Coarse and fine grinding device of full-automatic coffee machine

Abstract

The utility model relates to a coarse and fine grinding device of a full-automatic coffee machine, and aims to solve the technical problems that a coarse and fine adjusting mechanism is difficult to automatically return to zero and realize detection after grinding and before restarting of the conventional similar product, and the coarse and fine adjusting mechanism is difficult to automatically adjust gear selection through a key. The grinding device is characterized in that the outer diameter of an upper conical cutter assembly of the grinding device is provided with three columnar protruding points arranged at equal intervals, one side of the outer diameter of the bottom of a conical cutter adjusting disc is provided with an arc-shaped protruding point, a grinder body assembly corresponding to the arc-shaped protruding point is provided with a microswitch, and the conical cutter adjusting disc is driven by a stepping motor to rotate; the range of the adjusting angle between outer diameter tooth openings at the conical cutter adjusting disc is 85 degrees, the gear change of rotating the conical cutter adjusting disc every time is 3.4 degrees, and the total number of the gears is 25; therefore, the thickness degree is set through a thickness adjusting gear key of the control panel, a cone cutter adjusting disc of the bean grinding assembly automatically monitors and searches a zero position through a stepping motor during starting, and an arc-shaped protruding point of the cone cutter adjusting disc triggers a microswitch.

Description

Technical Field

[0001] The utility model relates to a coffee bean grinding mechanism, which is a coarse and fine grinding device for a full-automatic coffee machine. 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 dregs. Usually, when grinding coffee powder, it is necessary to adjust the coarseness of the grinding according to personal preference, especially drip coffee machines have higher requirements for the fineness of coffee bean grinding. The coarseness adjustment of this type of coffee machine is generally achieved through the knob on the machine body, such as the application number 202320048768.0 disclosed in the Chinese patent document, the authorization announcement date is 2023.06.23, and the utility model name is "grinding device for drip coffee machine"; the grinding mechanism of this type of coffee machine, such as the application number 202110647506.1 disclosed in the Chinese patent document, the application announcement date is 2021.08.06, and the invention name is "coffee grinder". However, it is difficult for the above-mentioned products and similar products to automatically reset the coarseness adjustment mechanism to zero and realize detection before restarting after grinding, and it is difficult for the coarseness adjustment mechanism to automatically adjust the gear selection through the button, and it is easy to cause powder blockage, powder accumulation and powder retention. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a fully automatic coffee machine coarse and fine grinding device to the art, so as to solve the technical problems of the existing similar products that it is difficult to automatically reset the coarse and fine adjustment mechanism to zero and realize detection before restarting the machine after grinding, and the coarse and fine adjustment mechanism is difficult to automatically adjust the gear selection through the button, and it is easy to cause powder blockage, powder accumulation and powder retention. The purpose is achieved through the following technical solutions.

[0004] A coarse and fine grinding device for a fully automatic coffee machine, the device comprises a bean box assembly and a bean grinding assembly, the bean sweeping gear in the bean bin of the bean box assembly is driven to rotate by the output shaft of the bottom synchronous motor to feed the beans, the coffee beans in the bean feeding process enter the grinding knife of the bean grinding assembly through the bean feeding channel of the bean grinding assembly to be ground, and the ground coffee beans are discharged through the powder outlet channel of the bean grinding assembly; the powder outlet channel of the bean grinding assembly is arranged at a side shell below the powder sweeping cavity of the grinder main assembly, a protruding lower conical knife is arranged above the powder sweeping gear in the powder sweeping cavity of the grinder main assembly, the lower conical knife is installed in a circular groove just above the grinder main body, the outer grinder main assembly outside the lower conical knife is provided with a conical knife adjusting disk, the conical knife adjusting disk is driven to rotate by a stepping motor, and the lower conical knife is driven to rotate by the bean grinding motor. The key points of its structural design are that an upper conical knife assembly is arranged in the conical knife adjustment disk of the bean grinding assembly, and three equidistantly arranged columnar protrusions on the outer diameter of the upper conical knife assembly are placed into the track in the introduction groove of the conical knife adjustment disk through the notches at the three introduction grooves on the inner wall of the conical knife adjustment disk, an arc-shaped protrusion is arranged on one side of the outer diameter of the bottom of the conical knife adjustment disk, and a grinder main body assembly corresponding to the arc-shaped protrusion is provided with a micro switch, and the conical knife adjustment disk is limitedly sleeved on the top hole of the grinder main body assembly through the adjustment disk fixing pieces symmetrically arranged on both sides of the inner diameter of the bottom disk opening, and at the same time, the conical knife adjustment disk is clamped into the outer ring of the grinder main body assembly outside the lower conical knife groove, and the positioning column at the outer ring edge of the bottom protrusion of the adjustment disk fixing piece is inserted into the positioning groove in the inner annular groove of the outer ring of the outer grinder main body assembly; the conical knife adjustment disk of the bean grinding assembly automatically monitors and finds the zero position through the stepping motor when the machine is turned on, and the arc-shaped protrusion of the conical knife adjustment disk triggers the micro switch. Thereby, the stepper motor can adjust the rotation of the cone knife adjustment disk in forward and reverse rotation, realize the automatic adjustment gear of the coarseness and fineness of grinding by the button, and the automatic return to zero of the cone knife adjustment disk; the columnar protrusion on the outer diameter of the upper cone knife assembly facilitates the separation and removal of the upper cone knife assembly from the cone knife adjustment disk, and is fixedly connected to the cone knife adjustment disk as a whole, and the grinding gap between the upper cone knife assembly and the lower cone knife is adjusted by adjusting the rotation of the cone knife adjustment disk, so as to realize the adjustment of the grinding coarseness and fineness of the coffee beans.

[0005] The adjustment angle range between the outer diameter teeth of the cone knife adjustment disk is 85°, and the gear position of the cone knife adjustment disk changes by 3.4° each time the cone knife adjustment disk is turned, with a total of 25 gears; the stepper motor is connected to the circuit board of the control panel through a line, and the control panel is provided with a coarseness adjustment gear button. Thus, the coarseness is set by the coarseness adjustment gear button of the control panel, and the stepper motor automatically drives the cone knife adjustment disk to rotate to the set coarseness. Existing similar products generally use a knob to set and adjust the coarseness.

[0006] The bottom annular ring surface of the cone cutter adjustment disk is provided with arc-shaped teeth arranged symmetrically in pairs, and a protruding ejector is provided on the grinder main body assembly at the bottom of one side of the arc-shaped teeth, and the ejector is against the arc-shaped teeth on one side of the bottom of the cone cutter adjustment disk, and the arc-shaped teeth are the coarse and fine adjustment stroke of the cone cutter adjustment disk. The above facilitates the coarse and fine adjustment stroke control of the cone cutter adjustment disk, so that the cone cutter adjustment disk generates a damping force during its rotation, and does not cause thread slippage or loosening.

[0007] The bean grinding motor is a horizontal motor, the outer diameter tooth opening of the cone cutter adjustment disk is meshed with the transmission gear 1, the transmission gear 1 is meshed with the transmission gear 2, the transmission gear 2 is connected to the motor shaft of the stepper motor extending out of the grinder main assembly, the stepper motor is fixedly arranged on one side of the grinder main assembly, and the symmetrical other side of the grinder main assembly is provided with a horizontal motor, 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, the worm gear assembly is a combination of upper and lower double-layer integrated large and small worm gears and cylindrical gears, and is arranged in the grinder main assembly through the bottom cover at the bottom of the grinder main assembly; the transmission gear 2 of the grinder main assembly is arranged at 90 degrees through the central axis of the three between the transmission gear 1 and the cone cutter adjustment disk, and the horizontal motor. The above-mentioned transmission gear 1 and the worm gear assembly are arranged as needed, and the horizontal motor and the worm structure can also be replaced by the existing reduction gear and vertical motor combination. The 90-degree setting between the above three and the horizontal motor setting are set to reduce the space occupied by the corresponding components.

[0008] The bottom of the shaft of the transmission gear 1 is provided with symmetrically arranged hooks, and the bottom of the shaft of the transmission gear 1 is fixed with the grinder main body assembly through the hooks.

[0009] The pins symmetrically arranged in pairs on the top of the powder sweeping gear in the grinder main body assembly are inserted into the bottom of the lower cone cutter, the shaft of the gear at the bottom of the lower cone cutter is connected to the lower cone cutter through the powder sweeping gear, and the powder sweeping gear is connected to the lower cone cutter and the gear at the bottom of the lower cone cutter. The above is a specific structural embodiment between the powder sweeping gear and the lower cone cutter and the gear at the bottom of the lower cone cutter.

[0010] The powder sweeping gear is tangential to the powder outlet channel, and the bottom of the powder sweeping cavity below the powder sweeping gear is sloped. This design effectively prevents the accumulation of residual powder during the powder outlet process and effectively prevents powder accumulation.

[0011] The top opening portion of the bean lowering passage extends out from one side of the bottom of the bean box assembly.

[0012] The inner diameter ring surface of the top opening of the upper cone cutter assembly is provided with a wire handle hingedly fixed to the upper cone cutter assembly, so that the upper cone cutter assembly can be easily taken out by rotating the wire handle.

[0013] The bean box assembly is fixed to the top of the grinder main body assembly of the bean grinding assembly through at least two bean lowering channel support frames at the bottom, and the bean lowering channel support frames are C-shaped.

[0014] The utility model has reasonable structural design, compact structure, small volume, and is not prone to powder blockage, powder accumulation and powder retention. In particular, the coarseness and fineness of coffee bean grinding can be easily set and reset. The utility model is suitable for use as a coarse and fine grinding device for a fully automatic coffee machine, and is a further improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model, in which the notch cover plate at the powder outlet channel is omitted.

[0016] Figure 2 yes Figure 1 A side view of a horizontal motor.

[0017] Figure 3 yes Figure 1 The bottom view of the powder sweeping gear is tangent to the powder outlet channel. The dotted line in the figure is part of the internal structure. The AA section view is made.

[0018] Figure 4 yes Figure 3 Schematic diagram of the bottom three-dimensional structure, in which the dotted line represents the internal gear structure.

[0019] Figure 5 yes Figure 3 AA cross-sectional structure schematic diagram.

[0020] Figure 6 yes Figure 1 Schematic diagram of the exploded structure of the grinding component Figure 1 .

[0021] Figure 7 yes Figure 1 Schematic diagram of the exploded structure of the grinding component Figure 2 .

[0022] Serial number and name of the accompanying drawings: 1. Bean box assembly, 2. Bean grinding assembly, 201. Bean lower channel, 202. Upper cone knife assembly, 2021. Columnar protrusion, 2022. Positioning column, 2023. Wire handle, 203. Adjustment disk fixing plate, 204. Cone knife adjustment disk, 2041. Introduction groove, 2042. Arc-shaped tooth mouth, 205. Transmission gear 1, 2051. Hook, 206. Transmission gear 2, 207. Grinder main body assembly, 2071. Positioning groove, 208. Stepper motor, 209. Powder outlet channel, 210. Horizontal motor, 211. Powder sweeping gear, 212. Lower cone knife, 213. Ejector, 3. Support frame for lower bean channel, 4. Micro switch. DETAILED DESCRIPTION

[0023] Now, in conjunction with the accompanying drawings, the structure and use of the utility model are further described. Figure 1-Figure 5 As shown, the device includes a bean box assembly 1 and a bean grinding assembly 2, the bean sweeping gear in the bean bin of the bean box assembly is driven to rotate by the output shaft of the bottom synchronous motor to feed the beans, the coffee beans in the bean feeding process enter the grinding knife of the bean grinding assembly through the bean feeding channel 201 of the bean grinding assembly to be ground, and the ground coffee beans are discharged through the powder outlet channel 209 of the bean grinding assembly; the powder outlet channel of the bean grinding assembly is arranged at a side shell below the powder sweeping cavity of the grinder main assembly 207, a protruding lower conical knife 212 is arranged above the powder sweeping gear 211 in the powder sweeping cavity of the grinder main assembly, the lower conical knife is installed in a circular groove just above the grinder main body, the outer grinder main assembly outside the lower conical knife is provided with a conical knife adjusting disk 204, the conical knife adjusting disk is driven to rotate by the stepping motor 208, and the lower conical knife is driven to rotate by the bean grinding motor. An upper conical knife assembly 202 is arranged in the conical knife adjustment disk of the above-mentioned bean grinding assembly. Three equidistantly arranged columnar protrusions 2021 on the outer diameter of the upper conical knife assembly are placed into the track in the introduction groove of the conical knife adjustment disk through the gaps at the three introduction grooves 2041 on the inner wall of the conical knife adjustment disk. An arc-shaped protrusion is arranged on one side of the outer diameter of the bottom of the conical knife adjustment disk. The grinder main body assembly corresponding to the arc-shaped protrusion is provided with a micro switch 4. The conical knife adjustment disk is limitedly fitted on the top opening of the grinder main body assembly through the adjustment disk fixing pieces 203 symmetrically arranged on both sides of the inner diameter of the bottom disk opening. At the same time, the conical knife adjustment disk is clamped into the outer ring of the grinder main body assembly outside the lower conical knife groove, and the positioning column 2022 at the outer ring edge of the bottom protrusion of the adjustment disk fixing piece is inserted into the positioning groove 2071 in the inner annular groove of the outer ring of the outer grinder main body assembly. The conical knife adjustment disk of the bean grinding assembly is automatically monitored and finds the zero position through the stepping motor when the machine is turned on, and the arc-shaped protrusion of the conical knife adjustment disk triggers the micro switch.

[0024] The adjustment angle range between the outer diameter teeth of the above-mentioned cone knife adjustment disk is 85°, and the gear position changes by 3.4° each time the cone knife adjustment disk is rotated, with a total of 25 gears; the stepper motor is connected to the circuit board of the control panel through a line, and the control panel is provided with a coarse and fine adjustment gear position button. The bottom annular ring surface of the cone knife adjustment disk is provided with arc-shaped teeth 2042 arranged symmetrically in pairs, and the grinder main body component at the bottom of one side of the arc-shaped teeth is provided with an extended ejector pin 213, and the ejector pin is against the arc-shaped teeth on one side of the bottom of the cone knife adjustment disk, and the arc-shaped teeth are the coarse and fine adjustment stroke of the cone knife adjustment disk.

[0025] The bean grinding motor is a horizontal motor 210, the outer diameter tooth opening of the cone cutter adjustment disk meshes with the transmission gear 1 205, the transmission gear 1 meshes with the transmission gear 2 206, the transmission gear 2 is connected to the motor shaft of the stepper motor extending out of the grinder main assembly, the stepper motor is fixedly arranged on one side of the grinder main assembly, and a horizontal motor is arranged on the symmetrical other side of the grinder main assembly, the transmission shaft of the horizontal motor meshes with the gear at the shaft rod at the bottom of the lower cone cutter through the worm and the worm gear assembly, the worm gear assembly is a combination of upper and lower double-layer integrated large and small worm gears and cylindrical gears, and is arranged in the grinder main assembly through the bottom cover at the bottom of the grinder main assembly; the transmission gear 2 of the grinder main assembly is arranged at 90 degrees through the central axis of the transmission gear 1 and the cone cutter adjustment disk, and the horizontal motor. The shaft bottom of the transmission gear 1 is provided with a symmetrically arranged hook 2051, and the shaft bottom of the transmission gear 1 fixes the grinder main assembly through the hook.

[0026] The pins symmetrically arranged in pairs at the top of the powder sweeping gear in the above-mentioned grinder main body assembly are inserted into the bottom of the lower cone cutter, and the shaft of the gear at the bottom of the lower cone cutter is connected to the lower cone cutter through the powder sweeping gear. The powder sweeping gear is connected to the lower cone cutter and the gear at the bottom of the lower cone cutter. The powder sweeping gear is tangent to the powder outlet channel, and the bottom of the powder sweeping cavity below the powder sweeping gear is arranged in a slope shape. The top opening of the lower bean channel extends out of the bottom side of the bean box assembly; the inner diameter ring surface of the top opening of the cone cutter assembly is provided with a wire handle 2023 hingedly fixed to the upper cone cutter assembly. The bean box assembly is fixed to the top of the grinder main body assembly of the grinding bean assembly through at least two lower bean channel support frames 3 at the bottom, and the lower bean channel support frames are C-shaped.

[0027] The horizontal motor of the above-mentioned device is connected to the cylindrical notch on one side of the grinder main body component, the lower cone cutter is installed in the circular groove just above the grinder main body component, a powder sweeping gear is arranged below the lower cone cutter, the bottom of the powder sweeping cavity below the powder sweeping gear is sloped, the powder sweeping gear is tangent to the powder outlet channel, the cone cutter adjustment disk is inserted into the outer ring of the grinder main body component outside the lower cone cutter groove, the adjustment disk fixing plate is put into the cone cutter adjustment disk, the two smallest holes on the adjustment disk fixing plate are aligned with the guide column on the grinder main body component just below, and the three large holes of the adjustment disk fixing plate are aligned with the grinding The screw holes on the grinder main assembly are aligned and fixed with the adjusting disk screws. There are three columnar protrusions on the upper conical knife assembly. The three columnar protrusions are aligned with the three guide slots on the conical knife adjusting disk and inserted, and then the lower bean channel is placed on the upper conical knife assembly. There are two large and small transparent round holes on the grinder main assembly. The four screw holes of the stepper motor are aligned with the four screw holes on the edge of the large round hole and fixed with screws. The transmission gear 2 is fixed on the motor shaft of the stepper motor. The transmission gear 1 is buckled into the small round hole next to the large round hole using a hook structure to undertake the transmission between the transmission gear 2 and the conical knife adjusting disk.

[0028] The upper cone knife assembly of the device is specifically installed as follows: first, align the three columnar protrusions on the upper cone knife assembly, and place the notches at the three guide slots of the cone knife adjustment disk downward into the inner track of the cone knife adjustment disk. Then, place the lower bean channel on top of the upper cone knife assembly, align the screw holes on the lower bean channel with the screw holes on the grinder main assembly, and use the lower bean channel left support frame and the lower bean channel right support frame to fix the support. Then, rotate the cone knife adjustment disk counterclockwise 85° to adjust to the finest position as the initial gear, and then press the "coarse" and "fine" buttons on the screen to adjust the gear according to needs. Press the "coarse" button, and the stepper motor starts to drive the transmission gear 2 to rotate clockwise, and the spacing between the upper and lower cone knives begins to decrease, and drives the transmission gear 1 and the cone knife adjustment disk to move counterclockwise. Each press rotates 3.4° counterclockwise for one gear, totaling 25 gears. Similarly, press the "fine" button, and the spacing between the upper and lower cone knives begins to increase in the opposite direction.

[0029] The coarseness adjustment button on the control panel is turned to the set coarseness, and the coffee beans enter the powder sweeping chamber of the grinder assembly and are ground while being put in. The horizontal motor drives the lower conical knife and the powder sweeping gear to rotate, and the ground coffee powder is swept out by the powder sweeping gear through the powder sweeping channel and falls into the powder outlet channel (the powder sweeping gear and the powder outlet channel are tangent to each other to avoid accumulation of residual powder and achieve almost zero residual powder).

[0030] In summary, the device uses a stepper motor to drive the gear transmission structure to automatically change the grinding coarseness and fineness gear. The columnar protrusion of the upper cone blade assembly cooperates with the notch at the guide groove of the cone blade adjustment disk for easy installation. The coffee grinding coarseness required by the user can be automatically adjusted through program control. After starting the machine, the existing similar products often fail to return to zero gear, which is not conducive to user operation. Therefore, the device adds a new function; after starting, if the arc-shaped protrusion on the cone blade adjustment disk does not touch the micro switch, the system defaults to not being in zero gear, and the stepper motor starts to drive the transmission gear connected to the cone blade adjustment disk to rotate clockwise until the arc-shaped protrusion of the cone blade adjustment disk touches the micro switch, then stops working, and the cone blade adjustment disk gear returns to zero.

Claims

1. A fully automatic coffee machine coarse and fine grinding device, the device comprising a bean box assembly (1) and a bean grinding assembly (2), wherein a bean sweeping gear in a bean bin of the bean box assembly is driven to rotate by an output shaft of a synchronous motor at the bottom to feed beans, the coffee beans in the bean feeding process enter the grinding knife of the bean grinding assembly through a bean feeding channel (201) of the bean grinding assembly to be ground, and the ground coffee beans are discharged through a powder outlet channel (209) of the bean grinding assembly; the powder outlet channel of the bean grinding assembly is arranged at a side shell below a powder sweeping cavity of a grinder main assembly (207), a protruding lower conical knife (212) is arranged above the powder sweeping gear (211) in the powder sweeping cavity of the grinder main assembly, the lower conical knife is installed in a circular groove just above the grinder main assembly, a conical knife adjusting disk (204) is arranged outside the lower conical knife in the grinder main assembly, the conical knife adjusting disk is driven to rotate by a stepping motor (208), and the lower conical knife is driven to rotate by the bean grinding motor; characterized in that The bean grinding assembly (2) has an upper conical blade assembly (202) disposed inside the conical blade adjustment disk (204); three columnar protrusions (221) disposed equidistantly on the outer diameter of the upper conical blade assembly are inserted into the guide groove track of the conical blade adjustment disk through the notches at three guide grooves (2041) on the inner wall of the conical blade adjustment disk; an arc-shaped protrusion is disposed on one side of the outer diameter of the bottom of the conical blade adjustment disk; a micro switch (4) is disposed on the grinder main body assembly (207) corresponding to the arc-shaped protrusion; and the conical blade adjustment disk is symmetrically disposed on both sides of the inner diameter of the bottom disk opening. The adjusting disk fixing plate (203) is limitedly sleeved on the top opening of the grinder main body component, and at the same time, the conical blade adjusting disk is inserted into the outer ring of the grinder main body component outside the lower conical blade groove, and the positioning column (2022) at the outer ring edge of the bottom protrusion of the adjusting disk fixing plate is inserted into the positioning groove (2071) in the inner annular groove of the outer ring of the outer grinder main body component; the conical blade adjusting disk of the bean grinding assembly is automatically monitored and finds the zero position through the stepping motor (208) when the machine is turned on, and the arc-shaped protrusion of the conical blade adjusting disk triggers the micro switch.

2. The coarse and fine grinding device of the fully automatic coffee machine according to claim 1, characterized in that The adjustment angle range between the outer diameter teeth of the cone cutter adjustment disk (204) is 85°, and the gear position changes by 3.4° each time the cone cutter adjustment disk is turned, with a total of 25 gear positions; the stepping motor (208) is connected to a circuit board of a control panel via a line, and the control panel is provided with a coarse and fine adjustment gear position button.

3. The coarse and fine grinding device of the fully automatic coffee machine according to claim 1, characterized in that The bottom annular ring surface of the cone blade adjustment disk (204) is provided with arc-shaped tooth openings (2042) arranged symmetrically in pairs, and a grinder main body component at the bottom of one side of the arc-shaped tooth opening is provided with a protruding ejector pin (213), the ejector pin abuts against the arc-shaped tooth opening at one side of the bottom of the cone blade adjustment disk, and the arc-shaped tooth opening is the coarseness and fineness adjustment stroke of the cone blade adjustment disk.

4. The coarse and fine grinding device of the fully automatic coffee machine according to claim 1, characterized in that The bean grinding motor is a horizontal motor (210); the outer diameter tooth opening of the cone blade adjustment disk (204) meshes with the transmission gear 1 (205); the transmission gear 1 meshes with the transmission gear 2 (206); the transmission gear 2 is connected to the motor shaft of the stepper motor (208) extending out of the grinder main body assembly (207); the stepper 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 cone blade (212) through a worm and a worm gear assembly; the worm gear assembly is a combination of upper and lower double-layer integrated large and small worm gears and cylindrical gears, and is arranged in the grinder main body assembly through the bottom cover of the grinder main body assembly; the transmission gear 2 of the grinder main body assembly is arranged at 90 degrees through the central axis of the transmission gear 1 and the cone blade adjustment disk, and the horizontal motor.

5. The coarse and fine grinding device of the fully automatic coffee machine according to claim 4, characterized in that The bottom of the shaft of the transmission gear one (205) is provided with symmetrically arranged hooks (2051), and the bottom of the shaft of the transmission gear one is fixed with the grinder main body assembly (207) via the hooks.

6. The coarse and fine grinding device of the fully automatic coffee machine according to claim 4, characterized in that The pins symmetrically arranged in pairs at the top of the powder sweeping gear (211) in the grinder main body assembly (207) are inserted into the bottom of the lower conical cutter (212), and the shaft of the gear at the bottom of the lower conical cutter is connected to the lower conical cutter through the powder sweeping gear. The powder sweeping gear is connected to the lower conical cutter and the gear at the bottom of the lower conical cutter as a whole.

7. The coarse and fine grinding device of the fully automatic coffee machine according to claim 1, characterized in that The powder sweeping gear (211) is arranged tangentially to the powder outlet channel (209), and the bottom of the powder sweeping cavity below the powder sweeping gear is arranged in a slope shape.

8. The coarse and fine grinding device of the fully automatic coffee machine according to claim 1, characterized in that The top opening portion of the bean lowering channel (201) extends out from the bottom side of the bean box assembly (1).

9. The coarse and fine grinding device of a fully automatic coffee machine according to claim 1, characterized in that The inner diameter ring surface of the top opening of the upper cone cutter assembly (202) is provided with a steel wire handle (2023) hingedly fixed to the upper cone cutter assembly.

10. The coarse and fine grinding device of a fully automatic coffee machine according to claim 1, characterized in that The bean box assembly (1) is fixed to the top of the grinder main body assembly (207) of the bean grinding assembly (2) via at least two bean lowering channel support frames (3) at the bottom, and the bean lowering channel support frames are C-shaped.

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