Powder lifting assembly and printer

Abstract

The utility model discloses a powder lifting assembly and a printer. The powder lifting assembly comprises a frame body, a rotating piece, a driving piece, a force applying assembly and a triggering piece. The frame body is used for bearing printing powder and suitable for installation of other parts, and the frame body is provided with a material bearing cavity which extends in the first direction and is suitable for bearing three-dimensional printing powder. The rotating part rotates to a spreading position and a positioning position; the driving part is suitable for driving the rotating part to rotate; the force application assembly comprises a force application piece and a moving piece, the force application piece is provided with a force application part corresponding to the positioning position, the force application part is suitable for directly or indirectly applying force to the moving piece to enable the moving piece to move, and when the rotating piece is located at the positioning position, the moving piece moves to the first position; the triggering piece sends out the positioning signal when the moving piece moves to the first position so as to achieve positioning, the follow-up rotating piece can accurately reach the material spreading position, and the risk of machine collision caused by accumulated errors generated when the rotating piece rotates is reduced. Whether the rotating piece or the triggering piece is installed or not can be judged by utilizing the characteristic that the rotating piece can be detected to be located at the positioning position.

Description

Technical Field

[0001] The utility model relates to the field of printing equipment, and particularly relates to a powder lifting assembly and a printer. Background Art

[0002] In the existing 3D powder spreading printer, a rotating member is used to lift the printing powder in the material receiving cavity to the spreading position, so that the powder spreading roller can push the powder onto the printing platform for printing. After using for a period of time, when the rotating member spreads the powder, there is a deviation from the theoretical spreading position, resulting in a risk of impact. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems in the background art, and provide a powder lifting assembly and a printer.

[0004] To achieve the above purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution 1, a powder lifting assembly, comprising:

[0006] A frame body, which is provided with a material receiving cavity extending along a first direction and adapted to receive three-dimensional printing powder;

[0007] A rotating member, which is rotatably connected to the frame body around a first axis extending along the first direction, and the rotating member is adapted to rotate to a spreading position to lift the powder in the material receiving cavity; the rotating member is adapted to rotate to a positioning position;

[0008] A driving member, which is adapted to drive the rotating member to rotate;

[0009] A force applying assembly, comprising a force applying member and a moving member, the force applying member is fixedly connected to the rotating member, and is provided with a force applying portion corresponding to the positioning position, the force applying portion is adapted to directly or indirectly apply a force to the moving member to make the moving member move, when the rotating member is in the positioning position, the moving member moves to a first position;

[0010] A triggering member, which is adapted to emit a positioning signal when the moving member moves to the first position.

[0011] Solution 2, based on Solution 1, when the moving member is not subjected to the force applied by the force applying portion, it resets to a second position where the triggering member disconnects the positioning signal, and the force applying portion is adapted to rotate to not apply a force to the moving member to allow the moving member to move to the second position.

[0012] Solution 3, based on Solution 2, further includes a sliding member and a biasing member. The sliding member is slidably connected to the frame body between a third position and a fourth position. The sliding member is provided with a collision portion. The force application portion is adapted to abut against the collision portion to slide the sliding member to the third position, and is adapted to move away from the collision portion to allow the sliding member to slide to the fourth position. The two ends of the biasing member respectively act on the sliding member and the frame body to slide the sliding member towards the fourth position.

[0013] The sliding member is adapted to abut against the moving member, and when the sliding member slides to the third position, the moving member is moved to the first position, and when the sliding member slides to the fourth position, the moving member is allowed to move to the second position.

[0014] Solution 4, based on Solution 3, the frame body is provided with a sliding cavity and a through hole communicating with the sliding cavity. The sliding member slides in the sliding cavity, and the collision portion is adapted to extend out of the through hole to cooperate with the force application portion.

[0015] Solution 5, based on Solution 1, the force application portion is adapted to apply a pressing force and a magnetic repulsive force to the moving member to move the moving member.

[0016] Solution 6, based on Solution 1, the triggering member is adapted to be triggered by pressure or light or magnetism to emit a positioning signal.

[0017] Solution 7, based on Solution 1, the rotating member includes a lifting blade. The lifting blade is adapted to lift the powder material. The force application member is provided with a first insertion portion, and the lifting blade is provided with a second insertion portion. The first insertion portion and the second insertion portion are anti-misalignment structures to make the force application portion correspond to the positioning position.

[0018] Solution 8, based on Solution 7, the cross-section of the first insertion portion is a figure that coincides with itself only after rotating 360 degrees.

[0019] Solution 9, based on Solution 1, the rotating member further includes a stirring blade. The rotating member is adapted to rotate 360 degrees in the forward direction and rotate in the reverse direction so that the stirring blade is adapted to stir the powder material in the material receiving cavity, and the stirring blade is inclined relative to the horizontal plane to be adapted to convey the powder material in the material receiving cavity in at least one direction.

[0020] Solution 10, a printer includes a spreading roller, a forming platform, and a powder material lifting assembly as described in any one of Solutions 1 to 9. The spreading roller is adapted to move horizontally relative to the forming platform to push the powder material on the rotating member onto the forming platform.

[0021] As can be seen from the above description of the present utility model and its preferred embodiments, compared with the prior art, the technical solutions of the present utility model and its preferred embodiments have the following beneficial effects due to the following technical means:

[0022] 1. In Solution 1 and its preferred embodiment, a powder lifting assembly includes a frame body, a rotating member, a driving member, a force applying assembly, and a triggering member.

[0023] The frame body is used to carry printing powder and is suitable for installing other components. The frame body is provided with a material receiving cavity extending along a first direction and suitable for receiving three-dimensional printing powder.

[0024] The rotating member is rotatably connected to the frame body around a first axis extending along the first direction. The rotating member is suitable for rotating to a spreading position to lift the powder in the material receiving cavity; the rotating member is suitable for rotating to a positioning position.

[0025] The driving member is suitable for driving the rotating member to rotate.

[0026] The force applying assembly includes a force applying member and a moving member. The force applying member is fixedly connected to the rotating member and is provided with a force applying portion corresponding to the positioning position. The force applying portion is suitable for directly or indirectly applying a force to the moving member to make the moving member move. When the rotating member is in the positioning position, the moving member moves to a first position.

[0027] The triggering member is suitable for emitting a positioning signal when the moving member moves to the first position to achieve positioning, which is beneficial for the subsequent rotating member to accurately reach the spreading position and reduce the risk of collision caused by the cumulative error during the rotation of the rotating member. By utilizing the characteristic that the positioning position of the rotating member can be detected, it is also possible to determine whether the rotating member or the triggering member is installed.

[0028] 2. In Solution 2 and its preferred embodiment, when not under pressure, the moving member resets to a second position where the triggering member disconnects the positioning signal. The force applying portion is suitable for rotating to not apply a force to the moving member to allow the moving member to move to the second position, and the moving member can reset to reposition the rotating member next time.

[0029] 3. In Solution 3 and its preferred embodiment, in this solution, the force applying portion is suitable for indirectly applying a force to the moving member. The powder lifting assembly further includes a sliding member and a biasing member. The sliding member is slidably connected to the frame body between a third position and a fourth position. The sliding member is provided with a collision portion. The force applying portion is suitable for abutting against the collision portion to make the sliding member slide to the third position, and the sliding member is suitable for abutting against the moving member; and when the sliding member slides to the third position, the moving member is made to move to the first position to trigger a signal.

[0030] Both ends of the biasing member act on the sliding member and the frame body respectively to cause the sliding member to slide towards the fourth position. When the force - applying part moves away from the abutting part, the biasing member resets the sliding member to the fourth position; when the sliding member slides to the fourth position, it allows the moving member to move to the second position. Transmission through the sliding member can change the direction of the force or enable the moving member and the force - applying part that are far apart to influence each other, facilitating the spatial design of the product. Moreover, it also prevents the high temperature in the printing environment from affecting the triggering member and extends the service life of the triggering member.

[0031] 4. In Solution Four and its preferred embodiments, the frame body is provided with a sliding cavity, and the sliding member slides within the sliding cavity to facilitate the protection of the sliding member. The frame body is also provided with a through - hole communicating with the sliding cavity, and the abutting part is adapted to extend out from the through - hole to cooperate with the force - applying part, facilitating the transmission of force.

[0032] 5. In Solution Five and its preferred embodiments, the force - applying part is adapted to cause the moving member to move by applying an abutting force and a magnetic repulsive force to the moving member, which is easy to implement.

[0033] 6. In Solution Six and its preferred embodiments, the triggering member is adapted to be triggered by pressure or light or magnetism to emit a positioning signal.

[0034] 7. In Solution Seven and its preferred embodiments, assume that the preset distance between the designed positioning position and the material - laying position is the first distance. If, during installation, the position of the force - applying part changes from the designed position, it will cause the actual positioning position not to match the designed positioning position. After the controller receives the positioning signal and rotates the rotating member by a preset distance, it will not reach the material - laying position. Therefore, the position of the force - applying part needs to be strictly limited for control.

[0035] In this embodiment, the force - applying member is provided with a first insertion part, and the lifting blade is provided with a second insertion part. The first insertion part and the second insertion part are anti - misalignment structures, so that the relative position between the force - applying part and the lifting blade will not change due to installation factors, making the force - applying part correspond to the positioning position, so that when the lifting blade rotates by a preset distance from the positioning position, it can reach the material - laying position or make the positioning position and the material - laying position coincide. Moreover, the anti - misalignment structure also enables the lifting blade and the force - applying member to rotate synchronously, and their relative positions will not change during the working process.

[0036] 8. In Solution Eight and its preferred embodiments, the cross - section of the first insertion part is a figure that coincides with itself only after rotating 360 degrees, thus realizing the anti - misalignment design.

[0037] 9. In the prior art, in Solution Nine and its preferred embodiments, the rotating member usually only swings repeatedly within the powder cavity to stir and lift the powder. Since, when rotating, the part of the rotating member that lifts the powder will push the powder, if there is only repeated swinging, the powder at the edge part of the powder cavity will be difficult to fully participate in the stirring, resulting in uneven stirring.

[0038] In this solution, the rotating member further includes stirring blades. The rotating member is adapted to rotate 360 degrees in the forward direction and rotate in the reverse direction so that the stirring blades are adapted to stir the powder material in the material receiving cavity. In this solution, since the rotating member can rotate 360 degrees in the forward direction, the powder material at the outermost side end (such as the rightmost end) of the powder material cavity can reach the other side end or the middle part of the powder material cavity during the rotation process, enabling the powder material at the outermost side end to fully participate in the stirring, thus there will be no dead angle residue and the efficiency of powder material stirring can be improved. Moreover, the stirring blades are inclined relative to the horizontal plane to be adapted to convey the powder material in the material receiving cavity in at least one direction, and the stirring blades for two-way conveying or one-way conveying can be selected accordingly according to the position of the feeding.

[0039] 10. In Solution Ten and its preferred embodiments, the 3D printer includes a spreading roller, a forming platform, and a powder material lifting assembly. The spreading roller is adapted to move horizontally relative to the forming platform to push the powder material on the rotating member onto the forming platform to achieve printing, and has the beneficial effects brought by the above-mentioned powder material lifting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for description in the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a perspective view of the 3D printer in Embodiment 1;

[0042] Figure 2 It is a perspective view of some parts at the trigger in Embodiment 1;

[0043] Figure 3 It is a top view of some parts at the trigger in Embodiment 1;

[0044] Figure 4 For Figure 3 the sectional view at the marked position;

[0045] Figure 5 It is a perspective view of some parts of the rotating member in Embodiment 1;

[0046] Figure 6 For Figure 5 the enlarged view at the marked position;

[0047] Figure 7 It is a schematic diagram of the rotating member in Embodiment 1 at the positioning position;

[0048] Figure 8 It is a schematic diagram of the second plugging portion in Embodiment 2;

[0049] Figure 9 Schematic diagram of the first plug-in part in the second embodiment.

[0050] Description of the main reference numerals:

[0051] Frame 1; material receiving cavity 11; sliding cavity 12; through hole 13; trigger member 2; moving member 21; rotating member 3; lifting blade 31; second plug-in part 311; stirring blade 32; force applying member 33; first plug-in part 331; force applying part 332; sliding member 4; sliding rod 41; abutting part 42; biasing member 5; Detailed implementation manners

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0053] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are used to distinguish different objects and not to describe a specific order.

[0054] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "longitudinal", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0055] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using terms such as "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrally connected, and being fixedly connected through other devices or elements.

[0056] In the claims, the description and the above-mentioned accompanying drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to "include but not limited to".

[0057] Refer to Figures 1-6, A printer, comprising a material laying roller, a forming platform and a powder lifting assembly.

[0058] The number of powder lifting assemblies is two, and they are symmetrically arranged at both ends of the forming platform.

[0059] The powder lifting assembly includes a frame body 1, a trigger member 2, a rotating member 3, a driving member, a control member, a force applying assembly, a sliding member 4 and a biasing member 5.

[0060] Reference Figure 1 , The frame body 1 is provided with a material receiving cavity 11 extending along a first direction and adapted to receive three-dimensional printing powder. In this embodiment, the first direction is the front-back direction. The material receiving cavity 11 can be communicated with a feeding member so that the feeding member conveys the powder into the material receiving cavity 11. Reference Figure 4 , The frame body 1 is provided with a sliding cavity 12 and a through hole 13 communicating with the sliding cavity 12. Specifically, the through hole 13 communicates with the side cavity wall of the sliding cavity 12.

[0061] The force applying assembly includes a force applying member 33 and a moving member 21. The force applying member 33 is fixedly connected to the rotating member 3, and is provided with a force applying portion 332 corresponding to a positioning position. The force applying portion 332 is adapted to directly or indirectly apply a force to the moving member 21 to make the moving member 21 move. When the rotating member 3 is in the positioning position, the moving member 21 moves to the first position.

[0062] Reference Figure 4 , The moving member 21 is adapted to move to the first position when being pressed and reset to the second position when not being pressed. When the moving member 21 is in the first position, the trigger member 2 emits a positioning signal. When the moving member 21 is in the second position, the trigger member 2 disconnects the positioning signal. The trigger member 2 can be a micro trigger member. The principle of the reset of the moving member 21 can be through the self-reset of the moving member 21, such as the moving member 21 being a spring piece, or through an elastic member to make the moving member 21 reset for the next detection.

[0063] Reference Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 , The rotating member 3 is rotatably connected to the frame body 1 about a first axis extending along the first direction to lift the powder, and is adapted to rotate to a positioning position and a material laying position. When the moving member 21 is in the first position, the rotating member 3 is in the positioning position; after the rotating member 3 rotates a preset distance from the positioning position, it will stop at the material laying position. When the rotating member 3 is in the material laying position, the material laying roller can push the powder on the rotating member 3 onto the forming platform.

[0064] Reference Figure 3 、 Figure 5 、 Figure 6, the rotating member 3 includes a lifting blade 31, a stirring blade 32 and a force applying member 33. The rotating member 3 is adapted to rotate 360 degrees in the forward direction and rotate in the reverse direction so that the stirring blade 32 is adapted to stir the powder in the material receiving cavity 11, and the stirring blade 32 is inclined relative to the horizontal plane to be adapted to convey the powder in the material receiving cavity 11 in at least one direction; the lifting blade 31 is adapted to lift the powder and is located at the paving position. In this embodiment, the force applying member 33 is generally in the shape of a cam. In other embodiments, it may also be a cylinder with a center line deviated from the first axis. The force applying member 33 is provided with a radially protruding force applying portion 332, and the force applying portion 332 is adapted to directly or indirectly apply a force to the moving member 21 to make the moving member 21 move.

[0065] The force applying member 33 is detachably fixed to the lifting blade 31 for ease of production and manufacturing. Specifically, referring to Figure 2 , Figure 3 and Figure 6 , in this solution, a plug-in structure is adopted to realize the assembly of the two. The force applying member 33 is provided with a first plug-in portion 331, and the lifting blade 31 is provided with a second plug-in portion 311. The first plug-in portion 331 and the second plug-in portion 311 are anti-fooling structures. Through anti-fooling design, the relative positions of the force applying member 33 and the lifting blade 31 are determined, so that when the force applying portion 332 of the force applying member 33 triggers the trigger member 2, that is, when the lifting blade 31 is located at the positioning position, this positioning position is the same as the designed position, so that when the lifting blade 31 rotates a preset distance from the positioning position, it can reach the paving position. The cross-section of the first plug-in portion 331 is a figure that coincides with itself only after rotating 360 degrees. The following specifically describes two anti-fooling designs:

[0066] Referring to Figure 2 , Figure 6 , the first one is: the first plug-in portion 331 includes a first cylinder and a second cylinder protruding radially. The diameters of the first cylinder and the second cylinder are different, and the second plug-in portion 311 is provided with slots adapted to the first cylinder and the second cylinder;

[0067] Referring to Figure 8 , Figure 9 , the second one is: the first plug-in portion 331 is a cylinder with a cut-off corner, and the second plug-in portion 311 is provided with a slot adapted to the cylinder;

[0068] In addition to the above, it may also be other shapes of anti-fooling structures, which will not be elaborated one by one here.

[0069] In this embodiment, the force applying portion 332 indirectly applies a force to the moving member 21 to make the moving member 21 move. Indirect force application means that there is a transmission member between the force applying portion 332 and the moving member 21, and direct force application means that there is no transmission member between the force applying portion 332 and the moving member 21. In this embodiment, the transmission member is a sliding member 4, and in other embodiments, it may also be a gear or the like.

[0070] The sliding member 4 is slidably connected to the frame body 1 between the third position and the fourth position. The sliding member 4 is provided with a slide rod 41 and a collision portion 42 connected to the slide rod 41. The collision portion 42 protrudes along the radial direction of the slide rod 41, and the slide rod 41 and the collision portion 42 are detachably connected. The slide rod 41 slides within the sliding cavity 12, and the collision portion 42 is adapted to extend out through the through hole 13 to cooperate with the force application portion 332. Among them, the portion where the force application portion 332 and the collision portion 42 are in contact is an inclined surface or an arc surface, which is more conducive to transmitting force. Specifically, the force application portion 332 is adapted to abut against the collision portion 42 to slide the sliding member 4 to the third position; when the force application portion 332 is adapted to move away from the collision portion 42, that is, when the force application portion 332 rotates to a position not corresponding to the moving member 21, at this time, other parts of the force application member 33 will not press against the moving member 21 to allow the sliding member 4 to slide to the fourth position;

[0071] Both ends of the biasing member 5 act on the sliding member 4 and the sliding cavity 12 of the frame body 1 respectively to slide the sliding member 4 towards the fourth position; under the action of the biasing member 5, the collision portion 42 abuts against the cavity wall of the sliding cavity 12 or, in other embodiments, the collision portion 42 abuts against the hole wall on the side of the through hole 13 away from the triggering member 2, so that the sliding member 4 is located at the fourth position. The biasing member 5 can be a spring or mutually exclusive magnets, etc., to provide a reset force for the sliding member 4.

[0072] The slide rod 41 is adapted to abut against the moving member 21 and move the moving member 21 to the first position when the sliding member 4 slides to the third position, and release the moving member 21 when the sliding member 4 slides to the fourth position to allow the moving member 21 to move to the second position.

[0073] The driving member is adapted to drive the rotating member 3 to rotate, and it can be a rotating motor.

[0074] The control member communicates with the triggering member 2 and the driving member. The communication method can be wireless or directly realized through wires. The control member is adapted to control the driving member to work, and when detecting a positioning signal (equivalent to the rotating member 3 being at the zero point), control the driving member to rotate the rotating member 3 a preset distance from the positioning position and then dock at the material spreading position to ensure the reliability of the moving position. In this embodiment, when the rotating member 3 is at the positioning position, it rotates counterclockwise to the material spreading position. Of course, in other embodiments, it can also rotate clockwise to the material spreading position.

[0075] The material spreading roller is adapted to push the powder on the lifting blade 31 to the forming platform when the lifting blade 31 of the rotating member 3 is at the material spreading position, and push the excess powder into the receiving cavity 11 of another powder lifting assembly;

[0076] The forming platform is adapted to move relative to the powder lifting assembly in the vertical direction to descend after printing one layer of powder, so as to gradually realize powder spreading and printing.

[0077] During operation: Refer toFigure 4 , when the force - applying part 332 of the rotating part 3 is about to contact the abutting part 42, the sliding rod 41 is at the fourth position at this time, the moving part 21 of the triggering part 2 is at the second position, and the triggering part 2 does not send out a positioning signal;

[0078] Reference Figure 7 , when the driving part drives the rotating part 3 to continue rotating, the force - applying part 332 contacts the abutting part 42, causing the sliding rod 41 to slide towards the third position. The bottom end of the sliding rod 41 presses the moving part 21, causing the moving part 21 to move towards the first position until it reaches the first position. The triggering part 2 sends out a positioning signal, which is regarded as the rotating part 3 being in the positioning position. At this time, the controller receives the positioning signal and controls the driving part to drive the rotating part 3 to rotate (the direction of this rotation can be either clockwise or counter - clockwise) a preset distance to reach the material - spreading position.

[0079] If the driving part drives the rotating part 3 to rotate one circle and the controller does not receive the positioning signal, it is regarded as the rotating part 3, the sliding rod 41, or the triggering part 2 not being installed.

[0080] Compared with the prior art, the present embodiment has the following beneficial effects:

[0081] In an exemplary embodiment, a powder - lifting assembly includes a frame body, a rotating part, a driving part, a force - applying assembly, and a triggering part. The frame body is used for carrying printing powder and is suitable for installing other components. The frame body is provided with a material - receiving cavity extending along the first direction and suitable for receiving three - dimensional printing powder;

[0082] The rotating part is rotatably connected to the frame body around a first axis extending along the first direction. The rotating part is suitable for rotating to the material - spreading position to lift the powder in the material - receiving cavity; the rotating part is suitable for rotating to the positioning position;

[0083] The driving part is suitable for driving the rotating part to rotate;

[0084] The force - applying assembly includes a force - applying part and a moving part. The force - applying part is coaxially arranged with the rotating part and is provided with a force - applying part corresponding to the positioning position. The force - applying part is suitable for directly or indirectly applying force to the moving part to make the moving part move. When the rotating part is in the positioning position, the moving part moves to the first position;

[0085] The triggering part is suitable for sending out a positioning signal when the moving part moves to the first position to achieve positioning, which is beneficial for the subsequent rotating part to accurately reach the material - spreading position and reduce the risk of crashing due to the cumulative error during the rotation of the rotating part. By using the characteristic that the positioning position of the rotating part can be detected, it is also possible to judge whether the rotating part or the triggering part is installed.

[0086] In an exemplary embodiment, when not under pressure, the moving member 21 resets to a second position where the triggering member 2 disconnects the positioning signal. The force applying portion 332 is adapted to rotate to not apply a force to the moving member 21 to allow the moving member 21 to move to the second position. The moving member 21 can be reset to reposition the rotating member 3 next time.

[0087] In an exemplary embodiment, the force applying portion 332 is adapted to indirectly apply a force to the moving member 21. The powder lifting assembly further includes a sliding member 4 and a biasing member 5. The sliding member 4 is slidably connected to the frame body 1 between a third position and a fourth position. The sliding member 4 is provided with an abutting portion 42. The force applying portion 332 is adapted to abut against the abutting portion 42 to slide the sliding member 4 to the third position, and the sliding member 4 is adapted to abut against the moving member 21; and when the sliding member 4 slides to the third position, the moving member 21 is moved to the first position to trigger a signal.

[0088] Both ends of the biasing member 5 act on the sliding member 4 and the frame body 1 respectively to slide the sliding member 4 towards the fourth position. When the force applying portion 332 moves away from the abutting portion 42, the biasing member 5 resets the sliding member 4 to the fourth position; when the sliding member 4 slides to the fourth position, the moving member 21 is allowed to move to the second position. Transmission through the sliding member 4 can change the direction of the force or enable the relatively distant moving member 21 and the force applying portion 332 to influence each other, facilitating the spatial design of the product. Also, it prevents the high temperature in the printing environment from affecting the triggering member 2 and extends the service life of the triggering member 2.

[0089] In an exemplary embodiment, the frame body 1 is provided with a sliding cavity 12. The sliding member 4 slides within the sliding cavity 12 to facilitate protection of the sliding member 4. The frame body 1 is further provided with a through hole 13 communicating with the sliding cavity 12, and the abutting portion 42 is adapted to extend out from the through hole 13 to cooperate with the force applying portion 332 for facilitating force transmission; the triggering member 2 is located within the sliding cavity 12 to prevent dust and the high temperature in the working environment from affecting the triggering member 2.

[0090] In an exemplary embodiment, when the abutting portion 42 abuts against the hole wall on the side of the through hole 13 away from the triggering member 2, the sliding member 4 is located at the fourth position to limit the position of the sliding member 4 so that the abutting portion 42 can be pressed by the force applying portion 332.

[0091] In an exemplary embodiment, the rotating member 3 includes a lifting blade 31 and a force applying member 33. The lifting blade 31 is adapted to lift the powder and is located at the spreading position; the force applying member 33 is provided with a force applying portion 332, and the force applying member 33 is detachably fixed to the lifting blade 31 for facilitating processing and manufacturing.

[0092] In an exemplary embodiment, the force application member 33 is provided with a first insertion portion 331, and the lifting blade 31 is provided with a second insertion portion 311. The first insertion portion 331 and the second insertion portion 311 are anti-fooling structures, so that the relative position between the force application portion 332 and the lifting blade 31 will not be changed due to installation factors, so that when the lifting blade 31 rotates a preset distance from the positioning position, it can reach the material laying position. Moreover, the anti-fooling structure also enables the lifting blade 31 and the force application member 33 to rotate synchronously, and during the working process, the relative position between the two will not change.

[0093] In an exemplary embodiment, the rotating member 3 further includes a stirring blade 32. The rotating member 3 is adapted to rotate 360 degrees in the forward direction and rotate in the reverse direction so that the stirring blade 32 is adapted to stir the powder in the material receiving cavity 11. In this solution, since the rotating member 3 can rotate 360 degrees in the forward direction, the powder at the outermost side end (for example, the rightmost end) of the powder cavity can reach the other side end or the middle of the powder cavity during the rotation process, so that the powder at the outermost side end can fully participate in the stirring, and there will be no dead angle residue, which can improve the efficiency of powder stirring. And the stirring blade 32 is inclined relative to the horizontal plane to be adapted to convey the powder in the material receiving cavity 11 in at least one direction, and the stirring blade 32 for two-way conveying or one-way conveying can be selected accordingly according to the position of the feeding.

[0094] In other embodiments, the force application portion 332 is adapted to make the moving member 21 move by applying a pressing force and a magnetic repulsive force to the moving member 21. In addition to the above forms, the pressing force can also be realized by means of an intermittent meshing transmission of a sector gear, so as to make the moving member 21 move.

[0095] In the above embodiment, the trigger member 2 is triggered by pressure. In other embodiments, the trigger member 2 emits a positioning signal in the form of light trigger or magnetic trigger.

[0096] Embodiment 2 is different from Embodiment 1 in that there is an interval between the positioning position and the material laying position in Embodiment 1, while in this embodiment, when the rotating member 3 is in the positioning position, the rotating member 3 is also located at the material laying position at the same time (that is, the material laying position and the positioning position coincide with each other).

[0097] Specifically, a powder lifting assembly includes a frame 1, a trigger 2, a rotating member 3, a driving member, and a control member. The frame 1 is provided with a material receiving cavity 11 extending along a first direction and adapted to receive three-dimensional printing powder. The trigger 2 is provided with a moving member 21, and the moving member 21 is adapted to move to a first position where the trigger 2 emits a positioning signal when being pressed. The rotating member 3 is rotatably connected to the frame 1 about a first axis extending along the first direction to lift the powder. It is adapted to rotate to a positioning position and is provided with a radially protruding force applying portion 332. The force applying portion 332 is adapted to directly or indirectly apply a force to the moving member 21 to move the moving member 21. When the rotating member 3 is in the positioning position, the moving member 21 is in the first position. The driving member is adapted to drive the rotating member 3 to rotate. The control member communicates with the trigger 2 and the driving member, and is adapted to control the driving member to work and stop the driving member from working when detecting the positioning signal.

[0098] The printer corresponding to this powder lifting assembly has the same working principle as that in the first embodiment. In this embodiment, a sliding member 4 as described in the first embodiment can also be added. The rotating member 3 can also include a force applying member 33 and a lifting blade 31, and the force applying member 33 and the lifting blade 31 are inserted through an anti-fooling structure so that the positioning position and the powder spreading position of the rotating member 3 coincide.

[0099] In the above two embodiments, positioning and powder spreading are consecutive actions. In other embodiments, they can be carried out separately. For example, the positioning step is executed before printing or during the printing gap. After positioning is completed, it is not required to immediately execute the step of making the rotating member 3 in the powder spreading position. The rotating member 3 can stop rotating or continue to rotate for stirring. When a powder spreading instruction is received, the rotating member 3 is rotated to the powder spreading position. When the initial position after receiving the powder spreading instruction is not the positioning position, the angle from the initial position to the powder spreading position can also be calculated through the angular difference between the initial position and the positioning position.

[0100] The descriptions of the above specification and embodiments are used to explain the protection scope of the present invention, but do not constitute a limitation to the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combined with common general knowledge, ordinary technical knowledge in this field, and / or existing technologies, can obtain modifications, equivalent replacements, or other improvements to the embodiments of the present invention or some of its technical features through logical analysis, reasoning, or limited experiments, which should all be included within the protection scope of the present invention.

Claims

1. A powder lifting assembly, characterized in that: include: A frame (1) is provided with a material receiving cavity (11) extending along a first direction and suitable for receiving three-dimensional printing powder; A rotating member (3) is rotatably connected to the frame (1) around a first axis extending in a first direction, the rotating member (3) being adapted to rotate to a material spreading position to lift the powder in the material receiving chamber (11); the rotating member (3) being adapted to rotate to a positioning position; A driving member, which is suitable for driving the rotating member (3) to rotate; A force-applying assembly, comprising a force-applying member (33) and a moving member (21), wherein the force-applying member (33) is fixedly connected to the rotating member (3), and is provided with a force-applying portion (332) corresponding to the positioning position, wherein the force-applying portion (332) is suitable for directly or indirectly applying force to the moving member (21) to move the moving member (21), and when the rotating member (3) is located at the positioning position, the moving member (21) moves to a first position; A trigger member (2) is adapted to send a positioning signal when the moving member (21) moves to a first position.

2. A powder lifting assembly as claimed in claim 1, characterized in that When not being subjected to force by the force-applying portion (332), the moving member (21) is reset to a second position causing the trigger member (2) to disconnect the positioning signal, and the force-applying portion (332) is adapted to rotate until no force is applied to the moving member (21) to allow the moving member (21) to move to the second position.

3. A powder lifting assembly as claimed in claim 2, characterized in that: The invention also comprises a sliding member (4) and a biasing member (5), wherein the sliding member (4) is slidably connected to the frame (1) between a third position and a fourth position, the sliding member (4) is provided with a contact portion (42), the force-applying portion (332) is adapted to contact the contact portion (42) to enable the sliding member (4) to slide to the third position, and is adapted to move away from the contact portion (42) to allow the sliding member (4) to slide to the fourth position; the two ends of the biasing member (5) act on the sliding member (4) and the frame (1) respectively to enable the sliding member (4) to slide to the fourth position; The sliding member (4) is suitable for abutting against the moving member (21) and causing the moving member (21) to move to the first position when the sliding member (4) slides to the third position, and allowing the moving member (21) to move to the second position when the sliding member (4) slides to the fourth position.

4. A powder lifting assembly as claimed in claim 3, characterized in that: The frame (1) is provided with a sliding cavity (12) and a through hole (13) connected to the sliding cavity (12); the sliding member (4) slides in the sliding cavity (12), and the abutment portion (42) is suitable for extending from the through hole (13) to cooperate with the force-applying portion (332).

5. A powder lifting assembly as claimed in claim 1, characterized in that: The force applying portion (332) is suitable for applying a resisting force and a magnetic repulsive force to the moving part (21) to move the moving part (21).

6. A powder lifting assembly as claimed in claim 1, characterized in that: The triggering member (2) is suitable for being pressure-triggered, light-triggered or magnetically triggered to send out a positioning signal.

7. A powder lifting assembly according to claim 1, characterized in that: The rotating member (3) comprises a lifting blade (31), and the lifting blade (31) is suitable for lifting powder; the force-applying member (33) is provided with a first plug-in portion (331), and the lifting blade (31) is provided with a second plug-in portion (311), and the first plug-in portion (331) and the second plug-in portion (311) are fool-proof structures so that the force-applying portion (332) corresponds to the positioning position.

8. A powder lifting assembly as claimed in claim 7, characterized in that: The cross section of the first plug-in portion (331) is a figure that overlaps with itself only after being rotated 360 degrees.

9. A powder lifting assembly as claimed in claim 1, characterized in that: The rotating member (3) further comprises a stirring blade (32), wherein the rotating member (3) is suitable for rotating 360 degrees in a forward direction and rotating in a reverse direction so that the stirring blade (32) is suitable for stirring the powder in the receiving cavity (11), and the stirring blade (32) is inclined relative to a horizontal plane so as to be suitable for conveying the powder in the receiving cavity (11) in at least one direction.

10. A printer, characterized in that: It comprises a spreading roller, a forming platform and a powder lifting assembly as described in any one of claims 1 to 9, wherein the spreading roller is suitable for moving in a horizontal direction relative to the forming platform to push the powder on the rotating member (3) onto the forming platform.

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