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

Abstract

The utility model provides a material tray frame for a 3D printer, the 3D printer and a 3D printing system. The material tray frame comprises a material tray frame body, a material tray and a material tray, the at least two charging barrel rotating shafts are connected with the tray rack body, and one charging barrel rotating shaft is used for placing one 3D printing tray; the supporting foot stool is fixedly connected with the bottom of the tray rack body, and the supporting foot stool is used for supporting the tray rack body; wherein one end of the supporting foot stool is fixedly connected with the bottom of the tray rack body, and the other end of the supporting foot stool is fixed on the 3D printer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of the Chinese patent application filed with the China Patent Office on August 25, 2023, with application number CN202322307959.7 and application name “Panel rack for 3D printer, 3D printer and 3D printing system”, and claims the priority of 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

[0003] 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

[0004] 3D printer, also known as three-dimensional printer, stereo printer, is a kind of rapid prototyping process equipment, usually realized by digital technology printing materials. 3D printer uses PLA (Polylactic acid, polylactic acid), ABS (Acrylonitrile Butadiene Styrene plastic) and other material wires as printing raw materials, and the material wires are usually wound into rolls on the material tray for user convenience.

[0005] In order 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. Utility Model Content

[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 shafts are connected to the tray frame, wherein one barrel shaft is used to place a 3D printing tray;

[0010] 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.

[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 embodiment of the present application, multiple 3D printing material trays can be placed on the material tray rack at the same time; and the feeding and withdrawing device can provide force to the material line, so that even if the material tray rack is placed far away from the 3D printer, there will be no insufficient extrusion force for feeding or withdrawing the material. Even if the distance between the material line in the 3D printing material tray and the 3D printer is far, the material line can be transported to the 3D printer or returned to the 3D printer material tray because the feeding and withdrawing device is provided on the material tray rack.

[0014] In combination with the first aspect or any one 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 a material pipe that transmits the material line;

[0015] 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 a material pipe to pass through;

[0016] 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. The implementation of the present application enables the material line to be transmitted perpendicular to the feed and withdraw opening, thereby 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 feed and withdraw devices include feed and withdraw devices distributed on both sides of the tray rack body, wherein each feed and withdraw device corresponds to the barrel rotating shaft located on the same side.

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

[0019] In combination with the first aspect or any one 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, of 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 two barrel rotating shafts on one side one high and one low, the space occupied by the 3D printing material tray placed on the two barrel rotating 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 of the above possible implementations, in a seventh possible implementation, for any one of the at least two feed and withdraw devices, the feed port of any one of the feed and withdraw devices is downward, and the discharge port of any one of the feed and withdraw devices is upward; or, the feed port of any one of the feed and withdraw devices is upward, and the discharge port of any one of the feed and withdraw devices is downward.

[0025] In combination with the first aspect or any of the above possible implementations, in an eighth possible implementation, the following 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 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.

[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 one of the above possible implementations, in a ninth possible implementation, the material feeding and withdrawing device includes:

[0029] Motor;

[0030] A driving gear connected to the motor, 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 material 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 material feeding and withdrawing device further includes:

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

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

[0038] In an embodiment of the present application, the rotation 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 rotation speed information of the driven gear; then, based on the movement information of the material line and the rotation 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 one 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 stand 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 frame, 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 the present application, the tray rack body 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 change the material by rotating the tray rack body to a comfortable position. This not only saves space for 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 bracket further includes a locking member, and 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, and the rotation angle limiter 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 the embodiment of the present application, by providing a rotation angle limiter on the rotating component and / or the fixed component, the rotation angle of the tray rack relative to the 3D printer is limited to prevent the tray rack from rotating too much relative to the 3D printer, thereby preventing the printing material conveyed to the 3D printer by the 3D printing tray from being pulled.

[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 tripod is detachably fixed to a frame of the 3D printer.

[0051] In the present 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 one of the above possible implementations, in an eighteenth possible implementation, the structure of the 3D printer is a gantry structure; the material tray frame is plate-shaped;

[0053] 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.

[0054] In the present application, the printing material in the 3D printing material tray is transmitted to the 3D printer through the material tube, that is, the material tube connects the material tray frame and the 3D printer. When the support legs of the material tray frame are fixed on the crossbeam of the 3D printer, the material tube will bend. By implementing the present application, the bending radius of the material tube can be increased, 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 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] Figure 1 A schematic diagram of a scenario of a 3D printing system provided in an embodiment of the present application;

[0059] Figure 2 A schematic diagram of the planar structure of the material tray rack provided in an embodiment of the present application;

[0060] Figure 3 A schematic diagram of the planar structure of the material tray rack provided in an embodiment of the present application;

[0061] Figure 4 A schematic diagram of the planar structure of the material tray rack provided in an embodiment of the present application;

[0062] Figure 5 A schematic diagram of the planar structure of the material tray rack provided in an embodiment of the present application;

[0063] Figure 6 A schematic diagram of the three-dimensional structure of a material tray rack provided in an embodiment of the present application;

[0064] Figure 7a A schematic diagram of the planar structure of a material feeding and withdrawing device provided in an embodiment of the present application;

[0065] Figure 7b A schematic diagram of the planar structure of a material feeding and withdrawing device provided in an embodiment of the present application;

[0066] Figure 8 A schematic diagram of the planar structure of a material feeding and withdrawing device provided in an embodiment of the present application;

[0067] Fig. 9 A schematic diagram of the planar structure of a material feeding and withdrawing device provided in an embodiment of the present application;

[0068] Fig.10 A schematic diagram of the planar structure of a material feeding and withdrawing device provided in an embodiment of the present application;

[0069] Fig.11 A schematic diagram of another three-dimensional structure of a material tray rack provided in an embodiment of the present application;

[0070] Fig.12 A schematic diagram of another scenario of a 3D printing system provided in an embodiment of the present application;

[0071] Fig.13a A schematic diagram of a structure of a support stand provided in an embodiment of the present application;

[0072] Fig.13b An exploded view of a support stand provided in an embodiment of the present application;

[0073] Fig.13c A rotation state diagram of a support stand provided in an embodiment of the present application;

[0074] Fig.14 for Fig.11 A rotation state diagram of the tray rack shown in FIG.

[0075] Fig.15 A schematic diagram of another three-dimensional structure of a material tray rack provided in an embodiment of the present application;

[0076] Fig.16 for Fig.15 A rotation state diagram of the tray rack is shown in FIG. DETAILED DESCRIPTION

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

[0078] See also Figure 1 , Figure 1 A schematic diagram of a 3D printing system provided in an embodiment of the present application. Figure 1 As shown, the 3D printing system 10 includes a material tray rack 101 and a 3D printer 102 connected to the material tray rack 101 .

[0079] The tray rack 101 includes a material feeding and withdrawing 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, and the barrel shaft 1012 is used to suspend or support the tray 103. A material line 104 is wound around the tray 103, and the material line 104 can be provided to the 3D printer through the material feeding and withdrawing device 1011, or the material line 104 can be withdrawn to the tray 103 through the material feeding and withdrawing device 1011. That is, the material feeding and withdrawing device 1011 can be used for feeding and withdrawing.

[0080] The 3D printer 102 includes a print head 1021, wherein the print head 1021 includes a material guide unit 10211, a nozzle 10212, and an extrusion assembly disposed between the material guide unit 10211 and the nozzle 10212, and the extrusion assembly is also a material feeding and withdrawing device. During the feeding process of the material tray rack 101, the material line 104 passes through the material guide unit 10211 and then enters the extrusion assembly, and the extrusion assembly supplies the material line 104 to the nozzle 10212; during the withdrawing process of the material tray rack 101, the 3D printer 102 cuts off the material line 104 in the print head 1021, the extrusion assembly conveys the material line 104 to the material tray rack 101, and the material feeding and withdrawing device 1011 in the material tray rack 101 withdraws the material line 104 back to the material tray 103.

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

[0082] Exemplarily, the 3D printer 102 further includes a printing panel 1023, a heat bed 1024 and a base 1025. The heat bed 1024 is disposed on a side of the base 1025 facing the nozzle 1022, and the heat bed 1024 has a heating function. The printing panel 1023 is disposed on a side of the heat bed 1024 facing the nozzle 1022, and the heat of the heat bed 1024 can be transferred to the printing panel 1023, and the nozzle 1022 can extrude the molten printing material onto the printing panel 1023.

[0083] In a specific implementation, the 3D printer adjusts the temperature of the nozzle 1022 and the hot bed 1024 according to the material information of the material line 104, adjusts the temperature of the nozzle 1022 to heat the material line 104 to a molten state, and adjusts the temperature of the hot bed 1024 to adhere the material line 104 extruded by the nozzle 1022 to the printing panel 1023. The print head 1021 is slidably connected to the first guide rail 1026, and the print head 1021 can move along the length direction of the first guide rail 1026, that is, the 3D printer 102 realizes the printing path along the length direction of the first guide rail 1026, and the hot bed 1024 is slidably connected to the second guide rail 1027, and the 3D printer 102 moves along the length direction of the second guide rail 1027, that is, the 3D printer 102 realizes the printing path along the length direction of the second guide rail 1027, and the length direction of the second guide rail 1027 is perpendicular to the length direction of the first guide rail 1026. Furthermore, the first guide rail 1026 is slidably connected to the third guide rail 1028, and the 3D printer 102 can realize a printing path in a direction perpendicular to the length of the second guide rail 1027 and a direction perpendicular to the length of the first guide rail 1026 by moving the first guide rail 1026 along the third guide rail 1028. That is, the 3D printer 102 can realize three mutually perpendicular printing paths to print out 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] Combine the following Figures 2 to 7b The structure of the material tray rack is introduced in detail.

[0086] Reference Figure 2 , Figure 2 This is a schematic diagram of the structure of a material tray rack in an embodiment of the present application. The material tray rack may include:

[0087] Material 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 convey the material line in the 3D printing material tray on the corresponding barrel shaft 2 to the 3D printer, or to withdraw the material line into the 3D printing material tray on the corresponding barrel shaft 2.

[0090] In the specific implementation process, the barrel shaft 2 can be rotatably connected to the tray frame body 1, or can be 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, and the connection between the barrel shaft 2 and the tray rack body 1 may be understood as the barrel shaft 2 being directly connected to the tray rack body 1, or the barrel shaft 2 being indirectly connected to the tray rack body 1 via a fixed tube.

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

[0094] The connection includes a detachable connection and an inseparable connection. For example, a fixed connection may include a detachable fixed connection and an inseparable fixed connection, a rotating connection may include a detachable rotating connection and an inseparable rotating connection, and a sliding connection may include a detachable sliding connection and an inseparable sliding connection. The connection may also be a direct connection or an indirect connection through a component. For example, a detachable fixed connection refers to a state in which the positional relationship between at least two connected objects can be fixed in the installed state; similar examples include a rotating connection, a sliding connection, etc.

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

[0097] The tray rack may further include a barrel shaft 2 for placing a 3D printing tray, and one barrel shaft 2 may be used to place 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 may rotate relative to the tray rack body 1, so that when the 3D printing tray rotates, it rotates with the 3D printing tray, thereby reducing the friction and resistance of 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 may include at least two, and different barrel shafts 2 may 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 may be used to hold at least two 3D printing material trays, and the material lines stored in the at least two 3D printing material trays may be of different colors and / or different materials, and the embodiments of the present application do not impose any restrictions on this.

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

[0100] The extrusion mechanism may be provided with a motor, a gear set, etc.; the motor drives the gear set to rotate, and the material line between the gear sets moves 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 set 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 realize 3D printing of material lines of different colors and materials, the space occupied by the material tray frame will be increased; in order to reduce the space occupied by at least two barrel rotating shafts and at least two feeding and withdrawing devices, in one example, at least two barrel rotating shafts and 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 tray frame body, and 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.

[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 feeding and withdrawing devices can also be distributed like the barrel shaft; that is, the at least two feeding and withdrawing devices can also be distributed on both sides of the tray frame. For any feeding and withdrawing device, it can correspond to the barrel shaft on the same side of the tray frame; that is, the feeding and withdrawing 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 frame.

[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 body, 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] like Figure 3 As shown, at least two barrel rotating shafts 4 may include two barrel rotating shafts 4 located on the same side of the tray frame body 5, and the two barrel rotating shafts 4 may be arranged at intervals on the same side of the tray frame body 5; accordingly, two feeding and withdrawing devices 6 corresponding to the two barrel rotating 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 feeding and withdrawing device 6, thereby reducing the distance traveled by the material line; and, placing the barrel rotating shaft 4 and the feeding and withdrawing 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 feeding and withdrawing 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 feed and withdraw devices 6 on the same side can be located between the two barrel shafts 4 on that side; on the one hand, the entire material tray rack can be made neater, so that the material lines can be delivered to the 3D printer from similar positions, avoiding multiple material lines from being delivered to the printer from different positions, thereby wasting space; on the other hand, it can also avoid the feed and withdraw device 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 at the center of the tray rack body 5.

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

[0111] As an example, the two barrel shafts on the same side of the tray rack body can be set 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] like Figure 4 As shown, 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 arranged to be higher than the axis of the other barrel rotating shaft 8; relative to the parallel arrangement, the one high and one low arrangement 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 bracket is fixedly connected to the bottom of the material tray rack body, and the support bracket is used to support the material tray rack body.

[0116] In one possible implementation, Figure 5 As shown, the bottom of the tray rack body 9 of the tray rack can be fixedly connected to a supporting foot frame 10 so as to support the tray rack body 9 through the supporting foot frame 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 on the 3D printer.

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

[0119] For example, Figure 6 As shown, at least two barrel shafts 12 are respectively arranged on both sides of the material tray frame 11, and the two barrel shafts 12 on one side are arranged one high and one low; the feeding and retracting device 13 is arranged in the middle of the two barrel shafts 12 on one side and fixed on the material tray frame 11. The bottom of the material tray frame 11 is connected to the supporting foot frame 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, in order to reduce the turning of the material line moving path, the direction of the feed port and the discharge port 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 material box, and the discharge port is connected to the print head.

[0122] For example: Figure 7a As shown, when the print head 19 is higher than the feeding and withdrawing device 20, the feeding and withdrawing device 20 can be set to have the feeding port 21 facing downward and the discharging port 22 facing upward; Figure 7b As shown, when the print head 23 is lower than the feeding and withdrawing device 24, the feeding and discharging ports of the feeding and withdrawing device 24 can be set as follows: the feeding port 25 is upward and the discharging 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 in clamping the material line output by the 3D printing material tray.

[0127] In some possible implementations, such as Figure 8 As shown, the feeding and retracting 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 rotation 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 rotation speed information of the motor, and by comparing the theoretical movement information of the material line with the actually collected movement information of the material line, it is automatically detected whether the material line is slipping.

[0129] In some feasible implementations, 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, in order to prevent the motor from applying excessive torque to the driving gear, which causes the material line to advance and retreat too quickly, a reduction transmission system can be provided between the motor and the driving gear; specifically, Fig. 9 As shown, the motor shaft of the motor 22 can be connected to the driving gear 24 through the reduction transmission system 23; wherein, the output gear of the reduction transmission system 23 can mesh with the driving gear 24. Therefore, the torque actually output by the motor 22 to the driving gear 24 is the controlled torque; by implementing the embodiment of the present application, the speed of feeding and retracting the material line can be controlled.

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

[0133] The motor end Hall speed sensor is used to measure the speed information of the motor. For example, the motor is provided with a magnet that rotates with the motor, and the magnet can be arranged inside the motor or attached to the surface of the motor; or the raw materials of the motor can include but are not limited to magnets.

[0134] The Hall speed sensor at the feed line end is used to measure the rotation speed information of the driven gear. Exemplarily, the driven gear is provided with a magnet that rotates with the driven gear, and the magnet can be provided on the surface of the driven gear; or, the raw material of the driven gear includes but is not limited to a magnet.

[0135] Among them, a motor-end Hall speed sensor can be set for the motor, and the motor-end Hall speed sensor can obtain the 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 Hall speed sensor at the motor end may be arranged in an area near the motor, specifically for sensing the rotation speed of the motor.

[0137] Alternatively, a 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 rotation speed information of the driven gear, after obtaining the rotation speed information of the driven gear, the movement information of the material line can be determined based on the rotation speed information.

[0138] In some embodiments, Fig.10 As shown, the tray rack may also include:

[0139] A control component 25 connected to a motor 26 and a 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 material feeding and withdrawing device, or a control component arranged 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 transfer of the driven gear based on the movement information, and determining the 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 implementation, 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, and 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 material tray rack body can be fixed on the frame of the 3D printer by screws.

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

[0149] See also Fig.11 , Fig.11 This is another three-dimensional structural schematic diagram of the material tray rack provided in the embodiment of the present application. Fig.11 As shown, Fig.11 The material tray rack 110 shown in FIG. 1 includes a material tray rack frame body 1101 , at least two cartridge reels such as cartridge reel 1102 a and cartridge reel 1102 b , and a supporting stand 1103 .

[0150] One end of the support bracket 1103 is fixedly connected to the bottom of the tray frame 1101, and the other end of the support bracket 1103 is fixed to the frame of the 3D printer. Fig.12 As shown, the material tray rack 110 can be fixed on the beam 1104 of the 3D printer.

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

[0152] In some feasible embodiments, the supporting bracket 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 the present application, the tray rack body 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 change the material by rotating the tray rack body to a comfortable position. This not only saves space for the 3D printer, but also facilitates the user's material changing operation.

[0154] Combine the following Figures 13a to 13c The structure of the supporting stand is exemplified.

[0155] See also Fig.13a , Fig.13a A structural schematic diagram of a support stand provided in an embodiment of the present application. Fig.13a As shown, the support bracket 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 frame 1101, and the other end of the rotating component 11031 is rotatably connected to one end of the fixed component 11032, and the other end of the fixed component 11032 is fixed on the 3D printer.

[0156] In the present application, the tray rack body 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 change the material by rotating the tray rack body to a comfortable position. This not only saves space for the 3D printer, but also facilitates the user's material changing operation.

[0157] For example, see Fig.13b , Fig.13b This is an exploded view of the support stand provided in the embodiment of the present application. Fig.13b As shown, the support bracket 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, and the end of the rotating component 11031 away from the boss is fixed on the 3D printer.

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

[0160] Optionally, in some feasible implementations, the support bracket further includes a locking member, which is disposed at the rotational connection between the rotating member and the fixed member; the locking member is used to prevent the rotating member from rotating relative to the fixed member in a locked state, or to allow the rotating member to rotate relative to the fixed member in a loosened state. In the present application, the locking member is used to switch the rotation enable between the rotating member and the fixed 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.

[0161] For example, Figures 13a to 13c Taking the locking member 11033 as a bolt, for example, 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 direction of the barrel rotating shaft, the locking state of the locking member 11033 is to lock the rotating member 11031 and the fixing member 11032, and the loosening state of the locking member 11033 is to loosen 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 support leg 1103 can be moved away from the rotating member 11031. Fig.13a The status shown in becomes Fig.13c In the state shown in FIG. 1 , the tray rack 110 can be moved from Fig.11 The state shown in the figure rotates into Fig.14 The status shown in .

[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. Fig.13b and Fig.13c As shown, the fixed part 11032 is provided with a limiting groove on the surface facing the rotating part 11031; the rotating part 11031 is provided with a limiting hole on the surface facing the fixed part 11032; the supporting bracket 1103 also includes a limiting block 11034, which passes through the limiting hole and slides in the limiting groove, that is, by limiting the limiting block 11034 to slide only in the limiting groove, the rotation angle of the rotating part 11031 is limited. Optionally, the limiting 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 implementations, at least one of the rotating component and the fixed component is provided with a rotation angle limiter. For example, the rotating component is provided with a limit protrusion on the surface facing the fixed component, and the fixed component is provided with a limit groove on the surface facing the rotating component, or the rotating component is provided with a limit groove on the surface facing the fixed component, and the fixed component is provided with a limit protrusion on the surface facing the rotating component. In this case, the limit protrusion can slide in the limit groove, thereby driving the rotating component to rotate relative to the fixed component, that is, the rotation angle of the rotating component is limited by limiting the sliding angle of the limit protrusion in the limit groove.

[0165] In the embodiment of the present application, by setting a rotation angle limiter on the rotating component and / or the fixed component, the rotation angle of the material tray rack relative to the 3D printer is limited to prevent the material tray rack from rotating too much relative to the 3D printer, thereby preventing the 3D printing material tray from being pulled to the 3D printer. In addition, the rotation angle limiter is part of the rotating component and / or the fixed component, which can reduce the parts supporting the tripod and make the material tray rack more compact.

[0166] In some feasible implementations, the 3D printer is a gantry structure, and the gantry of the 3D printer includes a crossbeam 1104, Fig.11 The figure shows that the other end of the support bracket 1103 is detachably fixed to the frame of the 3D printer, and the other end of the support bracket 1103 is specifically connected to the crossbeam 1104. The material tray rack body 1101 is plate-shaped, and the other end of the support bracket 1103 is fixed to the crossbeam 1104, and the plane where the material tray rack body 1101 is located is inclined to the plane formed by the crossbeam 1104 and the column of the 3D printer.

[0167] For example, at least two barrel rotating shafts are arranged on one side of the tray rack body 1101 in the y-axis direction. Taking the example of two barrel rotating shafts are arranged on one side of the tray rack body 1101 in 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 beam 1104 also extends along the y-axis direction, and the column of the 3D printer is arranged along the z-axis direction. At this time, the plane formed by the column and the beam 1104 is the oyz plane, and o represents the origin in the xyz coordinate system. Then the plane where the tray rack body is located is inclined to the oyz plane.

[0169] The implementation of the present 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 the present application, the printing material in the 3D printing material tray is transmitted to the 3D printer through the material tube, that is, the material tube connects the material tray frame and the 3D printer. The support legs of the material tray frame are fixed on the crossbeam of the 3D printer, and the material tube will bend. By implementing the present application, the bending radius of the material tube can be increased, thereby reducing the resistance of the material line in the material tube.

[0171] Optionally, in some feasible implementations, reference Fig.15 , Fig.15 This is another three-dimensional structural schematic diagram of the material tray rack provided in the embodiment of the present application. Fig.15 As shown, Fig.15 The material tray rack 150 shown in the figure includes a material tray rack frame 1501 , at least two cartridge reels such as cartridge reel 1502a and cartridge reel 1502b , and a supporting stand 1503 .

[0172] One end of the support bracket 1503 is fixedly connected to the bottom of the tray frame 1501, and the other end of the support bracket 1503 is fixed to the frame of the 3D printer. Fig.12 As shown, the material tray rack 150 can be fixed on the crossbeam 1504 of the gantry of the 3D printer.

[0173] The material tray frame 150 also includes a material feeding and withdrawing 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 feeding and withdrawing port of the material feeding and withdrawing device and the print head of the 3D printer.

[0174] The material line guide frame 1505 is arranged at the inlet and outlet of at least one inlet and outlet device, and the material line guide frame 1505 includes an opening for the material pipe to pass through. The line between the opening of the material line guide frame and the inlet and outlet is perpendicular to the plane where the inlet and outlet are located. Exemplarily, at this time, a section of the material pipe between the material line guide frame 1505 and the inlet and outlet can be perpendicular to the plane where the inlet and outlet are located, that is, the material line can be transmitted perpendicular to the inlet and outlet, reducing the inlet and outlet resistance of the material line in the material pipe.

[0175] The supporting stand 1503 in the embodiment of the present application can refer to Figures 11 to 14 The supporting tripod described is not described in detail here.

[0176] When the support legs rotate, the tray rack 110 can be moved from Fig.15 The state shown in the figure rotates into Fig.16 The status shown in .

[0177] It can be seen that Figure 1 and Fig.12 The two 3D printers shown have different structures, but Figure 1 and Fig.12 The tray rack shown in the figure is provided with at least two barrel rotating shafts and supporting legs, and the tray rack with the 3D printing tray can be fixed on the 3D printer. That is, the tray rack provided by the present application can be respectively applicable to 3D printers of different structures, and the present application does not limit the structure type of the 3D printer to which the tray rack is specifically applied. For example, the structure of the 3D printer can be at least one of a gantry structure, a cantilever structure, a box structure and a delta structure.

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

[0179] The above disclosure is only the preferred embodiment of the present application, which 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 frame 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 rack 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.

20. A 3D printer, characterized in that: include: 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.

21. 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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