Hook claw type coffee machine brewing device

Abstract

The utility model relates to a hook claw type coffee machine brewing device which aims at solving the problems of poor stability, long stroke, high cost and large size which are 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 utility model relates to a brewer of a coffee machine, in particular to a claw-type coffee machine brewer. Background Art

[0002] A coffee machine is a household or commercial electrical appliance that automatically makes coffee throughout the process of grinding, tamping, loading, brewing, and removing residues. The core component of some existing fully automatic coffee machines is the brewer, which is used for powder receiving, tamping, brewing, and residue discharging. It generally consists of a brewing barrel assembly and a brewing head assembly. The tamping and brewing mechanism is arranged in the brewing head assembly. When the brewing barrel assembly is on one side, powder receiving is achieved. When the barrel of the brewing barrel assembly rotates to the side of the brewing sleeve assembly, tamping, brewing, and residue discharging are achieved. After that, the barrel of the brewing barrel assembly returns to the powder receiving side to wait for the next powder receiving. Some existing such coffee machine brewers use a large gear and a screw to rotate and drive up and down movement, such as the application number 202410298852.7 disclosed in the Chinese patent literature, the application publication date is May 7, 2024, and the invention name is "Large-dose coffee machine automatic extraction and brewing brewer"; some other such coffee machine brewers use a claw-type structure design, such as the application number 202410707362.8 disclosed in the Chinese patent literature, the application publication date is August 2, 2024, and the invention name is "Coffee machine brewer tamping and brewing device"; when the structure in the shell where the screw and the push head are integrated moves up and down, the locking hook is buckled or disengaged at the mouth of the brewing barrel, and the push head of the screw is sealed with the mouth of the brewing barrel. The powder tamping in the brewing barrel is mainly achieved through the push rod in the brewing barrel; however, its locking hook remains in the buckled position, which is prone to jamming and other situations. At the same time, its production and assembly are inconvenient, the production cost is relatively high, and the volume occupied is relatively large. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the present utility model is to provide a claw-type coffee machine brewer to the art, so as to solve the technical problems that the structural design of existing similar products is not good enough, resulting in inconvenient production and assembly, relatively high production cost, and relatively large occupied volume. In particular, the connection of the screw component and the top structure design of the gear assembly in similar products are prone to poor stability, long stroke, high cost, and large volume. Its purpose is achieved through the following technical solutions.

[0004] A claw-type coffee machine brewer, which includes a brewing head assembly and a brewing base assembly. An outlet hole is provided in the screw assembly of the brewing head assembly. An O-ring is provided on the outer diameter of the powder pressing part at one end of the screw assembly. An adjusting gear is provided on the outer diameter of the threaded section of the screw assembly. The adjusting gear is fixedly arranged in the housing. The outer diameter of the threaded section of the screw assembly in the central hole of the housing meshes with the internal thread at the inner diameter of the adjusting gear. The external gear ring on one side of the adjusting gear meshes with one side of the gear assembly extending into the housing. The driving gear of the gear assembly is connected to the motor shaft of the stepping motor on one side of the housing. Claw assemblies are symmetrically provided on both sides below the housing. The brewing bucket is arranged in the brewing base assembly; when the brewing bucket in the brewing base assembly rotates to one side and aligns with the screw assembly of the brewing head assembly, the brewing bucket in the brewing base assembly is lifted by the swing rod in the brewing assembly. The mouth of the brewing bucket abuts or aligns with the bottom end face of the housing of the brewing head assembly. While one end of the hook of the claw assembly is buckled with the outer turned edge at the mouth of the brewing bucket, the stepping motor drives the screw assembly to move up and down in position into the brewing bucket through the gear assembly and the adjusting gear to achieve powder pressing. Torsion springs are respectively provided on the pins in the middle of the hooks of the claw assembly. The key point of its structural design is that guide grooves are symmetrically provided on both sides of the threaded section of the screw assembly. One end of the guide groove at the brewing base assembly is a deep groove, and the guide groove at the threaded section of the screw assembly is a shallow groove. The other ends of the hooks of the claw assembly are bent inward towards the hook heads and are respectively provided with elbows. The hook heads of the claw assembly are respectively kept open outward by the action of torsion springs. When the elbows at the other ends of the hook heads abut against the outer diameter of the screw assembly, the positioning posts on both sides of the central hole in the housing are inserted into the guide grooves on both sides of the threaded section of the screw assembly to move up and down in position; when the elbows are embedded in the deep grooves of the guide grooves on both sides of the screw assembly, the hook heads of the hooks are separated from the outer turned edge at the mouth of the brewing bucket; when the screw assembly is screwed into the brewing bucket under the action of the stepping motor, the elbows are located in the shallow grooves of the guide grooves on both sides of the screw assembly, and the hook heads of the hooks are buckled with the outer turned edge at the mouth of the brewing bucket. Thus, according to the above structure, after the powder pressing and brewing in the brewing bucket are completed, the screw assembly returns to the initial position, the elbows at the hooks of the claw assembly return to the deep groove positions of the guide grooves at the screw assembly, the hook heads at the hooks of the claw assembly return to the open state, the hooks are separated from the outer turned edge at the mouth of the brewing bucket, and the brewing bucket returns to the initial powder receiving position through the swing motor on one side of the brewing base assembly. A slag guiding plate is provided on one side of the brewing bucket at the mouth of the brewing bucket as needed on one side of the above brewing base assembly, and a powder scraping plate is provided on one side of the brewing head assembly of the brewing base assembly above the mouth of the brewing bucket at the powder receiving position. The brewing head assembly and the brewing base assembly are connected as a whole through an outer diameter connecting plate. At the same time, the screw head and the screw sleeve of the above screw assembly are integrally formed, or are internally provided with the following springs in a split manner 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 disposed on the outer diameter of the screw sleeve of the screw assembly. An O-ring is provided on the outer diameter of one end of the screw head extending out of the screw sleeve. A filter screen is provided on the end face of this end of the screw head. The other end of the screw head within the screw sleeve is sealingly sleeved with the lower inner cavity of the screw sleeve, and the spring is provided therebetween. While one end of the central screw in the upper inner cavity of the screw sleeve is connected to the central column of the screw head in the lower inner cavity, a second microswitch 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 deforms, part of the screw head retracts into the screw sleeve, and the central screw triggers the second microswitch.

[0006] The outer flanging of the barrel mouth of the brewing barrel is square. On both sides of the bottom of the outer flanging of the barrel mouth of the brewing barrel, upwardly inclined lifting buckle grooves are symmetrically provided as outer grooves. On both sides of the brewing barrel below the outer grooves, limiting columns are symmetrically provided. When the shape of the outer groove corresponds to the shape of the hook head of the claw assembly and is snap-fitted, the limiting columns for lifting the brewing barrel of the brewing seat assembly abut against the top shell opening of the outer shell of the brewing seat assembly for limiting. The end of the hook head of the claw assembly is provided with a corresponding arc-shaped edge. Due to the above structure, the contact surface and groove shape of the hook head of the claw assembly at the outer flanging of the brewing barrel are increased, and the stability when the two are snap-fitted is better.

[0007] A roller is provided at the elbow of the claw assembly. The roller is longitudinally arranged to roll when moving up and down within the guide groove of the screw assembly. Thus, while further limiting through the roller, the transition between the deep groove and the shallow groove in the guide groove is stabilized.

[0008] When the stepping motor drives the screw assembly to move into the brewing barrel to achieve powder pressing through the gear assembly and the adjusting gear, the push rod at the bottom of the brewing barrel moves toward the screw assembly side through the driving of the transmission motor on one side of the brewing seat assembly. The above structure is a structural design for the push rod to cooperate with the screw assembly to further move upward for powder pressing, and the powder pressing effect is better. It can also achieve powder pressing only through the screw assembly.

[0009] At both ends of the adjusting gear on the outer diameter of the screw assembly in the shell, a first bearing and a second bearing are respectively provided. The inner diameters of the inner rings of the first bearing and the second bearing are respectively sleeved with the convex rings at both ends of the adjusting gear. The above structure improves the stability of the rotation of the adjusting gear within the shell.

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

[0011] The housing includes a housing base and a housing cover. While the top of the housing base and the bottom of the housing cover are integrated by screws and nuts at the end corners, on one side of the adjusting gear inside the connection part, it is aligned with the openings at the housing base and the housing cover. On the outer diameter of the housing base on one side of the opening, there are a gear assembly and a motor base. A stepper motor is arranged on the motor base, and 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 meshes with one side of the second gear, and the other side of the second gear extends into the housing and meshes with the external gear ring on one side of the adjusting gear. The claw assemblies are respectively arranged at the notches of the openings on both sides of the bottom of the housing base. While the screw assembly extends from the top of the housing cover and meshes with the internal thread at the inner diameter of the adjusting gear, the screw assembly extends out of the bottom of the housing base. The above is a specific structural embodiment of the housing. For the convenience of installing the stepper motor, the gear assembly, the claw assembly, the screw assembly and the adjusting gear, other structural forms can also be adopted.

[0012] Symmetrically arranged in the screw assembly of the brewing head assembly are two liquid outlet holes, namely the American coffee liquid outlet hole and the Italian coffee liquid outlet hole respectively. The liquid outlet pipes at the liquid outlet holes respectively extend out of the pipeline rack at the top of the housing of the brewing head assembly.

[0013] The structure of the present utility model is reasonably designed, with diverse structural forms, convenient production and assembly, small volume and low cost. Especially, it has good stability when the brewing barrel is hooked in the powder pressing state. It is suitable for use as a brewing device of a claw type coffee machine and for further improvement of similar products. Brief Description of the Drawings

[0014] Figure 1 is an exploded structural schematic diagram of the main structural part of the present utility model.

[0015] Figure 2 is Figure 1 a top view structural schematic diagram of the enlarged interior of the housing base.

[0016] Figure 3 is Figure 1 a three-dimensional structural schematic diagram of the initial state after assembly.

[0017] Figure 4 is Figure 3 a sectional structural schematic diagram, and part A in the figure is framed.

[0018] Figure 5 is Figure 4 an enlarged view of part A.

[0019] Figure 6 is Figure 3 an internal structural schematic diagram, in which the housing of the brewing head assembly and the outer shell on one side of the brewing base assembly are omitted, and the dotted line is the structural schematic diagram of the screw assembly.

[0020] Figure 7 is Figure 6Schematic diagram of the enlarged internal structure of the screw assembly, where the dashed line in the figure is the screw sleeve of the screw assembly.

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

[0022] Figure 9 is Figure 8 Schematic diagram of the top structure of the brewing head assembly of

[0023] Figure 10 is Figure 4 Schematic sectional view of the powder receiving and powder pressing states of , where the dashed line in the figure is the state before powder pressing of the screw assembly and the claw assembly, and part B in the figure is framed.

[0024] Figure 11 is Figure 10 Enlarged view of part B of , where the dashed line in the figure is the disengaged state of the hook head of the claw assembly.

[0025] Figure 12 is Figure 11 Schematic diagram of the structure of the disengaged state of the bottom hook head of

[0026] Reference numerals and names of the drawings: 1. Brewing barrel, 101. Outer groove, 102. Limit post, 2. Claw assembly, 201. Hook, 202. Torsion spring, 203. Roller, 3. Housing base, 301. Positioning post, 4. First bearing, 5. Adjusting gear, 6. Second bearing, 7. Housing cover, 8. Microswitch assembly, 801. First microswitch, 9. Screw assembly, 901. O-ring, 902. Screw head, 903. Screw sleeve, 9031. Guide groove, 9032. Deep groove, 904. Spring, 905. Central screw, 906. Second microswitch, 10. Pipeline rack, 11. Motor base, 12. Stepper motor, 13. Gear assembly, 14. Brewing seat assembly, 15. Push rod, 16. Scraper. Embodiment

[0027] Now, in combination with the drawings, the structure and use of the present invention will be further described. As Figures 1 - 12As shown in the figure, the brewer includes a brewing head assembly and a brewing base assembly 14. There is a liquid outlet hole 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. The adjusting gear is fixedly arranged in the shell. The outer diameter of the threaded section of the screw assembly in the central hole of the shell meshes with the internal thread at the inner diameter of the adjusting gear. The external gear ring on one side of the adjusting gear meshes with one side of the gear assembly 13 extending into the shell. The driving gear of the gear assembly is connected to the motor shaft of the stepping motor 12 on one side of the shell. Hook assemblies 2 are symmetrically provided on both sides below the shell. The brewing barrel 1 is arranged in the brewing base assembly; when the brewing barrel in the brewing base assembly rotates to one side and aligns with the screw assembly of the brewing head assembly, the brewing barrel in the brewing base assembly is lifted by the swing rod in the brewing assembly. The barrel mouth of the brewing barrel abuts or aligns with the bottom end face of the shell of the brewing head assembly. While one end of the hook 201 of the hook assembly is buckled with the outward turned edge at the barrel mouth of the brewing barrel, the stepping motor drives the screw assembly to move up and down in a positioning manner into the brewing barrel through the gear assembly and the adjusting gear to achieve powder pressing. Torsion springs 202 are respectively provided on the pin shafts in the middle of the hooks of the hook assembly. Guide grooves 9031 are symmetrically provided on both sides of the threaded section of the above screw assembly. One end of the guide groove at the brewing base assembly is a deep groove 9032, and the guide groove at the threaded section of the screw assembly is a shallow groove. The other ends of the hooks of the hook assembly are bent inward towards the hook heads and are respectively provided with bent heads. Roller wheels 203 are respectively provided at the bent heads. When the roller wheels move up and down in a positioning manner longitudinally in the guide groove 9031 of the screw assembly, they are arranged to roll; the hook heads of the hook assembly are respectively kept open outward by the action of the torsion springs. When the bent heads at the other ends of the hook heads abut against the outer diameter of the screw assembly, 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 to move up and down in a positioning manner; when the bent heads are embedded in the deep grooves of the guide grooves on both sides of the screw assembly, the hook heads of the hooks are separated from the outward turned edge of the barrel mouth of the brewing barrel; when the screw assembly is screwed into the brewing barrel under the action of the stepping motor, the bent heads are located in the shallow grooves of the guide grooves on both sides of the screw assembly, and the hook heads of the hooks are buckled with the outward turned edge 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, and the end face of this end of the screw head is provided with a filter screen. The other end of the screw head in the screw sleeve is hermetically sleeved with the lower inner cavity of the screw sleeve and is provided with the spring. While 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, a second microswitch 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 deforms, part of the screw head retracts into the screw sleeve, and the central screw triggers the second microswitch. The outer flanging of the barrel mouth of the brewing barrel is square, and upwardly inclined lifting buckle grooves 101 are symmetrically provided on both sides of the bottom of the outer flanging of the barrel mouth of the brewing barrel. Limiting posts 102 are symmetrically provided on both sides of the brewing barrel below the outer groove. When the shape of the outer groove corresponds to the shape of the hook head of the claw assembly and is buckled, the limiting posts for lifting the brewing barrel of the brewing seat assembly abut against the top shell opening of the housing of the brewing seat assembly for limiting, and the end of the hook head of the claw assembly is provided with a corresponding arc edge.

[0029] When the above-mentioned stepper motor drives the screw assembly to move into the brewing barrel through the gear assembly and the adjusting gear to achieve powder pressing, the push rod 15 at the bottom of the brewing barrel moves towards the screw assembly side through the driving of the transmission motor on one side of the brewing seat assembly. First bearings 4 and second bearings 6 are respectively provided at the two end holes of the adjusting gear on the outer diameter of the screw assembly in the housing. The inner diameters of the inner rings of the first bearing and the second bearing are respectively sleeved with the convex rings at the two end holes of the adjusting gear. At least one microswitch assembly 8 is provided at the housing at one side of the outer diameter of the screw assembly. When the screw assembly moves to press the powder and / or open the claw assembly, the screw assembly triggers the first microswitch 801 of the microswitch assembly. A notch is correspondingly provided at the end of the threaded section of the screw assembly at the moving piece of the first microswitch. When the screw assembly presses down into the brewing barrel, the moving piece of the first microswitch is located in the notch at the end of the threaded section of the screw assembly, and the first microswitch is turned off. The housing includes a housing base 3 and a housing cover 7. While the top of the housing base is integrally connected to the bottom of the housing cover by screws and nuts at the end corners, the adjusting gear on one side inside the connection is aligned with the openings at the housing base and the housing cover. A gear assembly 13 and a motor base 11 are provided on the outer diameter of the housing base on one side of the opening. 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 housing and is meshed with the outer tooth ring on one side of the adjusting gear. The claw assemblies are respectively provided in the slots at the two sides of the bottom of the housing base. While the screw assembly extends into the housing from the top of the housing cover and is meshed with the internal thread at the inner diameter of the adjusting gear, the screw assembly extends out of the bottom of the housing base.

[0030] One or two liquid outlet holes are symmetrically arranged inside the screw assembly of the above-mentioned brewing head assembly. 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 respectively extend out of the top of the housing of the brewing head assembly to the pipeline rack 10. In the figure, an embodiment with one liquid outlet hole and the corresponding pipeline rack is shown.

[0031] The specific operations of the powder receiving state, powder tamping and brewing state, and slag discharging state of this brewer are as follows: In the powder receiving state, after being powered on, the swing motor drives the brewing bucket of the brewing seat assembly back to the origin, and the bucket mouth of the brewing bucket is vertically upward and aligned with the powder receiving port inside the coffee machine; at the same time, after being powered on, the transmission motor drives the push rod of the brewing seat assembly back to the origin, creating an open cavity in the brewing bucket to wait for powder receiving, and then completing the powder receiving action. In the powder tamping and brewing state, the swing motor drives the brewing bucket of the brewing seat assembly to one side of the brewing head assembly after being powered on. The bucket mouth of the brewing bucket is vertically upward and aligned with the screw assembly, and the brewing bucket is lifted. While the screw assembly is driven by the stepper motor to move downward so that the screw assembly is sleeved into the brewing bucket, the screw assembly drives the hook of the hook assembly to swing, and the hook head of the hook is buckled with the outward-turned edge of the bucket mouth of the brewing bucket. At this time, the push rod inside the brewing bucket of the brewing seat assembly moves upward, and the coffee powder in the brewing bucket is made into a powder cake; then, wait for hot water from the boiler of the coffee machine for coffee extraction and brewing. In the slag discharging state, when the stepper motor drives the screw assembly to move upward and reset, the hook of the hook assembly swings and resets and disengages from the outward-turned edge of the bucket mouth of the brewing bucket. The swing motor drives the brewing bucket of the brewing seat assembly, and the transmission motor drives the push rod inside the brewing bucket of the brewing seat assembly after being powered on to push the coffee slag cake out of the brewing bucket, and the coffee slag cake falls out from the slag discharging plate to complete the slag discharging action.

[0032] The above content is intended to illustrate the technical means of the present invention and does not limit the technical scope of the present invention. Obvious improvements or replacements made by those skilled in the art to the present invention in combination with the existing well-known common sense also fall within the protection scope of the claims of the present invention.

Claims

1. A claw-type coffee machine brewer, the brewer comprising a brewing head assembly and a brewing base assembly (14). An outlet hole is provided in a screw assembly (9) of the brewing head assembly. An O-ring (901) is provided on the outer diameter of the powder pressing portion 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. The adjusting gear is fixedly arranged in a housing. The outer diameter of the threaded section of the screw assembly in the central hole of the housing meshes with the internal thread at the inner diameter of the adjusting gear. The external gear ring on one side of the adjusting gear meshes with one side of a gear assembly (13) extending into the housing. The driving gear of the gear assembly is connected to the motor shaft of a stepping motor (12) on one side of the housing. Claw assemblies (2) are symmetrically provided on both sides below the housing. A brewing barrel (1) is arranged in the brewing base assembly; when the brewing barrel in the brewing base assembly rotates to one side and aligns with the screw assembly of the brewing head assembly, the brewing barrel in the brewing base assembly is lifted by a swing rod in the brewing assembly. The barrel mouth of the brewing barrel abuts or aligns with the bottom end face of the housing of the brewing head assembly. While one end of a hook (201) of the claw assembly is buckled with the outward turned edge at the barrel mouth of the brewing barrel, the stepping motor drives the screw assembly to move up and down in a positioning manner into the brewing barrel through the gear assembly and the adjusting gear to achieve powder pressing. A torsion spring (202) is respectively provided on a pin shaft in the middle of the hook of the claw assembly; characterized in that On both sides of the threaded section of the screw component (9), guide grooves (9031) are symmetrically provided. One end of the brewing seat component (14) of the guide groove is a deep groove (9032), and the guide groove at the threaded section of the screw component is a shallow groove. The other ends of the hooks (201) of the claw component (2) are bent inward towards the hook head and are respectively provided with elbows. The hook heads of the claw component are respectively kept open outward at one end by the action of torsion springs (202). When the elbows at the other ends of the hook heads abut against the outer diameter of the screw component, the positioning posts (301) on both sides of the central hole in the housing are inserted into the guide grooves on both sides of the threaded section of the screw component to position the up-and-down movement; when the elbows are embedded in the deep grooves of the guide grooves on both sides of the screw component, the hook heads of the hooks are disengaged from the outward-turned edge of the barrel mouth of the brewing barrel (1); when the screw component is screwed into the brewing barrel by the action of the stepping motor (12), the elbows are located in the shallow grooves of the guide grooves on both sides of the screw component, and the hook heads of the hooks are buckled with the outward-turned edge of the barrel mouth of the brewing barrel.

2. The hook-type coffee machine brewer according to claim 1, characterized in that The screw component (9) 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 component. The outer diameter of one end of the screw head extending out of the screw sleeve is provided with the O-ring (901). A filter screen is provided on the end face of this end of the screw head. The other end of the screw head in the screw sleeve is hermetically sleeved with the lower inner cavity of the screw sleeve and is provided 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. At the same time, a second microswitch (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 deforms, the screw head partially retracts into the screw sleeve, and the central screw triggers the second microswitch.

3. The claw-type coffee machine brewer according to claim 1, characterized in that The outward-turned edge of the barrel mouth of the brewing barrel (1) is square. On both sides of the bottom of the outward-turned edge of the barrel mouth of the brewing barrel, outward grooves (101) in the shape of upwardly inclined lifting buckling grooves are symmetrically provided. On both sides of the brewing barrel below the outward grooves, limit posts (102) are symmetrically provided. When the shape of the outward grooves corresponds to the shape of the hook heads of the claw component (2) and is buckled, the limit posts for lifting the brewing barrel of the brewing seat component abut against the top shell opening of the housing of the brewing seat component for limiting, and the end parts of the hook heads of the claw component are provided with corresponding arc-shaped edges.

4. The claw-type coffee machine brewer according to claim 1, characterized in that A roller (203) is provided at the elbow of the claw component (2), and the roller is arranged to roll when positioning and moving up and down longitudinally in the guide groove (9031) of the screw component (9).

5. The claw-type coffee machine brewer according to claim 1, wherein When the stepping motor (12) drives the screw component (9) to move into the brewing barrel (1) through the gear component (13) and the adjusting gear (5) to realize powder pressing, the push rod (15) at the bottom of the brewing barrel moves towards the screw component side through the drive of the transmission motor on one side of the brewing seat component (14).

6. The claw - type coffee machine brewer according to claim 1, wherein On both ends of the adjusting gear (5) at the outer diameter of the screw component (9) in the housing, a first bearing (4) and a second bearing (6) are respectively provided, and the inner diameters of the inner rings of the first bearing and the second bearing are respectively sleeved with the convex rings at both ends of the adjusting gear.

7. The hook-type coffee machine brewer according to claim 1, wherein At least one microswitch 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 the powder and / or open the claw assembly (2), the screw assembly triggers the first microswitch (801) of the microswitch assembly, and a notch is correspondingly provided at the end of the threaded section of the screw assembly at the movable piece of the first microswitch.

8. The claw-type coffee machine brewer according to claim 1, wherein The housing includes a housing base (3) and a housing cover (7). The top of the housing base and the bottom of the housing cover are integrated by screws and nuts at the end corners. At the same time, one side of the adjusting gear (5) inside the connection is aligned with the openings at the housing base and the housing cover. A gear assembly (13) and a motor base (11) are provided on the outer diameter of the housing base on one side of the opening. A stepping motor (12) is arranged on the motor base. The motor shaft of the stepping 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 housing and is meshed with the external gear ring on one side of the adjusting gear. The claw assemblies (2) are respectively provided in the notches at both sides of the bottom of the housing base. When the screw assembly (9) extends into the housing from the top of the housing cover and is meshed with the internal thread at the inner diameter of the adjusting gear, the screw assembly extends out of the bottom of the housing base.

9. The hook-type coffee machine brewer according to claim 1, wherein Two liquid outlet holes are symmetrically provided inside 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. The liquid outlet pipes at the liquid outlet holes respectively extend out of the top of the housing of the brewing head assembly to the pipeline rack (10).

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