The present application provides a consumable buffer device, a consumable conveying device, and a 3D printing device to solve the problem that the consumables are broken due to the non-synchronous work of multiple extrusion mechanisms in the known technology.

[0004] In a first aspect, the present application provides a consumable buffer device, including a housing, a first feeding member, a second feeding member, and an elastic member. An installation cavity is provided in the housing; the first feeding member is arranged in the installation cavity, the first feeding member has a consumable inlet channel, and the first feeding member is configured to receive and convey the consumables; along the conveying direction of the consumables, the second feeding member is arranged at one end of the first feeding member, the second feeding member has a consumable outlet channel, the consumable outlet channel is communicated with the consumable inlet channel, and the second feeding member is configured to receive and convey the consumables conveyed by the first feeding member; at least a part of the second feeding member is slidably arranged in the installation cavity, and the end of the second feeding member away from the first feeding member can slide out of the housing; one end of the elastic member is elastically connected to the second feeding member, and the elastic member is configured to always provide an elastic force for the second feeding member to approach the first feeding member; wherein, when the second feeding member is only affected by the elastic force in the conveying direction of the consumables, the second feeding member abuts against the first feeding member and is communicated with the first feeding member.

[0005] In a possible implementation manner, along the conveying direction of the consumables, the first feeding member includes a first feeding part and a second feeding part, the first feeding part, the second feeding part, and the second feeding member are sequentially communicated, and the second feeding part is configured to guide the sliding of the second feeding member;

[0006] When the second feeding member is only affected by the elastic force in the conveying direction of the consumables, the second feeding member abuts against the first feeding part, and the second feeding part is communicated with the second feeding member.

[0007] In a possible implementation, the other end of the elastic member away from the second feeding member is elastically connected to the first feeding portion, and the elastic member is configured to always provide an elastic force that brings the second feeding member closer to the first feeding portion.

[0008] In a possible implementation, a first convex portion is provided on the first feeding portion, a second convex portion is provided on the second feeding member, one end of the elastic member is elastically connected to the first convex portion, and the other end of the elastic member is elastically connected to the second convex portion;

[0009] Wherein, when the second feeding member abuts against the first feeding portion, the distance between the first convex portion and the second convex portion is greater than the original length of the elastic member.

[0010] In a possible implementation, a first convex portion is provided on the housing, the first convex portion is located on the side of the second feeding portion away from the first feeding portion, a second convex portion is provided on the second feeding member, one end of the elastic member is elastically connected to the first convex portion, and the other end of the elastic member is elastically connected to the second convex portion;

[0011] Wherein, when the second feeding member abuts against the first feeding portion, the distance between the first convex portion and the second convex portion is less than the original length of the elastic member.

[0012] In a possible implementation, a first convex portion is provided on the housing, the first convex portion is located on the side of the second feeding portion close to the first feeding portion, a second convex portion is provided on the second feeding member, one end of the elastic member is elastically connected to the first convex portion, and the other end of the elastic member is elastically connected to the second convex portion;

[0013] Wherein, when the second feeding member abuts against the first feeding portion, the distance between the first convex portion and the second convex portion is greater than the original length of the elastic member.

[0014] In a possible implementation, the consumable buffer device further includes a guiding member, the guiding member is located at the end of the first feeding member away from the second feeding member, and the guiding member is in communication with the consumable inlet channel. The end of the guiding member away from the first feeding member is exposed outside the housing, and a feeding channel is provided on the end face of the guiding member exposed outside the housing.

[0015] In a possible implementation, the number of the feeding channels is multiple, a plurality of feeding grooves are provided on the guiding member, the plurality of feeding grooves are correspondingly arranged with the plurality of feeding channels, and the extending directions of the plurality of feeding grooves are inclined to each other. One end of each feeding groove is respectively communicated with one of the feeding channels, and the other end of each feeding groove is communicated with the consumable inlet channel.

[0016] In a possible implementation, a perforation is formed in the outer wall of the housing, and the perforation communicates with the installation cavity. The perforation is configured to allow at least a part of the second feeding member to pass through.

[0017] In a possible implementation, a guiding portion is provided on the second feeding member, and a guiding groove is formed in one side of the housing. The guiding groove communicates with the installation cavity. The guiding portion is in sliding fit with the guiding groove, and one end of the guiding portion away from the second feeding member passes through the guiding groove and is exposed outside the housing.

[0018] In a second aspect, an embodiment of the present application further provides a consumable conveying device, including at least two extrusion mechanisms and the above-mentioned consumable buffering device. At least two of the extrusion mechanisms are arranged at intervals in sequence, and the consumable buffering device is located between two adjacent extrusion mechanisms.

[0019] In a third aspect, an embodiment of the present application further provides a 3D printing device, including a consumable cartridge, a nozzle device, and the above-mentioned consumable buffering device or the above-mentioned consumable conveying device. The consumable conveying device is configured to convey the consumable in the consumable cartridge to the nozzle device.

[0020] In the consumable buffering device of the present application, the second feeding member can slide relative to the first feeding member. When the traction forces on the consumable before entering the consumable buffering device and the consumable after leaving the consumable buffering device are uneven, friction occurs between the consumable and the second feeding member. Then, under the action of the frictional force exerted by the consumable on the second feeding member, the second feeding member slides relative to the first feeding member to adjust the distance between the second feeding member and the first feeding member, thereby buffering the consumable with uneven force. At the same time, one end of the second feeding member away from the first feeding member can slide out of the housing, so that the second feeding member can convey the consumable outside the housing, avoiding adding structures such as a discharge guiding member on the housing to guide the consumable outside the housing, and reducing the production cost. In addition, when the second feeding member does not convey the consumable or the traction forces on the consumables at both ends of the consumable buffering device are the same and there is no need to buffer the consumable, the second feeding member is only affected by the elastic force provided by the elastic member in the conveying direction of the consumable. The second feeding member abuts against the first feeding member and is in communication with the first feeding member, so that there is no gap between the second feeding member and the first feeding member, so that when the consumable needs to be buffered, the second feeding member can quickly respond and buffer the consumable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the consumable buffering device of the present application in an embodiment.

[0022] Figure 2 It is a partial structural schematic diagram of the consumable buffering device of the present application in an embodiment, in which the second feeding member abuts against the first feeding member.

[0023] Figure 3 For Figure 1 the sectional view schematic diagram of the consumable buffer device in one embodiment between the second feeding member and the first feeding member in

[0024] Figure 4 For Figure 1 the explosion schematic diagram of the consumable buffer device in one embodiment in

[0025] Figure 5 For Figure 1 the structural schematic diagram of the guiding member of the consumable buffer device in one embodiment in

[0026] Figure 6 For Figure 2 the structural schematic diagram of the second housing part of the consumable buffer device in one embodiment in

[0027] Figure 7 For Figure 1 the structural schematic diagram of another perspective of the consumable buffer device in one embodiment in

[0028] Figure 8 For Figure 1 the top view schematic diagram of the consumable buffer device in one embodiment, where the second feeding member is communicated with the discharging member in the figure.

[0029] Figure 9 The structural schematic diagram of the consumable conveying device of the present application in one embodiment.

[0030] Figure 10 The structural schematic diagram of the 3D printing device of the present application in one embodiment. Main element symbol description:

[0031] 3D printing device 300

[0032] Consumable conveying device 200

[0033] Consumable buffer device 100

[0034] First direction X

[0035] Second direction Y

[0036] Third direction Z

[0037] First surface P1

[0038] Second surface P2

[0039] Extrusion mechanism 1

[0040] Consumable cartridge 2

[0041] Nozzle device 3

[0042] Housing 10

[0043] First housing part 11

[0044] Mounting opening 111

[0045] Clamping structure 112

[0046] First protrusion 113

[0047] Connecting protrusion 114

[0048] Guide frame 115

[0049] Chute 1150

[0050] Perforation 116

[0051] First perforation 1161

[0052] Second perforation 1162 Second housing part 12 Guide groove 120 Second protrusion 121 Mounting cavity 13 First feeding part 20 Consumable inlet channel 201 First feeding section 21 First convex part 212 First fastener 213 Second feeding section 22 Second feeding part 30 Consumable outlet channel 301 Discharge channel 31 Guide part 32 First abutting protrusion 33 Second convex part 34 Light-blocking protrusion 340 Second fastener 35 Elastic part 40 Feeding part 50 Detection component 70 Circuit board 71 Detection element 72 Material guiding part 80 Feeding channel 81

[0053] First zone part 82

[0054] Second zone part 83

[0055] Third zone part 84

[0056] Fourth zone part 85

[0057] Feeding chute 850

[0058] Clamping groove 86

[0059] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0060] The following description will describe the content of the present application more comprehensively with reference to the drawings. The exemplary embodiments of the present application are shown in the drawings. 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 the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0061] 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, "comprising" and / or "including" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0062] 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 clearly defined in the text, terms such as those defined in a general dictionary should be construed as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be construed as idealized or overly formal meanings.

[0063] The following will refer to the drawings to further describe in detail the specific embodiments of the present application.

[0064] As Figures 1 to 3 shown and in combination with Figure 9 , this embodiment provides a consumable buffer device 100, which is disposed between two extrusion mechanisms 1 for conveying the same consumable. When the two extrusion mechanisms 1 do not work synchronously, resulting in different traction forces applied to the consumable by the two extrusion mechanisms 1, the buffer device can buffer the consumable to avoid situations such as uneven stress on the front and rear parts of the consumable and material breakage.

[0065] The consumable buffer device 100 includes a housing 10, a first feeding member 20, a second feeding member 30, and an elastic member 40.

[0066] For ease of subsequent reading, the present application introduces a first direction X, a second direction Y, and a third direction Z to describe the embodiments of the present application. The first direction X, the second direction Y, and the third direction Z may be three non-parallel linear directions in space; further, the first direction X, the second direction Y, and the third direction Z may be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In subsequent embodiments, the X-axis direction of the coordinate axis of the three-dimensional coordinate system is taken as the first direction X, the Y-axis direction of the coordinate axis of the three-dimensional coordinate system is taken as the second direction Y, and the Z-axis direction of the coordinate axis of the three-dimensional coordinate system is taken as the third direction Z for description.

[0067] An installation cavity 13 is provided inside the housing 10, and a first feeding member 20 is disposed inside the installation cavity 13. The first feeding member 20 is configured to receive and convey consumables, and the conveying direction of the consumables is parallel to the first direction X.

[0068] The second feeding member 30 is at least partially slidably disposed inside the installation cavity 13, and the second feeding member 30 is configured to be slidable relative to the first feeding member 20 along the first direction X. Along the conveying direction of the consumables, the second feeding member 30 is disposed at one end of the first feeding member 20. The first feeding member 20 has a consumable inlet passage 201, and the consumable inlet passage 201 is disposed at one end of the first feeding member 20 away from the second feeding member 30. The second feeding member 30 has a consumable outlet passage 301, and the consumable outlet passage 301 is located at one end of the second feeding member 30 away from the first feeding member 20. The consumable outlet passage 301 is communicated with the consumable inlet passage 201, so that the consumables enter the first feeding member 20 from the consumable inlet passage 201, the first feeding member 20 conveys the received consumables into the second feeding member 30, and then the second feeding member 30 conveys the consumables received from the first feeding member 20, and then the consumables leave the second feeding member 30 from the consumable outlet passage 301. One end of the second feeding member 30 away from the first feeding member 20 can slide out of the housing 10, so that the second feeding member 30 can convey the consumables outside the housing 10, avoiding adding structures such as a discharge guiding member on the housing 10 to guide the consumables outside the housing 10. In addition, when the traction force provided by the extrusion mechanism 1 on one side of the first feeding member 20 to the consumables is greater than the traction force provided by the extrusion mechanism 1 on one side of the second feeding member 30 to the consumables, the consumables at the consumable buffer device 100 will be squeezed, and the consumables will drive the second feeding member 30 in contact therewith to move away from the first feeding member 20.

[0069] One end of the elastic member 40 is elastically connected to the second feeding member 30. The elastic member 40 is configured to always provide an elastic force to the second feeding member 30 towards the first feeding member 20, that is, the elastic member 40 is always in a state of elastic deformation. When the second feeding member 30 moves away from the first feeding member 20 under the action of the frictional force of the consumable, the elastic member 40 continuously undergoes elastic deformation and always provides an elastic force to the second feeding member 30 towards the first feeding member 20. Thus, when the traction force provided by the extrusion mechanism 1 on one side of the first feeding member 20 to the consumable is less than the traction force provided by the extrusion mechanism 1 on one side of the second feeding member 30 to the consumable, the second feeding member 30 moves towards the first feeding member 20 to reset under the action of the elastic force generated by the reset of the elastic member 40.

[0070] In addition, when the consumable buffer device 100 stops working or when the traction force provided by the extrusion mechanism 1 on one side of the first feeding member 20 to the consumable is equal to the traction force provided by the extrusion mechanism 1 on one side of the second feeding member 30 to the consumable, the second feeding member 30 is only affected by the elastic force in the conveying direction of the consumable. The second feeding member 30 abuts against the first feeding member 20 and is in communication with the first feeding member 20. At this time, the elastic member 40 is still in a state of elastic deformation, and the elastic member 40 continues to provide an elastic force to the second feeding member 30 towards the first feeding member 20, so that the second feeding member 30 abuts tightly against the first feeding member 20 and keeps the two in a fitting state. Furthermore, when the consumable needs to be buffered, the second feeding member 30 can respond in time to buffer the consumable.

[0071] In this way, in the consumable buffer device 100 of the present application, the second feeding member 30 can slide relative to the first feeding member 20. When the traction forces of the consumable before entering the consumable buffer device 100 and the consumable after leaving the consumable buffer device 100 are uneven, friction occurs between the consumable and the second feeding member 30. Then, under the action of the frictional force exerted by the consumable on the second feeding member 30, the second feeding member 30 slides relative to the first feeding member 20 to adjust the distance between the second feeding member 30 and the first feeding member 20, thereby buffering the consumable with uneven force. In addition, when the second feeding member 30 does not convey the consumable or when the traction forces of the consumables at both ends of the consumable buffer device 100 are the same and there is no need to buffer the consumable, the second feeding member 30 is only affected by the elastic force provided by the elastic member 40 in the conveying direction of the consumable. The second feeding member 30 abuts against the first feeding member 20 and is in communication with the first feeding member 20, so that there is no gap between the second feeding member 30 and the first feeding member 20. When the consumable needs to be buffered, the second feeding member 30 can quickly respond to buffer the consumable.

[0072] Please also combine Figure 1 and Figure 3, in one embodiment, along the first direction X, the first feeding member 20 includes a first feeding portion 21 and a second feeding portion 22. The first feeding portion 21, the second feeding portion 22, and the second feeding member 30 are sequentially communicated to convey the consumables into the second feeding member 30. The first feeding portion 21 and the second feeding portion 22 are integrally formed, and the extending directions of the first feeding portion 21 and the second feeding portion 22 are also parallel to the first direction X.

[0073] The second feeding portion 22 is configured to guide the sliding of the second feeding member 30 to improve the sliding stability of the second feeding member 30.

[0074] Furthermore, the second feeding portion 22 is configured to be completely inserted into the second feeding member 30 to prevent the second feeding member 30 from being obstructed by the second feeding portion 22 when sliding towards the first feeding portion 21. In addition, one end of the second feeding portion 22 away from the first feeding portion 21 extends into the second feeding member 30, which not only conveys the consumables conveyed by the first feeding member 20 into the second feeding member 30, but also plays a guiding role in the sliding of the second feeding member 30 through the second feeding portion 22 extending into the second feeding member 30.

[0075] The second feeding member 30 is provided with a discharge channel 31. The discharge channel 31 extends along the first direction X and penetrates the second feeding member 30. The discharge channel 31 is communicated with the consumable outlet channel 301. The inner diameter of the discharge channel 31 is larger than the outer diameter of the second feeding portion 22, and the extending length of the discharge channel 31 is greater than the extending length of the second feeding portion 22 to ensure that the second feeding portion 22 can be completely accommodated in the second feeding member 30.

[0076] In particular, along the first direction X, the outer diameters of the respective sections of the second feeding portion 22 can be the same or different, as long as it is ensured that the maximum outer diameter of the second feeding portion 22 is smaller than the inner diameter of the discharge channel 31.

[0077] When the second feeding member 30 is only under the action of the elastic force provided by the elastic member 40 in the conveying direction of the consumables, the second feeding member 30 abuts against the end face of the first feeding portion 21 close to the second feeding portion 22, and the second feeding member 30 is communicated with the second feeding portion 22 extending into it.

[0078] It can be understood that in other embodiments, the second feeding portion 22 can also be configured to be sleeved on the outer peripheral surface of the second feeding member 30 to play a guiding role in the sliding of the second feeding member 30.

[0079] Please also combine Figures 4 to 6 , and refer to Figure 1 and Figure 2 , in one embodiment, along the third direction Z, the housing 10 includes a first housing portion 11 and a second housing portion 12 connected to each other. The first housing portion 11 and the second housing portion 12 enclose an installation cavity 13.

[0080] The first feeding member 20 is fixed within the first housing portion 11. The second feeding member 30 is at least partially located within the first housing portion 11 and is slidably connected to the first housing portion 11.

[0081] Furthermore, the consumable buffer device 100 further includes a guiding member 80. The guiding member 80 is located at one end of the first feeding member 20 away from the second feeding member 30, and the guiding member 80 communicates with the consumable inlet passage 201, so as to convey the consumable into the first feeding member 20 through the guiding member 80.

[0082] One end of the guiding member 80 away from the first feeding member 20 is exposed outside the first housing portion 11, and a feeding passage 81 is provided on the end face of the end of the guiding member 80 exposed outside the housing 10.

[0083] Specifically, along the conveying direction of the consumable, the guiding member 80 includes a first section 82, a second section 83, a third section 84, and a fourth section 85 that are sequentially connected. The first section 82, the second section 83, the third section 84, and the fourth section 85 are integrally formed.

[0084] The first section 82 is a rectangular structure arranged along the third direction Z. The second section 83 protrudes outward along the first direction X from the surface of the first section 82 on the side close to the first feeding member 20. The third section 84 protrudes outward along the first direction X from the surface of the second section 83 on the side close to the first feeding member 20.

[0085] Both the second section 83 and the third section 84 are rectangular structures. The outer contours of the first section 82 and the third section 84 both exceed the outer contour of the second section 83, so as to form a clamping groove 86 that surrounds the outer peripheral surface of the second section 83 between the first section 82 and the third section 84.

[0086] It can be understood that the shapes of the first section 82, the second section 83, and the third section 84 can also be other shapes such as circular.

[0087] Along the first direction X, the side plate of the first housing portion 11 on the feeding side is provided with an installation opening 111. The shape of the installation opening 111 is rectangular, and the size of the installation opening 111 is smaller than the size of the side plate where it is located, so that the side plate of the first housing portion 11 on the feeding side forms a clamping structure 112. The shape of the clamping structure 112 is generally "U" - shaped, and the clamping structure 112 is clamped within the clamping groove 86. When the clamping structure 112 is clamped within the clamping groove 86, the inner peripheral surface of the clamping structure 112 abuts against the groove wall of the clamping groove 86, and the clamping structure 112 is clamped by the first section 82 and the third section 84, thereby realizing the limitation between the guiding member 80 and the first housing portion 11.

[0088] Accordingly, the second housing portion 12 is also formed with a clamping structure 112 to limit the material guiding member 80 through the first housing portion 11 and the second housing portion 12 simultaneously. The principle of the second housing portion 12 forming the clamping structure 112 is the same as that of the first housing portion 11, and will not be elaborated here.

[0089] In this embodiment, a feeding channel 81 is formed on a side of the first zone portion 82 away from the second zone portion 83. Along the first direction X, the feeding channel 81 penetrates through the first zone portion 82, the second zone portion 83, and the third zone portion 84. The consumable buffer device 100 further includes a feeding member 50, and the feeding member 50 is a columnar structure with openings at both ends and a hollow interior. The feeding member 50 is clamped in the feeding channel 81, and a sealing arrangement is provided between the outer peripheral surface of the feeding member 50 and the inner peripheral surface of the feeding channel 81.

[0090] Particularly, the number of the feeding channels 81 is multiple, and a feeding member 50 is accommodated in each feeding channel 81. The multiple feeding channels 81 can be arranged at intervals in sequence along the second direction Y, or can be arranged in a rectangular array. The specific number and arrangement mode can be adaptively selected according to actual design requirements.

[0091] It can be understood that in other embodiments, the number of the feeding channels 81 can also be one.

[0092] Please also refer to Figures 4 to 6 In an embodiment, the fourth zone portion 85 protrudes outward along the first direction X from a surface of the third zone portion 84 close to the first feeding member 20, and one end of the fourth zone portion 85 away from the third zone portion 84 is communicated with the consumable inlet channel 201. A plurality of feeding grooves 850 are provided on the fourth zone portion 85. The plurality of feeding grooves 850 are correspondingly arranged with the plurality of feeding channels 81, and the extending directions of the plurality of feeding grooves 850 are inclined to each other. One end of each feeding groove 850 is communicated with a feeding channel 81 respectively, and the other end of each feeding groove 850 is communicated with the consumable inlet channel 201, so that the consumables entering from different feeding channels 81 can converge in the first feeding member 20.

[0093] In this embodiment, the number of the feeding channels 81 is four, and the number of the feeding grooves 850 is also four. The shape of the fourth zone portion 85 is generally conical, and has a first surface P1 and a second surface P2 oppositely arranged along the third direction Z. Both the first surface P1 and the second surface P2 are inclined with respect to the first direction X.

[0094] Along the conveying direction of the consumable, the first surface P1 is inclined forward and upward, and the second surface P2 is inclined forward and downward. Two feeding grooves 850 are provided on the first surface P1 at intervals along the second direction Y, and the extending direction of the two feeding grooves 850 provided on the first surface P1 is the same as the inclined direction of the first surface P1. Two feeding grooves 850 are provided on the second surface P2 at intervals along the second direction Y, and the extending direction of the two feeding grooves 850 provided on the second surface P2 is the same as the inclined direction of the second surface P2.

[0095] Further, a first protrusion 113 protrudes along the third direction Z on one side of the first housing part 11 close to the second housing part 12. The end face of one end of the first protrusion 113 close to the second housing part 12 is inclined and abuts against the first surface P1, so as to close the two feeding grooves 850 located on the first surface P1 by the first protrusion 113. The first protrusion 113 can be formed by stamping on the surface of the first housing part 11 away from the second housing part 12.

[0096] Correspondingly, a second protrusion 121 protrudes along the third direction Z on one side of the second housing part 12 close to the first housing part 11. The end face of one end of the second protrusion 121 close to the first housing part 11 is inclined and abuts against the second surface P2, so as to close the two feeding grooves 850 located on the second surface P2 by the second protrusion 121. The second protrusion 121 can be formed by stamping on the surface of the second housing part 12 away from the first housing part 11.

[0097] Please also combine Figure 7 and refer to Figure 1 and Figure 4 In an embodiment, a first convex part 212 is provided on the outer surface of the first feeding part 21. The number of the first convex parts 212 is two, and along the second direction Y, the two first convex parts 212 are respectively arranged on the opposite sides of the first feeding part 21. Two connecting protrusions 114 protrude from the bottom wall of the inner cavity of the first housing part 11, and the two connecting protrusions 114 are arranged corresponding to the two first convex parts 212. After the first convex part 212 and the connecting protrusion 114 are both perforated, a first fastener 213 passes through, so as to fix the first feeding part 21 on the first housing part 11 through the first fastener 213. The first fastener 213 is a part such as a screw.

[0098] Further, a second convex part 34 is provided on the outer surface of the second feeding part 30. The number of the second convex parts 34 is two, and along the second direction Y, the two second convex parts 34 are respectively arranged on the opposite sides of the second feeding part 30. After the two second convex parts 34 are both perforated, a second fastener 35 passes through, and the second fastener 35 is a part such as a screw.

[0099] There are two elastic members 40, and the elastic members 40 are springs. Along the second direction Y, the two elastic members 40 are respectively arranged on the opposite sides of the second feeding member 30. The extending direction of the elastic member 40 is parallel to the first direction X. One end of the elastic member 40 is connected to the first fastener 213 and is clamped between the first convex portion 212 and the end of the first fastener 213. The other end of the elastic member 40 is connected to the second fastener 35 and is clamped between the second convex portion 34 and the end of the second fastener 35.

[0100] Wherein, when the second feeding member 30 abuts against the first feeding portion 21, the distance between the first convex portion 212 and the second convex portion 34 is greater than the original length of the elastic member 40, so that the elastic member 40 is always in a stretched state, and thus the elastic member 40 always provides an elastic force for the second feeding member 30 to approach the first feeding portion 21.

[0101] It can be understood that in other embodiments, the other end of the elastic member 40 away from the second feeding member 30 is elastically connected to the first housing portion 11. For example, the first convex portion 212 is arranged on the inner surface of the first housing portion 11, and the first convex portion 212 is located on the side of the second feeding portion 22 away from the first feeding portion 21.

[0102] Wherein, when the second feeding member 30 abuts against the first feeding portion 21, the distance between the first convex portion 212 and the second convex portion 34 is less than the original length of the elastic member 40, so that the elastic member 40 is always in a compressed state, and thus the elastic member 40 always provides an elastic force for the second feeding member 30 to approach the first feeding portion 21.

[0103] It can be understood that in other embodiments, the other end of the elastic member 40 away from the second feeding member 30 is elastically connected to the first housing portion 11. For example, the first convex portion 212 is arranged on the inner surface of the first housing portion 11, and the first convex portion 212 is located on the side of the second feeding portion 22 close to the first feeding portion 21.

[0104] Wherein, when the second feeding member 30 abuts against the first feeding portion 21, the distance between the first convex portion 212 and the second convex portion 34 is greater than the original length of the elastic member 40, so that the elastic member 40 is always in a stretched state, and thus the elastic member 40 always provides an elastic force for the second feeding member 30 to approach the first feeding portion 21.

[0105] In this way, the setting position of the first convex portion 212 in the present application can be selected according to actual design requirements, as long as it is ensured that the elastic member 40 can always provide an elastic force for the second feeding member 30 to approach the first feeding portion 21.

[0106] Please combine with Figures 7 to 9 and refer to Figure 1, in one embodiment, along the second direction Y, guiding frames 115 are provided on the inner walls of two adjacent sides of the first housing part 11, and the second feeding member 30 is located between the two guiding frames 115. A sliding groove 1150 is formed on one adjacent side of the two guiding frames 115, and the two second convex parts 34 are respectively in sliding fit with the two sliding grooves 1150, and the opposite sides of the two second convex parts 34 respectively abut against the two adjacent sides of the two guiding frames 115 to guide the sliding of the second feeding member 30.

[0107] Further, a guiding part 32 is provided on the outer surface of the second feeding member 30, and the guiding part 32 protrudes upward along the third direction Z from the side of the second feeding member 30 close to the second housing part 12. A guiding groove 120 is formed on the side of the second housing part 12 away from the first housing part 11, and the guiding groove 120 extends along the first direction X and communicates with the installation cavity 13. The guiding part 32 is partially located in the guiding groove 120 and is in sliding fit with the guiding groove 120, and the end of the guiding part 32 away from the second feeding member 30 passes through the guiding groove 120 and is exposed outside the housing 10.

[0108] In this way, the guiding part 32 provided on the second feeding member 30 is exposed outside the housing 10, which can not only observe the position of the second feeding member 30, but also drive the second feeding member 30 to move by pushing and pulling the guiding part 32.

[0109] In this embodiment, a perforation 116 is formed on the outer wall of the housing 10, and along the first direction X, the perforation 116 penetrates through the side plate of the housing 10 on the discharging side and then communicates with the installation cavity 13. The aperture of the perforation 116 is larger than the outer diameter of the second feeding member 30, and the perforation 116 is configured to allow at least part of the second feeding member 30 to pass through. When the second feeding member 30 is driven to move in a direction away from the first feeding member 20 under the action of the frictional force applied by the consumable to the second feeding member 30, the end of the second feeding member 30 away from the first feeding member 20 can pass through the perforation 116 and be exposed outside the housing 10, so that the consumable can be conveyed to the housing 10 through the second feeding member 30, facilitating the extrusion mechanism 1 located on the discharging side of the consumable buffer device 100 to directly dock with the second feeding member 30 to receive the consumable, avoiding adding structures such as a discharging guiding member on the housing 10 to guide the consumable outside the housing 10, and reducing the production cost.

[0110] Specifically, the shape of the perforation 116 is circular, and the perforation 116 is formed by enclosing a first perforation 1161 and a second perforation 1162. The shapes of the first perforation 1161 and the second perforation 1162 are semi-circular. The first perforation 1161 is formed on the first housing part 11, and the second perforation 1162 is formed on the second housing part 12. Thus, when the first housing part 11 is connected to the second housing part 12, the first perforation 1161 communicates with the second perforation 1162 and they jointly form the perforation 116.

[0111] Please combine with Figure 7, and refer to Figure 1 and Figure 9 , in one embodiment, the consumable buffer device 100 further includes a detection component 70 for detecting the moving position of the second feeding member 30. The detection component 70 includes a circuit board 71 and two detection elements 72.

[0112] The circuit board 71 is fixed inside the first bottom cover. The circuit board 71 is disposed near the discharging side of the first bottom cover and is located below the second feeding member 30. Along the first direction X, the two detection elements 72 are spaced apart on the circuit board 71, and both are electrically connected to the circuit board 71. The detection element 72 is a photoelectric switch. A light-blocking protrusion 340 protrudes from the bottom end surface of the second protrusion 34. When the light-blocking protrusion 340 moves with the second feeding member 30 to pass by the photoelectric switch, the light-blocking protrusion 340 blocks the detection light emitted from the photoelectric switch, thereby realizing the detection of the current position of the second feeding member 30.

[0113] Particularly, when the light-blocking protrusion 340 blocks the detection light emitted from one photoelectric switch, the second feeding member 30 abuts against the first feeding portion 21. When the light-blocking protrusion 340 blocks the detection light emitted from the other photoelectric switch, the second feeding member 30 partially penetrates through the through hole 116, and the second protrusion 34 abuts against the inner wall of the first housing portion 11. At this time, the second feeding member 30 moves to the limit position, and the detection element 72 can send the detection signal that the second feeding member 30 moves to the limit position to a control device (not shown in the figure), and the control device then adjusts the working states of the two extrusion mechanisms 1.

[0114] It can be understood that the detection element 72 can also adopt other electronic components such as a laser rangefinder that can detect the position of the second feeding member 30, and the distance between the two detection elements 72 can be adjusted according to the detection requirements.

[0115] As Figure 9 shown, the embodiment of the present application further provides a consumable conveying device 200, including at least two extrusion mechanisms 1 and the above-mentioned consumable buffer device 100. The extrusion mechanism 1 is used to provide a traction force for the consumable to traction the movement of the consumable, and the specific structure of the extrusion mechanism 1 is not limited in the present application. Along the first direction X, at least two extrusion mechanisms 1 are sequentially arranged at intervals, and the consumable buffer device 100 is located between two adjacent extrusion mechanisms 1.

[0116] It can be understood that the number of the extrusion mechanisms 1 can be two, or can be three or other numbers. The specific number of the extrusion mechanisms 1 can be selected according to the actual printing requirements. When the number of the extrusion mechanisms 1 exceeds two, a consumable buffer device 100 can be arranged between any two adjacent extrusion mechanisms 1 to ensure the stability of the consumable transmission.

[0117] As Figure 10 shown, and in combination withFigure 9 In addition, an embodiment of the present application further provides a 3D printing device 300, including a consumable cartridge 2, a nozzle device 3, and the above-mentioned consumable buffer device 100 or the above-mentioned consumable conveying device 200.

[0118] The consumable cartridge 2 is used to store consumables. The consumable conveying device 200 conveys the consumables in the consumable cartridge 2 to the nozzle device 3, and then the consumables are ejected along a preset path through the nozzle device 3 and cured to form a printed part.

[0119] In the above text, the specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. A consumables buffer device, characterized in that: include: A housing having a mounting cavity therein; A first feeding member, which is disposed in the mounting cavity, has a consumable material inlet channel, and is configured to receive and transport consumable materials; A second feeding member, along the conveying direction of the consumables, the second feeding member is arranged at one end of the first feeding member, the second feeding member has a consumables outlet channel, the consumables outlet channel is connected to the consumables inlet channel, and the second feeding member is configured to receive and convey the consumables conveyed by the first feeding member; The second feeding member is at least partially slidably disposed in the mounting cavity, and an end of the second feeding member away from the first feeding member can slide to pass through the housing; an elastic member, one end of which is elastically connected to the second feeding member, and the elastic member is configured to always provide an elastic force for the second feeding member to approach the first feeding member; Wherein, when the second feeding member is only acted upon by the elastic force in the conveying direction of the consumables, the second feeding member abuts against the first feeding member and is connected with the first feeding member.

2. The consumable material buffer device according to claim 1, characterized in that: Along the conveying direction of the consumables, the first feeding member includes a first feeding portion and a second feeding portion, the first feeding portion, the second feeding portion, and the second feeding member are sequentially connected, and the second feeding portion is configured to guide the second feeding member to slide; When the second feeding member is only acted upon by the elastic force in the conveying direction of the consumables, the second feeding member abuts against the first feeding portion, and the second feeding portion is connected to the second feeding member.

3. The consumable material buffer device according to claim 2, characterized in that: The other end of the elastic member away from the second feeding member is elastically connected to the first feeding portion, and the elastic member is configured to always provide an elastic force for the second feeding member to approach the first feeding portion.

4. The consumable material buffer device according to claim 3, characterized in that: The first feeding part is provided with a first convex part, the second feeding part is provided with a second convex part, one end of the elastic member is elastically connected to the first convex part, and the other end of the elastic member is elastically connected to the second convex part; Wherein, when the second feeding member abuts against the first feeding portion, the distance between the first convex portion and the second convex portion is greater than the original length of the elastic member.

5. The consumable material buffer device according to claim 2, characterized in that: The housing is provided with a first convex portion, the first convex portion is located on a side of the second feeding portion away from the first feeding portion, the second feeding member is provided with a second convex portion, one end of the elastic member is elastically connected to the first convex portion, and the other end of the elastic member is elastically connected to the second convex portion; Wherein, when the second feeding member abuts against the first feeding portion, the distance between the first convex portion and the second convex portion is smaller than the original length of the elastic member.

6. The consumable material buffer device according to claim 2, characterized in that: The housing is provided with a first convex portion, the first convex portion is located on a side of the second feeding portion close to the first feeding portion, the second feeding member is provided with a second convex portion, one end of the elastic member is elastically connected to the first convex portion, and the other end of the elastic member is elastically connected to the second convex portion; Wherein, when the second feeding member abuts against the first feeding portion, the distance between the first convex portion and the second convex portion is greater than the original length of the elastic member.

7. The consumable material buffer device according to claim 1, characterized in that: The consumable material buffer device also includes a material guide member, which is located at an end of the first material feeding member away from the second material feeding member, and the material guide member is connected to the consumable material inlet channel, the end of the material guide member away from the first material feeding member is exposed to the shell, and a feed channel is provided on the end surface of the end of the material guide member exposed to the shell.

8. The consumable material buffer device according to claim 7, characterized in that: There are multiple feed channels, and the material guide is provided with multiple feed troughs, which are arranged corresponding to the multiple feed channels, and the extension directions of the multiple feed troughs are arranged obliquely to each other, one end of each feed trough is connected to one feed channel, and the other end of each feed trough is connected to the consumable inlet channel.

9. The consumable material buffer device according to claim 1, characterized in that: A through hole is formed on the outer wall of the shell, the through hole is connected to the installation cavity, and the through hole is configured to allow the second feeding member to at least partially pass through.

10. The consumable material buffer device according to claim 1, characterized in that: The second feeding piece is provided with a guide portion, a guide groove is opened on one side of the shell, the guide groove is connected to the installation cavity, the guide portion is slidably matched with the guide groove, and one end of the guide portion away from the second feeding piece passes through the guide groove and is exposed to the shell.

11. A consumable material conveying device, characterized in that: It comprises at least two extrusion mechanisms and the consumables buffer device according to any one of claims 1 to 10, wherein at least two of the extrusion mechanisms are arranged in sequence and spaced apart, and the consumables buffer device is located between two adjacent extrusion mechanisms.

12. A 3D printing device, characterized in that: It comprises a consumable box, a nozzle device, and a consumable buffer device as described in any one of claims 1 to 10 or a consumable conveying device as described in claim 11, wherein the consumable conveying device is configured to convey the consumables in the consumable box to the nozzle device.

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