Quantitative powder ink supply set

Abstract

The invention relates to the technical field related to 3D printing, and discloses a quantitative powder ink supply set which comprises a powder bin and a quantitative part. The transmission part is arranged on the quantifying part and is used for power transmission and energy storage of the quantifying part so as to synchronously drive the paving part and intermittently drive the shifting part; therefore, the powder is subjected to separate paving treatment and intermittent stirring, concentrated accumulation of the powder is avoided, the risk of powder caking or condensation is reduced, powder fluidity is kept, the amount of powder which cannot be used due to local accumulation and powder property change caused by local accumulation are reduced, and the powder quality is improved. Meanwhile, the problem that a falling dead zone is formed due to the fact that the powder is difficult to fall due to factors such as friction force and cohesive force among powder particles is solved, the phenomena of fluctuation and non-uniformity of the powder amount in the powder supply process are reduced, quantitative powder supply is achieved, and in addition, the residual powder amount is estimated more accurately due to the evenly-laid powder surface; and powder can be supplemented in time.

Description

Technical Field

[0001] The present invention relates to the technical field related to 3D printing, and in particular to a quantitative powder and ink supply group. Background Art

[0002] In 3D printing, powder-ink combination usually refers to a 3D printing system that uses powder materials (such as plastic powder, metal powder, etc.), where "powder" refers to these powder materials, and "ink" refers to the process of stacking these powders layer by layer through the print head. This printing method is different from traditional filament (such as PLA, ABS, etc.) 3D printers, which achieve the layer-by-layer effect by melting or sintering powder materials.

[0003] In existing 3D printing, powder is directly put into the powder bin, and then the quantitative powder supply process is carried out under the action of the quantitative unit. However, when powder is concentrated in the powder bin, it is easy for the powder to accumulate together. The concentrated accumulation of powder is prone to powder agglomeration, excessive air inclusion, local accumulation and unusable powder quantity problems, and the falling obstacle problem caused by the friction and cohesion between the powder particles after the powder is concentrated. The above problems may cause fluctuations and unevenness of the powder amount during the powder supply process, resulting in insufficient powder supply and failure to achieve the purpose of quantitative powder supply. Summary of the invention

[0004] The present invention provides a quantitative powder supply ink group to solve the problem that in the existing 3D printing, powder is directly put into a powder bin, and then a quantitative powder supply process is performed under the action of a quantitative unit. However, when powder is put into the powder bin, it is easy for the powder to be concentrated and piled up. When the powder is concentrated and piled up, it is easy for the powder to agglomerate, there are too many air inclusions, local accumulation and the problem of unusable powder quantity. After the powder is concentrated and piled up, the friction and cohesion between the powder particles cause the powder to fall due to the falling obstacle. All of the above problems may cause the powder amount to fluctuate and be uneven during the powder supply process, resulting in insufficient powder supply and the failure to achieve the purpose of quantitative powder supply.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] An embodiment of the present invention provides a quantitative powder and ink supply set, comprising a powder bin and a quantitative portion for quantitatively supplying powder; and further comprising:

[0007] A moving part, arranged on the quantitative part, for intermittently moving the powder above the quantitative part;

[0008] A spreading part is arranged on the powder bin and above the quantitative part, and is used for reciprocatingly spreading the added powder; and

[0009] The transmission part is arranged on the quantitative part and is used for power transmission and energy storage of the quantitative part to synchronously drive the spreading part and the intermittently drive the shifting part;

[0010] When the quantitative part and the powder are in an isolated state and the quantitative part is in a dynamic partial powder dropping state, the quantitative part is in a state of exerting a force on the transmission part with an interaction force, and the transmission part is in a state of synchronously driving the spreading part to spread the powder and in an energy storage state;

[0011] When the quantitative part is in a static quantitative powder taking state, the quantitative part is in a state of no interaction force with the transmission part, and the transmission part is in a state of driving the spreading part to spread the powder in the reverse direction and driving the moving part to move the powder to drop the powder;

[0012] When the quantitative part is in the powder conveying state, the quantitative part is in a state of no interaction force with the transmission part, and the spreading part and the shifting part are in a static state;

[0013] When the quantitative part presents the initial powder delivery state, the quantitative part presents the secondary dynamic local powder falling state synchronously;

[0014] Wherein, the transmission part is located on the side of the return journey after the quantitative part completes the powder delivery.

[0015] Furthermore, a powder inlet bin is fixedly arranged on the outer side of the powder bin opposite to the powder inlet.

[0016] Furthermore, the bottom inner wall of the powder inlet bin is an inclined surface with the bottom end facing the powder bin.

[0017] Further, the quantitative unit includes:

[0018] The quantitative installation block is fixedly arranged in the powder bin;

[0019] The quantitative installation groove is opened in the middle of the quantitative installation block, and the top and bottom are both open;

[0020] A quantitative rotating shaft with a damping rotation is arranged on the powder bin, and one end thereof penetrates and rotates on the side wall of the powder bin;

[0021] A quantitative conveying roller is fixedly arranged on the quantitative rotating shaft;

[0022] A quantitative groove is symmetrically arranged on the quantitative conveying roller; and

[0023] A quantitative driving mechanism, arranged on the outer wall of the powder bin, for driving the quantitative rotating shaft;

[0024] Among them, the quantitative installation groove, the quantitative rotating shaft and the quantitative conveying roller are arranged coaxially, the sum of the arc lengths corresponding to the quantitative groove is greater than half the circumference of the quantitative conveying roller, and the open end at the bottom of the quantitative installation groove is connected to the powder outlet.

[0025] Furthermore, the outer wall of the powder bin is provided with a mounting cover, and the quantitative driving mechanism includes:

[0026] A driving motor is fixedly arranged on the outer wall of the powder bin;

[0027] A driving shaft, one end of which is rotatably disposed on the mounting cover, and the other end of which is detachably connected to the output shaft of the driving motor;

[0028] An incomplete drive gear is fixedly disposed on the drive shaft; and

[0029] A driven gear is fixedly arranged on the quantitative rotating shaft and is intermittently meshed with the incomplete driving gear;

[0030] When the incomplete driving gear and the driven gear are in a meshing state, the quantitative groove is in a dynamic partial powder falling state or the quantitative conveying roller is in a powder conveying state; when the incomplete driving gear and the driven gear are in a non-meshing state, the quantitative conveying roller drives the quantitative groove on one side to be in an upward static quantitative powder taking state, and the quantitative groove on the other side is in a complete powder delivery state.

[0031] Furthermore, an installation avoidance groove is provided in the quantitative installation block, a first support is fixedly provided on the inner wall at the bottom of the installation avoidance groove, a transmission avoidance groove is provided on the quantitative installation block, and the transmission part includes:

[0032] A transmission shaft is rotatably arranged on the installation avoidance groove;

[0033] The transmission wheel is fixedly arranged on the transmission shaft and interacts with the quantitative conveying roller intermittently;

[0034] Energy storage springs, at least one set, one end of which is fixedly mounted on the transmission shaft, and the other end of which is fixedly mounted on the inner wall of the installation avoidance groove; and

[0035] A transmission driven shaft, one end of which is rotatably disposed on the first support, and the other end of which penetrates and rotates on the side wall of the powder bin;

[0036] Among them, the transmission shaft and the transmission driven shaft are connected via a first transmission member, the transmission driven shaft and the spreading part are connected via a second transmission member, the transmission driven shaft and the shifting part are connected via an intermittent transmission mechanism, and the transmission wheel overflows the surface of the quantitative installation groove.

[0037] Furthermore, a spreading installation bracket is provided on the top of the powder bin, and the inner walls on both sides of the powder bin are semicircular, and a spreading avoidance groove is provided in the middle of the top of the powder bin. The spreading part includes:

[0038] A paving shaft is rotatably arranged on the paving mounting bracket, and one end of the paving shaft passes through the paving mounting bracket;

[0039] A paving driving plate is slidably arranged on the paving mounting bracket;

[0040] The guide blocks are arranged in two groups, respectively located in the middle of the paving avoidance groove and the end of the paving avoidance groove close to the driven transmission shaft, and both are slidably arranged in the paving avoidance groove;

[0041] The driving shafts are laid out in a one-to-one correspondence with the guide blocks;

[0042] The spreading rack plate is fixed on the top of the powder bin;

[0043] The paving gear meshes with the paving rack plate and corresponds one-to-one with the paving drive shaft; and

[0044] The paving plate corresponds to the paving drive shaft one by one and is fixedly arranged at the end of the paving drive shaft;

[0045] Among them, the spreading shaft is connected to the driven transmission shaft through the second transmission member, the spreading shaft and the spreading drive plate are connected through a gear rack pair, the spreading drive shaft is rotatably set on the spreading drive plate and the guide block, the spreading gear is fixed on the spreading drive shaft, the length of the spreading plate perpendicular to the spreading drive shaft is matched with the inner wall width of the powder bin, and the spacing between adjacent spreading plates is greater than half of the sum of the lengths of the spreading plates.

[0046] Furthermore, a plurality of hollow grooves are provided on the paving plate.

[0047] Furthermore, a second support is fixedly arranged on the inner wall at the bottom of the installation avoidance groove, a supporting partition is fixedly arranged on the installation avoidance groove, and the toggle portion includes:

[0048] A toggle plate, one end of which is swingably arranged in the powder bin and located on the top of the quantitative mounting block;

[0049] The rotating shaft is turned to rotate on the second support and the installation avoidance groove;

[0050] The toggle protrusion column is fixedly arranged on the toggle rotating shaft, and the outer surface thereof is uneven;

[0051] A toggle lever, at least one set, slidably disposed on the supporting partition; and

[0052] The reset mechanism corresponds to the toggle rod one by one and is arranged between the toggle rod and the supporting partition;

[0053] Among them, the toggle shaft and the driven transmission shaft are connected through an intermittent transmission mechanism, the toggle shaft and the driven transmission shaft are coaxially arranged, the lower end of the toggle rod is always in contact with the surface of the toggle protrusion column, the upper end of the toggle rod passes through the quantitative mounting block and is always in contact with the bottom of the toggle plate, a number of powder passing grooves are evenly arranged on the toggle plate directly above the quantitative conveying roller, and the distance between the bottom of the spreading plate and the toggle plate is greater than the maximum displacement generated by the toggle protrusion column driving the toggle rod.

[0054] Furthermore, the reset mechanism comprises:

[0055] A reset plate, fixedly disposed on the toggle rod; and

[0056] The reset spring is sleeved on the toggle rod, and the two ends are respectively connected to the reset plate and the supporting partition plate.

[0057] The above solution of the present invention includes at least the following beneficial effects:

[0058] The present invention is provided with a toggle part, a spreading part and a transmission part. When the quantitative part and the powder are in a dynamic local powder falling state, the quantitative part is in a force application state with an interaction force on the transmission part. At this time, the transmission part is in a state of synchronously driving the spreading part to spread the added powder and an energy storage state. In the process of spreading the powder, the problem of concentrated accumulation of powder is avoided while the powder falling is synchronously promoted; when the quantitative part is in a static quantitative powder taking state, at this time, the quantitative part is in a state of no interaction force on the transmission part, and the energy stored in the transmission part is released to drive the spreading part to spread the powder in the reverse direction and drive the toggle part to toggle the powder and drop the powder. The reverse spreading of the powder by the spreading part can effectively spread the powder in the powder bin in a timely and uniform manner while promoting the fluidity of the powder. The toggle part's toggle powder dropping can further promote the powder fluidity to improve the powder taking effect of the quantitative part. After the quantitative part completes static powder taking, the quantitative part carries out powder transportation. At this time, the quantitative part is in a state of no interaction force on the transmission part, and the spreading part and the toggle part are both in a In a static state; when the quantitative part presents the initial powder delivery state, the quantitative part synchronously presents the secondary dynamic local powder falling state, at this time, the quantitative part is in a state of applying force to the transmission part with an interactive force, and the transmission part is in a state of synchronously driving the spreading part to spread the added powder and an energy storage state, so as to achieve the purpose of spreading the powder, intermittent stirring and quantitative powder supply in a cycle, thereby avoiding concentrated accumulation of powder to reduce the risk of powder agglomeration or coagulation, maintaining powder fluidity, reducing the amount of powder that cannot be used due to local accumulation and changes in powder properties caused by local accumulation, and avoiding the problem of powder being difficult to fall due to factors such as friction and cohesion between powder particles to form a falling dead zone, thereby reducing powder fluctuations and unevenness during the powder supply process to achieve quantitative powder supply, in addition, the evenly spread powder surface makes the estimation of the remaining powder amount more accurate, which is conducive to timely replenishment of powder, and the flat powder surface reduces the air gap in the powder, improves the consistency of powder quality to ensure the effect of 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A schematic diagram of the overall three-dimensional structure of a quantitative powder and ink supply group provided in an embodiment of the present invention;

[0060] Figure 2 This is a schematic diagram of the three-dimensional structure of the interior of the installation cover in an embodiment of the present invention;

[0061] Figure 3 It is a schematic diagram of the three-dimensional structure of the combination of the transmission part, the spreading part and the toggle part in the embodiment of the present invention;

[0062] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the three-dimensional structure at A in the middle;

[0063] Figure 5 The embodiment of the present invention provides Figure 3 Schematic diagram of the three-dimensional structure at B in the middle;

[0064] Figure 6 It is a schematic diagram of the three-dimensional structure of the combination of the quantitative conveying roller and the quantitative mounting block in the embodiment of the present invention;

[0065] Figure 7 It is a schematic diagram of a partial three-dimensional structure of a toggle part in an embodiment of the present invention;

[0066] Figure 8 It is a schematic diagram of the three-dimensional structure of the split-laying board in an embodiment of the present invention;

[0067] Fig. 9 It is a schematic diagram of the three-dimensional structure of the toggle plate in the embodiment of the present invention.

[0068] Description of reference numerals:

[0069] In the figure: 1, powder bin; 2, powder outlet; 3, powder bin inlet; 4, ratchet; 5, quantitative installation block; 6, quantitative installation slot; 7, quantitative conveying roller; 8, quantitative rotating shaft; 9, quantitative slot; 10, installation cover; 11, intermittent avoidance slot; 12, driving shaft; 13, incomplete driving gear; 14, driven gear; 15, installation avoidance slot; 16, first support; 17, second support; 18, transmission shaft; 19, transmission wheel; 20, energy storage spring; 21, transmission driven gear Spinning shaft; 22. Spreading installation bracket; 23. Transmission avoidance groove; 24. Spreading avoidance groove; 25. Spreading shaft; 26. Spreading drive plate; 27. Guide block; 28. Spreading drive shaft; 29. ​​Spreading rack plate; 30. Spreading gear; 31. Spreading plate; 32. Hollow groove; 33. Support partition; 34. Toggle shaft; 35. Toggle plate; 36. Toggle raised column; 37. Toggle rod; 38. Powder passing groove; 39. Reset plate; 40. Reset spring; 41. Ratchet. DETAILED DESCRIPTION

[0070] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0071] like Figures 1 to 9 As shown, an embodiment of the present invention provides a quantitative powder and ink supply set, including a powder bin 1 and a quantitative portion for quantitatively providing powder; and further comprising:

[0072] The moving part is arranged on the quantitative part, and is used to intermittently move the powder above the quantitative part to avoid the problem of insufficient powder supply caused by the falling obstacle caused by the friction and cohesion between the powder particles;

[0073] A spreading part is arranged on the powder bin 1 and above the quantitative part, and is used for spreading the added powder back and forth to avoid the problem of the powder being concentrated in one place and reducing the fluidity of the powder; and

[0074] The transmission part is arranged on the quantitative part and is used for power transmission and energy storage of the quantitative part to synchronously drive the spreading part and the intermittently drive the shifting part;

[0075] When the quantitative part and the powder are in an isolated state and the quantitative part is in a dynamic partial powder dropping state, the quantitative part is in a state of exerting a force on the transmission part with an interaction force, and the transmission part is in a state of synchronously driving the spreading part to spread the powder and in an energy storage state;

[0076] When the quantitative part is in a static quantitative powder taking state, the quantitative part is in a state of no interaction force with the transmission part, and the transmission part is in a state of driving the spreading part to spread the powder in the reverse direction and driving the moving part to move the powder to drop the powder;

[0077] When the quantitative part is in the powder conveying state, the quantitative part is in a state of no interaction force with the transmission part, and the spreading part and the shifting part are in a static state;

[0078] When the quantitative portion presents the initial powder delivery state, the quantitative portion simultaneously presents the secondary dynamic local powder falling state.

[0079] The quantitative part is located in the middle of the powder bin 1, a powder outlet 2 for discharging powder is provided at the bottom of the powder bin 1, the powder outlet 2 is located directly below the quantitative part, and the transmission part is located on the return side of the quantitative part after completing powder delivery.

[0080] Furthermore, a powder inlet for adding powder is provided on the side of the powder bin 1 .

[0081] Furthermore, in order to provide stability and guidance when adding powder, a powder inlet bin 3 is fixedly arranged on the outer side of the powder bin 1 opposite to the powder inlet.

[0082] Furthermore, in order to prevent the powder from being retained in the powder inlet bin 3 , the bottom inner wall of the powder inlet bin 3 is an inclined surface with the bottom end facing the powder bin 1 .

[0083] In the actual application process of this embodiment, the powder is added to the powder bin 1 through the powder inlet bin 3. At this time, the quantitative part and the powder are in an isolated state, and the quantitative part is in an initial contact state with the transmission part. When the 3D printing quantitative powder supply is started, the quantitative part is started, and the quantitative part and the powder are in a dynamic local powder falling state. The quantitative part is in a force application state with an interaction force on the transmission part. At this time, the transmission part is in a state of synchronously driving the spreading part to spread the added powder and an energy storage state. In the process of spreading the powder, the problem of concentrated accumulation of powder is avoided while the powder is simultaneously promoted to fall; when the quantitative part is in a static quantitative powder taking state, at this time, the quantitative part is in a state of no interaction force with the transmission part, and the energy stored in the transmission part is released to drive the spreading part to spread the powder in the reverse direction and drive the toggling part to toggle the powder to drop the powder. The reverse spreading of the powder by the spreading part can effectively spread the powder in the powder bin 1 in a timely and uniform manner while promoting the fluidity of the powder. The toggling part to toggle the powder to drop the powder can further promote the powder fluidity to improve The powder taking effect of the high quantitative part; after the quantitative part completes the static powder taking, the quantitative part carries out powder conveying. At this time, the quantitative part is in a state of no interaction force with the transmission part, and the spreading part and the driving part are both in a static state; when the quantitative part presents the initial powder delivery state, the quantitative part synchronously presents the secondary dynamic local powder falling state. At this time, the quantitative part is in a state of applying force to the transmission part with interaction force, and the transmission part is in a state of synchronously driving the spreading part to spread the added powder and an energy storage state, so as to realize the spreading of powder, intermittent driving and quantitative powder supply to the powder outlet 2 for the purpose of 3D printing in a reciprocating manner, thereby avoiding the concentrated accumulation of powder to reduce the risk of powder agglomeration or coagulation, maintaining the fluidity of powder, reducing the amount of powder that cannot be used due to local accumulation and the change of powder properties caused by local accumulation, and at the same time avoiding the problem of powder difficulty in falling due to factors such as friction and cohesion between powder particles, thereby reducing the fluctuation and unevenness of powder amount during the powder supply process to achieve quantitative powder supply.

[0084] As a preferred embodiment of the present invention, the quantitative unit includes:

[0085] A quantitative installation block 5 is fixedly arranged in the powder bin 1;

[0086] The quantitative installation groove 6 is provided in the middle of the quantitative installation block 5, and the top and the bottom are both open;

[0087] The quantitative rotating shaft 8 passes through the quantitative mounting groove 6 and is rotatably arranged on the powder bin 1 with damping, and one end of the shaft passes through and rotates on the side wall of the powder bin 1;

[0088] A quantitative conveying roller 7 is fixedly arranged on a quantitative rotating shaft 8 located in the area of ​​the quantitative installation groove 6;

[0089] The quantitative groove 9 is symmetrically arranged on the quantitative conveying roller 7; and

[0090] A quantitative driving mechanism, arranged on the outer wall of the powder bin 1, for driving the quantitative rotating shaft 8;

[0091] Among them, the quantitative rotating shaft 8 is sealed and rotated on the quantitative installation groove 6, the quantitative installation groove 6, the quantitative rotating shaft 8 and the quantitative conveying roller 7 are coaxially arranged, the sum of the arc lengths corresponding to the quantitative groove 9 is greater than half of the circumference of the quantitative conveying roller 7, and the open end at the bottom of the quantitative installation groove 6 is interconnected with the powder lower port 2.

[0092] When the quantitative conveying roller 7 is isolated from the powder and the quantitative slot 9 is in a dynamic partial powder drop state, the quantitative conveying roller 7 is in a state of exerting a force on the transmission part with an interaction force, and the transmission part is in a state of synchronously driving the spreading part to spread the powder and an energy storage state;

[0093] When the quantitative conveying roller 7 is in a static quantitative powder taking state with the quantitative groove 9 facing upward, the quantitative conveying roller 7 is in a state of no interaction force with the transmission part, and the transmission part is in a state of driving the spreading part to spread the powder in the reverse direction and driving the toggling part to toggle the powder to drop the powder;

[0094] When the quantitative conveying roller 7 is in the state of conveying powder, the quantitative conveying roller 7 is in a state of no interaction force with the transmission part, and the spreading part and the shifting part are in a static state;

[0095] When the quantitative groove 9 for conveying powder presents the initial powder delivery state, the symmetrically arranged quantitative groove 9 presents the secondary dynamic local powder falling state synchronously.

[0096] Furthermore, in order to improve the effect of powder falling, the middle part of the upper surface of the quantitative installation block 5 corresponding to the quantitative conveying roller 7 is arranged in a "V" shape.

[0097] In the actual application process of this embodiment, the powder is added to the powder bin 1 through the powder inlet bin 3. At this time, the quantitative conveying roller 7 and the powder are isolated from each other, and the quantitative conveying roller 7 is in an initial contact state with the transmission part, that is, the quantitative slot 9 and the powder are staggered. When the 3D printing quantitative powder supply is started, the quantitative driving mechanism drives the quantitative conveying roller 7 through the quantitative rotating shaft 8, and the quantitative slot 9 and the powder are in a dynamic local powder falling state, that is, as the quantitative slot 9 turns, the powder gradually falls into the quantitative slot 9, and the quantitative conveying roller 7 is in a state of applying force to the transmission part with an interaction force. At this time, the transmission part is in a state of synchronously driving the spreading part to spread the added powder and an energy storage state, which avoids the problem of concentrated accumulation of powder in the process of spreading the powder while promoting the falling of powder synchronously;

[0098] When the quantitative conveying roller 7 is in a static quantitative powder taking state with the quantitative groove 9 facing upward, the quantitative conveying roller 7 is in a state of no interaction force with the transmission part, and the energy stored in the transmission part is released to drive the spreading part to spread the powder in the reverse direction and drive the toggling part to toggle the powder to drop the powder. The reverse spreading of the powder by the spreading part can effectively spread the powder in the powder bin 1 in a timely and uniform manner while promoting the fluidity of the powder. The toggling part toggle the powder to drop the powder can further promote the fluidity of the powder to improve the powder taking effect of the quantitative part.

[0099] After the quantitative conveying roller 7 has completed static powder collection with the quantitative groove 9 facing upward, the quantitative conveying roller 7 is in a powder conveying state. At this time, the quantitative conveying roller 7 is in a state of no interaction force with the transmission part, and the spreading part and the shifting part are both in a static state;

[0100] When the quantitative groove 9 for conveying powder is in the initial powder delivery state, the symmetrically arranged quantitative groove 9 is synchronously in the secondary dynamic local powder falling state. At this time, the quantitative conveying roller 7 is in the state of exerting force on the transmission part with interactive force, and the transmission part is in the state of synchronously driving the spreading part to spread the added powder and the energy storage state, and this cycle continues.

[0101] As a preferred embodiment of the present invention, the outer wall of the powder bin 1 located away from the powder inlet bin 3 is provided with a mounting cover 10 for shielding the quantitative drive mechanism, and the quantitative drive mechanism includes:

[0102] A driving motor (not shown in the figure) is fixedly arranged on the outer wall of the powder bin 1;

[0103] A driving shaft 12, one end of which is rotatably disposed on the mounting cover 10, and the other end of which is detachably connected to the output shaft of the driving motor via a coupling;

[0104] The incomplete driving gear 13 is fixedly disposed on the driving shaft 12; and

[0105] The driven gear 14 is fixedly mounted on the quantitative rotating shaft 8 in the mounting cover 10 and is intermittently meshed with the incomplete driving gear 13;

[0106] The end of the quantitative rotating shaft 8 penetrating the side wall of the powder bin 1 is rotatably disposed on the mounting cover 10 .

[0107] When the incomplete driving gear 13 and the driven gear 14 are in a meshing state, the metering slot 9 is in a dynamic partial powder falling state or the metering conveying roller 7 is in a powder conveying state; when the incomplete driving gear 13 and the driven gear 14 are in a non-meshing state, the metering conveying roller 7 drives the metering slot 9 on one side to be in an upward static quantitative powder taking state, and the metering slot 9 on the other side is in a complete powder delivery state.

[0108] In the actual application process of this embodiment, through the mutual cooperation of the incomplete driving gear 13 and the driven gear 14 that are meshed with each other, when the incomplete driving gear 13 and the driven gear 14 are in a meshing state, the quantitative groove 9 is in a dynamic local powder falling state or the quantitative conveying roller 7 is in a powder conveying state; when the incomplete driving gear 13 and the driven gear 14 are in a non-meshing state, the quantitative conveying roller 7 drives the quantitative groove 9 on one side to be in an upward static quantitative powder taking state, and the quantitative groove 9 on the other side is in a complete powder delivery state. Every time the incomplete driving gear 13 rotates half a circle, a static quantitative powder taking of the quantitative groove 9 on one side and a complete powder delivery of the quantitative groove 9 on the other side are realized, that is, every time the incomplete driving gear 13 rotates one circle, two quantitative powders are realized, thereby realizing intermittent quantitative delivery of powder to ensure the orderly progress of 3D printing.

[0109] As a preferred embodiment of the present invention, an installation avoidance groove 15 is provided in the quantitative installation block 5, and a first support 16 for providing installation support is fixedly arranged on the bottom inner wall of the installation avoidance groove 15, and a transmission avoidance groove 23 is provided on the quantitative installation block 5 located between the installation avoidance groove 15 and the quantitative installation groove 6, and the transmission part includes:

[0110] The transmission shaft 18 is rotatably disposed on the installation avoidance groove 15;

[0111] The transmission wheel 19 is fixedly arranged on the transmission shaft 18 and interacts with the quantitative conveying roller 7 intermittently;

[0112] Energy storage springs 20, at least one set, one end of which is fixedly mounted on the transmission shaft 18, and the other end of which is fixedly mounted on the inner wall of the installation avoidance groove 15, for storing energy and providing power; and

[0113] The transmission driven shaft 21 has one end rotatably disposed on the first support 16 and the other end penetrates and rotates on the side wall of the powder bin 1;

[0114] The transmission driven shaft 21 is rotatably arranged with the quantitative installation block 5, the transmission shaft 18 and the transmission driven shaft 21 are connected by a first transmission member, the transmission driven shaft 21 and the spreading part are connected by a second transmission member, the transmission driven shaft 21 and the shifting part are connected by an intermittent transmission mechanism, and the transmission wheel 19 overflows the surface of the quantitative installation groove 6 through the transmission avoidance groove 23;

[0115] It should be noted that, in the present embodiment, the first transmission member and the second transmission member can be a belt pair or a chain pair, and are products already available in the prior art. The present embodiment is not limited thereto. The first transmission member, the combined structure diagram of the first transmission member and the transmission shaft 18 and the transmission driven shaft 21, the second transmission member and the combined structure diagram of the second transmission member and the transmission driven shaft 21 and the spreading part in the accompanying drawings are only used as structural diagrams and have no practical significance. In actual scenarios, they are used and installed according to existing products. Therefore, the first transmission member and the second transmission member in the present embodiment are not described in detail, and it is only necessary to achieve the purpose of power transmission.

[0116] In the actual application of this embodiment, when the quantitative conveying roller 7 contacts the transmission wheel 19, at this time, either the quantitative groove 9 on one side performs dynamic local powder dropping and the quantitative groove 9 on the other side performs powder delivery, or the quantitative groove 9 on one side ends the static quantitative powder taking state and the quantitative groove 9 on the other side ends the powder complete delivery state. At this moment, under the action of the friction force between the quantitative conveying roller 7 and the transmission wheel 19, the positive rotation of the quantitative conveying roller 7 drives the reverse rotation of the transmission wheel 19, that is, drives the transmission shaft 18 to rotate in the opposite direction. Under the joint action of the first transmission member, the transmission driven shaft 21 and the second transmission member, the spreading part is driven to spread the powder, that is, the powder can be driven to ensure the falling amount of the quantitative groove 9, and at the same time, the powder in the powder bin 1 can be evenly spread to reduce the amount of powder that cannot be used due to local accumulation and the change of powder properties caused by local accumulation. At this time, the intermittent transmission mechanism controls the transmission driven shaft 21 to have no interaction with the toggle part, that is, the toggle part is in a static rotation state, and at the same time, the energy storage spring 20 is in a tightened state to store energy;

[0117] When the metering slot 9 rotates to the position of the transmission wheel 19, that is, the metering slot 9 is in a static quantitative powder taking state, the quantitative conveying roller 7 and the transmission wheel 19 are in a state of no interaction force. At this time, the energy stored in the energy storage spring 20 will be gradually released, driving the transmission shaft 18 to rotate in the opposite direction to the previous direction. Under the action of the intermittent transmission mechanism, the driving part is driven to stir the powder and drop the powder, that is, to stir the powder to fall in order to further ensure the amount of powder falling in the metering slot 9 and realize stable and accurate quantitative powder supply. Under the joint action of the first transmission member, the transmission driven shaft 21 and the second transmission member, the driving spreading part is driven to spread the powder in the reverse direction to evenly spread the powder accumulation state in the current powder bin 1 to prepare for the next powder taking, while reducing the amount of powder that cannot be used due to local accumulation and the change of powder properties caused by local accumulation.

[0118] As a preferred embodiment of the present invention, a paving installation bracket 22 is provided on the top of the powder bin 1. The paving installation bracket 22 is U-shaped and is located between the quantitative installation block 5 and the top of the powder bin 1. The inner walls on both sides of the powder bin 1 are semicircular. A paving avoidance groove 24 is provided in the middle of the top of the powder bin 1. The paving portion includes:

[0119] The paving shaft 25 is rotatably mounted on the paving mounting bracket 22, and one end of the paving shaft passes through the paving mounting bracket 22;

[0120] A paving driving plate 26 is slidably disposed on the paving mounting bracket 22;

[0121] The guide blocks 27 are provided in two groups, respectively located in the middle of the paving avoidance groove 24 and at the end of the paving avoidance groove 24 close to the driven transmission shaft 21, and are both slidably provided in the paving avoidance groove 24;

[0122] The spreading drive shaft 28 corresponds to the guide block 27 one by one, and penetrates the guide block 27 and extends into the powder bin 1;

[0123] A spreading rack plate 29, fixedly arranged on the top of the powder bin 1;

[0124] The paving gear 30 meshes with the paving rack plate 29 and corresponds one-to-one with the paving drive shaft 28; and

[0125] The spreading plate 31 corresponds to the spreading drive shaft 28 one by one and is fixedly arranged at the end of the spreading drive shaft 28 located in the powder bin 1;

[0126] Among them, the spreading shaft 25 is connected to the driven transmission shaft 21 through the second transmission member, the spreading shaft 25 and the spreading drive plate 26 are connected to each other through a gear rack pair, the spreading drive shaft 28 is rotatably set on the spreading drive plate 26 and the guide block 27, the spreading gear 30 is fixedly set on the spreading drive shaft 28, the length of the spreading plate 31 which is perpendicular to the spreading drive shaft 28 is matched with the inner wall width of the powder bin 1, and the spacing between adjacent spreading plates 31 is greater than half of the sum of the lengths of the spreading plates 31.

[0127] Furthermore, in order to better evenly spread the powder in the powder bin 1 , a plurality of hollow grooves 32 are provided on the spreading plate 31 .

[0128] In the actual application of this embodiment, under the action of the friction between the quantitative conveying roller 7 and the transmission wheel 19, the positive rotation of the quantitative conveying roller 7 drives the reverse rotation of the transmission wheel 19, that is, drives the transmission shaft 18 to rotate in the opposite direction, and under the joint action of the first transmission member, the transmission driven shaft 21 and the second transmission member, drives the paving shaft 25 to rotate in the opposite direction, and under the transmission action of the gear rack pair, drives the paving driving plate 26 to slide horizontally, that is, drives the guide block 27 and the paving driving shaft 28 to slide horizontally along the paving avoidance groove 24, and drives the paving rack plate 26 to slide horizontally. 9 and the spreading gear 30, the spreading drive shaft 28 is driven to rotate during the lateral movement, and then the spreading plate 31 is driven to perform rotary horizontal movement and spreading of the powder in the powder bin 1. Since the length of the spreading plate 31 perpendicular to the spreading drive shaft 28 matches the width of the inner wall of the powder bin 1, that is, the spreading plate 31 matches the semicircular shape of the inner walls on both sides of the powder bin 1, the spreading plate 31 can fully spread the powder in the powder bin 1 in a rotary and uniform manner, and at the same time, the energy storage spring 20 is in a tightened state to store energy;

[0129] When the metering slot 9 rotates to the position of the transmission wheel 19, that is, the metering slot 9 is in a static quantitative powder taking state, the metering conveying roller 7 and the transmission wheel 19 are in a state of no interaction force. At this time, the energy stored in the energy storage spring 20 will be gradually released, driving the transmission shaft 18 to rotate in the opposite direction to the previous direction. Under the joint action of the first transmission member, the transmission driven shaft 21 and the second transmission member, the spreading shaft 25 is driven to rotate in the opposite direction to the previous direction. Under the transmission action of the gear rack pair, the spreading drive plate 26 is driven to slide horizontally in the opposite direction to the previous direction, that is, the guide block 27 and the spreading drive shaft 28 are driven to slide in the opposite direction along the spreading avoidance groove 24. Similarly, under the joint action of the spreading rack plate 29 and the spreading gear 30, the spreading drive shaft 28 is driven to rotate in the opposite direction during the lateral movement, and then continues to drive the spreading plate 31 to perform rotational horizontal movement and spreading of the powder in the powder bin 1, thereby evenly spreading the powder accumulation state in the current powder bin 1 to prepare for the next powder taking, while reducing the amount of powder that cannot be used due to local accumulation and the change in powder properties caused by local accumulation.

[0130] As a preferred embodiment of the present invention, the bottom inner wall of the installation avoidance groove 15 is fixedly provided with a second support 17 for providing installation support, and the installation avoidance groove 15 is fixedly provided with a support partition 33, and the support partition 33 is located above the second support 17, and the toggle portion includes:

[0131] The toggle plate 35 has one end which is swingably disposed in the powder bin 1 and is located on the top of the quantitative mounting block 5;

[0132] The rotating shaft 34 is turned to rotate on the second support 17 and the installation avoidance groove 15;

[0133] The toggle protrusion 36 is fixedly disposed on the toggle shaft 34, and has an uneven outer surface;

[0134] A toggle lever 37, at least one set, is slidably disposed on the supporting partition 33; and

[0135] The reset mechanism corresponds to the toggle rod 37 one by one, is arranged between the toggle rod 37 and the supporting partition 33, and is used for elastic toggle reset of the toggle rod 37;

[0136] Among them, the toggle shaft 34 and the driven transmission shaft 21 are connected through an intermittent transmission mechanism, the toggle shaft 34 and the driven transmission shaft 21 are coaxially arranged, the lower end of the toggle rod 37 is always in contact with the surface of the toggle protrusion column 36, the upper end of the toggle rod 37 passes through the quantitative mounting block 5 and is always in contact with the bottom of the toggle plate 35, and a number of powder passing grooves 38 are evenly arranged on the toggle plate 35 located directly above the quantitative conveying roller 7, and the distance between the bottom of the spreading plate 31 and the toggle plate 35 is greater than the maximum displacement generated by the toggle protrusion column 36 driving the toggle rod 37.

[0137] Specifically, the reset mechanism includes:

[0138] A reset plate 39 is fixedly mounted on the toggle rod 37; and

[0139] The return spring 40 is sleeved on the toggle rod 37 , and two ends thereof are respectively connected to the return plate 39 and the support partition plate 33 .

[0140] Specifically, the intermittent transmission mechanism includes:

[0141] The ratchet wheel 41 is fixedly disposed on the end of the transmission driven shaft 21 facing the side of the shifting shaft 34;

[0142] An intermittent avoidance groove 42 is formed at the end of the shifting protrusion 36 facing the ratchet wheel 41; and

[0143] The ratchet pawl 4 cooperates with the ratchet wheel 41 and is elastically rotatably disposed on the inner wall of the intermittent avoidance groove 42;

[0144] Among them, the ratchet 41 is located inside the intermittent avoidance groove 42; when the quantitative conveying roller 7 and the transmission wheel 19 are in a state of interaction force, there is no locking force relationship between the pawl 4 and the ratchet 41; when the quantitative conveying roller 7 and the transmission wheel 19 are in a state of no interaction force, there is a locking force relationship between the pawl 4 and the ratchet 41, thereby realizing intermittent transmission of power.

[0145] Furthermore, in order to improve the smoothness of contact between the lower end of the toggle rod 37 and the surface of the toggle protrusion 36 and the smoothness of contact between the upper end of the toggle rod 37 and the bottom of the toggle plate 35, movable balls are rolled on the upper and lower ends of the toggle rod 37.

[0146] In the actual application of this embodiment, when the quantitative conveying roller 7 and the transmission wheel 19 are in a state of mutual force, there is no engagement force relationship between the pawl 4 and the ratchet wheel 41, that is, the rotation of the transmission driven shaft 21 cannot drive the rotation of the toggle shaft 34; when the quantitative conveying roller 7 and the transmission wheel 19 are in a state of no mutual force, there is an engagement force relationship between the pawl 4 and the ratchet wheel 41, that is, the rotation of the transmission driven shaft 21 drives the rotation of the toggle shaft 34. At this time, the quantitative slot 9 is in an upward static quantitative powder taking state. Due to the toggle shaft 34 When the lever 37 is rotated, the protruding column 36 is driven to rotate. Since the outer surface of the protruding column 36 is uneven and the lower end of the lever 37 is always in contact with the surface of the protruding column 36, the lever 37 is driven to move up and down, thereby driving the lever plate 35 to swing back and forth, and then the powder is intermittently moved to promote the powder to fall into the quantitative groove 9, avoiding the problem of insufficient powder supply caused by the falling obstacle caused by the friction and cohesion between the powder particles when the powder falls freely, and at the same time reducing the load of the transmission wheel 19.

[0147] Furthermore, in order to prevent the powder from being accumulated on the inner wall of the powder bin 1 , brushes (not shown in the figure) are provided on both side walls of the toggle rod 37 .

[0148] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A quantitative powder and ink supply set, comprising a powder bin (1) and a quantitative portion for quantitatively supplying powder; characterized in that: Also includes: A moving part, arranged on the quantitative part, for intermittently moving the powder above the quantitative part; A spreading part is arranged on the powder bin (1) and above the quantitative part, and is used for spreading the added powder back and forth; and The transmission part is arranged on the quantitative part and is used for power transmission and energy storage of the quantitative part to synchronously drive the spreading part and the intermittently drive the shifting part; When the quantitative part and the powder are in an isolated state and the quantitative part is in a dynamic partial powder dropping state, the quantitative part is in a state of exerting a force on the transmission part with an interaction force, and the transmission part is in a state of synchronously driving the spreading part to spread the powder and in an energy storage state; When the quantitative part is in a static quantitative powder taking state, the quantitative part is in a state of no interaction force with the transmission part, and the transmission part is in a state of driving the spreading part to spread the powder in the reverse direction and driving the moving part to move the powder to drop the powder; When the quantitative part is in the powder conveying state, the quantitative part is in a state of no interaction force with the transmission part, and the spreading part and the shifting part are in a static state; When the quantitative part presents the initial powder delivery state, the quantitative part presents the secondary dynamic local powder falling state synchronously; Wherein, the transmission part is located on the side of the return journey after the quantitative part completes the powder delivery.

2. The quantitative powder and ink supply set according to claim 1, characterized in that: A powder inlet bin (3) is fixedly arranged on the outer side of the powder bin (1) opposite to the powder inlet.

3. The quantitative powder and ink supply set according to claim 2, characterized in that: The bottom inner wall of the powder inlet bin (3) is an inclined surface with the bottom end facing the powder bin (1).

4. The quantitative powder and ink supply set according to claim 1, characterized in that: The quantitative unit comprises: A quantitative installation block (5) is fixedly arranged in the powder bin (1); The quantitative installation groove (6) is provided in the middle of the quantitative installation block (5), and the top and the bottom are both open; A quantitative rotating shaft (8) is provided on the powder bin (1) in a rotational manner with damping, and one end of the shaft penetrates and rotates on the side wall of the powder bin (1); A quantitative conveying roller (7) is fixedly arranged on a quantitative rotating shaft (8); A quantitative groove (9) is symmetrically arranged on the quantitative conveying roller (7); and A quantitative driving mechanism, arranged on the outer wall of the powder bin (1) and used for driving the quantitative rotating shaft (8); The quantitative installation groove (6), the quantitative rotating shaft (8) and the quantitative conveying roller (7) are coaxially arranged, the sum of the arc lengths corresponding to the quantitative groove (9) is greater than half the circumference of the quantitative conveying roller (7), and the open end at the bottom of the quantitative installation groove (6) is in communication with the powder outlet (2).

5. The quantitative powder and ink supply set according to claim 4, characterized in that: The outer side wall of the powder bin (1) is provided with a mounting cover (10), and the quantitative driving mechanism comprises: A driving motor is fixedly mounted on the outer wall of the powder bin (1); A driving shaft (12), one end of which is rotatably mounted on the mounting cover (10) and the other end of which is detachably connected to the output shaft of the driving motor; An incomplete driving gear (13) is fixedly mounted on the driving shaft (12); and A driven gear (14) is fixedly disposed on the quantitative rotating shaft (8) and is intermittently meshed with the incomplete driving gear (13); When the incomplete driving gear (13) and the driven gear (14) are in a meshing state, the quantitative groove (9) is in a dynamic partial powder dropping state or the quantitative conveying roller (7) is in a powder conveying state; when the incomplete driving gear (13) and the driven gear (14) are in a non-meshing state, the quantitative conveying roller (7) drives the quantitative groove (9) on one side to be in an upward static quantitative powder taking state, and the quantitative groove (9) on the other side is in a powder delivery complete state.

6. The quantitative powder and ink supply set according to claim 4, characterized in that: The quantitative installation block (5) is provided with an installation avoidance groove (15), a first support (16) is fixedly arranged on the inner wall at the bottom of the installation avoidance groove (15), and the quantitative installation block (5) is provided with a transmission avoidance groove (23), and the transmission part comprises: A transmission shaft (18) is rotatably disposed on the installation avoidance groove (15); A transmission wheel (19) is fixedly mounted on the transmission shaft (18) and intermittently interacts with the quantitative conveying roller (7); An energy storage spring (20) is provided in at least one group, one end of which is fixedly provided on the transmission shaft (18) and the other end of which is fixedly provided on the inner wall of the installation avoidance groove (15); and A transmission driven shaft (21), one end of which is rotatably mounted on the first support (16), and the other end of which penetrates and rotates on the side wall of the powder bin (1); The transmission shaft (18) and the driven transmission shaft (21) are connected via a first transmission member, the driven transmission shaft (21) and the spreading part are connected via a second transmission member, the driven transmission shaft (21) and the shifting part are connected via an intermittent transmission mechanism, and the transmission wheel (19) overflows the surface of the quantitative installation groove (6).

7. The quantitative powder and ink supply set according to claim 6, characterized in that: A spreading installation bracket (22) is provided on the top of the powder bin (1), which is located between the quantitative installation block (5) and the top of the powder bin (1). The inner walls on both sides of the powder bin (1) are semicircular, and a spreading avoidance groove (24) is provided in the middle of the top of the powder bin (1). The spreading part comprises: A paving shaft (25) is rotatably mounted on the paving mounting bracket (22), and one end of the paving shaft passes through the paving mounting bracket (22); A paving driving plate (26) is slidably arranged on the paving mounting bracket (22); The guide blocks (27) are arranged in two groups, respectively located at the middle of the paving avoidance groove (24) and at the end of the paving avoidance groove (24) close to one side of the driven transmission shaft (21), and are both slidably arranged in the paving avoidance groove (24); The paving drive shaft (28) corresponds to the guide block (27) one by one; A spreading rack plate (29) is fixedly arranged on the top of the powder bin (1); A paving gear (30) meshes with the paving rack plate (29) and corresponds one-to-one with the paving drive shaft (28); and A paving plate (31) corresponds to the paving drive shaft (28) one by one and is fixedly arranged at the end of the paving drive shaft (28); The spreading shaft (25) is connected to the driven shaft (21) via a second transmission member, the spreading shaft (25) and the spreading drive plate (26) are connected via a gear rack pair, the spreading drive shaft (28) is rotatably arranged on the spreading drive plate (26) and the guide block (27), the spreading gear (30) is fixedly arranged on the spreading drive shaft (28), the length of the spreading plate (31) perpendicular to the spreading drive shaft (28) is matched with the inner wall width of the powder bin (1), and the spacing between adjacent spreading plates (31) is greater than half of the sum of the lengths of the spreading plates (31).

8. The quantitative powder and ink supply set according to claim 7, characterized in that: The paving plate (31) is provided with a plurality of hollow grooves (32).

9. The quantitative powder and ink supply set according to claim 6, characterized in that: A second support (17) is fixedly arranged on the inner wall of the bottom of the installation avoidance groove (15), a supporting partition (33) is fixedly arranged on the installation avoidance groove (15), and the toggle portion comprises: A toggle plate (35) has one end which is swingably disposed in the powder bin (1) and is located on top of the quantitative mounting block (5); The rotating shaft (34) is turned to be rotatably disposed on the second support (17) and the installation avoidance groove (15); The toggle protrusion column (36) is fixedly arranged on the toggle rotating shaft (34) and has an uneven outer surface; A toggle rod (37), at least one set, is slidably disposed on the supporting partition (33); and A reset mechanism, corresponding to the toggle rod (37) one by one, and arranged between the toggle rod (37) and the supporting partition (33); The toggle shaft (34) and the driven transmission shaft (21) are connected to each other through an intermittent transmission mechanism. The toggle shaft (34) and the driven transmission shaft (21) are arranged coaxially. The lower end of the toggle rod (37) is always in contact with the surface of the toggle protrusion column (36). The upper end of the toggle rod (37) passes through the quantitative mounting block (5) and is always in contact with the bottom of the toggle plate (35). A plurality of powder passing grooves (38) are evenly arranged on the toggle plate (35) directly above the quantitative conveying roller (7). The spacing between the bottom of the spreading plate (31) and the toggle plate (35) is greater than the maximum displacement generated by the toggle protrusion column (36) driving the toggle rod (37).

10. The quantitative powder and ink supply set according to claim 5, characterized in that: The reset mechanism comprises: A reset plate (39) is fixedly mounted on the toggle rod (37); and The reset spring (40) is sleeved on the toggle rod (37), and the two ends are respectively connected to the reset plate (39) and the supporting partition plate (33).

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