Beverage brewing mechanism and beverage machine

Abstract

The application provides a beverage brewing mechanism and a beverage machine. The beverage brewing mechanism comprises a main support, a lower piston assembly arranged on the main support and having a powder receiving position and a brewing position, the lower piston assembly comprising a brewing cavity and a lower piston, the brewing cavity having opposite upper and lower cavity openings, and the lower piston extending into the brewing cavity from the lower cavity opening, an upper piston assembly arranged on the main support and having a standby position and a brewing position, the standby position being staggered with the powder receiving position, and a driving mechanism connected with the upper piston assembly and the lower piston assembly respectively, for driving the upper piston assembly and the lower piston assembly to rotate relative to the main support respectively, and for driving the upper piston of the upper piston assembly to extend into the brewing cavity through the upper cavity opening and for driving the lower piston to move upward. The application can set the powder falling opening lower, so that the lower piston assembly is closer to the powder falling opening when in the powder receiving position, and the problems of scattering and flying powder during the powder falling process, inaccurate powder adding, and influence on brewing taste and waste are avoided.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application belongs to the technical field of household appliances, and particularly relates to a beverage brewing mechanism and a beverage machine. BACKGROUND

[0002] At present, coffee machines on the market include semi-automatic coffee machines and full-automatic coffee machines. The semi-automatic coffee machine mainly performs powder grinding, leveling, powder pressing, and coffee extraction in sequence through the experience and operation method of a barista to obtain a cup of concentrated coffee with rich taste and full oil. However, the product quality is highly dependent on the experience of the barista and the adjustment of the machine; at the same time, the manual operation in sequence takes a long time and has low efficiency.

[0003] The full-automatic coffee machine can automatically complete the actions of powder grinding, powder pressing, extraction, and residue discharge. However, the brewing chamber and the powder falling port of the common full-automatic coffee machine on the market are far apart due to the space reserved for the brewing head, so that the coffee powder cannot accurately fall into the brewing chamber, the coffee powder flies, the coffee powder amount is inaccurate, the coffee taste is poor, and the whole machine size is large, which is not conducive to miniaturization. SUMMARY

[0004] In view of the above problems in the prior art, the embodiment of the present application provides a beverage brewing mechanism and a beverage machine.

[0005] To solve the above technical problems, the technical scheme adopted by the embodiment of the present application is:

[0006] A beverage brewing mechanism, comprising:

[0007] a main support;

[0008] a lower piston assembly arranged on the main support and capable of rotating relative to the main support, the lower piston assembly having a powder receiving position and a brewing position in the rotating direction thereof; the lower piston assembly comprises a brewing chamber and a lower piston, the brewing chamber has opposite upper and lower chamber openings, and the lower piston extends into the brewing chamber from the lower chamber opening;

[0009] an upper piston assembly arranged on the main support and capable of rotating relative to the main support, the upper piston assembly having a standby position and a brewing position in the rotating direction thereof, and the standby position is staggered with the powder receiving position;

[0010] a driving mechanism connected with the upper piston assembly and the lower piston assembly respectively, for driving the upper piston assembly and the lower piston assembly to rotate relative to the main support respectively, and for driving the upper piston of the upper piston assembly to extend into the brewing chamber through the upper chamber opening and for driving the lower piston to move upward to compact the powdery substance in the brewing chamber when the upper piston assembly and the lower piston assembly rotate to the respective brewing positions.

[0011] In an optional embodiment, the lower piston assembly further comprises a lower body, and the brewing chamber is arranged on the lower body and penetrates through the upper and lower ends of the lower body to form the upper chamber opening and the lower chamber opening respectively.

[0012] The driving mechanism comprises a power component and a transmission component, the power component is connected with the lower piston assembly through the transmission component, the transmission component comprises a lead screw, the lead screw is arranged in the lower body and connected with the lower piston, and the axis of the lead screw is parallel to the axis of the brewing chamber, the power component is used for driving the lead screw to drive the lower piston assembly to rotate synchronously, and driving the lead screw to drive the lower piston to move up and down in the brewing chamber when the lower piston assembly rotates to the brewing position. By means of the power component, the rotation of the lead screw and the axial movement of the lead screw can be driven, the rotation of the lower piston assembly and the up and down movement of the lower piston are realized, thus the structure can be simplified and the cost can be reduced.

[0013] In an optional embodiment, first and second horizontal grooves are arranged on the outer wall of the lead screw and spaced apart in the circumferential direction, first and second vertical grooves are arranged on the outer wall of the lead screw and spaced apart in the axial direction, and the first horizontal groove, the first vertical groove, the second horizontal groove and the second vertical groove are sequentially connected to form a closed channel.

[0014] The main support comprises a hollow shaft arranged vertically, the shaft is sleeved outside the lead screw, and a limiting pin is arranged on the shaft and located in the channel, when the limiting pin is located in the first horizontal groove or the second horizontal groove, the lead screw rotates under the driving action of the power component, and when the limiting pin is located in the first vertical groove or the second vertical groove, the lead screw moves up and down under the driving action of the power component. The structure is designed ingeniously and compactly, which is beneficial to realize the miniaturization of the beverage brewing mechanism.

[0015] In an optional embodiment, the lower piston assembly further comprises a swing arm, one end of the swing arm is fixedly connected with the lower end of the lead screw, and the other end of the swing arm is fixedly connected with the lower end of the lower piston. The synchronous movement of the lead screw and the lower piston is facilitated.

[0016] In an optional embodiment, the power component comprises a first motor.

[0017] When the first motor rotates in a first direction and the limit pin is located in the first transverse slot, the first motor drives the lead screw to rotate in the first direction, the lead screw drives the lower piston assembly to rotate, and when the lower piston assembly rotates to a brewing position, the limit pin moves to its second end in the first transverse slot, the first motor drives the lead screw to drive the lower piston to move upward in the brewing cavity, and at the same time, the limit pin moves upward in the first vertical slot.

[0018] When the first motor rotates in a second direction opposite to the first direction and the limit pin is located in the second transverse slot, the first motor drives the lead screw to rotate in the second direction opposite to the first direction, the lead screw drives the lower piston assembly to rotate, and when the lower piston assembly rotates to a powder receiving position, the limit pin moves to its second end in the second transverse slot, the first motor drives the lead screw to drive the lower piston to move downward in the brewing cavity, and at the same time, the limit pin moves downward in the second vertical slot. In this way, the operation and control of the whole machine are more convenient.

[0019] In an optional embodiment, the upper piston assembly further comprises an upper body, the upper body has a cavity therein, the upper body is provided with a first assembly hole and a second assembly hole penetrating through upper and lower ends of the upper body respectively, and the first assembly hole and the second assembly hole are in communication with the cavity respectively; the upper piston is arranged in the first assembly hole and both ends thereof are exposed to the first assembly hole, and the shaft is arranged in the second assembly hole and both ends thereof are exposed to the second assembly hole; and the power component drives the upper body to rotate around the shaft through the transmission component. The structure is compact and reasonable in design.

[0020] In an optional embodiment, an outer periphery of the upper piston rod part of the upper piston is provided with an external thread, an outer periphery of the upper piston rod part of the upper piston is provided with a guide groove extending in an axial direction thereof, a hole wall of the first assembly hole is provided with a convex rib extending in an axial direction thereof, the convex rib is arranged in the guide groove and slides along the guide groove when the upper piston moves up and down.

[0021] In an optional embodiment, the transmission component further comprises a first gear, a second gear, a third gear and a fourth gear, the first gear is threadedly connected to the lead screw, the second gear and the third gear are respectively sleeved on the shaft, the second gear and the third gear are fixed and capable of synchronously rotating, the third gear and the fourth gear are engaged and located in the cavity, and the fourth gear is threadedly connected to the external thread on the upper piston rod part of the upper piston.

[0022] The power component comprises a first motor and a second motor, a first output gear of the first motor is engaged with the first gear, and a second output gear of the second motor is engaged with the second gear. The above gears for driving the upper piston assembly and the lower piston assembly are integrated on a shaft rod which is sleeved on the lead screw, so that the whole driving component is compact in structure, the space occupancy is reduced, and the miniaturization of the whole machine is facilitated.

[0023] In an optional embodiment, a limiting structure is arranged on the main support, and when the upper piston assembly is rotated from the standby position to the brewing position, the limiting structure limits the continuous rotation of the upper piston assembly, so that the second motor drives the upper piston to move downward and extend into the brewing cavity through the second gear, the third gear and the fourth gear in sequence. The position of the upper piston assembly is facilitated to be controlled.

[0024] In an optional embodiment, a slag scraping baffle is arranged on the main support, and when the lower piston assembly is in the brewing position, the slag scraping baffle is located above the brewing cavity and is arranged around the outer periphery of the upper cavity opening, so that when the lower piston assembly is rotated from the brewing position to the powder receiving position after the slag cake is pushed out of the brewing cavity by the upward movement of the lower piston, the slag scraping baffle blocks the slag cake from rotating with the lower piston assembly. This slag discharging mode is more concise, the slag discharging is more thorough, and the cleanliness of the brewing cavity can be maintained.

[0025] In an optional embodiment, the first transverse groove and the second transverse groove are respectively semicircular ring grooves extending circumferentially around the outer periphery of the lead screw, the included angle between the brewing position and the standby position of the upper piston assembly is 90 degrees, the included angle between the brewing position and the powder receiving position of the lower piston assembly is 180 degrees, and when the upper piston assembly and the lower piston assembly are both in the brewing position, the upper piston assembly is located directly above the lower piston assembly. The layout is reasonable, the upper piston assembly and the lower piston assembly can be prevented from interfering with each other in the transverse space, and the powder falling opening can be arranged lower to facilitate powder receiving.

[0026] A beverage machine comprises a machine body and further comprises the beverage brewing mechanism in any of the above embodiments.

[0027] The beverage brewing mechanism in the embodiment of the present application can be used to set the powder falling opening lower, so that the lower piston assembly is closer to the powder falling opening when the lower piston assembly is in the powder receiving position, the coffee powder coming out of the powder falling opening can be accurately dropped into the brewing cavity, the scattering and flying of the coffee powder during the powder falling process can be avoided, the powder adding is accurate, the brewing taste is not affected, and the problem of waste is solved.

[0028] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to be restrictive of the application.

[0029] The summary of various implementations or examples of the technology described in this disclosure is not an extensive overview of the full scope of the technology disclosed, or all features of the technology. BRIEF DESCRIPTION OF DRAWINGS

[0030] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. The drawings are intended to illustrate various embodiments of the application, and are not intended to limit the application. Same reference numerals in different drawings can identify the same or similar elements.

[0031] Figure 1 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0032] Figure 2 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position. Figure 1 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0033] Figure 3 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0034] Figure 4 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0035] Figure 5 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position. Figure 6 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0036] Figure 7 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0037] Figure 8 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0038] Figure 9 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0039] Figure 10 Schematic diagram of the perspective structure of the beverage brewing mechanism of the embodiment of the present application, wherein the upper piston assembly is in the standby position and the lower piston assembly is in the powder receiving position.

[0040] Figure 11Figure 1 is a top view of the beverage brewing mechanism of the present application, showing the positional relationship between the standby position, the brewing position and the powder receiving position.

[0041] Figure 12 Figure 2 is a perspective view of the beverage brewing mechanism of the present application in the brewing state, in which the upper piston assembly in the standby position is virtually shown by dotted lines.

[0042] Figure 13 Figure 3 is a perspective view of the beverage brewing mechanism of the present application after the brewing is completed, in which the lower piston assembly in the brewing position is virtually shown by dotted lines.

[0043] Figure 14 Figure 4 is a perspective view of the beverage brewing mechanism of the present application in the powder loading state.

[0044] Figure 15 Figure 5 is a sectional view of the beverage brewing mechanism of the present application in the powder loading state.

[0045] Figure 16 Figure 6 is a sectional view of the beverage brewing mechanism of the present application in the brewing state.

[0046] Figure 17 Figure 7 is a sectional view of the beverage brewing mechanism of the present application in the powder unloading state.

[0047] Reference signs:

[0048] 1 - main support; 11 - shaft; 111 - limiting pin; 12 - upper frame body; 13 - lower frame body; 14 - residue scraping baffle;

[0049] 2 - lower piston assembly; 21 - lower piston; 211 - lower piston head; 212 - lower piston rod; 22 - lower main body; 221 - brewing cavity; 222 - upper cavity opening; 23 - swing arm; 231 - water injection opening;

[0050] 3 - upper piston assembly; 31 - upper piston; 311 - upper piston rod; 312 - upper piston head; 313 - end cover; 314 - water outlet; 315 - guide groove; 32 - upper main body; 321 - convex rib; 322 - cavity; 323 - first assembly hole; 324 - second assembly hole;

[0051] 4 - driving mechanism; 41 - screw rod; 411 - first transverse groove; 412 - second transverse groove; 413 - first vertical groove; 414 - second vertical groove; 42 - first motor; 421 - first output gear; 43 - second motor; 431 - second output gear; 44 - first gear; 45 - second gear; 46 - third gear; 47 - fourth gear; 48 - first intermediate gear; 49 - second intermediate gear;

[0052] A - Standby position; B - Powder receiving position; C - Brewing position; D - Dreg cake. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0054] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning understood by one of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms are used herein to distinguish one element from another, but do not necessarily require or imply these elements to be in any particular sequence or order, or one of more importance. The terms "comprises", "comprising", "includes", "including" and the like can be used herein to indicate that an element or object possess the named attribute or attributes, but do not exclude the presence of other elements or objects. The term "connected" or "coupled" or similar terms can not necessarily mean that two elements are directly connected or coupled together, but can also include the case where intervening elements can be present. The terms "upper", "lower", "left", "right", and the like are used herein for ease of description to indicate relative positions on an object or to indicate relative positions of objects, and can change accordingly when the absolute positions of the described objects change.

[0055] In order to keep the following description of the embodiments of the present application clear and brief, the present application omits the detailed description of known functions and known components.

[0056] Reference is made to Figures 1 to 17 As shown in the drawings, the embodiments of the present application provide a beverage brewing mechanism, which can be applied to a beverage machine such as a coffee machine. The beverage brewing mechanism comprises a main support 1, a lower piston assembly 2, an upper piston assembly 3 and a driving mechanism.

[0057] The lower piston assembly 2 is arranged on the main support 1 and can rotate relative to the main support 1. The lower piston assembly 2 has a powder receiving position B and a brewing position C in the rotating direction. The lower piston assembly 2 comprises a brewing cavity 221 and a lower piston 21. The brewing cavity 221 has opposite upper cavity openings 222 and lower cavity openings (not shown, which are blocked by the lower piston 21). The lower piston 21 extends into the brewing cavity 221 from the lower cavity openings.

[0058] The upper piston assembly 3 is arranged on the main support 1 and can rotate relative to the main support 1. The upper piston assembly 3 has a standby position A and a brewing position C in the rotating direction. The standby position A of the upper piston assembly 3 is misaligned with the powder receiving position B of the lower piston assembly 2, seeFigure 1 The upper piston assembly 3 is in the standby position A, and the lower piston assembly 2 is in the powder receiving position B. The upper piston assembly 3 avoids the powder receiving position B of the lower piston assembly 2, and the powder falling port of the powder cavity for adding the powdery substance into the brewing cavity 221 of the lower piston assembly 2 can be arranged closer to the brewing cavity 221.

[0059] The driving mechanism is connected with the upper piston assembly 3 and the lower piston assembly 2 respectively, and is used for driving the upper piston assembly 3 and the lower piston assembly 2 to rotate relative to the main support 1 respectively, so as to switch the upper piston assembly 3 between the brewing position C and the standby position A, and switch the lower piston assembly 2 between the brewing position C and the powder receiving position B. When the upper piston assembly 3 and the lower piston assembly 2 rotate to the respective brewing position C, the driving mechanism is also used for driving the upper piston 31 in the upper piston assembly 3 to extend into the brewing cavity 221 through the upper cavity port 222, and driving the lower piston 21 to move upward to cooperate with the upper piston 31 to compact the powdery substance (including various powders that can be brewed into drinks, such as coffee powder, etc. Hereinafter, the coffee powder is taken as an example for description) in the brewing cavity 221.

[0060] The beverage brewing mechanism of the embodiment of the present application is characterized in that the upper piston assembly 3 and the lower piston assembly 2 are both arranged in a form capable of rotating relative to the main support 1, and the standby position A of the upper piston assembly 3 is dislocated from the powder receiving position B of the lower piston assembly 2. In this way, the powder falling port can be arranged lower, so that the lower piston assembly 2 is closer to the powder falling port when it is in the powder receiving position B. The coffee powder coming out of the powder falling port can be accurately dropped into the brewing cavity 221, and the problems of scattering and flying of the coffee powder during the powder falling process, inaccurate powder adding, and influence on the brewing taste and waste can be avoided.

[0061] Cooperation Figure 3 And Figure 4 As shown in the figure, in some embodiments, the lower piston assembly 2 further includes a lower body 22, and the brewing cavity 221 is arranged on the lower body 22 and penetrates through the upper and lower ends of the lower body 22 to form the upper cavity port 222 and the lower cavity port respectively.

[0062] The driving mechanism includes a power component and a transmission component. The power component is connected with the lower piston assembly 2 through the transmission component, and is used for driving the lower piston assembly 2 to rotate relative to the main support 1. Specifically, the power component is further connected with the lower piston assembly 2 through the transmission component. Figure 3 And Figure 4The transmission component includes a screw rod 41 which is arranged in the lower body 22 and connected with the lower piston 21. The axis of the screw rod 41 is parallel to the axis of the brewing cavity 221. The power component is used to drive the screw rod 41 to drive the lower piston assembly 2 to rotate synchronously, and when the lower piston assembly 2 rotates to the brewing position C, the power component drives the screw rod 41 to drive the lower piston 21 to move up and down in the brewing cavity 221. By means of the power component, the screw rod 41 can be driven to rotate and to move axially, the lower piston assembly 2 is driven to rotate simultaneously by the rotation of the screw rod 41, so as to switch the lower piston assembly 2 between the brewing position C and the powder receiving position B, and the lower piston 21 in the lower piston assembly 2 is driven to move by the axial movement of the screw rod 41, so as to press the powder before brewing and push the residue after brewing.

[0063] In some embodiments, as shown in Figures 3 to 6 , the outer wall of the screw rod 41 is spaced apart around the circumference thereof and is provided with a first transverse groove 411 and a second transverse groove 412, and the outer wall of the screw rod 41 is spaced apart along the axis thereof and is provided with a first vertical groove 413 and a second vertical groove 414, and the first transverse groove 411, the first vertical groove 413, the second transverse groove 412 and the second vertical groove 414 are sequentially connected to form a closed channel.

[0064] As shown in Figure 7 , the main support 1 includes a hollow shaft 11 which is arranged vertically. The shaft 11 is sleeved on the outer wall of the screw rod 41, and the shaft 11 is provided with a limiting pin 111 which is arranged in the channel (see Figure 3 and Figure 4 ). When the limiting pin 111 is arranged in the first transverse groove 411 or the second transverse groove 412, the screw rod 41 is driven by the power component to rotate, and when the limiting pin 111 is arranged in the first vertical groove 413 or the second vertical groove 414, the screw rod 41 is driven by the power component to move up and down. That is, when the limiting pin 111 is arranged in the transverse groove, the limiting pin 111 will limit the screw rod 41 so that it cannot move up and down along the axis thereof but can only rotate under the driving of the power component; when the limiting pin 111 is arranged in the vertical groove, the limiting pin 111 will limit the screw rod 41 so that it cannot rotate but can only move up and down along the axis thereof under the driving of the power component. In this way, under the cooperation of the limiting pin 111 and the channel, the power component can drive the screw rod 41 to drive the lower piston assembly 2 to rotate and to move up and down. The structure design is ingenious, simple and compact, and is beneficial to realize the miniaturization of the beverage brewing mechanism.

[0065] In some embodiments, continuing to combine Figures 3 to 6The lower piston assembly 2 further comprises a swing arm 23. One end of the swing arm 23 is fixedly connected with the lower end of the screw rod 41, and the other end of the swing arm 23 is fixedly connected with the lower end of the lower piston 21. In this way, when the screw rod 41 moves up and down under the driving action of the power component, the lower piston 21 will move up and down together with the screw rod 41. When the lower piston assembly 2 is in the brewing position C, the lower piston 21 moves up in the brewing cavity 221 under the driving of the screw rod 41 to press the coffee powder, so as to realize the powder pressing, and after the brewing is completed, the lower piston 21 continues to move up to the highest position to push the formed dregs D out of the brewing cavity 221 through the upper cavity opening 222; and when the lower piston assembly 2 is in the powder receiving position B, the lower piston 21 moves down to the lowest position under the driving of the screw rod 41, so as to receive the powder. Meanwhile, when the screw rod 41 rotates under the driving action of the power component, the swing arm 23 can also pull the lower piston 21 and the lower main body 22 to rotate together, so as to improve the stability of rotation.

[0066] As shown in Figure 8 , the power component comprises a first motor 42. When the first motor 42 rotates in a first direction and the limit pin 111 is located in the first transverse groove 411, the first motor 42 drives the screw rod 41 to rotate in the first direction, the screw rod 41 drives the lower piston assembly 2 to rotate, and when the lower piston assembly 2 rotates to the brewing position C, the limit pin 111 moves to the second end of the first transverse groove 411, the first motor 42 drives the screw rod 41 to drive the lower piston 21 to move up in the brewing cavity 221, and at the same time, the limit pin 111 moves up in the first vertical groove 413. When the first motor 42 rotates in a second direction opposite to the first direction and the limit pin 111 is located in the second transverse groove 412, the first motor 42 drives the screw rod 41 to rotate in the second direction opposite to the first direction, the screw rod 41 drives the lower piston assembly 2 to rotate, and when the lower piston assembly 2 rotates to the powder receiving position B, the limit pin 111 moves to the second end of the second transverse groove 412, the first motor 42 drives the screw rod 41 to drive the lower piston 21 to move down in the brewing cavity 221, and at the same time, the limit pin 111 moves down in the second vertical groove 414. The length of the transverse groove and the length of the vertical groove are combined with the rotating stroke of the lower piston assembly 2, so as to realize the reasonable control of the rotation of the lower piston assembly 2 and the lifting of the lower piston 21, and the operation and control of the whole mechanism are more convenient.

[0067] Optionally, the first direction can be the clockwise direction or the counterclockwise direction, and the second direction is the counterclockwise direction or the clockwise direction opposite to the first direction.

[0068] As shown in Figures 3 to 6As shown, the lower piston 21 comprises a lower piston head 211 and a lower piston rod 212, the lower piston head 211 is fixed to the upper end of the lower piston rod 212, the lower piston head 211 is arranged in the brewing cavity 221, and the outer circumferential surface of the lower piston head 211 is sealingly attached to the cavity wall of the brewing cavity 221. The lower end of the lower piston rod 212 is fixed to the swing arm 23. The stroke of the lower piston 21 is determined by the length of the first vertical slot 413 and the second vertical slot 414. When the lower piston 21 moves to the highest position, i.e. the lower piston head 211 rises to the same level as the upper cavity opening 222 (see Figure 17 ), the limit pin 111 moves to the bottom end of the vertical slot, and when the lower piston head 211 descends to the same level as the lower cavity opening (see Figure 3 ), the limit pin 111 moves to the top end of the vertical slot.

[0069] In some embodiments, as shown in Figures 1 to 4 and Figure 10 , the upper piston assembly 3 further comprises an upper body 32, the upper body 32 has a chamber 322 therein, the upper body 32 is provided with a first assembly hole 323 and a second assembly hole 324 which pass through the upper and lower ends of the upper body 32 respectively, and the first assembly hole 323 and the second assembly hole 324 are in communication with the chamber 322. The upper piston 31 is mounted in the first assembly hole 323 with both ends exposed outside the first assembly hole 323, and the shaft 11 is mounted in the second assembly hole 324 with both ends exposed outside the second assembly hole 324; the power component drives the upper body 32 to rotate around the shaft 11 through the transmission component. The upper body 32 of the upper piston assembly 3 is sleeved on the shaft 11 through the second assembly hole 324, and when the power component is in action, the upper piston assembly 3 can rotate around the shaft 11, so that the upper piston assembly 3 can be switched between the standby position A and the brewing position C. The structure is compact and the design is reasonable.

[0070] Continuing to combine Figure 10 , the outer circumferential surface of the upper piston rod 311 of the upper piston 31 is provided with external threads, the outer circumferential surface of the upper piston rod 311 of the upper piston 31 is provided with a guide groove 315 extending in the axial direction thereof, the hole wall of the first assembly hole 323 is provided with a protruding rib 321 extending in the axial direction thereof, and the protruding rib 321 is arranged in the guide groove 315 to limit the relative rotation between the upper piston rod 311 and the upper body 32. In this way, in fact, the upper piston rod 311 is designed in the form of a screw rod 41 and integrated into the upper piston assembly 3, realizing the lifting (up and down movement) of the upper piston 31 and realizing the powder pressing, which is beneficial to further simplify the structure.

[0071] In some embodiments, as shown in Figure 3 , Figure 4 , Figure 8 and Figure 9As shown, the transmission component further comprises a first gear 44, a second gear 45, a third gear 46 and a fourth gear 47, the first gear 44 is threadedly connected to the lead screw 41, the second gear 45 and the third gear 46 are respectively sleeved on the shaft 11, and the second gear 45 is fixed and capable of synchronously rotating with the third gear 46, the third gear 46 and the fourth gear 47 are engaged and are both arranged in the cavity 322, and the fourth gear 47 is threadedly connected with the external thread on the upper piston rod part 311 of the upper piston 31. The power component further comprises a second motor 43, and the first output gear 421 of the first motor 42 is engaged with the first gear 44; the second output gear 431 of the second motor 43 is engaged with the second gear 45.

[0072] Optionally, in order to meet the need of space layout, a first intermediate gear 48 can be additionally arranged between the first output gear 421 and the first gear 44, the first output gear 421 is engaged with the first intermediate gear 48, and the first intermediate gear 48 is engaged with the first gear 44.

[0073] Optionally, in order to meet the need of space layout, a second intermediate gear 49 can be additionally arranged between the second output gear 431 and the second gear 45, the second output gear 431 is engaged with the second intermediate gear 49, and the second intermediate gear 49 is engaged with the second gear 45.

[0074] The second gear 45 and the third gear 46 can be a double gear of integral structure, or can be two independent gears, and the two independent gears are fixed by butt joint slots so as to synchronously rotate.

[0075] When the first motor 42 is started, the first gear 44 is driven to rotate by the first output gear 421, and the lead screw 41 is driven to move up and down or rotate by the first gear 44. When the second motor 43 is started, the second gear 45 is driven to rotate by the second output gear 431, and the third gear 46 is driven to rotate with the second gear 45. Since the fourth gear 47 is engaged with the third gear 46, the second motor 43 drives the upper body 32 to rotate around the shaft 11 through the transmission component under the condition that the upper body 32 is not limited, and the second motor 43 drives the fourth gear 47 to rotate through the second output gear 431, the second gear 45 and the third gear 46 in sequence under the condition that the rotation of the upper body 32 is limited, and the fourth gear 47 drives the upper piston rod part 311 to move up and down.

[0076] The above gears for driving the upper piston assembly 3 and the lower piston assembly 2 are integrated on the shaft 11, and the shaft 11 is sleeved on the lead screw 41, so that the whole transmission component is compact in structure, the space occupancy is reduced, and the miniaturization of the whole machine is facilitated.

[0077] In some embodiments, a limiting structure can be provided on the main support 1, which limits the rotation of the upper piston assembly 3 when the upper piston assembly 3 is rotated from the standby position A to the brewing position C, so that the second motor 43 drives the upper piston 31 to move downward through the second gear 45, the third gear 46 and the fourth gear 47 in sequence, and the upper piston 31 extends into the brewing chamber 221 to cooperate with the lower piston 21 of the lower piston assembly 2 to press the powder.

[0078] As shown in Figure 7 , the main support 1 includes an upper support body 12 and a lower support body 13 in addition to the shaft 11, and the upper and lower ends of the shaft 11 are fixed to the upper support body 12 and the lower support body 13, respectively. The limiting structure can be formed on the periphery of the upper support body 12, which blocks the rotation of the upper piston assembly 3 after it is rotated to the brewing position C, so that it cannot continue to rotate. Similarly, the periphery of the upper support body 12 can also form a limiting structure that blocks the rotation of the upper piston assembly 3 to the standby position A. By forming a blocking limiting structure on the periphery of the upper support body 12 to limit the rotation of the upper piston assembly 3, the method is simple, the control is accurate, and it is easy to implement and has a lower cost.

[0079] Continuing to combine Figure 3 , Figure 4 and Figure 10 , the lower end of the upper piston rod portion 311 is connected to the upper piston head portion 312, and the upper end of the upper piston rod portion 311 is connected to the end cover 313. The travel of the upper piston 31 in the upward and downward directions is defined by the upper piston head portion 312 and the end cover 313, i.e., when the upper piston 31 moves downward until the end cover 313 abuts against the upper end surface of the upper body 32, the upper piston 31 stops moving downward, and when the upper piston 31 moves upward until the upper piston head portion 312 abuts against the lower end surface of the upper body 32, the upper piston 31 stops moving upward.

[0080] In some embodiments, as shown in Figures 12 to 14 , a slag scraping baffle 14 is provided on the main support 1; when the lower piston assembly 2 is in the brewing position C, the slag scraping baffle 14 is located above the brewing chamber 221 and is arranged around (at least around part of the outer periphery of) the outer periphery of the upper cavity opening 222, so that after the slag cake D is pushed out of the brewing chamber 221 by the upward movement of the lower piston 21, the slag scraping baffle 14 will block the slag cake D (see Figure 13 ) and limit the rotation of the slag cake D with the lower piston assembly 2, and when the lower piston assembly 2 rotates away from the brewing position C, the slag cake D falls downward under its own gravity due to the support from below (see Figure 14 ) by the lower piston assembly 2. This slag removal method is more concise, the slag removal is more complete, and the brewing chamber 221 can be kept clean.

[0081] Optionally, as shown in Figure 13 and Figure 14As shown, the slag scraping baffle 14 can have an arc-shaped groove matching the shape of the slag cake D so as to wrap the slag cake D and form a better blockage.

[0082] Optionally, as shown in Figure 5 and Figure 6 , the first lateral groove 411 and the second lateral groove 412 are respectively a semicircular ring groove extending circumferentially around the outer periphery of the lead screw 41, that is, the rotation angle of the lead screw 41 is 180 degrees, and the rotation angle range of the lower piston assembly 2 driven by the lead screw 41 is also 180 degrees, so the included angle between the brewing position C of the lower piston assembly 2 and the powder receiving position B is 180 degrees. The included angle between the brewing position C of the upper piston assembly 3 and the standby position A is 90 degrees. When the upper piston assembly 3 and the lower piston assembly 2 are both in the brewing position C, the upper piston assembly 3 is located directly above the lower piston assembly 2. In this way, the standby position A, the powder receiving position B and the brewing position C can be staggered with each other, avoiding the interference between the upper piston assembly 3 and the lower piston assembly 2 in the lateral space. In addition, the powder falling port position can be set lower without affecting the rotation of the upper piston assembly 3, and the upper piston assembly 3 will not hinder the setting of the powder falling port, so that the coffee powder falling from the powder falling port can all enter the brewing chamber 221, facilitating the accuracy of controlling the amount of powder and ensuring the brewing taste.

[0083] In the initial state, the upper piston assembly 3 is kept in the standby position A, and the upper piston 31 is in the high position; the lower piston assembly 2 is in the powder receiving position B (see Figure 1 ), and the lower piston 21 is in the lowest position, and the limit pin 111 is located at the intersection of the first lateral groove 411 and the second vertical groove 414 (that is, the first end of the first lateral groove 411, see Figure 3 ). Figure 15

[0084] ​When the powder is filled and closed, the first motor 42 is started, the first output gear 421 on the first motor 42 drives the first gear 44 to rotate clockwise through the intermediate gear, since the limiting pin 111 is located in the first horizontal groove 411, the first gear 44 can drive the lead screw 41 to rotate clockwise when the first gear 44 rotates, the lead screw 41 drives the lower piston assembly 2 to rotate clockwise, when the lower piston assembly 2 rotates to the brewing position C, the limiting pin 111 moves to the second end of the first horizontal groove 411 (that is, the intersection of the first horizontal groove 411 and the first vertical groove 413), the limiting pin 111 limits the rotation of the lead screw 41, under the driving action of the first motor 42, the lead screw 41 can only move upward, at the same time, the limiting pin 111 moves downward along the first vertical groove 413, the lead screw 41 drives the lower piston 21 to move upward in the brewing cavity 221; at the same time, the second motor 43 is started, the upper piston assembly 3 rotates clockwise under the driving action of the second motor 43, from the standby position A to the brewing position C, the upper piston assembly 3 is located directly above the lower piston assembly 2, when the upper piston assembly 3 rotates to the brewing position C, the upper piston assembly 3 cannot continue to rotate due to the limitation of the limiting structure, under the driving action of the second motor 43, the upper piston 31 descends and enters the brewing cavity 221, closes the upper cavity opening 222 of the brewing cavity 221, and cooperates with the lower piston 21 to compact the coffee powder in the brewing cavity 221 (see Figure 16 ). Hot water is injected into the brewing cavity 221 from the water injection opening 231 on the swing arm 23, and the coffee powder in the brewing cavity 221 is extracted, during the extraction process, the limiting pin 111 remains in the first vertical groove 413 of the lead screw 41, the rotation of the lead screw 41 is limited, the first gear 44 drives the lead screw 41 to maintain the upward movement trend under the driving action of the first motor 42, and drives the lower piston 21 to maintain the upward extrusion of the coffee powder. The extraction liquid flows out from the water outlet opening 314 position of the upper piston rod portion 311, that is, the coffee extraction is completed, see Figure 16 .

[0085] After the extraction is completed, the second motor 43 is started again, since the upper piston assembly 3 is stopped by the upper frame body 12, the rotation is limited, the upper piston 31 moves upward to the highest point under the joint action of the second motor 43, the second gear 45, the third gear 46 and the fourth gear 47, when the second motor 43 rotates counterclockwise, it is out of the limitation of the upper frame body 12, the limitation of the rotation of the upper piston assembly 3 is removed, the upper piston assembly 3 swings (that is, rotates) to the standby position A under the driving of the second motor 43 and the transmission member, to leave the space for discharging the residue, see Figure 12 , in order to clearly understand the swing of the upper piston assembly 3, Figure 12 not only shows the upper piston assembly 3 located at the brewing position C, but also shows the upper piston assembly 3 swinging to the standby position A with a dashed line.

[0086] At this time, the limiting pin 111 is still kept in the first vertical slot 413, and the rotation of the lead screw 41 is limited. Under the action of the first motor 42, the first gear 44 rotates counterclockwise to drive the lead screw 41 to move upward. Since the upper piston 31 is withdrawn from the brewing cavity 221, the downward force applied to the coffee residue (cake D) after extraction disappears, and the lower piston 21 is driven by the lead screw 41 to push the cake D upward until the upper surface of the lower piston 21 is flush with the upper cavity opening 222 of the brewing cavity 221, and the cake D is pushed out of the upper cavity opening 222 of the brewing cavity 221, see Figure 13 and Figure 17 At this time, the limiting pin 111 moves to the intersection of the first vertical slot 413 and the second horizontal slot 412 (i.e., the first end of the second horizontal slot 412), and the upward movement of the lead screw 41 is limited. When the first motor 42 drives the first gear 44 to rotate counterclockwise, the lead screw 41 will rotate counterclockwise together with the lower piston assembly 2. When the lower piston assembly 2 rotates to the powder receiving position B, the limiting pin 111 moves to the second end of the second horizontal slot 412, and the rotation of the lead screw 41 is limited, so that the lower piston assembly 2 stops rotating and remains at the powder receiving position B. The lead screw 41 is driven by the first gear 44 to move downward together with the lower piston 21 to the lowest position, and the limiting pin 111 also moves upward along the second vertical slot 414 to the intersection of the second vertical slot 414 and the first horizontal slot 411 (the first end of the first horizontal slot 411), waiting for the next brewing.

[0087] It can be understood that, since the shaft 11 is fixed and the limiting pin 111 is fixed on the shaft 11, the limiting pin 111 is fixed relative to the shaft 11. The movement of the limiting pin 111 claimed above is relative to the lead screw 41.

[0088] The embodiment of the present application also provides a tea making machine, which comprises a machine body and a beverage brewing mechanism as claimed in any of the above embodiments arranged on the machine body. The tea making machine may, for example, be a coffee machine, which may, for example, further comprise a bean grinding mechanism, a water supply mechanism, a residue receiving mechanism, a controller, etc. Since the beverage brewing mechanism has a compact structure and small size and is accurate in powder receiving, the beverage machine using the beverage brewing mechanism also has the above advantages.

[0089] The above description is intended to be illustrative and not restrictive, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more aspects thereof) can be used in combination with each other, and the embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A beverage brewing mechanism, characterized by, The application relates to a coffee machine, which comprises the following parts: a main support (1); a lower piston assembly (2) arranged on the main support (1) and capable of rotating relative to the main support (1), the lower piston assembly (2) having a powder receiving position and a brewing position in the rotating direction, the lower piston assembly (2) comprising a brewing cavity (221) having opposite upper and lower cavity openings and a lower piston (21) extending into the brewing cavity (221) through the lower cavity opening; an upper piston assembly (3) arranged on the main support (1) and capable of rotating relative to the main support (1), the upper piston assembly (3) having a standby position and a brewing position in the rotating direction, and the standby position being staggered with the powder receiving position; a driving mechanism connected with the upper piston assembly (3) and the lower piston assembly (2) respectively, used for driving the upper piston assembly (3) and the lower piston assembly (2) to rotate relative to the main support (1) respectively, and when the upper piston assembly (3) and the lower piston assembly (2) rotate to the brewing position respectively, the driving mechanism is also used for driving an upper piston (31) of the upper piston assembly (3) to extend into the brewing cavity (221) through the upper cavity opening (222), and driving the lower piston (21) to move upward to cooperate with the upper piston (31) to compact the powdery substance in the brewing cavity (221); the lower piston assembly (2) further comprises a lower main body (22), the driving mechanism comprises a power component and a transmission component, the transmission component comprises a screw rod (41), the screw rod (41) is arranged in the lower main body (22) and connected with the lower piston (21), and the axis of the screw rod (41) is parallel to the axis of the brewing cavity (221), the power component is used for driving the screw rod (41) to drive the lower piston assembly (2) to rotate synchronously, and when the lower piston assembly (2) rotates to the brewing position, the power component is used for driving the screw rod (41) to drive the lower piston (21) to move up and down in the brewing cavity (221); first and second transverse grooves (411 and 412) are arranged on the outer wall of the screw rod (41) and spaced apart in the circumferential direction, first and second vertical grooves (413 and 414) are arranged on the outer wall of the screw rod (41) and spaced apart in the axial direction, and the first transverse groove (411), the first vertical groove (413), the second transverse groove (412) and the second vertical groove (414) are sequentially connected in a closed groove. The main support (1) comprises a vertically arranged hollow shaft (11) sleeved on the lead screw (41), the shaft (11) is provided with a limiting pin (111) located in the channel, when the limiting pin (111) is located in the first transverse groove (411) or the second transverse groove (412), the lead screw (41) rotates under the driving action of the power component, when the limiting pin (111) is located in the first vertical groove (413) or the second vertical groove (414), the lead screw (41) moves up and down under the driving action of the power component.

2. The beverage brewing mechanism of claim 1, wherein, The brewing cavity (221) is arranged on the lower main body (22) and penetrates through the upper and lower ends of the lower main body (22) to form the upper cavity opening (222) and the lower cavity opening respectively; The power component is connected with the lower piston assembly (2) through the transmission component.

3. The beverage brewing mechanism of claim 1, wherein, The lower piston assembly (2) further comprises a swing arm (23), one end of the swing arm (23) is fixedly connected with the lower end of the lead screw (41), and the other end of the swing arm (23) is fixedly connected with the lower end of the lower piston (21).

4. The beverage brewing mechanism of claim 1, wherein, The power component comprises a first motor (42); When the first motor (42) rotates in a first direction and the limiting pin (111) is located in the first transverse groove (411), the first motor (42) drives the lead screw (41) to rotate in the first direction, the lead screw (41) drives the lower piston assembly (2) to rotate, and when the lower piston assembly (2) rotates to a brewing position, the limiting pin (111) moves to the second end of the first transverse groove (411), the first motor (42) drives the lead screw (41) to drive the lower piston (21) to move upward in the brewing cavity (221), and the limiting pin (111) moves upward in the first vertical groove (413); When the first motor (42) rotates in a second direction opposite to the first direction and the limiting pin (111) is located in the second transverse groove (412), the first motor (42) drives the lead screw (41) to rotate in the second direction opposite to the first direction, the lead screw (41) drives the lower piston assembly (2) to rotate, and when the lower piston assembly (2) rotates to a powder receiving position, the limiting pin (111) moves to the second end of the second transverse groove (412), the first motor (42) drives the lead screw (41) to drive the lower piston (21) to move downward in the brewing cavity (221), and the limiting pin (111) moves downward in the second vertical groove (414).

5. The beverage brewing mechanism of claim 1, wherein, The upper piston assembly (3) further comprises an upper body (32) having a cavity (322) therein, the upper body (32) is provided with a first assembly hole (323) and a second assembly hole (324) penetrating through upper and lower ends of the upper body (32) respectively, the first assembly hole (323) and the second assembly hole (324) are in communication with the cavity (322) respectively; the upper piston (31) is installed in the first assembly hole (323) and the both ends thereof are exposed outside the first assembly hole (323), the shaft rod (11) is installed in the second assembly hole (324) and the both ends thereof are exposed outside the second assembly hole (324); the power component drives the upper body (32) to rotate around the shaft rod (11) through the transmission component.

6. The beverage brewing mechanism of claim 5, wherein, The outer periphery of the upper piston rod part (311) of the upper piston (31) is provided with external threads, the outer periphery of the upper piston rod part (311) of the upper piston (31) is provided with a guide groove (315) extending along the axial direction thereof, the hole wall of the first assembly hole (323) is provided with a convex rib (321) extending along the axial direction thereof, the convex rib (321) is arranged in the guide groove (315) and slides along the guide groove (315) when the upper piston (31) moves up and down.

7. The beverage brewing mechanism of claim 6, wherein, The transmission component further comprises a first gear (44), a second gear (45), a third gear (46) and a fourth gear (47), the first gear (44) is threadedly connected to the screw rod (41), the second gear (45) and the third gear (46) are respectively sleeved on the shaft rod (11), the second gear (45) and the third gear (46) are fixed and can synchronously rotate, the third gear (46) and the fourth gear (47) are engaged and are both located in the cavity (322), the fourth gear (47) is threadedly connected with the external threads on the upper piston rod part (311) of the upper piston (31); The power component comprises a first motor (42) and a second motor (43), a first output gear (421) of the first motor (42) is engaged with the first gear (44); a second output gear (431) of the second motor (43) is engaged with the second gear (45).

8. The beverage brewing mechanism of claim 7, wherein, The main support (1) is provided with a limiting structure, when the upper piston assembly (3) is rotated from the standby position to the brewing position, the limiting structure limits the upper piston assembly (3) from continuing to rotate, so that the second motor (43) drives the upper piston (31) to move downward and extend into the brewing cavity (221) through the second gear (45), the third gear (46) and the fourth gear (47) in sequence.

9. The beverage brewing mechanism of claim 7, wherein, The main support (1) is provided with a slag scraping baffle (14); when the lower piston assembly (2) is in the brewing position, the slag scraping baffle (14) is located above the brewing cavity (221) and is arranged around the outer periphery of the upper cavity opening (222) so as to block the slag cake from rotating with the lower piston assembly (2) when the lower piston assembly (2) rotates from the brewing position to the powder receiving position after the slag cake is pushed out of the brewing cavity (221) by the upward movement of the lower piston (21).

10. The beverage brewing mechanism of claim 1, wherein, The first transverse groove (411) and the second transverse groove (412) are respectively semicircular ring grooves extending circumferentially around the outer periphery of the lead screw (41); the included angle between the brewing position and the standby position of the upper piston assembly (3) is 90 degrees, the included angle between the brewing position and the powder receiving position of the lower piston assembly (2) is 180 degrees, and when the upper piston assembly (3) and the lower piston assembly (2) are both in the brewing position, the upper piston assembly (3) is located directly above the lower piston assembly (2).

11. A drinks machine comprising a machine body, characterised in that, Also included is the beverage brewing mechanism of any one of claims 1 to 10 arranged on the machine body.

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