CN209813091U - Switching feeding mechanism of double-flow-channel printing head - Google Patents
Switching feeding mechanism of double-flow-channel printing head Download PDFInfo
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- CN209813091U CN209813091U CN201920384677.8U CN201920384677U CN209813091U CN 209813091 U CN209813091 U CN 209813091U CN 201920384677 U CN201920384677 U CN 201920384677U CN 209813091 U CN209813091 U CN 209813091U
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Abstract
The utility model discloses a switching feeding mechanism of a double-runner printing head, which comprises a base, a motor, a driving feeding wheel, a reversing wheel train, a feeding driven wheel component, a swing shaft, a left melt extrusion runner and a right melt extrusion runner; the motor is installed at the base middle part, and initiative feeding wheel and switching-over train are installed in proper order on motor shaft, and the balance staff is installed on the base, and is located motor shaft top, and pay-off from the driving wheel subassembly rotation install on the balance staff, and with switching-over train swing joint, the runner is extruded in left melting and right melting is extruded the runner symmetry and is installed on the base, and respectively with the silk material feeding direction center of initiative feeding wheel both sides on same vertical line. The utility model discloses only can be in step by a motor for feeding mechanism's switching and the feeding of silk material provide drive power, greatly reduced whole printing system's weight and control complexity.
Description
Technical Field
The utility model relates to a 3D printer based on quick forming technology is piled up in melting, concretely relates to double fluid channel beats switching feeding mechanism of printer head.
Background
The 3D printer based on the melt accumulation rapid forming process is characterized in that a printing head is controlled by a computer to melt and extrude plastic filaments into filaments of about 0.1-0.4 mm, and the filaments are printed and accumulated layer by layer to form a three-dimensional entity. Typically, the fused deposition rapid prototyping process requires the addition of support in the manufacture of articles having a cantilever structure. If the printing head of the 3D printer only has a single melting flow channel design structure, the printed object and the support can only be constructed by the same material. Although the supporting part can be loosened to achieve the purpose of facilitating the peeling by controlling the operation mode of the printing head in the printing process, the same material is used, so that the peeling is difficult to be identified at the boundary of the object and the support after the printing is finished, and the fine structure of the object is easy to damage when the support is peeled. In order to solve the problem, at present, a 3D printer printing head based on a melt deposition rapid prototyping process mostly adopts a double-flow-channel structure, wherein one flow channel is used for melt extrusion of a model forming material such as ABS plastic, and the other flow channel is used for melt extrusion of a supporting material which can be easily physically or chemically stripped, and the formed model is not damaged during stripping; when which kind of material needs to be extruded in the printing process, the system control switching mechanism switches the corresponding feeding mechanism of the melting flow channel to the working state, so that the alternate extrusion of the two melting flow channels is realized. The double-channel printing head switching mode of the disclosed 3D printer can be divided into two types:
one type is that two melting flow passages are respectively driven by two motors to feed materials, and when the flow passages need to be switched, a system controls the corresponding feeding motors to rotate, so that the feeding and extrusion of corresponding materials are realized. The feeding switching of the double-channel printing head needs two sets of motors and driving elements, and the complexity of a control system is increased.
The other type of the device relies on a feeding motor and a set of complex mechanical mechanism, and realizes feeding switching by external force. The complex mechanical structure is driven by external force to realize the switching of the working states of the two melting flow channels corresponding to the feeding mechanism, and the feeding and the extrusion of corresponding materials are realized by matching with the change of the rotating direction of the feeding motor. The switching mode has a complex structure, increases the volume and the weight of the printing head, and greatly restricts the improvement of the printing speed.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, the utility model provides a double-flow-passage beats switching feeding mechanism of printer head only can be in step by a motor for feeding mechanism's switching and the feeding of silk material provide drive power, greatly reduced whole printing system's weight and control complexity.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a switching feeding mechanism of a double-flow-channel printing head comprises a base, a motor, a driving feeding wheel, a reversing wheel train, a feeding driven wheel component, a swing shaft, a left melt extrusion flow channel and a right melt extrusion flow channel; the motor is arranged in the middle of the base, the driving feeding wheel and the reversing wheel train are sequentially arranged on a motor rotating shaft, the swing shaft is arranged on the base and is positioned above the motor rotating shaft, the left melt extrusion flow channel and the right melt extrusion flow channel are symmetrically arranged on the base and are respectively positioned on the same vertical line with the centers of the feeding directions of the wires on the two sides of the driving feeding wheel; the reversing gear train comprises a sun gear, a plurality of planet gears, a planet carrier and a gear ring, wherein the planet gears are uniformly distributed around the sun gear; pay-off includes shift fork, left driven feeding wheel and right driven feeding wheel from the driving wheel subassembly, and the shift fork is the font of falling V, and the middle part rotates to be installed on the balance staff, and left driven feeding wheel and right driven feeding wheel rotate respectively and install at the shift fork both ends, and shift fork middle part below is equipped with the tooth platform with tooth's socket meshing.
As an improvement of the utility model, the driven feeding wheel in a left side and the driven feeding wheel in the right side on all be equipped with the V type recess that is used for restraint, direction silk material.
As the utility model discloses an improve, still include left guide cover and right guide cover, the runner is extruded with left melting to the lower extreme of left guide cover and is connected, and the left silk material direction of feed of the directional initiative delivery wheel in upper end is extruded to the lower extreme of right guide cover and right melting and is connected, and the silk material direction of feed on the directional initiative delivery wheel right side in upper end is fed.
Compared with the prior art, the utility model has the advantages of as follows:
the whole double-flow-channel printing head can synchronously provide driving force for switching of the feeding mechanism and feeding of the wires only by one motor, so that the accuracy and reliability of active wire switching are guaranteed, the weight and control complexity of the whole printing system are reduced, and the printing speed is improved.
Secondly, a simple and reliable independent switching feeding structure is designed. Through the conversion of the rotation direction of the motor, the reversing wheel train is driven to rotate in the corresponding direction, and then the synchronous switching of the working state of the corresponding wire feeding mechanism is completed. The whole structure is simple and compact, and the switching process can be automatically completed without any external force. Meanwhile, the reversing wheel system adopts a structure that a pinion drives a bull gear, and the requirement of driving force can be met only by selecting a motor with a smaller specification model.
All gears of the switching feeding mechanism are meshed with each other all the time, and sliding gears are not needed in the switching process, so that friction wear and impact vibration are small, and the long service life is ensured. Meanwhile, the gear parts are all standard parts, design and processing are not needed, and maintenance and replacement are easy;
drawings
FIG. 1 is an isometric view of the overall construction of a switching feed mechanism;
FIG. 2 is an exploded view of the switching feed mechanism;
FIG. 3 is a side cross-sectional view of the switching feed mechanism;
FIG. 4 is a diagram showing the relationship between the rotational directions of the reversing gear train;
FIG. 5 is a diagram showing the relationship between the direction of rotation of the reversing wheel train and the feed driven wheel assembly
FIG. 6 is a front view of the right melt extrusion runner in operation;
FIG. 7 is a front view of the left melt extrusion runner in operation;
description of reference numerals: 1-a base; 2, a motor; 3-driving feeding wheel; 4-a reversing wheel train; 5-feeding a driven wheel assembly; 6-a pendulum shaft; 7-a clamp spring; 8L-left melt extrusion runner; 8R-right melt extrusion runner; 9L-a left material guide sleeve; 9R-a right material guide sleeve; 10L-left silk; 10R-right wire; 401-sun gear, 402-planet gear, 403-rolling bearing, 404-planet carrier, 405-gear ring; 4051-gullet; 501-a shifting fork; 502L-left driven wheel shaft; 502R-right driven wheel shaft; 503L-left driven feed wheel; 503R-right driven feed wheel; 5011-dental table.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and fig. 2, the switching feeding mechanism of the dual-channel printing head of the present embodiment includes a base 1, a motor 2, a driving feeding wheel 3, a reversing wheel train 4, a feeding driven wheel assembly 5, a swing shaft 6, a left melt extrusion channel 8L, a right melt extrusion channel 8R, a left material guiding sleeve 9L, and a right material guiding sleeve 9R.
The motor 2 is arranged on the back surface of the base 1, and a rotating shaft of the motor extends to the front surface of the base 1; the reversing wheel train 4 and the driving feeding wheel 3 are sequentially and fixedly arranged on a rotating shaft of the motor 2; the swing shaft 6 is fixedly arranged on the base 1 and is positioned right above the rotating shaft of the motor 2, and the axes of the swing shaft and the rotating shaft are aligned; the feeding driven wheel component 5 is rotatably installed on the swinging shaft 6 and then limited by the shaft end of the clamp spring 7, and the middle part of the feeding driven wheel component is movably connected with the reversing wheel train 4; the left melt extrusion flow channel 8L and the right melt extrusion flow channel 8R are symmetrically arranged and fixed on the base 1; the lower end of the left material guide sleeve 9L is fixedly connected with the left melt extrusion flow channel 8L in a threaded manner, the upper end points to the feeding direction of the wires on the left side of the driving feeding wheel 3, and the centers of the three parts are on the same vertical line; the lower end of the right material guide sleeve 9R is fixed with the right melt extrusion flow channel 8R in a threaded manner, the upper end points to the feeding direction of the wires on the right side of the driving feeding wheel 3, and the centers of the three are on the same vertical line. When the printing head needs to switch feeding, the motor 2 rotates in the opposite direction to drive the reversing wheel train 4 to switch the rotating direction, so that the feeding driven wheel assembly 5 is driven to swing in the opposite direction, and the feeding mechanism is switched autonomously. The whole printing head is simple and compact in structure and convenient to realize.
As shown in fig. 2 to 5, the reversing gear train 4 is mainly composed of a sun gear 401, a planetary gear 402, a rolling bearing 403, a carrier 404, and a gear ring 405. The sun gear 401 is fixedly installed on a rotating shaft of the motor 2, the planetary gears 402 with the centers embedded into the rolling bearings 403 are uniformly installed on the planet carrier 404 and are in external meshing connection with the sun gear 401, the gear ring 405 is installed on the outer ring of the uniformly distributed planetary gears 402 and is in internal meshing connection with the planetary gears 402, and the outer wall of the gear ring 405 is further provided with an axial tooth groove 4051.
The feeding driven wheel assembly 5 mainly comprises a shifting fork 501, a left driven wheel rotating shaft 502L, a right driven wheel rotating shaft 502R, a left driven feeding wheel 503L and a right driven feeding wheel 503R. The shifting fork 501 is inverted V-shaped, the middle part of the shifting fork is rotatably installed on a swing shaft 6 and then limited by the shaft end of a clamp spring 7, a left driven wheel rotating shaft 502L and a right driven wheel rotating shaft 502R are symmetrically installed and fixed at the left end and the right end of the shifting fork 501, a left driven feeding wheel 503L is rotatably installed on the left driven wheel rotating shaft 502L, a right driven feeding wheel 503R is rotatably installed on the right driven wheel rotating shaft 502R, and a tooth table 5011 meshed with a tooth groove 4051 is arranged below the middle part of the shifting fork 501, so that the shifting fork can swing along with the.
When the motor 2 drives the sun gear 401 to rotate in one direction, the sun gear 401 drives the planet gear 402 to rotate in the opposite direction, the planet gear 402 drives the gear ring 405 to rotate in the same direction, and the rotation of the gear ring 405 drives the feeding driven wheel component 5 to swing in the opposite direction around the swing shaft 6.
In summary, when the motor 2 drives the driving feeding wheel 3 and the sun gear 401 to rotate in one direction, the gear ring 405 will also drive the feeding driven wheel assembly 5 to rotate in the same direction.
As shown in fig. 6, when the right melt extrusion channel 8R needs to be switched to the working state, the motor 2 rotates clockwise to drive the driving feeding wheel 3 and the sun gear 401 to rotate clockwise, the sun gear 401 drives the planetary gear 402 to rotate counterclockwise, the planetary gear 402 drives the gear ring 405 to rotate counterclockwise in the same direction, and the rotation of the gear ring 405 drives the feeding driven wheel assembly 5 to swing clockwise around the swing shaft 6. When the feeding driven wheel component 5 swings clockwise to the right driven feeding wheel 503R to press the wires 10R, the feeding driving wheel component 5 stops swinging, and the right driven feeding wheel 503R and the driving feeding wheel 3 together convey the wires 10R to the right guide sleeve 9R below and then enter the right melt extrusion flow channel 8R for melt extrusion. And because the feeding driven wheel component 5 stops swinging, the gear ring 405 movably connected with the feeding driven wheel component stops rotating, at the moment, the planetary gear 402 performs anticlockwise rotation motion along the axis of the planetary gear 402 and clockwise revolution along the axis of the sun gear 401, and the planetary gear 402 generates continuous locking force on the gear ring 405 in the rotating process, so that the continuous pressing of the right driven feeding wheel 503R on the wire 10R in the extruding process is ensured. As long as the clockwise rotation direction of the motor 2 is not changed, the right melt extrusion channel 8R is always in a working state.
As shown in fig. 7, when the left melt extrusion channel 8L needs to be switched to the working state, the motor 2 rotates counterclockwise to drive the driving feeding wheel 3 and the sun gear 401 to rotate counterclockwise together, the sun gear 401 drives the planetary gear 402 to rotate clockwise, the planetary gear 402 drives the gear ring 405 to rotate clockwise in the same direction, and the rotation of the gear ring 405 drives the feeding driven wheel assembly 5 to swing counterclockwise around the swing shaft 6. When the feeding driven wheel assembly 5 swings anticlockwise to the left driven feeding wheel 503L to compress the wires 10L, the feeding driven wheel assembly 5 stops swinging, and the left driven feeding wheel 503L and the driving feeding wheel 3 jointly convey the wires 10L to the lower left guide sleeve 9L and then enter the left melt extrusion flow channel 8L for melt extrusion. And because the feeding driven wheel component 5 stops swinging, the gear ring 405 movably connected with the feeding driven wheel component stops rotating, at the moment, the planetary gear 402 performs clockwise rotation motion along the axis of the planetary gear 402 and anticlockwise revolution along the axis of the sun gear 401, and the planetary gear 402 generates continuous locking force on the gear ring 405 in the rotating process, so that the continuous pressing of the left driven feeding wheel 503L on the wire 10L in the extruding process is ensured. As long as the counterclockwise rotation direction of the motor 2 is not changed, the left melt-extrusion flow channel 8L is always in a working state.
It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like in the embodiments indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience in describing embodiments of the present invention and for simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included within the scope of the present invention.
Claims (3)
1. The utility model provides a double-flow-channel printing head's switching feeding mechanism which characterized in that: the device comprises a base (1), a motor (2), a driving feeding wheel (3), a reversing wheel train (4), a feeding driven wheel component (5), a swing shaft (6), a left melt extrusion flow channel (8L) and a right melt extrusion flow channel (8R); the motor (2) is arranged in the middle of the base (1), the driving feeding wheel (3) and the reversing wheel train (4) are sequentially arranged on a rotating shaft of the motor (2), the swing shaft (6) is arranged on the base (1) and is positioned above the rotating shaft of the motor (2), the left melting extrusion flow channel (8L) and the right melting extrusion flow channel (8R) are symmetrically arranged on the base (1) and are respectively positioned on the same vertical line with the feeding direction centers of wires on the two sides of the driving feeding wheel (3); the reversing gear train (4) comprises a sun gear (401), a plurality of planet gears (402) uniformly distributed around the sun gear (401), a planet carrier (404) and a gear ring (405), the sun gear (401) is fixedly installed on a rotating shaft of the motor (2), each planet gear (402) is rotatably installed on the planet carrier (404) and is in external meshing connection with the sun gear (401), the gear ring (405) is installed on the outer ring of the planet gear (402) and is in internal meshing connection with the planet gear (402), and the outer wall of the gear ring (405) is provided with an axial tooth socket (4051); the feeding driven wheel assembly (5) comprises a shifting fork (501), a left driven feeding wheel (503L) and a right driven feeding wheel (503R), the shifting fork (501) is inverted V-shaped, the middle part of the shifting fork is rotatably installed on a swing shaft (6), the left driven feeding wheel (503L) and the right driven feeding wheel (503R) are respectively rotatably installed at two ends of the shifting fork (501), and a tooth table (5011) meshed with a tooth groove (4051) is arranged below the middle part of the shifting fork (501).
2. The switching feed mechanism of a dual-flow printhead of claim 1, wherein: the left driven feeding wheel (503L) and the right driven feeding wheel (503R) are both provided with V-shaped grooves for restraining and guiding wires.
3. A switching feed mechanism for a dual-flow printhead according to claim 1 or 2, wherein: the wire feeding device is characterized by further comprising a left material guiding sleeve (9L) and a right material guiding sleeve (9R), wherein the lower end of the left material guiding sleeve (9L) is connected with a left melting extrusion flow channel (8L), the upper end of the left material guiding sleeve points to the wire feeding direction on the left side of the driving feeding wheel (3), the lower end of the right material guiding sleeve (9R) is connected with a right melting extrusion flow channel (8R), and the upper end of the right material guiding sleeve points to the wire feeding direction on the right side of the driving feeding wheel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384677.8U CN209813091U (en) | 2019-03-25 | 2019-03-25 | Switching feeding mechanism of double-flow-channel printing head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384677.8U CN209813091U (en) | 2019-03-25 | 2019-03-25 | Switching feeding mechanism of double-flow-channel printing head |
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| Publication Number | Publication Date |
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| CN209813091U true CN209813091U (en) | 2019-12-20 |
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| CN201920384677.8U Active CN209813091U (en) | 2019-03-25 | 2019-03-25 | Switching feeding mechanism of double-flow-channel printing head |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459506A (en) * | 2021-05-19 | 2021-10-01 | 西京学院 | Single-motor extrusion head for extruding double materials |
| CN113524664A (en) * | 2021-08-22 | 2021-10-22 | 蚌埠学院 | Automatic wire material replacing device for 3D printer and 3D printer |
| CN117841360A (en) * | 2024-01-12 | 2024-04-09 | 青岛英龙联合智造装备有限公司 | 3D printer with feeding switching structure and use method thereof |
-
2019
- 2019-03-25 CN CN201920384677.8U patent/CN209813091U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459506A (en) * | 2021-05-19 | 2021-10-01 | 西京学院 | Single-motor extrusion head for extruding double materials |
| CN113524664A (en) * | 2021-08-22 | 2021-10-22 | 蚌埠学院 | Automatic wire material replacing device for 3D printer and 3D printer |
| CN113524664B (en) * | 2021-08-22 | 2023-04-28 | 蚌埠学院 | Automatic wire replacing device for 3D printer and 3D printer thereof |
| CN117841360A (en) * | 2024-01-12 | 2024-04-09 | 青岛英龙联合智造装备有限公司 | 3D printer with feeding switching structure and use method thereof |
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