Feeding and discharging equipment and 3D printer

Abstract

The utility model provides feeding and discharging equipment and a 3D printer, the feeding and discharging equipment comprises a driving device, the driving device has a feeding state and a discharging state, and the driving device is configured to be used for extruding consumables in the feeding state and withdrawing the consumables in the discharging state; the transmission device is configured to be used for being connected with the matched raw material collecting and releasing device, and in the feeding state, transmission between the transmission device and the driving device is relieved; and in the material returning state, the transmission device is in transmission fit with the driving device so as to drive the raw material collecting and releasing device to collect the consumables. The feeding and discharging equipment can be driven to convey the consumables through the driving device, meanwhile, the raw material collecting and releasing device and the consumables can be driven to move synchronously, the power loss is small, the movement consistency of the raw material collecting and releasing device and the consumables can be ensured, and the feeding and discharging efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D (three-dimensional) printing technology, in particular to a feeding and withdrawing device and a 3D printer. BACKGROUND

[0002] A 3D printer, also known as a three-dimensional printer, is a kind of cumulative manufacturing technology, that is, a kind of machine of rapid prototyping technology. It is a kind of machine which uses special wax material, powdered metal or plastic and other materials that can be bonded to build three-dimensional objects through printing layer by layer. At present, three-dimensional printers are used to manufacture products. The technology of constructing objects layer by layer. The principle of a 3D printer is to put data and raw materials into a 3D printer, and the machine will build the product layer by layer according to the program.

[0003] FDM (Fused Deposition Modeling) process is a kind of printing method in 3D printing. The consumables used in FDM 3D printing are generally thermoplastic materials such as wax, ABS, nylon, etc., and the consumables are supplied in the form of filaments. The consumables are heated and melted in the nozzle, and the nozzle moves along the part section contour and filling track, while the melted consumables are extruded, and the consumables quickly solidify and coagulate with the surrounding materials.

[0004] The nozzle in FDM 3D printing is used to melt and extrude the consumables in a molten state. The solid filament consumables enter the nozzle under the action of external force and are heated and melted in the nozzle to become consumables in a molten state, and then are extruded from the outlet of the nozzle, layer by layer, to print a 3D model. During the 3D printing process, it is often necessary to switch between feeding and withdrawing conditions. At this time, the position is usually switched by using motor forward and reverse rotation to change the conveying direction of the consumables, so as to achieve the purpose of feeding or withdrawing. Since the consumables are generally stored in a raw material storage and retrieval device such as a tray, the raw material storage and retrieval device needs to move synchronously to release or store the consumables during feeding or withdrawing. Therefore, it is often necessary to configure an independent driving component for the raw material storage and retrieval device. However, too many driving components will result in large power loss, increase energy consumption, and it is difficult to ensure the consistency of the movement of the raw material storage and retrieval device and the consumables, affecting the feeding or withdrawing efficiency. UTILITY MODEL CONTENT

[0005] Therefore, it is necessary to provide a feeding and withdrawing device and a 3D printer in view of the above-mentioned technical problems.

[0006] The present application provides a feeding and withdrawing device, which comprises:

[0007] A driving device, the driving device has a feeding state and a withdrawing state, and the driving device is configured to extrude the consumables in the feeding state and withdraw the consumables in the withdrawing state;

[0008] a transmission device configured to be connected with a matched raw material feeding and winding device, the transmission device being disengaged from the driving device in the feeding state, and the transmission device being in driving engagement with the driving device in the discharging state to drive the raw material feeding and winding device to receive the consumable.

[0009] In one of the embodiments, the transmission device comprises a first transmission mechanism and a second transmission mechanism.

[0010] The first transmission mechanism is in driving engagement with the driving device.

[0011] The second transmission mechanism is configured to be disengaged from the first transmission mechanism in the feeding state, and to be in driving engagement with the first transmission mechanism in the discharging state to drive the raw material feeding and winding device to move.

[0012] In one of the embodiments, the second transmission mechanism comprises a first transmission assembly and a second transmission assembly.

[0013] The first transmission assembly is configured to be free to rotate relative to the first transmission mechanism in the feeding state, and to rotate synchronously with the first transmission mechanism in the discharging state.

[0014] The second transmission assembly is connected with the first transmission assembly, and is configured to rotate with the first transmission assembly to drive the raw material feeding and winding device to rotate and wind the consumable.

[0015] In one of the embodiments, the first transmission assembly comprises a first transmission shaft, a first transmission gear and an elastic member.

[0016] One end of the first transmission shaft is connected with one end of the elastic member, and the other end of the first transmission shaft is provided with a first connecting portion.

[0017] The first transmission gear is assembled on the first transmission shaft and is in engagement with the second transmission assembly.

[0018] The elastic member is configured to elastically connect the first connecting portion with the first transmission mechanism.

[0019] In one of the embodiments, the first transmission assembly further comprises a magnetic member.

[0020] The other end of the elastic member is connected with the magnetic member.

[0021] The magnetic member is configured to drive the first transmission shaft to move by magnetic force to connect or separate the first connecting portion from the first transmission mechanism.

[0022] In one of the embodiments, the first transmission mechanism comprises a transmission member having a second connecting portion, the transmission member is connected with the driving device;

[0023] The second connecting portion is configured to connect with the first connecting portion, in the feeding state, the transmission member is free to rotate relative to the first connecting portion, in the unloading state, the transmission member drives the first connecting portion to rotate synchronously.

[0024] In one of the embodiments, the driving device comprises a driving shaft, a first driving roller and a second driving roller, the first driving roller is connected with the driving shaft, the second driving roller is rotatably arranged, a conveying channel is formed between the first driving roller and the second driving roller;

[0025] The first driving roller is configured to rotate with the driving shaft to cooperate with the second driving roller to drive the consumable to be extruded or retracted.

[0026] In one of the embodiments, the driving shaft comprises a first driving section and a second driving section, the first driving section has a first connecting end, the second driving section is connected with the first driving roller, the second driving section has a second connecting end, the first connecting end and the second connecting end are configured to be connected to form a ratchet structure.

[0027] In one of the embodiments, the feeding and unloading device further comprises a monitoring assembly, the monitoring assembly is connected with the second driving roller, the monitoring assembly is configured to monitor the rotation state information of the second driving roller.

[0028] The present application provides a 3D printer, the 3D printer comprises:

[0029] A printing body for printing a model;

[0030] The feeding and unloading device as any one of the above is configured to convey or retract the consumable to the printing body.

[0031] In the aforementioned feeding and unloading equipment and 3D printer, during unloading, the drive unit is in the unloading state, and the transmission device and the material receiving and unloading device are in transmission cooperation. At this time, the drive unit provides power to drive the filament to move along the unloading direction, and also provides power to drive the material receiving and unloading device through the transmission device to synchronously collect the filament. During feeding, the drive unit is in the feeding state, and the transmission device and the material receiving and unloading device are disengaged. At this time, the drive unit only provides power to drive the filament to move along the feeding direction. Thus, the same power source, i.e., the drive unit, can drive the conveying of filament, and can also drive the material receiving and unloading device to move synchronously with the filament. Power loss is small, and the consistency of the movement of the material receiving and unloading device and the filament can be ensured, resulting in high feeding and unloading efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the feeding and unloading equipment and raw material receiving and discharging device provided in one embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the structure of a feeding and unloading device provided in one embodiment of this application.

[0034] Figure 3 This is a top view schematic diagram of a feeding and unloading device provided in one embodiment of this application.

[0035] Figure 4 For example Figure 3 The diagram shows a cross-sectional view of the feeding and unloading equipment along plane AA.

[0036] Figure 5 This is a schematic diagram of the transmission device provided in one embodiment of this application.

[0037] Figure 6 This is a schematic diagram illustrating the connection between a drive device and a transmission device according to one embodiment of this application.

[0038] Figure 7 This is a top view schematic diagram of a drive device and a transmission device provided in one embodiment of this application.

[0039] Figure 8 This is a side view of a drive device and a transmission device provided in one embodiment of this application.

[0040] Figure 9 For example Figure 8 The diagram shows a cross-sectional view of the drive unit and transmission unit along plane BB.

[0041] Figure 10 This is a schematic diagram showing the connection between the drive device and the transmission device according to another embodiment of this application.

[0042] Figure 11A top view schematic diagram of the driving device and transmission device provided for another embodiment of the present application.

[0043] Reference signs:

[0044] 100, feeding and withdrawing device; 200, raw material receiving and withdrawing device; 300, consumable;

[0045] 1000, driving device; 2000, transmission device; 4000, monitoring assembly; 5000, mounting assembly;

[0046] 1100, driving shaft; 1110, first driving section; 1111, first connecting end; 1120, second driving section; 1121, second connecting end; 1200, first driving roller; 1300, second driving roller; 1400, conveying channel; 1500, driving gear; 1600, motor; 1700, worm;

[0047] 2100, first transmission mechanism; 2110, transmission member; 2111, second connecting part; 2120, gear member; 2200, second transmission mechanism; 2210, first transmission assembly; 2211, first transmission shaft; 2211a, first connecting part; 2212, first transmission gear; 2213, elastic member; 2214, magnetic member; 2220, second transmission assembly; 2221, second transmission shaft; 2222, second transmission gear; 2223, roller;

[0048] 5100, base; 5200, raw material roller; 5300, mounting shell; 5400, material passing part; 5410, raw material hole; 5500, rotating shaft; 5600, compression spring; 5700, detection element;

[0049] 210, winding shaft; 220, winding disc. DETAILED DESCRIPTION

[0050] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and it is understood that similar modifications can be made by those skilled in the art in the light of the foregoing description. Therefore, the present application is not limited to the following disclosed specific embodiments.

[0051] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0052] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0054] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] It is to be noted that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can also be present. In addition, it will be understood that when a member such as a layer, region or substrate is referred to as being "formed on" or "connected to" another member, it can be directly formed on or connected to the other member or intervening members can also be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0056] The present application provides a 3D printer, which comprises a printing main body (not shown) for outputting a printing model and a feeding and withdrawing device 100 configured to realize feeding of a consumable 300 on a raw material receiving and releasing device 200 to the printing main body for printing operation or withdrawing of the consumable 300 from the printing main body and feeding of the consumable 300 to the raw material receiving and releasing device 200 for storage of the consumable 300 by the same power source, so as to reduce power loss and lower energy consumption while ensuring feeding or withdrawing efficiency. Figure 1 and Figure 2 As shown in the drawings, the feeding and withdrawing device 100 mentioned above comprises a driving device 1000 for driving the consumable 300 to move in a feeding direction to be separated from the raw material receiving and releasing device 200 or to move in a withdrawing direction to be stored on the raw material receiving and releasing device 200, and a transmission device 2000 for switching transmission cooperation state with the raw material receiving and releasing device 200 in a feeding state or a withdrawing state, respectively, and releasing transmission with the driving device 1000 in the feeding state and cooperating with the driving device 1000 in the withdrawing state to drive the raw material receiving and releasing device 200 to move and store the consumable 300, so that the driving device 1000 can drive the consumable 300 and the raw material receiving and releasing device 200 to move simultaneously, and the raw material receiving and releasing device 200 moves synchronously with the consumable 300, thereby reducing power loss and improving feeding and withdrawing efficiency.

[0057] In one of the embodiments, the raw material winding and unwinding device 200 comprises a winding shaft 210 configured to wind the consumable 300 and a winding disc 220 connected to the winding shaft 210 and protruding from the outer surface of the winding shaft 210 in the radial direction of the winding shaft 210, the winding disc 220 being configured to be in contact with the transmission device 2000. Thus, the driving device 1000 can drive the transmission device 2000 to move, thereby driving the winding disc 220 to move with the transmission device 2000, and further driving the winding shaft 210 to rotate to wind the consumable 300. It should be understood that the speed of the winding shaft 210 winding the consumable 300 should be controlled to be greater than the speed of the driving device 1000 driving the consumable 300 to return as much as possible when winding the consumable 300, so as to ensure that the returned consumable 300 can be wound on the winding shaft 210 in time. It should be further understood that in addition to being used in the field of 3D printing, the feeding and unwinding device 100 of the present application can also be used in the textile, additive manufacturing and other industries to realize the feeding and unwinding operations.

[0058] With continued reference to Figure 1 and Figure 2 , the driving device 1000 has a feeding state and an unwinding state, and the driving device 1000 is configured to drive the consumable 300 to move in the feeding direction to extrude the consumable 300 in the feeding state, and to drive the consumable 300 to move in the unwinding direction to retract the consumable 300 in the unwinding state. The feeding direction refers to the movement direction of the consumable 300 when it is separated from the raw material winding and unwinding device 200, and the unwinding direction refers to the movement direction of the consumable 300 when it is received into the raw material winding and unwinding device 200.

[0059] The transmission device 2000 is configured to be connected to the matching raw material winding and unwinding device 200, for example, the transmission device 2000 is configured to be in contact with the edge of the winding disc 220, and when the transmission device 2000 moves, it can drive the winding disc 220 and the winding shaft 210 to move through friction to wind the consumable 300. Specifically, the transmission device 2000 is configured to be in transmission cooperation with the raw material winding and unwinding device 200 in the unwinding state of the driving device 1000, and to be out of transmission cooperation with the raw material winding and unwinding device 200 in the feeding state of the driving device 1000.

[0060] The driving device 1000 is configured to drive the raw material winding and unwinding device 200 to synchronously receive the consumable 300 through the transmission device 2000 in the unwinding state of the driving device 1000. In one embodiment, the driving device 1000 comprises a motor 1600 and a worm 1700, and the output end of the motor 1600 is in transmission cooperation, for example, in meshing, with the transmission device 2000 through the worm 1700 to provide power to drive the transmission device 2000 to correspondingly act. For example, in one implementation, the motor 1600 controls the worm 1700 to rotate counterclockwise to control the feeding of the consumable 300, and the motor 1600 controls the worm 1700 to rotate clockwise to control the unwinding of the consumable 300.

[0061] According to the feeding and unwinding device 100 of the embodiment of the present application, in the unwinding process, the driving device 1000 is in the unwinding state, and the transmission device 2000 is in transmission cooperation with the raw material winding and unwinding device 200, at this time, the driving device 1000 provides power to drive the consumable 300 to move in the unwinding direction, and also provides power to drive the raw material winding and unwinding device 200 to move through the transmission device 2000 to synchronously receive the consumable 300. In the feeding process, the driving device 1000 is in the feeding state, and the transmission device 2000 is out of transmission cooperation with the raw material winding and unwinding device 200, at this time, the driving device 1000 only provides power to drive the consumable 300 to move in the feeding direction. Thus, the same power source, i.e., the driving device 1000, can be used to drive the consumable 300 to move and drive the raw material winding and unwinding device 200 to synchronously move with the consumable 300, the power loss is small, and the consistency of the movement of the raw material winding and unwinding device 200 and the consumable 300 can be ensured, the feeding and unwinding efficiency is high, and the feeding and unwinding device 100 is suitable for switching the feeding of different types of consumables 300. For example, the feeding and unwinding device 100 is suitable for use in multi-color 3D printing technology, and different types of consumables 300 can be efficiently switched in one printing process to print colorful objects using consumables 300 of different colors.

[0062] In one embodiment, the feeding and unwinding device 100 further comprises a mounting assembly 5000, and the mounting assembly 5000 comprises a base 5100, a raw material roller 5200, and a mounting shell 5300. The base 5100 is formed in an arc shape to facilitate cooperation with the circular winding disc 220 of the raw material winding and unwinding device 200. The raw material roller 5200 is connected to the base 5100 through a bearing to support the raw material winding and unwinding device 200, for example, to be tangent to the edge of the winding disc 220 to reduce resistance, so that the raw material winding and unwinding device 200 can freely rotate relative to the base 5100 in the feeding or unwinding process. The mounting shell 5300 is connected to the base 5100, and the mounting shell 5300 has a cavity inside to be used for integrated mounting of the driving device 1000, the transmission device 2000, and other components.

[0063] In one of the embodiments, the transmission device 2000 comprises a first transmission mechanism 2100 and a second transmission mechanism 2200; the first transmission mechanism 2100 is in transmission cooperation with the driving device 1000; the second transmission mechanism 2200 is configured to be out of transmission cooperation with the first transmission mechanism 2100 in the feeding state and in transmission cooperation with the first transmission mechanism 2100 in the discharging state to drive the raw material winding and unwinding device 200 to move. See Figures 2 to 5 As shown, the first transmission mechanism 2100 is always in transmission cooperation with the driving device 1000, and the second transmission mechanism 2200 is always in transmission cooperation with the raw material winding and unwinding device 200 and supports the raw material winding and unwinding device 200 together with the raw material roller 5200. Since the second transmission mechanism 2200 is in transmission cooperation with the first transmission mechanism 2100 in the discharging state, at this time, the driving device 1000 can drive the raw material winding and unwinding device 200 to move through the first transmission mechanism 2100 and the second transmission mechanism 2200 to synchronize the raw material winding and unwinding device 200 to receive the consumable 300, ensuring the consistency of movement. Since the second transmission mechanism 2200 is out of transmission cooperation with the first transmission mechanism 2100 in the feeding state, at this time, the driving device 1000 drives the consumable 300 to move in the feeding direction, so as to drive the raw material winding and unwinding device 200 to rotate freely relative to the second transmission mechanism 2200 and the raw material roller 5200, so as to efficiently release the consumable 300.

[0064] The transmission cooperation between the first transmission mechanism 2100 and the second transmission mechanism 2200 can be realized through the connection mode of ratchet, one-way bearing, etc., at this time, the connection and separation of the first transmission mechanism 2100 and the second transmission mechanism 2200 can be realized by driving the mutual rotation between the first transmission mechanism 2100 and the second transmission mechanism 2200.

[0065] See Figures 7 to 8As shown, the first transmission mechanism 2100 includes a transmission member 2110 having a second connecting portion 2111, the transmission member 2110 being connected with the driving device 1000 and configured to rotate in a forward direction in the feeding state and in a reverse direction in the feeding state; the second connecting portion 2111 is configured to be connected with the second transmission mechanism 2200 and configured to rotate freely relative to the second transmission mechanism 2200 when the transmission member 2110 rotates in the forward direction and to drive the second transmission mechanism 2200 to rotate synchronously when the transmission member 2110 rotates in the reverse direction. For example, in one embodiment, the surface of the transmission member 2110 is provided with a gear member 2120, which is engaged with the worm 1700 of the driving device 1000 to achieve transmission cooperation. One end of the transmission member 2110 is connected to the mounting shell 5300 through a bearing, so that the transmission member 2110 can rotate with the worm 1700. The other end of the transmission member 2110, i.e. the second connecting portion 2111, is configured in the form of a ratchet connection with the corresponding part of the second transmission mechanism 2200, so that when the transmission member 2110 rotates in the forward direction, the second transmission mechanism 2200 is in a non-power transmission state, i.e. the second transmission mechanism 2200 is not driven to move at this time, and when the transmission member 2110 rotates in the reverse direction, the second transmission mechanism 2200 can be driven to move, thereby achieving transmission cooperation with the second transmission mechanism 2200.

[0066] Referring to Figures 2 to 8 As shown, in one embodiment, the second transmission mechanism 2200 includes a first transmission assembly 2210 and a second transmission assembly 2220; the first transmission assembly 2210 is configured to rotate freely relative to the first transmission mechanism 2100 in the feeding state and to rotate synchronously with the first transmission mechanism 2100 in the feeding state; for example, the first transmission assembly 2210 can be configured to be connected with the first transmission mechanism 2100 through a ratchet connection. The second transmission assembly 2220 is connected with the first transmission assembly 2210, and the second transmission assembly 2220 is configured to rotate with the first transmission assembly 2210, thereby driving the raw material winding and unwinding device 200 to rotate and wind the consumable 300. In this way, the second transmission mechanism 2200 is divided into the first transmission assembly 2210 and the second transmission assembly 2220 connected with each other, which can achieve transmission cooperation of the first transmission assembly 2210 with the first transmission mechanism 2100 and transmission cooperation of the second transmission assembly 2220 with the raw material winding and unwinding device 200, so as to respectively design the structure of the first transmission assembly 2210 and the second transmission assembly 2220, improve the transmission stability, and make the second transmission mechanism 2200 assembled by the first transmission assembly 2210 and the second transmission assembly 2220 adaptable to a more complex installation scene.

[0067] For example, in one embodiment, the first transmission assembly 2210 includes a first transmission shaft 2211, a first transmission gear 2212, and an elastic member 2213. One end of the first transmission shaft 2211 is connected to one end of the elastic member 2213, and the other end of the first transmission shaft 2211 is provided with a first connecting portion 2211a. The first transmission gear 2212 is assembled on the first transmission shaft 2211 and engages with the second transmission assembly 2220. The elastic member 2213 is configured to elastically connect the first connecting portion 2211a and the first transmission mechanism 2100. Referring to Figures 7 to 8 As shown, the first connecting portion 2211a and the second connecting portion 2111 of the first transmission mechanism 2100 can be configured in a gear shape, so that the first connecting portion 2211a and the second connecting portion 2111 cooperate to form a ratchet structure. For example, in the feeding state, the second connecting portion 2111 rotates forward, at which time the second connecting portion 2111 can rotate freely relative to the first connecting portion 2211a to release the transmission; in the discharging state, the second connecting portion 2111 rotates reversely, at which time the second connecting portion 2111 can drive the first connecting portion 2211a to rotate synchronously to achieve transmission cooperation with the first transmission mechanism 2100. The first transmission gear 2212 surrounds the outer periphery of the first transmission shaft 2211 for engaging transmission with the second transmission assembly 2220. The two ends of the elastic member 2213 are connected to the first transmission shaft 2211 and the mounting shell 5300, respectively, and the elastic member 2213 can be selected as a spring in a compressed state. In the feeding state, since there is no power transmission between the second connecting portion 2111 and the first connecting portion 2211a, i.e., the second connecting portion 2111 and the first connecting portion 2211a are in a slipping state, i.e., no engagement state, at this time the distance between the second connecting portion 2111 and the first connecting portion 2211a can be buffered by the elastic member 2213 to reduce friction.

[0068] For example, in one embodiment, the first transmission assembly 2210 includes a first transmission shaft 2211, a first transmission gear 2212, an elastic member 2213, and a magnetic member 2214. One end of the first transmission shaft 2211 is connected to one end of the elastic member 2213, and the other end of the first transmission shaft 2211 has a first connecting portion 2211a, and the other end of the elastic member 2213 is connected to the magnetic member 2214. The first transmission gear 2212 is assembled on the first transmission shaft 2211 and engages with the second transmission assembly 2220. The magnetic member 2214 is configured to drive the first transmission shaft 2211 to move by magnetic attraction force to connect or separate the first connecting portion 2211a and the first transmission mechanism 2100. Referring to Figures 10 to 11As shown, the magnetic member 2214 is arranged on the mounting housing 5300 and located at the end of the first transmission shaft 2211 away from the first transmission mechanism 2100. The magnetic member 2214 can be an electromagnet, and at least part of the first transmission shaft 2211 is made of magnetic material. Thus, in the feeding state, the magnetic member 2214 is powered to generate a magnetic force to drive the first transmission shaft 2211 and the first transmission gear 2212 to move towards the magnetic member 2214. At this time, the elastic member 2213 is compressed, and then a distance between the first connecting portion 2211a and the second connecting portion 2111 is generated, i.e., the first connecting portion 2211a is separated from the second connecting portion 2111. In the discharging state, the magnetic force of the magnetic member 2214 disappears, and the elastic member 2213 rebounds by its own characteristics, so that the first connecting portion 2211a is connected with the second connecting portion 2111, thereby driving the first transmission shaft 2211 to move to connect or separate the first connecting portion 2211a from the first transmission mechanism 2100, so that the transmission control is more stable.

[0069] Referring to Figures 2 to 5 As shown, in one embodiment, the second transmission assembly 2220 includes a second transmission shaft 2221, a second transmission gear 2222, and a roller 2223. The second transmission gear 2222 is sleeved on the second transmission shaft 2221 and engaged with the first transmission assembly 2210. The roller 2223 is connected to the second transmission shaft 2221. The outer surface of the roller 2223 is in contact with the raw material collecting and releasing device 200. The two ends of the roller 2223 are connected to the base 5100 through bearings. The roller 2223 is configured to rotate with the second transmission shaft 2221 to drive the raw material collecting and releasing device 200 to rotate. Thus, in the discharging state, the driving device 1000 can drive the second transmission gear 2222 and the second transmission shaft 2221 to rotate through the first transmission mechanism 2100 and the first transmission assembly 2210, thereby driving the second transmission shaft 2221 to rotate. At this time, the raw material collecting and releasing device 200 can rotate with the second transmission shaft 2221 to synchronously wind the consumable 300.

[0070] In one embodiment, the driving device 1000 includes a driving shaft 1100, a first driving roller 1200 and a second driving roller 1300, a motor 1600, and a worm 1700. The output end of the motor 3100 is in transmission cooperation with the driving shaft 1100 through the worm 3200. The first driving roller 1200 is connected to the driving shaft 1100. The second driving roller 1300 is rotatably arranged. A conveying channel 1400 is formed between the first driving roller 1200 and the second driving roller 1300. The first driving roller 1200 is configured to rotate with the driving shaft 1100 to press the consumable 300 with the second driving roller 1300, so that the consumable 300 passes through the conveying channel 1400 in the feeding direction or the discharging direction, thereby driving the consumable 300 to be extruded or withdrawn.

[0071] For example, referring to Figures 7 to 9As shown, the outer ring of the drive shaft 1100 is provided with a drive gear 1500, which is engaged with the worm 1700, so that the motor 1600 can provide power to the drive gear 1500 and the drive shaft 1100 through the worm 1700, thereby driving the first drive roller 1200 to rotate to drive the consumable 300 to move. The second drive roller 1300 can be configured as a bearing structure to freely rotate for cooperating with the first drive roller 1200 to convey the consumable 300.

[0072] Further, the mounting assembly 5000 includes a material passing portion 5400, a rotating shaft 5500, a compression spring 5600 and a detection element 5700. The material passing portion 5400 is arranged in the mounting housing 5300 and is rotatably connected to the mounting housing 5300 through the rotating shaft 5500. The material passing portion 5400 is internally provided with a raw material hole 5410 for guiding the consumable 300 to pass through. The side wall of the material passing portion 5400 is configured in a structure form suitable for the first drive roller 1200 and the second drive roller 1300, so that the first drive roller 1200 and the second drive roller 1300 are oppositely arranged on both sides of the raw material hole 5410. The compression spring 5600 is connected between the material passing portion 5400 and the mounting housing 5300, for applying force to the material passing portion 5400 to make the consumable 300 in the raw material hole 5410 closely contact with the first drive roller 1200, so as to ensure that the first drive roller 1200 and the second drive roller 1300 can drive the consumable 300 to move when rotating. The detection element 5700 can be a micro switch, which is arranged on the side of the material passing portion 5400 away from the compression spring 5600, for detecting whether the consumable 300 exists in the material passing portion 5400, so as to judge the conveying state of the consumable 300.

[0073] Referring to Figures 10 to 11As shown, in one embodiment, the driving shaft 1100 comprises a first driving section 1110 and a second driving section 1120, the first driving section 1110 is provided with a driving gear 1500 outside the ring, the driving gear 1500 is engaged with the worm 1700, the first driving section 1110 has a first connecting end 1111, the second driving section 1120 is connected with the first driving roller 1200, the second driving section 1120 has a second connecting end 1121, the first connecting end 1111 and the second connecting end 1121 are configured to be connected to form a ratchet structure. Specifically, in the feeding state, power transmission is generated between the first connecting end 1111 and the second connecting end 1121, the first driving section 1110 and the second driving section 1120 are in driving cooperation, at the same time, the second connecting end 2111 is disconnected with the first connecting end 2211a, at this time, the driving device 1000 directly drives the consumable 300 to move in the feeding direction; in the feeding state, the power transmission between the first connecting end 1111 and the second connecting end 1121 is disconnected, the first driving section 1110 and the second driving section 1120 are disconnected, at the same time, the first connecting end 1111 and the second connecting end 1121 are in driving cooperation, at this time, the driving device 1000 drives the raw material winding and unwinding device 200 to move through the transmission device 2000, so as to realize the unwinding of the consumable 300 only by the rotation of the raw material winding and unwinding device 200.

[0074] In one embodiment, the feeding and withdrawing device 100 further comprises a monitoring assembly 4000 connected to the second driving roller 1300, the monitoring assembly 4000 is configured to monitor the rotation state information of the second driving roller 1300. For example, referring to Figure 8 As shown, the monitoring assembly 4000 can comprise a Hall sensor and a magnetic ring, which are used to be connected with the second driving roller 1300, the rotation of the magnetic ring is detected by the Hall sensor to obtain the rotation information of the second driving roller 1300, such as the rotation speed and the time, so as to calculate the conveying speed and the mileage of the consumable 300 moving with the second driving roller 1300, so as to facilitate the subsequent calculation of the conveying loss rate of the consumable 300, ensure the accuracy of the feeding amount, and also judge whether the consumable 300 is blocked.

[0075] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the present application.

[0076] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A push-pull device (100), characterized in that The feeding and withdrawing device (100) comprises: a driving device (1000) having a feeding state and a withdrawing state, the driving device (1000) being configured to extrude the consumable (300) in the feeding state and to withdraw the consumable (300) in the withdrawing state; a transmission device (2000) configured to connect a matched raw material receiving and releasing device (200), the transmission device (2000) being disengaged from the driving device (1000) in the feeding state, and the transmission device (2000) being in driving cooperation with the driving device (1000) in the withdrawing state to drive the raw material receiving and releasing device (200) to receive the consumable (300).

2. The in-out feed apparatus (100) according to claim 1, characterized in that The transmission device (2000) comprises a first transmission mechanism (2100) and a second transmission mechanism (2200); the first transmission mechanism (2100) is in driving cooperation with the driving device (1000); the second transmission mechanism (2200) is configured to be disengaged from the first transmission mechanism (2100) in the feeding state and to be in driving cooperation with the first transmission mechanism (2100) in the withdrawing state to drive the raw material receiving and releasing device (200) to move.

3. The advance and retreat material apparatus (100) according to claim 2, characterized in that, The second transmission mechanism (2200) comprises a first transmission assembly (2210) and a second transmission assembly (2220); the first transmission assembly (2210) is configured to be free to rotate relative to the first transmission mechanism (2100) in the feeding state and to rotate synchronously with the first transmission mechanism (2100) in the withdrawing state; the second transmission assembly (2220) is connected with the first transmission assembly (2210) and is configured to rotate with the first transmission assembly (2210) to drive the raw material receiving and releasing device (200) to rotate and wind the consumable (300).

4. The advance and retreat material apparatus (100) according to claim 3, characterized in that, The first transmission assembly (2210) comprises a first transmission shaft (2211), a first transmission gear (2212) and an elastic member (2213); one end of the first transmission shaft (2211) is connected with one end of the elastic member (2213), and the other end of the first transmission shaft (2211) is provided with a first connecting portion (2211a); the first transmission gear (2212) is assembled on the first transmission shaft (2211) and is engaged with the second transmission assembly (2220); the elastic member (2213) is configured to elastically connect the first connecting portion (2211a) with the first transmission mechanism (2100).

5. The advance and retreat material apparatus (100) according to claim 4, characterized in that, The first transmission assembly (2210) further comprises a magnetic member (2214); the other end of the elastic member (2213) is connected with the magnetic member (2214), the magnetic member (2214) is configured to drive the first transmission shaft (2211) to move by magnetic attraction force to connect or separate the first connecting portion (2211a) from the first transmission mechanism (2100).

6. The advance and retreat material apparatus (100) according to claim 4 or 5, characterized in that The first transmission mechanism (2100) comprises a transmission member (2110) having a second connecting part (2111), the transmission member (2110) is connected with the driving device (1000); The second connecting part (2111) is configured to be connected with the first connecting part (2211a), in the feeding state, the transmission member (2110) is free to rotate relative to the first connecting part (2211a), in the discharging state, the transmission member (2110) drives the first connecting part (2211a) to rotate synchronously.

7. The in-out feed apparatus (100) according to claim 1, characterized in that, The driving device (1000) comprises a driving shaft (1100), a first driving roller (1200) and a second driving roller (1300), the first driving roller (1200) is connected with the driving shaft (1100), the second driving roller (1300) is rotatably arranged, and a conveying channel (1400) is formed between the first driving roller (1200) and the second driving roller (1300). The first driving roller (1200) is configured to rotate with the driving shaft (1100) to cooperate with the second driving roller (1300) to drive the consumable (300) to be extruded or retracted.

8. The advance and retreat material apparatus (100) according to claim 7, characterized in that, The driving shaft (1100) comprises a first driving section (1110) and a second driving section (1120), the first driving section (1110) has a first connecting end (1111), the second driving section (1120) is connected with the first driving roller (1200), the second driving section (1120) has a second connecting end (1121), and the first connecting end (1111) and the second connecting end (1121) are configured to be connected to form a ratchet structure.

9. The advance and retreat material apparatus (100) according to claim 7, characterized in that, The feeding and discharging equipment (100) further comprises a monitoring assembly (4000) connected to the second driving roller (1300), and the monitoring assembly (4000) is configured to monitor the rotation state information of the second driving roller (1300).

10. A 3D printer characterized by, The 3D printer comprises: a printing body for printing a model; The feeding and discharging equipment (100) according to any one of claims 1-9 is configured to deliver or retract the consumable (300) to the printing body.

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