Accurate quantitative grinding mechanism for coffee beans

Abstract

The utility model relates to an accurate quantitative grinding mechanism for coffee beans, and aims to solve the technical problems that a weighing module structure of an existing similar product is difficult to be integrally assembled and used with a bean grinding assembly, beans are easy to scatter when a bean box of the bean grinding assembly is taken out, the bean box is difficult to automatically lock when the bean box is taken out, and the beans are easy to block in the bean discharging process. The mechanism is characterized in that a bean discharging gear in a bean discharging assembly main body below a bean box at a bean box assembly of the mechanism is driven by a transmission shaft at a synchronous motor on one side of the outer diameter to rotate to discharge beans, and meanwhile, a bean discharging shifting piece is arranged on one side of the bean discharging gear in the bean discharging assembly main body, and one end of the bean discharging shifting piece abuts against one blade of the bean discharging gear; the other end of the bean feeding shifting piece is hinged and fixed in the bean feeding assembly body to swing, a torsion spring is arranged on the hinged position or a positioning column on one side of the hinged position, the shaft portion of a vertically-arranged bean feeding gear is aligned with a bottom hole opening of an upper bean box, and the bottom hole opening of the upper bean box is rectangular. And a bottom hole of the bean feeding assembly main body below the shaft part at the bean feeding gear is aligned with the bean feeding channel.

Description

Technical Field

[0001] The utility model relates to a coffee bean box grinding mechanism, which is a precise quantitative grinding mechanism for coffee beans. Background Art

[0002] A coffee machine is a fully automatic or semi-automatic appliance that integrates the entire process of brewing coffee, including grinding, pressing, filling, brewing, and removing grounds. Usually, when grinding coffee powder, a certain amount of coffee beans needs to be put into a bean box and ground by a grinder. However, in most cases, it is difficult to control the amount of coffee beans, and most users are non-professionals and cannot quantitatively grind the amount of coffee powder they need. For this reason, some coffee machines' bean grinding devices are equipped with weighing sensors, such as the application number 202222055287.0 disclosed in the Chinese patent literature, the authorization announcement date 2022.12.13, and the utility model name "A bean grinder for accurately measuring coffee powder"; another example is the application number 202322107588.8 disclosed in the Chinese patent literature, the authorization announcement date 2023.03.12, and the utility model name "A bean feeding device for a coffee machine"; but the bean feeding of the above-mentioned products is mainly achieved through horizontal or vertical screws (screw rods), resulting in lower accuracy. At the same time, the weighing sensors of such products are not well positioned, which makes production and assembly more inconvenient and the accuracy is poor. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a precise quantitative grinding mechanism for coffee beans in the art, so as to solve the technical problems that the weighing module structure design and position setting of the existing similar products are poor, which makes it difficult to assemble and use the grinding bean assembly as a whole, and the bean box of the grinding bean assembly is easy to spill when it is taken out, and it is difficult to achieve automatic locking of the bean box when it is taken out, and the beans are easy to get stuck during the bean feeding process. The purpose is achieved through the following technical solutions.

[0004] A precise quantitative grinding mechanism for coffee beans, comprising a bean box assembly, a bean grinding assembly and a weighing module, wherein the bean box assembly and the bean grinding assembly are respectively arranged on a bracket in a coffee machine, and the weighing module is arranged on the bracket in the coffee machine through a weighing module bracket. At the same time, the weighing module is arranged at the bottom of a lower bean assembly fixing frame, and a weighing sensor is arranged in the weighing module; a lower bean assembly main body is arranged in the lower bean assembly fixing frame, and coffee beans in a bean box at the top of the lower bean assembly main body enter the bean grinding assembly below the bean box assembly through a bean pushing channel in the lower bean assembly main body and a bean dropping channel at the bottom for grinding, and a powder outlet channel is arranged on one side of a chamber below a grinding knife in a grinder main body assembly of the grinding bean assembly. The key points of its structural design are that the bean lowering gear in the bean lowering assembly body below the bean box of the bean box assembly is driven to rotate by the transmission shaft of the synchronous motor on the outer diameter side to lower the beans. At the same time, a bean lowering paddle is provided on one side of the bean lowering gear in the bean lowering assembly body. One end of the bean lowering paddle is against one of the blades of the bean lowering gear. The other end of the bean lowering paddle is hinged and fixed in the bean lowering assembly body to swing. A torsion spring is provided at the hinge or at the positioning column on one side of the hinge. The shaft of the vertically arranged bean lowering gear is aligned with the bottom opening of the upper bean box. The bottom opening of the upper bean box is rectangular. The bottom opening of the bean lowering assembly body below the shaft of the bean lowering gear is aligned with the bean lowering channel. The above structure ensures that the coffee beans are accurately and quantitatively ground during the bean lowering process. At the same time, when the bean box assembly is taken out, the bean lowering gear will jam the residual coffee beans inside, and prevent the coffee beans from spilling out, or prevent the coffee beans from remaining in the bean grinding assembly. The motor shaft of the stepper motor can further adopt a gear assembly in the gear box, which is connected to the transmission gear 1 below through the extended eccentric shaft, or the motor shaft of the stepper motor is directly connected to the center hole of the lower bean pick or the transmission gear 1 below. The grinding knife structure adopts an upper and lower cone knife structure, or a disc grinding knife. The grinding mechanism mainly adopts the following specific upper and lower cone knife structure.

[0005] A transmission gear 2 integrated in the bean lowering assembly body is arranged on one side of the central axis of the bean lowering gear, and a transmission gear 2 on the outer diameter side is meshed with a transmission gear 1 in the bean lowering assembly body, and a central hole of the transmission gear 1 is connected to a transmission shaft of a stepper motor at the outer diameter of the bean lowering assembly body. The bean lowering gear transmits torque through the transmission gear 2 and the transmission gear 1, thereby improving its stability and reducing the power and volume of the corresponding motor.

[0006] The bean lowering assembly body of the bean box assembly comprises a gear box front cover, a gear box body and a bean lowering assembly fixing frame, the gear box front cover, the gear box body, the bean lowering assembly fixing frame and the bean box are connected as a whole, the torsion spring, the bean lowering paddle, the bean lowering gear, the transmission gear 1 and the transmission gear 2 are arranged in a large opening on one side of the gear box body in the bean lowering assembly fixing frame, and one end of the transmission gear 2 extends out of a small opening on the other side of the gear box body and is connected to the transmission shaft of the stepping motor. The above is a specific embodiment of the bean box assembly structure, and it can also adopt a left and right shell combination to replace the front cover, the gear box body and the bean lowering assembly fixing frame.

[0007] The bean box of the bean box assembly is funnel-shaped, and screw holes are provided on the symmetrical side ears on both sides of the outer diameter of the bottom hole of the bean box. The above is a structural embodiment of the bean box, and other shapes can also be used, that is, a square bean box can also be set on the top of the funnel-shaped bean box.

[0008] The blades of the bean lowering gear are arranged in the form of helical gear blades. The blades of the bean lowering gear are designed in the shape of helical gear blades to prevent beans from getting stuck during the bean lowering process.

[0009] The grinding blade of the bean grinding assembly is eccentrically arranged on one side below the shaft of the bean feeding gear, and the opening on one side of the top of the bean feeding channel is exposed to the bottom side of the bean box assembly. The above structural design makes it difficult for beans to be stuck or blocked in the bean grinding assembly, and the bean feeding channel between the bean grinding assembly and the bean box assembly is airtight.

[0010] One end of the weighing module is fixed to the edge of one side of the bottom hole of the gear box body of the bean placing assembly body through the weighing module bracket, and the other end of the weighing module is fixed in the groove. The above structure is convenient for the production and assembly of the weighing module, and is not easy to affect the bean-pushing channel in the bean placing assembly body and the bean placing channel at the bottom, and is convenient for the weighing module to sense the weight change in real time during the bean placing process.

[0011] The grinding knife of the bean grinding assembly includes a lower cone knife in the grinder main body assembly, and an upper cone knife assembly is arranged in the cone knife adjustment disk above the lower cone knife, the lower cone knife extends above the powder sweeping gear in the grinder main body assembly, the lower cone knife is installed in a circular groove just above the grinder main body, and the outer grinder main body assembly outside the lower cone knife is provided with a cone knife adjustment disk, the cone knife adjustment disk is driven to rotate by the outer diameter side adjustment motor, and the lower cone knife is driven to rotate by the bean grinding motor in the grinder main body assembly. The above is a structural embodiment of the combination of upper and lower cone knives and cone knife adjustment disks, so as to facilitate the adjustment and setting of coarse and fine grinding.

[0012] The conical blade adjustment disk is limitedly sleeved on the top opening of the grinder main body component through the adjustment disk fixing pieces symmetrically arranged on both sides of the inner diameter of the bottom disk opening. At the same time, the conical blade adjustment disk is inserted into the outer ring of the grinder main body component outside the groove of the lower conical blade, and the convex rib on one side of the positioning piece at the outer ring edge of the raised outer ring of the upper conical blade component is inserted into the positioning groove inside the annular groove of the outer ring of the outer grinder main body component. The three equidistantly arranged columnar protrusions on the outer diameter of the upper conical blade component are placed into the track inside the guide groove of the conical blade adjustment disk through the notches at the three guide grooves on the inner wall of the conical blade adjustment disk. A bean-pushing plate can also be arranged on the top of the lower conical blade. The above structure is the specific installation structure of the conical blade adjustment disk, and the specific structural implementation of the upper conical blade component, so as to facilitate the loading and unloading of the upper conical blade component.

[0013] The adjusting disk fixing plate is provided with point holes, and the point holes of the adjusting disk fixing plate correspond to the point posts on the outer ring of the grinder main body component outside the groove of the lower cone. The above-mentioned metal adjusting disk fixing plate is fixed point to point and face to face, which solves the technical problem of unstable grinding coarseness due to insufficient strength during the rotation of the plastic cone adjusting disk.

[0014] The bottom outer diameter side of the conical blade adjustment disk is provided with an arc-shaped convex point, and the grinder main body component corresponding to the arc-shaped convex point is provided with a micro switch. The above structural design facilitates the conical blade adjustment disk of the bean grinding component to automatically monitor and find the zero position through the adjustment motor when the machine is turned on, and the arc-shaped convex point of the conical blade adjustment disk triggers the micro switch; the adjustment motor is connected to the circuit board of the control panel through the line, and the control panel is provided with a coarse and fine adjustment gear button, so that the coarse and fine gear can be adjusted and set by the button without the need for a knob.

[0015] The bean grinding motor is a horizontal motor, the outer diameter teeth of the cone cutter adjusting disk are driven to rotate by the gear assembly meshing with each other at the output shaft of the adjusting motor, the adjusting motor is fixedly arranged on one side of the grinder main body assembly, the horizontal motor is arranged on the other symmetrical side of the grinder main body assembly, the transmission shaft of the horizontal motor is meshed with the gear at the shaft rod at the bottom of the lower cone cutter through the worm and the worm gear assembly, and the horizontal motor and the adjusting motor are arranged at 90 degrees between the two ends of the grinder main body assembly. The above structure reduces the space occupied by the bean grinding motor and reduces the power and volume of the bean grinding motor.

[0016] The utility model has a reasonable structural design and is easy to produce and use, especially the overall assembly is convenient. The vertically arranged and rotating bean feeding gear is convenient for accurate quantitative feeding during the bean feeding process. The bean box assembly is easy to take out and put in, and it is not easy to cause bean jamming and bean spilling. The coarseness of the coffee bean grinding is easy to set and reset. The utility model is suitable for use as a precise quantitative grinding mechanism for coffee beans, and is a further improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a partial explosion structure of the utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure after assembly.

[0019] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure on the other side, in which the dotted line represents part of the internal structure.

[0020] Figure 4 yes Figure 1 The cross-sectional structure of Figure 1 .

[0021] Figure 5 yes Figure 1 The cross-sectional structure of Figure 2 .

[0022] Figure 6 yes Figure 1 Schematic diagram of the structure of the bean box component in the removed state, where the dotted line in the figure represents part of the internal structure of the bean box component.

[0023] Serial numbers and names of the accompanying drawings: 1. Bean box assembly, 2. Bean grinding assembly, 201. Grinder main body assembly, 202. Lower conical knife, 203. Adjustment motor, 3. Gear box front cover, 4. Torsion spring, 5. Lower bean paddle, 6. Lower bean gear, 7. Transmission gear 1, 8. Transmission gear 2, 9. Gear box body, 10. Bean box, 11. Weighing module, 12. Weighing module bracket, 13. Stepping motor, 14. Lower bean assembly fixing frame, 15. Lower bean channel, 16. Upper conical knife assembly, 1601. Positioning piece, 1602. Columnar bump, 17. Adjustment disk fixing piece, 18. Conical knife adjustment disk. Implementation

[0024] Now, in conjunction with the accompanying drawings, the structure and use of the utility model are further described. Figure 1-Figure 6 As shown, the mechanism includes a bean box assembly 1, a bean grinding assembly 2 and a weighing module 11, wherein the bean box assembly and the bean grinding assembly are respectively arranged on a bracket in the coffee machine, and the weighing module is arranged on the bracket in the coffee machine through a weighing module bracket 12. At the same time, the weighing module is arranged at the bottom of a lower bean assembly fixing frame 14, and a weighing sensor is arranged in the weighing module; a lower bean assembly body is arranged in the lower bean assembly fixing frame, and coffee beans in a bean box 10 at the top of the lower bean assembly body enter the bean grinding assembly below the bean box assembly through a bean pushing channel in the lower bean assembly body and a bean dropping channel 15 at the bottom for grinding, and a powder outlet channel is arranged on one side of a chamber below the grinding knife in a grinder main body assembly 201 of the grinding bean assembly. The bean lowering gear 6 in the bean lowering assembly body below the bean box of the bean box assembly is driven to rotate by the transmission shaft at the stepping motor 13 on the outer diameter side to lower the beans. At the same time, a bean lowering paddle 5 is provided on one side of the bean lowering gear in the bean lowering assembly body. One end of the bean lowering paddle is abutted against one of the blades of the bean lowering gear, and the other end of the bean lowering paddle is hinged and fixed in the bean lowering assembly body for swinging. A torsion spring 4 is provided at the hinge or at a positioning column on one side of the hinge. The shaft of the vertically arranged bean lowering gear is aligned with the bottom opening of the upper bean box. The bottom opening of the upper bean box is rectangular, and the bottom opening of the bean lowering assembly body below the shaft of the bean lowering gear is aligned with the bean lowering channel 15.

[0025] The above-mentioned specific structure is as follows: a transmission gear 2 8 integrated in the bean lowering assembly body is arranged on one side of the central axis of the above-mentioned bean lowering gear, and a transmission gear 1 7 is meshed with a transmission gear 1 7 in the bean lowering assembly body on one side of the outer diameter of the transmission gear 2, and a central hole of the transmission gear 1 is connected to a transmission shaft of a stepper motor at the outer diameter of the bean lowering assembly body. The bean lowering assembly body of the bean box assembly comprises a gear box front cover, a gear box body 9 and a bean lowering assembly fixing frame 14, the gear box front cover, the gear box body, the bean lowering assembly fixing frame and the bean box are connected as a whole, a torsion spring, a bean lowering paddle, a bean lowering gear, a transmission gear 1 and a transmission gear 2 are arranged in a large opening on one side of the gear box body in the bean lowering assembly fixing frame, and one end of the transmission gear 2 extends out of a small opening on the other side of the gear box body and is connected to a transmission shaft of a stepper motor. The bean box of the bean box assembly is funnel-shaped, and screw holes are arranged on the symmetrical side ears on both sides of the outer diameter of the bean box bottom opening; the blades of the bean lowering gear are arranged as helical blades. The grinding knife of the bean grinding assembly is eccentrically arranged on one side below the shaft of the bean lowering gear, and the top opening of the bean lowering channel is exposed to the bottom side of the bean box assembly. One end of the weighing module is fixed to the edge of one side of the bottom opening of the gear box body of the bean lowering assembly body through a weighing module bracket, and the other end of the weighing module is fixed in the groove.

[0026] The grinding knife of the bean grinding assembly includes a lower conical knife 202 in the grinder main body assembly, and an upper conical knife assembly 16 is arranged in the conical knife adjustment disk 18 above the lower conical knife, the lower conical knife extends out from above the powder sweeping gear in the grinder main body assembly, and the lower conical knife is installed in a circular groove just above the grinder main body. The outer grinder main body assembly outside the lower conical knife is provided with a conical knife adjustment disk 18, and the conical knife adjustment disk is driven to rotate by an outer diameter side adjustment motor 203, and the lower conical knife is driven to rotate by the bean grinding motor in the grinder main body assembly. The cone blade adjustment disk is limitedly fitted into the top hole of the grinder main body component through the adjustment disk fixing pieces 17 symmetrically arranged on both sides of the inner diameter of the bottom disk opening. At the same time, the cone blade adjustment disk is inserted into the outer ring of the grinder main body component outside the groove of the lower cone blade. The convex rib on one side of the positioning piece 1601 at the outer ring edge of the raised bottom of the upper cone blade component is inserted into the positioning groove in the inner annular groove of the outer ring of the outer grinder main body component. The three equidistant columnar protrusions 1602 arranged on the outer diameter of the upper cone blade component are placed into the guide groove track of the cone blade adjustment disk through the three guide grooves of the inner wall of the cone blade adjustment disk. The adjustment disk fixing pieces are respectively provided with point holes, and the point holes of the adjustment disk fixing screen correspond to the point columns on the outer ring of the grinder main body component outside the groove of the lower cone blade. An arc-shaped protrusion is arranged on one side of the bottom outer diameter of the cone blade adjustment disk, and the grinder main body component corresponding to the arc-shaped protrusion is provided with a micro switch. The bean grinding motor is a horizontal motor. The outer diameter teeth of the conical cutter adjustment disk are driven to rotate through the gear assembly that meshes with each other at the output shaft of the adjustment motor. The adjustment motor is fixedly arranged on one side of the grinder main body assembly. A horizontal motor is arranged on the other symmetrical side of the grinder main body assembly. The transmission shaft of the horizontal motor meshes with the gear at the shaft rod at the bottom of the lower conical cutter through a worm and a worm gear assembly. The horizontal motor and the adjustment motor are arranged at 90 degrees between the two ends of the grinder main body assembly.

[0027] The above-mentioned mechanism is specifically composed of a bean box assembly, a bean grinding assembly and a weighing module. The bottom of the bean box of the bean box assembly is connected and fixed by two arched screw holes corresponding to the two screw holes of the gear box body below. There are two positioning columns in the upper left corner of the gear box body. The positioning column on the right side is connected to the positioning hole of the lower bean pick correspondingly, and the positioning column on the other side on the left side is connected to the torsion spring correspondingly, and the top is provided with a columnar boss, which is inserted into the hole position on the front cover of the gear box and fixed. A circular gap is provided on the right side of the gear box body and on the left side of the bottom of the lower bean pick to position the torsion spring; two openings, one large and one small, are arranged one in front and the other in the back, and the small opening is connected to the transmission gear 2 correspondingly to buckle the mushroom-shaped boss at the bottom of the transmission gear 2. A cross-shaped boss is provided on the top of the transmission gear 2 to connect with the cross-shaped groove at the bottom of the lower bean gear; the lower part of the gear box body A lower bean fixing frame for receiving the bean box assembly is provided on the side, and a circular opening is provided on the back of the lower bean fixing frame. Two cylindrical protrusions and screw holes are provided on both sides of the large opening, which are symmetrical left and right and up and down, and are used to fix the four hole positions of the stepper motor. The rotating rod on the stepper motor is connected to the notch at the bottom of the transmission gear; the conical knife adjustment disk is inserted into the outer ring of the lower conical knife groove, and the adjusting disk fixing plate is placed in the conical knife adjustment disk. The two smallest holes on the adjusting disk fixing plate are aligned with the guide columns on the grinder body directly below and installed, and are face-to-face fitted point to point; at the same time, the three large holes of the adjusting disk fixing plate are aligned with the screw holes on the grinder body and fixed with the adjusting disk fixing screws. There are three cylindrical protrusions on the upper conical knife assembly. The three cylindrical protrusions are aligned with the three guide grooves on the inner diameter of the conical knife adjustment disk and are placed vertically, and then the lower bean channel is placed vertically into the hole opening of the upper conical knife assembly in the movable adjustment disk.

[0028] The operation of the mechanism is as follows: in the initial state before starting work, first put the bean box assembly into the lower bean assembly fixing frame, then put the coffee beans (for example 39g) into the bean box, and the coffee beans fall into the cavity along the channel. The stepper motor rotates counterclockwise to drive the transmission gear 1 connected to it, and the transmission gear 1 drives the transmission gear 2 to rotate counterclockwise. At the same time, the transmission gear 2 drives the lower bean gear to rotate counterclockwise. At this time, during the bean lowering process, the lower bean gear 8 pushes the lower bean paddle, and the torsion spring pushes the lower bean paddle back to its original position. This movement is repeated. During this movement, the coffee beans take the opportunity to fall from the gap between the two and fall into the grinding assembly along the bean lowering channel. During this process, the weighing module actually records the weight change.

[0029] In summary, this mechanism is a mechanism for quantitatively controlling the amount of coffee beans fed in, thereby controlling the weight of the coffee beans that need to be ground. At the same time, due to the special setting of the bean feeding gear, this mechanism can well solve the problem of residual coffee beans on the upper knife of the grinding system after removing the bean box assembly.

Claims

1. A precise quantitative grinding mechanism for coffee beans, the mechanism comprising a bean box assembly (1), a bean grinding assembly (2) and a weighing module (11), wherein the bean box assembly and the bean grinding assembly are respectively arranged on a bracket in a coffee machine, the weighing module is arranged on the bracket in the coffee machine via a weighing module bracket (12), and the weighing module is arranged at the bottom of a lower bean assembly fixing frame (14), and a weighing sensor is arranged in the weighing module; a lower bean assembly main body is arranged in the lower bean assembly fixing frame, and coffee beans in a bean box (10) at the top of the lower bean assembly main body enter the bean grinding assembly below the bean box assembly through a bean pushing channel in the lower bean assembly main body and a bean dropping channel (15) at the bottom for grinding, and a powder outlet channel is arranged on one side of the chamber below the grinding knife in the grinder main body assembly (201) of the grinder assembly; characterized in that A bean lowering gear (6) in a bean lowering assembly body below the bean box (10) of the bean box assembly (1) is driven to rotate by a transmission shaft at a stepping motor (13) on one side of the outer diameter to lower beans. At the same time, a bean lowering paddle (5) is provided on one side of the bean lowering gear in the bean lowering assembly body. One end of the bean lowering paddle abuts against one of the blades of the bean lowering gear. The other end of the bean lowering paddle is hinged and fixed in the bean lowering assembly body to swing. A torsion spring (4) is provided at a positioning column at or on one side of the hinge. The shaft of the vertically arranged bean lowering gear is aligned with a bottom opening of the upper bean box. The bottom opening of the upper bean box is rectangular. The bottom opening of the bean lowering assembly body below the shaft of the bean lowering gear is aligned with the bean lowering channel (15).

2. The coffee bean precise quantitative grinding mechanism according to claim 1, characterized in that A transmission gear 2 (8) integrated in the bean lowering assembly body is provided on one side of the central axis of the bean lowering gear (6); the outer diameter side of the transmission gear 2 meshes with the transmission gear 1 (7) in the bean lowering assembly body; the central hole of the transmission gear 1 is connected to the transmission shaft of the stepping motor (13) at the outer diameter of the bean lowering assembly body.

3. The coffee bean precise quantitative grinding mechanism according to claim 2, characterized in that The bean lowering assembly body of the bean box assembly (1) comprises a gear box front cover (3), a gear box body (9) and a bean lowering assembly fixing frame (14); the gear box front cover, the gear box body, the bean lowering assembly fixing frame and the bean box (10) are connected as a whole; a torsion spring (4), a bean lowering paddle (5), a bean lowering gear (6), a transmission gear 1 (7) and a transmission gear 2 (8) are arranged in a large opening on one side of the gear box body in the bean lowering assembly fixing frame; one end of the transmission gear 2 extends out of a small opening on the other side of the gear box body and is connected to a transmission shaft of a stepping motor (13).

4. The coffee bean precise quantitative grinding mechanism according to claim 1, characterized in that The bean box (10) of the bean box assembly (1) is funnel-shaped, and screw holes are respectively provided on the symmetrical side ears on both sides of the outer diameter of the hole at the bottom of the bean box.

5. The coffee bean precise quantitative grinding mechanism according to claim 1, characterized in that The blades of the bean lowering gear (6) are arranged in the form of helical blades.

6. The coffee bean precise quantitative grinding mechanism according to claim 1, characterized in that The grinding knife of the bean grinding assembly (2) is eccentrically arranged on one side below the shaft of the bean lowering gear (6), and an opening on one side of the top of the bean lowering channel (15) is exposed from the bottom side of the bean box assembly (1).

7. The coffee bean precise quantitative grinding mechanism according to claim 1, characterized in that One end of the weighing module (11) is fixed to one side edge of the bottom opening of the gear box body (9) of the bean lowering assembly body through a weighing module bracket (12), and the other end of the weighing module is fixed in the groove.

8. The coffee bean precise quantitative grinding mechanism according to claim 1, characterized in that The grinding blade of the bean grinding assembly (2) comprises a lower conical blade (202) in a grinder main body assembly (201), and an upper conical blade assembly (16) arranged in a conical blade adjustment disk (18) above the lower conical blade, the lower conical blade extending above the powder sweeping gear in the grinder main body assembly, the lower conical blade being installed in a circular groove directly above the grinder main body, the outer grinder main body assembly outside the lower conical blade is provided with a conical blade adjustment disk (18), the conical blade adjustment disk is driven to rotate by an outer diameter side adjustment motor (203), and the lower conical blade is driven to rotate by a bean grinding motor in the grinder main body assembly.

9. The coffee bean precise quantitative grinding mechanism according to claim 8, characterized in that The conical blade adjustment disk (18) is limitedly sleeved on the top hole of the grinder main body component (201) through the adjustment disk fixing plates (17) symmetrically arranged on both sides of the inner diameter of the bottom disk opening. At the same time, the conical blade adjustment disk is inserted into the outer ring of the grinder main body component outside the groove at the lower conical blade (202). The convex rib on one side of the positioning plate (1601) at the outer ring edge of the bottom protrusion of the upper conical blade component (16) is inserted into the positioning groove in the inner ring groove of the outer ring of the outer grinder main body component. The three columnar protrusions (1602) equidistantly arranged on the outer diameter of the upper conical blade component are placed into the guide groove inner track of the conical blade adjustment disk through the notches at the three guide grooves on the inner wall of the conical blade adjustment disk.

10. The coffee bean precise quantitative grinding mechanism according to claim 9, characterized in that The adjusting disk fixing plates (17) are respectively provided with positioning holes, and the positioning holes of the adjusting disk fixing screen correspond to the positioning columns on the outer ring of the grinder main body component outside the groove at the lower cone cutter (202).

11. The coffee bean precise quantitative grinding mechanism according to claim 8, characterized in that An arc-shaped convex point is provided on one side of the outer diameter of the bottom of the conical blade adjustment disk (18), and a micro switch is provided on the grinder main body component (201) corresponding to the arc-shaped convex point.

12. The coffee bean precise quantitative grinding mechanism according to claim 8, characterized in that The bean grinding motor is a horizontal motor. The outer diameter teeth of the cone cutter adjustment disk are driven to rotate through a gear assembly meshing with each other at the output shaft of the adjustment motor (203). The adjustment motor is fixedly arranged on one side of the grinder main body assembly (201). A horizontal motor is arranged on the other symmetrical side of the grinder main body assembly. The transmission shaft of the horizontal motor meshes with the gear at the shaft rod at the bottom of the lower cone cutter (202) through a worm and a worm gear assembly. The horizontal motor and the adjustment motor are arranged at 90 degrees between the two ends of the grinder main body assembly.

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