Coffee machine

Abstract

The invention relates to the technical field of coffee machines, in particular to a coffee machine which comprises a machine frame, a barrel portion located on the machine frame, a first brewing head located on the machine frame and a linkage mechanism, the barrel portion is provided with a brewing groove with an opening in the upper end, the linkage mechanism is at least provided with a first station and a second station, and when the linkage mechanism is located at the first station, the second station is located at the second station. When the linkage mechanism is located at the first station, the first brewing head opens the brewing groove, and when the linkage mechanism is located at the second station, the first brewing head closes the brewing groove. When the device works and the linkage mechanism moves to the first station, a worker puts raw materials for brewing coffee into the brewing groove manually or through a machine, then the linkage mechanism moves to the second station to drive the first brewing head to close the brewing groove to brew coffee, and after brewing is completed, the linkage mechanism moves to the first station again, so that the coffee is brewed. According to the device, various actions are completed through the linkage mechanism, so that the use of parts is reduced, and the structural complexity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee machines, and in particular to a coffee machine. Background Art

[0002] As people's quality of life improves, their love for coffee drinks grows day by day, and coffee brewing machines are gradually becoming popular. The higher the automation of the coffee brewing machine, the more parts it requires, and the more parts there are, the higher the damage rate will be. Summary of the invention

[0003] The purpose of the present invention is to solve the problem of many parts of the coffee brewing machine in the prior art, and to propose a coffee machine.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A coffee machine comprises a frame, a cylinder portion located on the frame, a first brewing head located on the frame, and a linkage mechanism, wherein the cylinder portion has a brewing tank with an open upper end, and the linkage mechanism has at least a first station and a second station, when the linkage mechanism is in the first station, the first brewing head opens the brewing tank, and when the linkage mechanism is in the second station, the first brewing head closes the brewing tank, and the linkage mechanism comprises a transmission frame, and when the transmission frame moves along a rotation direction, the linkage mechanism can move from the first station to the second station.

[0006] The linkage mechanism includes a support shaft installed with the frame, a transmission frame installed with the support shaft, and a support frame movably connected with the support shaft. The first brewing head is installed at one end of the support frame away from the support shaft. The support frame is located between the first brewing head and the support shaft and is provided with a second guide member. The second guide member includes a first portion and a second portion. The transmission frame is provided with a first limiting groove, and the frame is provided with a third guide hole. The first portion is limitedly installed in the third guide hole, and the second portion is limitedly installed in the first limiting groove. Rotating the transmission frame can make the second guide member linked in the first limiting groove and the third guide hole, so that the linkage mechanism moves to the first station and the second station.

[0007] The third guide hole comprises a first hole portion and a second hole portion which are connected to each other, the first hole portion is an arc-shaped structure with the axis of the support shaft as the center, the second hole portion is located at one end of the first hole portion and extends radially toward the support shaft along the support shaft, the first limiting groove is arranged non-radially along the support shaft, and one end of the first limiting groove is close to the support shaft and the other end is far away from the support shaft;

[0008] And / or, the support frame has a second guide hole at one end away from the first brewing head, the second guide hole is arranged along the line between the second guide member and the support shaft, and the support shaft is movably limited in the second guide hole.

[0009] A brewing mechanism is provided in the frame, and the brewing mechanism includes a screw arranged axially along the barrel portion, a second brewing head is installed on the top of the screw, and the second brewing head is slidingly sealed and installed in the brewing tank. A power guide mechanism is provided between the screw and the frame, and the power guide mechanism can drive the screw to move upward or downward.

[0010] The power guide mechanism includes a second motor fixed to the frame, a third gear is threadedly connected to the outer circumference of the screw, the third gear is rotatably connected to the frame, the second motor power output shaft is equipped with a second gear transmission-connected to the third gear, the screw is provided with a first guide hole along its length direction, the support shaft passes through the first guide hole and the two are limitedly matched.

[0011] The second brewing head comprises a first housing and a second filter, a second mixing chamber is provided between the second filter and the first housing, a liquid inlet channel is provided in the screw, the liquid inlet channel has a second end and a first end, the second end is connected to the brewing tank through the second mixing chamber, and the first end is connected to a water source;

[0012] And / or, the first brewing head includes a second shell and a first filter element, a first mixing chamber is provided between the second shell and the first filter element, the second shell is provided with a drainage channel, the drainage channel has a third end and a fourth end, and the fourth end can be connected to the brewing tank through the first mixing chamber.

[0013] The frame is fixedly mounted with a liquid outlet, and the liquid outlet is connected to the third end via a quick-connect connector and a hose;

[0014] And / or, a liquid inlet is fixedly mounted on the frame, and the liquid inlet is connected to the first end via a quick-connect connector and a hose.

[0015] The coffee machine includes a slag pusher, and the linkage mechanism also has a third station. According to the operating time, the third station is located between the first station and the second station. When the linkage mechanism is in the first station, the slag pusher opens the brewing tank. When the linkage mechanism moves from the first station to the third station, the slag pusher passes through the top of the brewing tank.

[0016] The frame is provided with a third slide rail above, the slag pusher has a second slide rail slidably matched with the third slide rail, the slag pusher has a vertically arranged first slide rail, the first slide rail is movable and limitedly installed with a first guide member, and the first guide member is assembled with the support frame;

[0017] and / or the side of the frame away from the first brewing head has a landslide, and the slag pushing member can push the waste to the landslide;

[0018] And / or the slag pushing member has a concave wall portion adapted to the brewing trough, and a retaining ring extends from the end of the concave wall portion.

[0019] The linkage mechanism comprises a first motor fixed to the frame, a first gear is installed on the power output shaft of the first motor, and the transmission frame has a gear portion coaxially arranged with the support shaft, and the gear portion meshes with the transmission frame for transmission.

[0020] A coffee machine proposed in the present invention has the beneficial effect that: when the device is working, when the linkage mechanism moves to the first station, the worker puts the raw materials for brewing coffee into the brewing tank manually or through a machine, and then the linkage mechanism moves to the second station, driving the first brewing head to close the brewing tank to brew coffee, and after brewing is completed, the linkage mechanism moves to the first station again, opens the brewing tank to discharge slag, and the device completes multiple actions through the linkage mechanism, which is beneficial to reduce the use of components and reduce structural complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of the present invention Figure 1 ;

[0022] Figure 2 A schematic diagram of a local three-dimensional structure of an embodiment of the present invention Figure 1 ;

[0023] Figure 3 A schematic diagram of a local three-dimensional structure of an embodiment of the present invention Figure 2 ;

[0024] Figure 4 The internal structure of an embodiment of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 5 The internal structure of an embodiment of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 6 A schematic diagram of a partially cutaway three-dimensional structure of an embodiment of the present invention;

[0027] Figure 7 This is a schematic structural diagram of a first brewing head according to an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the transmission frame structure of an embodiment of the present invention;

[0029] Fig. 9 This is a schematic diagram of the structure of a slag pusher according to an embodiment of the present invention;

[0030] Fig.10 A schematic diagram of a screw structure according to an embodiment of the present invention;

[0031] Fig.11 This is a schematic diagram of the structure of a cylinder body according to an embodiment of the present invention;

[0032] Fig.12 This is a schematic diagram of the structure of the third guide hole, the first limiting groove, and the second guide member in the first working position according to an embodiment of the present invention;

[0033] Fig.13 This is a schematic diagram of the structure of the third guide hole, the first limiting groove, and the second guide member in the second working position according to an embodiment of the present invention;

[0034] Fig.14 This is a schematic diagram of the structure of the third guide hole, the first limiting groove, and the second guide member in the third working position according to an embodiment of the present invention;

[0035] Fig.15 This is a schematic structural diagram of a material receiving state at the first station in an embodiment of the present invention;

[0036] Fig.16 This is a schematic diagram of the sealing state structure of the second working position of an embodiment of the present invention;

[0037] Fig.17 This is a schematic diagram of the brewing state structure at the second working position of an embodiment of the present invention;

[0038] Fig.18 This is a schematic diagram of the structure before the waste is pushed out at the first station in one embodiment of the present invention;

[0039] Fig.19 This is a schematic diagram of the structure after the waste is pushed out at the first station in one embodiment of the present invention;

[0040] Fig. 20 This is a schematic diagram of the structure after slag pushing at the third workstation in one embodiment of the present invention.

[0041] In the figure: frame 1, transmission frame 2, gear part 3, first gear 4, support frame 5, first guide member 6, first slide rail 7, second slide rail 8, slag pusher 9, retaining ring 10, brewing tank 11, third slide rail 12, slide 13, first brewing head 14, first filter 15, first mixing chamber 16, first motor 17, second gear 18, second motor 19, liquid inlet channel 20, first end 21, screw 22, third gear 23, first guide hole 24, second mixing chamber 25, second filter element 26, first limiting groove 27, second guide element 28, second guide hole 29, support shaft 30, third guide hole 31, first hole portion 32, second hole portion 33, first part 34, second part 35, cylinder portion 36, liquid inlet member 37, liquid outlet member 38, liquid discharge channel 39, third end 40, fourth end 41, second end 42, second brewing head 43, first shell 44, second shell 45. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] Reference Figure 1-Figure 20 A coffee machine includes a frame 1, a barrel portion 36 located on the frame 1, a first brewing head 14 located on the frame 1, and a linkage mechanism, wherein the barrel portion 36 has a brewing tank 11 with an open upper end, the linkage mechanism has at least a first station and a second station, when the linkage mechanism is in the first station, the first brewing head 14 opens the brewing tank 11, when the linkage mechanism is in the second station, the first brewing head 14 closes the brewing tank 11, the linkage mechanism includes a transmission frame 2, when the transmission frame 2 moves along a rotation direction, the linkage mechanism can move from the first station to the second station, and the movement method is simple.

[0044] When this device is working, refer to Fig.12 , Fig.15 When the linkage mechanism moves to the first station, the worker manually or by machine puts the raw materials for brewing coffee into the brewing tank 11, referring to Fig.13 , Fig.17 Then the linkage mechanism moves to the second station, driving the first brewing head 14 to close the brewing tank 11 to brew coffee. After brewing is completed, the linkage mechanism moves to the first station again to open the brewing tank 11 to discharge slag. The device completes multiple actions through the linkage mechanism, which is beneficial to reduce the use of parts and components and reduce structural complexity.

[0045] As an implementation method of the linkage mechanism, refer to Figure 1-Figure 10The linkage mechanism includes a support shaft 30 installed with the frame 1, a transmission frame 2 installed with the support shaft 30, and a support frame 5 movably connected with the support shaft 30. The first brewing head 14 is installed at one end of the support frame 5 away from the support shaft 30. The support frame 5 is located between the first brewing head 14 and the support shaft 30 and is equipped with a second guide member 28. The second guide member 28 includes a first portion 34 and a second portion 35. The transmission frame 2 is provided with a first limiting groove 27. The frame 1 is provided with a third guide hole 31. The first portion 34 is limitedly installed in the third guide hole 31, and the second portion 35 is limitedly installed in the first limiting groove 2 7, the rotating transmission frame 2 can make the second guide member 28 link in the first limiting groove 27 and the third guide hole 31, so that the linkage mechanism moves to the first position and the second position; the third guide hole 31 includes a first hole portion 32 and a second hole portion 33 which are connected and arranged, the first hole portion 32 is an arc structure with the axis of the support shaft 30 as the center, the second hole portion 33 is located at one end of the first hole portion 32 and extends in the radial direction of the support shaft 30 toward the support shaft 30, the first limiting groove 27 is arranged non-radially along the support shaft 30, and one end of the first limiting groove 27 is close to the support shaft 30, and the other end is far away from the support shaft 30;

[0046] When working, the process of moving from the first station to the second station refers to Fig.12 , Fig.13 , the device only needs to rotate the transmission frame 2 clockwise. Since the second guide member 28 is fixed to the support frame 5, and the second portion 35 of the second guide member 28 is limited in the first limiting groove 27 of the transmission frame 2, and the first portion 34 of the second guide member 28 is limited in the third guide hole 31 of the frame 1, when the transmission frame 2 rotates clockwise, since the first hole portion 32 is an arc structure with the axis of the support shaft 30 as the center, the transmission frame 2 will drive the second guide member 28 to move in the first hole portion 32, so as to realize the rotation of the support frame 5 around the support shaft 30, so that the first brewing head 14 moves to the top of the brewing tank 11. When the first portion 34 moves from the first hole portion 32 to the second hole portion 33, the first portion 34 will be restricted by the second hole portion 33 and will not continue to rotate around the support shaft 30. As the transmission frame 2 continues to rotate, at this time, since the first limiting groove 27 is non-radially arranged along the support shaft 30, and one end of the first limiting groove 27 is close to the support shaft 30 and the other end is far away from the support shaft 30, refer to Fig.13Therefore, the second guide member 28 will make a composite movement in the second hole portion 33 and the first limiting groove 27, so that the second guide member 28 moves downward along the second hole portion 33, so that the support frame 5 can drive the first brewing head 14 to move downward into the brewing tank 11, and complete the sealing step of the first brewing head 14 and the brewing tank 11, and then the coffee brewing process can be carried out. After the brewing is completed, it is only necessary to rotate the transmission frame 2 counterclockwise to make the first brewing head 14 move upward and counterclockwise to the initial state again. When the device is working, it is only necessary to rotate the transmission frame 2 forward and reverse to complete the opening and closing steps of the first brewing head 14 to the brewing tank 11, and the number of parts used is effectively reduced. At the same time, since the second guide member 28 only needs to move in the first limiting groove 27 and the third guide hole 31, the probability of structural damage is greatly reduced, and the movement path is made more accurate and reliable.

[0047] Furthermore, the end of the support frame 5 away from the first brewing head 14 has a second guide hole 29, and the second guide hole 29 is arranged along the line between the second guide member 28 and the support shaft 30, and the support shaft 30 is movably limited in the second guide hole 29. The bottom end of the support frame 5 is limited by the support shaft 30, so that the support frame 5 can stably rotate around the support shaft 30 and move up and down.

[0048] refer to Figure 4 , Figure 5 , Figure 6 , Fig.15 A brewing mechanism is provided in the frame 1, and the brewing mechanism includes a screw 22 axially arranged along the barrel portion 36, a second brewing head 43 is installed on the top of the screw 22, and the second brewing head 43 is slidingly sealed and installed in the brewing tank 11. A power guide mechanism is provided between the screw 22 and the frame 1, and the power guide mechanism can drive the screw 22 to move upward or downward.

[0049] When the first brewing head 14 is located at the second position, the brewing tank 11 is closed, and the screw 22 is driven by the power guide mechanism to move Fig.16 Exercise to Fig.17 state, and then the liquid is transported into the brewing tank 11 to brew the coffee.

[0050] As a guiding implementation method, the power guiding mechanism includes a second motor 19 fixed to the frame 1, the outer circumference of the screw 22 is threadedly connected to the third gear 23, the third gear 23 is rotatably connected to the frame 1, the power output shaft of the second motor 19 is installed with a second gear 18 transmission-connected to the third gear 23, the screw 22 is provided with a first guide hole 24 along its length direction, the support shaft 30 passes through the first guide hole 24 and the two are limitedly matched.

[0051] The second motor 19 drives the second gear 18 to rotate, and the second gear 18 drives the third gear 23 to rotate. Since the support shaft 30 passes through the first guide hole 24 and the two are limitedly matched, the screw 22 is prevented from rotating. The screw 22 moves upward or downward under the action of the thread. The device uses the screw 22 to drive the second brewing head 43 to move upward or downward. This structure can increase the diameter of the screw 22 while ensuring a compact structure, avoid the screw 22 and the third gear 23 from slipping, and improve the stability of operation;

[0052] refer to Figure 6 , Figure 7 , Fig.15 The second brewing head 43 includes a first housing 44 and a second filter 26. A second mixing chamber 25 is provided between the second filter 26 and the first housing 44. A liquid inlet channel 20 is provided in the screw 22. The liquid inlet channel 20 has a second end 42 and a first end 21. The second end 42 is connected to the brewing tank 11 through the second mixing chamber 25, and the first end 21 is connected to the water source.

[0053] When brewing or flushing the brewing tank 11, pressurized water is introduced into the first end 21, and the liquid enters the second mixing chamber 25 and the brewing tank 11 through the liquid inlet channel 20 to perform coffee brewing and subsequent flushing. The device integrates the liquid inlet channel 20 in the screw 22, and the flow channel can be connected when the screw 22 and the second brewing head 43 are assembled. Not only is the assembly simple, but no additional external pipelines are required, and the structure is more miniaturized.

[0054] refer to Fig.15 , Figure 7 The first brewing head 14 includes a second shell 45 and a first filter element 15. A first mixing chamber 16 is provided between the second shell 45 and the first filter element 15. The second shell 45 is provided with a drainage channel 39. The drainage channel 39 has a third end 40 and a fourth end 41. The fourth end 41 can be connected to the brewing tank 11 through the first mixing chamber 16.

[0055] When brewing coffee or rinsing, the first brewing head 14 closes the brewing tank 11, and the fluid passes through the liquid inlet channel 20, the second mixing chamber 25, the brewing tank 11, the first mixing chamber 16, and the discharge channel 39 in sequence and is discharged from the third end 40, so that the discharge channel is integrated in the first brewing head 14, which is not only simple to assemble, but also does not require additional external pipelines, and makes the structure more miniaturized.

[0056] The frame 1 is fixedly mounted with a liquid outlet 38, which is connected to the third end 40 via a quick-connect connector and a hose; and / or, the frame 1 is fixedly mounted with a liquid inlet 37, which is connected to the first end 21 via a quick-connect connector and a hose.

[0057] The brewing components of this device do not require external pipelines, are easy to disassemble and clean, and only need to be aligned with the quick-insertion position during installation.

[0058] After the coffee is brewed, the residue needs to be discharged. As an implementation mode, the coffee machine includes a residue pusher 9, and the linkage mechanism also has a third station. According to the running time, the third station is located between the first station and the second station. When the linkage mechanism is in the first station, the residue pusher 9 opens the brewing tank 11. When the linkage mechanism moves from the first station to the third station, the residue pusher 9 passes through the top of the brewing tank 11.

[0059] The linkage mechanism of this device also integrates a third station. When working, the linkage mechanism moves to the first station after brewing is completed. Fig.18 , Fig.19 , Fig. 20 , the second brewing head 43 moves upward to push out the dregs, and then the linkage mechanism moves to the third station. When the linkage mechanism moves from the first station to the third station, the slag pushing member 9 passes through the top of the brewing trough 11 and pushes the dregs onto the slide 13, completing the dregs pushing function.

[0060] A third slide rail 12 is provided above the frame 1, the slag pusher 9 has a second slide rail 8 that is slidably matched with the third slide rail 12, the slag pusher 9 has a vertically arranged first slide rail 7, the first slide rail 7 is movably limited and installed with a first guide member 6, and the first guide member 6 is assembled with the support frame 5; and / or the frame 1 has a slide slope 13 on one side away from the first brewing head 14, and the slag pusher 9 can push the waste to the slide slope 13;

[0061] This device only needs to operate the transmission frame 2. After the first brewing head 14 closes the brewing tank 11, the second brewing head 43 gradually rises under the drive of the second motor 19 to achieve compression of the coffee powder. The appropriate stop position can be set through testing. When the coffee extraction is completed, the second brewing head 43 continues to rise and pushes out the coffee grounds. Then the first motor 17 pushes the grounds and resets. Finally, the second motor 19 reverses and the second brewing head 43 returns to the original position to complete the entire coffee extraction process.

[0062] The device has a simple structure, a small number of parts, stable and accurate operation, and is not easy to damage.

[0063] And / or the slag pusher 9 has a concave wall portion adapted to the brewing tank 11, and a retaining ring 10 extends from the end of the concave wall portion. Figure 1 The device is provided with a retaining ring 10, which is conducive to the coffee powder falling from top to bottom to enter the brewing tank 11 more accurately.

[0064] As a movement mode of the transmission frame 2, the linkage mechanism includes a first motor 17 fixed to the frame 1, the power output shaft of the first motor 17 is installed with a first gear 4, the transmission frame 2 has a gear portion 3 coaxially arranged with the support shaft 30, and the gear portion 3 is meshed with the transmission frame 2. The first motor 17 drives the first gear 4 to rotate, so that the transmission frame 2 rotates forward or reversely.

[0065] As an implementation mode, the size range of the brewing tank 11 of the device is: depth 18mm-55mm, diameter 40mm-52mm, screw size diameter φ30mm-φ38mm, height 140mm, and supports powder quantity of 10-35 grams.

[0066] After a lot of experiments, the device has optimized the size of the brewing tank 11 and the screw size to better meet the conditions of optimal motor power output, reasonable water pressure brewing, etc. The increase in pressure is a huge challenge to the power of the motor. If the thickness is only increased, the extraction of the compacted powder is also a huge challenge. If the pressure is low, it may not penetrate the powder.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solution, conception, and design obtained by equivalent replacement or modification of the technical solution and inventive concept of the present invention by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A coffee machine, characterized in that: The invention comprises a frame (1), a barrel portion (36) located on the frame (1), a first brewing head (14) located on the frame (1), and a linkage mechanism, wherein the barrel portion (36) has a brewing tank (11) with an open upper end, the linkage mechanism has at least a first working position and a second working position, when the linkage mechanism is in the first working position, the first brewing head (14) opens the brewing tank (11), and when the linkage mechanism is in the second working position, the first brewing head (14) closes the brewing tank (11), and the linkage mechanism comprises a transmission frame (2), and when the transmission frame (2) moves in a rotation direction, the linkage mechanism can move from the first working position to the second working position.

2. A coffee machine according to claim 1, characterized in that: The linkage mechanism comprises a support shaft (30) mounted on the frame (1), a transmission frame (2) mounted on the support shaft (30), and a support frame (5) movably connected to the support shaft (30); the first brewing head (14) is mounted on one end of the support frame (5) away from the support shaft (30); the support frame (5) is located between the first brewing head (14) and the support shaft (30) and is provided with a second guide member (28); the second guide member (28) comprises a first portion (34) and a second portion (35); the transmission frame (2) is provided with a first limiting groove (27); the frame (1) is provided with a third guide hole (31); the first portion (34) is limitedly mounted in the third guide hole (31); the second portion (35) is limitedly mounted in the first limiting groove (27); rotating the transmission frame (2) can cause the second guide member (28) to be linked in the first limiting groove (27) and the third guide hole (31), so that the linkage mechanism moves to the first working position and the second working position.

3. A coffee machine according to claim 2, characterized in that: The third guide hole (31) comprises a first hole portion (32) and a second hole portion (33) which are connected to each other, the first hole portion (32) is an arc-shaped structure with the axis of the support shaft (30) as the center, the second hole portion (33) is located at one end of the first hole portion (32) and extends radially toward the support shaft (30) along the support shaft (30), the first limiting groove (27) is non-radially arranged along the support shaft (30), and one end of the first limiting groove (27) is close to the support shaft (30) and the other end is away from the support shaft (30); And / or, the support frame (5) has a second guide hole (29) at one end away from the first brewing head (14), the second guide hole (29) is arranged along a line between the second guide member (28) and the support shaft (30), and the support shaft (30) is movably limited in the second guide hole (29).

4. A coffee machine according to any one of claims 2-3, characterized in that: The frame (1) is provided with a brewing mechanism, the brewing mechanism comprising a screw (22) arranged axially along the barrel (36), a second brewing head (43) being installed at the top end of the screw (22), the second brewing head (43) being installed in a sliding seal in the brewing tank (11), a power guide mechanism being provided between the screw (22) and the frame (1), the power guide mechanism being capable of driving the screw (22) to move upward or downward.

5. A coffee machine according to claim 4, characterized in that: The power guide mechanism comprises a second motor (19) fixed to the frame (1); the outer circumference of the screw rod (22) is threadedly connected to a third gear (23); the third gear (23) is rotatably connected to the frame (1); a second gear (18) is installed on the power output shaft of the second motor (19) and is transmission-connected to the third gear (23); a first guide hole (24) is opened along the length direction of the screw rod (22); the support shaft (30) passes through the first guide hole (24) and the two are limitedly matched.

6. The coffee machine according to claim 4, characterized in that: The second brewing head (43) comprises a first housing (44) and a second filter (26); a second mixing chamber (25) is provided between the second filter (26) and the first housing (44); a liquid inlet channel (20) is provided in the screw (22); the liquid inlet channel (20) comprises a second end (42) and a first end (21); the second end (42) is connected to the brewing tank (11) through the second mixing chamber (25); and the first end (21) is connected to a water source; And / or, the first brewing head (14) comprises a second outer shell (45) and a first filter element (15), a first mixing chamber (16) is provided between the second outer shell (45) and the first filter element (15), the second outer shell (45) is provided with a drainage channel (39), the drainage channel (39) has a third end (40) and a fourth end (41), and the fourth end (41) can be connected to the brewing tank (11) through the first mixing chamber (16).

7. A coffee machine according to claim 6, characterized in that: The frame (1) is fixedly provided with a liquid outlet (38), and the liquid outlet (38) is connected to the third end (40) via a quick-connect connector and a hose; And / or, the frame (1) is fixedly mounted with a liquid inlet component (37), and the liquid inlet component (37) is connected to the first end (21) via a quick-connect connector and a hose.

8. A coffee machine according to any one of claims 2, 3, 5, 6 and 7, characterized in that: The coffee machine comprises a slag pusher (9), and the linkage mechanism further comprises a third station. According to the operation time, the third station is located between the first station and the second station. When the linkage mechanism is in the first station, the slag pusher (9) opens the brewing tank (11). When the linkage mechanism moves from the first station to the third station, the slag pusher (9) passes the top of the brewing tank (11).

9. A coffee machine according to claim 8, characterized in that: The frame (1) has a third slide rail (12) above, the slag pusher (9) has a second slide rail (8) slidably matched with the third slide rail (12), the slag pusher (9) has a vertically arranged first slide rail (7), the first slide rail (7) is movably limited and installed with a first guide member (6), and the first guide member (6) is assembled with the support frame (5); and / or the side of the frame (1) away from the first brewing head (14) has a slide (13), and the slag pusher (9) can push the waste to the slide (13); And / or the slag pushing member (9) has a concave wall portion adapted to the brewing tank (11), and a retaining ring (10) extends from the end of the concave wall portion.

10. A coffee machine according to any one of claims 2, 3, 5, 6, 7 and 9, characterized in that: The linkage mechanism comprises a first motor (17) fixed to the frame (1), a first gear (4) being installed on the power output shaft of the first motor (17), the transmission frame (2) having a gear portion (3) coaxially arranged with the support shaft (30), the gear portion (3) meshing with the transmission frame (2) for transmission; And / or, the size range of the brewing tank (11) is: depth 18mm-55mm, diameter 40mm-52mm.

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