Brewing device of coffee machine

Abstract

The utility model discloses a brewing device of a coffee machine. The brewing device comprises a coffee machine body, an upper extraction mechanism, a lower extraction mechanism, an upper extraction driving assembly, a lower extraction driving assembly and a cleaning mechanism. The coffee machine body comprises a mounting rack and a brewing machine body arranged on the mounting rack. An extraction hole position is formed in the brewing machine body. And the upper extraction mechanism is arranged on the mounting rack. The lower extraction mechanism is arranged at the bottom of the extraction hole site and can be driven by the lower extraction driving assembly to move in the axial direction of the extraction hole site. And the cleaning mechanism is arranged on the top surface of the brewing machine body. According to the utility model, the transmission frame capable of swinging and lifting is arranged, so that the upper extraction pressing seat can be switched between a position far away from the extraction hole position and a position for sealing the top of the extraction hole position under the driving of the upper extraction driving assembly. And during cleaning, the upper extraction mechanism can give way to the top of the extraction hole site, so that a user can conveniently clean the extraction hole site.

Description

Technical Field

[0001] The utility model belongs to the technical field of coffee brewing equipment, and particularly relates to a brewing device of a coffee machine. Background Art

[0002] A coffee brewer grinds, presses, loads, brews coffee manually and removes residues manually. Its main features are: simple machine structure, reliable operation, easy maintenance, and high-quality coffee can be made according to the correct usage method.

[0003] Chinese Patent with the publication number of "CN209984021U" discloses a semi-automatic coffee brewer, which includes a brewer body. Two first fixing blocks are symmetrically arranged on one side surface of the brewer body. A slag pushing arm is rotatably connected to the first fixing block through a slag pushing arm fixing shaft. The other end of the slag pushing arm away from the first fixing block is rotatably connected to a slag pushing rod. A slag outlet is opened on the surface of the brewer body at the lower end position of the first fixing block. A support plate is arranged on the surface of the brewer body near the slag pushing arm. The support plate is vertical and perpendicular to the plane where the slag outlet is located. A slag pushing arm micro switch is installed on one side surface of the support plate near the slag pushing arm, and a slag pushing motor is installed on the other side surface of the support plate away from the slag pushing arm.

[0004] The above patent extrudes the added coffee powder through a moving piston and a fixed piston to form a powder cake. After the extraction and brewing of the powder cake are completed, the slag pushing rod is used to push out the crushed slag of the powder cake. However, since both the moving piston and the fixed piston are arranged in the cavity of the brewer body, it is difficult for the user to observe whether there is residual crushed slag on the surface of the moving piston after cleaning. At the same time, the nearly sealed cavity further increases the difficulty for the user to clean the moving piston. Content of the Utility Model

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a brewing device of a coffee machine to solve the technical problem of difficult cleaning in the coffee brewing and extraction cavity and at the bottom.

[0006] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0007] A brewing device of a coffee machine includes a coffee machine main body, and the coffee machine main body includes an installation rack and a brewing body arranged on the installation rack. An extraction hole is opened on the brewing body;

[0008] An upper extraction device, which includes an upper extraction mechanism and an upper extraction driving component. The upper extraction mechanism is driven by the upper extraction driving component to switch between a state of leaving the extraction hole and a state of sealing the extraction hole;

[0009] A lower extraction device, the lower extraction device comprising a lower extraction mechanism and a lower extraction drive assembly, the lower extraction mechanism being arranged at the lower part of the extraction hole, and the lower extraction mechanism being driven by the lower extraction drive assembly to move along the axial direction of the extraction hole;

[0010] The cleaning mechanism is located at the upper end of the extraction hole. When the upper extraction mechanism is away from the extraction hole, the cleaning mechanism cleans the residue lifted up by the lower extraction mechanism.

[0011] Furthermore, the upper extraction mechanism includes a transmission frame, and a mounting base and an upper extraction pressure seat installed on the top of the transmission frame; the transmission frame is arranged on the mounting frame, and a limiting protrusion is provided on the transmission frame; a track groove matching the limiting protrusion is opened on the mounting frame; the transmission frame can complete the swinging and lifting movements under the drive of the upper extraction drive assembly and the guidance of the track groove.

[0012] Furthermore, the track groove is divided into arc segments and vertical segments which are connected in sequence.

[0013] Furthermore, the upper extraction drive assembly includes an upper driving power source, a turntable and an auxiliary connecting rod; the turntable is rotatably connected to the mounting frame and rotates under the drive of the upper driving power source; a clearance groove matching the rotating shaft on the turntable is provided at the bottom of the transmission frame; the clearance groove is a vertical groove perpendicular to the axis of the rotating shaft; one end of the auxiliary connecting rod is hinged to the outer end of the transmission half gear, and the other end is hinged to the transmission frame.

[0014] Furthermore, the cleaning mechanism includes a powder pushing member; the powder pushing member is slidably arranged on the top surface of the brewing machine body.

[0015] Furthermore, it also includes a transmission limit assembly, which includes a powder pushing connecting rod and a limit frame; one end of the powder pushing connecting rod is rotatably connected to the powder pushing member, and the other end is rotatably connected to the upper extraction mechanism, and the powder pushing member and the limit frame are slidably matched.

[0016] Furthermore, the lower extraction mechanism includes an extraction liquid inlet barrel and a lower extraction pressure seat installed on the top of the extraction liquid inlet barrel; the lower extraction pressure seat is slidably connected in the extraction hole, and can move and switch between the extraction hole extrusion extraction state and the cleaning state under the drive of the lower extraction drive assembly.

[0017] Furthermore, when the upper extraction mechanism is in a state of sealing the extraction hole, the lower extraction mechanism is lifted upward under the drive of the lower extraction drive assembly and switches to the extrusion extraction state; when the upper extraction mechanism is in a state of leaving the extraction hole, the lower extraction mechanism is lifted upward and continues to be lifted upward under the drive of the lower extraction drive assembly and switches to the cleaning state; the top surface of the lower extraction mechanism and the top surface of the brewing machine body form a cleaning plane.

[0018] Further, the lower extraction driving assembly includes a lower driving power source and a lower driving gear; the lower driving gear is rotatably connected to the installation frame and can rotate under the drive of the lower driving power source; the inner ring of the lower driving gear is sleeved on the extraction liquid inlet barrel; an internal thread is provided on the inner ring of the lower driving gear; an external thread matching the internal thread is provided on the outer wall of the extraction liquid inlet barrel.

[0019] Further, the extraction liquid inlet barrel has a hollow cylindrical structure, and vertical limiting through grooves are provided on the inner wall; a limiting shaft penetrates through the limiting through grooves; both ends of the limiting shaft are fixed to the installation frame.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] 1. By setting a transmission frame that can swing and lift, the upper extraction pressing seat can be switched between a position far from the extraction hole position and a position sealing the top of the extraction hole position under the drive of the upper extraction driving assembly. When cleaning, the upper extraction mechanism gives way to the top of the extraction hole position, facilitating the user to clean the extraction hole position.

[0022] 2. The utility model sets a lower extraction driving assembly to drive the lower extraction mechanism to move vertically within the extraction hole position. The lower extraction mechanism can move to be flush with the top surface of the brewing machine body under the drive of the lower extraction driving assembly, forming a cleaning plane, facilitating the user to clean the extraction chamber, that is, the top surface of the lower extraction mechanism. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 is a schematic diagram of the structure of the upper extraction mechanism of the utility model;

[0025] Figure 3 is a schematic diagram of the relative position between the upper extraction mechanism and the lower extraction mechanism of the utility model;

[0026] Figure 4 is of the utility model Figure 3 partial enlarged view of part A;

[0027] Figure 5 is the structure of the lower extraction drive of the utility model;

[0028] Figure 6 is a schematic diagram of the relative movement process of the upper extraction mechanism and the upper extraction driving assembly of the utility model;

[0029] Figure 7 is a schematic diagram of the movement process of the upper extraction mechanism of the utility model.

[0030] Reference numerals: 1, coffee machine main body; 1-1, mounting frame; 1-2, brewing body; 1-3, track groove; 1-3-1, arc section; 1-3-2, vertical section; 1-4, extraction hole position; 2, upper extraction mechanism; 2-1, upper extraction pressing seat; 2-2, mounting base; 2-3, transmission frame; 2-3-1, relief through groove; 2-4, auxiliary connecting rod; 2-4-1, connecting section; 2-4-2, supporting section; 3, lower extraction mechanism; 3-1, extraction liquid inlet barrel; 3-2, lower extraction pressing seat; 3-3, limiting through groove; 4, upper extraction driving assembly; 4-1, upper extraction driving motor; 4-2, idler gear; 4-3, transmission half gear; 5, lower extraction driving assembly; 5-1, lower extraction driving motor; 5-2, limiting shaft; 5-3, lower driving gear; 6, cleaning mechanism; 6-1, powder pushing member; 7, powder pushing connecting rod; 8, limiting frame. Detailed implementation manners

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end portion", "length", "outer end", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] The present utility model will be further described below with reference to the drawings.

[0033] As Figure 1 and 2 shown, a brewing device of a coffee machine includes a coffee machine main body 1, an upper extraction device, a lower extraction device, and a cleaning mechanism 6. The coffee machine main body 1 includes a mounting frame 1-1 and a brewing body 1-2 provided on the mounting frame 1-1. An extraction hole position 1-4 penetrating through the brewing body 1-2 is provided on the brewing body 1-2.

[0034] As Figure 2 and 3 shown, the upper extraction device includes an upper extraction mechanism 2 and an upper extraction driving assembly 4. The upper extraction mechanism 2 is provided on the mounting frame 1-1 and can be switched between a position far from the extraction hole position 1-4, a position directly above the extraction hole position 1-4, and a position sealing the top of the extraction hole position 1-4 under the drive of the upper extraction driving assembly 4.

[0035] The lower extraction device includes a lower extraction mechanism 3 and a lower extraction drive assembly 5. The lower extraction mechanism 3 is arranged at the bottom of the extraction holes 1-4. The lower extraction mechanism 3 can move along the axial direction of the extraction holes 1-4 under the drive of the lower extraction drive assembly 5, and complete the compaction of the coffee powder in the extraction holes 1-4 under the cooperation of the upper extraction mechanism 2.

[0036] The cleaning mechanism 6 is arranged on the top surface of the brewing body 1-2, and a transmission limit assembly is arranged between the upper extraction drive assembly 4. Through the linkage of the transmission limit assembly, the upper extraction drive assembly 4 can drive the cleaning assembly to complete the cleaning of the coffee powder and dregs at the bottom of the lower extraction mechanism 3.

[0037] Specifically, the upper extraction mechanism 2 includes an upper extraction press seat 2-1, a mounting base 2-2, and a transmission frame 2-3 mounted on both sides of the mounting base 2-2. The upper extraction press seat 2-1 is fixed on the mounting base 2-2. A limiting protrusion is arranged on the transmission frame 2-3. A track groove 1-3 matching with the limiting protrusion is provided on the mounting frame 1-1. The inner end of the limiting protrusion is inserted into the track groove 1-3. The track groove 1-3 is divided into an arc segment 1-3-1 and a vertical segment 1-3-2 connected in sequence. Under the drive of the upper extraction drive assembly 4, when the limiting protrusion moves in the arc segment of the track groove 1-3, the top of the transmission frame 2-3 is limited to swing; when the limiting protrusion moves in the vertical segment of the track groove 1-3, the transmission frame 2-3 is limited to move in the vertical direction.

[0038] In this embodiment, the upper extraction drive assembly 4 includes an upper driving power source, a rotating disk and an auxiliary connecting rod 2-4. The rotating disk is rotatably connected to the mounting frame 1-1 and rotates under the drive of the upper driving power source; a clearance slot 2-3-1 is provided at the bottom of the transmission frame 2-3 to match the rotating shaft on the rotating disk; the clearance slot 2-3-1 is a vertical slot perpendicular to the axis of the rotating shaft; one end of the auxiliary connecting rod 2-4 is hinged to the outer end of the transmission half gear 4-3, and the other end is hinged to the transmission frame 2-3.

[0039] Specifically, the upper driving power source adopts the upper extraction driving motor 4-1; the turntable adopts the transmission half gear 4-3. The upper extraction driving motor 4-1 is fixed on the mounting frame 1-1, and a driving gear is fixed on the output shaft. The transmission half gear 4-3 is rotatably connected to a side wall of the mounting frame 1-1, and is connected to the driving gear through the idler gear 4-2.

[0040] A relief through groove 2-3-1 that matches the rotating shaft of the transmission semi-gear 4-3 is provided at the bottom of the transmission frame 2-3. The relief through groove 2-3-1 is a vertical through groove perpendicular to the axis of the rotating shaft. The inner end of the rotating shaft on the transmission semi-gear 4-3 passes through the relief through groove 2-3-1 and is rotatably connected to the mounting frame 1-1. The setting of the relief through groove 2-3-1 provides a moving space for the rotating shaft of the transmission semi-gear 4-3 when the transmission frame 2-3 moves. An auxiliary connecting rod 2-4 for assisting the swinging and lifting of the transmission frame 2-3 is hinged on the side wall of the transmission frame 2-3. The outer end of the auxiliary connecting rod 2-4 is hinged to the outer end of the transmission semi-gear 4-3.

[0041] As Figure 6 and 7 shown, during the working process, under the drive of the upper extraction drive assembly 4, the upper extraction mechanism 2 has two working states, namely the state of leaving the extraction hole position 1-4 and the state of sealing the extraction hole position 1-4. When the upper extraction mechanism 2 is in the state of leaving the extraction hole position 1-4, the transmission frame 2-3 in the upper extraction mechanism 2 is in an inclined state, and the limit bump mounted on it is located at the initial end of the arc section of the track groove 1-3, providing a defined support for the top of the transmission frame 2-3. The rotating shaft of the transmission semi-gear 4-3 at the bottom of the transmission frame 2-3 is located at the bottom end of the relief through groove 2-3-1. The rotating shaft of the transmission semi-gear 4-3 is used to provide a limit support for the bottom end of the transmission frame 2-3. The upper extraction pressing seat 2-1 fixed to the transmission frame 2-3 is located on the side away from the extraction hole position 1-4, so that the upper extraction pressing seat 2-1 provides a clearance for the area above the extraction hole position 1-4, facilitating the user to clean the residual coffee powder and dregs at the extraction hole position 1-4.

[0042] When the upper extraction mechanism 2 is in the state of sealing the extraction hole position 1-4, the transmission frame 2-3 in the upper extraction mechanism 2 descends to the bottom limit position of the track groove 1-3. The limit bump mounted on the transmission frame 2-3 is located at the bottom of the vertical section of the track groove 1-3, providing a support for the top of the transmission frame 2-3. The bottom of the transmission frame 2-3 is supported by the rotating shaft of the transmission semi-gear 4-3. At the same time, the upper extraction pressing seat 2-1 fixed to the transmission frame 2-3 is inserted into the extraction hole position 1-4 to seal the top of the extraction hole position 1-4.

[0043] In use, by the forward and reverse rotation of the upper extraction drive motor 4-1, the upper extraction mechanism 2 is sequentially switched between the state of leaving the extraction hole position 1-4 and the state of sealing the extraction hole position 1-4. When the upper extraction mechanism 2 moves from the state of sealing the extraction hole position 1-4 to the state of leaving the extraction hole position 1-4, the drive transmission half gear 4-3 rotates counterclockwise and gradually rises under the push of the auxiliary connecting rod 2-4 until it rises to the transition position. The transmission half gear 4-3 continues to flip and pushes the upper extraction mechanism 2 to move along the arc section of the track groove 1-3 until it returns to the state of leaving the extraction hole position 1-4. Conversely, by driving the transmission half gear 4-3 to rotate clockwise, the state is switched.

[0044] In this embodiment, the auxiliary connecting rod 2-4 is bent and is divided into a connecting section 2-4-1 and a supporting section 2-4-2 that are sequentially connected. When the upper extraction mechanism 2 is in the sealed position, the projections of the top and bottom ends of the auxiliary connecting rod 2-4 coincide. At the same time, the bottom end of the supporting section 2-4-2 of the auxiliary connecting rod 2-4 is misaligned with the bending point of the connecting section 2-4-1 and the supporting section 2-4-2 (i.e., the projection is misaligned on the horizontal plane).

[0045] When both the auxiliary connecting rod 2-4 and the transmission frame 2-3 are vertical, by driving the transmission half gear 4-3 to rotate counterclockwise, the bottom end of the auxiliary connecting rod 2-4 is driven to move outward. Since the connecting section 2-4-1 in the auxiliary connecting rod 2-4 is in an inclined and inward state relative to the auxiliary connecting rod 2-4, driven by the transmission half gear 4-3, an inclined and inward thrust will be exerted on the transmission frame 2-3. This thrust has an upward component and an inward component. When the transmission frame 2-3 is limited by the vertical section of the track groove 1-3, it will move vertically upward. When the transmission frame 2-3 is limited by the arc section of the track groove 1-3, the top of the transmission frame 2-3 will move in an arc.

[0046] As Figure 3 、 4 As shown in FIGS. 5, the lower extraction mechanism 3 includes an extraction liquid inlet barrel 3-1 and a lower extraction pressure seat 3-2 installed on the top of the extraction liquid inlet barrel 3-1. The lower extraction pressure seat 3-2 is slidably connected in the extraction hole position 1-4. During the working process, the lower extraction mechanism 3 can be driven by the lower extraction drive assembly 5 to move and switch between the extraction extrusion state and the cleaning state in the extraction hole position 1-4.

[0047] When the upper extraction mechanism 2 is in the state of sealing the extraction hole position 1-4, the lower extraction mechanism 3 is lifted upward under the drive of the lower extraction drive assembly 5 and switches to the extrusion extraction state; when the upper extraction mechanism 2 is in the state of leaving the extraction hole position 1-4, the lower extraction mechanism 3 continues to be lifted upward under the drive of the lower extraction drive assembly 5 and switches to the cleaning state; the top surface of the lower extraction mechanism 3 and the top surface of the brewing body 1-2 form a cleaning plane.

[0048] In the initial state, the lower extraction pressure seat 3-2 is located at the bottom of the extraction chamber, and its top surface and the inner wall of the extraction hole 1-4 form an extraction chamber for coffee powder extraction. The user adds coffee powder into the extraction chamber. During use, the lower extraction pressure seat 3-2 moves upward under the drive of the lower extraction drive assembly 5 to switch to the extrusion extraction state, and cooperates with the upper extraction mechanism 2 to extrude the coffee powder in the extraction chamber into a powder cake. After the extrusion is completed, the lower extraction pressure seat 3-2 moves a certain distance to prepare for brewing.

[0049] The lower extraction drive assembly 5 includes a lower drive power source and a lower drive gear 5-3. The lower drive gear 5-3 is rotatably connected to the mounting frame 1-1 and can rotate under the drive of the lower drive power source; the inner ring of the lower drive gear 5-3 is sleeved on the extraction liquid inlet barrel 3-1; an internal thread is provided on the inner ring of the lower drive gear 5-3; an external thread matching the internal thread is provided on the outer wall of the extraction liquid inlet barrel 3-1.

[0050] In this embodiment, the lower drive power source includes a lower extraction drive motor 5-1 and a gear transmission group. The lower extraction drive motor 5-1 is fixed on the mounting frame 1-1, and its output shaft is connected to the gear transmission group. The output gear in the gear transmission group meshes with the lower drive gear 5-3.

[0051] Furthermore, the extraction liquid inlet barrel 3-1 has a hollow cylindrical structure, and a vertical limiting through groove 3-3 is provided on the inner wall. A limiting shaft 5-2 passes through the limiting through groove 3-3. Both ends of the limiting shaft 5-2 are fixed to the mounting frame 1-1. The arrangement of the limiting shaft 5-2 is used to prevent the extraction liquid inlet barrel 3-1 from rotating, so that it can move along the vertical direction under the drive of the lower extraction drive motor 5-1.

[0052] In this embodiment, a plurality of water inlet holes are provided on the lower extraction pressure seat 3-2. An inlet pipeline communicating with each water outlet hole is provided on the extraction liquid inlet barrel 3-1. High-temperature water enters from the inlet pipeline and flows into the extraction chamber through each water inlet hole to extract the powder cake in the extraction chamber. A plurality of water outlet holes are provided on the upper extraction pressure seat 2-1, and an outlet pipeline communicating with each water outlet hole is provided on the mounting base 2-2. The extraction liquid obtained in the extraction chamber will flow through the water outlet holes and flow out from the outlet of the outlet pipeline under the continuous introduction of high-temperature water.

[0053] In addition, in this embodiment, filter meshes are provided on the bottom surface of the upper extraction pressure seat 2-1 and the top surface of the lower extraction pressure seat 3-2 to prevent impurities and powder cake residues from entering the output extraction liquid. Annular grooves are provided on the outer rings of the upper extraction pressure seat 2-1 and the lower extraction pressure seat 3-2. Sealing rings are provided in both annular grooves to prevent leakage of the extraction liquid during extraction.

[0054] After the extraction of the powder cake is completed, the remaining powder residue stays on the top surface of the lower extraction pressing seat 3-2. The upper extraction mechanism 2 is reset under the drive of the upper extraction drive assembly 4. It returns to the state of leaving the extraction hole position 1-4, making way for the top of the extraction hole position. The lower extraction pressing seat 3-2 continues to rise under the drive of the lower extraction drive assembly 5 until the top surface of the lower extraction pressing seat 3-2 is flush with the top surface of the brewing body 1-2. The top surface of the lower extraction pressing seat 3-2 and the top surface of the brewing body 1-2 form a cleaning plane.

[0055] The cleaning mechanism 6 is driven and limited by the transmission limiting assembly. Under the drive of the upper extraction drive assembly 4, the cleaning mechanism 6 can move along the surface of the brewing body to initially scrape and clean the slag lifted by the lower extraction mechanism 3. The cleaning mechanism 6 includes a powder pushing member 6-1. The powder pushing member 6-1 is slidably arranged on the top surface of the brewing body 1-2.

[0056] The transmission limiting assembly includes two powder pushing connecting rods 7 and limiting frames 8 arranged on both sides of the powder pushing member 6-1. Both ends of the powder pushing connecting rod 7 are hinged to the powder pushing member 6-1 and the top of the transmission frame 2-3 respectively, for converting the force that the upper extraction drive assembly 4 drives the transmission frame 2-3 to swing into the force for pushing the powder pushing member 6-1 to move.

[0057] The bottoms of the two limiting frames 8 are both fixed to the installation frame 1-1. The limiting frames 8 are provided with limiting grooves parallel to the cleaning plane. Two spaced limiting convex rods are fixed on both side surfaces of the powder pushing member 6-1. The outer ends of the limiting convex rods are inserted into the limiting grooves and are limited by the limiting grooves, so that when the powder pushing member 6-1 is subjected to the thrust of the powder pushing connecting rod 7, it can only move along the cleaning plane, thus pushing the powder cake residue on the cleaning plane to the trash can.

[0058] The working principle of the present utility model is as follows:

[0059] The clockwise rotation of the upper extraction drive motor 4-1 drives the upper extraction mechanism 2 to switch from the state of leaving the extraction hole position 1-4 and the state of sealing the extraction hole position 1-4, and seals the top of the extraction hole position.

[0060] The lower extraction pressing seat 3-2 moves upward under the drive of the lower extraction drive assembly 5, and cooperates with the upper extraction mechanism 2 to squeeze the coffee powder in the extraction chamber into a powder cake. After the extrusion is completed, the lower extraction pressing seat 3-2 moves a certain distance to prepare for brewing.

[0061] High-temperature water enters from the water inlet pipe and flows into the extraction chamber from each water outlet to extract the powder cake in the extraction chamber. A plurality of water outlet holes are provided on the upper extraction pressing seat 2-1, and a liquid outlet pipe communicating with each water outlet hole is provided on the installation base 2-2. The extraction liquid obtained in the extraction chamber will flow through the water outlet holes and flow out from the liquid outlet of the liquid outlet pipe under the continuous introduction of high-temperature water.

[0062] After the extraction of the powder cake is completed, the remaining powder residue stays on the top surface of the lower extraction pressing seat 3-2. The upper extraction mechanism 2 is reset under the drive of the upper extraction drive assembly 4 and returns to the initial position, so as to make way for the top of the extraction hole position. The lower extraction pressing seat 3-2 continues to rise under the drive of the lower extraction drive assembly 5 until the top surface of the lower extraction pressing seat 3-2 is flush with the top surface of the brewing machine body 1-2. The top surface of the lower extraction pressing seat 3-2 and the top surface of the brewing machine body 1-2 form a cleaning plane.

[0063] Under the drive of the upper extraction drive assembly 4, through the transmission of two powder pushing connecting rods 7, the powder pushing member 6-1 moves along the cleaning plane, so as to push the powder cake residue on the cleaning plane to the trash can. After the scraping of the powder cake residue is completed, the upper extraction drive assembly 4 drives the powder pushing member 6-1 to reset, and the user can perform secondary cleaning on the lower extraction pressing seat 3-2 manually.

[0064] After the cleaning is completed, the lower extraction pressing seat 3-2 is reset to the bottom of the extraction hole position under the drive of the lower extraction drive assembly 5, waiting for the next extraction and brewing of coffee powder.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A brewing device for a coffee machine, characterized in that: include: A coffee machine body (1), the coffee machine body (1) comprising a mounting frame (1-1), and a brewing body (1-2) arranged on the mounting frame (1-1), wherein the brewing body (1-2) is provided with an extraction hole (1-4); An upper extraction device, the upper extraction device comprising an upper extraction mechanism (2) and an upper extraction drive assembly (4), wherein the upper extraction mechanism (2) is driven by the upper extraction drive assembly (4) to switch between a state of leaving the extraction holes (1-4) and a state of sealing the extraction holes (1-4); A lower extraction device, the lower extraction device comprising a lower extraction mechanism (3) and a lower extraction drive assembly (5), the lower extraction mechanism (3) being arranged at the lower part of the extraction hole position (1-4), and the lower extraction mechanism (3) being driven by the lower extraction drive assembly (5) to move along the axial direction of the extraction hole position (1-4); A cleaning mechanism (6), wherein the cleaning mechanism (6) is located at the upper end of the extraction hole position (1-4), and when the upper extraction mechanism (2) is in a state of leaving the extraction hole position (1-4), the cleaning mechanism (6) cleans the material residue lifted up by the lower extraction mechanism (3).

2. The brewing device of a coffee machine according to claim 1, characterized in that: The upper extraction mechanism (2) comprises a transmission frame (2-3), and a mounting base (2-2) and an upper extraction pressing seat (2-1) mounted on the top of the transmission frame (2-3); the transmission frame (2-3) is arranged on the mounting frame (1-1), and a limiting protrusion is arranged on the transmission frame (2-3); a track groove (1-3) matched with the limiting protrusion is opened on the mounting frame (1-1); the transmission frame (2-3) can complete the swinging and lifting actions under the drive of the upper extraction driving component (4) and the guidance of the track groove (1-3).

3. The brewing device of a coffee machine according to claim 2, characterized in that: The track groove (1-3) is divided into an arc segment (1-3-1) and a vertical segment (1-3-2) which are connected in sequence.

4. The brewing device of a coffee machine according to claim 2, characterized in that: The upper extraction drive assembly (4) comprises an upper driving power source, a rotating disk and an auxiliary connecting rod (2-4); the rotating disk is rotatably connected to the mounting frame (1-1) and rotates under the drive of the upper driving power source; a clearance groove (2-3-1) matching with the rotating shaft on the rotating disk is provided at the bottom of the transmission frame (2-3); the clearance groove (2-3-1) is a vertical groove perpendicular to the axis of the rotating shaft; one end of the auxiliary connecting rod (2-4) is hinged to the outer end of the transmission half gear (4-3), and the other end is hinged to the transmission frame (2-3).

5. The brewing device of a coffee machine according to claim 1, characterized in that: The cleaning mechanism (6) comprises a powder pushing member (6-1); the powder pushing member (6-1) is slidably arranged on the top surface of the brewing machine body (1-2).

6. The brewing device of a coffee machine according to claim 5, characterized in that: It also includes a transmission limit assembly, which includes a powder pushing connecting rod (7) and a limit frame (8); one end of the powder pushing connecting rod is rotatably connected to the powder pushing member (6-1), and the other end is rotatably connected to the upper extraction mechanism (2); the powder pushing member and the limit frame are slidably matched.

7. The brewing device of a coffee machine according to claim 1, characterized in that: The lower extraction mechanism (3) comprises an extraction liquid inlet barrel (3-1) and a lower extraction press seat (3-2) mounted on the top of the extraction liquid inlet barrel (3-1); the lower extraction press seat (3-2) is slidably connected in the extraction hole position (1-4) and can be driven by the lower extraction drive component (5) to move and switch between a squeeze extraction state and a cleaning state of the extraction hole position (1-4).

8. The brewing device of a coffee machine according to claim 1, characterized in that: When the upper extraction mechanism (2) is in a state of sealing the extraction hole position (1-4), the lower extraction mechanism (3) is lifted upwards under the drive of the lower extraction drive component (5) and switches to a squeeze extraction state; when the upper extraction mechanism (2) is in a state of leaving the extraction hole position (1-4), the lower extraction mechanism (3) is lifted upwards and continues to be lifted upwards under the drive of the lower extraction drive component (5) and switches to a cleaning state; the top surface of the lower extraction mechanism (3) and the top surface of the brewing machine body (1-2) form a cleaning plane.

9. The brewing device of a coffee machine according to claim 7, characterized in that: The lower extraction drive assembly (5) comprises a lower drive power source and a lower drive gear (5-3); the lower drive gear (5-3) is rotatably connected to the mounting frame (1-1) and can be rotated under the drive of the lower drive power source; the lower drive gear (5-3) is sleeved on the extraction liquid inlet barrel (3-1), and the inner ring is provided with an internal thread; the outer wall of the extraction liquid inlet barrel (3-1) is provided with an external thread matching the internal thread.

10. The brewing device of a coffee machine according to claim 9, characterized in that: The extraction liquid inlet barrel (3-1) is in a hollow cylindrical structure, and a vertical limiting groove (3-3) is provided on the inner wall; a limiting shaft (5-2) passes through the limiting groove (3-3); both ends of the limiting shaft (5-2) are fixed to the mounting frame (1-1).

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