Spool holder for 3D printer, 3D printer, and 3D printing system

Abstract

The present application provides a spool holder for a 3D printer, a 3D printer, and a 3D printing system. The spool holder comprises: a spool holder body; at least two barrel rotating shafts connected to the spool holder body, one barrel rotating shaft being used for placing one 3D printing spool; and a support leg fixedly connected to a bottom portion of the spool holder body, the support leg being used to support the spool holder body. One end of the support leg is fixedly connected to the bottom portion of the spool holder body, and the other end of the support leg is fixed to the 3D printer.

Description

Tray rack for 3D printer, 3D printer and 3D printing system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 25, 2023, with application number 202322307959.7 and application name “Panel rack for 3D printer, 3D printer and 3D printing system”, and claims priority to the international application filed with the China Patent Office on December 7, 2023, with application number PCT / CN2023 / 137255 and application name “Panel rack for 3D printer, 3D printer and 3D printing system”. All of the above contents are incorporated into this application by reference. Technical Field

[0002] The present application relates to the technical field of 3D printing, and in particular to a material tray rack for a 3D printer, a 3D printer, and a 3D printing system. Background Art

[0003] A 3D printer, also known as a three-dimensional printer or stereo printer, is a rapid prototyping device typically employing digital printing technology. 3D printers use materials such as PLA (polylactic acid) and ABS (acrylonitrile butadiene styrene plastic) as printing materials. These materials are typically wound onto reels for easy access.

[0004] To facilitate user operation, 3D printers are generally equipped with a material tray rack, which can be used to support and place the material tray. The material line in the material tray can be inserted into the extrusion mechanism of the print head. When the 3D printer is running, the extrusion mechanism can squeeze the material line to the nozzle in the print head for use. Under the action of the extrusion mechanism, the material line at the print head will pull the material line in the material tray to continuously move toward the nozzle.

[0005] Summary of the Invention

[0006] The present application provides a material tray rack for a 3D printer, a 3D printer, and a 3D printing system.

[0007] In a first aspect, an embodiment of the present application provides a material tray rack for a 3D printer, the material tray rack comprising:

[0008] Tray rack body;

[0009] At least two barrel rotating shafts are connected to the tray frame, wherein one barrel rotating shaft is used to place a 3D printing tray;

[0010] A supporting tripod is fixedly connected to the bottom of the tray rack body, and the supporting tripod is used to support the tray rack body; wherein, one end of the supporting tripod is fixedly connected to the bottom of the tray rack body, and the other end of the supporting tripod is fixed to the 3D printer.

[0011] In the present application, the material tray rack can be fixed on the 3D printer, thereby saving the use space of the 3D printer.

[0012] In combination with the first aspect, in a first possible implementation method, the material tray rack also includes at least two feeding and withdrawing devices, which are fixed on the material tray rack body; wherein each feeding and withdrawing device includes an extrusion mechanism, and is used to transport the material line in the 3D printing material tray on the corresponding barrel rotating shaft to the 3D printer, or to withdraw the material line into the 3D printing material tray on the corresponding barrel rotating shaft.

[0013] In the embodiments of the present application, multiple 3D printing material trays can be placed simultaneously on the tray rack; and the feed and return device is provided to provide force to the material line. Even if the tray rack is placed far away from the 3D printer, there will be no lack of extrusion force for feeding or returning the material. Even if the distance between the material line in the 3D printing material tray and the 3D printer is long, the feed and return device on the tray rack can still transport the material line to the 3D printer or return the material line to the 3D printer tray.

[0014] In combination with the first aspect or any of the above possible implementations, in a second possible implementation, each of the feed and withdraw devices includes a feed and withdraw port, and the feed and withdraw port is used to connect to a material pipe that transmits the material line;

[0015] The material tray rack further includes a material line guide frame, the material line guide frame is arranged at at least one material feeding and withdrawing device, and the material line guide frame includes an opening for allowing the material pipe to pass through;

[0016] The line connecting the opening of the material line guide frame and the feed and withdraw opening is perpendicular to the plane where the feed and withdraw opening is located. Implementation of the present application allows the material line to be transported perpendicular to the feed and withdraw opening, reducing the feed and withdraw resistance of the material line in the material pipe.

[0017] In combination with the first aspect or any one of the above possible implementations, in a third possible implementation, the at least two barrel rotating shafts include barrel rotating shafts distributed on both sides of the tray rack body, and the at least two feeding and withdrawing devices include feeding and withdrawing devices distributed on both sides of the tray rack body, wherein each feeding and withdrawing device corresponds to the barrel rotating shaft located on the same side.

[0018] In the embodiment of the present application, the barrel shafts are arranged on both sides of the tray rack body, which can improve the space utilization of the tray rack. In addition, the barrel shafts are arranged on both sides of the tray rack body to avoid the risk of the tray rack becoming unbalanced and tipping over due to the 3D printer tray hanging on one side of the tray rack body.

[0019] In combination with the first aspect or any of the above possible implementations, in a fourth possible implementation, at least two barrel rotating shafts include two barrel rotating shafts located on one side of the tray rack body, and the at least two feed and withdraw devices include two feed and withdraw devices located on the same side as the two barrel rotating shafts, and the two feed and withdraw devices are located between the two barrel rotating shafts.

[0020] In the embodiment of the present application, the distance between the 3D printing material tray and the material feeding and withdrawing device is reduced, and the entire material tray rack can be made simpler.

[0021] In combination with the first aspect or any of the above possible implementations, in a fifth possible implementation, among the two barrel rotating shafts on one side of the tray rack body, the axis of one barrel rotating shaft is higher than the axis of the other barrel rotating shaft.

[0022] In the embodiment of the present application, by arranging the two barrel shafts on one side one high and one low, the space occupied by the 3D printing material tray placed on the two barrel shafts on the horizontal plane can be reduced.

[0023] In combination with the first aspect or any one of the above possible implementations, in a sixth possible implementation, the at least two barrel rotating shafts correspond one-to-one to the at least two feeding and withdrawing devices.

[0024] In combination with the first aspect or any one of the above possible implementations, in a seventh possible implementation, for any one of the at least two feeding and withdrawing devices, the feeding port of any one of the feeding and withdrawing devices is downward, and the discharging port of any one of the feeding and withdrawing devices is upward; or, the feeding port of any one of the feeding and withdrawing devices is upward, and the discharging port of any one of the feeding and withdrawing devices is downward.

[0025] In combination with the first aspect or any of the above possible implementations, an eighth possible implementation further includes:

[0026] The control component is used to control the feeding and withdrawing device to provide the material line in the 3D printing material tray on the corresponding barrel shaft to the 3D printer, or to control the feeding and withdrawing device to withdraw the material line to the 3D printing material tray on the corresponding barrel shaft.

[0027] In the embodiment of the present application, the feeding device can be controlled by a control component to assist the material line in feeding and withdrawing materials.

[0028] In combination with the first aspect or any of the above possible implementations, in a ninth possible implementation, the feeding and withdrawing device includes:

[0029] Motor;

[0030] A driving gear connected to the motor, wherein the motor is used to drive the driving gear to rotate;

[0031] A driven gear is spaced apart from the driving gear, and the driving gear and the driven gear are used to cooperate to clamp the material line output by the 3D printing material tray;

[0032] In combination with the first aspect or any of the above possible implementations, in a tenth possible implementation, the feeding and withdrawing device further includes:

[0033] A reduction transmission system is connected to the motor shaft of the motor; the output gear of the reduction transmission system is meshed with the driving gear.

[0034] In the embodiment of the present application, the reduction transmission system can avoid the problem of excessive torque being output to the driving gear, which would lead to uncontrollable feeding speed of the material line.

[0035] In combination with the first aspect or any of the above possible implementations, in an eleventh possible implementation, the feeding and withdrawing device further includes:

[0036] The motor-side Hall sensor is used to measure the speed of the motor.

[0037] The Hall speed sensor at the feed line end is used to measure the rotational speed information of the driven gear.

[0038] In an embodiment of the present application, the rotational speed information of the driven gear can be measured based on the Hall speed sensor at the end of the material line, and the movement information of the material line can be determined based on the rotational speed information of the driven gear; then, based on the movement information of the material line and the rotational speed information of the motor, it is automatically detected whether the material line has a slipping problem.

[0039] In combination with the first aspect or any of the above possible implementations, in a twelfth possible implementation, the at least two barrel rotating shafts are connected to the tray rack body, including: the at least two barrel rotating shafts are connected to the tray rack body through a fixed tube, the at least two barrel rotating shafts are rotatably connected to the fixed tube, and the fixed tube is fixedly connected to the tray rack body.

[0040] In combination with the first aspect or any one of the above possible implementations, in a thirteenth possible implementation, the support leg includes a rotating component and a fixed component; wherein,

[0041] One end of the rotating component is fixedly connected to the bottom of the tray rack body, and the other end of the rotating component is rotatably connected to one end of the fixed component;

[0042] The other end of the fixing component is fixed on the 3D printer.

[0043] In this application, the tray rack can be rotated relative to the 3D printer, and a 3D printing tray is placed on the tray rack. After the printing material on the 3D printing tray is used up, the user can rotate the tray rack to a comfortable position to change the material. This not only saves space in the 3D printer, but also facilitates the user's material changing operation.

[0044] In combination with the first aspect or any one of the above possible implementations, in a fourteenth possible implementation, the support leg further includes a locking member, wherein the locking member is provided at a rotational connection between the rotating member and the fixed member;

[0045] The locking member is used to prevent the rotating component from rotating relative to the fixed component in a locked state, or to allow the rotating component to rotate relative to the fixed component in a released state.

[0046] In the present application, the rotation enable between the rotating component and the fixed component is switched by a locking member, so that the material tray rack body can be rotated relative to the 3D printer, and the material tray rack body can be fixed when the material tray rack body needs to be fixed relative to the 3D printer.

[0047] In combination with the first aspect or any one of the above possible implementations, in a fifteenth possible implementation, the support bracket further includes a rotation angle limiter, which is disposed between the rotating component and the fixed component.

[0048] In an embodiment of the present application, a rotation angle limiter is provided to limit the rotation angle of the tray rack relative to the 3D printer, thereby preventing the tray rack from rotating too much relative to the 3D printer and pulling the printing material transported to the 3D printer by the 3D printing tray.

[0049] In combination with the first aspect or any of the above possible implementations, in a sixteenth possible implementation, at least one of the rotating component and the fixed component is provided with a rotation angle limiter. In this embodiment of the present application, by providing the rotation angle limiter on the rotating component and / or the fixed component, the rotation angle of the material tray holder relative to the 3D printer is limited, thereby preventing the material tray holder from rotating too far relative to the 3D printer and pulling the printing material being conveyed to the 3D printer by the 3D printing material tray.

[0050] In combination with the first aspect or any one of the above possible implementations, in a seventeenth possible implementation, the other end of the supporting leg is detachably fixed to a frame of the 3D printer.

[0051] In this application, the material tray rack can be fixed to the 3D printer by means of a snap-on method, without adding any extra parts. This is simple and convenient, and can save the use space of the 3D printer.

[0052] In combination with the first aspect or any of the above possible implementations, in an eighteenth possible implementation, the structure of the 3D printer is a gantry structure; the material tray rack body is plate-shaped;

[0053] The other end of the supporting leg is fixed to the crossbeam of the 3D printer, and the plane where the material tray rack body is located is inclined to the plane formed by the column of the 3D printer and the crossbeam.

[0054] In this application, the printing material in the 3D printing tray is transferred to the 3D printer via a material tube, that is, the material tube connects the tray rack and the 3D printer. When the tray rack's support legs are fixed to the 3D printer's crossbeam, the material tube will bend. Implementing this application can increase the bending radius of the material tube, thereby reducing the resistance of the material line in the material tube.

[0055] In a second aspect, an embodiment of the present application further provides a 3D printer, comprising: a tray rack according to the first aspect or any one of the above-mentioned possible implementation methods of the first aspect, wherein the tray rack body of the tray rack is fixedly connected to the frame of the 3D printer.

[0056] In a third aspect, an embodiment of the present application further provides a 3D printer system, comprising a 3D printer and a material tray rack described in combination with the first aspect or in combination with any one of the above possible implementations of the first aspect.

[0057] It should be understood that the implementation and beneficial effects of the above-mentioned aspects of the present application can be referenced to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] FIG1 is a schematic diagram of a scenario of a 3D printing system provided in an embodiment of the present application;

[0059] FIG2 is a schematic diagram of the planar structure of the tray rack provided in an embodiment of the present application;

[0060] FIG3 is a schematic diagram of the planar structure of the tray rack provided in an embodiment of the present application;

[0061] FIG4 is a schematic diagram of the planar structure of the tray rack provided in an embodiment of the present application;

[0062] FIG5 is a schematic diagram of the planar structure of the tray rack provided in an embodiment of the present application;

[0063] FIG6 is a schematic diagram of the three-dimensional structure of the material tray rack provided in an embodiment of the present application;

[0064] FIG7a is a schematic plan view of the structure of a material feeding and withdrawing device provided in an embodiment of the present application;

[0065] FIG7 b is a schematic plan view of the structure of the feeding and withdrawing device provided in an embodiment of the present application;

[0066] FIG8 is a schematic diagram of the planar structure of the material feeding and withdrawing device provided in an embodiment of the present application;

[0067] FIG9 is a schematic diagram of the planar structure of the material feeding and withdrawing device provided in an embodiment of the present application;

[0068] FIG10 is a schematic diagram of the planar structure of the material feeding and withdrawing device provided in an embodiment of the present application;

[0069] FIG11 is another schematic diagram of the three-dimensional structure of the tray rack provided in an embodiment of the present application;

[0070] FIG12 is another schematic diagram of a 3D printing system according to an embodiment of the present application;

[0071] FIG13a is a schematic structural diagram of a support stand provided in an embodiment of the present application;

[0072] FIG13 b is an exploded view of a support stand provided in an embodiment of the present application;

[0073] FIG13c is a diagram of a rotation state of the support leg provided by an embodiment of the present application;

[0074] FIG14 is a rotation state diagram of the tray rack shown in FIG11;

[0075] FIG15 is another schematic diagram of the three-dimensional structure of the tray rack provided in an embodiment of the present application;

[0076] FIG16 is a diagram showing a rotation state of the tray rack shown in FIG15. DETAILED DESCRIPTION

[0077] The implementation of the technical solution of the present application is further described in detail below with reference to the accompanying drawings.

[0078] 1 , which is a schematic diagram of a 3D printing system according to an embodiment of the present invention. As shown in FIG1 , the 3D printing system 10 includes a tray rack 101 and a 3D printer 102 connected to the tray rack 101 .

[0079] The tray rack 101 includes a feed / return device 1011, a barrel shaft 1012, and a tray rack body 1013. The barrel shaft 1012 may include a sleeve and a fixed tube, wherein the sleeve is detachably connected to the fixed tube of the tray rack 101. The barrel shaft 1012 is used to suspend or support the tray 103. A material line 104 is wound around the tray 103. This material line 104 can be supplied to the 3D printer through the feed / return device 1011, or returned to the tray 103 through the feed / return device 1011. In other words, the feed / return device 1011 can be used for both feeding and withdrawing material.

[0080] The 3D printer 102 includes a print head 1021, which includes a material guide unit 10211, a nozzle 10212, and an extrusion assembly disposed between the material guide unit 10211 and the nozzle 10212. The extrusion assembly also serves as a material feed and return device. During the material feed process from the tray rack 101, the material line 104 passes through the material guide unit 10211 and then enters the extrusion assembly, which delivers the material line 104 to the nozzle 10212. During the material return process from the tray rack 101, the 3D printer 102 cuts the material line 104 in the print head 1021, and the extrusion assembly delivers the material line 104 to the tray rack 101. The material feed and return device 1011 in the tray rack 101 returns the material line 104 to the tray 103.

[0081] Optionally, the 3D printer 102 can, for example, cut the material line 104 between the extrusion assembly and the nozzle 10212 or can cut the material line 104 in the extrusion assembly, etc. This application does not limit the position where the 3D printer cuts the printing material.

[0082] Exemplarily, the 3D printer 102 also includes a print panel 1023, a heated bed 1024, and a base 1025. The heated bed 1024 is located on the side of the base 1025 facing the nozzle 1022 and has a heating function. The print panel 1023 is located on the side of the heated bed 1024 facing the nozzle 1022. Heat from the heated bed 1024 is transferred to the print panel 1023, allowing the nozzle 1022 to extrude molten printing material onto the print panel 1023.

[0083] In a specific implementation, the 3D printer adjusts the temperatures of the nozzle 1022 and the heated bed 1024 based on the material information of the filament 104. The temperature of the nozzle 1022 is adjusted to heat the filament 104 to a molten state, and the temperature of the heated bed 1024 is adjusted to adhere the filament 104 extruded from the nozzle 1022 to the printing panel 1023. The print head 1021 is slidably connected to the first guide rail 1026 and can move along the length of the first guide rail 1026, thereby achieving a printing path of the 3D printer 102 along the length of the first guide rail 1026. The heated bed 1024 is slidably connected to the second guide rail 1027 and can move along the length of the second guide rail 1027, thereby achieving a printing path of the 3D printer 102 along the length of the second guide rail 1027. The length of the second guide rail 1027 is perpendicular to the length of the first guide rail 1026. Furthermore, the first guide rail 1026 is slidably connected to the third guide rail 1028. By moving the first guide rail 1026 along the third guide rail 1028, the 3D printer 102 can achieve a printing path perpendicular to the length of the second guide rail 1027 and the length of the first guide rail 1026. In other words, the 3D printer 102 can achieve three mutually perpendicular printing paths to print a three-dimensional object.

[0084] In the embodiment of the present application, the structure of the material tray rack can assist the feeding and withdrawing of materials in the material line, and multiple 3D printing material trays can be placed on the material tray rack.

[0085] The structure of the tray rack is described in detail below with reference to FIG. 2 to FIG. 7 b .

[0086] Referring to FIG2 , FIG2 is a schematic structural diagram of a material tray rack according to an embodiment of the present application, and the material tray rack may include:

[0087] Tray rack body 1.

[0088] At least two barrel shafts 2 are connected to the tray frame 1, wherein one barrel shaft 2 is used to place a 3D printing tray.

[0089] At least two feeding and withdrawing devices 3 are fixed on the material tray frame 1; wherein each feeding and withdrawing device 3 includes an extrusion mechanism and is used to transport the material line in the 3D printing material tray on the corresponding barrel rotating shaft 2 to the 3D printer, or to withdraw the material line into the 3D printing material tray on the corresponding barrel rotating shaft 2.

[0090] In a specific implementation process, the barrel shaft 2 can be rotatably connected to the tray frame body 1 or fixedly connected.

[0091] Specifically, the barrel shaft 2 may include a sleeve and a fixed tube, wherein the sleeve is sleeved outside the fixed tube and is used to suspend or support the 3D printing material tray.

[0092] Specifically, the barrel shaft 2 may also include a sleeve instead of a fixed tube. The connection between the barrel shaft 2 and the tray frame body 1 may be understood as the barrel shaft 2 being directly connected to the tray frame body 1, or the barrel shaft 2 being indirectly connected to the tray frame body 1 through a fixed tube.

[0093] The barrel shaft 2 can rotate relative to the tray rack body 1, which can be understood as: the sleeve is rotatably connected to the fixed tube, and the fixed tube is fixed to the tray rack body 1; or, the sleeve is fixedly connected to the fixed tube, and the fixed tube is rotatably connected to the tray rack body 1; or, the sleeve is rotatably connected to the fixed tube, and the fixed tube is rotatably connected to the tray rack body 1, or, the sleeve is fixedly connected to the fixed tube, and the fixed tube is fixed to the tray rack body 1.

[0094] The term "connection" includes both detachable and non-detachable connections. For example, a fixed connection may include both a detachable fixed connection and a non-detachable fixed connection, a rotational connection may include both a detachable rotational connection and a non-detachable rotational connection, and a sliding connection may include both a detachable sliding connection and a non-detachable sliding connection. Connections may also be direct or indirect via a component. For example, a detachable fixed connection refers to a connection in which the positional relationship between at least two connected objects can be fixed in the installed state. Similarly, rotational connections and sliding connections may be used as examples.

[0095] In order to ensure that the material line in the 3D printing material tray can be stably moved from the 3D printing material tray to the print head of the 3D printer, or stably returned to the 3D printing material tray, the embodiment of the present application proposes a material tray rack including a feeding and withdrawing device. The feeding and withdrawing device arranged on the material tray rack assists the feeding and withdrawing of the feeding and withdrawing device of the 3D printer, which can effectively avoid the problem of no material line available to the print head due to insufficient extrusion force of the extrusion mechanism, or the problem that the material line returned to the 3D printing material tray cannot be returned to the 3D printing material tray normally, thereby improving the efficiency and stability of feeding and withdrawing materials of the 3D printer.

[0096] In an embodiment of the present application, the tray rack may include a tray rack body 1, which can be used to accommodate the barrel shaft 2 and the feed and withdraw device 3; the shape of the tray rack can be set according to actual conditions, for example: a rectangular parallelepiped, a cube, an ellipsoid, etc., and the tray rack body 1 can be flat, etc., and the embodiment of the present application does not limit this.

[0097] The tray rack may also include a barrel shaft 2 for accommodating a 3D printing tray. Each barrel shaft 2 can accommodate one 3D printing tray. The barrel shaft 2 may be connected to the tray rack body 1. Specifically, the axis of the barrel shaft 2 is perpendicular to a surface of the tray rack body 1 where the connection between the barrel shaft 2 and the tray rack body 1 is located. The barrel shaft 2 can rotate relative to the tray rack body 1 so that it rotates with the 3D printing tray when the 3D printing tray rotates, thereby reducing friction and resistance on the 3D printing tray.

[0098] In one possible implementation, when a user uses a 3D printer to print an object, he or she may need to use material lines of different colors and materials, and material lines of different colors and materials correspond to different 3D printing material trays; in order to improve the efficiency of 3D printing, the barrel shaft 2 can include at least two, and different barrel shafts 2 can be used to store material lines of different colors and materials; in this way, the material tray racks of at least two barrel shafts 2 can hold at least two 3D printing material trays, and the material lines stored in these at least two 3D printing material trays can be of different colors and / or different materials, and the embodiments of the present application do not limit this.

[0099] The feeding and withdrawing devices in the material tray rack may also include at least two; specifically, at least two barrel rotating shafts correspond one to one with at least two feeding and withdrawing devices; that is: one feeding and withdrawing device corresponds to one barrel rotating shaft, and one feeding and withdrawing device passes through the material line in the 3D printing material tray placed on the corresponding barrel rotating shaft.

[0100] The extrusion mechanism can be equipped with a motor, a gear set, etc.; the motor drives the gear set to rotate, and the material line between the gear sets is moved toward the print head or toward the 3D printing material tray under the rotation of the gear set to complete the feeding or withdrawal of the material line. Compared with relying solely on the extrusion mechanism in the print head to complete the feeding and withdrawal of the material line, the embodiment of the present application also relies on the feeding and withdrawal device provided on the material tray frame, which can make the feeding and withdrawal of the material line more stable.

[0101] In one embodiment of the present application, although at least two barrel rotating shafts can enable the 3D printer to achieve 3D printing of material lines of different colors and materials, it will increase the space occupied by the material tray rack. In order to reduce the space occupied by the at least two barrel rotating shafts and the at least two feeding and withdrawing devices, in one example, the at least two barrel rotating shafts and the two feeding and withdrawing devices can be arranged with reference to the following positions:

[0102] At least two barrel rotating shafts include barrel rotating shafts distributed on both sides of the material tray frame body, and at least two feeding and withdrawing devices include feeding and withdrawing devices distributed on both sides of the material tray frame body, wherein each feeding and withdrawing device corresponds to the barrel rotating shaft located on the same side.

[0103] Specifically, at least two barrel rotating shafts can be distributedly arranged on both sides of the tray rack body to fully utilize the space on different sides of the tray rack body; for any barrel rotating shaft, its axis can be perpendicular to the side of the connected tray rack body.

[0104] In addition, the at least two feed and withdraw devices can also be distributed like the barrel shaft; that is, the at least two feed and withdraw devices can also be distributed on both sides of the tray rack body. For any feed and withdraw device, it can correspond to the barrel shaft on the same side of the tray rack body; that is, the feed and withdraw device can be embedded in the material line of the 3D printing tray placed on the barrel shaft on the same side of the tray rack body.

[0105] In one embodiment of the present application, at least two barrel rotating shafts and two feeding and withdrawing devices can be specifically arranged with reference to the following positions:

[0106] The at least two barrel rotating shafts include two barrel rotating shafts located on one side of the material tray frame, and the at least two feeding and withdrawing devices include two feeding and withdrawing devices located on the same side as the two barrel rotating shafts, and the two feeding and withdrawing devices are located between the two barrel rotating shafts.

[0107] As shown in Figure 3, at least two barrel shafts 4 may include two barrel shafts 4 located on the same side of the tray frame body 5, and the two barrel shafts 4 may be arranged at intervals on the same side of the tray frame body 5; accordingly, the two feed and withdraw devices 6 corresponding to the two barrel shafts 4 may also be arranged on this side of the tray frame body 5 to reduce the distance between the 3D printing tray and the feed and withdraw device 6, thereby reducing the distance the material line travels; and, placing the barrel shaft 4 and the feed and withdraw device 6 on the same side of the tray frame body 5 can reduce the bending of the material line between the 3D printing tray and the feed and withdraw device 6, which not only makes the tray frame more concise, but also reduces the friction of the material line feeding and withdrawing, thereby improving the stability of the material line feeding and withdrawing.

[0108] In one possible implementation, the two feeding and withdrawing devices 6 on the same side can be located between the two barrel shafts 4 on that side; on the one hand, it can make the entire material tray rack tidier, so that the material lines are delivered to the 3D printer from similar positions, avoiding multiple material lines from being delivered to the printer from different positions, thereby causing waste of space; on the other hand, it can also avoid the feeding and withdrawing devices 6 being too far away from the corresponding barrel shaft 4, causing the material line to travel too long a distance.

[0109] As an example, two feeding and withdrawing devices are located in the center of the tray rack body 5.

[0110] As an example, two barrel shafts 4 on the same side are located at both ends of the tray frame 5 .

[0111] As an example, the two barrel shafts on the same side of the tray rack can be set up according to the following positions:

[0112] Among the two barrel rotating shafts on one side of the tray rack body, the axis of one barrel rotating shaft is higher than the axis of the other barrel rotating shaft.

[0113] As shown in Figure 4, among the two barrel rotating shafts 8 on the same side of the tray rack body 7, the axis of one barrel rotating shaft 8 can be set to be higher than the axis of the other barrel rotating shaft 8; compared with the parallel setting, the high and low setting can reduce the space occupied by the two barrel rotating shafts 8 in the horizontal direction.

[0114] In one embodiment of the present application, the tray rack may further include:

[0115] The support legs are fixedly connected to the bottom of the material tray rack body, and the support legs are used to support the material tray rack body.

[0116] In a possible implementation, as shown in FIG5 , the bottom of the tray rack body 9 of the tray rack can be fixedly connected to a supporting leg 10 so as to support the tray rack body 9 through the supporting leg 10 .

[0117] As an example, one end of the support bracket is fixedly connected to the bottom of the material tray rack, and the other end of the support bracket is fixed to the 3D printer.

[0118] The supporting legs can support the material tray rack body on the 3D printer; wherein, the supporting legs can be fixedly connected to the bottom of the material tray rack body at one end, and fixedly connected to the 3D printer at the other end; the other end of the supporting legs can be fixed at different positions of the 3D printer according to actual conditions, for example: it can be fixed to the top of the 3D printer, or to the side of the 3D printer, and the embodiments of the present application do not limit this.

[0119] For example, as shown in FIG6 , at least two barrel shafts 12 are provided on either side of the tray rack body 11, with one barrel shaft 12 on one side arranged higher than the other. A feeding and withdrawing device 13 is provided between the two barrel shafts 12 on one side and fixed to the tray rack body 11. The bottom of the tray rack body 11 is connected to a support leg 14.

[0120] In some feasible embodiments, for any of the at least two feeding and withdrawing devices, the feeding port of any feeding and withdrawing device is downward, and the discharging port of any feeding and withdrawing device is upward; or, the feeding port of any feeding and withdrawing device is upward, and the discharging port of any feeding and withdrawing device is downward.

[0121] Optionally, to reduce the turning of the material line's moving path, the orientation of the feed and discharge ports of the feed and discharge device can be set based on the vertical height of the print head and the vertical height of the feed and discharge device. The feed port is connected to the material line of the 3D printing cartridge, and the discharge port is connected to the print head.

[0122] For example: as shown in Figure 7a, when the print head 19 is higher than the feed and return device 20, the feed and return ports of the feed and return device 20 can be set as: the feed port 21 is downward and the discharge port 22 is upward; as shown in Figure 7b, when the print head 23 is lower than the feed and return device 24, the feed and return ports of the feed and return device 24 can be set as: the feed port 25 is upward and the discharge port 26 is downward.

[0123] In one embodiment of the present application, the feeding and withdrawing device may include:

[0124] Motor;

[0125] A driving gear is connected to the motor, and the motor is used to drive the driving gear to rotate;

[0126] The driven gear is spaced apart from the driving gear, and the driving gear and the driven gear are used to cooperate to clamp the material line output from the 3D printing material tray.

[0127] In some feasible embodiments, as shown in Figure 8, the feeding and withdrawing device 15 may include a motor 17 that drives a driving gear 18 to rotate, and the driving gear 18 may be connected to the motor shaft of the motor 17; the driven gear 19 may be spaced apart from the driving gear 18, and the gap may be less than or equal to the diameter of the material line 20; the driving gear 18 and the driven gear 19 may cooperate with each other to clamp the material line 20 in the gap, and during the rotation of the driving gear 18, based on the friction between the driving gear 18 and the material line 20, and the pressure applied to the material line 20 by the driven gear 19 and the driving gear 18, the material line 20 is delivered to the print head or returned to the 3D printing material tray.

[0128] Exemplarily, a speed sensor 21 can be additionally provided in the feed and retract device 15, and the speed sensor 21 can be used to measure the rotational speed information of the motor 17 and the movement information of the material line 20; in the embodiment of the present application, the theoretical movement information of the material line can be determined based on the rotational speed information of the motor, and by comparing the theoretical movement information of the material line with the movement information of the material line actually collected, it is automatically detected whether the material line is slipping.

[0129] In some feasible embodiments, the feeding and withdrawing device of the tray rack may further include:

[0130] The reduction transmission system is connected to the motor shaft of the motor; the output gear of the reduction transmission system is meshed with the driving gear.

[0131] In the embodiment of the present application, to prevent the motor from applying excessive torque to the driving gear, which would result in excessively fast material feed and withdrawal speeds, a reduction transmission system can be provided between the motor and the driving gear. Specifically, as shown in FIG9 , the motor shaft of motor 22 can be connected to driving gear 24 via reduction transmission system 23 ; wherein the output gear of reduction transmission system 23 can mesh with driving gear 24 . Thus, the torque actually output by motor 22 to driving gear 24 is a controlled torque. By implementing the embodiment of the present application, the material feed and withdrawal speeds of the material line can be controlled.

[0132] In some feasible implementations, the speed sensor may include:

[0133] The motor-side Hall effect sensor is used to measure the motor's rotational speed. For example, the motor is provided with a magnet that rotates with the motor. The magnet can be located inside the motor or attached to the motor's surface. Alternatively, the motor can be made of materials including, but not limited to, magnets.

[0134] The Hall effect speed sensor at the feed line is used to measure the rotational speed of the driven gear. For example, the driven gear is provided with a magnet that rotates with the driven gear. The magnet can be provided on the surface of the driven gear; alternatively, the driven gear can be made of materials including, but not limited to, magnets.

[0135] Among them, a motor-end Hall speed sensor can be set for the motor. This motor-end Hall speed sensor can obtain motor speed information by measuring the speed of a magnet set on the motor and rotating with the motor. The material line-end Hall speed sensor set for the material line can measure the speed of a magnet set on the driven gear and rotating with the driven gear.

[0136] Optionally, a motor-end Hall speed sensor may be provided in an area near the motor, specifically for sensing the rotation speed of the motor.

[0137] Alternatively, the Hall speed sensor at the end of the material line can be set in the vicinity of the driven gear, specifically for sensing the rotation speed of the driven gear. Since the movement information of the material line is proportional to the speed information of the driven gear, after obtaining the speed information of the driven gear, the movement information of the material line can be determined based on the speed information.

[0138] In some embodiments, as shown in FIG10 , the tray rack may further include:

[0139] The control component 25 is connected to the motor 26 and the speed sensor 27;

[0140] The control component 25 is used to receive the speed information of the motor 26 and the movement information of the material line sent by the speed sensor 27; and to send control information to the motor 26.

[0141] The control component can be a control component of the feeding and withdrawing device, or a control component set for the material tray rack, and the embodiment of the present application does not limit this.

[0142] Exemplarily, the speed sensor 27 includes a motor-end Hall speed sensor and a feed line-end Hall speed sensor.

[0143] The control component can be connected to the motor and the speed sensor; the control component connected to the speed sensor can obtain the motor speed information and the material line movement information from the speed sensor, and detect whether the material line is slipping based on the speed information and the movement information. Of course, the control component can also send the speed information and the movement information to other control units to identify and detect whether the material line is slipping, and the embodiment of the present application does not limit this. Specifically, detecting whether the material line is slipping based on the speed information and the movement information includes: determining the speed of the driving gear based on the speed information, determining the speed of the driven gear based on the movement information, and determining that the material line is slipping when the speed of the driving gear is greater than the speed of the driven gear.

[0144] When the control component determines that the material line is slipping, it can send control information to the motor to stop the operation of the motor; when the control component determines that the material line is not slipping, it can control the motor to continue to operate according to the previous control parameters. The embodiment of the present application does not limit this.

[0145] In a feasible embodiment, if other control units identify and detect whether the material line is slipping, the control component can send control information to the motor to stop the operation of the motor after receiving information indicating that the material line is slipping.

[0146] On the other hand, an embodiment of the present application further provides a 3D printer, which may include any one of the material tray racks described above, wherein the material tray rack body of the material tray rack may be fixedly connected to the frame of the 3D printer and provide a material line to the 3D printer.

[0147] In some feasible implementations, the tray rack body can be fixed on the frame of the 3D printer by screws.

[0148] Optionally, in some feasible implementations, the tray rack body can be fixed to the frame of the 3D printer by means of a snap connection.

[0149] Referring to Figure 11 , Figure 11 is another schematic diagram of the three-dimensional structure of a material tray rack provided in an embodiment of the present application. As shown in Figure 11 , the material tray rack 110 shown in Figure 11 includes a material tray rack body 1101 , at least two material drum reels, such as material drum reel 1102a and material drum reel 1102b, and a support leg 1103 .

[0150] One end of the support leg 1103 is fixedly connected to the bottom of the tray rack body 1101, and the other end of the support leg 1103 is fixed to the frame of the 3D printer. For example, as shown in Figure 12, the tray rack 110 can be fixed to the crossbeam 1104 of the 3D printer.

[0151] Different from the material tray rack described in Figures 1 to 10, the material tray rack 110 provided in the embodiment of the present application is not provided with a material feeding and retreating device, and the extrusion component in the 3D printer can be used to help the material line to advance and retreat.

[0152] In some feasible embodiments, the support leg 1103 may include a rotating component and a fixed component, wherein one end of the rotating component is fixedly connected to the bottom of the material tray rack body, and the other end of the rotating component is rotatably connected to one end of the fixed component; the other end of the fixed component is fixed on the 3D printer.

[0153] In this application, the tray rack can be rotated relative to the 3D printer, and a 3D printing tray is placed on the tray rack. After the printing material on the 3D printing tray is used up, the user can rotate the tray rack to a comfortable position to change the material. This not only saves space in the 3D printer, but also facilitates the user's material changing operation.

[0154] The structure of the supporting stand is exemplarily described below with reference to FIG. 13 a to FIG. 13 c .

[0155] Referring to Figure 13a, Figure 13a is a schematic diagram of the structure of a support stand provided in an embodiment of the present application. As shown in Figure 13a, the support stand 1103 includes a rotating component 11031 and a fixed component 11032. One end of the rotating component 11031 is fixedly connected to the bottom of the tray holder body 1101, and the other end of the rotating component 11031 is rotatably connected to one end of the fixed component 11032. The other end of the fixed component 11032 is fixed to the 3D printer.

[0156] In this application, the tray rack can be rotated relative to the 3D printer, and a 3D printing tray is placed on the tray rack. After the printing material on the 3D printing tray is used up, the user can rotate the tray rack to a comfortable position to change the material. This not only saves space in the 3D printer, but also facilitates the user's material changing operation.

[0157] For example, see Figure 13b, which is an exploded view of a support stand provided in an embodiment of the present application. As shown in Figure 13b, the support stand 1103 includes a rotating component 11031 and a fixed component 11032; wherein the rotating component 11031 is provided with a first connecting groove, and the fixed component 11032 is provided with a boss.

[0158] One end of the rotating component 11031 is fixedly connected to the bottom of the material tray rack body 1101, and the other end of the rotating component 11031 is rotatably connected to the boss of the fixed component 11032 through the first connecting groove. The end of the rotating component 11031 facing away from the boss is fixed on the 3D printer.

[0159] For example, the first connecting groove is a directional groove, which is aligned with the boss and installed at a certain angle to achieve the rotational connection between the rotating component 11031 and the fixed component 11032. In some other feasible embodiments, a connecting member such as a roller or a pulley can be used to achieve the rotational connection between the two.

[0160] Optionally, in some feasible embodiments, the support bracket further includes a locking member disposed at the rotational connection between the rotating component and the fixed component; the locking member is configured to prevent the rotating component from rotating relative to the fixed component when locked, or to allow the rotating component to rotate relative to the fixed component when released. In the present application, the locking member is used to switch the rotational enable between the rotating component and the fixed component, thereby allowing the material tray rack to rotate relative to the 3D printer, or to fix the material tray rack relative to the 3D printer when it is required.

[0161] For example, in Figures 13a to 13c, the locking member 11033 is a bolt. The rotating member 11031 is provided with a fixing hole on the side wall of the first connecting groove, and the fixing member 11032 is provided with a fixing groove on the side of the boss corresponding to the fixing hole. When the fixing hole and the fixing groove are coaxial along the length of the barrel rotating axis, the locking state of the locking member 11033 locks the rotating member 11031 and the fixing member 11032, and the loosening state of the locking member 11033 loosens the rotating member 11031 and the fixing member 11032. When the locking member 11033 is in the loosening state, the rotating member 11031 can be rotated, so that the supporting leg 1103 can be changed from the state shown in Figure 13a to the state shown in Figure 13c. At this time, the material tray rack 110 can be rotated from the state shown in Figure 11 to the state shown in Figure 14.

[0162] Furthermore, in some feasible embodiments, the tray rack further includes a rotation angle limiter, which is disposed between the rotating component and the fixed component. For example, as shown in Figures 13b and 13c , the fixed component 11032 has a limit groove on its surface facing the rotating component 11031; the rotating component 11031 has a limit hole on its surface facing the fixed component 11032; and the support leg 1103 further includes a limit block 11034, which passes through the limit hole and slides within the limit groove. This restricts the limit block 11034 to sliding only within the limit groove, thereby limiting the rotation angle of the rotating component 11031. Optionally, the limit groove is arc-shaped.

[0163] In an embodiment of the present application, a rotation angle limiter is provided to limit the rotation angle of the tray rack relative to the 3D printer, thereby preventing the tray rack from rotating too much relative to the 3D printer and pulling the printing material transported to the 3D printer by the 3D printing tray.

[0164] Optionally, in some feasible embodiments, at least one of the rotating component and the fixed component is provided with a rotation angle limiter. For example, the rotating component may have a limit protrusion on the surface facing the fixed component, and the fixed component may have a limit groove on the surface facing the rotating component. Alternatively, the rotating component may have a limit groove on the surface facing the fixed component, and the fixed component may have a limit protrusion on the surface facing the rotating component. In this case, the limit protrusion can slide within the limit groove, thereby driving the rotating component to rotate relative to the fixed component. In other words, the rotation angle of the rotating component is limited by limiting the sliding angle of the limit protrusion within the limit groove.

[0165] In the embodiments of the present application, a rotation angle limiter is provided on the rotating and / or fixed components to limit the rotation angle of the tray holder relative to the 3D printer. This prevents the tray holder from rotating too far relative to the 3D printer, potentially pulling on the printing material being fed to the 3D printer. Furthermore, the rotation angle limiter is part of the rotating and / or fixed components, which reduces the number of supporting legs and makes the tray holder more compact.

[0166] In some feasible embodiments, the 3D printer has a gantry structure, which includes a crossbeam 1104. FIG11 shows that the other end of a support leg 1103 is detachably secured to the 3D printer frame, with the other end of the support leg 1103 specifically connected to the crossbeam 1104. The tray rack body 1101 is plate-shaped and secured to the crossbeam 1104 at the other end of the support leg 1103. The plane in which the tray rack body 1101 lies is inclined relative to the plane formed by the crossbeam 1104 and the 3D printer's columns.

[0167] For example, at least two barrel rotating shafts are provided on one side of the tray rack body 1101 in the y-axis direction. Taking the example of two barrel rotating shafts being provided on one side of the tray rack body 1101 along the y-axis direction, the axes of the at least two barrel rotating shafts can be on the same horizontal line, that is, the axes of the barrel rotating shafts are perpendicular to the tray rack body.

[0168] The length of the crossbeam 1104 also extends along the y-axis, and the columns of the 3D printer are arranged along the z-axis. In this case, the plane formed by the columns and crossbeam 1104 is the oyz plane, where o represents the origin of the xyz coordinate system. The plane on which the tray rack is located is inclined to the oyz plane.

[0169] The implementation of this application can increase the moving space of the print head of the 3D printer, and avoid interference with the printing of the print head on the z-axis when the material tray rack is fixed on the beam, thereby affecting the printing quality.

[0170] In this application, the printing material in the 3D printing tray is transferred to the 3D printer via a material tube, that is, the material tube connects the tray rack and the 3D printer. The tray rack's support legs are fixed to the 3D printer's crossbeam, and the material tube will bend. Implementing this application can increase the bending radius of the material tube, thereby reducing the resistance of the material line in the material tube.

[0171] Alternatively, in some feasible embodiments, referring to FIG15 , FIG15 is another schematic diagram of a three-dimensional structure of a material tray rack provided in an embodiment of the present application. As shown in FIG15 , the material tray rack 150 shown in FIG15 includes a material tray rack frame 1501, at least two material drum reels, such as material drum reel 1502a and material drum reel 1502b, and a support leg 1503.

[0172] One end of the support leg 1503 is fixedly connected to the bottom of the tray rack body 1501, and the other end of the support leg 1503 is fixed to the frame of the 3D printer. For example, as shown in Figure 12, the tray rack 150 can be fixed to the crossbeam 1504 of the gantry of the 3D printer.

[0173] The material tray frame 150 also includes a material feed and withdrawal device corresponding to each barrel shaft, a material line guide frame 1505 and a material pipe 1506. Among them, the material pipe 1506 is arranged between the material tray frame 150 and the 3D printer, specifically connecting the material feed and withdrawal port of the material feed and withdrawal device with the print head of the 3D printer.

[0174] A material line guide 1505 is positioned at the inlet or outlet of at least one feed / return device. The material line guide 1505 includes an opening for the material pipe to pass through. The line connecting the opening of the material line guide and the inlet or outlet is perpendicular to the plane of the inlet or outlet. For example, a section of the material pipe between the material line guide 1505 and the inlet or outlet can be perpendicular to the plane of the inlet or outlet. This allows the material line to be transported perpendicular to the inlet or outlet, reducing the resistance to the material line passing through the pipe.

[0175] The supporting stand 1503 in the embodiment of the present application can refer to the supporting stand described in Figures 11 to 14, and will not be described again here.

[0176] When the supporting legs rotate, the tray rack 110 can be rotated from the state shown in FIG. 15 to the state shown in FIG. 16 .

[0177] As can be seen, although Figures 1 and 12 illustrate two 3D printers of different structures, both depict a tray rack equipped with at least two barrel shafts and support legs, allowing the tray rack, holding the 3D printing tray, to be secured to the 3D printer. This means that the tray rack provided in this application is adaptable to 3D printers of varying structures, and this application does not restrict the specific 3D printer structure to which the tray rack may be applied. For example, the 3D printer structure may include at least one of a gantry, cantilever, box, and delta configurations.

[0178] It should be noted that the above terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0179] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A material tray rack for a 3D printer, characterized in that: include: Tray rack body; At least two barrel shafts are connected to the tray frame, wherein one barrel shaft is used to place a 3D printing tray; A support bracket is fixedly connected to the bottom of the tray rack body, and the support bracket is used to support the tray rack body; wherein one end of the support bracket is fixedly connected to the bottom of the tray rack body, and the other end of the support bracket is fixed to the 3D printer.

2. The tray rack according to claim 1, characterized in that: The tray rack also includes: At least two feeding and withdrawing devices are fixed on the material tray frame; wherein each feeding and withdrawing device includes an extrusion mechanism and is used to convey the material line in the 3D printing material tray on the corresponding barrel rotating shaft to the 3D printer, or to withdraw the material line into the 3D printing material tray on the corresponding barrel rotating shaft.

3. The tray rack according to claim 2, characterized in that: Each of the feeding and withdrawing devices comprises a feeding and withdrawing port, and the feeding and withdrawing port is used to connect the material pipe that transmits the material line; The material tray frame also includes a material line guide frame, which is arranged at at least one material feeding and withdrawing device, and the material line guide frame includes an opening for the material pipe to pass through; The connection line between the opening of the material line guide frame and the feed and withdraw opening is perpendicular to the plane where the feed and withdraw opening is located.

4. The tray rack according to claim 2 or 3, characterized in that: The at least two barrel rotating shafts include barrel rotating shafts distributed on both sides of the tray frame body, and the at least two feeding and withdrawing devices include feeding and withdrawing devices distributed on both sides of the tray frame body, wherein each feeding and withdrawing device corresponds to the barrel rotating shaft located on the same side.

5. The tray rack according to any one of claims 2 to 4, characterized in that: The at least two barrel rotating shafts include two barrel rotating shafts located on one side of the material tray frame, and the at least two feeding and withdrawing devices include two feeding and withdrawing devices located on the same side as the two barrel rotating shafts, and the two feeding and withdrawing devices are located between the two barrel rotating shafts.

6. The tray rack according to claim 5, characterized in that: Among the two barrel rotating shafts on one side of the material tray rack body, the axis of one barrel rotating shaft is higher than the axis of the other barrel rotating shaft.

7. The tray rack according to any one of claims 2 to 6, characterized in that: The at least two barrel rotating shafts correspond one to one with the at least two feeding and withdrawing devices.

8. The tray rack according to any one of claims 2 to 7, characterized in that: For any one of the at least two feeding and withdrawing devices, the feeding port of any one of the feeding and withdrawing devices is downward, and the discharging port of any one of the feeding and withdrawing devices is upward; Alternatively, the feed port of any of the feed and withdraw devices is upward, and the discharge port of any of the feed and withdraw devices is downward.

9. The tray rack according to any one of claims 2 to 8, characterized in that: Also includes: The control component is used to control the feeding and withdrawing device to provide the material line in the 3D printing material tray on the corresponding barrel rotating shaft to the 3D printer, or control the feeding and withdrawing device to withdraw the material line to the 3D printing material tray on the corresponding barrel rotating shaft.

10. The tray rack according to any one of claims 2 to 9, characterized in that: The feeding and withdrawing device comprises: Motor; A driving gear connected to the motor, the motor is used to drive the driving gear to rotate; The driven gear is spaced apart from the driving gear, and the driving gear and the driven gear are used to cooperate and clamp the material line output by the 3D printing material tray.

11. The tray rack according to claim 10, characterized in that: The feeding and withdrawing device also includes: A reduction transmission system is connected to the motor shaft of the motor; the output gear of the reduction transmission system is meshed with the driving gear.

12. The tray rack according to claim 10 or 11, characterized in that: The feeding and withdrawing device also includes: The motor-side Hall speed sensor is used to measure the speed information of the motor; The Hall speed sensor at the feed line end is used to measure the rotation speed information of the driven gear.

13. The tray rack according to any one of claims 1 to 12, characterized in that: The at least two barrel rotating shafts are connected to the material tray rack body, including: the at least two barrel rotating shafts are connected to the material tray rack body through a fixed tube, the at least two barrel rotating shafts are rotatably connected to the fixed tube, and the fixed tube is fixedly connected to the material tray rack body.

14. The tray rack according to any one of claims 1 to 13, characterized in that: The support frame includes a rotating part and a fixed part; wherein, One end of the rotating component is fixedly connected to the bottom of the tray frame, and the other end of the rotating component is rotatably connected to one end of the fixed component; The other end of the fixing component is fixed on the 3D printer.

15. The tray rack according to any one of claims 1 to 14, characterized in that: The supporting leg also includes a locking member, which is arranged at the rotation connection between the rotating member and the fixed member; The locking member is used to prevent the rotating component from rotating relative to the fixed component in a locked state, or to allow the rotating component to rotate relative to the fixed component in a released state.

16. The tray stand according to claim 14 or 15, characterized in that: The supporting bracket further comprises a rotation angle limiting member, and the rotation angle limiting member is arranged between the rotating member and the fixing member.

17. The tray stand according to claim 14 or 15, characterized in that: At least one of the rotating component and the fixed component is provided with a rotation angle limiter.

18. The tray rack according to any one of claims 1 to 17, characterized in that: The other end of the supporting tripod is detachably fixed to the frame of the 3D printer.

19. The tray rack according to any one of claims 1 to 18, characterized in that: The structure of the 3D printer is a gantry structure; the material tray frame is plate-shaped; The other end of the supporting tripod is fixed on the crossbeam of the 3D printer, and the plane where the material tray rack body is located is inclined to the plane formed by the column of the 3D printer and the crossbeam.

19. A 3D printer, comprising: The material tray rack as described in any one of claims 1 to 18, wherein the material tray rack body of the material tray rack is fixedly connected to the frame of the 3D printer.

20. A 3D printer system, characterized in that: It comprises a 3D printer and a material tray rack as described in any one of claims 1-18.

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