阅读说明：本技术 一种3d打印机及其挤丝装置 (3D printer and crowded silk device thereof ) 是由 杨金林 周萱艺 钟汉迪 阮智力 于 2020-12-22 设计创作，主要内容包括：本发明提供了一种3D打印及其挤丝装置,属于3D打印技术领域。本发明中的3D打印机中的挤丝装置,包括安装部件,和设于安装部件上的动力结构和挤压结构,动力结构包括驱动器,挤压结构包括相互配合的主动挤压轮和从动挤压轮,动力结构和挤压结构之间设有减速结构,减速结构分别与驱动器以及主动挤压轮直接或间接连接、以降低主动挤压轮的转速等。本3D打印机中及其挤丝装置的优点在于：通过设置减速结构,能够实现降低主动挤压轮的转速,以增加对被挤压的打印材料的挤压时间,有利于提高被挤出的打印丝的质量,另外增加了对从动挤压轮的压紧力进行调节的调节件的自由度、防止其弯曲变形。(The invention provides a 3D printing and wire extruding device thereof, and belongs to the technical field of 3D printing. The filament extruding device in the 3D printer comprises an installation part, and a power structure and an extruding structure which are arranged on the installation part, wherein the power structure comprises a driver, the extruding structure comprises a driving extruding wheel and a driven extruding wheel which are matched with each other, a speed reducing structure is arranged between the power structure and the extruding structure, and the speed reducing structure is directly or indirectly connected with the driver and the driving extruding wheel respectively so as to reduce the rotating speed of the driving extruding wheel. Among this 3D printer and crowded silk device's advantage lies in: through setting up speed reduction structure, can realize reducing the rotational speed of initiative extrusion wheel to increase the extrusion time to the printing material that is extruded, be favorable to improving the quality of the printing silk that is extruded, increased in addition and carried out the degree of freedom of the regulating part of adjusting to the packing force of driven extrusion wheel, prevent its bending deformation.)

1. The utility model provides a crowded silk device in 3D printer, includes the installing component, and locates power structure and extrusion structure on the installing component, power structure include the driver, extrusion structure including the initiative extrusion wheel and the driven extrusion wheel of mutually supporting, its characterized in that: the speed reduction structure is arranged between the power structure and the extrusion structure, and the speed reduction structure is directly or indirectly connected with the driver and the driving extrusion wheel respectively so as to reduce the rotating speed of the driving extrusion wheel.

2. The filament extruding device of the 3D printer according to claim 1, wherein the extruding structure further comprises a tension adjusting assembly for adjusting the pressing force of the driven extruding wheel on the extruded printing material, the tension adjusting assembly comprises an elastic member and a deformation adjusting member for adjusting the deformation of the elastic member, one end of the elastic member directly or indirectly interacts with the deformation adjusting member, the other end of the elastic member directly or indirectly interacts with the driven extruding wheel, and the elastic member directly or indirectly acts the elastic force generated by the deformation on the driven extruding wheel to adjust the pressing force of the driven extruding wheel on the extruded printing material.

3. The filament extruding apparatus of claim 2, wherein the elastic member is sleeved on the deformation adjusting member and moves on the deformation adjusting member when deforming.

4. The filament extruding device of claim 3, wherein the two ends of the deformation adjusting member are not fixed on the mounting member.

5. The filament extruding device of the 3D printer according to claim 4, wherein the mounting member provided with the driven extrusion wheel and the mounting member adjacent thereto are hinged, one end of the deformation adjusting member is movably disposed on the mounting member provided with the driven extrusion wheel, the elastic member is disposed at a position between the one end of the deformation adjusting member and the mounting member provided with the driven extrusion wheel and maintains a deformed state, and the driven extrusion wheel synchronously rotates with the mounting member provided with the driven extrusion wheel when the deformation adjusting member adjusts the deformation amount of the elastic member.

6. The filament extruding device of the 3D printer according to any one of claims 1 to 5, wherein the decelerating structure comprises a small wheel body and a large wheel body with a radius larger than that of the small wheel body, the small wheel body is engaged with the driver, the large wheel body is engaged with the rotating shaft to drive the large wheel body to rotate synchronously with the small wheel body, the driving extruding wheel is arranged on the rotating shaft and keeps rotating synchronously with the rotating shaft, and the small wheel body is directly or indirectly engaged with the large wheel body.

7. The filament extruding device of the 3D printer according to claim 6, wherein the small wheel body and the large wheel body are respectively provided with a tooth head at the radial periphery side, and the small wheel body and the large wheel body are meshed through the tooth heads respectively arranged on the small wheel body and the large wheel body.

8. The filament extruding device of the 3D printer according to claim 6, wherein a ring-shaped conveyer belt is arranged between the small wheel body and the large wheel body, the ring-shaped conveyer belt is respectively sleeved on the small wheel body and the large wheel body, and the small wheel body drives the large wheel body to rotate through the ring-shaped conveyer belt.

9. The filament extruding device of claim 8, wherein the ring-shaped conveyor belt is provided with teeth on a side thereof engaged with the small wheel body and the large wheel body and on respective radial peripheries of the small wheel body and the large wheel body, and the teeth on the ring-shaped conveyor belt are engaged with the teeth on the small wheel body and the large wheel body.

10. The utility model provides a 3D printer, includes crowded silk ware, its characterized in that: the filament extruder is the filament extruding device of any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printer and a filament extruding device thereof.

Background

With the rapid development of science and technology, more and more 3D printers step into the public vision. For a complete 3D printer, a filament extrusion device is one of the important components, which extrudes the printing material into a filament-like printing filament by means of a rotating extrusion wheel. Most of 3D printers on the market have the problems that when an extruding wheel extrudes printing materials, the extruded printing wires are not uniform and are easily crushed or broken due to the fact that the rotating speed of the extruding wheel is too high.

Disclosure of Invention

A first object of the present invention is to solve at least part of the above problems with a filament extrusion device in a 3D printer.

The second purpose of the invention is to provide a 3D printer of the wire extruding device.

In order to achieve the purpose, the invention adopts the following technical scheme: the invention discloses a filament extruding device in a 3D printer, which comprises a mounting part, and a power structure and an extruding structure which are arranged on the mounting part, wherein the power structure comprises a driver, and the extruding structure comprises a driving extruding wheel and a driven extruding wheel which are matched with each other, and is characterized in that: a speed reducing structure is arranged between the power structure and the extrusion structure, and the speed reducing structure is directly or indirectly connected with the driver and the driving extrusion wheel respectively so as to reduce the rotating speed of the driving extrusion wheel.

In the filament extruding device in the 3D printer, the extruding structure further includes a tightness adjusting assembly for adjusting the pressing force of the driven extruding wheel on the extruded printing material, the tightness adjusting assembly includes an elastic member and a deformation adjusting member for adjusting the deformation amount of the elastic member, one end of the elastic member directly or indirectly interacts with the deformation adjusting member, the other end of the elastic member directly or indirectly interacts with the driven extruding wheel, and the elastic member directly or indirectly acts the elastic force generated by the deformation on the driven extruding wheel to adjust the pressing force of the driven extruding wheel on the extruded printing material.

In the above-described filament extruding device in the 3D printer, the elastic member is fitted over the deformation adjusting member and moves on the deformation adjusting member when deformed.

In the above-described filament extruding device in the 3D printer, both ends of the deformation regulating member are not fixed to the mounting member.

In the filament extruding device in the 3D printer, the mounting part provided with the driven extrusion wheel is hinged, one end of the deformation adjusting member is movably disposed on the mounting part provided with the driven extrusion wheel, the elastic member is disposed between the one end of the deformation adjusting member and the mounting part provided with the driven extrusion wheel and maintains a deformation state, and the driven extrusion wheel synchronously rotates with the mounting part provided with the driven extrusion wheel when the deformation adjusting member adjusts the deformation amount of the elastic member.

In the filament extruding device in the 3D printer, the decelerating structure includes a small wheel body and a large wheel body having a radius larger than that of the small wheel body, the small wheel body is matched with the driver, the large wheel body is matched with the rotating shaft to drive the large wheel body to rotate synchronously with the large wheel body, the driving extrusion wheel is arranged on the rotating shaft and keeps rotating synchronously with the rotating shaft, and the small wheel body is directly or indirectly matched with the large wheel body.

In the thread extruding device in the 3D printer, the small wheel body and the large wheel body are respectively provided with a tooth head at the radial periphery side, and the small wheel body and the large wheel body are engaged with each other through the tooth heads.

In the filament extruding device in the 3D printer, a ring-shaped conveyer belt is arranged between the small wheel body and the large wheel body, the ring-shaped conveyer belt is respectively sleeved on the small wheel body and the large wheel body, and the small wheel body drives the large wheel body to rotate through the ring-shaped conveyer belt.

In the thread extruding device in the 3D printer, the ring-shaped conveying belt is provided with the tooth heads on one side matched with the small wheel body and the large wheel body and on the radial peripheral sides of the small wheel body and the large wheel body, and the tooth heads on the ring-shaped conveying belt are meshed with the tooth heads on the small wheel body and the large wheel body.

The 3D printer comprises the filament extruding device.

Compared with the prior art, this crowded silk device in 3D printer's advantage lies in:

1. by arranging the speed reducing structure, the rotating speed of the driving extrusion wheel can be reduced, so that the extrusion time of the extruded printing material is prolonged, and the quality of the extruded printing wire is improved;

2. the elastic element is sleeved on the deformation adjusting element, so that the direction of the elastic force generated by the elastic element during deformation is consistent with the sleeving direction of the elastic element (namely the setting direction of the deformation adjusting element), and the phenomenon that the elastic force generated by the elastic element during deformation is inconsistent with the setting direction of the deformation adjusting element to form a bending force applied to the deformation adjusting element is avoided; meanwhile, the elastic force generated by the elastic part due to deformation can directly or indirectly act on the driven extrusion wheel, and the problems that the elastic force cannot completely and directly or indirectly act on the driven extrusion wheel due to the fact that the elastic part is bent during elastic deformation to influence the extrusion effect, the stress of the extruded printing wire is uneven, and the printing wire is easily crushed or broken are solved;

3. the two ends of the deformation adjusting piece are provided with the movable ends, so that the freedom degree of movement of the deformation adjusting piece is improved, the self-adaptive adjustment of the self-arranged direction and position can be realized according to the adjustment condition, the influence of the external acting force for bending the deformation adjusting piece is reduced, the bending deformation of the deformation adjusting piece is prevented, and the service life of the device is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a perspective structure of an embodiment of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 from another perspective.

Fig. 3 is a schematic view of the structure of fig. 1 from yet another perspective.

Fig. 4 is a side view schematic of one side of fig. 1.

Fig. 5 is a schematic side view of the other side corresponding to fig. 4.

Fig. 6 is a schematic diagram of a view angle of an embodiment of a driving structure in the present invention.

Fig. 7 is a schematic view of the structure of fig. 6 from another perspective.

Fig. 8 is a schematic structural view of an embodiment of the deceleration structure in the present invention.

FIG. 9 is a schematic diagram of a perspective of one embodiment of an extruded structure in accordance with the present invention.

Fig. 10 is a schematic view of the structure of fig. 9 from another perspective.

Fig. 11 is a schematic view of the structure of fig. 9 from yet another perspective.

Fig. 12 is a schematic view of the structure of fig. 9 from yet another perspective.

Fig. 13 is a schematic view of a still further view of fig. 9.

Fig. 14 is a schematic structural view from a perspective of fig. 9 with the second mounting plate and mounting base removed.

Fig. 15 is a schematic view of the structure of fig. 14 from another perspective.

FIG. 16 is a schematic view of a perspective of one embodiment of a mount in an extruded structure of the present invention.

Fig. 17 is a schematic view of the structure of fig. 16 from another perspective.

Description of reference numerals: the device comprises a wire extruding device 1, a power structure 2, a speed reducing structure 3, an extruding structure 4, a stepping motor support 5, a first mounting plate 6, an inner hexagonal bolt super-short head 7, an inner hexagonal flat-head bolt 8, a pin 9, a stepped shaft 10, a fixed bearing 11, an extruding wheel 12, a second mounting plate 13, a cylindrical nut 14, a long screw 15, a double spring 16, a pneumatic connector 17, a mounting seat 18, a first mounting hole 18a, a second mounting hole 18b, a third mounting hole 18c, a fourth mounting hole 18d, an inner hexagonal countersunk head screw 19, a rolling bearing 20, a flat washer 21, a large belt wheel 22, a small belt wheel 23, a transmission belt 24, a flat key 25, a stepping motor 26 and a printing wire 27.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

The 3D printer comprises the following wire extruding device.

This crowded silk device, including the installing component with locate power structure and the extrusion structure on the installing component, power structure includes the driver, the extrusion structure is including the initiative extrusion wheel and the driven extrusion wheel of mutually supporting, is equipped with the speed reduction structure between power structure and the extrusion structure, the speed reduction structure respectively with driver and initiative extrusion wheel direct or indirect connection, in order to reduce the rotational speed of initiative extrusion wheel.

It should be noted that the mounting components herein are used for mounting the power structure, the extrusion structure and the speed reduction structure, and the structures thereof are various, such as mounting bracket, mounting plate, mounting seat, etc., and the structures thereof are also various, such as bolt, screw, nut, etc,

It should be noted that the driver, the device for driving the driving pinch roller to rotate, can be selected from a motor in general, but can be selected from other types according to the needs.

In addition, the speed reducing structure is used for reducing the rotating speed generated by the driver according to a preset proportion, and the structure can be various, such as a speed reducer (in this case, the driver is directly or indirectly connected with the input end of the speed reducer, and the driving extrusion wheel is directly or indirectly connected with one output end of the speed reducer).

It should be noted that the small wheel body and the large wheel body are both wheel-shaped structures, and there may be various types, such as belt wheels, gears, chain wheels, etc., and there may be various matching of the small wheel body and the large wheel body, such as when both the small wheel body and the large wheel body are gears, they may be directly engaged with each other, or they may be connected by a ring-shaped conveyor belt (in this case, it is a toothed belt with a tooth head), when both the small wheel body and the large wheel body are smooth belt wheels, they may be connected by a ring-shaped conveyor belt (in this case, it is a smooth belt) to achieve synchronous rotation, and when both the small wheel body and the large wheel body are chain wheels, they may be connected by a ring-shaped conveyor belt (in this case, it is a chain belt or a chain) to.

In addition, the pressing structure herein includes, in addition to the driving pressing wheel and the driven pressing wheel which are mutually matched, in one or some embodiments, due to the consideration of the difference of printing materials and the difference of diameters of printing wires which need to be manufactured, the pressing structure further includes a tightness adjusting assembly for adjusting the magnitude of pressing force of the driven pressing wheel on the pressed printing materials, the tightness adjusting assembly includes an elastic member and a deformation adjusting member for adjusting the deformation amount of the elastic member, one end of the elastic member directly or indirectly interacts with the deformation adjusting member, the other end directly or indirectly interacts with the driven pressing wheel, and the elastic member directly or indirectly acts the elastic force generated by the elastic member due to the deformation on the driven pressing wheel to adjust the magnitude of pressing force of the driven pressing wheel on the pressed printing materials.

It should be noted that the deformation adjusting member herein mainly adjusts the position of itself relative to the driven extrusion wheel to achieve the purpose of adjusting the deformation amount of the spring member located between itself and the driven extrusion wheel, and both ends of the deformation adjusting member are usually disposed on the mounting component adjacent to it, and the elastic member herein may refer to a component made of an elastic material, may refer to a structure having elastic deformation, or a combination of the two.

In order to avoid that the elastic force generated by the elastic element when deforming forms a bending force applied to the deformation adjusting element due to the fact that the elastic force is not consistent with the arrangement direction of the deformation adjusting element, in one or some embodiments, the elastic element is sleeved on the deformation adjusting element and moves on the deformation adjusting element when deforming. The above arrangement makes the direction of the elastic force generated by the elastic element when the elastic element is deformed and the sleeving direction of the elastic element (i.e. the arrangement direction of the deformation adjusting element) keep basically consistent, and in addition, the elastic force generated by the elastic element due to deformation does not reduce the elastic force directly or indirectly acting on the driven extrusion wheel because the elastic element is bent when the elastic force directly or indirectly acts on the driven extrusion wheel.

In order to reduce the occurrence of bending force applied to the deformation adjusting member by the mounting member cooperating with the deformation adjusting member during operation, in one or some embodiments, two ends of the deformation adjusting member are not fixed to the mounting member, so that the deformation adjusting member can adaptively adjust the direction and position of the deformation adjusting member according to the adjusting condition.

It should be noted that, although both ends of the deformation adjusting member are not fixed to the mounting member, the deformation adjusting member is clamped by the elastic member and the mounting member adjacent to the elastic member, so as to ensure that the deformation adjusting member does not move randomly during operation, thereby facilitating the stability of the pressing force of the elastic member on the driven squeezing wheel.

In one or some embodiments, the mounting part provided with the driven extrusion wheel is hinged, one end of the deformation adjusting part is movably arranged on the mounting part provided with the driven extrusion wheel, the elastic part is arranged at a position between one end of the deformation adjusting part and the mounting part provided with the driven extrusion wheel and keeps a deformed state, the driven extrusion wheel synchronously rotates along with the mounting part provided with the driven extrusion wheel when the deformation adjusting part adjusts the deformation amount of the elastic part, so that the moving direction of the driven extrusion wheel is changed from multi-dimension to single-dimension (namely, the driven extrusion wheel rotates around a plane), the control of the magnitude of the pressing force directly or indirectly acting on the driven extrusion wheel by the deformation adjusting part is facilitated, of course, the mounting part provided with the driven extrusion wheel can be disconnected with the mounting part adjacent to the driven extrusion wheel and is in a movable state, and the mounting part provided with the driven extrusion wheel can adjust the position and/or transmit the pressing force to the driven extrusion wheel only by the deformation adjusting part matched with the driven extrusion wheel.

As shown in fig. 1 to 5, the present filament extruding apparatus includes a mounting member, and a power structure 2, an extruding structure 4 and a decelerating structure 3 provided thereon.

As shown in fig. 1 to 17, the mounting components here include a stepping motor bracket 5, a first mounting plate 6, an inner hexagon bolt super short head 7, an inner hexagon flat head bolt 8, a pin 9, a second mounting plate 13, and a mounting seat 18.

As shown in fig. 6 to 7, the power structure 2 herein includes a stepping motor 26, and a motor shaft thereon sequentially passes through the lower middle hole of the first mounting plate 6 and the middle hole of the stepping motor bracket 5, and is fixed by four hexagon socket head bolts ultrashort heads 7.

As shown in fig. 8, the speed reducing structure 3 is disposed on the stepping motor bracket 5 and the first mounting plate 6 in the mounting member, and includes a large pulley 22 with a larger radius, a small pulley 23 with a smaller radius, a transmission belt 24 and a flat key 25, and the large pulley 22, the small pulley 23 and the transmission belt 24 are all provided with teeth for engagement, the small pulley 23 is tightly connected with the motor shaft of the stepping motor 26 through the flat key 25, while the central hole of the large pulley 22 is provided with a structure of the stepped shaft 10 (which is a rotary shaft but not limited to this structure) in the pressing structure 4, the motor shaft drives the small pulley 23 to rotate at the same speed, the teeth of the small pulley 23, the large pulley 22 and the transmission belt 24 are engaged with each other, the transmission belt 24 transmits the mechanical energy of the small pulley 23 to the large pulley 25, the large pulley 25 drives the stepped shaft 10 to rotate synchronously, and 20 teeth are provided on the small pulley, the big belt wheel is provided with 60 gear teeth, so that the speed reduction transmission with the speed of 3: 1 can be realized.

As shown in fig. 9 to 17, the pressing structure 4, which is provided between the first mounting plate 6 and the second mounting plate 13 of the mounting member and is connected between the first mounting plate 6 and the second mounting plate 13 by eight hexagon socket head cap bolts 8 and 4 corresponding studs 9, includes a double spring 16 (a structure as an elastic member, but not limited to this structure), a cylindrical nut 14 and a long screw 15 (two structures as deformation adjusting members, but not limited to this structure, where the cylindrical nut 14 and the long screw 15 are threadedly engaged and the cylindrical nut 14 is in a movable arrangement, which is restricted only in a longitudinal direction of the long screw 15 by preventing it from moving toward an end of the long screw 15 on which the double spring 16 is mounted, by two studs 9 spaced less than a width of the cylindrical nut 14), a stepped shaft 10 and fixed bearings 11, which are mounted on both ends of the stepped shaft 10, A pressing wheel 12 (as a structure of a driving pressing wheel, but not limited to this structure) provided on the stepped shaft 10 to rotate in synchronization therewith, a rolling bearing 20 (as a structure of a driven pressing wheel, but not limited to this structure), the rolling bearing 20 being mounted on a hexagon socket countersunk screw 19 (the rolling bearing 20 being rotatable on the hexagon socket countersunk screw 19) fixed in a mounting seat 18 in the mounting part, and a pneumatic joint 17 for feeding a printing wire 27 being further provided.

In addition, the mounting seat 18 is provided with 4 holes, which are respectively a first mounting hole 18a for mounting the pneumatic connector 17 and a second mounting hole 18b for allowing one end of the long screw 15 to pass through and movably fit with the long screw, and one end of the long screw 15 is sleeved with a double spring 16 (so that two ends of the double spring 16 respectively abut against one end of the long screw 15 and the mounting seat 18, and the deformation amount of the double spring 16 is changed by adjusting the relative position of the long screw 15 on the cylindrical nut 14, so that the pressing force on the printed material generated when the elastic force generated by the deformation amount of the double spring 16 indirectly acts on the rolling bearing 20 is correspondingly changed, and in addition, two ends of the long screw 15 are movable ends, so that the freedom degree of the long screw 15 is increased, the long screw 15 can move along the longitudinal direction thereof to adapt to adjustment, and the long screw is prevented from being bent by external shearing force), the third mounting hole 18c is used for mounting an inner hexagonal countersunk screw 19 (a rolling bearing 20 is mounted on the screw, and the rolling bearing 20 can rotate around the inner hexagonal countersunk screw 19), the fourth mounting hole 18d is used for allowing a pair of inner hexagonal flat-head bolts 8 connected with the first mounting plate 6 and the second mounting plate 13 and 1 pin 9 sleeved on the pair of inner hexagonal flat-head bolts 8 to pass through (when the adjustment is carried out, the mounting seat 18 can rotate around the pair of hexagonal flat-head bolts 8), and the pneumatic connector 17, the long screw 15, the double spring 16 and the rolling bearing 20 are simultaneously arranged on the mounting seat 18, so that the structure is compact, and the mounting space is saved.

The working principle of this embodiment is as follows.

The first step is as follows: preparation work

In the initial state, it is checked whether the stepping motor 26 is in a good operation condition.

The second step is that: starting control:

after the inspection is finished, all the steps are normal, and the step motor 26 is controlled to be started.

The third step: printing filament extrusion

By advancing the motor shaft on motor 26, the electrical energy is converted into mechanical energy for its rotation. The motor shaft drives the small belt wheel 23 to rotate at the same rotating speed, the teeth of the small belt wheel 23, the large belt wheel 25 and the transmission belt 24 are meshed with each other, the transmission belt 24 transmits the mechanical energy of the small belt wheel 23 to the large belt wheel 25, and the small belt wheel is provided with 20 teeth and the large belt wheel is provided with 60 teeth, so that the speed ratio of the small belt wheel to the large belt wheel is equal to 3: 1. The pressing wheel 12 rotates at the same speed as the stepped shaft 10, and the pressing wheel 12 and the rolling bearing 20 extrude the printing wire 27 together by the friction force with the printing wire on the pressing wheel 12.

It should be noted that the above terms used herein are only for the convenience of describing and explaining the essence of the present invention and do not exclude the possibility of using other terms. They are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.