Consumable conveying device of printing equipment

Abstract

The utility model discloses a consumable conveying device of printing equipment. The consumable conveying device comprises a nozzle assembly, a conveying assembly, a push rod and a discharging assembly. The nozzle assembly is provided with a conveying channel used for conveying consumables. The push rod is in transmission connection with the discharging assembly, the conveying assembly is in transmission connection with the discharging assembly, and the discharging assembly is used for driving the push rod to move in the extending direction of the conveying channel. The material conveying assembly has a first working state for driving the consumables to be close to the nozzle assembly and a second working state for driving the consumables to be away from the nozzle assembly. When the conveying assembly is in the first working state, the discharging assembly drives the push rod to retreat from the conveying channel in the extending direction of the conveying channel and be away from the nozzle assembly. When the conveying assembly is in the second working state, the discharging assembly drives the push rod to approach the nozzle assembly in the extending direction of the conveying channel and enter the conveying channel so as to extrude residual consumables in the conveying channel. In this way, waste of consumables during cleaning of the residual consumables in the printing equipment can be reduced.

Description

Technical Field

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

[0002] 3D printing equipment, also known as three-dimensional printing equipment, can generally be based on digital model files, use plastic and other consumables, and print layer by layer to produce three-dimensional objects corresponding to the digital model.

[0003] Among them, 3D printing equipment generally outputs consumables through a nozzle assembly. With the development of technology, some 3D printing equipment can realize the printing of three-dimensional objects with more than two colors or colorful three-dimensional objects. In the process of realizing the above-mentioned colorful three-dimensional object printing, the printing equipment often needs to replace consumables of different colors. In the process of replacing consumables, some residual consumables often remain in the nozzle assembly, so that when new consumables of different colors are extruded, the new consumables and the residual consumables are mixed together, affecting the printing effect and increasing the waste of consumables. Utility Model Content

[0004] The present application provides a consumables conveying device for a printing device, which can reduce the waste of consumables generated during the process of replacing consumables of different colors.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a consumable material conveying device of a printing device, comprising: a nozzle assembly, a material feeding assembly, a push rod and a discharge assembly. The nozzle assembly is provided with a conveying channel for conveying consumable materials. The push rod is transmission-connected to the discharge assembly, and the material feeding assembly is transmission-connected to the discharge assembly, and the discharge assembly is used to drive the push rod to move along the extension direction of the conveying channel. The material feeding assembly has a first working state for driving the consumable material to approach the nozzle assembly, and a second working state for driving the consumable material to move away from the nozzle assembly. Among them, when the material feeding assembly is in the first working state, the discharge assembly drives the push rod to exit the conveying channel and move away from the nozzle assembly along the extension direction of the conveying channel. When the material feeding assembly is in the second working state, the discharge assembly drives the push rod to approach the nozzle assembly and enter the conveying channel along the extension direction of the conveying channel to squeeze out the residual consumable material in the conveying channel.

[0006] The beneficial effect of the present application is that, different from the related art, the residual consumables in the nozzle assembly can be easily pushed out by the discharge assembly and the push rod, so that the device can support multiple types of consumables. In addition, the use of the discharge assembly and the push rod to push out the residual consumables before the new consumables enter can also reduce the risk of mixing the residual consumables with the new consumables, and further reduce the possibility of the new consumables being wasted due to the mixing of the residual consumables with the new consumables, thereby improving the processing effect. By setting the feeding assembly to drive the discharge assembly to work, the motor of the feeding assembly can be used to transmit the consumables and the push rod separately. The discharge assembly does not need to be separately provided with a motor to drive the push rod, thereby reducing the number of motors arranged in the printing device, saving the cost of the motor, optimizing the internal structure of the printing device, reducing the weight of the consumables conveying device, that is, reducing the weight of the nozzle of the printing device, which is conducive to improving the running speed, running stability and printing accuracy of the nozzle assembly, thereby improving the printing effect of the printing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of an embodiment of the consumable material conveying device of the present application;

[0008] Figure 2 2 is a schematic diagram of the structure of the first conveying roller and the second conveying roller involved in the embodiment of the consumable material conveying device of the present application;

[0009] Figure 3 It is a structural schematic diagram of a material conveying assembly involved in an embodiment of a consumable material conveying device of the present application;

[0010] Figure 4 It is a structural schematic diagram of a base involved in an embodiment of the consumable material conveying device of the present application;

[0011] Figure 5 yes Figure 4 Schematic diagram of the explosion structure;

[0012] Figure 6 It is a structural schematic diagram of a push rod assembly involved in an embodiment of the consumable material conveying device of the present application;

[0013] Figure 7 It is a structural schematic diagram of a first driving gear driven by a feeding assembly involved in an embodiment of a consumable material conveying device of the present application;

[0014] Figure 8 It is a schematic diagram of the structure of the rack involved in the embodiment of the consumable material conveying device of the present application;

[0015] Fig. 9 It is a structural schematic diagram of the second driving gear driven by the feeding component involved in the embodiment of the consumable material conveying device of the present application.

[0016] 1 consumables conveying device; 100 nozzle assembly; 101 conveying channel; 110 throat; 120 nozzle; 130 heater; 140 radiator;

[0017] 200 feeding assembly; 210 first conveying roller; 211 first guide groove; 212 first synchronous gear; 220 second conveying roller; 221 second guide groove; 222 second synchronous gear;

[0018] 230 driving motor; 240 reduction gear set; 241 first gear; 242 second gear; 243 third gear;

[0019] 250 base; 250a first assembly; 250b second assembly; 251 feeding channel; 2511 feeding section; 2512 connecting section; 252 discharging channel; 253 guiding channel; 255 first groove; 256 second groove;

[0020] 310 push rod; 311 first rack; 312 empty tooth segment; 313 second rack;

[0021] 320 discharge assembly; 321 first drive gear; 322 second drive gear; 331 first transmission gear; 332 first transmission shaft; 341 second transmission gear; 342 second transmission shaft; 343 one-way bearing;

[0022] 400: cutting mechanism; 410: cutting knife; 420: elastic member. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0024] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0025] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0026] 3D printing equipment generally includes a consumable conveying device and a hot bed. Among them, the hot bed mainly plays a bearing role. The consumable conveying device can heat the solid consumable to a molten state, and further extrude and coat it on the hot bed for shaping to form a processing layer. After completing the shaping of at least one layer of the processing layer, the molten consumable can be coated on the shaped processing layer, and when the molten consumable is shaped, it can be firmly connected to the previous processing layer. Repeat the above steps, and the production of three-dimensional objects can be completed by printing layer by layer.

[0027] The consumable material conveying device can be further described in the following consumable material conveying device embodiment. The following consumable material conveying device embodiment of the present application describes an exemplary structure of the consumable material conveying device.

[0028] The present application provides a consumable material conveying device of a printing device, including: a nozzle assembly, a feed assembly, a push rod and a discharge assembly. The nozzle assembly is provided with a conveying channel for conveying consumable materials. The push rod is transmission-connected to the discharge assembly, and the feed assembly is transmission-connected to the discharge assembly, and the discharge assembly is used to drive the push rod to move along the extension direction of the conveying channel. The feed assembly has a first working state for driving the consumable material to approach the nozzle assembly, and a second working state for driving the consumable material away from the nozzle assembly. Among them, when the feed assembly is in the first working state, the discharge assembly drives the push rod to exit the conveying channel and move away from the nozzle assembly along the extension direction of the conveying channel. When the feed assembly is in the second working state, the discharge assembly drives the push rod to approach the nozzle assembly and enter the conveying channel along the extension direction of the conveying channel to squeeze out the residual consumable material in the conveying channel.

[0029] The beneficial effect of the present application is that, unlike the related art, the residual consumables in the nozzle assembly can be conveniently pushed out by the discharge assembly and the push rod, so that the device can support multiple types of consumables. In addition, the use of the discharge assembly and the push rod to push out the residual consumables before the new consumables enter can also reduce the risk of the residual consumables and the new consumables mixing, and further reduce the possibility of the new consumables being wasted due to the mixing of the residual consumables and the new consumables, thereby improving the printing effect.

[0030] See also Figure 1The present application provides a consumable material conveying device 1 of a printing device, including a nozzle assembly 100, a material feeding assembly 200, a push rod 310 and a material discharge assembly 320. The nozzle assembly 100 is provided with a conveying channel 101 for conveying consumable materials. The push rod 310 is transmission-connected with the material discharge assembly 320, and the material feeding assembly 200 is transmission-connected with the material discharge assembly 320, and the material discharge assembly 320 is used to drive the push rod 310 to move along the extension direction of the conveying channel 101. The material feeding assembly 200 has a first working state in which the consumable material is driven to approach the nozzle assembly 100, and a second working state in which the consumable material is driven to move away from the nozzle assembly 100. Among them, when the material feeding assembly 200 is in the first working state, the material discharge assembly 320 drives the push rod 310 to exit the conveying channel 101 and move away from the nozzle assembly 100 along the extension direction of the conveying channel 101. The feeding assembly 200 is in the second working state, and the discharging assembly 320 drives the push rod 310 to approach the nozzle assembly 100 along the extension direction of the conveying channel 101 and enter the conveying channel 101 to squeeze out the residual consumables in the conveying channel 101 .

[0031] The beneficial effect of the present application is that, different from the related art, the residual consumables in the nozzle assembly 100 can be conveniently pushed out by the discharge assembly 320 and the push rod 310, so that the device can support multiple consumables. In addition, the use of the discharge assembly 320 and the push rod 310 to push out the residual consumables before the new consumables enter can also reduce the risk of mixing the residual consumables with the new consumables, and further reduce the possibility of the new consumables being wasted due to the mixing of the residual consumables with the new consumables. By setting the feeding assembly 200 to drive the discharge assembly 320 to work, the motor of the feeding assembly 200 can be used to realize the transmission of the consumables and the push rod 310 respectively, and the discharge assembly 320 does not need to be separately set up with a motor to drive the push rod 310, thereby reducing the number of motors arranged in the printing device, saving the cost of the motor, optimizing the internal structure of the printing device, reducing the weight of the consumable conveying device 1, that is, reducing the weight of the nozzle of the printing device, which is conducive to improving the running speed, running stability and printing accuracy of the nozzle assembly 100, thereby improving the printing effect of the printing device.

[0032] In some embodiments, the nozzle assembly 100 is provided with a conveying channel 101 for conveying consumables. The feeding assembly 200 has a first working state and a second working state, and is used to drive the consumables into the conveying channel 101 and move outward along the conveying channel 101 for extrusion in the first working state, and not to introduce consumables into the conveying channel 101 in the second working state. The discharge assembly 320 is used to drive the residual consumables in the conveying channel 101 to move outward along the conveying channel 101 for extrusion in the second working state of the feeding assembly 200. The feeding assembly 200 and the discharge assembly 320 are connected in a transmission manner, and the feeding assembly 200 is used to drive the discharge assembly 320 to separate from the consumables in the conveying channel 101 in the first working state, and drive the discharge assembly 320 in the second working state, so that the discharge assembly 320 drives the residual consumables in the conveying channel 101 to move along the conveying channel 101.

[0033] According to one or more embodiments of the present application, the nozzle assembly 100 may include a throat 110, a nozzle 120, and a heater 130. The throat 110 and the nozzle 120 may be provided with the above-mentioned delivery channel 101. The heater 130 may be disposed at the nozzle 120 to heat the solid consumable inside the nozzle 120 into a molten state. The consumables in the nozzle assembly 100 may be sequentially extruded or pushed through the throat 110 and the delivery channel 101 of the nozzle 120. In addition, the nozzle assembly 100 may further include a radiator 140 sleeved outside the throat 110. The radiator 140 can reduce the temperature of the consumables located in the throat 110 and reduce the risk of the consumables melting in the throat 110.

[0034] See also Figure 1 and Figure 2 According to one or more embodiments of the present application, the feeding assembly 200 can realize the feeding of consumables by a pair of rollers. For example, the feeding assembly 200 may include a rotatable first feeding roller 210 and a second feeding roller 220. The rotation axis of the first feeding roller 210 is parallel to the rotation axis of the second feeding roller 220. The first feeding roller 210 and the second feeding roller 220 are arranged at intervals so that the consumables can be clamped between the first feeding roller 210 and the second feeding roller 220.

[0035] When the filamentary consumables or the strip-shaped consumables are clamped between the first conveying roller 210 and the second conveying roller 220, at least one of the first conveying roller 210 and the second conveying roller 220 can be driven to rotate to drive the filamentary consumables or the strip-shaped consumables to move toward the nozzle assembly 100, so as to feed the nozzle assembly 100. In addition, by controlling the rotation angle of the first conveying roller or the second conveying roller 220, the length of the feeding can be further accurately controlled.

[0036] According to one or more embodiments of the present application, a first guide groove 211 is provided on the cylindrical surface of the first conveying roller 210. The first guide groove 211 extends around the rotation axis of the first conveying roller 210 or extends along the circumference of the first conveying roller 210. A second guide groove 221 is provided on the cylindrical surface of the second conveying roller 220. The second guide groove 221 extends around the rotation axis of the second conveying roller 220 or extends along the circumference of the second conveying roller 220. The first guide groove 211 and the second guide groove 221 face each other so that the consumables can be clamped between the first guide groove 211 and the second guide groove 221. In this case, the risk of the filamentary consumables or the strip-shaped consumables being offset along the axial movement of the first conveying roller 210 / the second conveying roller 220, or even detaching from the gap between the first conveying roller 210 and the second conveying roller 220, which leads to the inability to unload the materials, can be reduced during the feeding process.

[0037] According to one or more embodiments of the present application, the groove wall of the first guide groove 211 and / or the second guide groove 221 may be provided with knurled grooves. In this way, the friction between the first guide groove 211, the second guide groove 221 and the consumables can be further increased, and the possibility of the consumables slipping during feeding can be reduced, which is conducive to accurately controlling the length of the feeding during feeding.

[0038] See also Figure 3 According to one or more embodiments of the present application, the feeding assembly 200 includes a first synchronous gear 212 and a second synchronous gear 222. The first synchronous gear 212 and the first conveying roller 210 are coaxially fixedly arranged. The second synchronous gear 222 and the second conveying roller 220 are coaxially fixedly arranged. The first synchronous gear 212 and the second synchronous gear 222 are meshed. The feeding assembly 200 includes a driving motor 230, which is used to drive the first synchronous gear 212 and the second synchronous gear 222 to rotate, thereby driving the first conveying roller 210 and the second conveying roller 220 to rotate.

[0039] When the linear speeds of the first conveying roller 210 and the second conveying roller 220 are the same, it is beneficial for the material feeding assembly 200 to stably discharge the material. In some specific embodiments, the number of teeth of the first synchronous gear 212 and the second synchronous gear 222 can be the same, and the diameters of the first conveying roller 210 and the second conveying roller 220 can be the same. This means that the angular velocity and linear velocity of the first synchronous gear 212 and the second synchronous gear 222 when rotating are the same; at the same time, the rotation speeds of the first conveying roller 210 and the second conveying roller 220 are also the same.

[0040] According to one or more embodiments of the present application, the first synchronous gear 212 and the first conveying roller 210 are integrally formed. The second synchronous gear 222 and the second conveying roller 220 are integrally formed. In this case, the assembly of the feeding assembly 200 is facilitated.

[0041] See also Figure 3 According to one or more embodiments of the present application, the feeding assembly 200 further includes a reduction gear set 240. The driving motor 230 is connected to the first synchronous gear 212 or the second synchronous gear 222 via the reduction gear set 240. The reduction gear set 240 may include a first gear 241, a second gear 242, and a third gear 243. Among them, the first gear 241 may be disposed on the output shaft of the driving motor 230 to rotate under the drive of the driving motor 230. The second gear 242 and the third gear 243 may be coaxially fixedly disposed so that the second gear 242 and the third gear 243 can rotate at the same angular velocity. The second gear 242 is configured to mesh with the first gear 241, and the third gear 243 is configured to mesh with the first synchronous gear 212 or the second synchronous gear 222. The number of teeth of the second gear 242 may be greater than the number of teeth of the first gear 241, so that the angular velocity of the second gear 242 is less than the angular velocity of the first gear 241; the number of teeth of the third gear 243 may be less than the number of teeth of the second gear 242, so that the linear velocity of the third gear 243 is less than the linear velocity of the second gear 242. In other embodiments, the feeding assembly 200 may not include the reduction gear set 240, that is, the driving motor 230 may directly drive the first synchronous gear 212 or the second synchronous gear 222.

[0042] See also Figure 4 , Figure 5 and Figure 6 According to one or more embodiments of the present application, the feeding assembly 200 may further include a base 250. The base 250 may be used to connect the nozzle assembly 100. The base 250 may be provided with an inlet channel 251 and an outlet channel 252. The first conveying roller 210 and the second conveying roller 220 may drive the filamentary consumables or the strip-shaped consumables to sequentially pass through the inlet channel 251 and the outlet channel 252 of the base 250 to move toward the nozzle assembly 100, so as to feed the nozzle assembly 100. In this case, the filamentary consumables or the strip-shaped consumables can be guided to move toward the nozzle assembly 100 through the inlet channel 251 and the outlet channel 252 of the base 250, thereby reducing the possibility of bending or winding of the consumables during the feeding process.

[0043] See also Figure 6According to one or more embodiments of the present application, the push rod 310 is connected to the discharge assembly 320 by transmission. The discharge assembly 320 is used to drive the push rod 310 to exit the conveying channel 101 or enter the conveying channel 101 to push the residual consumables to move. The push rod 310 can move along the conveying channel 101 to squeeze out the residual consumables or extract them from the conveying channel 101. In this case, when it is necessary to replace the consumables and squeeze out the residual consumables in the nozzle 120, the discharge assembly 320 can push the push rod 310 to squeeze out the residual consumables. After the residual consumables are squeezed out, the push rod 310 can leave the conveying channel 101 to facilitate the entry of new consumables into the nozzle 120.

[0044] See also Figure 4 and Figure 5 According to one or more embodiments of the present application, the discharge assembly 320 may be disposed on the base 250. Specifically, the push rod 310 may be movably mounted on the discharge assembly 320. The base 250 is provided with an inlet channel 251, an outlet channel 252, and a guide channel 253. The inlet channel 251 and the guide channel 253 are respectively connected to the outlet channel 252. The outlet channel 252 is connected to the conveying channel 101. The feed assembly 200 is used to pass the consumables into the conveying channel 101 through the inlet channel 251 and the outlet channel 252. The push rod 310 is used to enter the conveying channel 101 through the guide channel 253 and the outlet channel 252, and to exit from the conveying channel 101 to the guide channel 253 or exit from the guide channel 253.

[0045] When the push rod 310 needs to squeeze out the residual consumables in the conveying channel 101, the push rod 310 can enter the conveying channel 101 through the guide channel 253 and the discharge channel 252, and further squeeze out the residual consumables in the conveying channel 101. After the residual consumables in the conveying channel 101 are squeezed out, the push rod 310 can withdraw from the conveying channel 101 and the discharge channel 252 and move to the guide channel 253, or even further leave the guide channel 253, so that new consumables can enter the conveying channel 101 of the nozzle assembly 100 through the feed channel 251 and the discharge channel 252.

[0046] Optionally, the guide channel 253, the discharge channel 252 and the conveying channel 101 are arranged to extend in the same direction. In this case, the push rod 310 can be easily moved along the guide channel 253, the discharge channel 252 and the output channel, reducing the possibility of the push rod 310 getting stuck during the movement.

[0047] According to one or more embodiments of the present application, the feed channel 251 and the discharge channel 252 are arranged to diverge from each other. That is, the extension directions of the feed channel 251 and the discharge channel 252 may be different. In some embodiments, the feed channel 251 includes a feed section 2511 and a connecting section 2512 that are connected to each other. The feed section 2511 and the connecting section 2512 are not arranged in a colinear manner, and the feed section 2511 and the discharge channel 252 are extended in the same direction. The connecting section 2512 can be used to connect the discharge channel 252 and the feed section 2511. Further, the feed section 2511 can be aligned with the first guide groove 211 and the second guide groove 221, and the discharge channel 252 can be aligned with the conveying channel 101 of the nozzle assembly 100.

[0048] See also Figure 5 According to one or more embodiments of the present application, the base 250 includes a first assembly 250a and a second assembly 250b. The first assembly 250a is provided with a first groove 255. The second assembly 250b is provided with a second groove 256. The first groove 255 and the second groove 256 are combined to form a guide channel 253, a feed channel 251 and a discharge channel 252. In this case, it is convenient to process the guide channel 253, the feed channel 251 and the discharge channel 252. In addition, when the feed assembly 200 fails, it can also be dismantled and repaired.

[0049] See also Figure 1 According to one or more embodiments of the present application, the consumable material conveying device 1 further includes a cutter mechanism 400. The cutter mechanism 400 is disposed on the nozzle assembly 100, and is used to cut off the consumable material at the inlet of the conveying channel 101 when the feeding assembly switches from the first working state to the second working state, thereby leaving residual consumable material in the conveying channel 101.

[0050] That is, when the consumables need to be replaced, the consumables can be cut by the cutter mechanism 400 to be divided into the consumables to be recycled in the feeding assembly 200 and the residual consumables in the nozzle assembly 100. The consumables to be recycled can be recycled to reduce the waste of consumables. The residual consumables can be squeezed out by the push rod 310.

[0051] According to one or more embodiments of the present application, the cutter mechanism 400 includes a cutter 410 and an elastic member 420. The cutter 410 is disposed between the nozzle assembly 100 and the feed assembly 200 to cut off the consumables. The elastic member 420 is used to drive the cutter 410 to reset after the cutter 410 cuts off the consumables. The elastic member 420 can be a spring, which can be disposed on the base 250 or on other relatively fixed devices in the process of cutting the consumables and connected to the cutter 410, so that the cutter 410 deforms and stores energy when the cutter 410 cuts off the consumables, and releases energy to reset the cutter 410 after the consumables are cut off. In this case, the consumables can be divided into two parts after being cut, one part is located in the conveying channel 101 of the nozzle assembly 100, and the other part is located in the feed assembly 200. The push rod 310 can further squeeze out the consumables located in the conveying channel 101 conveniently and efficiently.

[0052] According to one or more embodiments of the present application, the feeding assembly 200 and the discharge assembly 320 are connected by transmission. For example, the feeding assembly 200 can drive the discharge assembly 320 and the consumables in the conveying channel 101 to separate from each other in the first working state; and drive the discharge assembly 320 in the second working state, so that the discharge assembly 320 drives the residual consumables in the conveying channel 101 to move along the conveying channel 101. In this case, compared with the feeding assembly 200 and the discharge assembly 320 being driven by independent motors, a certain cost can be saved.

[0053] See also Figure 7 , Figure 8 and Fig. 9 According to one or more embodiments of the present application, the push rod 310 is connected to the discharge assembly 320. The feeding assembly 200 is connected to the discharge assembly 320. The discharge assembly 320 is used to drive the push rod 310 to exit the conveying channel 101 or enter the conveying channel 101 under the drive of the feeding assembly 200 to push the residual consumables to move.

[0054] See also Figure 7 According to one or more embodiments of the present application, the discharge assembly 320 includes a first driving gear 321. The push rod 310 is provided with a first rack 311 meshed with the first driving gear 321. In this case, when the push rod 310 drives the first driving gear 321 to rotate, the first rack 311 meshed therewith can be driven to perform linear motion, thereby driving the push rod 310 to perform linear motion along the conveying channel 101.

[0055] According to one or more embodiments of the present application, the first driving gear 321 is in transmission connection with the feeding assembly 200. The feeding assembly 200 is used to drive the first driving gear 321 to rotate, thereby driving the push rod 310 to move through the first rack 311, so as to exit the conveying channel 101 or enter the conveying channel 101 to push the residual consumables to move. For example, the first synchronous gear 212 and / or the second synchronous gear 222 of the feeding assembly 200 can drive the first driving gear 321 to rotate through a transmission mechanism.

[0056] See also Figure 8 According to one or more embodiments of the present application, the push rod 310 has a terminal end that first enters the delivery channel 101 when entering the delivery channel 101 or that last exits the delivery channel 101 when exiting the delivery channel 101. The push rod 310 is provided with an empty tooth segment 312 arranged in line with the first rack 311. The empty tooth segment 312 is closer to the nozzle assembly 100 than the first rack 311. In other words, the empty tooth segment 312 is closer to the terminal end than the first rack 311. The first driving gear 321 is used to switch from meshing with the first rack 311 to the empty tooth segment 312 when the push rod 310 exits the delivery channel 101, so as to be able to idle in the empty tooth segment 312 and keep the push rod 310 outside the delivery channel 101.

[0057] The empty tooth segment 312 can also be understood as a portion without a rack in the push rod 310. The first driving gear 321 can push the push rod 310 to move through the meshing structure of the gear and rack during the rotation process, until the push rod 310 moves to a preset position (for example, remains outside the conveying channel 101), the first driving gear 321 and the first rack 311 separate and move to the area where the empty tooth segment 312 is located, so that the first driving gear 321 can no longer drive the push rod 310 to move.

[0058] See also Fig. 9 According to one or more embodiments of the present application, the discharge assembly 320 includes a second drive gear 322. The push rod 310 is provided with a second rack 313 meshing with the second drive gear 322. The second drive gear 322 is connected to the feed assembly 200 in a one-way transmission manner. The feed assembly 200 is used to synchronously drive the first drive gear 321 and the second drive gear 322 to rotate in the second working state, so as to simultaneously drive the push rod 310 to enter the conveying channel 101; the feed assembly 200 is also used to drive the first drive gear 321 to rotate in the first working state without driving the second drive gear 322 to rotate; the second drive gear 322 can be driven to rotate by the push rod 310 exiting the conveying channel 101 when the feed assembly 200 is in the first working state.

[0059] According to one or more embodiments of the present application, the length of the first rack 311 is smaller than the length of the second rack 313, so that after the push rod 310 exits the conveying channel 101, the first drive gear 321 and the first rack 311 are separated, while the second drive gear 322 and the second rack 313 remain engaged.

[0060] Since the second driving gear 322 and the feeding assembly 200 are connected in a one-way transmission manner, the feeding assembly 200 can drive the first rack 311 and the push rod 310 to exit the conveying channel 101 through the first driving gear 321 without transmitting the second driving gear 322. The second driving gear 322 only rotates under the drive of the second rack 313 of the push rod 310. Therefore, when the first driving gear 321 and the first rack 311 separate and move to the empty tooth section 312, the push rod 310 no longer moves and the second driving gear 322 no longer rotates.

[0061] The feeding assembly 200 can unidirectionally drive the second driving gear 322 to drive the second rack 313 and the push rod 310 to move toward the direction of entering the conveying channel 101. As described above, after driving the push rod 310 to exit the conveying channel 101, the first driving gear 321 will separate from the first rack 311. Before the first rack 311 and the first driving gear 321 are meshed, the feeding assembly 200 cannot drive the push rod 310 to rotate through the first driving gear 321, but should use the meshing relationship between the second driving gear 322 and the second rack 313 to drive the push rod 310 to move toward the direction of entering the conveying channel 101 through the second driving gear 322. At the same time, the first driving gear 321 and the first rack 311 can also be re-engaged, and drive the push rod 310 to enter the conveying channel 101 together.

[0062] According to one or more embodiments of the present application, the discharge assembly 320 may include a first transmission gear 331 and a first transmission shaft 332. The first transmission gear 331 may be transmission-connected to the feed assembly 200. For example, the first transmission gear 331 may mesh with the first synchronization gear 212. The first transmission gear 331 and the first drive gear 321 are coaxially connected via the first transmission shaft 332. In the above manner, the first drive gear 321 and the first transmission gear 331 are coaxially fixedly arranged on the first transmission shaft 332, so that when the first transmission gear 331 rotates, the first drive gear 321 is driven to rotate synchronously.

[0063] According to one or more embodiments of the present application, the discharge assembly 320 may further include a second transmission gear 341, a second transmission shaft 342, and a one-way bearing 343. The second transmission gear 341 may be transmission-connected to the feed assembly 200. For example, the second transmission gear 341 may mesh with the second synchronization gear 222. The second transmission gear 341 and the second drive gear 322 are coaxially connected through the second transmission shaft 342. The second transmission gear 341 or the second drive gear 322 is coaxially connected to the one-way bearing 343, so that the second drive gear 322 and the feed assembly 200 are one-way transmission-connected. The feed assembly 200 is used to synchronously drive the first transmission gear 331 and the second transmission gear 341 to rotate in the first working state and the second working state, respectively.

[0064] Among them, the one-way bearing 343 can also be called an overrunning clutch. Compared with ordinary bearings that can rotate freely in both clockwise and counterclockwise directions, the one-way bearing 343 can only rotate in one direction and is locked in the other direction.

[0065] In a specific embodiment, the second transmission gear 341 may be disposed on the second transmission shaft 342 via a one-way bearing 343. When the second synchronous gear 222 drives the second transmission gear 341 to rotate clockwise, the one-way bearing 343 may be in a locked state. In this case, the second transmission shaft 342 and the second driving gear 322 disposed on the second transmission shaft 342 may rotate clockwise driven by the second synchronous gear 222, and further drive the push rod 310 to enter the conveying channel 101 via the second rack 313.

[0066] When the second synchronous gear 222 drives the second transmission gear 341 to rotate counterclockwise, the one-way bearing 343 can be in a rotatable state. In other words, when the second synchronous gear 222 rotates counterclockwise, the second transmission shaft 342 and the second driving gear 322 disposed on the second transmission shaft 342 are in a free state and can rotate or remain stationary. In addition, as described above, when the push rod 310 exits the conveying passage 101, the second rack 313 can drive the second driving gear 322 and the second transmission shaft 342 in a free state to rotate counterclockwise.

[0067] In another specific embodiment, the second driving gear 322 may be disposed on the second transmission shaft 342 via a one-way bearing 343. When the second synchronous gear 222 drives the second transmission gear 341 and the second transmission shaft 342 to rotate clockwise, the one-way bearing 343 may be in a locked state. In this case, the second driving gear 322 will rotate clockwise driven by the second transmission shaft 342, and further drive the push rod 310 to enter the conveying channel 101 via the second rack 313.

[0068] When the second synchronous gear 222 drives the second transmission gear 341 and the second transmission shaft 342 to rotate counterclockwise, the one-way bearing 343 can be in a rotatable state. In other words, when the second synchronous gear 222 and the second transmission shaft 342 rotate counterclockwise, the second driving gear 322 can be in a free state, and can rotate or remain stationary. In addition, as described above, when the push rod 310 exits the conveying channel 101, the second rack 313 can drive the second driving gear 322 in a free state to rotate counterclockwise.

[0069] In summary, the consumable material conveying device 1 of the printing device provided in the present application includes: a nozzle assembly 100, a feed assembly 200, a push rod 310 and a discharge assembly 320; the nozzle assembly 100 is provided with a conveying channel 101 for conveying consumables outward; the feed assembly 200 has a first working state and a second working state, and is used to drive the consumables into the conveying channel 101 and move outward along the conveying channel 101 for extrusion in the first working state, and not to introduce consumables into the conveying channel 101 in the second working state; the discharge assembly 320 is used to drive the residual consumables in the conveying channel 101 to move outward along the conveying channel 101 for extrusion in the second working state when the feed assembly 200 is in the second working state.

[0070] Different from the related art, the residual consumables in the nozzle assembly 100 can be conveniently pushed out by the discharge assembly 320 and the push rod 310, so that the device can support multiple consumables. In addition, the use of the discharge assembly 320 and the push rod 310 to push out the residual consumables before the new consumables enter can also reduce the risk of the residual consumables and the new consumables mixing, and further reduce the possibility of the new consumables being wasted due to the residual consumables and the new consumables mixing.

[0071] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A consumables conveying device for a printing device, characterized in that: include: Nozzle assembly, feed assembly, push rod and discharge assembly, The nozzle assembly is provided with a conveying channel for conveying consumables; The push rod is in transmission connection with the discharge assembly, the feeding assembly is in transmission connection with the discharge assembly, and the discharge assembly is used to drive the push rod to move along the extension direction of the conveying channel; The feeding assembly has a first working state of driving the consumable material close to the nozzle assembly, and a second working state of driving the consumable material away from the nozzle assembly; Among them, when the feeding assembly is in the first working state, the discharge assembly drives the push rod to exit the conveying channel along the extension direction of the conveying channel and away from the nozzle assembly; when the feeding assembly is in the second working state, the discharge assembly drives the push rod to approach the nozzle assembly and enter the conveying channel along the extension direction of the conveying channel to squeeze out the residual consumables in the conveying channel.

2. The consumable material conveying device according to claim 1, characterized in that: The discharge assembly includes a first driving gear, and the push rod is provided with a first rack meshing with the first driving gear; the first driving gear is transmission-connected to the feeding assembly, and the feeding assembly is used to drive the first driving gear to rotate, thereby driving the push rod to move through the first rack to exit the conveying channel or enter the conveying channel.

3. The consumable material conveying device according to claim 2, characterized in that: The push rod is provided with an empty tooth segment arranged in alignment with the first rack; the empty tooth segment is closer to the nozzle assembly than the first rack; the first driving gear is used to switch from meshing with the first rack to the empty tooth segment when the push rod exits the conveying channel, so as to be able to idle in the empty tooth segment and keep the push rod outside the conveying channel.

4. The consumable material conveying device according to claim 3, characterized in that: The discharge assembly includes a second driving gear, and the push rod is provided with a second rack meshing with the second driving gear; the second driving gear is connected to the feeding assembly in a one-way transmission manner; the feeding assembly is used to synchronously drive the first driving gear and the second driving gear to rotate in the second working state, so as to simultaneously drive the push rod to enter the conveying channel; the feeding assembly is also used to drive the first driving gear to rotate without driving the second driving gear to rotate in the first working state; the second driving gear can be driven to rotate by the push rod exiting the conveying channel when the feeding assembly is in the first working state.

5. The consumable material conveying device according to claim 4, characterized in that: The discharge assembly includes a first transmission gear, a first transmission shaft, a second transmission gear, a second transmission shaft and a one-way bearing. The first transmission gear and the second transmission gear are respectively connected to the feeding assembly in a transmission manner. The first transmission gear and the first drive gear are coaxially connected via the first transmission shaft. The second transmission gear and the second drive gear are coaxially connected via the second transmission shaft. The second transmission gear is coaxially connected to the one-way bearing, so that the second drive gear and the feeding assembly are connected in a one-way transmission manner. The feeding assembly is used for synchronously driving the first transmission gear and the second transmission gear to rotate in the first working state and the second working state respectively.

6. The consumable material conveying device according to claim 4, characterized in that: The length of the first rack is smaller than that of the second rack, so that after the push rod exits the conveying passage, the first drive gear and the first rack are separated, while the second drive gear and the second rack remain meshed.

7. The consumable material conveying device according to claim 1, characterized in that: The feeding assembly includes a driving motor, and a rotatable first conveying roller and a second conveying roller. The driving motor is used to drive the first conveying roller and the second conveying roller to rotate; the rotation axis of the first conveying roller is parallel to the rotation axis of the second conveying roller; the first conveying roller and the second conveying roller are spaced apart so that the consumables can be clamped between the first conveying roller and the second conveying roller.

8. The consumable material conveying device according to claim 1, characterized in that: The feeding assembly includes a base, the discharge assembly is arranged on the base, the base is connected to the nozzle assembly, the base is provided with a feed channel, a discharge channel and a guide channel, the feed channel and the guide channel are respectively connected with the discharge channel, and the discharge channel is connected with the conveying channel; the feeding assembly is used to pass the consumables into the conveying channel through the feed channel and the discharge channel; the push rod is used to enter the conveying channel through the guide channel and the discharge channel, exit from the conveying channel to the guide channel, or exit outside the guide channel.

9. The consumable material conveying device according to claim 8, characterized in that: The guide channel, the discharge channel and the conveying channel are arranged to extend in the same direction, and the feed channel and the discharge channel are arranged to branch off from each other.

10. The consumable material conveying device according to claim 1, characterized in that: The consumable material conveying device also includes a cutter mechanism, which is arranged on the nozzle assembly and is used to cut off the consumable material at the inlet of the conveying channel when the feeding assembly switches from the first working state to the second working state.

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