Buffer device, feeding device and 3D printer

Abstract

According to the buffering device and the feeding device, the length of a total consumable channel is changed mainly through relative movement of a first conveying part and a second conveying part so as to adapt to accumulation or stretching of consumables, and then buffering of the consumables is achieved. According to the technical scheme, the buffering device comprises a main body, and the main body comprises a first conveying part and a second conveying part; a total consumable channel is formed in the main body and is used for conveying consumables; at least one of the first conveying part and the second conveying part is used for moving under the action of the consumables so as to change the length of the total consumable channel. The consumable conveying device is mainly used for conveying consumables.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a buffer device, a feeding device and a 3D printer. Background Art

[0002] In a nozzle spraying 3D printer, the consumables are continuously transferred from the extruder to the print head, which heats the consumables into a molten state and then sprays them onto the printing platform. The power mechanism drives the print head and the printing platform to move relative to each other, coating the consumables, and then stacking them layer by layer to achieve three-dimensional molding.

[0003] In order to ensure the continuous supply of consumables, at least two extruders are usually set up to push consumables at the same time to increase the power of consumable transmission. However, due to mechanical errors and control errors, the speed of the extruders to transmit consumables cannot be guaranteed to be consistent, which may cause the consumables between adjacent extruders to accumulate, causing the consumables to become loose and tangled, or to be pulled and easily deformed, or to cause the consumables to slip between the extruders. Utility Model Content

[0004] In order to solve at least one of the above technical problems, the utility model provides a buffer device, a feeding device and a 3D printer.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] In one aspect, the utility model provides a buffer device, comprising:

[0007] A main body, the main body comprising a first conveying part and a second conveying part;

[0008] A total consumables channel is provided on the main body, and the total consumables channel is used to convey consumables, and the total consumables channel runs through the first conveying part and the second conveying part;

[0009] At least one of the first conveying part and the second conveying part is used to move under the action of the consumables to change the length of the total consumables channel.

[0010] On the other hand, the utility model also provides a feeding device, characterized in that it includes the aforementioned buffer device.

[0011] On the other hand, the utility model also provides a 3D printer, including the aforementioned feeding device and a printer body, the printer body including a rear end extruder, the feeding device including a front end extruder, and the buffer device being located between the rear end extruder and the front end extruder.

[0012] The utility model proposes a buffer device, a feeding device and a 3D printer, which mainly change the length of the total consumables channel to adapt to the accumulation or stretching of consumables through the relative movement of the first conveying part and the second conveying part, and then realize the buffering of consumables. In the prior art, at least two extruders are usually set to push consumables at the same time, and the speed of the extruders conveying consumables cannot be guaranteed to be consistent, resulting in the consumables between adjacent extruders may accumulate or be pulled, resulting in the consumables being loose and knotted, or easily being pulled, deformed and slipped. Compared with the prior art, in the present application document, the first conveying part and the second conveying part can move relative to each other, so that the total length of the total consumables channel on the main body changes. When consumables accumulate, the consumables will push the first conveying part and / or the second conveying part to move, thereby lengthening the total length of the total consumables channel, so that the consumables are released more in the total consumables channel, thereby avoiding the pressure of the accumulated consumables on the subsequent extruder; when the accumulated consumables are gradually consumed, the consumables accumulation situation improves, and the thrust of the consumables on the first conveying part and the second conveying part is weakened, and then the first conveying part and / or the second conveying part moves to shorten the total length of the total consumables channel, and reduce the extension of the consumables in the total consumables channel for feeding to the subsequent extruder, thereby avoiding pulling of the consumables, and achieving buffering of consumables accumulation and pulling when the feeding speeds of adjacent extruders are inconsistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a buffer device provided by an embodiment of the utility model at a first viewing angle;

[0014] Figure 2 A schematic structural diagram of a buffer device provided by an embodiment of the utility model at a second viewing angle;

[0015] Figure 3 A schematic structural diagram of a buffer device provided by an embodiment of the utility model at a third viewing angle;

[0016] Figure 4 A schematic structural diagram of a buffer device provided by an embodiment of the utility model at a fourth viewing angle;

[0017] Figure 5 A schematic diagram of the explosion structure of a buffer device provided in an embodiment of the utility model;

[0018] Figure 6 A schematic diagram of the structure of a buffer device provided by an embodiment of the utility model when the length of the total consumables channel is the second length;

[0019] Figure 7 A schematic structural diagram of a buffer device provided by an embodiment of the utility model when the length of the total consumables channel is a first length;

[0020] Figure 8A schematic diagram of the connection between a buffer device and a consumables box provided in an embodiment of the utility model;

[0021] Fig. 9 A schematic diagram of the structure of a feeding device provided by an embodiment of the utility model in a first state;

[0022] Fig.10 for Fig. 9 A partial enlarged view of the feeding device in area A shown in FIG.

[0023] Fig.11 A schematic diagram of the structure of a feeding device in a second state provided by an embodiment of the utility model;

[0024] Fig.12 for Fig.11 A partial enlarged view of the feeding device in area B shown in FIG.

[0025] Fig.13 A schematic structural diagram of a main board and a triggered member in a buffer device provided by an embodiment of the utility model at a first viewing angle;

[0026] Fig.14 A schematic structural diagram of a main board and a triggered member in a buffer device provided by an embodiment of the utility model at a second viewing angle;

[0027] Fig.15 A schematic diagram of the structure of a main board and a triggered member in a buffer device provided by an embodiment of the utility model from a third viewing angle;

[0028] Fig.16 A schematic diagram of the structure of a second conveying part in a buffer device provided in an embodiment of the utility model;

[0029] Fig.17 A schematic structural diagram of a first shell in a buffer device provided in an embodiment of the utility model;

[0030] Fig.18 A schematic structural diagram of a second shell in a buffer device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the following is a detailed description of the specific implementation method, structure, characteristics and effects of a buffer device and a feeding device proposed according to the present invention in combination with the accompanying drawings and preferred embodiments.

[0032] On the one hand, if Figure 1-Figure 7 As shown, the embodiment of the utility model provides a buffer device, comprising:

[0033] At least one main body 10, the main body 10 includes a first conveying part 100 and a second conveying part 200;

[0034] The main body 10 is provided with a total consumables channel, which is used to convey consumables, and the total consumables channel runs through the first conveying part 100 and the second conveying part 200;

[0035] At least one of the first conveying portion 100 and the second conveying portion 200 is used to move under the action of consumables to change the length of the total consumables channel.

[0036] The main body 10 is used to correspond to the consumables, and a single main body can be used for a consumable to pass through. The buffer device may include a single main body 10 for buffering a single consumable, or may include two or more main bodies 10 for transmitting and buffering multiple consumables. In the following embodiments of the present application, four main bodies 10 are used as an example for explanation. The main body 10 can be dispersed, such as being fixed separately, or it can be a partial structure connected to each other as a whole, and then the whole is fixed, which will be explained in conjunction with a more specific structure later. The main body 10 can be connected to an additional support structure to ensure that the position is stable and will not shake. Or, in one embodiment, Figure 8 As shown, the material tray 40 is placed in the consumable box 30 , and the main body 10 can be fixedly connected to the consumable box 30 .

[0037] The main body 10 can be arranged between any two adjacent extruders on the consumable transmission path. For the convenience of explanation, the end of the consumable transmission direction close to the material tray 40 is called the front end, and the end of the consumable transmission direction close to the print head is called the rear end. For example, a front end extruder 20 is arranged in the consumable box 30, and a rear end extruder is arranged near the print head or inside the print head, and the main body 10 is arranged between the front end extruder 20 and the rear end extruder. Alternatively, in some other embodiments, the main body 10 can also be arranged between the material tray 40 and the extruder, such as between the material tray 40 and the front end extruder 20. The material tray 40 can be connected to an active drive mechanism to rotate the material tray 40 to cooperate with the release or rewinding of the consumables, and the release or rewinding of the consumables may be inconsistent with the feeding or retracting speed of the front end extruder 20. The main body 10 can play a role in avoiding the accumulation or pulling of consumables between the material tray 40 and the front end extruder 20.

[0038] The total consumables channel refers to a channel that runs through the main body 10. If the main body 10 includes a first end and a second end, the total consumables channel runs through the first end and the second end of the main body. For example, the relative positions between the first conveying part 100 and the second conveying part 200 can be closely connected, such as being connected or plugged in with each other, that is, the total consumables channel is located inside the main body 10. Alternatively, the first conveying part 100 and the second conveying part 200 are independently and spaced apart from each other, and the total consumables channel is partially located inside the main body 10 and partially located between the first conveying part 100 and the second conveying part 200. In other words, the first conveying part 100 includes a first consumables input port and a first consumables output port, and the second conveying part 200 includes a second consumables input port and a second consumables output port, and the extension length from the first consumables input port to the second consumables output port on the consumables transmission path is the length of the total consumables channel. Alternatively, in some embodiments, the total consumables channel refers to the entire consumables extension path starting from the front extruder and extending to the rear extruder. It can also be the consumables extension path between the aforementioned material tray 40 and the front end extruder, or between the rear end extruder and the nozzle output end, or between the material tray 40 and the print head or nozzle output end.

[0039] More specifically, both the first conveying part 100 and the second conveying part 200 have partial areas of the total consumables channel, such as a first consumables channel 101 is provided on the first conveying part 100, and the first consumables channel 101 runs through both ends of the first conveying part 100 in the consumables conveying direction, thereby forming a first consumables input port and a first consumables output port. A second consumables channel 201 is provided on the second conveying part 200, and the second consumables channel 201 runs through both ends of the second conveying part 200 in the consumables conveying direction, thereby forming a second consumables input port and a second consumables output port. The first consumables channel 101 and the second consumables channel 201 may have an overlapping area in the consumables conveying direction, and the first consumables channel 101 and the second consumables channel 201 together constitute the total consumables channel, and the length of the total consumables channel can be adjusted by changing the length of the overlapping area. The first consumable channel 101 and the second consumable channel 201 can also be separated, that is, the first consumable channel 101 and the second consumable channel 201 constitute at least a partial area of ​​the total consumable channel, and the consumable conveying space between the first conveying part 100 and the second conveying part 200 is also a partial area of ​​the total consumable channel. The length of the total consumable channel can be adjusted by changing the distance between the first consumable channel 101 and the second consumable channel 201.

[0040] The total consumables channel can extend in a straight direction or in an arc shape, and can be set as needed. The relative position movement of the first conveying part 100 and the second conveying part 200 can be carried out in the consumables conveying direction, or in a direction different from the consumables conveying direction. However, it is necessary to ensure that the movement of the first conveying part 100 and / or the second conveying part 200 can change the length of the total consumables channel. To simplify the description, this application takes the example of at least one of the first conveying part 100 and the second conveying part 200 moving in a horizontal straight direction. When the consumables are conveyed normally, the positions of the first conveying part 100 and the second conveying part 200 are as follows: Figure 6 and Figure 1 , Figure 2 , Fig. 9 , Fig.11 When the feeding speed of the front extruder 20 is greater than the feeding speed of the rear extruder, the consumables will accumulate between the front extruder 20 and the rear extruder, and the accumulated consumables will squeeze the side walls of the first consumable channel 101 and the second consumable channel 201, exerting an external force on the first conveying part 100 and / or the second conveying part 200 to move away from each other, and then the first conveying part 100 and / or the second conveying part 200 move to the position as shown in FIG. Figure 7 and Figure 1 , Figure 2 , Fig. 9 , Fig.11 At the position shown by the middle body 10a, the total consumables channel is lengthened, the area between the total consumables channels is increased, the pressure of the accumulated consumables on the rear extruder is relieved, and the consumables are prevented from overlapping and clogging. When the feeding speed of the front extruder 20 is lower than the feeding speed of the rear extruder, the accumulated consumables will be gradually consumed, and the force of the consumables squeezing the side walls of the first consumables channel 101 and the second consumables channel 201 will be reduced. The first conveying part 100 and / or the second conveying part 200 move to shorten the total consumables channel, and the consumables move out of the total consumables channel and are conveyed by the rear extruder, thereby increasing the consumables that can be conveyed by the rear extruder, avoiding the pulling of the consumables between the front extruder 20 and the rear extruder, avoiding the deformation and breaking of the consumables, and avoiding slipping and losing steps.

[0041] The utility model proposes a buffer device, a feeding device and a 3D printer, which mainly change the length of the total consumables channel to adapt to the accumulation or stretching of consumables through the relative movement of the first conveying part and the second conveying part, and then realize the buffering of consumables. In the prior art, at least two extruders are usually set to push consumables at the same time, and the speed of the extruders conveying consumables cannot be guaranteed to be consistent, resulting in the consumables between adjacent extruders may accumulate or be pulled, resulting in the consumables being loose and knotted, or easily being pulled, deformed and slipped. Compared with the prior art, in the present application document, the first conveying part and the second conveying part can move relative to each other, so that the total length of the total consumables channel on the main body changes. When consumables accumulate, the consumables will push the first conveying part and / or the second conveying part to move, thereby lengthening the total length of the total consumables channel, so that the consumables are released more in the total consumables channel, thereby avoiding the pressure of the accumulated consumables on the subsequent extruder; when the accumulated consumables are gradually consumed, the consumables accumulation situation improves, and the thrust of the consumables on the first conveying part and the second conveying part is weakened, and then the first conveying part and / or the second conveying part moves to shorten the total length of the total consumables channel, and reduce the extension of the consumables in the total consumables channel for feeding to the subsequent extruder, thereby avoiding pulling of the consumables, and achieving buffering of consumables accumulation and pulling when the feeding speeds of adjacent extruders are inconsistent.

[0042] In one embodiment, the buffer device also includes: an elastic member 500, the elastic member 500 is connected to at least one of the first conveying part 100 and the second conveying part 200, and the elastic member 500 is used to apply an elastic force to the first conveying part 100 and / or the second conveying part 200 so as to move the first conveying part 100 and / or the second conveying part 200 and shorten the length of the total consumable channel.

[0043] The elastic member 500 allows the first conveyor 100 and / or the second conveyor 200 to move and shorten the length of the total consumables channel after the accumulated consumables are consumed, that is, when there is no consumable to push the first conveyor 100 and / or the second conveyor 200, and release the consumables in the total consumables channel, which plays a buffering role when the feeding speed of the front extruder 20 is lower than the feeding speed of the rear extruder. The elastic member 500 can be a component of various materials and structures, such as a spring, a tension spring or a compression spring, or foam, rubber, etc. One end of the elastic member 500 can be connected to a movable one of the first conveyor 100 and the second conveyor 200, and the other end of the elastic member 500 is positioned by an additional supporting structure, such as the consumable box 30; or, the two ends of the elastic member 500 are respectively connected to the first conveyor 100 and the second conveyor 200.

[0044] In the embodiment where the first conveying part 100 and the second conveying part 200 are arranged at intervals, the elastic member 500 may be located between the first conveying part 100 and the second conveying part 200. If the elastic member 500 is a tension spring, the degree of stretching of the elastic member 500 when the total consumables channel is extended is greater than the degree of stretching of the elastic member 500 when the total consumables channel is shortened. Alternatively, in some embodiments, at least a portion of the first conveying part 100 and the second conveying part 200 are arranged to overlap, and the elastic member 500 is located between the overlapping regions of the first conveying part 100 and the second conveying part 200. The overlap of the first conveying part 100 and the second conveying part 200 may be that the first conveying part 100 and the second conveying part 200 are plugged into each other, such as the first conveying part 100 is sleeved on the outside of a portion of the second conveying part 200, and the region where the first conveying part 100 and the second conveying part 200 are sleeved is called the overlapping region. The elastic member 500 is located between the overlapping regions of the first conveying part 100 and the second conveying part 200, which can reduce the space occupied by the elastic member 500 and make the overall structure of the buffer device more compact.

[0045] The relative movement of the first conveying part 100 and the second conveying part 200 may be either one of them or both of them. When the consumables are piled up, they may move toward the front extruder 20 or toward the rear extruder. Taking the buffer device fixed on the consumable box 30 as an example, several feasible implementation methods are described:

[0046] First, if Figure 9-12 As shown, the second conveying part 200 is closer to the front end of the consumables conveying direction than the first conveying part 100, that is, after the consumables are drawn out from the front extruder 20, they first enter the second consumables channel 201 of the second conveying part 200, and then enter the first consumables channel 101 of the first conveying part 100, and then are conveyed to the rear extruder. The position of the second conveying part 200 can be fixed, and the first conveying part 100 is used to move under the action of the consumables. The second conveying part 200 can be fixedly connected with the bottom surface of the consumable box 30 by bolts, and the second conveying part 200 can be slidably connected with the first conveying part 100, such as by sliding through or by the cooperation of the slide bar and the slide groove. The second conveying part 200 plays a guiding role in supporting and moving the first conveying part 100. Such a setting can achieve the adjustment of the length of the total consumables channel immediately when the consumables begin to accumulate between the front extruder 20 and the first conveying part 100, thereby preventing the accumulated consumables from affecting the rear extruder.

[0047] Secondly, the second conveying part 200 is closer to the front end of the consumables conveying direction than the first conveying part 100, that is, after the consumables are drawn out from the front extruder 20, they first enter the second consumables channel 201 of the second conveying part 200, and then enter the first consumables channel 101 of the first conveying part 100, and then convey to the rear extruder. The position of the first conveying part 100 can be fixed, and the second conveying part 200 is used to move under the action of the consumables. The first conveying part 100 can be fixedly connected with the bottom surface of the consumable box 30 by bolts, and the second conveying part 200 can be slidably connected with the first conveying part 100, such as sliding through or sliding connection through the cooperation of the slide bar and the slide groove, and the first conveying part 100 plays a guiding role in supporting and moving the second conveying part 200. Such a setting realizes the release of the accumulated consumables between the second conveying part 200 and the rear extruder, that is, when the consumables have been accumulated on one side of the rear extruder, the length of the total consumables channel is extended by the movement of the second conveying part 200, which can alleviate the accumulation of consumables in front of the rear extruder.

[0048] Thirdly, the first conveying part 100 and the second conveying part 200 are both used to move under the action of consumables. For example, the first conveying part 100 and the second conveying part 200 can be slidably connected to the bottom surface of the consumable box 30, and any one or both of the first conveying part 100 and the second conveying part 200 can be flexibly pushed to move according to the consumables stacking position, thereby alleviating the consumables stacking situation.

[0049] In one embodiment, the buffer device further includes: a triggering member 310 is disposed on the first conveying part 100 or the second conveying part 200, or a triggered member 320 is disposed on the first conveying part 100 or the second conveying part 200. The triggered member 320 is used to send a trigger signal when triggered by the triggering member 310.

[0050] The trigger member 310 may be used to move with the buffer device, while the trigger member 320 is fixed. For example, if the first conveying part 100 is used to move, and the second conveying part 200 is fixed, the trigger member 310 is arranged on the first conveying part 100. If the second conveying part 200 is used to move, and the first conveying part 100 is fixed, the trigger member 310 is arranged on the second conveying part 200. Alternatively, if both the first conveying part 100 and the second conveying part 200 are movable, the trigger member 310 may be arranged on the first conveying part 100 and the second conveying part 200. Alternatively, the triggered member 320 may be used to follow the movement of the buffer device, while the trigger member 310 is fixed. For example, if the first conveying part 100 is used to move, while the second conveying part 200 is fixed, the triggered member 320 is arranged on the first conveying part 100. If the second conveying part 200 is used to move, while the first conveying part 100 is fixed, the triggered member 320 is arranged on the second conveying part 200. Alternatively, if both the first conveying part 100 and the second conveying part 200 are movable, the triggered member 320 may be arranged on both the first conveying part 100 and the second conveying part 200. For convenience of explanation, in the following embodiments, the second conveying part 200 is fixed as an example. It can be understood that in the embodiments where the second conveying part 200 is movable or the first conveying part 100 and the second conveying part 200 are both movable, similar arrangement methods and effects are provided. The length of the total consumables channel includes a first length and a second length, and the first length is greater than the second length. The trigger member 310 and the triggered member 320 are mutually matching components that can be triggered within a preset distance or range to send a trigger signal. For example, the triggering member 310 is disposed on the first conveying part 100, and the position of the triggered member 320 is fixed. The triggered member 320 can be fixed to the bottom surface of the consumable box 30, or fixed to the second conveying part 200, or fixed by an additional supporting device. When no consumables act on the first conveying part 100, the first conveying part 100 moves to the second length of the total consumables channel under the action of the elastic member 500, such as Figure 9-10 As shown, at this time, the triggering member 310 triggers the corresponding triggered member 320, and it can be determined that the consumables are being transmitted normally, or that they are about to be pulled. Therefore, the front extruder 20 can be controlled to accelerate the feeding, and / or the rear extruder can be controlled to decelerate the feeding. After a period of time, the consumables will accumulate, and the first conveying part 100 will overcome the elastic force and move away from the second conveying part 200 under the action of the consumables. Figure 11-12 As shown, when the first conveying part 100 moves to the length of the total consumables channel being the first length, the triggering member 310 triggers the corresponding triggered member 320, and then it can be determined that the consumables are accumulated at this time, so the front extruder 20 can be controlled to slow down the feeding, and / or the rear extruder can be controlled to speed up the feeding. As in the above process, the feeding speeds of the front extruder 20 and the rear extruder are dynamically adjusted according to the signal of the triggering member 320, so as to avoid further accumulation or pulling of the consumables.

[0051] The number of the triggered member 320 may be only one, and only the pile-up or pull-up judgment may be performed. Alternatively, in one embodiment, the number of the triggered members 320 is two, and the two triggered members 320 are arranged at intervals in the consumables conveying direction. For example, the two triggered members 320 are the first triggered member 320a and the second triggered member 320b, respectively. The first triggered member 320a and the second triggered member 320b are arranged at intervals in the consumables conveying direction. Figure 9-10 As shown, the total length of the consumables channel is the second length, and the triggering member 310 triggers the first triggered member 320a to send a first trigger signal. Figure 11-12 As shown, the length of the total consumables channel is the first length, and the triggering member 310 triggers the second triggered member 320b to send a second trigger signal. If the first triggering signal is received, it means that the consumables are pulled, and then the front extruder 20 is controlled to accelerate the feeding, and / or the rear extruder is controlled to decelerate the feeding. If the second triggering signal is received, it means that the consumables are accumulated, and the front extruder 20 is controlled to decelerate the feeding, and / or the rear extruder is controlled to accelerate the feeding.

[0052] The triggering member 310 and the triggered member 320 may be in various forms, such as the triggered member 320 including a micro switch and the triggering member 310 including a touch head. When the first conveying unit 100 moves to the second length of the total consumables channel, the touch head will squeeze the micro switch and send out a first trigger signal. When the consumables begin to accumulate, the movement of the first conveying unit 100 will cause the touch head to move away from the micro switch, and then release the trigger, and the first trigger signal disappears. The second trigger signal will not be described in detail.

[0053] And / or, the triggered member 320 includes a photoelectric sensor, and the triggering member 310 includes a shielding member. When the first conveying part 100 moves to the length of the total consumables channel to the second length, the shielding member will enter the detection slot of the photoelectric sensor, blocking the light of the photoelectric sensor, and causing the photoelectric sensor to send a first trigger signal. When the consumables begin to accumulate, the movement of the first conveying part 100 will cause the shielding member to move away from the photoelectric sensor, and then the photoelectric sensor will receive the light signal again, and the first trigger signal will disappear. The situation of the second trigger signal will not be repeated.

[0054] And / or, the triggered member 320 includes a magnetic sensor, and the triggering member 310 includes a magnetic member. For example, the magnetic sensor may be a Hall sensor, and the magnetic member may be a magnetic sheet. When the first conveying unit 100 moves to a length of the total consumables channel that is a second length, the magnetic sheet will enter the detection range of the Hall sensor, and then trigger the Hall sensor to send a first trigger signal. When the consumables begin to accumulate, the movement of the first conveying unit 100 will cause the magnetic sheet to move away from the Hall sensor, and then the triggering effect of the Hall sensor disappears, and the first trigger signal disappears. The situation of the second trigger signal will not be repeated.

[0055] In the embodiment where there are multiple main bodies 10 and any one main body corresponds to two triggered members 320, the number of triggered members 320 is large. In order to facilitate the installation of the triggered members 320, in one embodiment, Figure 13-15 As shown, the buffer device further includes: a main board 400 , and the triggered component 320 is disposed on the main board 400 and electrically connected to the main board 400 .

[0056] When there are four main bodies 10, the number of the triggered components 320 is eight, and the main board 400 can be a PCB board, and the eight triggered components 320 can be mechanically and electrically connected to the PCB board. Figure 8 As shown, the mainboard 400 is fixed as a whole to the bottom surface of the consumable box 30 by bolts. To facilitate the installation of the triggered component 320, the fixed position can be adjusted once, so that the position accuracy of the triggered component 320 is better, and the electrical connection of each triggered component 320 is convenient. The mainboard 400 can be electrically connected to the main controller of the consumable box 30 or the main controller of the 3D printer. In some embodiments, some indicator lights can be synchronously set corresponding to the number of main bodies to indicate the status in different flashing frequencies or in a constant light or marquee manner. For example, when the length of a total consumable channel is the first length or the second length, the corresponding indicator light flashes differently to indicate the consumable accumulation situation of the current channel. The extrusion speed of the front-end extruder relative to the rear-end extruder can also be synchronously displayed.

[0057] In one embodiment, the first conveying part 100 and the second conveying part 200 are slidably plugged into each other, playing a guiding role of mutual support and movement, so that the buffer device is easier to fix and the overall structure is more compact. The plugging can be the first conveying part 100 inserted into the second conveying part 200, or the second conveying part 200 inserted into the first conveying part 100, which can be a whole insertion or a partial insertion. In the embodiment where the second conveying part 200 is fixed to the consumable box 30, the second conveying part 200 includes a fixed block 210 and a sliding column 220, and the sliding column 220 is connected to the fixed block 210. The consumable channel includes a first consumable channel 101 and a second consumable channel 201, the second consumable channel 201 passes through the fixed block 210 and the sliding column 220, and the first consumable channel 101 passes through the first conveying part 100. The first consumable channel 101 includes a plug-in area 1012, the sliding column 220 is slidably plugged into the plug-in area 1012, and the second consumable channel 201 is connected to the first consumable channel 101.

[0058] The sliding post 220 is inserted into the insertion area 1012 and slides against at least part of the inner wall of the insertion area 1012, thereby stabilizing the movement of the first conveying portion 100. More specifically, the sliding post 220, the insertion area 1012, the first consumable channel 101, and the second consumable channel 201 extend in the same direction and are coaxially arranged, thereby preventing the consumable from bending in the main body 10, thereby avoiding affecting the smooth transmission of the consumable.

[0059] In an embodiment where there are multiple bodies 10, such as four, the first conveying parts 100 of the multiple bodies 10 are connected or integrally formed, or the number of the bodies 10 is multiple, and the second conveying parts 200 of the multiple bodies 10 are connected or integrally formed. In other words, one of the first conveying parts 100 and the second conveying parts 200 that is fixed can be integrally formed, such as in an embodiment where the second conveying part 200 is fixed to the consumable box 30. Fig.16 As shown, the fixing blocks 210 of the plurality of second conveying parts 200 are integrally formed, and then the plurality of second conveying parts 200 of the integral type can be installed at one time, which is convenient to install and accurate in positioning.

[0060] In one embodiment, the consumable channel further includes a guide area 1011 , which is connected to the plug-in area 1012 , and a cross-sectional area of ​​the guide area 1011 decreases in a direction away from the plug-in area 1012 .

[0061] The guide area 1011 is an area farther away from the fixed block 210 than the plug-in area 1012, that is, the guide area 1011 is connected to the plug-in area 1012 from the end of the plug-in area 1012 in the consumable material transmission direction, and then plays a guiding role in the insertion of the consumable material. For example, the second conveying part 200 is inserted into the first conveying part 100, and the first conveying part 100 includes the plug-in area 1012. Figure 6-7 As shown, the cross-section of the guide area 1011 decreases in the direction away from the plug-in area 1012, or in the direction away from the front end extruder 20. The reduction can be a uniform reduction, so that the inner wall of the guide area 1011 forms an approximate conical surface, thereby guiding the consumable from the plug-in area 1012 into the first consumable channel 101 after the plug-in area 1012.

[0062] In one embodiment, the elastic member 500 of the buffer device may be located in the insertion area 1012, and the sliding column 220 is inserted into the insertion area 1012, thereby forming the overlapping area in the above embodiment. The elastic member 500 corresponds to the portion of the sliding column 220 inserted into the insertion area 1012. For example, the elastic member 500 may be a spring, and the spring is sleeved on the sliding column 220.

[0063] The second transmission part 200 further includes a first baffle 230 , which is connected to the sliding column 220 . A second baffle 110 is disposed on the inner wall of the insertion area 1012 , and the elastic member 500 is located between the first baffle 230 and the second baffle 110 .

[0064] The first baffle 230 and the second baffle 110 are used to limit the elastic member 500 within the plug-in area 1012, provide support for both ends of the elastic member 500, and seal the plug-in area 1012. The first baffle 230 and the sliding column 220 can be detachably connected, such as Fig.16 As shown, a clamping groove 221 may be provided on the sliding column 220 , and the first blocking piece 230 is clamped in the clamping groove 221 .

[0065] In one embodiment, if Figure 5 , Figure 17-18 As shown, the first conveying part 100 includes at least two shells, and the at least two shells are detachably connected to enclose a partial area of ​​the consumables channel.

[0066] At least two shells may include a first shell 121 and a second shell 122. The first consumable channel 101 is opened by the detachable connection between the first shell 121 and the second shell 122, and the first consumable channel 101 can be cleaned. At the same time, it is also convenient for the installation between the first conveying part 100 and the second conveying part 200, such as the installation of the elastic member 500. The connection method between the first shell 121 and the second shell 122 includes at least one of plug-in, sliding clamping, clamping, bonding, hanging and magnetic connection. For example, one of the elastic clamp 130 and the fixed clamp 140 is provided on the first shell 121, and the other of the elastic clamp 130 and the fixed clamp 140 is provided on the second shell 122. The first shell 121 and the second shell 122 are clamped by the elastic clamp 130 and the fixed clamp 140. In addition, in order to ensure that the connection between the first shell 121 and the second shell 122 is tight and stable, additional bolts can be used to connect the first shell 121 and the second shell 122.

[0067] In some embodiments, the second transmission unit 200 may be an integrated structure, or may include two or more shells, which is similar to the first transmission unit 100 and will not be described in detail herein.

[0068] In one embodiment, the buffer device further includes: at least one transmission tube 600, the transmission tube 600 is connected to the first transmission part 100 and / or the second transmission part 200, and the transmission tube 600 is communicated with the total consumables channel.

[0069] The transmission tube 600 is used to guide the consumables to prevent the consumables from bending at the edge of the main body 10, or at the openings at both ends of the total consumable channel, and can support the consumables to prevent the consumables from falling or shaking between the front extruder 20 and the main body 10, or between the rear extruder and the main body 10. When the consumables are piled up, the consumables will also interact with the inner wall of the transmission tube 600, and then the first transmission part 100 and / or the second transmission part 200 will be pushed by the transmission tube 600 to move, thereby increasing the consumable action area and the consumable action force. The transmission tube 600 can be made of a smooth material that is easy to transmit consumables, such as a Teflon tube.

[0070] The connection between the transmission tube 600 and the first transmission part 100 and / or the second transmission part 200 can be a variety of connection methods such as interference connection, clamping connection, screw connection, etc. In one embodiment, the buffer device further includes: a fastening joint 700, the transmission tube 600 is connected to the fastening joint 700, the fastening joint 700 is at least partially located in the main consumables channel, and interacts with the inner wall of the main consumables channel to fasten the transmission tube 600.

[0071] The fastening joint 700 may include a wedge-shaped area, which can then be stuck between the main consumables channel and the transmission tube 600. When the transmission tube 600 moves away from the first transmission part 100 and / or the second transmission part 200, the force between the wedge-shaped area and the inner wall of the main consumables channel will increase, thereby fastening the transmission tube 600. In one embodiment, the fastening joint 700 includes a fixing part 710 and at least one clamping jaw 720, the clamping jaw 720 is connected to the fixing part 710, the inner wall of the main consumables channel includes an action surface 102, the action surface 102 is inclined toward the transmission tube 600 in a direction close to the fixing part 710, the transmission tube 600 is connected to the fixing part 710, and the clamping jaw 720 acts on the action surface 102 to squeeze and fix the transmission tube 600.

[0072] Take the first transmission part 100 connected to the transmission pipe 600 as an example. Figure 6-7 As shown, the fixing portion 710 may be an annular structure, located outside the total consumables channel, and used for directly or indirectly abutting against the end face of the first conveying portion 100 for limiting position. The fixing portion 710 may be an annular structure, which is sleeved on the transmission tube 600, and the fixing portion 710 and the transmission tube 600 are fixed in position. In some embodiments, an auxiliary fixing member 800 may be provided, and the auxiliary fixing member 800 is connected to the fastening joint 700 or the fixing portion 710, and the auxiliary fixing member 800 squeezes the fastening joint 700 or the fixing portion 710 to fix the fastening joint 700 or the fixing portion 710 to the transmission tube 600. The auxiliary fixing member 800 may be a clip including a notch, which clamps the fastening joint 700 or the fixing portion 710 through the notch, and then fixes the position of the fastening joint 700 and the transmission tube 600. The clamping jaw 720 extends into the total consumables channel, as shown in FIG. Figure 17-18As shown, the action surface 102 tightens the total consumables channel in the direction close to the fixing portion 710 , and then squeezes the clamping jaws 720 toward the transfer tube 600 and the side away from the fixing portion 710 at the same time, thereby fixing the transfer tube 600 .

[0073] In one embodiment, if Figure 5-7 As shown, the buffer device further includes an auxiliary component 900 , the auxiliary component 900 includes an active surface 102 , and the auxiliary component 900 is sleeved on the consumables channel.

[0074] For example, in an embodiment in which the second conveying part 200 is integrally formed, in order to facilitate the installation of the clamp 720 and the like, and the processing of the active surface 102, an additional auxiliary part 900 may be provided, the active surface 102 may be processed on the auxiliary part 900, and the auxiliary part 900 may be installed in the second consumable channel 201 of the second conveying part 200. The auxiliary part 900 may be fixed by, for example, an interference fit or an additional top screw.

[0075] On the other hand, the utility model also provides a feeding device, comprising any of the aforementioned buffer devices. It also comprises a consumable box 30, to which a front end extruder 20 is connected, and the consumable box 30 can be used to place a plurality of trays 40, and the front end extruder 20 comprises a plurality of extrusion units, and the extrusion units correspond to the trays 40 to transfer the consumables on the corresponding trays 40. The main body 10 of the buffer device can be fixed to the consumable box 30, such as fixed to the bottom plate of the consumable box 30.

[0076] The feeding device includes any of the aforementioned buffer devices, including the advantages of any of the aforementioned buffer devices, which will not be repeated here.

[0077] On the other hand, the utility model also provides a 3D printer, including the aforementioned feeding device and a printer body, the printer body including a rear end extruder, the feeding device including a front end extruder 20, and the buffer device being located between the rear end extruder and the front end extruder 20.

[0078] The rear end extruder may be an extruder on the print head, or an extruder disposed adjacent to the print head. The buffer device is located between the rear end extruder and the front end extruder 20 , thereby achieving buffering of consumable accumulation and pulling between the rear end extruder and the front end extruder 20 .

[0079] The 3D printer includes a feeding device, including the advantages of any of the aforementioned buffer devices, which will not be repeated here.

[0080] The utility model also provides the following implementation modes:

[0081] Reference numeral 1. A buffer device, comprising:

[0082] At least one main body 10, the main body 10 includes a first conveying part 100 and a second conveying part 200;

[0083] The main body 10 is provided with a total consumables channel, which is used to convey consumables, and the total consumables channel runs through the first conveying part 100 and the second conveying part 200;

[0084] At least one of the first conveying portion 100 and the second conveying portion 200 is used to move under the action of consumables to change the length of the total consumables channel.

[0085] Reference numeral 2. A buffer device according to reference numeral 1, wherein the buffer device further comprises:

[0086] The elastic member 500 is connected to at least one of the first conveying part 100 and the second conveying part 200 . The elastic member 500 is used to apply elastic force to the first conveying part 100 and / or the second conveying part 200 to change the length of the total consumables channel.

[0087] Reference numeral 3. A buffer device according to reference numeral 2, wherein:

[0088] The elastic member 500 is located between the first conveying portion 100 and the second conveying portion 200;

[0089] Alternatively, at least a portion of the first conveying portion 100 and the second conveying portion 200 are overlapped, and the elastic member 500 is located in the overlapping region of the first conveying portion 100 and the second conveying portion 200 .

[0090] Reference numeral 4. A buffer device according to reference numeral 1, wherein:

[0091] The second conveying part 200 is closer to the front end of the consumables conveying direction than the first conveying part 100 . The position of the second conveying part 200 is fixed, and the first conveying part 100 is used to move under the action of the consumables.

[0092] Alternatively, the second conveying part 200 is closer to the front end of the consumables conveying direction than the first conveying part 100, the position of the first conveying part 100 is fixed, and the second conveying part 200 is used to move under the action of the consumables;

[0093] Alternatively, the first conveying part 100 and the second conveying part 200 are both used to move under the action of consumables.

[0094] Reference numeral 5. The buffer device according to reference numeral 1, wherein the buffer device further comprises:

[0095] A triggering member 310 and a triggered member 320;

[0096] The triggering member 310 is disposed on the first conveying part 100 or the second conveying part 200 , or the triggered member 320 is disposed on the first conveying part 100 or the second conveying part 200 , and the triggered member 320 is used to send a trigger signal under the triggering of the triggering member 310 .

[0097] Reference numeral 6. The buffer device according to reference numeral 5, wherein the buffer device further comprises:

[0098] The main board 400 , and the triggered component 320 are disposed on the main board 400 and are electrically connected to the main board 400 .

[0099] Reference numeral 7. A buffer device according to reference numeral 5, wherein:

[0100] The number of triggered components 320 is at least two, and at least two triggered components 320 are arranged at intervals in the consumable material conveying direction. When the total consumable material channel is at a first length, the trigger component 310 triggers one of the triggered components 320 and sends a first trigger signal. When the total consumable material channel is at a second length, the trigger component 310 triggers another triggered component 320 and sends a second trigger signal.

[0101] Reference numeral 8. A buffer device according to reference numeral 5, wherein:

[0102] The triggered member 320 includes a micro switch, and the trigger member 310 includes a touch head;

[0103] And / or, the triggered component 320 includes a photoelectric sensor, and the trigger component 310 includes a shielding component;

[0104] And / or, the triggered member 320 includes a magnetic sensor, and the triggering member 310 includes a magnetic member.

[0105] Reference numeral 9. A buffer device according to reference numeral 1, wherein:

[0106] The first conveying portion 100 and the second conveying portion 200 are slidably plugged into each other.

[0107] Reference numeral 10. A buffer device according to reference numeral 9, wherein:

[0108] The second conveying part 200 includes a fixed block 210 and a sliding column 220, and the sliding column 220 is connected to the fixed block 210;

[0109] The main consumables channel includes a first consumables channel 101 and a second consumables channel 201 , the second consumables channel 201 passes through the fixed block 210 and the sliding column 220 , and the first consumables channel 101 passes through the first conveying part 100 ;

[0110] The first consumable material channel 101 includes an inserting area 1012 , the sliding column 220 is slidably inserted in the inserting area 1012 , and the second consumable material channel 201 is connected to the first consumable material channel 101 .

[0111] Reference numeral 11. A buffer device according to reference numeral 10, wherein:

[0112] The elastic member 500 of the buffer device is located in the insertion area 1012 .

[0113] Reference numeral 12. A buffer device according to reference numeral 10, wherein:

[0114] The second transmission part 200 further includes a first baffle 230 , which is connected to the sliding column 220 . A second baffle 110 is disposed on the inner wall of the insertion area 1012 , and the elastic member 500 is located between the first baffle 230 and the second baffle 110 .

[0115] Reference numeral 13. A buffer device according to reference numeral 12, wherein:

[0116] The second blocking piece 110 is slidably connected to the sliding column 220 , and the first blocking piece 230 is slidably connected to the insertion area 1012 .

[0117] Reference numeral 14. A buffer device according to reference numeral 10, wherein:

[0118] The total consumables channel also includes a guide area 1011 , which is connected to the plug-in area 1012 , and a cross-sectional area of ​​the guide area 1011 decreases in a direction away from the plug-in area 1012 .

[0119] Reference number 15. A buffer device according to reference number 1, wherein:

[0120] The first conveying part 100 includes at least two shells, and the at least two shells are detachably connected to enclose a partial area of ​​the total consumables channel. The connection method of the at least two shells includes at least one of plug-in, sliding card connection, clamping, bonding, hanging and magnetic attraction connection.

[0121] 16. The buffer device according to number 1, wherein the buffer device further comprises:

[0122] At least one transmission tube 600 is connected to the first transmission part 100 and / or the second transmission part 200 , and the transmission tube 600 is communicated with the main consumables channel.

[0123] 17. The buffer device according to number 16, wherein the buffer device further comprises:

[0124] The fastening joint 700 is connected to the transmission tube 600 . The fastening joint 700 is at least partially located in the main consumables channel and interacts with the inner wall of the main consumables channel to fasten the transmission tube 600 .

[0125] 18. The buffer device according to item 17, wherein:

[0126] The fastening joint 700 includes a fixing portion 710 and at least one clamping jaw 720, the clamping jaw 720 is connected to the fixing portion 710, the inner wall of the main consumables channel includes an action surface 102, the action surface 102 is inclined toward the transmission tube 600 in a direction close to the fixing portion 710, the transmission tube 600 is connected to the fixing portion 710, and the clamping jaw 720 acts on the action surface 102 to squeeze and fix the transmission tube 600;

[0127] And / or, the buffer device further includes: an auxiliary fixing member 800 , the auxiliary fixing member 800 is connected to the fastening joint 700 , and the auxiliary fixing member 800 squeezes the fastening joint 700 to fix the fastening joint 700 to the transmission pipe 600 .

[0128] 19. The buffer device according to number 18, wherein the buffer device further comprises:

[0129] The auxiliary component 900 includes an active surface 102 , and the auxiliary component 900 is plugged into the main consumables channel.

[0130] 20. The buffer device according to number 18, wherein:

[0131] There are multiple bodies 10, and the first transmission parts 100 of the multiple bodies 10 are connected or integrally formed;

[0132] Alternatively, there are multiple main bodies 10 , and the second transmission parts 200 of the multiple main bodies 10 are connected or integrally formed.

[0133] 21. A feeding device, comprising the buffer device of any one of the above-mentioned numbers 1-20.

[0134] 22. A 3D printer, comprising the feeding device of the above-mentioned label 21 and a printer body, wherein the printer body includes a rear end extruder, the feeding device includes a front end extruder 20, and the buffer device is located between the rear end extruder and the front end extruder 20.

[0135] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A buffer device, characterized in that: include: at least one body, the body comprising a first conveying portion and a second conveying portion; A total consumables channel is provided on the main body, and the total consumables channel is used to convey consumables, and the total consumables channel passes through the first conveying part and the second conveying part; At least one of the first conveying portion and the second conveying portion is used to move under the action of the consumables to change the length of the total consumables channel.

2. The buffer device according to claim 1, characterized in that: The buffer device also includes: An elastic member, wherein the elastic member is connected to at least one of the first conveying part and the second conveying part, and the elastic member is used to apply elastic force to the first conveying part and / or the second conveying part to change the length of the total consumables channel.

3. The buffer device according to claim 2, characterized in that: The elastic member is located between the first conveying portion and the second conveying portion; Alternatively, at least a portion of the first conveying portion and the second conveying portion are overlapped, and the elastic member is located in the overlapping region of the first conveying portion and the second conveying portion.

4. The buffer device according to claim 1, characterized in that: The second conveying part includes a fixed block and a sliding column, and the sliding column is connected to the fixed block; The total consumables channel includes a first consumables channel and a second consumables channel, the second consumables channel passes through the fixed block and the sliding column, and the first consumables channel passes through the first conveying part; The first consumable material channel includes an insertion area, the sliding column is slidably inserted in the insertion area, and the second consumable material channel is connected to the first consumable material channel; The elastic member of the buffer device is located in the plug-in area.

5. The buffer device according to claim 4, characterized in that: The second transmission part further includes a first baffle, the first baffle is connected to the sliding column, a second baffle is arranged on the inner wall of the plug-in area, and the elastic member is located between the first baffle and the second baffle.

6. The buffer device according to claim 5, characterized in that: The second blocking piece is slidably connected to the sliding column, and the first blocking piece is slidably connected to the plug-in area.

7. The buffer device according to claim 4, characterized in that: The total consumables channel also includes a guide area, which is connected to the plug-in area, and the cross-sectional area of ​​the guide area decreases in a direction away from the plug-in area.

8. The buffer device according to claim 1, characterized in that: The buffer device also includes: At least one transmission tube, the first transmission part and / or the second transmission part is connected with the transmission tube, and the transmission tube is communicated with the total consumables channel; The buffer device also includes: A fastening joint, the transmission tube is connected to the fastening joint, the fastening joint is at least partially located in the total consumables channel, and interacts with the inner wall of the total consumables channel to fasten the transmission tube.

9. A feeding device, characterized in that: The buffer device comprises the buffer device described in any one of claims 1 to 8.

10. A 3D printer, characterized in that: It comprises the feeding device as described in claim 9 above, and a printer body, wherein the printer body comprises a rear-end extruder, the feeding device comprises a front-end extruder, and the buffer device is located between the rear-end extruder and the front-end extruder.

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