Switching mechanism, consumable conveying device and three-dimensional forming equipment

Abstract

The utility model provides a switching mechanism, a consumable conveying device and three-dimensional forming equipment. The switching mechanism comprises a plurality of gear shifting positions, and the gear shifting positions comprise a working gear and a non-working gear; the switching mechanism further comprises an acting piece and a position switch, and the acting piece is used for interacting with the position switch when the switching mechanism is located at the non-working gear position so that the position switch can send out a return-to-zero signal. Therefore, the control program can accurately and quickly confirm the action of moving the switching mechanism from the non-working gear position to each working gear position, the control program is simplified, and the control accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a switching mechanism, a consumable material conveying device and a three-dimensional forming device. Background Art

[0002] In a 3D printer that sprays consumables, the consumables are continuously transferred to the print head, which melts the consumables and drives the print head to move relative to the printing platform through a power mechanism. The consumables are sprayed according to the outline of the printed model, and the three-dimensional model is formed by stacking layer by layer. The color and material of the model are determined by the consumables. In order to meet the diverse needs of printing models, a variety of consumables can be used for printing at the same time.

[0003] In the prior art, in order to achieve printing, a consumable conveying device is usually provided to transfer the consumables to the print head, and the consumables are returned after printing is completed. In order to accurately realize the feeding and returning operations, the control program of the current consumable conveying device is relatively complicated. Utility Model Content

[0004] In view of this, the utility model provides a switching component, a consumable material conveying device and a three-dimensional molding device, wherein the control program can accurately and quickly confirm the action of moving the switching mechanism from a non-working gear position to each working gear position, thereby simplifying the control program and improving the control accuracy.

[0005] The first aspect of the utility model provides a switching mechanism, which includes multiple shift positions, including a working gear and a non-working gear; the switching mechanism also includes an action member and a position switch, and the action member is used to interact with the position switch when the switching mechanism is in the non-working gear position, so that the position switch sends a zeroing signal.

[0006] A second aspect of the present invention provides a consumable material conveying device, comprising: a switching mechanism according to any one of the first aspects.

[0007] A third aspect of the present invention provides a three-dimensional molding device, comprising: a switching mechanism according to any one of the first aspects; or a consumable material conveying device according to any one of the second aspects.

[0008] The switching assembly, consumable material conveying device and three-dimensional molding equipment provided by the embodiments of the utility model, the switching mechanism includes multiple shift positions, the shift position includes a working gear and a non-working gear, thereby, by controlling a component of the switching mechanism to switch to different shift positions, the feeding and withdrawing operations can be realized, and at the same time, the acting member is used to interact with the position switch when the switching mechanism is in the non-working position, so that the position switch sends a zeroing signal, so that the control program can accurately and quickly confirm the action of moving the switching mechanism from the non-working gear position to each working gear position, further simplifying the control program, which is conducive to improving the accuracy of control.

[0009] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0011] Figure 1 A schematic structural diagram of a partial structure of a material box provided by an embodiment of the utility model at a first viewing angle;

[0012] Figure 2 A schematic diagram of the structure of a switching mechanism of a material box provided by an embodiment of the utility model when it is at the zero position;

[0013] Figure 3 for Figure 2 A partial enlarged view of the material box in area A shown;

[0014] Figure 4 A schematic diagram of the structure of a limiting device provided in an embodiment of the utility model;

[0015] Figure 5 A schematic diagram of the explosion structure of a limiting device provided in an embodiment of the utility model;

[0016] Figure 6 A schematic diagram of the structure of a switching component provided by an embodiment of the utility model at a first viewing angle;

[0017] Figure 7 A schematic diagram of the structure of a switching component provided by an embodiment of the utility model at a second viewing angle;

[0018] Figure 8A schematic structural diagram of a switching component in a third perspective provided in an embodiment of the utility model.

[0019] in, Figures 1 to 8 The corresponding relationship between the reference numerals and the component names is as follows:

[0020] 10 material tray, 100 switching mechanism, 110 switching assembly, 111 transmission group, 1112 second gear, 1113 third gear, 112 reversing seat, 1122 first avoidance, 1124 second avoidance, 113 rotating group, 114 second elastic member, 115 first protective cover, 116 second protective cover, 120 switching shaft, 121 first limiting surface, 130 shifting turntable, 131 limiting concave surface, 132 second limiting surface, 150 action member, 160 first synchronous wheel, 310 first shaft, 320 first sub-gear, 330 second synchronous wheel, 400 second driving part, 510 second shaft, 511 second sub-gear, 610 third shaft, 700 bracket, 810 limit device, 811 mounting seat, 8111 slot, 8112 avoidance groove, 812 elastic member, 8121 connecting frame, 8122 first elastic member, 8123 avoidance passage, 8124 plug rod, 8123 avoidance through hole, 813 rolling member, 820 position switch, 20 main housing. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] Refer to the following Figures 1 to 8 The switching mechanism 100, the consumable conveying device and the three-dimensional forming equipment provided according to some embodiments of the utility model are described. The three-dimensional forming equipment can be a consumable spraying 3D printer. The consumable conveying device can be applied to the three-dimensional forming equipment to realize the loading or unloading of consumables. The switching mechanism 100 is applied to the consumable conveying device to put the consumable conveying device in a loading state or a unloading state, thereby realizing the loading and unloading of consumables.

[0023] like Figure 1 and Figure 2 As shown, in the first aspect of the utility model, a switching mechanism 100 is provided, which is used for a consumable conveying device of a three-dimensional molding device. The switching mechanism 100 includes a plurality of shift positions, and the shift positions include a working gear and a non-working gear. The switching mechanism 100 also includes an action member 150 and a position switch 820. The action member 150 is used to interact with the position switch 820 when the switching mechanism 100 is in a non-working position, so that the position switch 820 sends a zeroing signal.

[0024] Among them, the three-dimensional molding device may include a material tray 10, the switching mechanism 100 corresponds to the material tray 10, and the working shift position of the switching mechanism 100 may correspond to the feeding and withdrawing state of the consumables on the material tray 10, that is, when the switching mechanism 100 is in the working shift position, the switching mechanism 100 cooperates with other mechanisms of the consumable conveying device, such as the first shaft 310 and the second shaft 510 of the consumable conveying device, to achieve the feeding or withdrawing of the consumables on the corresponding material tray 10. When the switching mechanism 100 is in the non-working shift position, the consumable conveying device is neither in the feeding state nor in the withdrawing state. It can be understood that the consumable conveying device can be in the zero position at this time.

[0025] Thus, by controlling the switching mechanism 100 to switch to different shift positions, such as controlling the switching mechanism 100 to be in different working gear positions, the feeding and withdrawing state of the consumable conveying device can be switched. Compared with the related art that requires controlling different extrusion mechanisms to achieve feeding and withdrawing state switching, the control procedure is simplified, which is conducive to improving the accuracy of control, and further conducive to improving the accuracy and timeliness of material change. At the same time, integrating multiple extruders into a material change mechanism simplifies the structure, making the structure more compact and simple, which is conducive to saving the manufacturing cost of the consumable conveying device.

[0026] Among them, Figure 2 and Figure 3 As shown, when the switching mechanism 100 is in the non-working gear position, the action member 150 interacts with the position switch 820 to make the position switch 820 send a zeroing signal. The consumable conveying device can know that the feeding and withdrawing device is not in the feeding and withdrawing state according to the zeroing signal, and the position of the switching mechanism 100 in this posture can be recorded as the zero point position, as shown in FIG. Figure 2 and Figure 3 As shown, the position of the switching mechanism 100 when the action member 150 interacts with the position switch 820 is recorded as the zero position of the switching mechanism 100. Since the relative positions of the various shift positions on the switching mechanism 100 and the action member 150 are known during the design process, that is, the various shift positions and the zero position of the switching mechanism 100 are known during the design process, when the consumable conveying device knows that the switching mechanism 100 is at the zero position, the control program can accurately and quickly confirm the action of moving the switching mechanism 100 from the non-working gear position to the working gear position, such as the control program can accurately and quickly confirm the rotation angle of the switching mechanism 100 from the zero position to each position of the feeding state or the withdrawing state corresponding to the feeding and withdrawing device, thereby enabling the consumable conveying device to accurately and quickly realize the feeding and withdrawing operation, further simplifying the control program and improving the control accuracy.

[0027] The position switch 820 may be a touch switch, or other switch that meets the requirements. The consumable material conveying device may include a bracket 700 , and the touch switch or the actuator 150 may be arranged on the bracket 700 .

[0028] like Figure 1 As shown, in some possible embodiments provided by the present invention, the switching mechanism 100 also includes a switching shaft 120 and a switching assembly 110, and the switching shaft 120 is configured to be rotatable. It can be understood that the switching mechanism 100 also includes a linkage member, which may include a switching shaft 120 and a first driving part connected to the switching shaft 120 and driving the switching shaft 120 to rotate, and the first driving part drives the switching shaft 120 to rotate.

[0029] The switching assembly 110 is installed on the switching shaft 120. The switching assembly 110 includes a feed position, a return position and a zero position. When the switching mechanism 100 is in any working gear position, the switching assembly 110 is in a feed position or a return position. When the switching mechanism 100 is in a non-working gear position, the switching assembly 110 is in a zero position. Any shift position corresponds to a different position on the axial projection of the switching shaft 120.

[0030] That is to say, the working gear and non-working gear of the switching mechanism 100 are distributed at different positions on the axial projection of the switching shaft 120, and the feeding and withdrawing position of the switching assembly 110 corresponds to the working gear of the switching mechanism 100. Therefore, the first driving unit drives the switching shaft 120 to rotate and change the position of the switching shaft 120, so that the parts of the switching shaft 120 corresponding to different gear positions in the circumferential direction can pass through the same position on the bracket 700 in sequence. That is to say, by driving the switching shaft 120 to rotate by the first driving unit, the switching between the working gears and non-working gears of the switching mechanism 100 can be realized, and then the feeding and withdrawing position and the zeroing position of the switching assembly 110 can be switched. The operation is simple and easy to use. Compared with the control program in the related art that needs to control different extrusion mechanisms, the control program is simplified.

[0031] like Figure 1 As shown, specifically, the first driving unit can drive the switching shaft 120 to rotate in both directions, such as the first driving unit can drive the switching shaft 120 to rotate clockwise and counterclockwise. Specifically, the first driving unit can be a motor, and the first driving unit is connected to the switching shaft 120 through a transmission unit, and the transmission unit can be a synchronous belt transmission mechanism, or other mechanisms that meet the requirements. When the transmission unit is a synchronous belt transmission, the switching shaft 120 is provided with a first synchronous wheel 160 for connecting with the synchronous belt.

[0032] like Figure 1As shown, in some possible embodiments provided by the present invention, the switching mechanism 100 further includes: a shifting dial 130, the shifting dial 130 is coaxially connected to the switching shaft 120, one of the actuating member 150 and the position switch 820 is disposed on the shifting dial 130, and the other of the actuating member 150 and the position switch 820 is installed at the assembly position. It can be understood that the switching mechanism 100 can include a bracket 700, and the assembly position can be on the bracket 700, that is, the other of the actuating member 150 and the position switch 820 can be installed on the bracket 700.

[0033] Among them, the setting of the shift dial 130 provides a setting position for the action member 150 or the position switch 820. When one of the action member 150 or the position switch 820 is set on the shift dial 130, the shift dial 130 will rotate synchronously with the switching shaft 120, and will drive one of the action member 150 and the position switch 820 to rotate relative to the other. As a result, the switching shaft 120 rotates to a suitable position, and the action member 150 will interact with the position switch 820 to cause the position switch 820 to send a zeroing signal.

[0034] In some possible embodiments, the actuator 150 is disposed on the shift dial 130 and protrudes from a circumferential side wall of the shift dial 130 .

[0035] Therefore, when the shift dial 130 rotates synchronously with the switching shaft 120, the actuating member 150 will be driven to rotate synchronously. Since the actuating member 150 protrudes from the circumferential side wall of the shift dial 130, the switching shaft 120 rotates to a suitable position, and the actuating member 150 will accurately interact with the position switch 820 to cause the position switch 820 to send a return to zero signal.

[0036] Specifically, the action member 150 and the shift dial 130 may be of a separate structure, and the action member 150 may be fixed to a suitable position of the shift dial 130, such as by bonding, welding, screwing, etc., so that the action member 150 may be replaced separately when the action member 150 is worn or damaged, thereby reducing maintenance costs. Figure 3 As shown, the actuating member 150 and the shift dial 130 may be an integrated structure. For example, the actuating member 150 may be a protruding structure on the circumference of the shift dial 130. This method is easy to process, simplifies the assembly process, and helps reduce manufacturing costs.

[0037] like Figure 2 and Figure 3As shown, in some possible embodiments provided by the present invention, a first limiting surface 121 is provided on the circumferential side surface of the end of the switching shaft 120; a first mounting hole compatible with the switching shaft 120 is opened at the center of the shift dial 130, and a second limiting surface 132 is provided on the side wall of the first mounting hole. The first limiting surface 121 and the second limiting surface 132 cooperate to limit the rotation of the shift dial 130 relative to the switching shaft 120.

[0038] Among them, the aperture of the first mounting hole can match the shaft diameter of the switching shaft 120. The switching shaft 120 is passed through the first mounting hole, and the first limiting surface 121 and the second limiting surface 132 are opposite and in contact with each other, so that the shift dial 130 and the switching shaft 120 can be assembled, so that the shift dial 130 can rotate synchronously with the switching shaft 120 under the action of the first limiting surface 121 and the second limiting surface 132, with a simple structure and easy disassembly and assembly.

[0039] Among them, the first limiting surface 121 and the second limiting surface 132 can be a planar structure, that is, the end of the switching shaft 120 is D-shaped, and the first mounting hole is a D-shaped hole. Among them, the shaft with a D-shaped end and the D-shaped hole on the shift assembly are convenient for processing, easy to produce, and have reliable limiting, which is suitable for popularization and application.

[0040] It is understandable that the shift dial 130 can also be fixed to the switch shaft 120 by other structures. For example, after the installation of the switch shaft 120 and the shift dial 130 is completed, the shift dial 130 can be fixed to the switch shaft 120 by using adhesives, baffles, etc. to reduce the possibility of the shift dial 130 moving axially along the switch shaft 120 and improve the reliability of the connection between the shift dial 130 and the switch shaft 120.

[0041] like Figure 2 and Figure 3 As shown, in some possible embodiments provided by the present invention, the switching mechanism 100 also includes: a limit device 810, and a plurality of limit portions corresponding to the shift positions are opened on the circumference of the shift dial 130, and the limit portions interact with the limit device 810 to enable the switching shaft 120 to maintain the current shift position.

[0042] Among them, the limit parts opened on the circumferential side of the shift dial 130 correspond to the shift positions, that is, each shift position corresponds to a limit part, and the limit parts are distributed on the circumferential side of the shift dial 130. Therefore, when the switching mechanism 100 is in any shift position, the corresponding limit parts and the limit device 810 interact with each other, so that the switching shaft 120 can be maintained in the current shift position, so as to reduce the possibility of shaking and rotating the switching shaft 120, so that the switching mechanism 100 can be stably and accurately maintained in the current shift position, thereby ensuring the reliability of the feeding operation or the returning operation, and the accuracy of the zero point position confirmation, so as to improve the accuracy and reliability of the switching of each gear of the switching mechanism 100.

[0043] In an optional embodiment, the number of limit parts is equal to the number of shift positions, that is, the sum of the number of working gears and non-working gears is equal to the number of limit parts, wherein the switching mechanism 100 may include a plurality of switching components 110, the number of working gears may be an even number, including the same number of feed gears and return gears, that is, the feed and return positions of each switching component 110 include a feed position and a return position, and the number of non-working gears may be one.

[0044] like Figure 4 and Figure 5 As shown, in some possible embodiments provided by the present invention, the limiting device 810 includes: a mounting seat 811 and an elastic member 812, the first end of the elastic member 812 is connected to the mounting seat 811, the second end of the elastic member 812 abuts against the shift dial 130, and the elastic member 812 is configured to provide a force to the second end to abut against the shift dial 130, and retract in a direction close to the first end when the force applied to the second end reaches a first preset requirement.

[0045] In this embodiment, the elastic member 812 is configured as an elastically retractable structure, and the elastic member 812 is configured to provide a force to the second end to abut against the shift dial 130, so that when the shift dial 130 rotates to a position corresponding to a different gear position, the second end of the elastic member 812 always abuts against the shift dial 130, thereby enabling the limiting device 810 to always abut against the shift dial 130 to achieve a good and reliable limiting effect. At the same time, the elastic member 812 is configured to retract toward the first end when the force applied to the second end reaches the first preset requirement, thereby ensuring that the shift dial 130 can smoothly switch from the current shift position to the next shift position by synchronously rotating with the switching shaft 120, and avoiding the problem that the second end of the elastic member 812 jams the shift dial 130 so that the shift dial 130 cannot rotate smoothly. It is understandable that the first preset requirement of the force can be reasonably set according to the specific structure of the elastic member 812 and the shift dial 130 to avoid the situation where the elastic member 812 jams the shift dial 130 and makes it unable to rotate. At the same time, it is ensured that the elastic member 812 can abut against the shift dial 130 to ensure a good limiting effect.

[0046] Further, one of the limiting part and the positioning part is a limiting concave surface, and the other is a limiting convex surface, thereby, through the cooperation of the limiting concave surface and the limiting convex surface, a good limiting effect can be achieved to ensure that the shifting dial 130 can reliably and stably maintain the current shifting position. It can be understood that the limiting part and the positioning part can also be other structures.

[0047] Specifically, the limiting portion may be a limiting concave surface 131, and the positioning portion may be a limiting convex surface, and the limiting convex surface may be directly set on the second end of the elastic member 812, or the positioning portion may be a limiting concave surface, and the limiting portion may be a limiting convex surface, and the limiting concave surface may be directly set on the second end of the elastic member 812.

[0048] In some possible embodiments, the second end is provided with or formed with a positioning portion that cooperates with the limiting portion, and the positioning portion contacts the limiting portion to keep the shift dial 130 at the current shift position, thereby keeping the switch shaft 120 at the current shift position, so as to reduce the possibility of the switch shaft 120 shaking or rotating. When the force exerted by the shift dial 130 on the second end reaches the first preset requirement, the positioning portion and the limiting portion corresponding to the current shift position are switched from the contact state to the separation state, that is, there is no limiting effect between the positioning portion and the limiting portion corresponding to the current shift position, so that the shift dial 130 can rotate synchronously with the switch shaft to realize the shifting operation of the switching mechanism 100. It can be understood that when the shift dial 130 rotates to a position corresponding to the next shift position, the positioning portion can contact the limiting portion corresponding to the next shift position to continue to realize the limiting effect, so that the switch shaft 120 can be stably and reliably kept at the next shift position.

[0049] like Figure 4 and Figure 5 As shown, in some other possible embodiments, the limiting device 810 further includes a rolling member 813, which is rotatably connected to the second end of the elastic member 812, that is, the rolling member 813 is rotatable relative to the second end of the elastic member 812. At the same time, at least part of the circumferential side surface of the rolling member 813 abuts against the limiting portion; wherein the circumferential side surface of the rolling member 813 is provided with a positioning portion that cooperates with the limiting portion, and the positioning portion contacts the limiting portion, so that the shifting dial 130 maintains the current shifting position, so that the switching shaft 120 can maintain the current shifting position, so as to reduce the possibility of the switching shaft 120 shaking and rotating.

[0050] When the rotational force of the shifting dial 130 reaches the second preset requirement, the rolling element 813 rolls relative to the shifting dial 130 to separate the positioning portion from the limiting portion corresponding to the current shifting position. That is, at this time, there is no limiting effect between the positioning portion of the rolling element 813 and the limiting portion corresponding to the current shifting position, so that the shifting dial 1300 can rotate synchronously with the switching shaft 120 to achieve the shifting operation of the switching mechanism 100. It can be understood that at this time, the rolling element 813 will also roll with the shifting dial 130.

[0051] Furthermore, one of the limiting portion and the positioning portion is a limiting concave surface 131, and the other is a limiting convex surface. Therefore, through the cooperation between the limiting concave surface 131 and the limiting convex surface, a good limiting effect can be achieved to ensure that the shift dial 130 can reliably and stably maintain the current shift gear position.

[0052] Specifically, the limiting portion may be a limiting concave surface 131, the positioning portion may be a limiting convex surface, and the limiting convex surface may be directly disposed on the circumferential side surface of the rolling element 81, or the positioning portion may be a limiting concave surface, the limiting portion may be a limiting convex surface, and the limiting concave surface may be directly disposed on the circumferential side surface of the rolling element 81. It is understandable that when the positioning portion is a limiting convex surface, the positioning portion may be a part of the circumferential side surface of the rolling element 81, that is, the positioning portion is formed on the rolling element 81, thereby the original structure of the rolling element 813 may be utilized, the setting of the positioning portion may be simplified, and the manufacturing cost may be reduced.

[0053] like Figure 4 and Figure 5As shown, in some embodiments, the limiting portion includes a limiting concave surface 131 arranged on the circumference of the shifting dial 130, and the limiting concave surface 131 is adapted to the shape of the circumferential surface of the rolling element 813, that is, the positioning portion is the circumferential side surface of the rolling element 813, and the rolling element 813 of the limiting device 810 is always in contact with the shifting dial 130 under the action of the elastic member 812. When the first driving unit drives the switching shaft 120 to rotate so that the switching mechanism 100 is in any shifting position, the corresponding limiting concave surface 131 on the shifting dial 130 is 1 contacts with the circumferential side of the rolling element 813, limits the rotation of the switching shaft 120, so that the switching shaft 120 can be reliably maintained at the current position, and further enables the switching mechanism 100 to be maintained at the current shift position; when the first driving unit drives the switching shaft 120 to rotate so that the rotation force of the shift dial 130 reaches the second preset requirement, the shift dial 130 can offset the limitation of the limiting concave surface 131 and rotate synchronously with the switching shaft 120. At this time, the rolling element 813 will also roll with the shift dial 130. When the switching shaft 120 rotates to the next shift position, the next limiting concave surface 131 will continue to contact with the circumferential side of the rolling element 813, and limit the rotation of the switching shaft 120, so that the switching shaft 120 can be reliably maintained at the current shift position.

[0054] Among them, the second preset requirement for the rotational force of the shift dial 130 can be set according to actual conditions. When the actual rotational force of the shift dial 130 is greater than the second preset requirement, the shift dial 130 can overcome the action force of the limiting concave surface 131 and the positioning part on the rolling element 813, and rotate synchronously with the switching shaft 120.

[0055] like Figure 5As shown, in the above embodiment, the elastic member 812 includes a connecting frame 8121 and a first elastic member 8122, the connecting frame 8121 is used to connect the first elastic member 8122 and the rolling member 813, wherein the rolling member 813 is rotatably connected to the connecting frame 8121 and is located between the shift dial 130 and the connecting frame 8121, a plug rod 8124 is provided on the side of the first elastic member 8122 and the connecting frame 8121 away from the shift dial 130, and a slot 8111 is provided on the side of the mounting seat 811 facing the shift dial 130. That is to say, the shift dial 130, the rolling element 813, the connecting frame 8121 and the mounting seat 811 are arranged in sequence, the insertion rod 8124 of the connecting frame 8121 is inserted into the slot 8111 of the mounting seat 811, and the first elastic member 8122 is accommodated in the slot 8111 and is located between the mounting seat 811 and the insertion rod 8124. Therefore, the first elastic member 8122 applies a force to the insertion rod 8124 away from the mounting seat 811 to make the rolling element 813 abut against the shift dial 130, so that the rolling element 813 and the shift dial 130 are At the same time, the first elastic member 8122 is also configured to retract toward the mounting seat 811 when the force applied to the rolling member 813 reaches a first preset requirement, thereby driving the rolling member 813 to move toward the mounting seat 811, so that the shift dial 130 can overcome the force of the limiting concave surface 131 and the positioning portion on the rolling member 813, and rotate synchronously with the switching shaft 120, and can make the rolling member 813 roll relative to the shift dial 130.

[0056] The rolling element 813 may be a bearing, which is connected to the connecting frame 8121 via a pin, so that the rolling element 813 can rotate relative to the connecting frame 8121. The first elastic element 8122 may be a spring, which is compressed between the insertion rod 8124 and the bottom of the slot 8111 to apply a force to the insertion rod 8124 away from the mounting seat 811 and close to the shift dial 130.

[0057] like Figure 5As shown, in the above embodiment, the connecting frame 8121 includes at least two plug rods 8124, and the connecting frame 8121 is provided with an avoidance opening 8123 and a connection hole. The avoidance opening 8123 is located between the two plug rods 8124, and the connection hole penetrates the side wall of the avoidance opening 8123. In this way, the rolling element 813 is connected to the connecting frame 8121 through the connection hole, so that part of the rolling element 813 is located in the avoidance opening 8123, and the outer edge of part of the rolling element 813 protrudes from the side of the avoidance opening 8123 close to the shifting dial 130. Among them, the slot 8111 corresponds to the plug rod 8124, that is, the number of the slots 8111 is at least two, and the mounting seat 811 is also provided with an avoidance groove 8112, and the avoidance groove 8112 is located between the two slots 8111 for avoiding the rolling element 813. The setting of the avoidance groove 8112 can ensure that when the rotational force of the shift dial 130 reaches the second preset requirement and causes the rolling element 813 to roll relative to the shift dial 130, the rolling element 813 will not interfere with the mounting seat 811, thereby ensuring that the rolling element 813 can roll smoothly, thereby reducing the restriction on the shift dial 130, and further ensuring that the shift dial 130 can rotate smoothly with the switching shaft 120.

[0058] There are two slots 8111, which are distributed on both sides of the rolling element 813 in a direction perpendicular to the rotation axis of the rolling element 813. The two first elastic members 8122 are accommodated in the two slots 8111 to apply force to the two plug rods 8124, so that the rolling element 813 is subjected to the force of the first elastic members 8122 from both sides in the direction perpendicular to the rotation axis, and the rolling element 813 is abutted against the shifting dial 130. Such a configuration can improve the stability and uniformity of the force applied to the rolling element 813, so that the rolling element 813 can reliably and stably contact and adapt with the limiting part on the shifting dial 130 so that the shifting dial 130 can be stably maintained at the current shifting position, or, when the rotation force of the shifting dial 130 reaches the preset requirement, the rolling element 813 can roll stably relative to the shifting dial 130 without being separated from the shifting dial 130.

[0059] like Figure 6 and Figure 7 As shown, in some possible embodiments provided by the present invention, the switching assembly 110 includes: a reversing seat 112, a transmission group 111 and a rotating group 113. The reversing seat 112 is connected to the switching shaft 120 and is coaxially arranged with the switching shaft 120. The transmission group 111 and the rotating group 113 are installed on the reversing seat 112 along the axial direction of the reversing seat 112. Part of the transmission group 111 and part of the rotating group 113 protrude from the circumferential side wall of the reversing seat 112. The transmission group 111 is configured to be in a non-transmission state at the feeding position and the zeroing position, and in a transmission state at the unloading position. The rotating group 113 is configured to extrude the consumables at the feeding position and separate from the consumables at the zeroing position.

[0060] like Figure 1 , Figure 2 As shown, in some possible embodiments provided by the present invention, the consumable material conveying device includes a first shaft 310 and a second shaft 510, and the switching shaft 120 is located between the first shaft 310 and the second shaft 510, and is parallel to the first shaft 310 and the second shaft 510. Among them, the first shaft 310 of the consumable material conveying device is configured to be rotatable, such as the consumable material conveying device can also include a second driving unit 400, the second driving unit 400 is used to connect with the first shaft 310 to drive the first shaft 310 to rotate, specifically, the second driving unit 400 can drive the first shaft 310 to rotate in both directions, such as the second driving unit 400 can drive the first shaft 310 to rotate clockwise, and can also drive the first shaft 310 to rotate counterclockwise. Specifically, the second driving unit 400 can be a motor, and the second driving unit 400 is connected to the first shaft 310 through a transmission unit, and the transmission unit can be a synchronous belt transmission mechanism, or other mechanisms that meet the requirements. When the transmission part is synchronous belt transmission, a second synchronous wheel 330 for connecting with the synchronous belt is provided on the first shaft 310.

[0061] Among them, Figure 1 and Figure 2 As shown, the three-dimensional molding device also includes a consumables carrying device, which includes a tray 10, the tray 10 is used to accommodate consumables, and the second shaft 510 is used to support the tray 10. It can be understood that the consumables conveying device can also include a third shaft 610, and the second shaft 510 and the third shaft 610 jointly support the tray 10, so that the tray 10 can be rotatably carried on the second shaft 510 and the third shaft 610. Specifically, the rotation axes of the second shaft 510, the third shaft 610, and the tray 10 are parallel to each other, and the two rims of the tray 10 are in contact with the circumferential surface of the second shaft 510 and the circumferential surface of the third shaft 610, so that the tray 10 can rotate, driving the consumables on the tray 10 to fall off from the tray 10 and wrap around the tray 10.

[0062] Among them, the switching shaft 120 of the switching mechanism 100 is arranged between the first shaft 310 and the second shaft 510, and the switching shaft 120 of the switching mechanism 100 is set parallel to the first shaft 310 and the second shaft 510, and the switching component 110 on the switching shaft 120 is close to the first shaft 310. The side of the consumable channel is formed or set, that is, the consumable is located between the switching component 110 and the first shaft 310.

[0063] When the switching component 110 is in the feeding position, the transmission group 111 is in a non-transmission state, and the rotating group 113 is configured to extrude the consumables, that is, when the switching component 110 is in the feeding position, the transmission group 111 is not connected to the first shaft 310 and the second shaft 510, and the first shaft 310 and the second shaft 510 are powered separately. Since the consumables are located between the switching component 110 and the first shaft 310, the rotating group 113 and the first shaft 310 work together to squeeze the consumables between the switching component 110 and the first shaft 310. Therefore, when the first shaft 310 rotates in the feeding direction, the consumables will rotate synchronously with the first shaft 310 under the extrusion force of the rotating group 113 of the switching component 110, and by pulling the consumables, the material tray 10 actively rotates under the action of the consumables to release the consumables to achieve feeding, that is, the switching component 110 is in the feeding state. This feeding method has a simple structure and is easy to implement. In some embodiments, under the premise that the first shaft 310 and the second shaft 510 are powered separately, the transmission group 111 of the switching component 110 can be separated from the first shaft 310, and the transmission group 111 and the second shaft 510 still maintain contact. In the above process, the consumables are fed under the joint extrusion of the first shaft 310 and the rotating wheel 1132. Although the transmission group 111 of the switching component 110 and the second shaft 510 still maintain contact, the second shaft 510 will not receive the power of the first shaft 310 through the transmission group 111. The switching component 110 and the second shaft 510 maintain contact only to prepare for the subsequent material return.

[0064] When the switching component 110 is in the material unloading position, the transmission group 111 of the switching component 110 is configured to be in a transmission state, that is, the transmission group 111 is powered to connect the first shaft 310 and the second shaft 510, that is, the rotation of the first shaft 310 through the transmission group 111 of the switching component 110 will drive the second shaft 510 to rotate. Therefore, when the first shaft 310 rotates in the material unloading direction, the second shaft 510 will be driven to rotate through the transmission group 111 of the switching component 110, and the rotation of the second shaft 510 will drive the material tray 10 to rotate. The rotation of the material tray 10 has a pulling force on the consumables located between the switching component 110 and the first shaft 310. Thereby, the consumables can be unloaded and stored on the material tray 10 to realize material unloading and collection, that is, the switching component 110 is in the material unloading state. In some embodiments, in addition to the transmission group 111 connecting the power of the first shaft 310 and the second shaft 510, the rotation group 113 of the switching assembly 110 is also used to extrude the consumable together with the first shaft 310 to increase the pulling force of the consumable to return, thereby improving the efficiency of consumable return.

[0065] When the switching component is in the zero position, the transmission group 111 is in a non-transmission state, and the rotating group 113 is configured to be separated from the consumables, that is, when the switching component 110 is in the zero position, the transmission group 111 is not connected to the first shaft 310 and the second shaft 510, and the first shaft 310 and the second shaft 510 are power-separated. At the same time, since the rotating group 113 is separated from the consumables, the switching component 110 will not perform any operation on the consumables.

[0066] The first shaft 310 rotates in the feeding direction, which can be understood as the first shaft 310 rotating from the entrance to the exit of the consumable channel. Figure 3 As shown, the counterclockwise rotation of the first shaft 310 in the P direction can be the feeding direction. The material withdrawal direction of the first shaft 310 is opposite to the feeding direction of the first shaft 310. The material withdrawal direction of the first shaft 310 can be understood as the direction in which the first shaft 310 rotates from the outlet to the inlet of the consumable channel, as shown in FIG. Figure 3 As shown, the first shaft 310 rotates in the clockwise direction Q.

[0067] Therefore, by switching the component 110 with one structure, the switching shaft 120 is respectively in the feeding position and the withdrawing position, so that the feeding and withdrawing operations of the consumables can be realized, which has a simple structure and is easy to operate.

[0068] like Figure 6 and Figure 7 As shown, in the above embodiment, the transmission group 111 includes a first gear, and a second gear 1112 and a third gear 1113 distributed on both sides of the first gear and meshing with the first gear. The first gear is coaxially arranged with the reversing seat 112 and can rotate relative to the reversing seat 112. The second gear 1112 and the third gear 1113 are staggered along the axial direction of the reversing seat 112 and partially protrude from the circumferential side wall of the reversing seat 112. The rotating group 113 is respectively arranged corresponding to the second gear 1112 and the third gear 1113 in the axial direction of the reversing seat 112.

[0069] Among them, Figure 1As shown, a first sub-gear 320 may be provided on the first shaft 310, and a second sub-gear 511 may be provided on the second shaft 510. When the switching assembly 110 is in the feeding position, the second gear 1112 is configured as the power input end of the transmission group 111, the second gear 1112 is configured to be power-disconnected from the first shaft 310, the third gear 1113 is configured as the power output end of the transmission group 111, and the third gear 1113 is configured to be power-connected to the second shaft 510. In some embodiments, the above connection and separation states can be achieved by whether the gears are meshed, that is, the second gear 1112 is not meshed with the first sub-gear 320 on the first shaft 310, such as the second gear 1112 and the first sub-gear 320 are staggered along the axial direction of the gear seat, and the third gear 1113 is meshed with the second sub-gear 511 on the second shaft 510, thereby making the first shaft 310 and the second shaft 510 power-disconnected, that is, the rotation of the first shaft 310 does not drive the second shaft 510 to rotate. At this time, the rotating group 113 relative to the second gear 1112 is configured to squeeze the consumables between the switching assembly 110 and the first shaft 310. Specifically, in this position, the rotating group 113 relative to the second gear 1112 can be relative to the first sub-gear 320 on the first shaft 310, so that the rotating group 113 relative to the second gear 1112 can squeeze the consumables on the first sub-gear 320. In this way, when the first shaft 310 rotates in the direction of feeding, the consumables will rotate synchronously with the first shaft 310 under the action of the extrusion force of the rotating group 113 and the first sub-gear 320, and the consumables will be pulled to drive the material tray 10 to rotate to achieve feeding. At the same time, since the consumables are squeezed between the rotating group 113 and the first sub-gear 320, the consumables are reduced from slipping and losing steps during the feeding process, and the stability of the consumable feeding is further improved, which is conducive to improving the printing quality and ensuring good printing quality. In some other embodiments, the above-mentioned connection and separation states can also be achieved by some methods such as synchronous belts.

[0070] Among them, as shown in 1, when the switching component 110 is in the material unloading position, the third gear 1113 is configured as the power input end of the transmission group 111, the third gear 1113 is configured to be power-connected to the first shaft 310, the second gear 1112 is configured as the power output end of the transmission group 111, the second gear 1112 is configured to be power-connected to the second shaft 510, and the rotating group 113 opposite to the third gear 1113 is configured to be used for extruding the consumables located between the switching component 110 and the first shaft 310. That is to say, when the switching component 110 is in the material unloading state, the third gear 1113 meshes with the first sub-gear 320 on the first shaft 310, and the second gear 1112 meshes with the second sub-gear 511 on the second shaft 510, so that the first shaft 310 and the second shaft 510 are poweredly connected through the first sub-gear 320, the transmission group 111, and the second sub-gear 511. In this way, the rotation of the first shaft 310 in the material unloading direction will drive the second shaft 510 to rotate, and the rotation of the second shaft 510 will drive the material tray 10 to rotate. The rotation of the material tray 10 will have a certain pulling force on the consumables connected to the print head, so that the consumables between the switching component 110 and the first shaft 310 are unloaded and stored and wound on the material tray 10, thereby realizing the material unloading operation. At the same time, during the process of withdrawing the consumables, the consumables are squeezed between the rotating group 113 and the first shaft 310 by the rotating group 113 corresponding to the third gear 1113, so that the withdrawing speed of the consumables matches the rotational speed of the first shaft 310 and the rotational speed of the second shaft 510, thereby reducing the slipping and step loss of the consumables during the withdrawing process, so that the withdrawn consumables can be smoothly and reliably collected and wound on the material tray 10, avoiding the problem that the withdrawn consumables are not matched with the rotational speed of the material tray 10, causing the withdrawn consumables to accumulate under the material tray 10 and not be collected in time, which is conducive to ensuring good material withdrawal efficiency and collection effect.

[0071] When the switching component 110 is in the zero position, the transmission group 111 is not connected to the first shaft 310 and the second shaft 510, that is, the second gear 1112 is separated from the first shaft 310 and the second shaft 510, the third gear 1113 is separated from the first shaft 310 and the second shaft 510, and the rotating group 113 is separated from the consumables. As a result, the switching component 110 will not operate the consumables, that is, the switching mechanism is in the zero position.

[0072] Among them, Figure 6 and Figure 7 As shown, the second gear 1112 and the third gear 1113 are arranged at intervals along the circumference of the reversing seat 112, which can ensure that the second gear 1112 of the switching component 110 is poweredly separated from the first shaft 310 at the feeding position, and the third gear 1113 of the switching component 110 at the withdrawing position can be smoothly connected to the first shaft 310, so as to ensure that the same switching component 110 can switch between the feeding state and the withdrawing state at different positions, and the structure is simple.

[0073] Furthermore, the second gear 1112 and the third gear 1113 may also be distributed on both sides of the first gear at a preset angle, and the preset angle may be 30°, 60°, 120°, 180°, or other angles. For example, the second gear 1112 and the third gear 1113 are symmetrically arranged on both sides of the first gear, that is, the second gear 1112 and the third gear 1113 are distributed at an interval of 180°, that is, the rotation angle between the switching component 110 at the feeding position and the switching component 110 at the unloading position is 180°. In this way, when the rotation angle of the switching component 110 is 0°, the switching component 110 is in the feeding position, and when the switching component 110 rotates 180°, the switching component 110 can be in the unloading position. This arrangement facilitates the switching component 110 to quickly and accurately realize the switching between the first shift position and the second shift position.

[0074] like Figure 6 , Figure 7 and Figure 8 As shown, in some possible embodiments provided by the utility model, a first installation cavity is provided on the side of the reversing seat 112 facing the transmission group 111, and the switching assembly 110 also includes a first protective cover 115, which is connected to the reversing seat 112 to cover the first installation cavity, and the transmission group 111 is accommodated in the first installation cavity. The cavity wall of the first installation cavity is provided with a first avoidance opening 1122 for avoiding the second gear 1112 and the third gear 1113, thereby allowing the second gear 1112 and the third gear 1113 extending outside the first avoidance opening 1122 to be smoothly and selectively connected to the first shaft 310 and the second shaft 510 for power.

[0075] Among them, the first protective cover 115 is also used to limit the movement of the transmission group 111 along the axial direction of the reversing seat 112, so that the transmission group 111 can be reliably confined between the first protective cover 115 and the reversing seat 112, reducing the possibility of the transmission group 111 being offset in the axial direction of the reversing seat 112, thereby ensuring that the transmission group 111 can be accurately and selectively connected to the first shaft 310 and the second shaft 510 in terms of power, so as to improve the accuracy and sensitivity of the switching of the switching component 110 between the first shift position and the second shift position, so as to improve the accuracy of the switching of the feeding and withdrawing material states.

[0076] like Figure 6 , Figure 7 and Figure 8As shown, in some possible embodiments provided by the utility model, a second installation cavity is provided on the side of the reversing seat 112 away from the transmission group 111, and a second avoidance opening 1124 is opened on the cavity wall of the second installation cavity. The rotating group 113 is installed in the second installation cavity, and the switching component 110 also includes a second elastic member 114 located in the second installation cavity, and the second elastic member 114 connects the reversing seat 112 and the rotating group 113. The second elastic member 114 is used to apply a force to the rotating group 113 to move in a direction close to the second avoidance opening 1124, so that the rotating group 113 is stuck in the second avoidance opening 1124 and part of the rotating group 113 extends to the outside of the second avoidance opening 1124. As a result, the rotating group 113 extending to the outside of the second avoidance opening 1124 can selectively squeeze the first shaft 310, and then squeeze the consumables in the feeding state or selectively squeeze the consumables in the returning state, so as to improve the smoothness of the consumable feeding and improve the printing quality, or to improve the smoothness of the consumable returning to ensure a good material receiving effect.

[0077] Furthermore, since the rotating group 113 is clamped in the second avoidance opening 1124 , the rotating group 113 will not escape from the second installation cavity, so as to ensure that the rotating group 113 can reliably and smoothly squeeze the first shaft 310 .

[0078] In the above embodiment, if Figure 6 and Figure 7 As shown, the rotating group 113 includes a rotating seat and a first bearing, the first bearing is rotatably connected to the rotating seat, the rotating seat is movably inserted in the reversing seat 112, and the second elastic member is connected to the rotating seat to apply a force to the rotating seat to move around the reversing seat 112 in a direction close to the second avoidance opening 1124. Therefore, under the action of the second elastic member, the end of the rotating seat away from the reversing seat 112 can move around the reversing seat 112 in a direction close to the second avoidance opening 1124 to be stuck at the second avoidance opening 1124, and at the same time, part of the rotating group 113 can extend to the outside of the second avoidance opening 1124.

[0079] The second elastic member can be a spring, and the spring and the second avoidance opening 1124 are located on both sides of the rotating seat. One end of the spring is connected to the cavity wall of the second installation cavity of the reversing seat 112, and the other end is connected or low-connected to the rotating seat.

[0080] Among them, the first bearing is a U-shaped bearing. When the U-shaped bearing extrude the consumables, it can guide the consumables inside the U shape, thereby playing a good guiding and limiting role for the consumables, reducing the possibility of the consumables running off the first bearing, and further improving the feeding efficiency and the material return efficiency.

[0081] In some possible embodiments, the number of switching components 110 is one or more, thereby meeting the material feeding and withdrawing needs of different numbers of material trays 10 and expanding the scope of use of the product.

[0082] Furthermore, the switching mechanism 100 includes a plurality of switching components 110, and the number of the switching components 110 can be the same as the number of the material trays 10, thereby enabling the feeding and returning operations of the consumables corresponding to the material trays 10 to meet the printing requirements of various materials of the three-dimensional molding equipment, as well as the color printing requirements.

[0083] Among them, the transmission components 111 on the multiple switching components 110 have different projection positions in the axial direction of the switching shaft 120. When the switching mechanism 100 is in the working gear position, one of the switching components 110 is in the feeding position or the withdrawing position. When the switching mechanism 100 is in the non-working gear position, any switching component 110 is in the zeroing position. In other words, the number of working gears of the switching mechanism 100 can be multiple, and can include the same number of feeding gears and withdrawing gears to correspond to the feeding position and withdrawing position of each switching component 110 respectively. The number of non-working gears of the switching mechanism 100 can be at least one, wherein a non-working gear can be a state in which any switching component 110 is in the zeroing position, corresponding to the zero point position of the switching mechanism 100.

[0084] Specifically, Figure 1 and Figure 2 As shown, the material changing mechanism 100 includes four switching components 110 and the three-dimensional forming equipment includes four material trays 10 for explanation.

[0085] The transmission group 111 of the switching component 110 includes a structure of a first gear, a second gear 1112 and a third gear 1113, and the first gear and the second gear 1112 are distributed at an interval of 180° for illustration. The shift positions of the four switching components 110 are spaced apart along the circumference of the switching shaft 120, that is, the four switching components 110 are installed on the circumference of the switching shaft 120 at intervals of preset angles, so that the switching shaft 120 includes at least nine gear positions along the circumference, and the nine gears are arranged in sequence from gear 1 to gear 9. Among them, gear 1 is a non-working gear, gears 2 to 9 are working gears, and gear 1 belongs to a zeroing state. In this gear state, all switching components 110 are disconnected from the first shaft 310, that is, the switching shaft 120 and the first shaft 310 are powered and separated, and all rotating groups 113 are also separated from the first shaft 310. At this time, the consumables can be connected to the print head of the stereolithography device through the consumables channel between the first shaft 310 and the switching component 110. Gear 2 and gear 6 correspond to the feed position and return position of the first switching component 110, and control the feed and return of the consumable channel corresponding to the first material tray 10; gear 3 and gear 7 correspond to the feed position and return position of the second switching component 110, and control the feed and return of the consumable channel corresponding to the second material tray 10; gear 4 and gear 8 correspond to the feed position and return position of the third switching component 110, and control the feed and return of the consumable channel corresponding to the third material tray 10; gear 5 and gear 9 correspond to the feed position and return position of the fourth switching component 110, and control the feed and return of the consumable channel corresponding to the fourth material tray 10, wherein each gear has only one state. The above arrangement makes the shift dial 130 have a shape as shown in the figure, in which the limiting concave surfaces 131 are evenly distributed in the circumferential direction of the shift dial 130, and there are nine limiting concave surfaces 131, of which eight limiting concave surfaces 131 correspond to the eight working gears, and one limiting concave surface 131 corresponds to the non-working gear, that is, one limiting concave surface 131 corresponds to the zero point position of the switching shaft 120.

[0086] It can be understood that in some possible embodiments, the switching shaft 120 in the above embodiment can include a total of ten gear positions along the circumferential direction, among which gear 10 is a non-working gear. At this time, the switching assembly 110 is not in contact with the first shaft 310 and the second shaft 510, and gear 10 and gear 1 are relatively distributed on both sides of the switching shaft 120. In this way, the total number of gears is designed to be an even number for easy processing.

[0087] like Figures 1 to 7 As shown, the second aspect of the present invention provides a consumable material conveying device, comprising: a switching mechanism 100 of any embodiment in the first aspect. Since the consumable material conveying device comprises the switching mechanism 100 of any embodiment in the first aspect, it has all the beneficial technical effects of the switching mechanism 100, which will not be described in detail here.

[0088] like Figure 1 , Figure 2 As shown, in some possible embodiments provided by the present invention, the consumable material conveying device also includes: a bracket 700, a first shaft 310, a second shaft 510 and a second driving unit 400, the switching shaft 120, the first shaft 310, and the second shaft 510 are rotatably connected to the bracket 700, and the second driving unit 400 is connected to the first shaft 310 to drive the first shaft 310 to rotate. It can be understood that the three-dimensional molding device includes a consumable material carrying device, the consumable material carrying device includes a material tray 10 for carrying consumables, the second shaft 510 is used to carry the consumable material carrying device, and the rim of the material tray 10 is in contact with the circumferential surface of the second shaft 510; wherein, the position switch 820 is installed on the bracket 700.

[0089] Among them, the bracket 700 can be fixed on the main body of the three-dimensional molding equipment, or an additional supporting structure is used to support the bracket 700, or the bracket 700 can be directly placed on the operating table. The consumable conveying device also includes a plurality of bearings, and the first shaft 310, the second shaft 510, the third shaft 610, and the switching shaft 120 of the material changing mechanism are rotatably connected to the bracket 700 through at least one bearing. The number and structure of the bearings can be reasonably set according to the contact position between the bracket 700 and each component, such as a bearing can be set at both ends of the switching shaft 120, and a bearing can be set at both ends of the first shaft 310. Specifically, the bracket 700 can be open, supporting each component only at the bottom, or, as shown in the figure, the bracket 700 can be closed, the bracket 700 includes an inner cavity, each component is located in the inner cavity, and a through hole is set on the bracket 700 for the consumables to enter and exit.

[0090] like Figures 1 to 7 As shown, the consumable material conveying device can be a material box, and the material box includes a main shell 20, and the switching mechanism 100 is connected to the main shell 20. Among them, the main shell 20 can be an open shell, that is, the material tray 10 and the switching mechanism 100 are exposed, that is, the main shell 20 provides bottom support. Alternatively, in one embodiment, the main shell 20 includes a accommodating space, and the material tray 10, the switching mechanism 100, the first shaft 310, the second shaft 510, the bracket 700 and the second driving part 400 are located in the accommodating space, so that the position between the material tray 10 and the second shaft 510 is more stable, and the material tray 10 and the switching mechanism 100 are placed in the main shell 20 as a whole, and the setting position is diversified and can be arranged according to needs.

[0091] The main housing 20 may further include a bottom housing and an upper housing, wherein the upper housing is used to cooperate with the bottom housing to enclose a storage space, and the consumables conveying device and the material tray 10 are both connected to the bottom housing. The upper housing and the bottom housing may be rotatably connected. In the embodiment in which the consumables conveying device includes a bracket 700, the bracket 700 may be connected to the bottom housing, such as being integrally formed. The upper housing may be opened and closed relative to the bottom housing to carry out the placement and take-out of the material tray 10. It is understood that a consumables outlet is provided on the bottom housing for leading the consumables to the print head.

[0092] The third aspect of the present invention provides a three-dimensional molding device, comprising: the switching mechanism 100 of any one of the first aspect; or the consumable material conveying device of any one of the second aspect. Since the three-dimensional molding device comprises any one of the switching mechanism 100 or consumable material conveying device or material box, it has the advantages of the switching mechanism 100 and consumable material conveying device, which will not be described in detail here.

[0093] Furthermore, the three-dimensional molding device also includes a main support frame, a power structure, a print head and a printing platform, the print head and the printing platform are both connected to the power structure and slidably connected to the main support frame, and the print head and the printing platform are relatively moved and printed under the drive of the power structure. The consumables conveying device can be connected to the main support frame, and the latter is fixed by an additional fixing member.

[0094] Specifically, Figures 1 to 7 As shown, the utility model also provides the following implementation modes:

[0095] Label 1, a switching mechanism 100, the switching mechanism 100 includes multiple shift positions, the shift positions include working gears and non-working gears; the switching mechanism also includes an action member 150 and a position switch 820, the action member 150 is used to interact with the position switch 820 when the switching mechanism 100 is in the non-working gear position, so that the position switch 820 sends a zeroing signal.

[0096] Label 2, according to the switching mechanism 100 of label 1, it also includes: a switching shaft 120 and a switching component 110, the switching component 110 is installed on the switching shaft 120, the switching component 110 includes a feeding position, a returning position and a zeroing position, when the switching mechanism 100 is in any working gear position, the switching component 110 is in the feeding position or the returning position, when the switching mechanism 100 is in a non-working gear position, the switching component 110 is in the zeroing position; wherein any shifting position corresponds to a different position on the axial projection of the switching shaft 120.

[0097] Label 3, according to the switching mechanism 100 of label 2, further comprising: a shift dial 130, the shift dial 130 is coaxially connected to the switching shaft 120, and one of the actuator 150 and the position switch 820 is arranged on the shift dial 130.

[0098] Reference numeral 4 : According to the switching mechanism 100 of reference numeral 3 , the actuator 150 is disposed on the shifting dial 130 and protrudes from the circumferential side wall of the shifting dial 130 .

[0099] Label 5, according to the switching mechanism 100 of label 4, a first limiting surface 121 is provided on the circumferential side surface of the end of the switching shaft 120; a first mounting hole adapted to the switching shaft 120 is opened at the center of the shift dial 130, and a second limiting surface 132 is provided on the side wall of the first mounting hole, and the first limiting surface 121 and the second limiting surface 132 cooperate to limit the rotation of the shift dial 130 relative to the switching shaft 120.

[0100] Label 6, according to the switching mechanism 100 of label 3, it also includes: a limit device 810, a plurality of limit parts corresponding to the shift positions are opened on the circumference of the shift dial 130, and the limit parts interact with the limit device 810 to keep the switching shaft 120 at the current shift position.

[0101] 7. According to the switching mechanism 100 of 6, the limiting device 810 includes: a mounting seat 811 and an elastic member 812, wherein the first end of the elastic member 812 is connected to the mounting seat 811, and the second end of the elastic member 812 abuts against the shift dial 130, and the elastic member 812 is configured to provide a force to the second end to abut against the shift dial 130, and retract toward the first end when the force applied to the second end reaches a first preset requirement.

[0102] Label 8, according to the switching mechanism 100 of label 7, the second end is provided with a positioning portion cooperating with the limiting portion, and the positioning portion is in contact with the limiting portion to enable the shift dial 130 to maintain the current shift position; wherein, when the force applied to the second end by the shift dial 130 reaches a first preset requirement, the positioning portion and the limiting portion corresponding to the current shift position are switched from a contact state to a separation state.

[0103] 9. According to the switching mechanism 100 of 7, the limiting device 810 also includes a rolling member 813, which is rotatably connected to the second end, and at least part of the circumferential side of the rolling member 813 abuts against the limiting portion; wherein, the circumferential side of the rolling member 813 is provided with or formed with a positioning portion that cooperates with the limiting portion, and the positioning portion contacts the limiting portion so that the shift dial 130 maintains the current shift position, and when the rotational force of the shift dial 130 reaches the second preset requirement, the rolling member 813 rolls relative to the shift dial 130 to separate the positioning portion from the limiting portion corresponding to the current shift position.

[0104] Reference numeral 10 , according to the switching mechanism 100 of reference numerals 8 and 9 , one of the limiting portion and the positioning portion is a limiting concave surface 131 , and the other is a limiting convex surface.

[0105] 11. According to the switching mechanism 100 of number 9, the elastic member 812 includes a connecting frame 8121 and a first elastic member 8122, the rolling member 813 is rotatably connected to the connecting frame 8121 and is located between the shift dial 130 and the connecting frame 8121, a plug rod 8124 is provided on the side of the connecting frame 8121 away from the shift dial 130, the mounting seat 811 is provided with a slot 8111, the plug rod 8124 is inserted in the slot 8111, the first elastic member 8122 is accommodated in the slot 8111 and is located between the mounting seat 811 and the plug rod 8124, the first elastic member 8122 is configured to apply a force to the plug rod 8124 away from the mounting seat 811 to make the rolling member 813 abut against the shift dial 130, and drive the plug rod 8124 to retract toward the mounting seat 811 when the force applied to the rolling member 813 reaches a first preset requirement.

[0106] Label 12, according to the switching mechanism 100 of label 11, the connecting frame 8121 includes at least two plug rods 8124, the connecting frame 8121 is provided with an avoidance opening 8123 and a connecting hole, the avoidance opening 8123 is located between the two plug rods 8124, the connecting hole passes through the side wall of the avoidance opening 8123, the rolling element 813 is connected to the connecting frame 8121 through the connecting hole, and the outer edge of part of the rolling element 813 protrudes from the side of the avoidance opening 8123 close to the shift dial 130; the slot 8111 corresponds to the plug rod 8124, and the mounting seat 811 is also provided with an avoidance groove 8112, and the avoidance groove 8112 is located between the two slots 8111 for avoiding the rolling element 813.

[0107] Label 13, according to the switching mechanism 100 of label 2, the switching assembly 110 includes a reversing seat 112, a transmission group 111 and a rotating group 113, the reversing seat 112 is connected to the switching shaft 120 and is coaxially arranged with the switching shaft 120, the transmission group 111 and the rotating group 113 are installed on the reversing seat 112 along the axial direction of the reversing seat 112, and at least part of the transmission group 111 and part of the rotating group 113 protrude from the circumferential side wall of the reversing seat 112; wherein the transmission group 111 is configured to be in a non-transmission state at the feeding position and the zeroing position, and to be in a transmission state at the withdrawing position, and the rotating group 113 is configured to extrude the consumable at the feeding position and to separate from the consumable at the zeroing position.

[0108] Label 14, according to the switching mechanism 100 of label 13, the number of switching components 110 is one or more, and the transmission components 111 on the multiple switching components 110 have different projection positions on the axial direction of the switching shaft 120. When the switching mechanism 100 is in the working gear position, one of the switching components 110 is in the feeding position or the unloading position. When the switching mechanism 100 is in the non-working gear position, any switching component 110 is in the zero position.

[0109] The utility model also provides a complete embodiment of the consumable material conveying device as follows:

[0110] Label 15. A consumable material conveying device, comprising: a switching mechanism 100 as described in any one of labels 1 to 10.

[0111] Label 16, the consumable material conveying device according to label 15 also includes: a bracket 700, a first shaft 310, a second shaft 510 and a second driving unit 400, the switching shaft 120, the first shaft 310, and the second shaft 510 are rotatably connected to the bracket 700, the second driving unit 400 is connected to the first shaft 310 to drive the first shaft 310 to rotate, and the second shaft 510 is configured to carry a material tray; wherein, the transmission group 111 of the switching mechanism 100 is configured to be selectively connected to the first shaft 310, and the transmission group 111 is configured to be connected to the second shaft 510.

[0112] The utility model also provides the following complete embodiment of three-dimensional molding:

[0113] Label 17, a three-dimensional molding device, comprising: a switching mechanism 100 as any one of labels 1 to 14; or a consumable material conveying device as label 15 or 16.

[0114] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the terms "upper" and "lower" indicate positions or positional relationships based on the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A switching mechanism, characterized in that: The switching mechanism includes a plurality of shift positions, and the shift positions include a working gear position and a non-working gear position; The switching mechanism further comprises an action member and a position switch, wherein the action member is used to interact with the position switch when the switching mechanism is in the non-working gear position, so that the position switch sends a zeroing signal; The switching mechanism also includes a switching shaft and a switching component, the switching component is installed on the switching shaft, the switching component includes a feed position, a return position and a zero position, when the switching mechanism is in any of the working gear positions, the switching component is at the feed position or the return position, when the switching mechanism is in the non-working gear, the switching component is at the zero position, and any of the shifting positions corresponds to a different position on the axial projection of the switching shaft.

2. The switching mechanism according to claim 1, characterized in that: Also includes: A shift dial is coaxially connected to the switching shaft, and one of the actuator and the position switch is arranged on the shift dial.

3. The switching mechanism according to claim 2, characterized in that: The action member is arranged on the shift dial and protrudes from the circumferential side wall of the shift dial.

4. The switching mechanism according to claim 3, characterized in that: A first limiting surface is provided on the circumferential side surface of the end portion of the switching shaft; A first mounting hole matched with the switching shaft is opened at the center of the shift dial, and a second limiting surface is provided on the side wall of the first mounting hole. The first limiting surface and the second limiting surface cooperate to limit the rotation of the shift dial relative to the switching shaft.

5. The switching mechanism according to claim 2, characterized in that: Also includes: A limiting device, wherein a plurality of limiting parts corresponding to the shifting positions are provided on the circumference of the shifting dial, and the limiting parts interact with the limiting device to enable the switching shaft to maintain the current shifting position.

6. The switching mechanism according to claim 5, characterized in that: The limiting device includes: a mounting seat and an elastic member, wherein the first end of the elastic member is connected to the mounting seat, and the second end of the elastic member abuts against the shift dial. The elastic member is configured to provide a force to the second end to abut against the shift dial, and to retract in a direction close to the first end when the force applied to the second end reaches a first preset requirement.

7. The switching mechanism according to claim 6, characterized in that: The second end is provided with a positioning portion cooperating with the limiting portion, and the positioning portion contacts the limiting portion to enable the shift dial to maintain the current shift position; When the force exerted by the shift dial on the second end reaches the first preset requirement, the positioning portion and the limiting portion corresponding to the current shift position are switched from a contact state to a separation state.

8. The switching mechanism according to claim 6, characterized in that: The limiting device further comprises a rolling member, the rolling member is rotatably connected to the second end, and at least part of the circumferential side surface of the rolling member abuts against the limiting portion; Wherein, a positioning portion cooperating with the limiting portion is provided or formed on the circumferential side surface of the rolling element, and the positioning portion contacts the limiting portion so that the shift dial maintains the current shift position. When the rotational force of the shift dial reaches a second preset requirement, the rolling element rolls relative to the shift dial to separate the positioning portion from the limiting portion corresponding to the current shift position.

9. The switching mechanism according to claim 7 or 8, characterized in that: One of the limiting portion and the positioning portion is a limiting concave surface, and the other is a limiting convex surface.

10. The switching mechanism according to claim 8, characterized in that: The elastic member includes a connecting frame and a first elastic member, the rolling member is rotatably connected to the connecting frame and is located between the shift dial and the connecting frame, an insertion rod is provided on a side of the connecting frame away from the shift dial, the mounting seat is provided with a slot, the insertion rod is inserted in the slot, the first elastic member is accommodated in the slot and is located between the mounting seat and the insertion rod, the first elastic member is configured to apply a force to the insertion rod away from the mounting seat to make the rolling member abut against the shift dial, and drive the insertion rod to retract toward the mounting seat when the force on the rolling member reaches the first preset requirement.

11. The switching mechanism according to claim 10, characterized in that: The connecting frame comprises at least two of the insert rods, the connecting frame is provided with an avoidance opening and a connection hole, the avoidance opening is located between the two insert rods, the connection hole penetrates the side wall of the avoidance opening, the rolling element is connected to the connecting frame through the connection hole, and the outer edge of part of the rolling element protrudes from the side of the avoidance opening close to the shifting dial; The slot corresponds to the insertion rod, and the mounting seat is further provided with an avoidance groove, which is located between the two slots and is used to avoid the rolling element.

12. The switching mechanism according to claim 1, characterized in that: The switching assembly comprises a reversing seat, a transmission group and a rotating group, wherein the reversing seat is connected to the switching shaft and is coaxially arranged with the switching shaft, the transmission group and the rotating group are installed on the reversing seat along the axial direction of the reversing seat, and at least part of the transmission group and part of the rotating group protrude from the circumferential side wall of the reversing seat; Among them, the transmission group is configured to be in a non-transmission state at the feeding position and the zeroing position, and to be in a transmission state at the withdrawing position, and the rotating group is configured to extrude the consumable at the feeding position and to separate from the consumable at the zeroing position.

13. The switching mechanism according to claim 12, characterized in that: The number of the switching components is one or more, and the projection positions of the transmission components on the multiple switching components on the axial direction of the switching shaft are different. When the switching mechanism is in the working gear position, one of the switching components is in the feeding position or the withdrawing position. When the switching mechanism is in the non-working gear position, any one of the switching components is in the zeroing position.

14. A consumable material conveying device, characterized in that: include: A switching mechanism as claimed in any one of claims 1 to 13.

15. The consumable material conveying device according to claim 14, characterized in that: Also includes: A bracket, a first shaft, a second shaft and a second driving part, wherein the switching shaft, the first shaft and the second shaft are rotatably connected to the bracket, the second driving part is connected to the first shaft to drive the first shaft to rotate, and the second shaft is configured to carry a material tray; Wherein, the transmission group of the switching mechanism is configured to be selectively connected to the first shaft, and the transmission group is configured to be connected to the second shaft.

16. A three-dimensional forming device, characterized in that: include: The switching mechanism according to any one of claims 1 to 13; or A consumable material conveying device as described in claim 14 or 15.

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