Motion isolation mechanism and three-dimensional printer

Abstract

The utility model discloses a motion isolation mechanism and a three-dimensional printer. The motion isolation mechanism comprises a moving part and a moving part, the moving part is connected to the isolation part; the first end of the isolation piece is wound on the first winding and unwinding piece, and the isolation piece located between the first winding and unwinding piece and the moving piece forms a first subsection; the second end of the isolation piece is wound on the second winding and unwinding piece, and the isolation piece located between the second winding and unwinding piece and the moving piece forms a second subsection; and the driving unit is used for driving the moving part and the isolation part to move in the same direction along a preset path and enabling the isolation part located between the first retracting and releasing part and the second retracting and releasing part to be kept in a tensioned state. Compared with the prior art, the motion isolation mechanism provided by the utility model can ensure that the tension force of the isolation piece meets the requirement in the working process, and the dustproof and heat insulation effects of the motion isolation mechanism are prevented from becoming poor, so that the forming precision of the three-dimensional printer is ensured, and the stable operation of the three-dimensional printer is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of three-dimensional printing, in particular to a motion isolation mechanism and a three-dimensional printer. Background Art

[0002] The processing process of the 3D printer includes: the powder feeding module delivers a certain amount of powder to the work surface, the powder spreading module spreads a layer of powder material on the support platform or the upper surface of the formed part on the support platform, and then the selected part of the powder layer is solidified by the printing module and / or the energy module to form a cross-section of the three-dimensional object, wherein the movement of one or more of the powder spreading module, the printing module and the energy module is realized by a motion mechanism.

[0003] However, the motion mechanism of the 3D printer always has a connecting channel that allows the spaces on both sides to exchange media, and during the molding process, the 3D printer usually generates high temperature and atomized dust. The existing technology avoids the medium exchange between the two sides by sealing the connecting channel to isolate the two sides of the space. For example, the isolation of the two sides of the space is achieved by setting an isolation belt that moves with the motion mechanism. However, the isolation belt may become fatigued due to installation reasons or long-term use, resulting in the tension of the isolation belt not meeting the requirements and failing to form a seal at the connecting channel, which will cause its dustproof and heat-insulating effects to deteriorate, thereby reducing the molding accuracy of the 3D printer, or causing the 3D printer to be unable to operate stably. Utility Model Content

[0004] The purpose of the utility model is to provide a motion isolation mechanism and a 3D printer to solve the technical problems in the prior art. It can automatically tension the isolation belt when the tensioning force of the isolation belt does not meet the requirements, thereby maintaining sealing at the connecting channel, avoiding the technical problem that the molding accuracy of the 3D printer is reduced due to the deterioration of the dustproof and heat insulation effects of the isolation belt, or causing the 3D printer to be unable to operate stably.

[0005] The utility model provides a motion isolation mechanism, comprising:

[0006] Moving parts;

[0007] an isolating member, the moving member being connected to the isolating member;

[0008] A first retractable member, a first end of the isolating member being wound around the first retractable member, and the isolating member located between the first retractable member and the moving member forming a first segment;

[0009] A second retractable member, the second end of the isolating member is wound around the second retractable member, and the isolating member located between the second retractable member and the moving member forms a second segment;

[0010] A driving unit, used for driving the moving member and the isolating member to move in the same direction along a preset path;

[0011] in:

[0012] When the moving member moves toward the side close to the first retractable member, the moving speed of the first segment is greater than or equal to the moving speed of the moving member, and the moving speed of the second segment is less than or equal to the moving speed of the moving member;

[0013] When the moving member moves toward the side close to the second retractable member, the moving speed of the second segment is greater than or equal to the moving speed of the moving member, and the moving speed of the first segment is less than or equal to the moving speed of the moving member;

[0014] So that the isolation member located between the first retractable member and the second retractable member remains in a tensioned state.

[0015] A motion isolation mechanism as described above, wherein, preferably, the isolation member includes an isolation belt, the first retractable member and the second retractable member both include retractable reels, the two retractable reels are respectively connected to the movable ends of the isolation belt, and the movable member is fixedly connected to the isolation belt.

[0016] In the motion isolation mechanism as described above, preferably, the driving unit includes a first power source, a transmission member and a speed regulating member, wherein:

[0017] The moving member is connected to the transmission member, and the first power source can drive the transmission member to move, thereby driving the moving member to move along the preset path, or the first power source can drive the moving member to move, thereby driving the transmission member to move along the preset path;

[0018] Each of the retractable reels is connected to a speed regulating component, and the speed regulating component is connected to the transmission component. The first power source drives the two retractable reels to reel and unreel alternately through the speed regulating component.

[0019] A motion isolation mechanism as described above, wherein, preferably, the driving unit comprises a first power source and a second power source, wherein:

[0020] The moving member is connected to the first power source, and the first power source can drive the moving member to move along the preset path;

[0021] Each of the retractable reels is connected to a second power source, and the second power source drives the two retractable reels to reel and unreel alternately.

[0022] A motion isolation mechanism as described above, wherein preferably, the transmission member includes a first belt body and at least two transmission wheels, the first belt body is wound around the transmission wheels, the moving member is connected to the first belt body, and the output end of the first power source is power-connected to one of the transmission wheels.

[0023] A motion isolation mechanism as described above, wherein preferably, the speed regulating component includes a first speed regulating wheel, a second speed regulating wheel and a second belt body, the second belt body is wound around the first speed regulating wheel and the second speed regulating wheel, the first speed regulating wheel is transmission connected to one of the transmission wheels, and the second speed regulating wheel is transmission connected to the retractable reel.

[0024] A motion isolation mechanism as described above, wherein preferably, the drive unit also includes a one-way overrunning clutch, the outer ring of the one-way overrunning clutch is transmission-connected to the reel, and the inner ring of the one-way overrunning clutch is transmission-connected to the second speed regulating wheel, so that when the reel is used for rewinding, the reel and the second speed regulating wheel achieve power transmission, and when the reel is used for unwinding, the reel and the second speed regulating wheel achieve power separation.

[0025] A motion isolation mechanism as described above, wherein preferably, the drive unit also includes a speed overrunning clutch component, and the speed overrunning clutch component is at least partially connected between the retractable reel and the one-way overrunning clutch, so that the retractable reel and the one-way overrunning clutch can achieve power transmission or separation.

[0026] A motion isolation mechanism as described above, wherein, preferably, the speed overrunning clutch component includes a main speed overrunning clutch and an auxiliary speed overrunning clutch, and the motion isolation mechanism also includes a bracket, the main speed overrunning clutch is connected between the reel and the one-way overrunning clutch, the auxiliary speed overrunning clutch is connected between the reel and the bracket, so that the reel and the one-way overrunning clutch can achieve power separation and transmission, and the auxiliary speed overrunning clutch is connected between the reel and the bracket, so that the reel and the bracket can achieve power transmission or separation.

[0027] In a second aspect, the utility model further provides a three-dimensional printer, comprising:

[0028] First chamber;

[0029] Second chamber;

[0030] a communication channel, located between the first chamber and the second chamber, wherein opposite ends of the communication channel are connected to the first chamber and the second chamber respectively; and

[0031] at least one of the aforementioned motion isolation mechanisms;

[0032] in:

[0033] The motion isolation mechanism is at least partially disposed in the first chamber, and includes a moving part, an isolating part, a first retractable part, a second retractable part, and a driving unit, wherein the driving unit is used to drive the moving part and the isolating part to move in the same direction along a preset path, and to keep the isolating part between the first retractable part and the second retractable part in a tensioned state to seal the communication channel.

[0034] In the three-dimensional printer as described above, preferably, a plurality of the first chambers are provided, the plurality of the first chambers are arranged on the outer circumference of the second chamber, and the motion isolation mechanism is provided between at least two of the first chambers and the second chamber.

[0035] Compared with the prior art, the utility model utilizes a driving unit to drive the first and second retracting members to reel and unreel the isolation member, so that the isolation member is in a tensioned state. The isolation member can move with the movement of the moving member to achieve isolation of the space on both sides of the motion isolation mechanism, and during the operation of the motion isolation mechanism, the driving unit makes the unwinding speed of the isolation member less than or equal to the moving speed of the moving load, and makes the rewinding speed of the isolation member greater than or equal to the moving speed of the moving member, so that the isolation member is in a tensioned state, that is, the motion isolation mechanism provided by the utility model can adjust the rewinding speed and / or unwinding speed of the isolation member to tension the isolation member when the tensioning force of the isolation member does not meet the requirements, so as to ensure that the tensioning force of the isolation member meets the requirements during the operation, avoid the deterioration of the dustproof and heat insulation effects of the motion isolation mechanism, thereby ensuring the molding accuracy of the 3D printer and ensuring that the 3D printer can operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a first working state of the motion isolation mechanism in the first embodiment provided in the present application;

[0037] Figure 2 A schematic diagram of a second working state of the motion isolation mechanism in the first embodiment provided in the present application;

[0038] Figure 3 This is a schematic diagram of the structure of the motion isolation mechanism in the second embodiment provided in the present application;

[0039] Figure 4 A schematic diagram of a first working state of the motion isolation mechanism in Embodiment 3 provided in the present application;

[0040] Figure 5A schematic diagram of a second working state of the motion isolation mechanism in the third embodiment provided in the present application;

[0041] Figure 6 A schematic diagram of a first working state of a one-way overrunning clutch provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of a second working state of the one-way overrunning clutch provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the structure of a speed overrunning clutch component provided in an embodiment of the present application;

[0044] Fig. 9 A schematic diagram of the structure of a three-dimensional printer provided in an embodiment of the present application;

[0045] Fig.10 A schematic structural diagram of a motion isolation mechanism provided in an embodiment of the present application from a first perspective;

[0046] Fig.11 A schematic structural diagram of a motion isolation mechanism provided in an embodiment of the present application from a second perspective;

[0047] Fig.12 This is a schematic diagram of the structure of the partition provided in the embodiment of the present application;

[0048] Fig.13 A schematic diagram of the structure of another three-dimensional printer provided in an embodiment of the present application;

[0049] Description of reference numerals:

[0050] 10-mobile load, 11-mobile part, 12-printing module, 13-powder spreading module, 14-energy module;

[0051] 20-isolator, 21-first segment, 22-second segment;

[0052] 30-retractable reel, 31-first retractable member, 32-second retractable member;

[0053] 40-driving unit, 41-first power source, 42-second power source, 43-first belt body, 44-transmission wheel, 45-first speed regulating wheel, 46-second speed regulating wheel, 47-second belt body, 48-one-way overrunning clutch, 481-inner ring, 482-outer ring, 483-ball, 49-speed overrunning clutch component, 491-main speed overrunning clutch, 492-auxiliary speed overrunning clutch;

[0054] 50-first chamber;

[0055] 60 - second chamber;

[0056] 70-partition, 71-connecting channel;

[0057] 80-Stand;

[0058] 100-Motion isolation mechanism;

[0059] 200-3D printer. DETAILED DESCRIPTION

[0060] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0061] like Figures 1 to 5 As shown, an embodiment of the present application provides a motion isolation mechanism 100, comprising:

[0062] Moving member 11, such as Figure 8 and Fig.12 As shown, the moving part 11 serves as a carrier and can carry one or more of the printing module 12, the powder spreading module 13 and the energy module 14. In the embodiment provided in the present application, the moving part 11 together with one or more of the printing module 12, the powder spreading module 13 and the energy module 14 are collectively referred to as a mobile load 10.

[0063] The isolating member 20 is connected to the moving member 11 , and the isolating member 20 can move along with the movement of the moving member 11 .

[0064] The first retractable member 31, the first end of the isolation member 20 is wound on the first retractable member 31 to reel in or unreel the isolation member 20, the isolation member 20 located between the first retractable member 31 and the movable member 11 forms a first segment 21, the length of the first segment 21 increases or decreases according to the movement of the isolation member 20, when the first retractable member 31 reels the isolation member 20, the length of the first segment 21 decreases accordingly, and when the first retractable member 31 unreeles the isolation member 20, the length of the first segment 21 increases accordingly.

[0065] The second retractable member 32, the second end of the isolation member 20 is wound on the second retractable member 32 to perform a reeling or unreeling operation on the isolation member 20. When the first retractable member 31 reels the isolation member 20, the second retractable member 32 is in a state of unreeling the isolation member 20. When the first retractable member 31 unreels the isolation member 20, the second retractable member 32 is in a state of reeling the isolation member 20. The isolation member 20 located between the second retractable member 32 and the movable member 11 forms a second segment 22. When the second retractable member 32 unreels the isolation member 20, the length of the second segment 22 increases accordingly. When the second retractable member 32 reels the isolation member 20, the length of the second segment 22 decreases accordingly.

[0066] The driving unit 40 is used to drive the moving member 11 and the isolating member 20 to move in the same direction along a preset path. The preset path is the path of the moving load 10 required for three-dimensional printing. In the embodiment provided in the present application, the preset path is a linear movement path. In other embodiments, the preset path may also be a curved movement path, which is not limited here. The driving unit 40 also keeps the isolating member 20 located between the first retractable member 31 and the second retractable member 32 in a tensioned state. For example, referring to Figure 8 as well as Fig. 9 As shown, when the isolation member 20 is a belt structure, the tensioned state of the isolation member 20 is that the isolation member 20 maintains a flat surface, the isolation side of the isolation member 20 is located at the same horizontal height, and the isolation member 20 fits tightly on the connecting channel 71, thereby forming a good seal for the connecting channel 71.

[0067] In order to keep the isolation member 20 in a tensioned state, the driving unit 40 provided in the present application has the following functions:

[0068] First, when the movable member 11 moves toward the side close to the first retractable member 31, that is, when the first retractable member 31 is performing a reeling operation, the moving speed of the first segment 21 is greater than or equal to the moving speed of the movable member 11, so as to increase or maintain the tensioning force of the first segment 21, thereby tensioning the first segment 21, and the moving speed of the second segment 22 is less than or equal to the moving speed of the movable member 11, so as to increase or maintain the tensioning force of the second segment 22, thereby tensioning the second segment 22, so that the isolation member 20 located between the first retractable member 31 and the second retractable member 32 remains in a tensioned state.

[0069] Second: when the movable member 11 moves toward the side close to the second retractable member 32, that is, when the second retractable member 32 is performing a reeling operation, the moving speed of the second segment 22 is greater than or equal to the moving speed of the movable member 11, so as to increase or maintain the tensioning force of the second segment 22 and thus tension the second segment 22, and the moving speed of the first segment 21 is less than or equal to the moving speed of the movable member 11, so as to increase or maintain the tensioning force of the first segment 21 and thus tension the first segment 21, so that the isolation member 20 located between the first retractable member 31 and the second retractable member 32 remains in a tensioned state.

[0070] In the embodiment provided by the present application, since the movable member 11 is fixedly connected to the isolation member 20 and driven by the driving unit 40, during the operation of the motion isolation mechanism 100, one of the first segment 21 and the second segment 22 is defined as a winding segment, and the other is defined as an unwinding segment. For example, when the first winding member 31 is winding and the second winding member 32 is unwinding, the first segment 21 is the winding segment, and the second segment 22 is the unwinding segment. At this time, the moving speed of the first segment 21 is called the winding speed V, and the moving speed of the second segment 22 is called the unwinding speed V'; conversely, when the first winding member 31 is unwinding and the second winding member 32 is winding, the first segment 21 is the unwinding segment, and the second segment 22 is the winding segment. At this time, the moving speed of the first segment 21 is called the unwinding speed V', and the moving speed of the second segment 22 is called the winding speed V.

[0071] The driving unit 40 is used to provide the isolation member 20 with a winding speed V and / or an unwinding speed V' that is different from the moving speed v of the moving member 11 when the tensioning force of the isolation member 20 is less than the preset tensioning force, and to provide the isolation member 20 with a winding speed V and / or an unwinding speed V' that is equal to the moving speed v of the moving member 11 when the tensioning force of the isolation member 20 is equal to the preset tensioning force.

[0072] Specifically, during the movement of the moving member 11, the tensioning force of the winding section and the tensioning force of the unwinding section on the isolation member 20 are divided into several situations:

[0073] First, when the tensions of the winding section and the unwinding section are both equal to the preset tensions, the winding speed V and the unwinding speed V′ are both equal to the moving speed v of the moving member 11 .

[0074] Secondly, when the tensioning force of the winding section is equal to the preset tensioning force and the tensioning force of the unwinding section is less than the preset tensioning force, the winding speed V is equal to the moving speed v of the movable part 11 to keep the tensioning force of the winding section at the preset tensioning force, and the unwinding speed V' is less than the moving speed v of the movable part 11 to increase the tensioning force of the unwinding section and thus tension the unwinding section.

[0075] Third, when the tension of the unwinding section is equal to the preset tension and the tension of the winding section is less than the preset tension, the winding speed V is greater than the moving speed v of the movable member 11 to increase the tension of the winding section and thus tension the winding section, and the unwinding speed V' is equal to the moving speed v of the movable member 11 to keep the tension of the unwinding section at the preset tension.

[0076] Fourthly, when the tensioning forces of the winding section and the unwinding section are both less than the preset tensioning forces, the winding speed V is greater than the moving speed v of the movable member 11 to increase the tensioning force of the winding section and thereby tension the winding section, and the unwinding speed V' is less than the moving speed v of the movable member 11 to increase the tensioning force of the unwinding section and thereby tension the unwinding section.

[0077] Those skilled in the art will appreciate that the shape, structure and material of the isolation member 20 can be adaptively modified according to actual conditions, and are not limited thereto. The isolation member 20 can have a variety of shapes, so long as it can seal the connecting channel 71 to isolate the spaces on both sides to avoid medium exchange between the spaces on both sides. In a feasible implementation, the isolation member 20 is a strip-shaped isolation belt, and the movable member 11 is fixedly connected to the isolation belt, wherein: the isolation belt can be a complete long strip body, in which case the movable member 11 is fixedly connected to a complete isolation member 20; the isolation belt can also be two segmented strip bodies, in which case the two ends of the movable member 11 are respectively fixed to one end of two independent isolation members 20.

[0078] In the embodiments provided in this application, refer to Figures 1 to 5 As shown, the first retractable member 31 and the second retractable member 32 both include a retractable reel 30, and the retractable reel 30 can be rotatably supported on the bracket 80 along its own axis as the center line. In a feasible implementation manner, the axial directions of the two retractable reels 30 are parallel to each other, and there is a certain interval between the two on the plane where the axes are located. The two retractable reels 30 have the same rotation direction, and both rotate clockwise or counterclockwise, so that while one is reeling, the other is performing an unreeling operation. The two retractable reels 30 are respectively connected to the movable end of the isolation belt, and the movable end of the isolation belt refers to one end of the isolation belt wound around the retractable reel 30. When the retractable reel 30 rotates clockwise or counterclockwise, the retractable reel 30 performs a reeling or unreeling operation at the movable end of the isolation belt.

[0079] Several embodiments of the driving unit 40 are listed below to illustrate the structure of the motion isolation mechanism 100. Those skilled in the art can make adaptive changes to the structure of the driving unit 40 in the motion isolation mechanism 100 according to the following embodiments, so as to achieve the goal of keeping the isolation member 20 located between the first retractable member 31 and the second retractable member 32 in a tensioned state.

[0080] Embodiment 1

[0081] Reference Figure 1 as well as Figure 2 As shown, in the present embodiment, the driving unit 40 includes a first power source 41, a transmission member and a speed regulating member. Each reel 30 is connected to a speed regulating member, and the speed regulating member is connected to the transmission member. Specifically, two speed regulating members are provided, and the two speed regulating members correspond to the two reel 30 one by one. The two reel 30 are respectively connected to the transmission member through the corresponding speed regulating members. The power of the first power source 41 is transmitted to the reel 30 via the transmission member and the speed regulating member. The two reel 30 realizes reeling and unwinding under the drive of the first power source 41.

[0082] In a feasible implementation manner, the transmission member includes a first belt body 43 and at least two transmission wheels 44. The first belt body 43 is wound around the transmission wheel 44 and is tensioned by the transmission wheel 44. In this embodiment, the cross-section of the first belt body 43 is a circular runway structure, and the transmission wheels 44 are tensioned at the opposite ends of the long axis direction of the first belt body 43. Those skilled in the art can know that the cross-section of the first belt body 43 can also be a triangular, quadrilateral or other structure, which is not limited here. A transmission wheel 44 is provided at each corner end of the first belt body 43 for tensioning and transmitting power.

[0083] The movable member 11 is connected to the first belt body 43, and the output end of the first power source 41 is power-connected to one of the transmission wheels 44. The transmission wheel 44 is a component that transmits the power provided by the first power source 41 to the movable member 11 and the retracting and unwinding shaft 30. That is, the first power source 41 transmits power to the movable member 11 through the transmission wheel 44 and the first belt body 43, and each retracting and unwinding shaft 30 is power-connected to the corresponding transmission wheel 44 through a speed regulating component.

[0084] The power transmission process of the first power source 41 is as follows: the first power source 41 works, and its power is transmitted to the connected transmission wheel 44, causing the transmission wheel 44 to rotate, and the first belt body 43 rotates accordingly, and the moving member 11 on the first belt body 43 also follows the first belt body 43 to move in a straight line on a preset path. At the same time, the rotation of the first belt body 43 causes all the transmission wheels 44 in contact with the first belt body 43 to rotate synchronously, and then the reel 30 is driven to rotate through the speed regulating component to reel in.

[0085] In actual use, the 3D printer 200 may need to manually change the position of the moving part 11 when the power is off to repair the 3D printer 200. If the isolation member 20 cannot follow the movement of the moving member 11 to reel in and out when the position of the moving member 11 is changed, it may cause damage to the isolation member 20 or inconvenience in maintenance. Therefore, it is hoped that the reel 30 can follow the movement of the moving member 11 to reel in and out of the isolation member 20 when the power is off. In the present embodiment, the reel 30 is connected to the transmission member through a speed regulating member. When the equipment is repaired when the power is off, the linear movement of the moving member 11 on the first belt body 43 can be converted into the rotational movement of the reel 30 through the transmission wheel 44 and the speed regulating member, so that the reel 30 follows the movement of the moving member 11 to reel in and out, avoiding the inconvenience caused by the inability to reel the isolation member 20 during power outage maintenance.

[0086] In this embodiment, refer to Figure 1 as well as Figure 2 As shown, the speed regulating component includes a first speed regulating wheel 45, a second speed regulating wheel 46 and a second belt body 47, the second belt body 47 is wound around the first speed regulating wheel 45 and the second speed regulating wheel 46, the first speed regulating wheel 45 is transmission-connected to a transmission wheel 44, the second speed regulating wheel 46 is transmission-connected to the reel 30, wherein the transmission connection mode can be various, such as coaxial connection, gear set meshing connection or synchronous belt connection and other forms, so as to achieve power transmission. In this embodiment, a coaxial connection power transmission mode is adopted, the rotating shaft of the first speed regulating wheel 45 is coaxially arranged with the transmission wheel 44, and the rotating shaft of the second speed regulating wheel 46 is coaxially arranged with the reel 30, which can improve the power transmission efficiency while simplifying the power transmission structure.

[0087] In order to realize the alternate winding and unwinding of the winding and unwinding reel 30, the driving unit 40 further includes a one-way overrunning clutch 48, which is an important component for realizing the power transmission and separation functions. Figure 1 as well as Figure 2 As shown, the one-way overrunning clutch 48 is connected to the retracting and unreeling reel 30 in a transmission manner. Specifically, the first retracting and unreeling member 31 and the second retracting and unreeling member 32 are both connected to the one-way overrunning clutch 48. Figure 6 and Figure 7 As shown, the one-way overrunning clutch 48 includes an inner ring 481, an outer ring 482 and a ball 483. The reel 30 is transmission-connected to the outer ring 482, and the second speed regulating wheel 46 is transmission-connected to the inner ring 481, preferably coaxially connected. The one-way overrunning clutch 48 is used to transmit the power of the first power source 41 to the reel 30, or to prevent the power of the first power source 41 from being transmitted to the reel 30.

[0088] Specifically, refer to Figure 6As shown, when the reel 30 is used for rewinding, the inner ring 481 drives the outer ring 482 to rotate synchronously. At this time, when the power of the first power source 41 is transmitted to the inner ring 481 via the second speed regulating wheel 46, the power can continue to be transmitted to the outer ring 482, and then drive the reel 30 for rewinding to rotate, so that the reel 30 for rewinding can be driven to rotate by the first power source 41; Figure 7 As shown, when the reel 30 is used for unwinding, the inner ring 481 is movably arranged relative to the outer ring 482. At this time, the rotation of the inner ring 481 will no longer drive the outer ring 482 to rotate. After the power of the first power source 41 is transmitted to the inner ring 481 via the second speed regulating wheel 46, the inner ring 481 rotates relative to the outer ring 482 through the ball 483, and the power cannot be transmitted to the outer ring 482, so that the reel 30 used for unwinding cannot be driven to rotate by the first power source 41, and can rotate freely under the tension of the isolation belt.

[0089] More specifically, see Figure 6 As shown, when the reel 30 is used for rewinding, the ball 483 cannot roll, and the power shaft (the rotating shaft of the second speed regulating wheel 46 in this embodiment) can drive the inner ring 481, the ball 483, the outer ring 482 and the reel 30 to rotate together, so as to transmit the power of the power shaft to the reel 30; Figure 7 As shown, when the reel 30 is used for unwinding, the ball 483 can roll, and the power shaft and the inner ring 481 can rotate relative to the outer ring 482 and the reel 30 through the rolling of the ball 483 to prevent the power of the first power source 41 from being transmitted to this reel 30.

[0090] In this embodiment, the installation directions of the one-way overrunning clutch 48 connected to the first retractable member 31 and the one-way overrunning clutch 48 connected to the second retractable member 32 are opposite, so that the first retractable member 31 and the second retractable member 32 can respectively realize winding and unwinding in the same rotation direction. For example, when the first retractable member 31 rotates along the first rotation direction to perform winding, the second retractable member 32 also rotates along the first rotation direction to perform unwinding. At this time, the one-way overrunning clutch 48 connected to the first retractable member 31 transmits the power of the power shaft to the corresponding retractable reel 30, and this retractable reel 30 realizes the winding function, and the one-way overrunning clutch 48 connected to the second retractable member 32 prevents the power of the power shaft from being transmitted to the corresponding retractable reel 30, and this retractable reel 30 realizes the unwinding function.

[0091] In the prior art, the tension of the isolation member 20 is adjusted by setting a sensor to monitor the tension of the isolation member 20 and dynamically adjusting the working parameters of the driving unit 40 according to the monitored tension. This method is costly and complex to control. To solve the above technical problems, this embodiment reduces costs and simplifies control by setting a speed overrunning clutch component 49.

[0092] The speed overrunning clutch component 49 is at least partially connected between the reel 30 and the one-way overrunning clutch 48 to enable the reel 30 and the one-way overrunning clutch 48 to achieve power transmission or separation.

[0093] The speed overrunning clutch component 49 may be a friction damper and / or a magnetic damper. The model of the speed overrunning clutch component 49 may be selected according to the size of the preset tensioning force, and this embodiment does not impose any specific limitation on this.

[0094] The following combination Figure 1 and Figure 2 It is specifically introduced how to make the winding speed V of the isolation member 20 greater than the moving speed v of the movable member 11 when the tensioning force of the isolation member 20 is less than the preset tensioning force, and make the unwinding speed V' of the isolation member 20 less than the moving speed v of the movable member 11; and when the tensioning force of the isolation member 20 is equal to the preset tensioning force, make the winding speed V and unwinding speed V' of the isolation member 20 equal to the moving speed v of the movable member 11.

[0095] Specifically, when the tension of the isolating member 20 is equal to the preset tension, the reel 30 can slide relative to the speed overrunning clutch component 49 (i.e., the reel 30 is disengaged from the one-way overrunning clutch 48) to avoid the increase of tension and excessive tension of the isolating member 20. When the tension of the isolating member 20 is less than the preset tension, the reel 30 is fixed relative to the speed overrunning clutch component 49 (i.e., the reel 30 is engaged with the one-way overrunning clutch 48) to increase the tension and thus tension the isolating member 20. With such a configuration, it is only necessary to make the linear speed (i.e., the reeling speed V) of the reel 30 when reeling synchronously with the power shaft for reeling greater than the moving speed v of the moving member 11. Specifically, it is only necessary to set the rotation speed ω of the power shaft according to the radius R3 of the reel 30 and the moving speed v of the moving member 11. Specifically, V=ωR3>v, i.e., ω>v / R3.

[0096] More specifically, the isolating member 20 generates a first pulling force on the reel 30, and the speed overrunning clutch member 49 generates a second pulling force on the reel 30 which is opposite to the first pulling force, wherein:

[0097] When the first tension is less than the preset tension, the second tension is equal to the first tension, and the reel 30 is fixed relative to the speed overrunning clutch component 49. For the reeling section, the reel 30 is used for reeling. Since the power of the power shaft can be transmitted to the reel 30, the reel 30 rotates synchronously with the power of the power shaft to reel. At this time, the reeling speed V of the reel 30 is equal to ωR3 and is greater than the moving speed v of the moving member 11, so that the first tension increases and the reeling section of the isolation member 20 is tensioned; for the unwinding section, the reel 30 is used for unwinding. Since the power of the power shaft is prevented from being transmitted to the reel 30, the reel 30 is stationary and does not unwind. At this time, the unwinding speed V' of the reel 30 is 0 and is less than the moving speed v of the moving member 11, so that the first tension increases and the unwinding section of the isolation member 20 is tensioned.

[0098] When the first pulling force is equal to the preset tensioning force, the second pulling force is smaller than the first pulling force, so that the retracting and unretracting reel 30 slides relative to the speed overrunning clutch component 49 . As for the winding section, the unwinding reel 30 is used for winding, and the unwinding reel 30 follows the asynchronous rotation of the power shaft to wind. At this time, the rotation speed ω3 of the unwinding reel 30 is less than the rotation speed ω of the power shaft, that is, the winding speed V of the unwinding reel 30 is equal to ω3R3 but less than ωR3, and the excess speed of the output of the power shaft is released by the speed overrunning clutch component 49, so that the winding speed V of the unwinding reel 30 is equal to the moving speed v of the moving part 11 and the first tension is kept equal to the preset tension, thereby avoiding the first tension from continuing to increase and over-tensioning the unwinding section of the isolation member 20; as for the unwinding section, the unwinding reel 30 is used for unwinding, and the unwinding reel 30 follows the movement of the moving part 11 to unwind, that is, the unwinding speed V' of the unwinding reel 30 is equal to the moving speed v of the moving part 11 and the first tension is kept equal to the preset tension, thereby avoiding the first tension from continuing to increase and over-tensioning the unwinding section of the isolation member 20.

[0099] It can be understood that the maximum value of the second pulling force generated by the speed overrunning clutch component 49 on the retractable reel 30 is slightly smaller than the preset tensioning force.

[0100] In actual use, if the one-way overrunning clutch 48 is suspended as a whole, that is, all components of the one-way overrunning clutch 48 have no supporting points that can make it relatively fixed, when the power shaft drives the inner ring 481 to rotate, its outer ring 482 may follow the inner ring 481 under the action of friction and rotate in the same direction as the inner ring 481, which will cause the motion isolation mechanism 100 to fail to work normally.

[0101] Therefore, in this embodiment, it is preferred that reference Figure 8As shown, the speed overrunning clutch component 49 includes a main speed overrunning clutch 491 and an auxiliary speed overrunning clutch 492, and the motion isolation mechanism 100 also includes a bracket 80. The main speed overrunning clutch 491 is arranged between the one-way overrunning clutch 48 and the reel 30, and the auxiliary speed overrunning clutch 492 is connected between the reel 30 and the bracket 80. The reel 30 and the main speed overrunning clutch 491 and the reel 30 and the auxiliary speed overrunning clutch 492 can independently realize power transmission or separation. Specifically, the main speed overrunning clutch 491 and the auxiliary speed overrunning clutch 492 are arranged at both ends of the reel 30, and the arrangement of the auxiliary speed overrunning clutch 492 and the bracket 80 enables the outer ring 482 of the one-way overrunning clutch to be relatively fixed, thereby preventing the outer ring 482 (reel 30) from rotating in the same direction with the inner ring 481. At this time, the second pulling force as described above is provided by the main speed overrunning clutch 491 and the auxiliary speed overrunning clutch 492.

[0102] like Figure 1 and Figure 2 As shown, in order to make the isolation member 20 in a tensioned state, it is necessary to further set the radius of the transmission wheel 44, the first speed regulating wheel 45, the second speed regulating wheel 46 and the reel 30 according to the above speed requirements. Specifically, since it is necessary to make the linear speed of the reel 30 when reeling in accordance with the synchronous rotation of the power shaft (i.e., the reeling speed V) be greater than the linear speed of the transmission wheel 44 (i.e., the moving speed v of the moving member 11), i.e., ω3*R3>ω0*R0---Formula (1), and the rotation speed ω1 of the first speed regulating wheel 45 is equal to the rotation speed ω0 of the transmission wheel 44. , that is, ω1=ω0---Formula (2), the rotational speed ω of the second speed regulating wheel 46 is equal to the rotational speed ω3 of the reel 30, that is, ω=ω3---Formula (3), the linear speed of the first speed regulating wheel 45 is equal to the linear speed of the second speed regulating wheel 46, that is, ω1*R1=ω*R2---Formula (4), therefore, combining Formula (1)-Formula (4), the radius R0 of the transmission wheel 44 is smaller than the ratio of the product of the radius R1 of the first speed regulating wheel 45 and the radius R3 of the reel 30 to the radius R2 of the second speed regulating wheel 46, that is, R0<(R1*R3) / R2.

[0103] Embodiment 2

[0104] In this embodiment, unlike the driving unit 40 of the first embodiment, the transmission wheel 44 is not a component that transmits the power provided by the first power source 41 to the moving part 11, that is, the first power source 41 does not transmit the power to the moving part 11 through the transmission wheel 44. The first power source 41 first directly drives the moving part 11 to move, and then drives the transmission part to move along the preset path.

[0105] For example, refer to Figure 3As shown, the first power source 41 is a linear motor, which includes a power unit. The power unit includes a primary and a secondary. When current is passed through the primary, a traveling wave magnetic field is generated in the air gap between the primary and the secondary. A driving force is generated under the action of the traveling wave magnetic field and the secondary permanent magnet, thereby moving the movable member 11, and the movable member 11 drives the first belt body 43 to move. The power is transmitted through the first belt body 43, so that all the transmission wheels 44 in contact with the first belt body 43 also rotate synchronously, and then the reel 30 is driven by the speed regulating component to achieve rotation at different speeds, so that the isolation member 20 is reeled or unreeled.

[0106] In this embodiment, the first power source 41 can directly drive the moving part 11 to move. The movement of the moving part 11 does not need to consider whether the transmission part 11 will cause obstruction. When the 3D printer 200 needs to be powered off, the position of the moving part 11 can also be manually adjusted. The linear movement of the moving part 11 can be converted into the rotational movement of the reel 30 through the transmission wheel 44 and the speed regulating component, so that the reel 30 follows the movement of the moving part 11 to reel in and out, avoiding the inconvenience caused by the inability to reel in the isolation part 20 during power outage maintenance.

[0107] Embodiment 3

[0108] In this embodiment, unlike the first embodiment, there is no first speed regulating wheel 45 and second speed regulating wheel 46, and the driving unit 40 drives the first belt body 43 and the retracting and unreeling shaft 30 separately, and the driving unit 40 includes a first power source 41 and a second power source 42, wherein: Figure 4 and Figure 5 As shown, the driving unit 40 may further include a transmission member, and the moving member 11 is connected to the transmission member. The structures of the first power source 41 and the transmission member may refer to the relevant contents of the first embodiment, and will not be described in detail here. The first power source 41 may drive the transmission member to move, and then drive the moving member 11 to move along a preset path, that is, the first power source 41 transmits power to the moving member 11 through the transmission wheel 44 and the first belt body 43; or,

[0109] The moving member 11 is connected to the first power source 41, and the first power source 41 can drive the moving member 11 to move along a preset path, wherein the first power source 41 can be a linear motor (refer to Figure 3 ).

[0110] Each reel 30 is connected to a second power source 42, and the second power source 42 drives the two reel 30 to reel and unreel alternately. The second power source 42 includes two drive motors, which are respectively connected to the two reel 30, and independently control the rotation direction and rotation speed of each reel 30. By setting the working parameters of the drive motor, the isolation member 20 can be simply and reliably placed in a tensioned state, with good operability, simple structure, and easy maintenance.

[0111] In the present embodiment, since the rotation direction and rotation speed of each reel 30 are individually controlled by a drive motor, a one-way overrunning clutch 48 may not be provided. For example, one of the reel 30 is driven by the corresponding drive motor to rotate counterclockwise for rewinding, while the drive motor corresponding to the other reel 30 rotates clockwise. Since a speed overrunning clutch component 49 is provided between the reel 30 and the drive motor, when the driving force for clockwise rotation is too large, the speed overrunning clutch component 49 releases the excess driving force of the drive motor, thereby disconnecting the power transmission between the reel 30 and the reel.

[0112] Based on the motion isolation mechanism 100 provided in the above embodiment, Figures 9 to 13 As shown, the present application also provides a three-dimensional printer 200, including:

[0113] The first chamber 50 is used to install at least part of the control components that control the operation of the 3D printer 200. The control components may include one or more electronic devices such as a controller, a processor, a memory, and a driver.

[0114] The second chamber 60 is used to perform a molding operation to form a three-dimensional object.

[0115] The communication channel 71 is located between the first chamber 50 and the second chamber 60. The two opposite ends of the communication channel 71 are connected to the first chamber 50 and the second chamber 60 respectively. In a feasible embodiment, a partition plate 70 is provided between the first chamber 50 and the second chamber 60. Fig.12 As shown, a communication channel 71 is opened on the partition plate 70 , and the extending direction of the communication channel 71 is the same as the preset path moving direction of the moving member 11 and the isolation member 20 .

[0116] in:

[0117] The first chamber 50 is provided with the aforementioned motion isolation mechanism 100, and the motion isolation mechanism 100 includes a moving part 11, an isolating part 20, a first retractable part 31, a second retractable part 32 and a driving unit 40. In a feasible embodiment, the first end of the moving part 11 is located in the first chamber 50 and is connected to the isolating part 20, and the second end of the moving part 11 extends into the second chamber 60 after passing through the connecting channel 71 on the partition 70. At least one of the printing module 12, the powder spreading module 13 and the energy module 14 is provided on the second end of the moving part 11 to form a moving load 10. Those skilled in the art may know that in another embodiment, the moving part 11 may be accommodated in the first chamber 50, and at least one of the printing module 12, the powder spreading module 13 and the energy module 14 may pass through the connecting channel 71 and be connected to the moving part 11, which is not limited here.

[0118] The driving unit 40 is used to drive the moving member 11 and the isolating member 20 to move in the same direction along a preset path. While performing the forming operation, the driving unit 40 drives the first retracting member 31 and the second retracting member 32 to reel and unreel the isolating member 20, so that the isolating member 20 is in a tensioned state. The isolating member 20 can move along with the movement of the moving member 11 to achieve isolation of the space on both sides of the motion isolation mechanism 100, and during the operation of the motion isolation mechanism 100, the driving unit 40 makes the unwinding speed V' of the isolating member 20 less than or equal to the moving speed v of the moving member 11, and makes the rewinding speed V of the isolating member 20 greater than or equal to the moving speed v of the moving member 11, so that the isolating member 20 is in a tensioned state.

[0119] That is, the motion isolation mechanism 100 in the 3D printer 200 provided by the utility model can tension the isolation member 20 by adjusting the winding speed V and / or the unwinding speed V' of the isolation member 20 when the tensioning force of the isolation member 20 does not meet the requirements, thereby ensuring that the tensioning force of the isolation member 20 during operation meets the requirements, avoiding the deterioration of the dustproof and heat insulation effects of the motion isolation mechanism 100, thereby ensuring the molding accuracy of the 3D printer 200 and ensuring that the 3D printer 200 can operate stably.

[0120] In the 3D printer 200 , the number and position of the mobile loads 10 and the motion isolation mechanism 100 can be flexibly set according to actual needs, and this embodiment does not impose any specific restrictions on this.

[0121] In a first possible implementation, if Figures 9 to 12 As shown, the mobile load 10 can be set as a cantilever structure. Specifically, a first chamber 50 and a second chamber 60 are set in the 3D printer 200. A motion isolation mechanism 100 and a mobile load 10 are set in the first chamber 50. At this time, one mobile load 10 only needs to be set corresponding to one motion isolation mechanism 100. The motion isolation mechanism 100 is set in the first chamber 50, and the printing module 12, the powder spreading module 13 and the energy module 14 are set in the second chamber 60. One end of the moving part 11 is set on the motion isolation mechanism 100. After the moving part 11 passes through the connecting channel 71, the printing module 12, the powder spreading module 13 and the energy module 14 are set at the other end of the moving part 11. The moving part 11 moves back and forth along a preset path on the motion isolation mechanism 100 to perform a molding operation.

[0122] In a second possible implementation, if Fig.13As shown, the mobile load 10 can also be set as a gantry structure. Specifically, the 3D printer 200 is provided with a plurality of first chambers 50 and a second chamber 60. The plurality of first chambers 50 are arranged on the outer circumference of the second chamber 60. A motion isolation mechanism 100 is provided between at least two first chambers 50 and the second chamber 60. Fig.13 As shown, four first chambers 50 are distributed in the outer circumference of the second chamber 60, which are respectively located in the front, back, left and right directions of the second chamber 60. A partition 70 is provided between the first chamber 50 and the second chamber 60, and a connecting channel 71 is provided on the partition 70. An independent motion isolation mechanism 100 is provided in each first chamber 50. The printing module 12, the energy module 14 and the powder spreading module 13 are arranged in the second chamber 60. The printing module 12 and the energy module 14 are connected between the moving parts 11 of the motion isolation mechanism 100 in the up and down directions shown in the figure, and the powder spreading module 13 is connected between the moving parts 11 of the motion isolation mechanism 100 in the left and right directions shown in the figure. The printing module 12 and the energy module 14 reciprocate along the first direction, and the powder spreading module 13 reciprocates along the second direction. The first direction is different from the second direction. Specifically, the first direction may be orthogonal to the second direction.

[0123] In the second feasible implementation manner, the gantry structure can be a single-drive architecture or a dual-drive architecture. When the mobile load 10 is a single-drive architecture, one motion isolation mechanism 100 is correspondingly set for one mobile load 10. The motion isolation mechanism 100 includes a driving unit 40 and two isolation members 20. The two isolation members 20 are spaced apart at both ends of the mobile load 10. The driving unit 40 is set at one end of the mobile load 10. The driving unit 40 drives the mobile load 10 to move, and the two isolation members 20 work synchronously with the movement of the mobile load 10. When the mobile load 10 is a dual-drive architecture, two motion isolation mechanisms 100 are correspondingly set for one mobile load 10. The two motion isolation mechanisms 100 are set at both ends of the mobile load 10. Each motion isolation mechanism 100 includes a driving unit 40 and an isolation member 20. The two driving units 40 work synchronously to drive the mobile load 10 to move, and the two isolation members 20 work synchronously with the movement of the mobile load 10.

[0124] In the embodiment provided in the present application, the powder laying module 13 may include a powder laying roller and / or a scraper for laying the powder material provided by the powder supply module onto the printing platform to form a powder layer. The printing module 12 may include one or more inkjet heads for depositing the liquid provided by the liquid supply module onto the powder layer to form part of the three-dimensional object. The energy module 14 includes an energy source for applying energy to the powder layer to solidify and form part of the three-dimensional object.

[0125] Wherein, the powder material is a material particle in powder form. The embodiments provided in the present application do not limit the powder material. The powder material may not undergo polymerization reaction with the liquid material, and the powder material itself may not undergo polymerization reaction. The powder material may undergo polymerization reaction with the liquid material or the powder material itself may undergo polymerization reaction, which can be flexibly changed according to actual needs. Optionally, the powder material is selected from at least one of polystyrene (PS), polyvinyl chloride (PVC), polyacrylonitrile, acrylonitrile-styrene-acrylate copolymer (ASA), polyamide (PA), polyester, polyurethane (PU), polylactic acid, poly(meth)acrylate, poly(methyl)acrylate, polyvinyl fluoride, chlorinated polyolefin, polyvinyl alcohol (PVA) containing hydroxyl groups, cellulose, and modified cellulose.

[0126] Wherein, the liquid material at least partially dissolves the powder material, and / or the liquid material undergoes thermal polymerization and / or photopolymerization reaction, and / or the liquid material undergoes polymerization reaction with the powder material. The embodiments provided in the present application do not limit the liquid material, as long as it can eventually solidify and shape the powder material sprayed with the liquid material. For example, the liquid material may contain an energy absorber, which converts the energy into heat energy after absorbing the provided energy, thereby causing the powder material in contact with it to melt and shape; or, the liquid material is a photocurable material, the liquid material contains a photocurable component, and the photocurable component can dissolve the powder material, and the photoinitiator triggers the photocurable component to undergo polymerization reaction under the irradiation of energy such as radiation energy, thereby entanglement and solidification of the dissolved powder molecules; or, the liquid material is a thermosetting material, the liquid material contains a thermosetting component, and the thermosetting component is triggered by the thermal initiator to undergo polymerization reaction under the irradiation of energy such as thermal energy, and the formed polymer wraps the powder material and shapes it; or, the liquid material has an active component that reacts with the powder material, and the initiator triggers the liquid material and the powder material to undergo polymerization reaction under the provision of energy. The liquid material may also include an auxiliary agent, which may be, for example, conventionally known materials such as an initiator, a leveling agent, a defoamer, and a surfactant. The initiator is used to initiate a reaction in the liquid material, and the initiator may be a photoinitiator, a free radical initiator, an anion initiator, a cationic initiator, etc., depending on the type of the liquid material; the leveling agent is used to improve the fluidity of the liquid material and the wetting performance of the powder material, and at the same time adjust the surface tension of the liquid material so that it can be printed normally, which is not limited in this embodiment; the defoamer is mainly used to prevent the liquid material from foaming, and the defoamer may be, for example, a silicone defoamer, a polyether defoamer, a fatty acid ester defoamer, etc.; the surfactant is mainly used to control the wettability, permeability and surface tension of the liquid material to the powder material, and the surfactant may be, for example, an anionic surfactant, a nonionic surfactant and an amphoteric surfactant.

[0127] In the embodiments provided in the present application, the energy source may be at least one of an ultraviolet lamp, an infrared lamp, a microwave transmitter, a heating wire, a heating sheet, and a heating plate. It should be noted that the specific form of the energy source selected is related to the type of liquid material and / or powder material. When the liquid material and / or powder material undergoes a photopolymerization reaction, the energy source may be an ultraviolet lamp or other component that can provide ultraviolet radiation, and the ultraviolet radiation is used to induce the liquid material and / or powder material to undergo a photopolymerization reaction; when the liquid material and / or powder material undergoes a thermal polymerization reaction, the energy source may be an infrared lamp, a microwave transmitter, a heating wire, a heating sheet, a heating plate, and other components that can provide thermal energy, and the thermal energy is used to induce the liquid material and / or powder material to undergo a thermal polymerization reaction.

[0128] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A motion isolation mechanism, characterized in that: include: Moving parts; an isolating member, the moving member being connected to the isolating member; A first retractable member, a first end of the isolating member being wound around the first retractable member, and the isolating member located between the first retractable member and the moving member forming a first segment; A second retractable member, the second end of the isolating member is wound around the second retractable member, and the isolating member located between the second retractable member and the moving member forms a second segment; A driving unit, used for driving the moving member and the isolating member to move in the same direction along a preset path; in: When the moving member moves toward the side close to the first retractable member, the moving speed of the first segment is greater than or equal to the moving speed of the moving member, and the moving speed of the second segment is less than or equal to the moving speed of the moving member; When the moving member moves toward the side close to the second retractable member, the moving speed of the second segment is greater than or equal to the moving speed of the moving member, and the moving speed of the first segment is less than or equal to the moving speed of the moving member; So that the isolation member located between the first retractable member and the second retractable member remains in a tensioned state.

2. The motion isolation mechanism according to claim 1, characterized in that: The isolation member includes an isolation belt, the first retractable member and the second retractable member both include retractable reels, the two retractable reels are respectively connected to the movable ends of the isolation belt, and the movable member is fixedly connected to the isolation belt.

3. The motion isolation mechanism according to claim 2, characterized in that: The driving unit includes a first power source, a transmission member and a speed regulating member, wherein: The moving member is connected to the transmission member, and the first power source can drive the transmission member to move, thereby driving the moving member to move along the preset path, or the first power source can drive the moving member to move, thereby driving the transmission member to move along the preset path; Each of the retractable reels is connected to a speed regulating component, and the speed regulating component is connected to the transmission component. The first power source drives the two retractable reels to reel and unreel alternately through the speed regulating component.

4. The motion isolation mechanism according to claim 2, characterized in that: The driving unit comprises a first power source and a second power source, wherein: The moving member is connected to the first power source, and the first power source can drive the moving member to move along the preset path; Each of the retractable reels is connected to a second power source, and the second power source drives the two retractable reels to reel and unreel alternately.

5. The motion isolation mechanism according to claim 3, characterized in that: The transmission member includes a first belt body and at least two transmission wheels, the first belt body is wound around the transmission wheels, the moving member is connected to the first belt body, and the output end of the first power source is connected to one of the transmission wheels.

6. The motion isolation mechanism according to claim 5, characterized in that: The speed regulating component includes a first speed regulating wheel, a second speed regulating wheel and a second belt body, the second belt body is wound around the first speed regulating wheel and the second speed regulating wheel, the first speed regulating wheel is drivingly connected to one of the transmission wheels, and the second speed regulating wheel is drivingly connected to the retractable reel.

7. The motion isolation mechanism according to claim 6, characterized in that: The drive unit also includes a one-way overrunning clutch, an outer ring of the one-way overrunning clutch is transmission-connected to the reel, and an inner ring of the one-way overrunning clutch is transmission-connected to the second speed regulating wheel, so that when the reel is used for rewinding, power is transmitted between the reel and the second speed regulating wheel, and when the reel is used for unwinding, power is separated between the reel and the second speed regulating wheel.

8. The motion isolation mechanism according to claim 7, characterized in that: The drive unit further comprises a speed overrunning clutch component, which is at least partially connected between the retractable reel and the one-way overrunning clutch, so that the retractable reel and the one-way overrunning clutch can realize power transmission or separation.

9. The motion isolation mechanism according to claim 8, characterized in that: The speed overrunning clutch component includes a main speed overrunning clutch and an auxiliary speed overrunning clutch, and the motion isolation mechanism also includes a bracket. The main speed overrunning clutch is connected between the retractable reel and the one-way overrunning clutch, and the auxiliary speed overrunning clutch is connected between the retractable reel and the bracket so that the retractable reel and the one-way overrunning clutch can achieve power separation and transmission, and the auxiliary speed overrunning clutch is connected between the retractable reel and the bracket so that the retractable reel and the bracket can achieve power transmission or separation.

10. A three-dimensional printer, characterized in that: include: First chamber; Second chamber; A communication channel, located between the first chamber and the second chamber, the communication channel connecting the first chamber and the second chamber; and At least one motion isolation mechanism according to any one of claims 1 to 9; in: The motion isolation mechanism is at least partially disposed in the first chamber, and includes a moving part, an isolating part, a first retractable part, a second retractable part, and a driving unit, wherein the driving unit is used to drive the moving part and the isolating part to move in the same direction along a preset path, and to keep the isolating part between the first retractable part and the second retractable part in a tensioned state to seal the communication channel.

11. The three-dimensional printer according to claim 10, characterized in that: There are multiple first chambers, and the multiple first chambers are arranged on the outer circumference of the second chamber. The motion isolation mechanism is arranged between at least two of the first chambers and the second chamber.

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