Feeding mechanism and 3D printer

Abstract

The utility model relates to the technical field of 3D printing, and discloses a feeding mechanism and a 3D printer. The feeding mechanism comprises a shell, a channel assembly and a wire feeding assembly. The channel assembly comprises a first component and a second component, the first component is provided with at least two first channels, the second component is provided with at least two second channels, and the first channels and the second channels are used for wire materials to penetrate through. The wire feeding assembly is arranged between the first component and the second component and used for driving wire materials to move. Compared with the structure that a user needs to manually replace different wire materials in the prior art, the structure that the channel assembly of the feeding mechanism is provided with the at least two first channels and the second channels is arranged, and at least two or more kinds of wire materials of the same or different materials, colors and the like can be contained at the same time; and the line materials in one first channel can be directly selected and driven to move according to requirements, and the rapid switching of the line materials is beneficial to improving the printing efficiency.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of 3D printing technology, in particular to a feeding mechanism and a 3D printer. BACKGROUND

[0002] In the field of 3D printing technology, a 3D printed part is formed by heating and melting a wire material and extruding it to coat according to a predetermined trajectory. According to different printing requirements, different materials or different colors of wire materials need to be switched during printing.

[0003] The existing 3D printing equipment can only accommodate one type of wire material. When the wire material needs to be replaced, manual replacement of different wire materials for printing is required, and the replacement process is complicated. CONTENT OF THE INVENTION

[0004] The technical problem solved by the embodiment of the present application is to provide a feeding mechanism and a 3D printer, which can accommodate multiple wire materials through multiple channels, simplify the replacement process, and improve printing efficiency.

[0005] To solve the above technical problems, one technical solution adopted by the embodiment of the present application is to provide a feeding mechanism, which comprises a housing, a channel assembly and a wire feeding assembly. The housing is provided with a mounting cavity. The channel assembly is arranged in the mounting cavity, and the channel assembly comprises a first part and a second part. The first part is provided with at least two first channels, and the second part is provided with at least two second channels. A first channel and a second channel are arranged correspondingly, and the first channel and the second channel are used for passing wire materials. The wire feeding assembly is arranged between the first part and the second part, and the wire feeding assembly is used to drive the wire material in one of the first channels to move.

[0006] In some embodiments, the first channel comprises a first channel and a second channel, the second channel comprises a third channel and a fourth channel, the first channel and the third channel are arranged correspondingly to pass the first wire material, and the second channel and the fourth channel are arranged correspondingly to pass the second wire material.

[0007] In some embodiments, the wire feeding assembly comprises a driving part, a selection part, a first clamping part and a second clamping part. The first clamping part and the second clamping part are rotatably arranged on the housing and located on both sides of the driving part respectively. The selection part drives the first clamping part to move away from or close to the driving part, and / or the selection part drives the second clamping part to move away from or close to the driving part.

[0008] In some embodiments, the driving component comprises a driving wheel; the selecting component comprises a transmission shaft and a first eccentric wheel fixed to the transmission shaft; the first clamping component comprises a first rotating shaft, a first clamping arm and a first driven wheel, the first rotating shaft is arranged in the housing, the first clamping arm is rotatably arranged on the first rotating shaft, and the first driven wheel is rotatably arranged on the first clamping arm; the first clamping arm abuts against the first eccentric wheel, and the first driven wheel can be away from or close to the driving wheel; the second clamping component comprises a second rotating shaft, a second clamping arm and a second driven wheel, the second rotating shaft is arranged in the housing, the second clamping arm is rotatably arranged on the second rotating shaft, and the second driven wheel is rotatably arranged on the second clamping arm; the second clamping arm abuts against the first eccentric wheel, and the second driven wheel can be away from or close to the driving wheel.

[0009] In some embodiments, the first eccentric wheel has a first far center point and a first near center point; the first clamping arm abuts against the first eccentric wheel and switches between the first far center point and the first near center point, so that the first driven wheel is away from or close to the driving wheel; the second clamping arm abuts against the first eccentric wheel and switches between the first far center point and the first near center point, so that the second driven wheel is away from or close to the driving wheel; when the first driven wheel is close to the driving wheel, the second driven wheel is away from the driving wheel; when the second driven wheel is close to the driving wheel, the first driven wheel is away from the driving wheel.

[0010] In some embodiments, the first end of the first clamping arm abuts against the first eccentric wheel, the second end of the first clamping arm is arranged with the first driven wheel, and the first rotating shaft is arranged between the two ends of the first clamping arm; the first end of the second clamping arm abuts against the first eccentric wheel, the second end of the second clamping arm is arranged with the second driven wheel, and the second rotating shaft is arranged between the two ends of the second clamping arm. Alternatively, the first end of the first clamping arm abuts against the first eccentric wheel, the second end of the first clamping arm is rotatably connected with the first rotating shaft, and the first driven wheel is arranged between the two ends of the first clamping arm. The first end of the second clamping arm abuts against the first eccentric wheel, the second end of the second clamping arm is rotatably connected with the second rotating shaft, and the second driven wheel is arranged between the two ends of the second clamping arm.

[0011] In some embodiments, the first clamping component further comprises a first elastic member, the first elastic member is connected with the first clamping arm and the housing respectively, and the first elastic member drives the first clamping arm to keep abutting against the first eccentric wheel. The second clamping component further comprises a second elastic member, the second elastic member is connected with the second clamping arm and the housing respectively, and the second elastic member drives the second clamping arm to keep abutting against the first eccentric wheel.

[0012] In some embodiments, the first elastic member is a first torsion spring, the first torsion spring comprises a first main body part, a first torsion arm and a second torsion arm, the first main body part is sleeved on the first rotating shaft, the first torsion arm is fixed with the first clamping arm, and the second torsion arm is fixed with the housing. The second elastic member is a second torsion spring, the second torsion spring comprises a second main body part, a third torsion arm and a fourth torsion arm, the second main body part is sleeved on the second rotating shaft, the third torsion arm is fixed with the second clamping arm, and the fourth torsion arm is fixed with the housing.

[0013] In some embodiments, the wire feeding assembly further comprises a zeroing component connected with the selecting component, the zeroing component being configured to detect whether the selecting component is in a zero position, and when the selecting component is in the zero position, the first passive wheel and the second passive wheel are both away from the driving wheel.

[0014] In some embodiments, the zeroing component comprises a zero position detection disc fixed to the transmission shaft and provided with a zero position gap, and a photoelectric detector arranged in the housing and configured to detect the zero position gap; or the zero position detection disc is provided with a zero position protrusion, and the photoelectric detector is arranged in the housing and configured to detect the zero position protrusion. Alternatively, the zeroing component comprises a trigger portion arranged on the transmission shaft and a sensor arranged in the housing and in electrical or mechanical contact with the trigger portion.

[0015] In some embodiments, the first channel comprises a fifth channel and a sixth channel, and the second channel comprises a seventh channel and an eighth channel, the fifth channel and the seventh channel are arranged correspondingly, and the sixth channel and the eighth channel are arranged correspondingly. The wire feeding assembly further comprises a third clamping component and a fourth clamping component movably arranged in the housing and respectively located on two sides of the driving component. The selecting component further comprises a second eccentric wheel fixed to the transmission shaft, the first eccentric wheel and the second eccentric wheel are adjacent to or spaced apart in the axial direction of the transmission shaft, and the first eccentric wheel and the second eccentric wheel are arranged in a staggered manner in the circumferential direction of the transmission shaft, and the third clamping component and the fourth clamping component are both in abutment with the second eccentric wheel. The selecting component drives the third clamping component to move away from or close to the driving component through the second eccentric wheel; and / or, the selecting component drives the fourth clamping component to move away from or close to the driving component through the second eccentric wheel.

[0016] To solve the above technical problems, another technical scheme adopted by the embodiments of the present application is to provide a 3D printer comprising a feeding mechanism.

[0017] The beneficial effects of the embodiment of the present application are: the feeding mechanism of the embodiment of the present application comprises a shell, a channel assembly and a wire feeding assembly. The shell is provided with a mounting cavity. The channel assembly is arranged in the mounting cavity, and the channel assembly comprises a first part and a second part. The first part is provided with at least two first channels, and the second part is provided with at least two second channels. One first channel and one second channel are arranged correspondingly, and the first channel and the second channel are both used for passing wire material. The wire feeding assembly is arranged between the first part and the second part, and the wire feeding assembly is used for selecting and driving the wire material in one of the first channels to move. Compared with the structure in the prior art that needs to be manually replaced by the user, the channel assembly of the feeding mechanism of the embodiment of the present application has the structure of at least two first channels and second channels, which can simultaneously accommodate at least two or more wire materials of the same or different materials, colors and the like. The wire material in one of the first channels can be directly selected and driven to move according to the requirement. The rapid switching of the wire material helps to improve the printing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the drawings needed in the specific embodiment description of the present application will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0019] Figure 1 is an exploded view of the feeding mechanism of the embodiment of the present application;

[0020] Figure 2 is an exploded view of part of the structure of the feeding mechanism of the embodiment of the present application;

[0021] Figure 3 is Figure 2 is an enlarged schematic view of part A in

[0022] Figure 4 is an assembly schematic view of the feeding mechanism of the embodiment of the present application;

[0023] Figure 5 is an exploded view of part of the structure of the feeding mechanism of another embodiment of the present application;

[0024] Figure 6 is an assembly schematic view of the feeding mechanism of another embodiment of the present application;

[0025] Figure 7 is a schematic view of the zero-reset part of the feeding mechanism of the embodiment of the present application;

[0026] Figure 8 is a sectional view of the zero-reset part of the feeding mechanism of the embodiment of the present application. DETAILED DESCRIPTION

[0027] For the purpose of promoting an understanding of the present application, the present application will now be described in greater detail with reference to the accompanying drawings and specific embodiments. It is noted that when an element is referred to as being "on" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like as used herein are used for ease of description in relation to the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and thus cannot be construed as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be construed as limiting the present application. In addition, the terms "first", "second", and the like are used only for the purpose of description and cannot be construed as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used in the present specification are intended to have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are merely intended for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more of the associated listed items.

[0029] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0030] Please refer to Figure 1 The feeding mechanism 100 according to the embodiments of the present application includes a housing 10, a channel assembly 20, and a wire feeding assembly 30. The channel assembly 20 and the wire feeding assembly 30 are mounted to the housing 10. In some examples, the housing 10 has a mounting cavity 11 inside. Part or all of the channel assembly 20 is arranged in the mounting cavity 11. The channel assembly 20 includes a first part 21 and a second part 22. The first part 21 is provided with at least two first channels 21a, and the second part 22 is provided with at least two second channels 22a. The first channels 21a and the second channels 22a are both used for passing wire materials. The number of the first channels 21a is equal to the number of the second channels 22a, and one first channel 21a and one second channel 22a are arranged correspondingly. The same wire material passes through the first channel 21a and the second channel 22a in sequence.

[0031] The wire feeding assembly 30 is arranged between the first part 21 and the second part 22 in the mounting cavity 11. The channel assembly 20 is provided with at least two first channels 21a and second channels 22a, so that the feeding mechanism 100 can deploy at least two wire materials at the same time. The wire feeding assembly 30 is used to select and drive one of the at least two wire materials to move.

[0032] Compared with the structure that the feeding mechanism in the prior art can only deploy one wire material, when other wire materials need to be replaced, the user needs to manually replace them, which is low in efficiency and troublesome in the replacement process. The structure that the channel assembly 20 of the feeding mechanism 100 in the embodiment of the present application has at least two first channels 21a and second channels 22a, which can simultaneously accommodate at least two or more wire materials of the same or different materials, colors, etc. The printer can directly select and drive one of the wire materials to move according to the requirement, and the quick switching of different wire materials helps to improve the printing efficiency.

[0033] In some embodiments, referring to Figure 1 one of the first channels 21a is defined as a first channel 211, and the other first channel 21a is defined as a second channel 212. One of the second channels 22a is defined as a third channel 221, and the other second channel 22a is defined as a fourth channel 222. The first channel 211 and the third channel 221 are correspondingly arranged for threading the first wire material, and the second channel 212 and the fourth channel 222 are correspondingly arranged for threading the second wire material. The wire feeding assembly 30 is arranged between the first channel 211 and the third channel 221, and the first wire material sequentially passes through the first channel 211, the wire feeding assembly 30, and the third channel 221, and then passes into the heating mechanism. The wire feeding assembly 30 is arranged between the second channel 212 and the fourth channel 222, and the second wire material sequentially passes through the second channel 212, the wire feeding assembly 30, and the fourth channel 222, and then passes into the heating mechanism. Through the above structure, the first wire material and the second wire material each have an independent channel and do not affect each other.

[0034] In some embodiments, referring to Figure 1 and Figure 2 The wire feeding assembly 30 includes a driving component 31, a selecting component 32, a first clamping component 33, and a second clamping component 34. The driving component 31 is arranged in the housing 10, the first clamping component 33 and the second clamping component 34 are both rotationally arranged in the housing 10 and are respectively located on both sides of the driving component 31. The selecting component 32 is rotatable relative to the housing 10, the selecting component 32 is in abutting connection with the first clamping component 33 and the second clamping component 34, and in the process of rotating the selecting component 32 relative to the housing 10, the selecting component 32 can drive the first clamping component 33 to move away from or close to the driving component 31, thereby loosening or clamping the first wire material; and / or, the selecting component 32 can drive the second clamping component 34 to move away from or close to the driving component 31, thereby loosening or clamping the second wire material.

[0035] Specifically, the first clamping component 33 and the driving component 31 are spaced apart to have a first gap, and the first wire passes through the first gap. When the selection component 32 drives the first clamping component 33 to approach the driving component 31, the first clamping component 33 clamps the first wire together with the driving component 31, and pushes the first wire to move along with the rotation of the driving component 31. When the selection component 32 drives the first clamping component 33 to move away from the driving component 31, the first clamping component 33 releases the first wire from the driving component 31, and the first wire will not be pushed to move even if the driving component 31 rotates relative to the housing 10. The second clamping component 34 and the driving component 31 are spaced apart to have a second gap, and the second wire passes through the second gap. When the selection component 32 drives the second clamping component 34 to approach the driving component 31, the second clamping component 34 clamps the second wire together with the driving component 31, and pushes the second wire to move along with the rotation of the driving component 31. When the selection component 32 drives the second clamping component 34 to move away from the driving component 31, the second clamping component 34 releases the second wire from the driving component 31, and the second wire will not be pushed to move even if the driving component 31 rotates relative to the housing 10. It is worth mentioning that, during the rotation of the selection component 32, when the first clamping component 33 is driven to approach the driving component 31 to clamp the first wire, the second clamping component 34 is in a state of moving away from the driving component 31; and when the second clamping component 34 is driven to approach the driving component 31 to clamp the second wire, the first clamping component 33 is in a state of moving away from the driving component 31.

[0036] In some embodiments, referring to Figures 3 to 4 , the driving component 31 comprises a driving wheel 311, which is rotationally arranged in the housing 10. The selection component 32 comprises a transmission shaft 321 and a first eccentric wheel 322, the first eccentric wheel 322 is fixed to the transmission shaft 321 and rotates synchronously with the transmission shaft 321. The transmission shaft 321 is rotatable relative to the housing 10 to drive the first eccentric wheel 322 to rotate.

[0037] The first clamping component 33 comprises a first rotating shaft 331, a first clamping arm 332 and a first driven wheel 333. The first rotating shaft 331 is arranged in the housing 10, and the first clamping arm 332 is rotationally arranged on the first rotating shaft 331, so that the first clamping arm 332 is rotatable relative to the housing 10. The first driven wheel 333 is rotationally arranged on the first clamping arm 332, and the first driven wheel 333 has a first gap with the driving wheel 311. A part of the first clamping arm 332 abuts against the first eccentric wheel 322, so that the first eccentric wheel 322 drives the first driven wheel 333 to move away from or approach the driving wheel 311 during rotation.

[0038] The second clamping component 34 comprises a second rotating shaft 341, a second clamping arm 342 and a second passive wheel 343. The second rotating shaft 341 is arranged on the housing 10, and the second clamping arm 342 is rotatably arranged on the second rotating shaft 341, so that the second clamping arm 342 can rotate relative to the housing 10. The second passive wheel 343 is rotatably arranged on the second clamping arm 342, and the second passive wheel 343 has a second gap with the driving wheel 311. A part of the second clamping arm 342 abuts against the first eccentric wheel 322, so that the first eccentric wheel 322 drives the second passive wheel 343 to move away from or close to the driving wheel 311 during rotation.

[0039] In some embodiments, the first eccentric wheel 322 has a first far-center point 3221 and a first near-center point 3222, which are arranged at intervals in the circumferential direction of the first eccentric wheel 322. A part of the first clamping arm 332 abuts against the circumferential surface of the first eccentric wheel 322, and switches between the first far-center point 3221 and the first near-center point 3222, so that the first passive wheel 333 moves away from or close to the driving wheel 311. A part of the second clamping arm 342 abuts against the circumferential surface of the first eccentric wheel 322, and switches between the first far-center point 3221 and the first near-center point 3222, so that the second passive wheel 343 moves away from or close to the driving wheel 311. When the first passive wheel 333 is close to the driving wheel 311, the second passive wheel 343 is away from the driving wheel 311; when the second passive wheel 343 is close to the driving wheel 311, the first passive wheel 333 is away from the driving wheel 311. Such a structure can make only one of the first wire and the second wire be clamped and pushed into the heating mechanism, achieving the purpose of selecting the wire.

[0040] In some embodiments, please refer to Figure 3 and Figure 4The first end of the first clamping arm 332 is in abutment with the first eccentric wheel 322, and the second end of the first clamping arm 332 is provided with a first passive wheel 333. The first rotating shaft 331 is arranged between the two ends of the first clamping arm 332. Specifically, when the transmission shaft 321 rotates to drive the first eccentric wheel 322 to rotate, the first end of the first clamping arm 332 moves from the first near focus point 3222 to the first far focus point 3221, and in this process, the first eccentric wheel 322 pushes the first end of the first clamping arm 332 away from the transmission shaft 321. Under the action of the first rotating shaft 331, the second end of the first clamping arm 332 drives the first passive wheel 333 to move towards the driving wheel 311, and the first gap is reduced until the first passive wheel 333 and the driving wheel 311 clamp the first wire material. Conversely, when the transmission shaft 321 rotates to drive the first eccentric wheel 322 to rotate, the first end of the first clamping arm 332 moves from the first far focus point 3221 to the first near focus point 3222, and in this process, the first end of the first clamping arm 332 is close to the transmission shaft 321. Under the action of the first rotating shaft 331, the second end of the first clamping arm 332 drives the first passive wheel 333 to move away from the driving wheel 311, and the first gap is increased until the first wire material is loosened.

[0041] The first end of the second clamping arm 342 is in abutment with the first eccentric wheel 322, and the second end of the second clamping arm 342 is provided with a second passive wheel 343. The second rotating shaft 341 is arranged between the two ends of the second clamping arm 342. Specifically, when the transmission shaft 321 rotates to drive the first eccentric wheel 322 to rotate, the first end of the second clamping arm 342 moves from the first near focus point 3222 to the first far focus point 3221, and in this process, the first eccentric wheel 322 pushes the first end of the second clamping arm 342 away from the transmission shaft 321. Under the action of the second rotating shaft 341, the second end of the second clamping arm 342 drives the second passive wheel 343 to move towards the driving wheel 311, and the second gap is reduced until the second passive wheel 343 and the driving wheel 311 clamp the second wire material. Conversely, when the transmission shaft 321 rotates to drive the first eccentric wheel 322 to rotate, the first end of the second clamping arm 342 moves from the first far focus point 3221 to the first near focus point 3222, and in this process, the first end of the second clamping arm 342 is close to the transmission shaft 321. Under the action of the second rotating shaft 341, the second end of the second clamping arm 342 drives the second passive wheel 343 to move away from the driving wheel 311, and the second gap is increased until the second wire material is loosened.

[0042] It can be understood that, in some examples, as Figure 3As shown, the first eccentric wheel 322 is a cam, meaning it has at least one first distal point 3221 and multiple first proximal points 3222, with the radial distances between the multiple first proximal points 3222 and the axis of the drive shaft 321 being equal. During the rotation of the first eccentric wheel 322, when the first end of the first clamping arm 332 switches between the first distal point 3221 and the first proximal point 3222, the first end of the second clamping arm 342 moves between the multiple first proximal points 3222; when the first end of the second clamping arm 342 switches between the first distal point 3221 and the first proximal point 3222, the first end of the first clamping arm 332 moves between the multiple first proximal points 3222.

[0043] In other examples, such as Figure 5 As shown, the first eccentric wheel 322 is a concave wheel, meaning it has multiple first distal points 3221 and at least one first proximal point 3222. The radial distances between the multiple first distal points 3221 and the axis of the transmission shaft 321 are equal. During the rotation of the first eccentric wheel 322, when the first end of the first clamping arm 332 switches between the first distal point 3221 and the first proximal point 3222, the first end of the second clamping arm 342 moves between the multiple first distal points 3221; when the first end of the second clamping arm 342 switches between the first distal point 3221 and the first proximal point 3222, the first end of the first clamping arm 332 moves between the multiple first distal points 3221.

[0044] In some embodiments, please refer to Figure 5 and Figure 6 The first end of the first clamping arm 332 abuts against the first eccentric wheel 322, and the second end of the first clamping arm 332 is rotatably connected to the first rotating shaft 331. The first driven wheel 333 is disposed between the two ends of the first clamping arm 332. Specifically, when the drive shaft 321 rotates and drives the first eccentric wheel 322 to rotate, during the process of the first end of the first clamping arm 332 moving from the first proximal point 3222 to the first distal point 3221, the first eccentric wheel 322 pushes the first end of the first clamping arm 332 away from the drive shaft 321. Under the action of the first rotating shaft 331, the first clamping arm 332 drives the first driven wheel 333 away from the driving wheel 311, and the first gap increases until the first wire is released. Conversely, when the drive shaft 321 rotates and drives the first eccentric wheel 322 to rotate, during the process of the first end of the first clamping arm 332 moving from the first distal point 3221 to the first proximal point 3222, the first end of the first clamping arm 332 approaches the drive shaft 321. Under the action of the first rotating shaft 331, the first clamping arm 332 drives the first passive wheel 333 to approach the driving wheel 311, and the first gap decreases until the first passive wheel 333 and the driving wheel 311 clamp the first wire material.

[0045] The first end of the second clamping arm 342 is in abutment with the first eccentric wheel 322, and the second end of the second clamping arm 342 is rotationally connected with the second rotating shaft 341. The second passive wheel 343 is arranged between the two ends of the second clamping arm 342. Specifically, when the transmission shaft 321 rotates to drive the first eccentric wheel 322 to rotate, in the process that the first end of the second clamping arm 342 moves from the first near focus point 3222 to the first far focus point 3221, the first eccentric wheel 322 pushes the first end of the second clamping arm 342 away from the transmission shaft 321. Under the action of the second rotating shaft 341, the second clamping arm 342 drives the second passive wheel 343 to move away from the driving wheel 311, and the second gap is increased until the second thread is loosened. Conversely, when the transmission shaft 321 rotates to drive the first eccentric wheel 322 to rotate, in the process that the first end of the second clamping arm 342 moves from the first far focus point 3221 to the first near focus point 3222, the first end of the second clamping arm 342 approaches the transmission shaft 321. Under the action of the second rotating shaft 341, the second clamping arm 342 drives the second passive wheel 343 to approach the driving wheel 311, and the second gap is reduced until the second passive wheel 343 and the driving wheel 311 clamp the second thread.

[0046] In some embodiments, referring to Figure 4 and Figure 6 , the first clamping component 33 further comprises a first elastic member 334 connected with the first clamping arm 332 and the housing 10 respectively. The first elastic member 334 is used to provide an acting force to the first clamping arm 332 to drive the first end of the first clamping arm 332 to keep in abutment with the first eccentric wheel 322, so that the first end of the first clamping arm 332 can be switched between the first far focus point 3221 and the first near focus point 3222 of the first eccentric wheel 322. And when the first end of the first clamping arm 332 is located at the first near focus point 3222 of the first eccentric wheel 322, the first passive wheel 333 keeps away from the driving wheel 311 under the elastic force of the first elastic member 334 to loosen the first thread.

[0047] In some embodiments, the second clamping component 34 further comprises a second elastic member 344 connected with the second clamping arm 342 and the housing 10 respectively. The second elastic member 344 provides an acting force to the second clamping arm 342 to drive the first end of the second clamping arm 342 to keep in abutment with the first eccentric wheel 322, so that the first end of the second clamping arm 342 can be switched between the first far focus point 3221 and the first near focus point 3222 of the first eccentric wheel 322. And when the first end of the second clamping arm 342 is located at the first near focus point 3222 of the first eccentric wheel 322, the second passive wheel 343 keeps away from the driving wheel 311 under the elastic force of the second elastic member 344 to loosen the second thread.

[0048] As an embodiment, the first elastic member 334 is a first torsion spring, which comprises a first body part, a first torsion arm and a second torsion arm. The first body part is sleeved on the first rotating shaft 331. The first torsion arm is fixed with the first clamping arm 332. The second torsion arm is fixed with the shell 10. The second elastic member 344 is a second torsion spring, which comprises a second body part, a third torsion arm and a fourth torsion arm. The second body part is sleeved on the second rotating shaft 341. The third torsion arm is fixed with the second clamping arm 342. The fourth torsion arm is fixed with the shell 10.

[0049] In some embodiments, referring to Figure 5 , the wire feeding assembly 30 further comprises a zero resetting part 35, which is connected with the selecting part 32 and is used for detecting whether the selecting part 32 is in the zero position. When the selecting part 32 is in the zero position, the first passive wheel 333 and the second passive wheel 343 are both away from the driving wheel 311. The channel assembly 20 is provided with at least two first channels 21a and second channels 22a for the same or different wires to pass through. The selecting part 32 can select the wire in the different channel to push. In order to select the wire in the corresponding channel more accurately and quickly, the zero resetting part 35 is provided in the present application. By connecting the zero resetting part 35 with the selecting part 32, the selecting part 32 can be restored to the zero position first, so that the corresponding wire can be selected and pushed by rotating the zero position by a corresponding angle, thereby improving the selection accuracy.

[0050] As an example, when the selecting part 32 is in the zero position, the rotating angle of the transmission shaft 321 is 0°. When the first passive wheel 333 needs to be driven to approach the driving wheel 311 to clamp the first wire, the transmission shaft 321 is directly controlled to rotate by 90°. When the second passive wheel 343 needs to be driven to approach the driving wheel 311 to clamp the second wire, the transmission shaft 321 is directly controlled to rotate by 270°. By adding the zero resetting part 35, the rotating angle of the transmission shaft 321 can be directly quantified when the user selects to drive the first wire and the second wire, thereby improving the selection accuracy and selection efficiency.

[0051] In some embodiments, referring to Figure 7 and Figure 8 , the zero resetting part 35 comprises a zero position detection disc 351 and a photoelectric detector 352. The zero position detection disc 351 is fixed on the transmission shaft 321 and is provided with a zero position gap 3511. The photoelectric detector 352 is used for detecting the zero position gap 3511. The transmission shaft 321 can drive the zero position detection disc 351 to rotate. When the zero position gap 3511 rotates to the photoelectric detector 352, the zero position gap 3511 has the function of passing through the light signal. The receiving end of the photoelectric detector 352 can receive the light signal emitted by the emitting end. The photoelectric detector 352 is triggered to confirm that the current position of the transmission shaft 321 is the zero position.

[0052] In other embodiments, the zero position detection disc 351 is provided with a zero position protrusion, and the photoelectric detector 352 is arranged in the housing 10, and the photoelectric detector 352 is used to detect the zero position protrusion. When the zero position protrusion rotates to the photoelectric detector 352, the zero position protrusion has the function of blocking the light signal, and the receiving end of the photoelectric detector 352 cannot receive the light signal emitted by the transmitting end, and the photoelectric detector 352 is triggered to confirm that the current position of the transmission shaft 321 is the zero position.

[0053] Alternatively, in other embodiments, the zero reset part 35 includes a trigger part and a sensor, the trigger part is arranged on the transmission shaft, and the sensor is arranged on the housing. When the sensor and the trigger part are in electrical contact or mechanical contact, it can be confirmed that the current position of the transmission shaft 321 is the zero position.

[0054] In some embodiments, referring to Figure 1 and Figure 2 , the first channel 21a includes a fifth channel 213 and a sixth channel 214, and the second channel 22a includes a seventh channel 223 and an eighth channel 224. The fifth channel 213 and the seventh channel 223 are correspondingly arranged for threading the third wire material, and the sixth channel 214 and the eighth channel 224 are correspondingly arranged for threading the fourth wire material. The wire feeding assembly 30 further includes a third clamping part 36 and a fourth clamping part 37. The third clamping part 33 and the fourth clamping part 34 are rotatably arranged on the housing 10 and are respectively located on both sides of the driving part 31. The selection part 32 further includes a second eccentric wheel 323, and the second eccentric wheel 323 is fixed on the transmission shaft 321. Along the axial direction of the transmission shaft 321, the first eccentric wheel 322 and the second eccentric wheel 323 are adjacent or spaced apart, and in the circumferential direction of the transmission shaft 321, the first eccentric wheel 322 and the second eccentric wheel 323 are arranged in a staggered manner. The third clamping part 36 and the fourth clamping part 37 are in abutment with the second eccentric wheel 323.

[0055] The selection part 32 drives the third clamping part 36 to move through the second eccentric wheel 323, so that the third clamping part 36 moves away from or approaches the driving part 31, so as to loosen or jointly clamp the third wire material; and / or, the selection part 32 drives the fourth clamping part 37 to move through the second eccentric wheel 323, so that the fourth clamping part 37 moves away from or approaches the driving part 31, so as to loosen or jointly clamp the fourth wire material. By further increasing the number of first channels 21a and the number of second channels 22a, the channel assembly 20 can accommodate more wire materials at the same time, so as to increase the selectable wire materials and reduce the frequency of replacing the wire materials of the printer.

[0056] As an example, the first eccentric wheel 322 and the second eccentric wheel 323 are both cams, or both are concave wheels. The second eccentric wheel 323 has a second far-center point and a second near-center point, wherein a first connecting line between the first far-center point of the first eccentric wheel 322 and the axis of the transmission shaft 321 is a first connecting line, a second connecting line between the first far-center point of the second eccentric wheel 323 and the axis of the transmission shaft 321 is a second connecting line, and an included angle between the first connecting line and the second connecting line exists. The third clamping component 36 comprises a third passive wheel 361, and the fourth clamping component 37 comprises a fourth passive wheel 371. The third passive wheel 361 and the fourth passive wheel 371 are both arranged to be spaced apart from the driving wheel 311. When the transmission shaft 321 is in a zero position, the first passive wheel 333, the second passive wheel 343, the third passive wheel 361 and the fourth passive wheel 371 are all away from the driving wheel 311. When the transmission shaft 321 is rotated by a first preset angle clockwise from the zero position, so that the first passive wheel 333 approaches the driving wheel 311 to clamp the first wire material, the second passive wheel 343, the third passive wheel 361 and the fourth passive wheel 371 are all away from the driving wheel 311. When the transmission shaft 321 is rotated by a second preset angle clockwise from the zero position, so that the second passive wheel 343 approaches the driving wheel 311 to clamp the second wire material, the first passive wheel 333, the third passive wheel 361 and the fourth passive wheel 371 are all away from the driving wheel 311. When the transmission shaft 321 is rotated by a third preset angle clockwise from the zero position, so that the third passive wheel 361 approaches the driving wheel 311 to clamp the third wire material, the first passive wheel 333, the second passive wheel 343 and the fourth passive wheel 371 are all away from the driving wheel 311. When the transmission shaft 321 is rotated by a fourth preset angle clockwise from the zero position, so that the fourth passive wheel 371 approaches the driving wheel 311 to clamp the fourth wire material, the first passive wheel 333, the second passive wheel 343 and the third passive wheel 361 are all away from the driving wheel 311.

[0057] It is worth noting that the structure and connection relationship of the third clamping component 36 and the fourth clamping component 37 in the embodiment are similar to the structure and connection relationship of the first clamping component 33 and the second clamping component 34, and specific reference can be made to the above embodiment.

[0058] The application further provides a 3D printer, which comprises the feeding mechanism 100 described above. For the specific structure and functions of the 3D printer, reference can be made to the above embodiment.

[0059] The feeding mechanism 100 of the embodiment of the present application comprises a housing 10, a channel assembly 20 and a wire feeding assembly 30. The housing 10 is provided with a mounting cavity 11. The channel assembly 20 is arranged in the mounting cavity 11, and the channel assembly 20 comprises a first part 21 and a second part 22. The first part 21 is provided with at least two first channels 21a, and the second part 22 is provided with at least two second channels 22a. One first channel 21a and one second channel 22a are arranged correspondingly, and the first channel 21a and the second channel 22a are both used for passing wire material. The wire feeding assembly 30 is arranged between the first part 21 and the second part 22, and the wire feeding assembly 30 is used for selecting and driving the wire material in one of the first channels 21a to move. Compared with the structure in the prior art which needs to be manually replaced by the user, the structure of the channel assembly 20 of the feeding mechanism 100 of the embodiment of the present application has at least two first channels 21a and second channels 22a, which can simultaneously accommodate at least two or more wire materials of the same or different materials, colors and the like, can directly select and drive the wire material in one of the first channels 21a to move according to the requirement, and the rapid switching of the wire material helps to improve the printing efficiency.

[0060] The above is only the embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A feed mechanism characterized in that, The application relates to a feeding mechanism. The feeding mechanism comprises a housing provided with a mounting cavity; a channel assembly arranged in the mounting cavity, the channel assembly comprising a first part and a second part, the first part being provided with at least two first channels, the second part being provided with at least two second channels, the first channels and the second channels being used for passing a wire material; and a wire feeding assembly arranged between the first part and the second part, the wire feeding assembly being used for driving the wire material to move.

2. The feeding mechanism according to claim 1, wherein the first channels comprise a first channel and a second channel, the second channels comprise a third channel and a fourth channel, the first channel and the third channel are arranged correspondingly, and the second channel and the fourth channel are arranged correspondingly.

3. The feeding mechanism according to claim 2, wherein the wire feeding assembly comprises a driving part, a selecting part, a first clamping part and a second clamping part, the driving part is arranged in the housing, the first clamping part and the second clamping part are movably arranged in the housing and are respectively located on two sides of the driving part; the selecting part drives the first clamping part to move away from or close to the driving part; and / or the selecting part drives the second clamping part to move away from or close to the driving part.

4. The feeding mechanism according to claim 3, wherein the driving part comprises a driving wheel; the selecting part comprises a transmission shaft and a first eccentric wheel, the first eccentric wheel is fixed to the transmission shaft; the first clamping part comprises a first rotating shaft, a first clamping arm and a first driven wheel, the first rotating shaft is arranged in the housing, the first clamping arm is rotatably arranged on the first rotating shaft, the first driven wheel is rotatably arranged on the first clamping arm, the first clamping arm abuts against the first eccentric wheel, and the first driven wheel can move away from or close to the driving wheel; and the second clamping part comprises a second rotating shaft, a second clamping arm and a second driven wheel, the second rotating shaft is arranged in the housing, the second clamping arm is rotatably arranged on the second rotating shaft, the second driven wheel is rotatably arranged on the second clamping arm, the second clamping arm abuts against the first eccentric wheel, and the second driven wheel can move away from or close to the driving wheel.

5. The feeding mechanism according to claim 4, wherein the first eccentric wheel has a first far-center point and a first near-center point; the first clamping arm abuts against the first eccentric wheel and switches between the first far-center point and the first near-center point, so that the first driven wheel moves away from or close to the driving wheel; the second clamping arm abuts against the first eccentric wheel and switches between the first far-center point and the first near-center point, so that the second driven wheel moves away from or close to the driving wheel; when the first driven wheel is close to the driving wheel, the second driven wheel moves away from the driving wheel; and when the second driven wheel is close to the driving wheel, the first driven wheel moves away from the driving wheel.

6. The feeding mechanism according to claim 5, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first end of the first clamping arm is in abutment with the first eccentric wheel, the second end of the first clamping arm is provided with the first passive wheel, and the first rotating shaft is arranged between the two ends of the first clamping arm; The first end of the second clamping arm is in abutment with the first eccentric wheel, the second end of the second clamping arm is provided with the second passive wheel, and the second rotating shaft is arranged between the two ends of the second clamping arm; Alternatively, The first end of the first clamping arm is in abutment with the first eccentric wheel, the second end of the first clamping arm is in rotational connection with the first rotating shaft, and the first passive wheel is arranged between the two ends of the first clamping arm; The first end of the second clamping arm is in abutment with the first eccentric wheel, the second end of the second clamping arm is in rotational connection with the second rotating shaft, and the second passive wheel is arranged between the two ends of the second clamping arm.

7. The feeding mechanism according to claim 4, wherein The first clamping component further comprises a first elastic member, the first elastic member is a first torsion spring, the first torsion spring comprises a first main body part, a first torsion arm and a second torsion arm, the first main body part is sleeved on the first rotating shaft, the first torsion arm is fixed with the first clamping arm, the second torsion arm is fixed with the housing, and the first elastic member drives the first clamping arm to keep in abutment with the first eccentric wheel; The second clamping component further comprises a second elastic member, the second elastic member is a second torsion spring, the second torsion spring comprises a second main body part, a third torsion arm and a fourth torsion arm, the second main body part is sleeved on the second rotating shaft, the third torsion arm is fixed with the second clamping arm, the fourth torsion arm is fixed with the housing, and the second elastic member drives the second clamping arm to keep in abutment with the first eccentric wheel.

8. The feeding mechanism according to claim 4, wherein The wire feeding assembly further comprises a zero resetting component, the zero resetting component is connected with the selecting component, the zero resetting component is used for detecting whether the selecting component is in a zero position, when the selecting component is in the zero position, the first passive wheel and the second passive wheel are away from the driving wheel; The zero resetting component comprises a zero position detection disc and a photoelectric detector, the zero position detection disc is fixed on the transmission shaft, the zero position detection disc is provided with a zero position gap, the photoelectric detector is arranged on the housing, and the photoelectric detector is used for detecting the zero position gap; or, the zero position detection disc is provided with a zero position convex part, the photoelectric detector is arranged on the housing, and the photoelectric detector is used for detecting the zero position convex part; Alternatively, the zero resetting component comprises a trigger part and a sensor, the trigger part is arranged on the transmission shaft, and the sensor is arranged on the housing, and the sensor is in electrical contact or mechanical contact with the trigger part.

9. The feeding mechanism according to claim 4, wherein The first channel comprises a fifth channel and a sixth channel, the second channel comprises a seventh channel and an eighth channel, the fifth channel and the seventh channel are correspondingly arranged, and the sixth channel and the eighth channel are correspondingly arranged. The wire feeding assembly further comprises a third clamping component and a fourth clamping component, which are movably arranged on the housing and located on both sides of the driving component respectively; The selection component further comprises a second eccentric wheel, which is fixed on the transmission shaft, the first eccentric wheel and the second eccentric wheel are adjacent or spaced in the axial direction of the transmission shaft, and in the circumferential direction of the transmission shaft, the first eccentric wheel and the second eccentric wheel are arranged in a staggered manner, and the third clamping component and the fourth clamping component are in contact with the second eccentric wheel; The selection component drives the third clamping component to move away from or close to the driving component through the second eccentric wheel; and / or, the selection component drives the fourth clamping component to move away from or close to the driving component through the second eccentric wheel.

10. A 3D printer characterized by, A feeding mechanism comprising any one of claims 1-9.

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