Hook claw type coffee machine brewing device

Abstract

The invention relates to a hook claw type coffee machine brewing device, and aims to solve the technical problems of poor stability, long stroke, high cost and large size easily caused by screw part connection and gear assembly top structure design of the existing similar products. The brewing device is characterized in that guide grooves are symmetrically formed in the two sides of a threaded section at a screw assembly of the brewing device, a deep groove is formed in one end of a brewing base assembly of each guide groove, a shallow groove is formed in the guide groove at the threaded section of the screw assembly, and the other end of a hook of a hook claw assembly bends towards the inner side of a hook head and is provided with a roller. Hook heads of the hook claw assemblies respectively keep one ends of the hook heads open outwards under the action of torsional springs, bent heads at the other ends of the hook heads abut against the outer diameter of the screw assembly, and meanwhile positioning columns on the two sides of a center hole in the shell are inserted into guide grooves in the two sides of a threaded section of the screw assembly to be positioned and move up and down. When the screw assembly is screwed into the brewing barrel under the action of the stepping motor, the rolling wheel is located in the shallow groove, and the hook head of the hook is correspondingly buckled with the hook head groove in the outer flanging position of the barrel opening of the brewing barrel in shape.

Description

Technical Field

[0001] The invention relates to a brewer of a coffee machine, in particular to a hook-claw type brewer of a coffee machine. Background Art

[0002] A coffee machine is a household appliance or commercial appliance that automatically makes coffee, integrating the entire process of grinding, pressing, filling, brewing, and removing residues. The core component of some existing fully automatic coffee machines is a brewer, which is used for receiving powder, pressing, brewing, brewing, and removing residues. It generally consists of two parts: a brewing barrel assembly and a brewing head assembly. The powder pressing and brewing mechanism is arranged on the brewing head assembly. When the brewing barrel assembly is located on one side, powder is received. When the barrel body of the brewing barrel assembly rotates to the side of the brewing set assembly, after pressing, brewing, brewing, and removing residues, the barrel body of the brewing barrel assembly returns to the powder receiving side to wait for the next powder receiving. Some existing coffee machine brewers of this type use large gears and screws to rotate and move up and down, such as the application number 202410298852.7 disclosed in the Chinese patent literature, the application publication date 2024.05.07, and the invention name "large-dose coffee machine automatic extraction and brewing brewer"; other coffee machine brewers of this type use a hook-type structure design, such as the application number 202410707362.8 disclosed in the Chinese patent literature, the application publication date 2024.08.02, and the invention name "coffee machine brewer pressed powder brewing and brewing device"; the above structure realizes the locking hook to engage or disengage with the barrel mouth of the brewing barrel and the pushing head of the screw is sealed with the barrel mouth of the brewing barrel when the screw and the push head are connected as one body in the shell when moving up and down, and the pressing of the powder in the brewing barrel is mainly achieved by the push rod in the brewing barrel; but the locking hook is kept in the engaged position, which is prone to jamming, etc., and its production and assembly are inconvenient, the production cost is high, and the volume occupies a large area. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a hook-type coffee machine brewer in the art, which can solve the technical problems that the existing similar products have poor structural design, resulting in inconvenient production and assembly, high production cost, and large volume, especially the screw component connection and gear assembly top structure design in similar products are prone to poor stability, long stroke, high cost, and large volume. The purpose is achieved through the following technical solutions.

[0004] A hook-claw coffee machine brewer, the brewer comprises a brewing head assembly and a brewing seat assembly, a liquid outlet is arranged in a screw assembly of the brewing head assembly, an O-ring is arranged on the outer diameter of a powder pressing part at one end of the screw assembly, an adjusting gear is arranged on the outer diameter of a threaded section of the screw assembly, the adjusting gear is fixedly arranged in a shell, the outer diameter of the threaded section of the screw assembly in the center hole of the shell is meshed with the inner thread at the inner diameter of the adjusting gear, the outer gear ring on one side of the adjusting gear is meshed with one side of a gear assembly extending into the shell, the driving gear of the gear assembly is connected to the motor shaft of a stepping motor on one side of the shell, and the lower sides of the shell are A hook assembly is symmetrically arranged, and the brewing barrel is arranged in the brewing seat assembly; when the brewing barrel in the brewing seat assembly rotates to one side to align with the screw assembly of the brewing head assembly, the brewing barrel in the brewing seat assembly is lifted by the swing rod in the brewing assembly, and the barrel mouth of the brewing barrel is abutted or aligned with the bottom end face of the shell of the brewing head assembly, and one end of the hook of the hook assembly is engaged with the outer flange at the barrel mouth of the brewing barrel, while the stepping motor drives the screw assembly to move up and down to the brewing barrel through the gear assembly and the adjusting gear to realize powder pressing, and the middle pin shaft at the hook of the hook assembly is respectively provided with a torsion spring. The key points of its structural design are that guide grooves are symmetrically arranged on both sides of the threaded section of the screw assembly, one end of the brewing seat assembly of the guide groove is a deep groove, and the guide groove at the threaded section of the screw assembly is a shallow groove, and the other end of the hook of the hook claw assembly is bent inwardly of the hook head and is respectively provided with a turn head, and the hook head of the hook claw assembly is respectively kept open outward at one end of the hook head by the action of a torsion spring, and the turn head at the other end of the hook head is against the outer diameter of the screw assembly. At the same time, the positioning columns on both sides of the center hole in the shell are inserted into the guide grooves on both sides of the threaded section of the screw assembly for positioning and moving up and down; when the turn head is embedded in the deep grooves of the guide grooves on both sides of the screw assembly, the hook head of the hook is separated from the outer flange of the barrel mouth of the brewing barrel; when the screw assembly is screwed into the brewing barrel by the action of a stepping motor, the turn head is located in the shallow grooves of the guide grooves on both sides of the screw assembly, and the hook head of the hook is buckled with the outer flange of the barrel mouth of the brewing barrel. Therefore, according to the above structure, when the brewing of the compressed powder in the brewing barrel is finished, the screw assembly returns to the initial position, the hook of the hook assembly returns to the deep groove position of the guide groove of the screw assembly, the hook head of the hook of the hook assembly returns to the open state, the hook is separated from the outer flange of the barrel mouth of the brewing barrel, and the brewing barrel is returned to the initial powder receiving position through the swing motor on one side of the brewing seat assembly. A slag guide plate is provided on one side of the barrel mouth of the brewing barrel as needed on one side of the brewing seat assembly, and a powder scraper plate is provided on one side of the brewing head assembly of the brewing seat assembly above the barrel mouth of the brewing barrel at the powder receiving position, and the brewing head assembly is connected to the brewing seat assembly or through an outer diameter connecting plate. At the same time, the screw head and screw sleeve of the above screw assembly are integrally formed, or the following spring is separately built-in to improve its buffering performance and real-time monitoring of the stroke of the second micro switch.

[0005] The screw assembly includes a screw head, a screw sleeve and a spring, the threaded section is arranged on the outer diameter of the screw sleeve of the screw assembly, the outer diameter of one end of the screw head extending out of the screw sleeve is provided with the O-ring, the end face of the screw head is provided with a filter element net, the other end of the screw head in the screw sleeve and the sealing sleeve between the lower inner cavity of the screw sleeve are combined with the spring, one end of the central screw of the upper inner cavity in the screw sleeve is connected to the central column of the screw head in the lower inner cavity, and a second micro switch is provided on one side of the other end of the central screw of the upper inner cavity in the screw sleeve; when the screw head presses the coffee powder in the brewing barrel, the spring is deformed, the screw head is partially retracted into the screw sleeve, and the central screw triggers the second micro switch.

[0006] The outer flange of the barrel mouth of the brewing barrel is square, and the outer flange of the barrel mouth of the brewing barrel is symmetrically provided on both sides of the bottom with outer grooves in the form of upward oblique buckle grooves. The brewing barrel below the outer groove is symmetrically provided with limit columns on both sides. The shape of the outer groove corresponds to the shape of the hook head of the hook assembly. When the limit column for lifting the brewing barrel of the brewing seat assembly is locked with the top shell opening of the outer shell of the brewing seat assembly, the end of the hook head of the hook assembly is provided with a corresponding arc edge. The above structure increases the contact surface and groove shape of the hook head of the hook assembly at the outer flange of the brewing barrel, and the stability of the two when buckled is better.

[0007] The hook assembly is provided with a roller at the turning end, and the roller is longitudinally positioned and rolled in the guide groove of the screw assembly when moving up and down, so that the roller can further limit the position and stabilize the transition between the deep groove and the shallow groove in the guide groove.

[0008] When the stepper motor drives the screw assembly to move into the brewing barrel through the gear assembly and the adjusting gear to achieve powder compression, the push rod at the bottom of the brewing barrel is driven by the transmission motor on one side of the brewing seat assembly to move toward the side of the screw assembly. The above structure is a structural design in which the push rod cooperates with the screw assembly to further move upward to compress the powder, which has a better powder compression effect, and it can also achieve powder compression through the screw assembly alone.

[0009] The first bearing and the second bearing are respectively arranged at the openings at both ends of the screw assembly outer diameter adjusting gear in the housing, and the inner diameters of the inner rings of the first bearing and the second bearing are respectively fitted with the convex rings at the openings at both ends of the adjusting gear. The above structure improves the stability of the adjusting gear rotating in the housing.

[0010] At least one micro switch assembly is provided at the shell on one side of the outer diameter of the screw assembly. When the screw assembly moves to press powder and / or open the hook assembly, the screw assembly triggers the first micro switch of the micro switch assembly. A notch is correspondingly provided at the end of the threaded section of the screw assembly at the moving spring piece of the first micro switch.

[0011] The shell includes a shell base and a shell cover. The top of the shell base and the bottom of the shell cover are connected as a whole through a screw and a nut at the end angle. At the same time, one side of the adjustment gear in the connection is aligned with the openings at the shell base and the shell cover. The outer diameter of the shell base on one side of the opening is provided with a gear assembly and a motor base. The stepper motor is arranged on the motor base. The motor shaft of the stepper motor is connected with the first gear of the gear assembly. One side of the first gear of the gear assembly is meshed with one side of the second gear. The other side of the second gear extends into the shell and meshes with the outer gear ring on one side of the adjustment gear. The hook claw assembly is respectively provided in the notches of the openings on both sides of the bottom of the shell base. The screw assembly extends from the top of the shell cover and meshes with the internal thread at the inner diameter of the adjustment gear. At the same time, the screw assembly extends out of the bottom of the shell base. The above is a specific structural embodiment of the shell. In order to facilitate the installation of the stepper motor, the gear assembly, the hook claw assembly, the screw assembly and the adjustment gear, other structural forms can also be adopted.

[0012] The screw assembly of the brewing head assembly is symmetrically provided with two liquid outlet holes, which are respectively an American coffee liquid outlet hole and an Italian coffee liquid outlet hole. The liquid outlet pipes at the liquid outlet holes extend out of the pipe rack on the top of the shell of the brewing head assembly.

[0013] The invention has reasonable structural design, various structural forms, convenient production and assembly, small size, low cost, and especially good stability when the brewing barrel is hooked in the powder pressing state; it is suitable for use as a hook-claw coffee machine brewer and a further improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the explosion structure of the main structural parts of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the shell seat after enlargement.

[0016] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure in the initial state after assembly.

[0017] Figure 4 yes Figure 3 A schematic cross-sectional structure diagram of the present invention, in which part A is framed.

[0018] Figure 5 yes Figure 4 Enlarged view of part A.

[0019] Figure 6 yes Figure 3 The figure shows a schematic diagram of the internal structure, in which the shell of the brewing head assembly and the outer shell on one side of the brewing seat assembly are omitted, and the dotted line is a schematic diagram of the screw assembly structure.

[0020] Figure 7 yes Figure 6The enlarged internal structure diagram of the screw assembly is shown in FIG. 1 , wherein the dotted line is the screw sleeve of the screw assembly.

[0021] Figure 8 yes Figure 3 Schematic diagram of the three-dimensional structure on the other side.

[0022] Fig. 9 yes Figure 8 Schematic diagram of the top structure of the brew head assembly.

[0023] Fig.10 yes Figure 4 Schematic diagram of the cross-sectional structure of the powder receiving and powder pressing state, in which the dotted line is the state of the screw assembly and the hook assembly before powder pressing, and part B is framed in the figure.

[0024] Fig.11 yes Fig.10 An enlarged view of part B, in which the dotted line represents the detached state of the hook head of the hook claw assembly.

[0025] Fig.12 yes Fig.11 Schematic diagram of the structure of the bottom hook being out of contact.

[0026] Serial number and name of the accompanying drawings: 1. Brewing barrel, 101. Outer groove, 102. Limit column, 2. Hook claw assembly, 201. Hook, 202. Torsion spring, 203. Roller, 3. Shell seat, 301. Positioning column, 4. First bearing, 5. Adjusting gear, 6. Second bearing, 7. Shell cover, 8. Micro switch assembly, 801. First micro switch, 9. Screw assembly, 901. O-ring, 902. Screw head, 903. Screw sleeve, 9031. Guide groove, 9032. Deep groove, 904. Spring, 905. Center screw, 906. Second micro switch, 10. Pipe rack, 11. Motor seat, 12. Stepper motor, 13. Gear assembly, 14. Brewing seat assembly, 15. Push rod, 16. Powder scraper. Implementation

[0027] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 12As shown, the brewer includes a brewing head assembly and a brewing seat assembly 14, a liquid outlet is provided in the screw assembly 9 of the brewing head assembly, an O-ring 901 is provided on the outer diameter of the powder pressing part at one end of the screw assembly, an adjusting gear 5 is provided on the outer diameter of the threaded section of the screw assembly, and the adjusting gear is fixedly arranged in the housing, the outer diameter of the threaded section of the screw assembly in the center hole of the housing is meshed with the internal thread at the inner diameter of the adjusting gear, the outer gear ring on one side of the adjusting gear is meshed with one side of the gear assembly 13 extending into the housing, the driving gear of the gear assembly is connected to the motor shaft of the stepping motor 12 on one side of the housing, and two symmetrical gears are provided on the lower side of the housing. There is a hook assembly 2, and the brewing barrel 1 is arranged in the brewing seat assembly; when the brewing barrel in the brewing seat assembly rotates to one side and is aligned with the screw assembly of the brewing head assembly, the brewing barrel in the brewing seat assembly is lifted by the swing rod in the brewing assembly, and the barrel mouth of the brewing barrel is abutted or aligned with the bottom end face of the shell of the brewing head assembly. At the same time, one end of the hook 201 of the hook assembly is engaged with the outer flange at the barrel mouth of the brewing barrel, and the stepping motor drives the screw assembly to move up and down to the brewing barrel through the gear assembly and the adjusting gear to realize powder pressing. The pin shaft in the middle of the hook of the hook assembly is respectively provided with a torsion spring 202. The threaded section of the screw assembly is symmetrically provided with guide grooves 9031 on both sides, one end of the brewing seat assembly of the guide groove is a deep groove 9032, and the guide groove at the threaded section of the screw assembly is a shallow groove. The other end of the hook of the hook assembly is bent inwardly of the hook head and is provided with a turning head, and a roller 203 is provided at the turning head. The roller is longitudinally positioned in the guide groove 9031 of the screw assembly and rolls when moving up and down; the hook head of the hook claw assembly is kept open at one end of the hook head by the torsion spring. At the same time, the bend at the other end of the hook head abuts against the outer diameter of the screw assembly, and the positioning columns 301 on both sides of the center hole in the shell are inserted into the guide grooves on both sides of the threaded section of the screw assembly for positioning and moving up and down; when the bend is embedded in the deep grooves of the guide grooves on both sides of the screw assembly, the hook head of the hook is separated from the outer flange of the barrel mouth of the brewing barrel; when the screw assembly is screwed into the brewing barrel through the action of the stepper motor, the bend is located in the shallow grooves of the guide grooves on both sides of the screw assembly, and the hook head of the hook is buckled with the outer flange of the barrel mouth of the brewing barrel.

[0028] Specifically: the above-mentioned screw assembly includes a screw head 902, a screw sleeve 903 and a spring 904, the threaded section is arranged on the outer diameter of the screw sleeve of the screw assembly, the outer diameter of one end of the screw head extending out of the screw sleeve is provided with the O-ring, the end face of the screw head is provided with a filter element net, the other end of the screw head in the screw sleeve and the sealing sleeve between the lower inner cavity of the screw sleeve are combined with the spring, one end of the central screw 905 in the upper inner cavity of the screw sleeve is connected to the central column of the screw head in the lower inner cavity, and a second micro switch 906 is provided on one side of the other end of the central screw in the upper inner cavity of the screw sleeve; when the screw head presses the coffee powder in the brewing barrel, the spring is deformed, the screw head is partially retracted into the screw sleeve, and the central screw triggers the second micro switch. The outer flange of the barrel mouth of the brewing barrel is square, and outer grooves 101 in the form of upward oblique lifting grooves are symmetrically provided on both sides of the bottom of the outer flange of the barrel mouth of the brewing barrel. Limiting columns 102 are symmetrically provided on both sides of the brewing barrel below the outer groove. The shape of the outer groove corresponds to the shape of the hook head of the hook claw assembly, and when the shape is matched, the limiting column for lifting the brewing barrel of the brewing seat assembly is pressed against the top shell opening of the outer shell of the brewing seat assembly, and the end of the hook head of the hook claw assembly is provided with a corresponding arc edge.

[0029] When the stepper motor drives the screw assembly to move into the brewing barrel through the gear assembly and the adjusting gear to achieve powder compression, the push rod 15 at the bottom of the brewing barrel is driven by the transmission motor on one side of the brewing seat assembly to move toward the side of the screw assembly. The first bearing 4 and the second bearing 6 are respectively provided at the openings at both ends of the outer diameter adjusting gear of the screw assembly in the shell, and the inner diameters of the inner rings of the first bearing and the second bearing are respectively fitted with the convex rings at the openings at both ends of the adjusting gear. At least one micro switch assembly 8 is provided at the shell on the outer diameter side of the screw assembly. When the screw assembly moves to compress powder and / or open the hook assembly, the screw assembly triggers the first micro switch 801 of the micro switch assembly, and the end of the threaded section of the screw assembly at the movable spring of the first micro switch is correspondingly provided with a notch; when the screw assembly is pressed down into the brewing barrel, the movable spring of the first micro switch is located in the notch at the end of the threaded section of the screw assembly, and the first micro switch is disconnected. The shell body includes a shell base 3 and a shell cover 7. The top of the shell base and the bottom of the shell cover are connected as a whole through screws and nuts at the end angles. At the same time, one side of the adjusting gear in the connection is aligned with the openings at the shell base and the shell cover. The outer diameter of the shell base on one side of the opening is provided with a gear assembly 13 and a motor base 11. The stepper motor is arranged on the motor base. The motor shaft of the stepper motor is connected to the first gear of the gear assembly. One side of the first gear of the gear assembly is meshed with one side of the second gear. The other side of the second gear extends into the shell body and meshes with the outer gear ring on one side of the adjusting gear. The hook claw assemblies are respectively provided in the notches of the openings on both sides of the bottom of the shell base. The screw assembly extends from the top of the shell cover and meshes with the internal thread at the inner diameter of the adjusting gear. At the same time, the screw assembly extends out of the bottom of the shell base.

[0030] The screw assembly of the above-mentioned brewing head assembly is symmetrically provided with one or two liquid outlet holes, and the two liquid outlet holes are respectively an American coffee liquid outlet hole and an Italian coffee liquid outlet hole. The liquid outlet pipes at one or two liquid outlet holes extend out of the top pipe rack 10 of the shell of the brewing head assembly respectively. In the figure, one liquid outlet hole and the corresponding pipe rack are used as an embodiment.

[0031] The specific operations of the powder receiving state, powder pressing brewing state and slag discharge state of the brewer are as follows: in the powder receiving state, the swing motor drives the brewing barrel of the brewing seat assembly back to the origin after being powered on, and the barrel mouth of the brewing barrel is vertically aligned with the powder receiving port in the coffee machine; at the same time, the transmission motor drives the push rod of the brewing seat assembly back to the origin after being powered on, so that an open cavity is generated in the brewing barrel, waiting for powder receiving, and then the powder receiving action is completed. In the powder pressing brewing state, the swing motor drives the brewing barrel of the brewing seat assembly to the side of the brewing head assembly under power on, and the barrel mouth of the brewing barrel is vertically aligned with the screw assembly and lifts the brewing barrel. The stepper motor drives the screw assembly to move downward so that the screw assembly is inserted into the brewing barrel. At the same time, the screw assembly drives the hook of the hook claw assembly to swing, and the hook head of the hook is buckled with the outer flange of the barrel mouth of the brewing barrel. At this time, the push rod in the brewing barrel of the brewing seat assembly moves upward, and the coffee powder in the brewing barrel is made into a powder cake; then, wait for the hot water from the boiler of the coffee machine to extract and brew coffee. In the slag discharge state, when the stepper motor drives the screw assembly to move upward and reset, the hook of the hook claw assembly swings to reset and disengages from the outer flange of the barrel mouth of the brewing barrel, and the swing motor drives the brewing barrel of the brewing seat assembly. After power is turned on, the transmission motor drives the push rod in the brewing barrel of the brewing seat assembly to push the coffee grounds cake out of the brewing barrel, and the coffee grounds cake falls out from the slag pouring plate, completing the slag discharge action.

[0032] The above contents are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art may make obvious improvements or substitutions to the present invention in combination with existing common knowledge, which also fall within the protection scope of the claims of the present invention.

Claims

1. A hook-claw coffee machine brewer, the brewer comprising a brewing head assembly and a brewing seat assembly (14), a liquid outlet hole being provided in a screw assembly (9) of the brewing head assembly, an O-ring (901) being provided at the outer diameter of a powder pressing portion at one end of the screw assembly, an adjusting gear (5) being provided at the outer diameter of a threaded section of the screw assembly, the adjusting gear being fixedly arranged in a housing, the outer diameter of the threaded section of the screw assembly in a central hole of the housing meshing with an inner thread at an inner diameter of the adjusting gear, an outer gear ring on one side of the adjusting gear meshing with a side of a gear assembly (13) extending into the housing, a driving gear of the gear assembly being connected to a motor shaft of a stepping motor (12) on one side of the housing, and a lower portion of the housing Hook assemblies (2) are symmetrically arranged on both sides, and the brewing barrel (1) is arranged in the brewing seat assembly; when the brewing barrel in the brewing seat assembly rotates to one side and is aligned with the screw assembly of the brewing head assembly, the brewing barrel in the brewing seat assembly is lifted by the swing rod in the brewing assembly, and the barrel mouth of the brewing barrel is abutted against or aligned with the bottom end surface of the shell of the brewing head assembly. When one end of the hook (201) of the hook assembly is engaged with the outer flange at the barrel mouth of the brewing barrel, the stepping motor drives the screw assembly to move up and down to position in the brewing barrel through the gear assembly and the adjusting gear to realize powder pressing, and the middle pin shaft of the hook of the hook assembly is respectively provided with a torsion spring (202); it is characterized in that Guide grooves (9031) are symmetrically provided on both sides of the threaded section of the screw assembly (9); one end of the brewing seat assembly (14) of the guide groove is a deep groove (9032); the guide groove at the threaded section of the screw assembly is a shallow groove; the other end of the hook (201) of the hook claw assembly (2) is bent inwardly of the hook head and is provided with a turning head; the hook head of the hook claw assembly is respectively kept open outward at one end of the hook head by the action of a torsion spring (202); the turning head at the other end of the hook head abuts against the outer diameter of the screw assembly; at the same time, the positioning columns (301) on both sides of the central hole in the shell are inserted into the guide grooves on both sides of the threaded section of the screw assembly for positioning and moving up and down; when the turning head is embedded in the deep grooves of the guide grooves on both sides of the screw assembly, the hook head of the hook is separated from the outer flange of the barrel mouth of the brewing barrel (1); when the screw assembly is screwed into the brewing barrel by the action of the stepping motor (12), the turning head is located in the shallow grooves of the guide grooves on both sides of the screw assembly, and the hook head of the hook is buckled with the outer flange of the barrel mouth of the brewing barrel.

2. The hook-claw coffee machine brewer according to claim 1, characterized in that The screw assembly (9) comprises a screw head (902), a screw sleeve (903) and a spring (904); the threaded section is arranged at the outer diameter of the screw sleeve of the screw assembly; the outer diameter of one end of the screw head extending out of the screw sleeve is provided with the O-ring (901); the end surface of the screw head is provided with a filter element net; the spring is provided in a sealing sleeve between the other end of the screw head in the screw sleeve and the lower inner cavity of the screw sleeve; one end of the central screw (905) in the upper inner cavity of the screw sleeve is connected to the central column of the screw head in the lower inner cavity; and a second micro switch (906) is provided on one side of the other end of the central screw in the upper inner cavity of the screw sleeve; when the screw head presses the coffee powder in the brewing barrel (1), the spring is deformed, the screw head is partially retracted into the screw sleeve, and the central screw triggers the second micro switch.

3. The hook-claw coffee machine brewer according to claim 1, characterized in that The outer flange of the barrel mouth of the brewing barrel (1) is square, and outer grooves (101) in the form of upward oblique lifting grooves are symmetrically provided on both sides of the bottom of the outer flange of the barrel mouth of the brewing barrel. Limiting columns (102) are symmetrically provided on both sides of the brewing barrel below the outer groove. The shape of the outer groove corresponds to the shape of the hook head of the hook claw assembly (2). When the limiting column for lifting the brewing barrel of the brewing seat assembly is abutted against the top shell opening of the outer shell of the brewing seat assembly, the end of the hook head of the hook claw assembly is provided with a corresponding arc edge.

4. The hook-claw coffee machine brewer according to claim 1, characterized in that A roller (203) is provided at the turning end of the hook assembly (2), and the roller is longitudinally positioned in the guide groove (9031) of the screw assembly (9) and rolls when moving up and down.

5. The hook-claw coffee machine brewer according to claim 1, characterized in that When the stepping motor (12) drives the screw assembly (9) to move into the brewing barrel (1) via the gear assembly (13) and the adjusting gear (5) to achieve powder compression, the push rod (15) at the bottom of the brewing barrel is driven by the transmission motor on one side of the brewing seat assembly (14) to move toward the side of the screw assembly.

6. The hook-claw coffee machine brewer according to claim 1, characterized in that A first bearing (4) and a second bearing (6) are respectively provided at the openings at both ends of the outer diameter adjustment gear (5) of the screw assembly (9) in the housing, and the inner diameters of the inner rings of the first bearing and the second bearing are respectively fitted with the convex rings at the openings at both ends of the adjustment gear.

7. The hook-claw coffee machine brewer according to claim 1, characterized in that At least one micro switch assembly (8) is provided at the housing on one side of the outer diameter of the screw assembly (9); when the screw assembly moves to press powder and / or open the hook assembly (2), the screw assembly triggers the first micro switch (801) of the micro switch assembly; a notch is provided at the end of the threaded section of the screw assembly at the movable spring of the first micro switch.

8. The hook-claw coffee machine brewer according to claim 1, characterized in that The shell comprises a shell base (3) and a shell cover (7). The top of the shell base and the bottom of the shell cover are connected as a whole through a screw and a nut at the end angle. At the same time, one side of the adjusting gear (5) in the connection is aligned with the openings at the shell base and the shell cover. The outer diameter of the shell base on one side of the opening is provided with a gear assembly (13) and a motor base (11). The stepper motor (12) is arranged on the motor base. The motor shaft of the stepper motor is connected with the first gear of the gear assembly. One side of the first gear of the gear assembly meshes with one side of the second gear. The other side of the second gear extends into the shell and meshes with the outer gear ring on one side of the adjusting gear. The hook claw assemblies (2) are respectively provided in the notches of the openings on both sides of the bottom of the shell base. The screw assembly (9) extends from the top of the shell cover and meshes with the internal thread at the inner diameter of the adjusting gear. At the same time, the screw assembly extends out of the bottom of the shell base.

9. The hook-claw coffee machine brewer according to claim 1, characterized in that Two liquid outlet holes are symmetrically arranged in the screw assembly (9) of the brewing head assembly, the two liquid outlet holes are respectively an American coffee liquid outlet hole and an Italian coffee liquid outlet hole, and the liquid outlet pipes at the liquid outlet holes extend out of the pipe frame (10) at the top of the housing of the brewing head assembly.

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