Screw type sealing mechanism for powder discharging and powder brewing machine

Abstract

The sealing mechanism comprises a machine body and a powder box assembly placed on the machine body, the powder box assembly comprises a powder storage box and a guide pipe arranged at the bottom of the powder storage box, a powder outlet is formed in the lower portion of the guide pipe, and a powder inlet is formed in the upper portion of the guide pipe; a powder outlet screw rod is arranged in the guide pipe, and the powder outlet screw rod rotates and extrudes powder out of a powder outlet of the guide pipe; in addition, a sealing bottom cover arranged at the bottom of the guide pipe is further included, the sealing bottom cover is provided with a powder outlet and a powder falling opening, and a sealing piece is movably arranged at the bottom of the sealing bottom cover. And a first transmission part for driving the powder outlet screw rod to rotate is also arranged on the sealing bottom cover in a penetrating manner. Therefore, by adopting the lower plane type sealing, the opening angle between the powder outlet and the powder falling opening is 180 degrees, so that the powder falling is smoother, and the powder blocking phenomenon is not easy to occur; and meanwhile, the sealing performance is better, and the risk of powder leakage can be greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of powder dispensing, and in particular to a screw-type powder feeding sealing mechanism and a powder dispensing machine. Background Art

[0002] This section only provides background information related to the present application to help those skilled in the art understand the present application more thoroughly and accurately, and it is not necessarily prior art.

[0003] Milk powder is a common food for people, especially infants and the elderly. However, there are many problems in the existing milk powder brewing: first, it cannot be measured, and the result of the inability to measure is that the concentration of milk brewed each time is different, which is very disadvantageous for infants. When too much milk powder is added, it will cause indigestion in infants, and when too little milk powder is added, it will cause malnutrition in infants; second, whether it is canned or bagged, the lid must be opened every time when it is used, so that the milk powder is exposed to the air many times, which will cause environmental pollution to the milk powder and shorten the shelf life of the milk powder; third, there are many procedures for brewing milk, which is time-consuming and laborious.

[0004] The emergence of automatic milk makers makes it easier for people to prepare milk powder, adding convenience to people's lives. For the existing automatic milk makers on the market, users only need to put milk powder and water in advance, and the automatic milk maker can automatically add water and milk powder according to the pre-set ratio and automatically stir and mix, thereby greatly improving the efficiency of milk preparation and ensuring the quality of milk preparation. In order to prevent the steam generated during the milk preparation process from escaping into the milk box where the milk powder is temporarily stored and causing the milk powder to become damp and deteriorate, a sealing cover plate needs to be set at the powder drop port of the milk box to seal the milk powder, so as to ensure the storage quality of the milk powder.

[0005] Among them, most automatic milk making machines use a screw type powder feeding, and the screw type powder feeding usually adopts the following methods to achieve sealing: the first is to open the powder outlet at a non-tube mouth position of the powder outlet spiral tube, at this time a sealing sleeve is provided on the spiral tube, and the sealing sleeve is driven to rotate by the same power as the metering device to open or close the powder outlet, such as a fully automatic milk mixer disclosed in application No. 201510825599.7; the second is to set the powder outlet at the tube mouth of the spiral tube, and a sealing cover is hinged at the tube mouth of the spiral tube, and the sealing cover is driven to flip by using a separate power device to open or close the powder outlet; for the first sealing structure, since it is necessary to ensure that the sealing sleeve can completely wrap the powder outlet, the opening angle of the powder outlet cannot be 180 degrees, so it is easy to get blocked when feeding the powder, thereby causing the powder to be discharged unsmoothly; for the second sealing structure, the sealing cover is prone to powder throwing when sealing or opening the powder outlet, and at the same time, an independent driving device is provided at the bottom of the powder box to drive the sealing cover to move, which easily leads to an overly complicated powder box structure, and it is very inconvenient to disassemble, wash and maintain. Summary of the invention

[0006] In order to overcome the defects of the prior art described above, the present invention provides a screw-type powder-feeding sealing mechanism and a powder brewing machine, by arranging a sealing bottom cover at the bottom of the guide tube, the sealing bottom cover is provided with a powder-feeding port that overlaps and is connected with the powder outlet, and a sealing member is movably provided at the bottom of the sealing bottom cover to open or close the powder-feeding port. With such an arrangement, the lower plane seal is adopted, which can not only make the opening angle of the powder outlet and the powder-feeding port 180 degrees, thereby making the powder-feeding smoother and less prone to powder blockage, but also has better sealing performance, which can greatly reduce the risk of powder leakage. In addition, by separately arranging a second driving device on the machine body to drive the seal to rotate, the overall structure of the powder box assembly is simplified, making it easier to disassemble, wash and maintain, and at the same time, its transmission matching relationship is simpler, the matching accuracy requirement is lower, and the control logic is also relatively simple.

[0007] The technical solution adopted by the present invention to solve the problem is:

[0008] A screw-type powder feeding sealing mechanism comprises a body with a material storage cavity and a powder box assembly detachably placed in the material storage cavity, wherein:

[0009] The powder box assembly comprises:

[0010] (a) a powder storage box for storing powder;

[0011] (b) a guide tube disposed at the bottom of the powder storage box, wherein a powder outlet is disposed at the lower portion of the guide tube, and a powder inlet communicated with the powder storage box is disposed at the upper portion of the guide tube;

[0012] (c) a powder discharging screw disposed inside the guide tube, the powder discharging screw rotating to extrude powder from a powder discharging port of the guide tube;

[0013] (d) a sealed bottom cover disposed at the bottom of the guide tube, wherein the sealed bottom cover is provided with a powder drop opening, and the powder drop opening coincides with and is in communication with the powder outlet of the guide tube;

[0014] (e) a sealing member movably disposed at the bottom of the sealed bottom cover;

[0015] (f) a first transmission member which is disposed on the sealing bottom cover and is used to drive the powder discharging screw to rotate;

[0016] In addition, it also includes a first driving device and a second driving device arranged in the machine body, the output end of the first driving device is connected to the second transmission member, the second transmission member is at least partially located in the material storage chamber and is used to cooperate with the first transmission member to drive the powder discharge screw to rotate; the output end of the second driving device is connected to the third transmission member, the third transmission member is at least partially located in the material storage chamber and is used to drive the sealing member to open or close the powder drop port;

[0017] A controller is also arranged in the machine body, and controls the actions of the first driving device and the second driving device through electrical connection.

[0018] Furthermore, when powder needs to be discharged, the sealing member acts before the powder discharge screw to open the powder discharge port, and then the powder discharge screw rotates to discharge powder; when sealing is required, the powder discharge screw acts before the sealing member to stop discharging powder, and then the sealing member acts to close the powder discharge port.

[0019] Further, the sealing member is a first sealing cover plate rotatably disposed at the bottom of the sealing bottom cover and coaxially disposed with the first transmission member, wherein:

[0020] The first sealing cover plate comprises a first cover plate body and a first convex plate portion extending from the edge of the first cover plate body. When the first sealing cover plate is driven to rotate, the first convex plate portion can cover or expose the powder drop opening to close or open the powder drop opening. The bottom surface of the sealing bottom cover is formed with a first sealing surface adapted to the top surface of the first convex plate portion, and the powder drop opening is located on the first sealing surface.

[0021] The third transmission member is a first transmission disk partially located in the storage cavity and transmission-connected to the first sealing cover plate, the output end of the second driving device is transmission-connected to the first gear, and the bottom of the first transmission disk is provided with a second gear meshing with the first gear.

[0022] Further, the sealing member is a second sealing cover plate rotatably disposed at the bottom of the sealing bottom cover and non-coaxially disposed with the first transmission member, wherein:

[0023] The second sealing cover plate comprises a second cover plate body and a second convex plate portion extending from the edge of the second cover plate body. When the second sealing cover plate is driven to rotate, the second convex plate portion can cover or expose the powder drop opening to close or open the powder drop opening. The bottom surface of the sealing bottom cover is formed with a second sealing surface adapted to the top surface of the second convex plate portion, and the powder drop opening is located on the second sealing surface.

[0024] The third transmission member is a second transmission disk that is partially located in the material storage cavity and is respectively transmission-connected to the second sealing cover plate and the output end of the second driving device.

[0025] Further, the sealing member is a third sealing cover plate slidably arranged at the bottom of the sealing bottom cover, and the third sealing cover plate can cover or expose the powder drop opening to realize opening or closing the powder drop opening, wherein:

[0026] The bottom of the sealing bottom cover is provided with a slide groove for the third sealing cover plate to slide, the bottom surface of the slide groove forms a third sealing surface adapted to the top surface of the third sealing cover plate, and the powder drop port is located on the third sealing surface;

[0027] The third transmission member is a transmission plate transmission-connected to the third sealing cover plate, the output end of the second driving device is transmission-connected to a third gear, and a rack meshing with the third gear is provided on the transmission plate.

[0028] Furthermore, a detachable inspection cover is provided at one end of the guide tube close to the powder outlet.

[0029] Furthermore, a rotatable material guide impeller is provided in the powder storage box, and the material guide impeller is used to drive the powder to rotate and enter the guide tube through the powder inlet on the guide tube;

[0030] The powder discharging screw and the material guiding impeller are both transmission-connected to the first transmission member.

[0031] Furthermore, the first transmission member comprises a first transmission shaft passing through the sealed bottom cover, wherein:

[0032] A fourth gear is provided at the upper end of the first transmission shaft, and a fifth gear meshing with the fourth gear is provided at one end of the powder discharge screw;

[0033] A sixth gear is also provided at the upper end of the first transmission shaft, and a seventh gear is provided at the bottom of the guide impeller, and the sixth gear and the seventh gear are meshed and driven with each other via a gear rod;

[0034] The lower end of the first transmission shaft is provided with a third transmission plate which is transmission-matched with the second transmission member.

[0035] Further, the second transmission member comprises a second transmission shaft, wherein:

[0036] A fourth transmission disc is provided at the upper end of the second transmission shaft and is partially located in the material storage cavity; a plurality of slots are provided on the third transmission disc; and a plurality of claws are provided on the fourth transmission disc to engage with the plurality of slots to achieve transmission connection;

[0037] The lower end of the second transmission shaft is drivingly connected to the output end of the first driving device.

[0038] In addition, the present invention also provides a powder brewing machine, comprising the above-mentioned screw-type powder feeding sealing mechanism.

[0039] In summary, the present invention provides a screw-type powder feeding sealing mechanism and a powder brewing machine, which have the following beneficial effects:

[0040] (1) The screw-type powder discharge sealing mechanism of the present invention is provided with a sealing bottom cover at the bottom of the guide tube, and the sealing bottom cover is provided with a powder discharge port that overlaps and communicates with the powder outlet, and a sealing member is movably provided at the bottom of the sealing bottom cover to open or close the powder discharge port. With such a configuration, by adopting a lower plane seal, not only can the opening angles of the powder outlet and the powder discharge port be set at 180 degrees, thereby making powder discharge smoother and less prone to powder blockage; at the same time, its sealing performance is better, which can greatly reduce the risk of powder leakage. In addition, by separately providing a second drive device on the machine body to drive the seal to rotate, the overall structure of the powder box assembly is simplified, making it easier to disassemble, wash and maintain, and at the same time, its transmission matching relationship is simpler, the matching accuracy requirement is lower, and the control logic is also simpler.

[0041] (2) The screw-type powder discharging sealing mechanism of the present invention has a time offset between powder discharging and sealing. When making milk, the sealing member moves before the powder discharging screw and opens the powder discharging port. When sealing, the sealing member lags behind the powder discharging screw to seal the powder discharging port. In this way, flying powder generated during the process of opening or sealing the powder discharging port can be reduced, making the structure simpler and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is an exploded schematic diagram of the sealing mechanism for screw-type powder feeding of the present invention;

[0043] Figure 2 for Figure 1 Schematic diagram of the explosion from another perspective;

[0044] Figure 3 It is an exploded schematic diagram of a powder box assembly in the screw-type powder feeding sealing mechanism of the present invention;

[0045] Figure 4 is a cross-sectional schematic diagram of a first transmission member in a powder box assembly of the present invention;

[0046] Figure 5 for Figure 3 Schematic diagram of the explosion from another perspective;

[0047] Figure 6 It is a cross-sectional schematic diagram of a powder box assembly in a screw-type powder feeding sealing mechanism of the present invention;

[0048] Figure 7 It is a schematic diagram of the explosion of a part of the body of the sealing mechanism for screw-type powder feeding of the present invention;

[0049] Figure 8 It is a cross-sectional schematic diagram of a part of the body of the screw-type powder feeding sealing mechanism of the present invention;

[0050] Fig. 9 This is an exploded schematic diagram of a screw-type powder feeding sealing mechanism according to another embodiment of the present invention;

[0051] Fig.10 for Fig. 9 Schematic diagram of the explosion from another perspective;

[0052] Fig.11 It is a schematic diagram of an explosion of a part of the body of a screw-type powder feeding sealing mechanism in another embodiment of the present invention;

[0053] Fig.12 The figure is a cross-sectional schematic diagram of a part of the body of a screw-type powder feeding sealing mechanism according to another embodiment of the present invention.

[0054] The meanings of the reference numerals are as follows:

[0055] 1. Powder box assembly; 11. Powder storage box; 111. Powder storage chamber; 112. Guide tube; 1121. Powder outlet; 1122. Powder inlet; 12. Sealed bottom cover; 121. Powder outlet; 13. First sealing cover plate; 131. First cover plate body; 1311. First clamping hole; 132. First convex plate portion; 14. First transmission member; 141. First transmission shaft; 142. Fourth gear; 143. Sixth gear; 144. Third transmission plate; 1441. Clamping slot; 15. Gear rod; 16. Guide impeller; 161. Seventh gear; 17. Outlet Powder screw; 171, fifth gear; 172, inspection cover; 18, powder box top cover; 19, third sealing cover plate; 191, second clamping hole; 2, machine body; 21, storage chamber; 22, second transmission member; 221, second transmission shaft; 222, fourth transmission plate; 223, claw; 23, first transmission plate; 231, first clamping block; 232, second gear; 24, first gear; 25, first driving device; 26, second driving device; 27, shell plate; 271, slide groove; 28, transmission plate; 281, second clamping block; 29, third gear. DETAILED DESCRIPTION

[0056] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0059] Embodiment 1

[0060] See also Figure 1-8 The present invention provides a screw-type sealing mechanism for powder discharge, comprising a body 2 with a material storage chamber 21 and a powder box assembly 1 detachably placed in the material storage chamber 21, the powder box assembly 1 comprising a powder storage box 11, the powder storage box 11 having a powder storage chamber 111 for storing powder; a guide tube 112 is provided at the bottom of the powder storage box 11, preferably, the guide tube 112 and the powder storage box 11 are integrally formed; a powder outlet 1121 is provided at the lower portion of the guide tube 112, and a powder inlet 1122 communicating with the powder storage chamber 111 is provided at the upper portion thereof; a powder outlet screw 17 is provided inside the guide tube 112, and the powder outlet screw 17 rotates to extrude powder from the powder outlet 1121 of the guide tube 112.

[0061] In addition, the powder box assembly 1 also includes a sealed bottom cover 12 disposed at the bottom of the guide tube 112, and a powder drop port 121 is disposed on the sealed bottom cover 12, and the powder drop port 121 overlaps and communicates with the powder outlet 1121 of the guide tube 112; preferably, the opening angles of the powder drop port 121 and the powder outlet 1121 are both set at 180 degrees. A movable seal is also disposed at the bottom of the sealed bottom cover 12, and the seal can be moved to open or close the powder drop port 121; the sealed bottom cover 12 is also provided with a first transmission member 14 for driving the powder outlet screw 17 to rotate.

[0062] Furthermore, it also includes a first drive device 25 and a second drive device 26 arranged in the machine body 2, the output end of the first drive device 25 is connected to the second transmission member 22, the second transmission member 22 is at least partially located in the material storage chamber 21 and is used to drive and cooperate with the first transmission member 14 to drive the powder output screw 17 to rotate; the output end of the second drive device 26 is connected to the third transmission member, the third transmission member is at least partially located in the material storage chamber 21 and is used to drive the seal to open or close the powder outlet 121. A controller is also arranged in the machine body 2, and controls the actions of the first drive device 25 and the second drive device 26 through electrical connection.

[0063] Therefore, by setting a sealed bottom cover 12 at the bottom of the guide tube 112, the sealed bottom cover 12 is provided with a powder drop port 121 that overlaps and communicates with the powder outlet 1121, and a seal is movably provided at the bottom of the sealed bottom cover 12 to open or close the powder drop port. In this way, by adopting a lower plane seal, not only can the opening angle of the powder outlet 1121 and the powder drop port 121 be set at 180 degrees, so that the powder drop is smoother and powder blockage is not easy to occur; at the same time, its sealing performance is better, which can greatly reduce the risk of powder leakage. In addition, by separately setting a second drive device 26 on the body 2 to drive the seal to rotate, the overall structure of the powder box assembly 1 is simplified, making it easier to disassemble and maintain, and at the same time, its transmission matching relationship is simpler, the matching accuracy requirement is lower, and the control logic is also simpler.

[0064] The machine body 2 further includes a shell plate 27 , and the first driving device 25 , the second driving device 26 , the second transmission member 22 and the third transmission member are all arranged on the shell plate 27 .

[0065] In the embodiment of the present invention, the first driving device 25 and the second driving device 26 are both driving motors, and are both electrically connected to the controller.

[0066] In the embodiment of the present invention, a powder box top cover 18 is further included. The powder box top cover 18 is disposed on the top of the powder storage box 11 to seal the powder storage cavity 111 .

[0067] Furthermore, the controller controls the first drive device 25 and the second drive device 26 to act successively so that the seal and the powder discharge screw 17 act differentially. Specifically, when powder discharge is required, the seal acts before the powder discharge screw 17 to open the powder discharge port 121, and then the powder discharge screw 17 rotates to discharge powder; when sealing is required, the powder discharge screw 17 acts before the seal to stop rotating to stop powder discharge, and then the seal acts to close the powder discharge port 121.

[0068] With such arrangement, since the powder discharge and the sealing are staggered in time, when making milk, the seal moves before the powder discharge screw 17 and opens the powder discharge port 121. When sealing, the seal lags behind the powder discharge screw 17 to seal the powder discharge port 121. In this way, the flying powder generated in the process of opening or sealing the powder discharge port 121 can be reduced, making its structure simpler and more reliable.

[0069] See also Figure 3-6 The sealing member is a first sealing cover plate 13 which is rotatably arranged at the bottom of the sealing bottom cover 12 and is coaxially arranged with the first transmission member 14. Specifically, the first sealing cover plate 13 includes a first cover plate body 131 and a first convex plate portion 132 extending from the edge of the first cover plate body 131. When the first sealing cover plate 13 is driven to rotate, the first convex plate portion 132 can be rotated to cover or expose the powder dropping port 121, thereby closing or opening the powder dropping port 121.

[0070] Among them, the bottom surface of the sealing bottom cover 12 is formed with a first sealing surface that is compatible with the top surface of the first convex plate portion 132, and the powder dropping port 121 is located on the first sealing surface; in this embodiment, the first sealing surface is the bottom surface of the sealing bottom cover 12 and is a plane, and the top surface of the first convex plate portion 132 is also a plane. Such a setting can ensure that when the first convex plate portion 132 rotates to the powder dropping port 121, the powder dropping port 121 can be completely sealed, thereby ensuring the sealing effect.

[0071] Of course, in other embodiments, the first sealing surface may also be other shaped surfaces, such as an arc surface, a conical surface, etc., as long as the top surface of the first convex plate portion 132 is matched with its shape, and there is no limitation here.

[0072] Among them, the third transmission member is a first transmission disk 23 which is partially located in the storage chamber and is transmission-connected to the first sealing cover plate 13. The first transmission disk 23 is provided with a first clamping block 231, and the first sealing cover plate 13 is provided with a first clamping hole 1311 which is clamped with the first clamping block 231 to achieve transmission connection; in addition, a first gear 24 is transmission-sleeved on the output shaft of the second driving device 26, and a second gear 232 which is meshed with the first gear 24 for transmission is provided on the first transmission disk 23.

[0073] Therefore, when the second driving device 26 drives the first gear 24 to rotate, it can drive the first transmission disk 23 to rotate through the meshing transmission with the second gear 232, and then drive the first sealing cover plate 13 to rotate through the clamping cooperation between the first clamping block 231 and the first clamping hole 1311, thereby realizing opening or closing the powder drop port.

[0074] It should be noted that, in other embodiments, the sealing member may also be a second sealing cover plate rotatably arranged at the bottom of the sealing bottom cover 12 and non-coaxially arranged with the first transmission member 14. Specifically, the second sealing cover plate includes a second cover plate body and a second convex plate portion extending from the edge of the second cover plate body. When the second sealing cover plate is driven to rotate, the second convex plate portion can cover or expose the powder dropping port 121 to close or open the powder dropping port 121; wherein, a second sealing surface adapted to the top surface of the second convex plate portion is formed on the bottom surface of the sealing bottom cover 12, and the powder dropping port 121 is located on the second sealing surface; the third transmission member is a second transmission disk partially located in the storage chamber and respectively connected to the second sealing cover plate and the output end of the second drive device 26.

[0075] Thus, when the second driving device 26 drives the second transmission disc to rotate, the second transmission disc can drive the second sealing cover plate to rotate to open or close the powder drop port. Therefore, when the second sealing cover plate is used as a sealing member, the first gear 24 and the second gear 232 can be omitted, making the structure simpler while achieving the same sealing effect.

[0076] See also Figure 3-6 A detachable inspection cover 172 is provided at one end of the guide tube 112 near the powder outlet 1121, so as to facilitate the maintenance and replacement of the powder outlet screw 17. A fifth gear 171 is provided at the other end of the guide tube 112, and a fourth gear 142 meshing with the fifth gear 171 is provided at the upper end of the first transmission member 14.

[0077] Specifically, the first transmission member 14 includes a first transmission shaft 141 that passes through the sealed bottom cover 12, and the fourth gear 142 is sleeved on the upper end of the first transmission shaft 141; in addition, a rotatable guide impeller 16 is also provided in the powder storage chamber 111 of the powder storage box 11, and the guide impeller 16 is used to drive the powder to rotate and enter the interior of the guide tube 112 through the powder inlet 1122 on the guide tube 112; a seventh gear 161 is provided at the bottom of the guide impeller 16, and a sixth gear 143 is also sleeved on the upper end of the first transmission shaft 141, and the sixth gear 143 and the seventh gear 161 are mutually meshed and transmitted through a gear rod 15.

[0078] Therefore, when the first transmission shaft 141 is driven to rotate, the fourth gear 142 and the sixth gear 143 can be driven to rotate at the same time. When the fourth gear 142 rotates, the fifth gear 171 meshing therewith can be driven to rotate, thereby realizing the rotation of the powder outlet screw 17 to achieve powder discharge. When the sixth gear 143 rotates, the gear rod 15 meshing therewith and the seventh gear 161 can be rotated to realize the rotation of the guide impeller 16.

[0079] Furthermore, the lower end of the first transmission shaft 141 is provided with a third transmission disc 144 that is transmission-matched with the second transmission member 22. Specifically, the second transmission member 22 includes a second transmission shaft 221, the upper end of the second transmission shaft 221 is provided with a fourth transmission disc 222 that is partially located in the material storage chamber 21, the third transmission disc 144 is provided with a plurality of slots 1441, and the fourth transmission disc 222 is provided with a plurality of claws 223 that are engaged with the plurality of slots 1441 to achieve transmission connection; the lower end of the second transmission shaft 221 is transmission-connected with the output shaft of the first driving device 25 through a shaft sleeve.

[0080] Therefore, when the first driving device 25 drives the second transmission shaft 221 to rotate, it can drive the fourth transmission plate 222 to rotate, and through the engagement of a plurality of claws 223 with a plurality of slots 1441, drive the third transmission plate 144 to rotate, thereby driving the first transmission shaft 141 to rotate.

[0081] Embodiment 2

[0082] See also Figure 9-12 The powder lowering sealing mechanism of the present invention is different from that of the first embodiment in that the structure of the sealing member is different. In the present embodiment, the sealing member is a third sealing cover plate 19 slidably disposed at the bottom of the sealing bottom cover 12, and the third sealing cover plate 19 can cover or expose the powder lowering port 121 to open or close the powder lowering port 121.

[0083] Specifically, the bottom of the sealed bottom cover 12 is provided with a slide groove for the third sealing cover plate 19 to slide, and the bottom surface of the slide groove forms a third sealing surface adapted to the top surface of the third sealing cover plate 19, and the powder drop port 121 is located on the third sealing surface; in this embodiment, the third sealing surface is a plane, and the top surface of the third sealing cover plate 19 is also a plane. The third transmission member is a transmission plate 28, and the top of the transmission plate 28 is provided with a second clamping block 281, and the bottom of the third sealing cover plate 19 is provided with a second clamping hole 191, and the second clamping block 281 is clamped into the second clamping hole 191 to achieve transmission connection; the output end of the second driving device 26 is transmission-connected with a third gear 29, and the transmission plate 28 is provided with a rack that meshes with the third gear 29 for transmission.

[0084] Therefore, when the second driving device 26 drives the third gear 29 to rotate, the meshing transmission between the second driving device 26 and the rack can drive the transmission plate 28 to slide, thereby driving the third sealing cover plate 19 to slide to open or close the powder drop port.

[0085] In the embodiment of the present invention, a sliding groove 271 is formed on the shell plate 27 for the transmission plate 28 to slide.

[0086] Embodiment 3

[0087] In addition, the present invention further provides a powder brewing machine, comprising the screw-type powder feeding sealing mechanism of the above-mentioned embodiment 1 or 2. In the embodiment of the present invention, the powder brewing machine is a milk powder brewing machine, and the powder storage box 11 stores milk powder inside. Of course, in other embodiments, the powder brewing machine can also be a coffee brewing machine, a soy milk brewing machine and other powdered beverage brewing equipment, as long as the brewing equipment involving powder brewing is within the protection scope of this application, and is not limited here.

[0088] In summary, the present invention provides a screw-type powder feeding sealing mechanism and a powder brewing machine, which have the following beneficial effects:

[0089] (I) The screw-type powder-discharging sealing mechanism of the present invention is provided with a sealing bottom cover 12 at the bottom of the guide tube 112, and a powder-discharging port 121 that overlaps and communicates with the powder outlet 1121 is provided on the sealing bottom cover 12, and a sealing member is movably provided at the bottom of the sealing bottom cover 12 to open or close the powder-discharging port 121. With such a configuration, by adopting a lower plane seal, not only can the opening angle of the powder outlet 1121 and the powder-discharging port 121 be set at 180 degrees, so that the powder discharging is smoother and powder blockage is not likely to occur; at the same time, its sealing performance is better, which can greatly reduce the risk of powder leakage. In addition, by separately providing a second drive device 26 on the body 2 to drive the seal to rotate, the overall structure of the powder box assembly 1 is simplified, making it easier to disassemble, wash and maintain, and at the same time, its transmission matching relationship is simpler, the matching accuracy requirement is lower, and the control logic is also simpler.

[0090] (ii) The screw-type powder discharging sealing mechanism of the present invention has a time dislocation between powder discharging and sealing. When making milk, the sealing member moves before the powder discharging screw 17 and opens the powder discharging port 121. When sealing, the sealing member moves after the powder discharging screw 17 to seal the powder discharging port 121. In this way, flying powder generated in the process of opening or sealing the powder discharging port 121 can be reduced, making the structure simpler and more reliable.

[0091] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0092] It should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0093] In addition, in the description of the present invention, “multiple” and “several” mean two or more than two, unless otherwise clearly and specifically defined.

[0094] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A screw-type powder feeding sealing mechanism, characterized in that: The invention comprises a machine body having a material storage cavity and a powder box assembly detachably placed in the material storage cavity, wherein: The powder box assembly comprises: (a) a powder storage box for storing powder; (b) a guide tube disposed at the bottom of the powder storage box, wherein a powder outlet is disposed at the lower portion of the guide tube, and a powder inlet communicated with the powder storage box is disposed at the upper portion of the guide tube; (c) a powder discharging screw disposed inside the guide tube, the powder discharging screw rotating to extrude powder from a powder discharging port of the guide tube; (d) a sealed bottom cover disposed at the bottom of the guide tube, wherein the sealed bottom cover is provided with a powder drop opening, and the powder drop opening coincides with and is in communication with the powder outlet of the guide tube; (e) a sealing member movably disposed at the bottom of the sealed bottom cover; (f) a first transmission member which is provided on the sealing bottom cover and is used to drive the powder discharging screw to rotate; In addition, it also includes a first driving device and a second driving device arranged in the machine body, the output end of the first driving device is connected to the second transmission member, the second transmission member is at least partially located in the material storage chamber and is used to cooperate with the first transmission member to drive the powder discharge screw to rotate; the output end of the second driving device is connected to the third transmission member, the third transmission member is at least partially located in the material storage chamber and is used to drive the sealing member to open or close the powder drop port; A controller is also arranged in the machine body, and controls the actions of the first driving device and the second driving device through electrical connection.

2. A screw-type powder feeding sealing mechanism according to claim 1, characterized in that: When powder needs to be discharged, the sealing member acts before the powder discharge screw to open the powder discharge port, and then the powder discharge screw rotates to discharge powder; when sealing is required, the powder discharge screw acts before the sealing member to stop powder discharge, and then the sealing member acts to close the powder discharge port.

3. A screw-type powder feeding sealing mechanism according to claim 1 or 2, characterized in that: The sealing member is a first sealing cover plate rotatably disposed at the bottom of the sealing bottom cover and coaxially disposed with the first transmission member, wherein: The first sealing cover plate comprises a first cover plate body and a first convex plate portion extending from the edge of the first cover plate body. When the first sealing cover plate is driven to rotate, the first convex plate portion can cover or expose the powder drop opening to close or open the powder drop opening. The bottom surface of the sealing bottom cover is formed with a first sealing surface adapted to the top surface of the first convex plate portion, and the powder drop opening is located on the first sealing surface. The third transmission member is a first transmission disk partially located in the storage cavity and transmission-connected to the first sealing cover plate, the output end of the second driving device is transmission-connected to the first gear, and the bottom of the first transmission disk is provided with a second gear meshing with the first gear.

4. A screw-type powder feeding sealing mechanism according to claim 1 or 2, characterized in that: The sealing member is a second sealing cover plate rotatably disposed at the bottom of the sealing bottom cover and non-coaxially disposed with the first transmission member, wherein: The second sealing cover plate comprises a second cover plate body and a second convex plate portion extending from the edge of the second cover plate body. When the second sealing cover plate is driven to rotate, the second convex plate portion can cover or expose the powder drop opening to close or open the powder drop opening. The bottom surface of the sealing bottom cover is formed with a second sealing surface adapted to the top surface of the second convex plate portion, and the powder drop opening is located on the second sealing surface. The third transmission member is a second transmission disk that is partially located in the material storage cavity and is respectively transmission-connected to the second sealing cover plate and the output end of the second driving device.

5. A screw-type powder feeding sealing mechanism according to claim 1 or 2, characterized in that: The sealing member is a third sealing cover plate slidably arranged at the bottom of the sealing bottom cover, and the third sealing cover plate can cover or expose the powder drop opening to realize opening or closing the powder drop opening, wherein: The bottom of the sealing bottom cover is provided with a slide groove for the third sealing cover plate to slide, the bottom surface of the slide groove forms a third sealing surface adapted to the top surface of the third sealing cover plate, and the powder drop port is located on the third sealing surface; The third transmission member is a transmission plate transmission-connected to the third sealing cover plate, the output end of the second driving device is transmission-connected to a third gear, and a rack meshing with the third gear is provided on the transmission plate.

6. A screw-type powder feeding sealing mechanism according to claim 1 or 2, characterized in that: A detachable inspection cover is provided at one end of the guide tube close to the powder outlet.

7. A screw-type powder feeding sealing mechanism according to claim 1 or 2, characterized in that: A rotatable material guide impeller is provided in the powder storage box, and the material guide impeller is used to drive the powder to rotate and enter the guide tube through the powder inlet on the guide tube; The powder discharging screw and the material guiding impeller are both transmission-connected to the first transmission member.

8. A screw-type powder feeding sealing mechanism according to claim 7, characterized in that: The first transmission member comprises a first transmission shaft passing through the sealed bottom cover, wherein: A fourth gear is provided at the upper end of the first transmission shaft, and a fifth gear meshing with the fourth gear is provided at one end of the powder discharge screw; A sixth gear is also provided at the upper end of the first transmission shaft, and a seventh gear is provided at the bottom of the guide impeller, and the sixth gear and the seventh gear are meshed and driven with each other via a gear rod; The lower end of the first transmission shaft is provided with a third transmission plate which is transmission-matched with the second transmission member.

9. A screw-type powder feeding sealing mechanism according to claim 8, characterized in that: The second transmission member comprises a second transmission shaft, wherein: A fourth transmission disc partially located in the material storage cavity is disposed at the upper end of the second transmission shaft, a plurality of slots are disposed on the third transmission disc, and a plurality of claws are disposed on the fourth transmission disc to engage with the plurality of slots to achieve transmission connection; The lower end of the second transmission shaft is drivingly connected to the output end of the first driving device.

10. A powder brewing machine, characterized in that: It comprises a screw-type powder feeding sealing mechanism as described in any one of claims 1 to 9.

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