A brewing assembly for a coffee maker

Abstract

A kind of brewing assembly of coffee machine, including body, brewing seat, the brewing seat is arranged on body, and its lower part is used to connect extraction bowl;Powder structure, the powder structure is movably arranged on brewing seat and is used to flatten coffee powder in extraction bowl;Drive structure, the drive structure is arranged between brewing seat and powder structure and is used to drive powder structure to move along the direction of brewing seat up and down;Water delivery structure, the water delivery structure is respectively connected with hot water source and extraction bowl and is used to deliver hot water to extraction bowl;Heating device, the heating device is arranged on brewing seat and is used to heat and keep hot water hot.This utility model provides a kind of brewing assembly of coffee machine, it can guarantee the hot water temperature in extraction bowl reaches the extraction temperature of coffee, to a certain extent, can guarantee the extraction quality of coffee machine.

Description

Technical Field

[0001] This utility model belongs to the technical field of coffee machines, specifically relating to a coffee machine brewing assembly. Background Technology

[0002] In the field of existing coffee machine technology, especially fully automatic coffee machines, the brewing assembly is one of the core working components of a fully automatic coffee machine, which has functions such as dispensing coffee powder, tamping coffee powder, and brewing. Patent document CN119014708A discloses a grinding and tamping mechanism and an extraction machine, including a main unit, an extraction hopper, a grinding assembly, a tamping head, and a lifting drive assembly. The main unit has a support position; the extraction hopper is detachably installed in the support position; the grinding assembly is installed inside the main unit and is used to grind coffee beans or tea leaves, and has a powder outlet through which the powder enters the extraction hopper; the tamping head is installed above the support position, and has a water inlet for introducing brewing water into the tamping head, and a water outlet at the bottom of the tamping head; the lifting drive assembly is connected to the tamping head and is used to lift... The tamping head is lowered by a lifting drive assembly, pressing it into the extraction chamber to flatten the coffee or tea powder. Simultaneously, brewing water from the tamping head flows into the extraction chamber through the outlet. However, the problem lies in the fact that in this grinding and tamping mechanism, the brewing water is prone to heat exchange with the external environment during the process of being transported from the hot water source to the extraction chamber. This leads to a loss of water temperature, especially in low ambient temperatures. The brewing water entering the extraction chamber may not reach the required extraction temperature for the coffee, resulting in a weak, acidic taste and negatively impacting the quality of the extracted coffee.

[0003] Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to overcome at least one of the shortcomings of the prior art and to provide a coffee machine brewing assembly that can ensure that the temperature of the hot water in the extraction bowl reaches the extraction temperature of the coffee, thereby ensuring the extraction quality of the coffee machine to a certain extent.

[0005] To achieve the above objectives, the technical solution provided by this utility model embodiment is as follows: A coffee machine brewing assembly, including a body, A brewing base is provided on the machine body, and its lower part is used to connect the extraction bowl; A tamping structure, which is movably mounted on the brewing base and used to flatten the coffee powder in the extraction bowl; A driving structure is provided between the brewing base and the powder pressing structure and is used to drive the powder pressing structure to move along the up and down direction of the brewing base. A water supply structure, wherein the water supply structure is connected to a hot water source and an extraction bowl respectively and is used to supply hot water into the extraction bowl; A heating device is installed on the brewing base and is used to heat and keep hot water warm.

[0006] The brewing base is provided with a brewing channel, which runs vertically through the middle of the brewing base. The powder pressing end of the powder pressing structure extends downward into the extraction bowl through the brewing channel. The water outlet end of the water supply structure delivers hot water into the extraction bowl through the brewing channel. The heating device is located around the brewing channel and heats the brewing base to enable heat exchange between the brewing base and the hot water.

[0007] The brewing base is also provided with a mounting groove for installing a heating device, a locking component for locking the heating device in the mounting groove, and a cover plate for protecting the heating device. The mounting groove is annular and surrounds the outside of the brewing channel with its opening facing downwards from the brewing base. The locking component is located in the mounting groove, and the cover plate covers the opening of the mounting groove. The heating device is a heating tube, heating wire, or thick film heater.

[0008] The powder pressing structure includes a powder pressing substrate, a powder pressing connecting post, and a powder pressing head. The powder pressing substrate is movably mounted on the brewing base via a driving structure. The powder pressing connecting post is located on the bottom surface of the powder pressing substrate, and the powder pressing head is located at the lower end of the powder pressing connecting post.

[0009] A guide structure is provided between the powder pressing structure and the brewing base, which enables the powder pressing structure to move relative to the brewing base in the vertical direction. The guiding structure includes a guide sleeve disposed on the powder pressing structure and a guide post disposed on the brewing base and corresponding to the guide sleeve. The guide sleeve is disposed through the powder pressing substrate, and the guide post is disposed on the top surface of the brewing base. When the powder pressing structure is disposed on the brewing base, the guide sleeve is fitted onto the guide post and moves back and forth along the length of the guide post, so that the powder pressing structure moves relative to the brewing base in the up and down direction.

[0010] The water conveying structure includes a water channel and an inlet and an outlet connecting the water channel. The water channel is located inside the powder pressing connecting column. The inlet is located on the powder pressing connecting column and on the upper part of the side wall of the powder pressing connecting column to connect to a hot water source. The outlet is located on the powder pressing head and on the bottom surface of the powder pressing head to deliver hot water into the extraction bowl.

[0011] The powder pressing head is equipped with a water filter screen and a sealing component. The water filter screen is set on the bottom surface of the powder pressing head to filter the hot water output to the extraction bowl, and the sealing component is set on the side wall of the powder pressing head to seal the gap between the powder pressing head and the brewing channel.

[0012] The drive structure includes a drive motor, a lead screw assembly, and a transmission structure. The drive motor is mounted on the machine body. The lead screw portion of the lead screw assembly is rotatably mounted on the brewing base. The slider portion of the lead screw assembly is fixed on the powder pressing structure. The lead screw portion of the lead screw assembly is connected to the output end of the drive motor through the transmission structure. The transmission structure is a belt drive structure, a chain drive structure, or a gear drive structure.

[0013] The drive structure also includes a fixing plate for fixing the drive motor, which is disposed on the machine body and located above the brewing base; The brewing assembly also includes a powder dispensing component for adding coffee powder into the extraction bowl. The powder dispensing component is hinged to a fixed plate and has a powder outlet located at the bottom. When the coffee machine dispenses coffee powder, the powder outlet is located above the brewing channel to add coffee powder into the extraction bowl. When the coffee machine tamps coffee powder, the powder outlet is offset from the brewing channel to prevent the tamping structure from descending.

[0014] The brewing assembly also includes a housing to protect the brewing base, the powder pressing structure, the drive structure and the heating device. The housing has a receiving cavity and a first opening and a second opening that connect the receiving cavity. The first opening is located on the bottom surface of the housing, and the second opening is located on the side wall of the housing and faces the body and is connected to the first opening.

[0015] The beneficial effects of this utility model are as follows: This invention, through the brewing assembly employing the aforementioned technical solution, heats the hot water passing through the brewing base using a heating device. This reduces temperature loss during the water transport and extraction processes, ensuring the hot water remains at the extraction temperature for coffee. This avoids the problem of insufficient extraction in coffee machines, allowing the flavor compounds in the coffee powder to be fully released, resulting in a richer and more delicious coffee, and guaranteeing the extraction quality of the coffee. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a coffee machine according to an embodiment of the present invention.

[0017] Figure 2 This is a cross-sectional view of a brewing assembly according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram showing the outer shell separating from the brewing assembly in one embodiment of the present invention.

[0019] Figure 4 This is an exploded view of a brewing assembly according to an embodiment of the present invention.

[0020] Figure 5 This is an exploded view of a brewing assembly according to an embodiment of the present invention.

[0021] Figure 6This is an exploded view of the brewing base and heating device according to an embodiment of the present invention.

[0022] Figure 7 This is an exploded view of the pressing structure of an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] See Figure 1-7The brewing assembly of this coffee machine includes a body 1, which is mounted on the front side of the body 1. The brewing assembly includes a housing 8, a brewing base 2, a tamping structure 3, a drive structure 4, a water supply structure 5, and a heating device 6. In this embodiment, the housing 8 is mounted on the body 1 by fastening components and has a receiving cavity 801, a first opening 802, and a second opening 803. The first opening 802 is located on the bottom surface of the housing 8 and communicates with the receiving cavity 801. The second opening 803 is located on the side wall of the housing 8 and communicates with the receiving cavity 801. The second opening 803 faces the body 1 and is connected to the first opening 802. The brewing base 2, the tamping structure 3, and the drive structure 5 are connected through the first opening 802. The tamping structure 3, the driving structure 4, and the heating device 6 are installed in the receiving cavity 801, which can protect the tamping structure 3, the driving structure 4, and the heating device 6. The second opening 803 allows the outer casing 8 to avoid the pipes, powder path, and wiring between the brewing assembly and the machine body 1, ensuring that the outer casing 8 is properly installed. The brewing base 2 is installed on the machine body 1 by fastening components, and its lower part can be connected to the extraction bowl, ensuring that the extraction bowl is fixed to the brewing assembly and preventing accidental leakage of the beverage due to displacement of the extraction bowl during coffee extraction. The brewing base 2 is provided with a brewing channel 201, which runs vertically through the middle of the brewing base 2. When the extraction bowl is connected to the brewing base 2, the inner cavity of the extraction bowl and the brewing channel 201 are connected. 01. The tamping structure 3 is movably mounted on the brewing base 2. Its tamping end extends downward into the extraction bowl through the brewing channel 201 to flatten the coffee grounds in the extraction bowl, ensuring a more uniform distribution density of the coffee grounds. The driving structure 4 is located between the brewing base 2 and the tamping structure 3 to drive the tamping structure 3 to move vertically along the brewing base 2, allowing the tamping structure 3 to be movably mounted on the brewing base 2. The water supply structure 5 is located inside the tamping structure 3 and connects to the hot water source and the extraction bowl respectively. Its outlet delivers hot water into the extraction bowl through the brewing channel 201, enabling the hot water from the hot water source to be delivered into the extraction bowl for extraction of the coffee grounds. The heating device 6 is installed on the brewing base 2 and located around the brewing channel 201. It enables indirect and uniform heat exchange between the brewing base 2 and the hot water. The brewing base 2 acts as a heat conduction carrier. The heating device 6 heats the brewing base 2 and can evenly transfer heat to the hot water in the channel to heat and keep the hot water delivered to the extraction bowl. This avoids the problem of local overheating of traditional external heating tubes, reduces the temperature loss of hot water during transportation and extraction, and keeps the hot water at the temperature required for coffee extraction. This avoids the problem of insufficient extraction by the coffee machine, allows the flavor substances in the coffee powder to be fully released, and results in a more mellow and delicious coffee, ensuring the quality of coffee extraction.

[0025] Furthermore, in this embodiment, the brewing base 2 is also provided with a mounting groove 202, a locking component 203, and a cover plate 204. Specifically, the mounting groove 202 is annular and surrounds the brewing channel 201, with its opening facing downwards from the brewing base 2. The inner cavity size of the mounting groove 202 matches the size of the heating device 6, allowing the heating device 6 to be embedded in the mounting groove 202. This achieves the heating device 6 being annularly positioned on the brewing base 2, so that the heating device 6, such as the heating tube, heating wire, and thick film heater, wraps around the brewing channel 201 in a ring, preventing localized excessive water temperature and ensuring uniform heating of the brewing base 2 by the heating device 6. The locking component 203 is preferably an elastic locking ring. When the heating device 6 is installed in the mounting groove 202, the locking component 203 is engaged in the mounting groove 202 and fixes the heating device 6 in the mounting groove 202, ensuring that the heating device 6 is securely installed. On the brewing base 2, to prevent the heating device 6 from shifting due to equipment vibration and to ensure stable heat exchange efficiency during long-term use, the outer edge dimension of the cover plate 204 is slightly larger than the inner radial dimension of the mounting groove 202. When the cover plate 204 is placed on the opening of the mounting groove 202, the cover plate 204 and the mounting groove 202 are interference-fitted, so that the cover plate 204 covers the opening of the mounting groove 202, thereby sealing the opening of the mounting groove 202. The enclosed space formed in the mounting groove 202 reduces heat loss to the outside and improves the heat preservation effect of hot water, which can reduce the energy consumption of the heating device 6 to a certain extent. The heating device 6 is a heating tube, heating wire, or thick film heater. The appropriate heating device 6 can be selected according to different usage scenarios and different volume requirements of the coffee machine, so that the brewing assembly can adapt to different scenario requirements and improve the design flexibility of the coffee machine, which can be understood by those skilled in the art.

[0026] Furthermore, in this embodiment, the tamping structure 3 includes a tamping base plate 301, a tamping connecting post 302, and a tamping head 303. Specifically, the tamping base plate 301 is movably mounted on the brewing base 2 via a driving structure 4. The tamping connecting post 302 is hollow and fixed to the bottom surface of the tamping base plate 301 by a fastening component. The tamping head 303 is fixed to the lower end of the tamping connecting post 302 via a fastening connection structure. Through the above technical solution, the tamping structure 3 adopts a three-section rigid structure design, reducing the pressure loss caused by deformation of the traditional single tamping rod under force, ensuring that the pressure of the tamping head 303 on the coffee powder is evenly distributed, and realizing the uniform transmission of tamping force. As a component that directly contacts the coffee powder, the tamping head 303 can be customized in size according to the shape of the extraction bowl, avoiding coffee powder leakage caused by excessive gap between the traditional tamping component and the bowl wall of the extraction bowl. At the same time, it ensures that the edge and center density of the coffee powder layer are consistent, improving the stability of extraction quality. This is understood by those skilled in the art.

[0027] Furthermore, a guide structure is provided between the tamping structure 3 and the brewing base 2. Specifically, in this embodiment, the guide structure includes a guide sleeve 304 and a guide post 205. The guide sleeve 304 is disposed on the tamping structure 3, and preferably there are four of them, which are evenly distributed on the tamping base plate 301. The guide post 205 is disposed on the brewing base 2, and preferably there are four of them, which are evenly distributed on the top surface of the brewing base 2. When the tamping structure 3 is disposed on the brewing base 2, the guide sleeve 304 is fitted onto the guide post 205 and moves back and forth along the length of the guide post 205, so that the tamping structure 3 moves up and down relative to the brewing base 2. Through the above technical solution, the tamping structure 3 is forced to move up and down along the length of the guide post 205, ensuring that the tamping head 303 can accurately extract the center of the extraction bowl each time, further ensuring that the coffee powder in the extraction bowl is evenly compressed, which can be understood by those skilled in the art.

[0028] Furthermore, the water conveying structure 5 includes a water channel 501, an inlet 502, and an outlet 503. Specifically, in this embodiment, the water channel 501 is disposed within the hollow portion of the powder pressing connecting column 302. The water channel 501 extends directly from the upper end of the powder pressing connecting column 302 to the bottom surface of the powder pressing head 303, reducing the heat exchange path between the hot water in the water conveying structure 5 and the external environment, thus reducing the temperature loss of the hot water. Moreover, since the water channel 501 is integrated within the powder pressing connecting column 302, no additional water supply pipeline is required, simplifying the structure within the brewing assembly. The inlet 502 is located at the inlet 503. The water inlet 503 is placed on the tamping head 303 and located on the upper part of the side wall of the tamping head 302 and connected to the water channel 501. The water inlet 502 connects the water supply structure 5 to the hot water source. The water outlet 503 is set on the tamping head 303 and located on the bottom surface of the tamping head 303 and connected to the water channel 501. The water outlet 503 delivers hot water into the extraction bowl. The water outlet 503 is designed with a multi-microporous structure or a cross-shaped structure, so that hot water is sprayed directly and evenly from the tamping head 303 onto the surface of the coffee grounds, which can improve the coffee extraction effect to a certain extent, as can be understood by those skilled in the art.

[0029] Furthermore, the tamping head 303 is provided with a water filter 305 and a sealing component 306. Specifically, in this embodiment, the water filter 305 is preferably made of stainless steel and fixed to the bottom surface of the tamping head 303 by an installation structure. The water filter 305 has several water filter holes, which are evenly distributed on the water filter 305 to filter the hot water output to the extraction bowl. This effectively filters out scale and pipe impurities in the hot water, ensuring the extraction quality of the coffee. The sealing component 306 is preferably a sealing ring made of high-temperature resistant material and is provided on the side wall of the tamping head 303. Preferably, two powder press heads 303 are arranged vertically at intervals to seal the gap between the powder press head 303 and the brewing channel 201. When the powder press head 303 presses powder, the sealing component 306 makes the side wall of the powder press head 303 fit tightly against the inner wall of the brewing channel 201, preventing hot water leakage during high-pressure extraction and ensuring that the extraction pressure is stable within the optimal range. The sealing component 306 fills the gap between the powder press head 303 and the brewing channel 201, reducing heat loss from the gap and helping to maintain a stable hot water temperature in the brewing channel 201. This is something that those skilled in the art can understand.

[0030] Furthermore, the drive structure 4 includes a drive motor 401, a lead screw component 402, a transmission structure, and a fixing plate 403. Specifically, in this embodiment, the drive motor 401 is mounted on the fixing plate 403 via fastening components. The fixing plate 403 is mounted on the front side of the machine body and located above the brewing base 2 via fastening components. The lead screw component 402 is preferably a ball screw, which includes a lead screw portion and a slider portion. The lead screw portion of the lead screw component 402 is rotatably mounted on the brewing base 2 and the fixing plate 403. Bearings are provided between the lead screw component 402 and the brewing base 2 and the fixing plate 403 to ensure smoother rotation of the lead screw portion of the lead screw component 402 relative to the brewing base 2 and the fixing plate 403. The slider portion of the lead screw component 402 is fixed to the powder pressing structure 3 via fastening components. The ball screw has high transmission accuracy and can... By precisely adjusting the descent stroke and tamping force of the tamping head 303 through controlling the motor speed, it can adapt to different types of coffee powder, making the brewing assembly more adaptable. Furthermore, the linear motion of the ball screw transmission results in low operating noise, making it suitable for quiet environments such as homes and offices. The upper end of the ball screw component 402 is connected to the output end of the drive motor 401 via a transmission structure, allowing the drive motor 401 to drive the ball screw component 402 to rotate clockwise or counterclockwise, thereby driving the slider portion of the ball screw component 402 to slide back and forth in the up-and-down direction. The transmission structure can be a belt drive, chain drive, or gear drive, allowing for selection of different transmission structures based on the internal space of the coffee machine, improving the design flexibility of the coffee machine. The transmission structure also buffers the power impact when the drive motor 401 starts / stops, avoiding rigid impact caused by direct connection between the drive motor 401 and the ball screw component 402, reducing wear on the ball screw component 402, and extending its service life, as will be understood by those skilled in the art.

[0031] Furthermore, the brewing assembly also includes a powder dispensing component 7. Specifically, in this embodiment, the upper end of the powder dispensing component 7 is mounted on the fixed plate 403 via a hinge structure, allowing the powder dispensing component 7 to swing back and forth along the front-to-back direction of the coffee machine. The powder dispensing component 7 is provided with a powder outlet 701, which is located at the lower part of the powder dispensing component 7. When the coffee machine dispenses powder, the powder dispensing component 7 swings forward under its own weight, causing the powder outlet 701 to move above the brewing channel 201, ensuring that the coffee powder can be accurately added to the extraction bowl. When the coffee machine tamps the powder, the powder dispensing component 7 swings backward under the push of the tamp structure 3, and the powder outlet 701 moves and deviates from the brewing channel 201 to avoid the tamp structure descending, thus avoiding interference between the tamp structure 3 and the powder dispensing component 7, improving the operational safety of the coffee machine, and realizing the automatic coordinated operation of powder dispensing and tamping of the coffee machine without the need for manual movement of the powder dispensing component 7, thereby improving the automation level of the coffee machine, which can be understood by those skilled in the art.

[0032] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A coffee machine brewing assembly, comprising a body (1), characterized in that: Brewing base (2), which is disposed on the body (1), and its lower part is used to connect the extraction bowl; The tamping structure (3) is movably mounted on the brewing base (2) and used to flatten the coffee powder in the extraction bowl; The driving structure (4) is disposed between the brewing base (2) and the powder pressing structure (3) and is used to drive the powder pressing structure (3) to move up and down along the brewing base (2); Water supply structure (5), wherein the water supply structure (5) is connected to the hot water source and the extraction bowl respectively and is used to supply hot water into the extraction bowl; Heating device (6), which is set on the brewing base (2) and used to heat and keep hot water warm.

2. The coffee brewing assembly according to claim 1, characterized in that, The brewing base (2) is provided with a brewing channel (201), which runs vertically through the middle of the brewing base (2). The powder pressing end of the powder pressing structure (3) extends downward into the extraction bowl through the brewing channel (201). The water outlet of the water supply structure (5) delivers hot water into the extraction bowl through the brewing channel (201). The heating device (6) is located around the brewing channel (201) and heats the brewing base (2) to allow the brewing base (2) to exchange heat with the hot water.

3. The coffee brewing assembly according to claim 2, characterized in that, The brewing base (2) is also provided with a mounting groove (202) for installing a heating device (6), a locking component (203) for locking the heating device (6) in the mounting groove (202), and a cover plate (204) for protecting the heating device (6). The mounting groove (202) is annular and surrounds the brewing channel (201) with its opening facing the bottom of the brewing base (2). The locking component (203) is located in the mounting groove (202), and the cover plate (204) covers the opening of the mounting groove (202). The heating device (6) is a heating tube, heating wire, or thick film heater.

4. The coffee brewing assembly according to claim 2, characterized in that, The powder pressing structure (3) includes a powder pressing substrate (301), a powder pressing connecting post (302), and a powder pressing head (303). The powder pressing substrate (301) is movably mounted on the brewing base (2) via a driving structure (4). The powder pressing connecting post (302) is mounted on the bottom surface of the powder pressing substrate (301), and the powder pressing head (303) is mounted at the lower end of the powder pressing connecting post (302).

5. The coffee brewing assembly according to claim 4, characterized in that, A guide structure is provided between the powder pressing structure (3) and the brewing base (2), and the powder pressing structure (3) can be moved in the vertical direction relative to the brewing base (2) through the guide structure; The guiding structure includes a guide sleeve (304) disposed on the powder pressing structure (3) and a guide post (205) disposed on the brewing base (2) and corresponding to the guide sleeve (304). The guide sleeve (304) is disposed through the powder pressing substrate (301), and the guide post (205) is disposed on the top surface of the brewing base (2). When the powder pressing structure (3) is disposed on the brewing base (2), the guide sleeve (304) is fitted onto the guide post (205) and moves back and forth along the length direction of the guide post (205), so that the powder pressing structure (3) moves relative to the brewing base (2) in the up and down direction.

6. The coffee brewing assembly according to claim 4, characterized in that, The water conveying structure (5) includes a water conveying channel (501) and an inlet (502) and an outlet (503) connecting the water conveying channel (501). The water conveying channel (501) is located inside the powder pressing connecting column (302). The inlet (502) is located on the powder pressing connecting column (302) and on the upper part of the side wall of the powder pressing connecting column (302) to connect to a hot water source. The outlet (503) is located on the powder pressing head (303) and on the bottom surface of the powder pressing head (303) to deliver hot water into the extraction bowl.

7. The brewing assembly of the coffee machine according to claim 6, characterized in that, The powder pressing structure (3) also includes a water filter (305) and a sealing component (306). The water filter (305) is disposed on the bottom surface of the powder pressing head (303) to filter the hot water output to the extraction bowl. The sealing component (306) is disposed on the side wall of the powder pressing head (303) to seal the gap between the powder pressing head (303) and the brewing channel (201).

8. The brewing assembly of the coffee machine according to claim 2, characterized in that, The drive structure (4) includes a drive motor (401), a lead screw component (402), and a transmission structure. The drive motor (401) is mounted on the machine body. The lead screw part of the lead screw component (402) is rotatably mounted on the brewing base (2). The slider part of the lead screw component (402) is fixed on the powder pressing structure (3). The lead screw part of the lead screw component (402) is connected to the output end of the drive motor (401) through the transmission structure. The transmission structure is a belt drive structure, a chain drive structure, or a gear drive structure.

9. The brewing assembly of the coffee machine according to claim 8, characterized in that, The drive structure (4) also includes a fixing plate (403) for fixing the drive motor (401), the fixing plate (403) is disposed on the body and located above the brewing base (2); The brewing assembly also includes a powder dispensing component (7) for adding coffee powder into the extraction bowl. The powder dispensing component (7) is hinged to a fixed plate (403). The powder dispensing component (7) is provided with a powder outlet (701). The powder outlet (701) is located at the lower part of the powder dispensing component (7). When the coffee machine dispenses coffee powder, the powder outlet (701) is located above the brewing channel (201) so that the coffee powder is added into the extraction bowl. When the coffee machine tamps the coffee powder, the powder outlet (701) is offset from the brewing channel (201) to avoid the tamping structure from descending.

10. The brewing assembly of the coffee machine according to any one of claims 1-9, characterized in that, The brewing assembly also includes a housing (8) to protect the brewing base (2), the powder pressing structure (3), the drive structure (4) and the heating device (6). The housing (8) is provided with a receiving cavity (801) and a first opening (802) and a second opening (803) connecting the receiving cavity (801). The first opening (802) is located on the bottom surface of the housing (8), and the second opening (803) is located on the side wall of the housing (8) and faces the body (1) and is connected to the first opening (802).

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