CN217414914U - Printing head device for 3D printer and 3D printer - Google Patents

Abstract

The embodiment of the disclosure provides a printing head device for a 3D printer and the 3D printer, wherein the printing head device comprises a fixed seat, a mounting plate, two printing heads, two extruders, a printing head motor, a printing head gear and a driving mechanism; the mounting plate is connected with the fixing seat, the two printing heads are both connected with the mounting plate, and the printing head motor drives the printing head gear to rotate; the driving mechanism is in transmission connection with the mounting plate to drive the mounting plate to switch between a first position and a second position relative to the fixed seat. When the mounting plate is at the first position, the printing head gear is matched with an extruder to drive the extruder to drive a stockline in a printing head to move; when the mounting plate is in the second position, the print head gear is matched with the other extruder to drive the material line in the other print head to move. In this way, the stocklines in the two printing heads in the printing head device are driven by the same driving source, so that one driving source is omitted, and the structure of the printing head device is simplified.

Description

Printing head device for 3D printer and 3D printer

Technical Field

The utility model relates to a 3D prints technical field, especially relates to a beat printer head device and 3D printer for 3D printer.

Background

The 3D printer is also called a three-dimensional printer, which is a machine capable of rapid prototyping, and is widely used for manufacturing models and parts. Existing 3D printers typically have a print head that is capable of heating a strand and building a three-dimensional object in a layer-by-layer printing manner. However, in the printing process, if the printing material needs to be switched, the machine needs to be stopped and a new material line needs to be replaced, so that the printing efficiency is low.

A3D printer has two and beats printer heads in the correlation technique, and two are beaten printer heads and can switch over to print, like this, when changing a printing material who beats printer head, and 3D printer also need not to stop, prints efficiently. However, in the 3D printer of the related art, two driving sources are required to be arranged to respectively drive the two material lines on the printing heads to move, so that the structure of the 3D printer is complicated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a beat printer head device and 3D printer for 3D printer to make the structure that has two 3D printers of beating printer head comparatively simple.

According to a first aspect of the present disclosure, there is provided a print head device for a 3D printer, comprising: the printing device comprises a fixed seat, an installation plate, a first printing head, a second printing head, a first extruder, a second extruder, a printing head motor, a printing head gear and a driving mechanism;

the mounting plate is connected with the fixed seat and can move relative to the fixed seat;

the first printing head and the second printing head are fixedly connected with the mounting plate so as to move along with the mounting plate;

the first extruder and the second extruder are respectively arranged on the first printing head and the second printing head;

the printing head motor is arranged on the fixed seat; the printing head gear is in transmission connection with a printing head motor; the driving mechanism is in transmission connection with the mounting plate to drive the mounting plate to switch between a first position and a second position relative to the fixing seat, when the mounting plate is located at the first position, the printing head gear is in transmission fit with the first extruder to drive the material line in the first printing head to move, and when the mounting plate is located at the second position, the printing head gear is in transmission fit with the second extruder to drive the material line in the second printing head to move.

In one possible embodiment, the mounting plate is rotatable about a horizontal axis relative to the fixed base, the drive mechanism is for driving the mounting plate to rotate about the horizontal axis to switch between a first position and a second position, the first print head is oriented in a vertical direction when the mounting plate is in the first position, and the second print head is oriented in a vertical direction when the mounting plate is in the second position.

In one possible embodiment, the driving mechanism includes a switching gear, and the mounting plate includes a meshing portion that meshes with the switching gear, and the switching gear is configured to rotate the mounting plate about the horizontal axis through the meshing portion under the driving of the power source.

In one possible embodiment, the mounting plate includes a circular arc-shaped portion, an edge of which is formed with a plurality of gear teeth as the engaging portion.

In one possible embodiment, the driving mechanism includes a rotating shaft connected to the mounting plate and having an axis as the horizontal axis, the rotating shaft being configured to rotate the mounting plate about the horizontal axis under the driving of the power source.

In one possible embodiment, the mounting plate is translatable relative to the fixed base, and the drive mechanism is configured to drive the mounting plate to translate to switch between the first position and the second position.

In a possible embodiment, the first extruder comprises a first driving gear, a first driven gear, a first roller and a second roller, the first driving gear is coaxially and fixedly connected with the first roller, the first driven gear is coaxially and fixedly connected with the second roller, the first driving gear is meshed with the first driven gear, and the first roller and the second roller are used for clamping and extruding the material line in the first printing head; when the mounting plate is at the first position, the first driving gear is meshed with the printing head gear;

the second extruder comprises a second driving gear, a second driven gear, a third roller and a fourth roller, the second driving gear is coaxially and fixedly connected with the third roller, the second driven gear is coaxially and fixedly connected with the fourth roller, the second driving gear is meshed with the second driven gear, and the third roller and the fourth roller are used for clamping and extruding a material line in the second printing head; when the mounting plate is in the second position, the second driving gear is engaged with the print head gear.

In a possible embodiment, the first roller is positioned on one side of the first driving gear, which faces away from the mounting plate, and the second roller is positioned on one side of the first driven gear, which faces away from the mounting plate; the third roller is located one side of the second driving gear back to the mounting plate, and the fourth roller is located one side of the second driven gear back to the mounting plate.

In a possible embodiment, further comprising: the fixing seat is connected to the horizontal guide rod in a sliding mode.

According to a second aspect of the present disclosure, there is provided a 3D printer comprising: a first aspect of the present disclosure provides a printhead apparatus.

The embodiment of the disclosure provides a printing head device for a 3D printer and the 3D printer, wherein the printing head device is characterized in that a fixing seat, a mounting plate, a first printing head, a second printing head, a first extruder, a second extruder, a printing head motor, a printing head gear and a driving mechanism are designed; the mounting plate is connected with the fixed seat and can move relative to the fixed seat; the first printing head and the second printing head are fixedly connected with the mounting plate so as to move along with the mounting plate; the first extruder and the second extruder are respectively arranged on the first printing head and the second printing head; the printing head motor is arranged on the fixed seat; the printing head gear is in transmission connection with a printing head motor; the driving mechanism is in transmission connection with the mounting plate to drive the mounting plate to switch between a first position and a second position relative to the fixing seat, when the mounting plate is located at the first position, the printing head gear is in transmission fit with the first extruder to drive the material line in the first printing head to move, and when the mounting plate is located at the second position, the printing head gear is in transmission fit with the second extruder to drive the material line in the second printing head to move.

Through setting up like this, beat the printer head device and need not to shut down just can change the stockline, greatly promoted printing efficiency, be favorable to reducing the reloading loss. Moreover, compared with the prior art in which two driving sources are arranged to drive the stocklines in the two printing heads to move respectively, the stocklines in the two printing heads in the printing head device of the embodiment are driven by the same driving source, so that one driving source is omitted, and the structure of the printing head device is simplified.

These and other aspects of the disclosure will be apparent from and elucidated with reference to the embodiments described hereinafter.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are not to be considered limiting of its scope.

Fig. 1 is a schematic structural view of a print head device provided by an embodiment of the present disclosure, when a mounting plate is in a first position;

FIG. 2 is a front view of the printhead device shown in FIG. 1 with the mounting plate in a first position;

FIG. 3 is a schematic view of the printhead device of FIG. 1 with the mounting plate in a second position;

FIG. 4 is a front view of the printhead device shown in FIG. 1 with the mounting plate in a second position;

FIG. 5a is a schematic view of a mounting plate in a printhead device provided by an embodiment of the disclosure;

FIG. 5b is a schematic view of another mounting plate in a printhead apparatus provided in accordance with an embodiment of the present disclosure;

FIG. 6 is a schematic view of another printhead arrangement provided by embodiments of the present disclosure;

fig. 7 is a partially enlarged view of a point a in fig. 1.

Description of reference numerals:

100-a print head device;

110-a fixed seat;

120-a first printhead; 121-a first spray head; 122-a first heating block; 123-a first fan;

130-a second print head; 131-a second spray head; 132-a second heating block; 133-a third fan;

140-a first extruder; 141-a first drive gear; 142-a first driven gear; 143-a first roller; 144-a second roller;

150-a second extruder; 151-second driving gear; 152-a second driven gear; 153-third roller; 154-fourth roller;

160-a mounting plate; 161-avoidance slots; 162-notch; 163-lightening holes; 164-gear teeth; 165-meshing teeth;

170-print head gear;

180-a drive mechanism; 181-a power source; 182-switching gear;

190-a guide bar;

200-stockline.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways, without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

The related art provides a 3D printer having two print heads, both of which are mounted on a switching plate capable of swinging, and if it is necessary to switch from one print head to another print head, the switching plate can be driven to swing, so that the other print head moves to a printing position for printing. Like this, the 3D printer need not to shut down, and printing efficiency is high. However, the stocklines in the two printing heads of the 3D printer are driven by different driving sources to move, so that the structure of the 3D printer is complicated. In addition, the cost of the 3D printer is also high.

In view of the above problem, embodiments of the present disclosure provide a print head device for a 3D printer and a 3D printer, and are described below with reference to the drawings in the embodiments of the present disclosure. It is noted that the terminology used in the description of the embodiments of the disclosure herein is for the purpose of describing particular embodiments of the disclosure only and is not intended to be limiting of the disclosure.

The embodiment provides a printing head device 100 which is used in a 3D printer to realize a printing function. Fig. 1 schematically shows a structural view of the print head apparatus 100 with the mounting plate 160 in the first position, and fig. 2 schematically shows a front view of the print head apparatus 100 with the mounting plate 160 in the first position. Referring to fig. 1 and 2, the print head device may specifically include a fixing base 110 and a mounting plate 160, the mounting plate 160 is connected to the fixing base 110, and the mounting plate 160 is movable relative to the fixing base 110.

The fixing base 110 is used to provide support for the mounting plate 160, the fixing base 110 is not limited to be in a cube shape as shown in fig. 1, and may be in other shapes such as a cylinder, and the fixing base 110 can move to change the printing position of the print head device 100. In fig. 2, the print head device 100 may further include a horizontal guide bar 190, and the fixing base 110 may be slidably coupled to the horizontal guide bar 190. Therefore, when the 3D printer is in operation, the fixing base 110 can slide along the guide rod 190 to change the position of the entire printing head device 100 in the left-right direction.

The printhead arrangement 100 further includes a first printhead 120, a second printhead 130, a first extruder 140, and a second extruder 150. The first print head 120 and the second print head 130 can each be loaded with the feed line 200, and the first print head 120 and the second print head 130 are each fastened to the mounting plate 160. In this way, the first and second printheads 120, 130 can change positions with the movement of the mounting plate 160. The first extruder 140 is disposed on the first printhead 120, and the first extruder 140 can drive the material line 200 in the first printhead 120 to move when operating, so as to feed or discharge the material to the first nozzle 121 of the first printhead 120. Similarly, the second extruder 150 is disposed on the second print head 130, and the second extruder 150 is capable of driving the material line 200 in the second print head 130 to move when operating, so as to feed or discharge the material to the second nozzle 131 of the second print head 130.

The first printhead 120 may further include a first heating block 122, and the first heating block 122 is disposed near the first nozzle 121 to melt the material line 200 in the first printhead 120 for printing. Similarly, the second print head 130 includes a second heater block 132, and the second heater block 132 is disposed near the second nozzle 131 to melt the material line 200 in the second print head 130 for printing.

Further, the first print head 120 may further include a first fan 123, and the first fan 123 is located above the first heating block 122, so as to prevent a end of the first print head 120 away from the first nozzle 121 from being heated. Similarly, a second fan 133 may be further disposed on the second print head 130, and the second fan 133 is located above the second heating block 132 to avoid heating up of the end of the second print head 130 away from the second nozzle 131.

The printhead device 100 also includes a printhead motor (not shown), a printhead gear 170, and a drive mechanism 180. The print head motor is fixedly mounted on the fixing base 110, and the fixing base 110 provides support for the print head motor. The printhead motor is also drivingly connected to the printhead gear 170 to drive the printhead gear 170 in rotation. Here, it is understood that the motor shaft of the head motor extends in the horizontal direction, and the head gear 170 rotates about the rotation axis parallel to the horizontal direction.

Fig. 3 schematically shows a structural view of the mounting plate 160 of the printhead device 100 in the second position, and fig. 4 schematically shows a front view of the mounting plate 160 of the printhead device 100 in the second position. Referring to fig. 1 to 4, the driving mechanism 180 is also fixedly mounted on the fixing base 110, and the fixing base 110 provides a support for the driving mechanism 180. The driving mechanism 180 is drivingly connected to the mounting plate 160, and the driving mechanism 180 is capable of actuating the mounting plate 160 between the first position and the second position. It is understood that, when the 3D printer is in the initial state, the mounting plate 160 may be in the first position or in the second position, which is not limited in this embodiment.

When the drive mechanism 180 drives the mounting plate 160 to a first position, such as shown in fig. 1 and 2, the print head gear 170 is drivingly engaged with the first extruder 140. The print head motor transmits power to the first extruder 140 through the print head gear 170, and the first extruder 140 rotates and drives the strand 200 in the first print head 120 to move. When the drive mechanism 180 drives the mounting plate 160 to a second position, such as shown in fig. 3 and 4, the print head gear 170 is drivingly engaged with the secondary extruder 150. The print head motor transmits power to the second extruder 150 through the print head gear 170, and the second extruder 150 rotates and drives the strand 200 in the second print head 130 to move. That is, the driving mechanisms for driving the first extruder 140 and the second extruder 150 are the same and are the printhead motor and the printhead gear 170. As the position of the mounting plate 160 is switched, the positions of the first and second printheads 120 and 130 are changed. The head gear 170 can be switched between the states of driving the first extruder 140 and driving the second extruder 150, so that the operating states of the first and second heads 120 and 130 are changed.

The first print head 120 and the second print head 130 are arranged at intervals along the moving direction of the mounting plate 160 to ensure that when the mounting plate 160 is in the first position, the first print head 120 is oriented in the vertical direction, so that the material line 200 heated by the first print head 120 can fall down on the working platform of the 3D printer to realize printing. And when the mounting plate 160 is in the second position, the second printing head 130 is oriented in the vertical direction, so that the material line 200 heated by the second printing head 130 can fall down on the working platform of the 3D printer to realize printing.

Here, taking the example that the mounting plate 160 is in the first position when the 3D printer is in the initial state, an exemplary operating principle of the print head apparatus 100 is as follows:

the mounting plate 160 is in the first position with the first printhead 120 oriented in a vertical direction. The print head gear 170 is in driving engagement with the first extruder 140 to drive the material line 200 in the first print head 120 to move. At this time, the first printhead 120 is operating and the second printhead 130 is idle.

When it is desired to switch from the first printhead 120 to the second printhead 130, the drive mechanism 180 drives the mounting plate 160 from the first position to the second position, with the second printhead 130 oriented in a vertical direction. The print head gear 170 is in driving fit with the second extruder 150 to drive the strand 200 in the second print head 130 to move. At this time, the first printhead 120 is idle and the second printhead 130 is operating.

When it is desired to switch from the second printhead 130 to the first printhead 120, the drive mechanism 180 drives the mounting plate 160 from the second position to the first position, with the first printhead 120 oriented in a vertical direction. The print head gear 170 is in driving engagement with the first extruder 140, and the first print head 120 is in operation and the second print head 130 is idle.

In summary, the print head device 100 provided in this embodiment can replace the stockline 200 without stopping the machine, thereby greatly improving the printing efficiency and being beneficial to reducing the material replacement loss. Moreover, compared with the related art in which two driving sources are provided to drive the stocklines 200 in the two printing heads 120 and 130 to move respectively, the stocklines 200 in the two printing heads 120 and 130 in the printing head device 100 of the embodiment are driven by the same driving source, so that one driving source is omitted, which is not only beneficial to simplifying the structure of the printing head device 100, but also beneficial to reducing the cost of the printing head device 100.

It should be noted that the material and color of the material line 200 loaded by the first printing head 120 and the second printing head 130 may be different, so that the operating state of the first printing head 120 and the second printing head 130 is switched by driving the mounting plate 160 to move, and the printing material and/or the printing color is switched, so that the printed three-dimensional object may be made of multiple materials and/or multiple colors.

In the example shown in fig. 1 to 4, the first print head 120 and the second print head 130 are both mounted on a side of the mounting plate 160 facing away from the fixed base 110, and the first extruder 140 and the second extruder 150 are also located on a side of the mounting plate 160 facing away from the fixed base 110. The mounting plate 160 is provided with an escape groove 161. The motor shaft of the print head motor extends out of the avoiding groove 161 to the side of the mounting plate 160 facing away from the fixing seat 110 and is in transmission connection with the print head gear 170, so that the print head gear 170 is also located on the side of the mounting plate 160 facing away from the fixing seat 110 to be capable of being matched with the first extruder 140 or the second extruder 150. It is understood that, as the position of the mounting plate 160 is switched, the relative positional relationship between the head gear 170 and the escape groove 161 is also changed. Specifically, when the mounting plate 160 is in the first position, the head gear 170 may be near one end of the escape slot 161; when the mounting plate 160 is in the second position, the print head gear 170 is near the other end of the escape slot 161.

As an alternative embodiment, fig. 5a and 5b schematically show the structure of the mounting plate 160. As shown in fig. 5a and 5b, the mounting plate 160 may also have a notch 162 formed therein, with the motor shaft of the printhead motor extending from the notch 162. That is, a portion of the mounting plate 160 between the first and second printheads 120 and 130 is open. As such, the print head gear 170 may be fixed relative to the fixing base 110 and located between the first print head 120 and the second print head 130.

Wherein the driving mechanism 180 drives the mounting plate 160 to move relative to the fixing base 110 may include the following possible examples:

in one example, as shown in fig. 1 to 4, the mounting plate 160 is rotatable about a horizontal axis relative to the fixed base 110, and the driving mechanism 180 drives the mounting plate 160 to rotate to switch between the first position and the second position. In this example, the path of movement of the mounting plate 160 is an arc, and the first and second printheads 120, 130 are disposed on the mounting plate 160 spaced about a horizontal axis. Thus, when the mounting plate 160 is rotated to the first position, the first printhead 120 is oriented in a vertical direction and the second printhead 130 is tilted to a horizontal plane; when the mounting plate 160 is rotated to the second position, the first printhead 120 is tilted to the horizontal and the second printhead 130 is switched to be oriented in the vertical direction. It should be noted that in the embodiment where the mounting plate 160 is provided with the avoidance groove 161, the avoidance groove 161 is correspondingly curved.

Illustratively, the mounting plate 160 may be rectangular, triangular, circular, etc. in shape. For example, as shown in fig. 1 and 2, the mounting plate 160 may have a fan shape. The first and second printing heads 120 and 130 are respectively disposed near both side edges of the fan-shaped mounting plate 160, compared to the mounting plate 160 having a rectangular shape. In this way, while the mounting plate 160 can accommodate the first and second printheads 120 and 130, the size of the mounting plate 160 can be minimized, which is advantageous in reducing material costs.

It should be noted that, if the position of the first print head 120 is the printing position when the mounting plate 160 is at the first position, since the mounting plate 160 is switched from the first position to the second position, although the second print head 130 is switched to the vertical orientation, the position of the second print head 130 cannot swing to the printing position of the first print head 120 before the switching, at this time, the fixing base 110 can be moved by driving the guide rod 190, and the position of the entire print head apparatus 100 can be adjusted, so that the second print head 130 is moved to the printing position of the first print head 120 before the switching, so as to continue the previous printing operation.

The following describes a possible implementation of the mounting plate 160 being rotatable about a horizontal axis relative to the fixed base 110.

In a first implementable manner, drive mechanism 180 may include a power source 181 and a spindle. The shaft extends horizontally and the mounting plate 160 is fitted over the shaft. The power source 181 can drive the shaft to rotate around the horizontal axis, and further drive the mounting plate 160 to rotate. With such a design, the driving mechanism 180 has a simple structure.

In a second possible implementation, the driving mechanism includes a power source 181 and a transmission member, and the mounting plate 160 includes an engagement portion that engages with the switching gear 182. The power source 181 drives the transmission member to rotate, and the transmission member is in driving engagement with the engagement portion to transmit power to the mounting plate 160, thereby enabling the mounting plate 160 to rotate about a horizontal axis. For example, the transmission member may be a worm, the worm extends in a horizontal direction, an axis of the worm is perpendicular to the horizontal axis, in this case, the meshing portion is a worm wheel, and the worm and the meshing portion may constitute a worm and gear mechanism. For another example, as shown in fig. 1 to 4, the transmission member may be a switching gear 182, and an axis of the switching gear 182 is parallel to the horizontal axis, in which case, the switching gear 182 and the meshing portion may constitute a gear mechanism.

Thus, in one aspect, the present embodiment is designed such that the driving mechanism 180 includes a transmission member, and the torque output by the power source 181 can be adjusted, for example, to achieve a reduced speed, so as to meet the rotation requirement of the mounting plate 160. On the other hand, the worm gear mechanism and the gear mechanism have accurate transmission ratio and compact structure. Moreover, by designing the switching gear 182, in comparison with the first realizable manner, when the mounting plate 160 is switched to the first position or the second position, the engagement relationship of the switching gear 182 and the engaging portion may realize locking so that the mounting plate 160 reaching the first position can be maintained at the first position, or so that the mounting plate 160 reaching the second position can be maintained at the second position. In this way, it is advantageous to ensure that the first print head 120 or the second print head 130 can perform printing stably.

For example, in the embodiment where the transmission member is the switching gear 182, the engaging portion may be embodied as a transmission gear fixed on the mounting plate 160 and engaged with the switching gear 182. Or, alternatively, as shown in fig. 1 to 4, in an embodiment where the transmission member is the switching gear 182, the mounting plate 160 may further include a circular arc portion, an edge of the circular arc portion being formed with a plurality of gear teeth 164, the plurality of gear teeth 164 being configured as a meshing portion.

It will be appreciated that when the engagement portion is a drive gear, only a portion of the teeth on the drive gear actually engage the switching gear 182, as the mounting plate 160 only oscillates back and forth between the first and second positions. In the example shown in fig. 1 to 4, the engaging portion is formed by the edge of the circular arc portion of the mounting plate 160, a transmission gear does not need to be separately provided, the number of the gear teeth 164 which cannot be engaged is reduced, and the utilization rate is improved.

The power source 181 is not limited. For example, the power source 181 may be a motor or a manual driving device such as a handle. When the power source 181 is a motor, the power source 181 may specifically be a stepping motor, and in a first implementation manner, the number of steps of the stepping motor may be reasonably designed, so that when the stepping motor moves N (N is a positive integer) whole steps, the mounting plate 160 can be switched from the first position to the second position.

In another example, as shown in fig. 6, the mounting plate 160 can translate in a horizontal direction relative to the fixed base 110, and the driving mechanism 180 drives the mounting plate 160 to move to switch between the first position and the second position. In this example, the movement path of the mounting plate 160 is a horizontal straight line, and the first and second printing heads 120 and 130 are disposed on the mounting plate 160 at intervals in the horizontal direction. Thus, when the 3D printer is in the initial state, the first print head 120 and the second print head 130 are both oriented in the vertical direction; and the mounting plate 160 is in either the first or second position, the first and second printheads 120, 130 are oriented in a vertical direction. It should be noted that in the embodiment where the mounting plate 160 is provided with the avoidance groove 161, the avoidance groove 161 is correspondingly linear. Fig. 6 schematically shows the structure of another printhead device 100.

Wherein the mounting plate 160 may be rectangular. Compared to the fan-shaped or circular mounting plate 160, the rectangular mounting plate 160 can be minimized in size while allowing the first and second printheads 120 and 130 to be mounted, which is advantageous in reducing material costs.

In this embodiment, the driving mechanism 180 can drive the mounting plate 160 to translate. Illustratively, the driving mechanism 180 may include, for example, a power source 181 and a switching gear 182, and a rack engaged with the switching gear 182 may be fastened to the mounting plate 160, and the rack extends in a horizontal direction. When it is necessary to switch the position of the mounting plate 160, the power source 181 operates and drives the switching gear 182 to rotate. The switching gear 182 moves the rack, which in turn translates the rack-coupled mounting plate 160. Alternatively, in an alternative embodiment, as shown in fig. 6, the mounting plate 160 has a rectangular shape, and the upper edge or the lower edge of the mounting plate 160 may be formed with a plurality of engaging teeth 165, and the plurality of engaging teeth 165 are engaged with the switching gear 182, in which case, the entire mounting plate 160 may be regarded as a rack.

Of course, in some other embodiments of the present disclosure, the driving mechanism 180 may also be an electric telescopic rod. Alternatively, the driving mechanism 180 may further include a power source 181, a lead screw extending in a horizontal direction, the lead screw being in transmission connection with the power source 181, and a lead screw nut sleeved on the lead screw and fastened to the mounting plate 160. Thus, the power source 181 drives the lead screw to rotate, and the lead screw nut slides along the lead screw, thereby driving the mounting plate 160 to translate along a horizontal line.

The installation position of the driving mechanism 180 is not limited. The driving mechanism 180 may be installed above the fixing base 110, or may be installed below the fixing base 110. As can be seen particularly in fig. 1, when the driving mechanism 180 is mounted above the fixing base 110, an engaging portion for engaging with a transmission member of the driving mechanism 180 is correspondingly formed on an upper portion of the mounting plate 160.

Fig. 7 is a partially enlarged view of a portion a in fig. 1. Referring to fig. 7, the first extruder 140 may specifically include a first driving gear 141, a first driven gear 142, a first roller 143, and a second roller 144. The first driving gear 141 is coaxially and fixedly connected with the first roller 143. The first driven gear 142 is coaxially and fixedly connected with the second roller 144. The first driving gear 141 is engaged with the first driven gear 142. The first roller 143 and the second roller 144 are used to nip the material line 200 in the first printhead 120. When the mounting plate 160 is in the first position, the first drive gear 141 engages the printhead gear 170. Thus, the first extruder 140 has both a gear set and a roller set, wherein the gear set can be in transmission fit with the print head gear 170 to receive the power transmitted by the print head gear 170, so as to drive the material line 200 of the first print head 120 to move, and the roller set can extrude the material line 200. That is, the first extruder 140 can press the strand 200 while being capable of moving the strand 200. Moreover, the surfaces of the rollers 143, 144 are smooth to reduce the risk of damage to the surface of the stockline 200, compared to pressing the stockline 200 directly with the gear sets 141, 142.

Similarly, as shown in fig. 7, the second extruder 150 may include a second driving gear 151, a second driven gear 152, a third roller 153, and a fourth roller 154. The second driving gear 151 is coaxially and fixedly connected with the third roller 153, and the second driven gear 152 is coaxially and fixedly connected with the fourth roller 154. The second driving gear 151 is engaged with the second driven gear 152. The third roller 153 and the fourth roller 154 are used to pinch the strand 200 in the second print head 130. When the mounting plate 160 is in the second position, the second drive gear 151 engages the print head gear 170. With this arrangement, the second extruder 150 can extrude the strand 200 while being able to move the strand 200 in the second print head 130. Moreover, the surfaces of the rollers 153, 154 are smooth to reduce the risk of damage to the surface of the strand 200, as compared to pressing the strand 200 directly with the gear sets 151, 152.

The first roller 143 may be disposed on a side of the first driving gear 141 facing away from the mounting plate 160, and the second roller 144 is disposed on a side of the first driven gear 142 facing away from the mounting plate 160. Thus, when the 3D printer is operating, the operator can easily observe that the wire 200 is pinched by the first and second rollers 143 and 144. Similarly, the third roller 153 is located on a side of the second driving gear 151 facing away from the mounting plate 160, and the fourth roller 154 is located on a side of the second driven gear 152 facing away from the mounting plate 160.

Of course, in other embodiments, the first roller 143 may be located on the side of the first driving gear 141 facing the mounting plate 160, and the second roller 144 may be located on the side of the first driven gear 142 facing the mounting plate 160.

Additionally, in some embodiments of the present disclosure, the mounting plate 160 may also be provided with lightening holes 163. By designing the lightening holes 163, it is advantageous to lighten the weight of the printhead apparatus 100. Illustratively, the lightening holes 163 may be provided between the first and second printheads 120 and 130, and in particular may be located between the first and second extruders 140 and 150. Of course, the lightening holes 163 may be provided in plural, for example, in the example shown in fig. 2, the mounting plate 160 is provided with three lightening holes 163. By increasing the number of lightening holes 163, the weight of the printhead apparatus 100 can be further reduced.

The present embodiment also provides a 3D printer, which may include the print head apparatus 100. The print head device 100 may be described in any of the above embodiments, and reference may be made to the above embodiments specifically, which are not described herein again. Including the aforesaid with the 3D printer design and beat printer head device 100, this 3D printer need not to shut down just can change and beat the stockline 200 on the printer head device 100, has greatly promoted printing efficiency, is favorable to reducing the reloading loss. Compared with the prior art in which two driving sources are arranged to drive the stockline 200 in the two printing heads to move, the stockline 200 in the two printing heads 120 and 130 in the 3D printer of the embodiment is driven by the same driving source, so that one driving source is omitted, which is not only beneficial to simplifying the structure of the printing head device 100, but also beneficial to reducing the cost of the printing head device 100.

It will be understood that in this specification, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicate an orientation or positional relationship or dimension based on that shown in the drawings, which terms are used for convenience of description only and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting to the scope of the disclosure.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

This description provides many different embodiments or examples that can be used to implement the present disclosure. It should be understood that these various embodiments or examples are purely exemplary and are not intended to limit the scope of the disclosure in any way. Those skilled in the art can conceive of various changes or substitutions based on the disclosure of the specification of the present disclosure, which are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope defined by the appended claims.

Claims (10)

1. A print head device for a 3D printer, comprising:

a fixed seat;

the mounting plate is connected with the fixed seat and can move relative to the fixed seat;

the first printing head and the second printing head are fixedly connected with the mounting plate so as to move along with the mounting plate;

a first extruder and a second extruder disposed on the first printhead and the second printhead, respectively;

the printing head motor is arranged on the fixed seat;

the printing head gear is in transmission connection with the printing head motor; and

drive mechanism, drive mechanism with the mounting panel transmission is connected, in order to drive the mounting panel for the fixing base switches between primary importance and second place, works as the mounting panel is in during the primary importance, the print head gear with first extruder transmission cooperation is in order to order about first extruder drives the stockline motion in the first print head, and works as the mounting panel is in during the second place, the print head gear with second extruder transmission cooperation is in order to order about the second extruder drives stockline motion in the second is beaten printer head.

2. The printhead device of claim 1,

the mounting plate can rotate around a horizontal axis relative to the fixed seat,

the drive mechanism is used for driving the mounting plate to rotate around the horizontal axis so as to switch between the first position and the second position, when the mounting plate is in the first position, the first printing head is oriented along the vertical direction, and when the mounting plate is in the second position, the second printing head is oriented along the vertical direction.

3. The printhead device of claim 2,

the drive mechanism includes a switching gear, the mounting plate includes an engagement portion that engages with the switching gear, and the switching gear is configured to rotate the mounting plate about the horizontal axis through the engagement portion under drive of a power source.

4. The printhead device of claim 3,

the mounting plate includes a circular arc-shaped portion having a plurality of gear teeth formed at an edge thereof as the engaging portion.

5. The printhead device of claim 2,

the driving mechanism includes a rotating shaft connected with the mounting plate and having an axis as a horizontal axis, the rotating shaft being configured to rotate the mounting plate about the horizontal axis under the driving of a power source.

6. The printhead device of claim 1,

the mounting plate can translate relative to the fixed seat,

the driving mechanism is used for driving the mounting plate to translate so as to switch between the first position and the second position.

7. A print head device according to any one of claims 1 to 6,

the first extruder comprises a first driving gear, a first driven gear, a first roller and a second roller, the first driving gear is coaxially and fixedly connected with the first roller, the first driven gear is coaxially and fixedly connected with the second roller, the first driving gear is meshed with the first driven gear, and the first roller and the second roller are used for clamping and extruding a material line in the first printing head; the first drive gear is in engagement with the printhead gear when the mounting plate is in the first position;

the second extruder comprises a second driving gear, a second driven gear, a third roller and a fourth roller, the second driving gear is coaxially and fixedly connected with the third roller, the second driven gear is coaxially and fixedly connected with the fourth roller, the second driving gear is meshed with the second driven gear, and the third roller and the fourth roller are used for clamping and extruding a material line in the second printing head; the second drive gear engages the print head gear when the mounting plate is in the second position.

8. The printhead device of claim 7,

the first idler wheel is positioned on one side of the first driving gear, which is back to the mounting plate, and the second idler wheel is positioned on one side of the first driven gear, which is back to the mounting plate;

the third roller is located on one side, back to the mounting plate, of the second driving gear, and the fourth roller is located on one side, back to the mounting plate, of the second driven gear.

9. A printhead arrangement according to any of claims 1 to 6, further comprising:

the fixing seat is connected to the horizontal guide rod in a sliding mode.

10. A3D printer, comprising: a printhead arrangement according to any of claims 1 to 9.

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