A coffee grinder with uniform distribution of powder

Abstract

The present application relates to a kind of coffee grinder of even powder distribution, it is to solve the technical problems of the powder channel of existing similar product being prone to blockage, powder distribution effect is poor, uneven and residual is generated, and the design of bean box placement in place detection trigger structure is complex.The key points are that the powder distribution fan blade is arranged in the powder outlet channel of the grinder assembly of the coffee grinder, the powder screen is arranged in the bottom channel opening of the powder outlet channel, the powder screen is fixed in the bottom channel opening of the powder outlet channel by the screw thread type inside and outside the powder outlet cover, the motor shaft of the powder distribution motor is connected with the powder distribution fan blade by extending into the powder outlet channel, the spiral blade of the powder distribution fan blade is provided with a notch on one side, the top channel opening of the powder outlet channel on one side of the grinder assembly or the exposed body;Two side inner walls of the inner bottom of the bean box tray are symmetrically provided with self-locking tongue assembly, at least one side of the outer diameter of the bean box tray is symmetrically provided with switch top rod assembly, and one side of the lower bean opening of the bean box tray and the knife opening sleeve of the grinder assembly is provided with another switch top rod assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to a coffee grinder with a bean box, and is a coffee grinder capable of uniformly distributing coffee powder. BACKGROUND

[0002] A coffee machine is an electrical device used for coffee making, which is generally divided into two types: semi-automatic and fully automatic. The semi-automatic coffee machine is a traditional Italian coffee machine, which grinds, presses, loads, brews, and manually removes residues according to manual operation. The fully automatic coffee machine realizes automatic control of the entire process of brewing coffee, such as preheating, cleaning, grinding, pressing, brewing, and powdering, according to scientific data and procedures to brew coffee. Moreover, it is equipped with a perfect protection system, which is convenient to use and can obtain coffee by simply pressing. Currently, in the powder grinding process of a common fully automatic coffee machine, the powder enters the brewing core, and due to the deviation of the design angle, the powder distribution is uneven, and there is residual powder in the powder channel, which causes insufficient brewing extraction and affects the taste of coffee. Therefore, some coffee machines are equipped with powder distribution structures, such as the application number 202211337262.8, application publication date 2023.01.10, and invention name "coffee powder distribution assembly, coffee powder distributor, and coffee machine" disclosed in Chinese patent documents. The above-mentioned powder distribution structure is mainly designed at the funnel, and is not arranged in the powder falling channel of the grinder. For example, the application number 202411325610.9, application publication date 2024.11.26, and invention name "coffee machine bean box bean falling grinding mechanism" disclosed in Chinese patent documents. The mechanism detects the placement of the bean box assembly into the bean box base assembly through a micro switch, but the bone position triggering method has poor stability and is prone to fracture and other risks. The production mold is complex and inconvenient to repair and replace. SUMMARY

[0003] To overcome the above-mentioned deficiencies, the purpose of the present application is to provide a coffee grinder capable of uniformly distributing coffee powder to the field, which solves the technical problems of the existing similar products, such as the easy clogging of the powder falling channel, poor powder distribution effect, uneven distribution, and residual powder, and the complex design of the bean box placement detection triggering structure. The purpose is achieved through the following technical solutions.

[0004] The application discloses a coffee grinder with uniform powder distribution, which comprises a bean box assembly and a grinding assembly, wherein the grinding assembly comprises a weighing assembly and a grinding knife assembly, the weighing assembly is used as a bean box base assembly, a lower bean outlet on the bottom of the weighing assembly is matched with a knife outlet on the top of the grinding knife assembly, a lower bean outlet in a disc groove on the top of the weighing assembly is aligned with a bean inlet of the bean box assembly, a motor shaft of a grinding motor of the grinding knife assembly is connected with a grinding knife head assembly in a grinding cavity, the weighing assembly and the grinding knife assembly are fixedly arranged on a machine body, a disc opening of a bean box tray on the top of the weighing assembly is exposed on the machine body, and a powder outlet channel communicated with the grinding cavity in the grinding knife assembly is arranged on one side of the grinding knife assembly. The structural design points of the grinder are that a powder distribution fan blade is arranged in the powder outlet channel of the grinding knife assembly, a powder screening net is arranged at the bottom of the powder outlet channel, the powder screening net is fixed to the bottom of the powder outlet channel through an inner and outer thread type fixing in a powder outlet cover, a motor shaft of a powder distribution motor is inserted into the powder outlet channel and connected with the powder distribution fan blade, and a top channel opening of the powder outlet channel on one side of the grinding knife assembly is exposed on the machine body. Therefore, the coffee powder ground by the grinder without the powder distribution mechanism in the existing coffee machine falls into a brewing cavity by tilting, is easily accumulated unevenly and affects the brewing taste. The coffee powder ground by the grinder with the powder distribution mechanism is uniformly distributed by the powder distribution mechanism and then uniformly enters the brewing cavity and is uniformly accumulated.

[0005] One side of a spiral blade of the powder distribution fan blade is provided with a notch, the notch is 50-60 degrees, and the height difference between the upper and lower ends of the spiral blade of the powder distribution fan blade is 6-7 mm. The above structure further improves the effects of anti-blocking, anti-residue and uniform powder distribution.

[0006] Two side inner walls of the inner bottom of the bean box tray are symmetrically provided with self-locking tongue assemblies, and at least one side of the outer diameter of the bean box tray is symmetrically provided with switch top rod assemblies; when the bean box assembly is placed into the disc groove on the top of the bean box tray, the convex points at the bone positions on the bottom of the bean box assembly trigger the micro switches of the switch top rod assemblies, and the muscle positions in the buckle grooves on the bottom of the bean box assembly are buckled and fixed to the self-locking tongues of the self-locking tongue assemblies. Therefore, the self-locking tongue assemblies are locked in place during the placement of the bean box assembly and press and trigger the micro switches through the switch top rod assemblies, and the program confirms that the bean box assembly is installed in place and enters the working state.

[0007] The self-locking tongue assembly comprises a tongue fixing cavity, a tongue spring and a bean box self-locking tongue. The bean box self-locking tongue in the tongue fixing cavity is stretched out of the side hole of the tongue fixing cavity and the hole of the convex position on one side of the inner wall of the disc groove on the top of the bean box tray through the abutting part of the tongue spring in the tongue fixing cavity, and the side hole of the tongue fixing cavity is buckled and fixed to the recess on the outside of the convex position of the bean box tray. When the bean box assembly is placed into the disc groove on the top of the bean box tray, the muscle positions in the buckle grooves on the bottom of the bean box assembly are buckled and fixed to the self-locking tongues in the tongue fixing cavity of the self-locking tongue assembly and the disc groove on the top of the bean box tray.

[0008] The switch top rod assembly respectively comprises a switch top rod, a top rod spring, a pan head screw, a micro switch, a top rod support and a support screw. The micro switch is fixed in a switch slot on one side of the outer diameter of the bean box tray through the pan head screw. The moving spring sheet on one side of the micro switch extends out of the switch slot and is aligned with the contact point at one end of the switch top rod. The convex part on the other side of the contact head is inserted into the edge groove with a convex inner wall on the top of the disc groove of the bean box tray. The other end of the switch top rod is sleeved into the top rod support with a top rod spring on the outer diameter. The top rod support is arranged on the outer diameter of the bean box tray on one side of the micro switch through the support screw. When the bean box assembly is placed in the disc groove on the top of the bean box tray, the convex point at the bone position on the bottom of the bean box assembly presses the convex part of the switch top rod. The switch top rod moves down to press the moving spring sheet of the micro switch, triggering the micro switch of the switch top rod assembly.

[0009] The lower bean opening at the bottom convex part of the bean box tray is sleeved with the knife opening at the top convex part of the knife grinding assembly. Another switch top rod assembly is arranged on one side of the bottom of the bean box tray or the outer diameter of the knife grinding assembly.

[0010] The rear powder outlet channel cover at the powder outlet channel on one side of the knife grinding assembly is integrally formed with the outer shell of the knife grinding assembly. The front powder outlet channel cover is fixedly buckled at the opening of the rear powder outlet channel cover. The above structure facilitates the assembly and maintenance of the powder distribution fan blade and the powder distribution motor.

[0011] The bottom of the bean box tray is provided with a motor support fixing plate. A lower bean gear motor is arranged at the bottom of the motor support fixing plate. The motor shaft of the lower bean gear motor is connected with a transmission gear through the motor support fixing plate. The transmission gear is connected with the gear hole of the lower bean gear exposed at the bottom of the bean box assembly placed in the disc groove on the top of the bean box tray through the bean box tray. The lower bean gear motor is arranged at the bottom of the motor support fixing plate through a motor support.

[0012] One side of the bottom of the motor support fixing plate is provided with a weighing module. The weighing module comprises a weighing sensor and a weighing module fixing seat. The weighing sensor is attached to the bottom of the motor support fixing plate through a sensor bridge arm. The weighing sensor of the weighing module is limited in the weighing fixing seat with a gap and can swing up and down and left and right. The weighing module is arranged at the bottom of the motor support of the motor support fixing plate.

[0013] The other side of the bottom of the motor support fixing plate is provided with an adjusting disc motor. The motor shaft of the adjusting disc motor is engaged with the cutter disc adjusting gear on the outer diameter of the grinding cutter head assembly through an adjusting gear. The rotation of the cutter disc adjusting gear drives the rotation of the inner cutter sleeve of the grinding cutter head assembly. The gap between the inner cutter sleeve of the grinding cutter head assembly and the inner static cutter head of the grinding cutter head assembly changes. The adjusting disc motor is fixedly arranged on one side of the motor support of the motor support fixing plate or the outer shell of the knife grinding assembly.

[0014] The present application has reasonable structure design, convenient production and assembly, convenient disassembly, easy cleaning, good stability, long service life, especially uniform powder distribution in the powder outlet channel, no residue, easy to put in the bean box assembly, accurate detection, firm placement, and is suitable for use as a coffee grinder with uniform powder distribution, and structural improvement of similar products. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective structural schematic diagram of the present application.

[0016] Figure 2 is Figure 1 the exploded structural schematic diagram of the knife grinding assembly.

[0017] Figure 3 is Figure 1 the exploded structural schematic diagram of the weighing assembly.

[0018] Figure 4 is Figure 1 the cross-sectional structural schematic diagram of the self-locking tongue assembly, and the A part is framed, and the dashed line represents the overall machine outline.

[0019] Figure 5 is Figure 4 the enlarged view of the A part.

[0020] Figure 6 is Figure 1 the cross-sectional structural schematic diagram of the switch top rod assembly, and the B part is framed.

[0021] Figure 7 is Figure 6 the enlarged view of the B part.

[0022] Figure 8 is Figure 1 the bottom perspective structural schematic diagram.

[0023] Figure 9 is Figure 8 the partial internal structural schematic diagram, wherein the bottom cover of the gear box at the grinding motor is omitted, and the motor support fixed sheet bottom motor support is omitted.

[0024] Figure 10 is Figure 1 the internal structural schematic diagram of the bean box assembly after the bean box tray is removed.

[0025] Figure 11 is Figure 1 the bottom structural schematic diagram of the three main assemblies in the exploded state.

[0026] Figure 12 is Figure 1 the enlarged structural schematic diagram of the powder distribution fan blade.

[0027] Figure 13 is a top view structural schematic diagram of Figure 12 .

[0028] Figure 14 is a side view structural schematic diagram of the notch of Figure 12 .

[0029] Figure No. and Name: 1, bean box assembly, 2, bean grinding assembly, 3, cloth powder motor, 4, rear powder outlet channel cover, 5, front powder outlet channel cover, 6, cloth powder fan blade, 601, notch, 7, powder screening net, 8, powder outlet cover, 9, cloth powder motor fixing screw, 10, left tongue fixing cavity, 11, left tongue spring, 12, left bean box self-locking tongue, 13, right bean box self-locking tongue, 14, right tongue spring, 15, right tongue fixing cavity, 16, left micro switch top rod, 17, left top rod spring, 18, left head screw, 19, left micro switch, 20, right top rod spring, 21, right head screw, 22, right micro switch top rod, 23, right micro switch, 24, left support screw, 25, left top rod support, 26, right support screw, 27, right top rod support, 28, weighing assembly, 29, bean box tray, 30, transmission gear, 31, motor support fixing sheet, 32, weighing module, 33, grinding motor, 34, adjusting disc motor, 35, adjusting gear, 36, lower bean gear motor, 37, cutter disc adjusting gear. Embodiment

[0030] The structure and use of the present application will be further described in conjunction with the drawings. As shown in Figures 1-14As shown, the coffee grinder comprises a bean box assembly 1 and a grinding assembly 2, the grinding assembly comprises a weighing assembly 28 and a grinding blade assembly, the weighing assembly serves as a bean box base assembly, the protruding lower bean outlet at the bottom of the weighing assembly is fitted into the protruding blade opening at the top of the grinding blade assembly, the lower bean outlet in the top disc slot of the bean box tray 29 of the weighing assembly is aligned with the bean inlet of the bean box assembly, the motor shaft of the grinding motor 33 of the grinding blade assembly is connected with the grinding blade head assembly in the grinding cavity, the weighing assembly and the grinding blade assembly are fixedly arranged on the machine body, the disc opening at the top of the bean box tray of the weighing assembly is exposed on the machine body, and the grinding blade assembly is provided with a powder outlet channel communicated with the grinding cavity in the grinding blade assembly. A powder distribution fan blade 6 is arranged in the powder outlet channel of the grinding blade assembly, a powder screening net 7 is arranged at the bottom channel opening of the powder outlet channel, the powder screening net is fixedly arranged at the bottom channel opening of the powder outlet channel through the internal and external threaded type of the powder outlet cover 8, the motor shaft of the powder distribution motor 3 extends into the powder outlet channel and is connected with the powder distribution fan blade, and the powder distribution motor is fixedly arranged at the housing of the grinding blade assembly of the grinding blade assembly through the powder distribution motor fixing screw 9 or buckle. The top channel opening of the powder outlet channel at one side of the grinding blade assembly is exposed on the machine body or flush with the disc opening of the bean box tray and exposed on the machine body. One side of the spiral blade of the powder distribution fan blade is provided with a notch 601, the notch is 52.43°, and the height difference between the upper and lower ends of the spiral blade of the powder distribution fan blade is 6.52 mm. The rear powder outlet cover 4 at the powder outlet channel of one side of the grinding blade assembly is integrally formed with the housing of the grinding blade assembly, and the front powder outlet cover 5 is buckled and fixed at the opening of the rear powder outlet cover.

[0031] The two side inner walls of the inner bottom of the bean box tray are symmetrically provided with a self-locking tongue assembly, and at least one side of the outer diameter of the bean box tray is symmetrically provided with a switch top rod assembly; when the bean box assembly is placed into the top disc groove of the bean box tray, the protrusions at the bone positions of the bottom of the bean box assembly trigger the micro switch of the switch top rod assembly, and the inner rib of the bottom groove of the bean box assembly is buckled and fixed to the self-locking tongue of the self-locking tongue assembly. Specifically, the self-locking tongue assembly comprises a tongue fixed cavity, a tongue spring and a bean box self-locking tongue, the bean box self-locking tongue in the tongue fixed cavity is stretched out from the side hole of the tongue fixed cavity through the abutting part of the tongue spring in the tongue fixed cavity, and the hole in the protrusion position on one side of the inner wall of the top disc groove of the bean box tray, and the side hole of the tongue fixed cavity is buckled and fixed to the protrusion position outside the groove of the bean box tray; when the bean box assembly is placed into the top disc groove of the bean box tray, the inner rib of the bottom groove of the bean box assembly is buckled and fixed to the self-locking tongue assembly which is stretched out from the tongue fixed cavity, and the self-locking tongue of the inner wall of the top disc groove of the bean box tray. The switch top rod assembly comprises a switch top rod, a top rod spring, a disc head screw, a micro switch, a top rod support and a support screw, the micro switch is fixed in the switch groove on one side of the outer diameter of the bean box tray through the disc head screw, the moving contact on one side of the micro switch is stretched out from the switch groove and aligned with the contact on one end of the switch top rod, the convex part on the other side of the contact is inserted into the edge groove with a convex part on the top and an opening on the inner wall of the top disc groove of the bean box tray, the other end of the switch top rod is sleeved into the top rod support with a top rod spring outside the outer diameter, and the top rod support is arranged on the outer diameter of the bean box tray on one side of the micro switch through the support screw; when the bean box assembly is placed into the top disc groove of the bean box tray, the protrusions at the bone positions of the bottom of the bean box assembly press down the convex part of the switch top rod, the switch top rod moves down to press down the moving contact of the micro switch, and the micro switch of the switch top rod assembly is triggered.

[0032] The left self-locking tongue assembly comprises a left tongue fixed cavity 10, a left tongue spring 11 and a left bean box self-locking tongue 12, the right self-locking tongue assembly comprises a right bean box self-locking tongue 13, a right tongue spring 14 and a right tongue fixed cavity 15, the left switch top rod assembly comprises a left micro switch top rod 16, a left top rod spring 17, a left disc head screw 18, a left micro switch 19, a left support screw 24 and a left top rod support 25, and the right switch top rod assembly comprises a right top rod spring 20, a right disc head screw 21, a right micro switch top rod 22, a right micro switch 23, a right support screw 26 and a right top rod support 27. The bottom protrusion of the bean box tray of the weighing assembly is provided with another switch top rod assembly on one side of the bottom of the bean box tray or on one side of the outer diameter of the knife grinding assembly.

[0033] The bottom of the above-mentioned bean box tray is provided with a motor support fixing sheet 31, the bottom of the motor support fixing sheet is provided with a lower bean gear motor 36, the motor shaft of the lower bean gear motor is connected with a transmission gear 30 through the motor support fixing sheet, the transmission gear is connected with the lower bean gear exposed at the bottom of the bean box assembly placed in the top disc groove of the bean box tray through the bean box tray, the lower bean gear motor is arranged at the bottom of the motor support fixing sheet through a motor support base. The bottom of the motor support fixing sheet is provided with a weighing module 32 on one side, the weighing module comprises a weighing sensor and a weighing module fixing base, the weighing support sheet of the weighing sensor is attached to the bottom of the motor support fixing sheet through a sensor bridge arm, the weighing sensor of the weighing module is limited in the weighing fixing base and is provided with a gap and swings up and down, the weighing module is arranged at the bottom of the motor support fixing base of the motor support base. The bottom of the motor support fixing sheet is provided with an adjusting disc motor 34 on the other side, the motor shaft of the adjusting disc motor is engaged with a cutter disc adjusting gear 37 of the outer diameter of the grinding cutter head assembly through an adjusting gear 35, the rotation of the cutter disc adjusting gear drives the inner cutter sleeve of the grinding cutter head assembly to rotate, the gap between the inner cutter sleeve of the grinding cutter head assembly and the inner cutter head of the grinding cutter head assembly changes, and the adjusting disc motor is fixedly arranged on one side of the shell of the cutter assembly.

[0034] The specific implementation of the coffee grinder is as follows: first, the bean box assembly is filled with coffee beans, then the bean box assembly filled with coffee beans is placed in the weighing assembly, the convex point below the bean box assembly presses the right micro switch top rod of the weighing assembly to trigger the working mode during the placing process, at the same time, the bean box assembly extrudes the two self-locking tongues inside the weighing assembly during the placing process, the self-locking tongues move linearly outward, when the concave groove area below the bean box assembly is contacted, the self-locking tongues disappear under the pressure, and rebound to the original position under the rebound force of the tongue spring, so that the bean box assembly is locked; the process of taking out the bean box assembly is the same as the above. Then, after the bean box assembly and the weighing assembly are locked to trigger the micro switch, the lower bean grinding starts, the coffee powder ground out enters the powder outlet channel, and the cloth powder motor inside the powder outlet channel drives the cloth powder fan blade to rotate during the powder outlet process, the coffee powder falls into the lower part uniformly in the gap of the cloth powder fan blade, and then falls into the brewing cavity uniformly through the powder screening net.

[0035] In summary, the coffee grinder is a uniform powder distribution grinder system, specifically a coffee machine working mechanism capable of uniformly distributing powder in a fully automatic coffee machine. The coffee grinder installs cloth powder fan blades and a screen at the powder outlet through a powder outlet cover to solve the problem of uneven powder distribution, and the powder outlet cover is designed to be threadedly detached, which facilitates the removal of the fan blades and the screen inside for cleaning; the powder outlet channel is fixed in a snap-fit manner by a rear powder outlet channel cover and a front powder outlet channel cover, which facilitates the assembly and disassembly of corresponding parts for production.

Claims

1. A coffee grinder for uniform distribution of powder, the coffee grinder comprising a bean box assembly (1) and a grinding assembly (2), the grinding assembly comprising a weighing assembly (28) and a grinding blade assembly, the weighing assembly serving as a bean box base assembly, a lower bean opening on a bottom protrusion of the weighing assembly being fitted into a blade opening on a top protrusion of the grinding blade assembly, a bean box tray (29) of the weighing assembly being aligned with a bean inlet opening of the bean box assembly in a top tray slot of the bean box tray, a motor shaft of a grinding motor (33) of the grinding blade assembly being connected to a grinding blade head assembly in a grinding cavity, the weighing assembly and the grinding blade assembly being fixedly arranged in a machine body, a tray opening of the bean box tray on a top of the weighing assembly being exposed to the machine body, and the grinding blade assembly being provided with a powder outlet channel in communication with the grinding cavity in the grinding blade assembly; characterized in that The powder distribution fan blade (6) is arranged in the powder outlet channel of the knife grinding assembly, the bottom channel opening of the powder outlet channel is provided with a powder screening net (7), the powder screening net is fixed to the bottom channel opening of the powder outlet channel through the inner and outer threaded type of the powder outlet cover (8), the motor shaft of the powder distribution motor (3) extends into the powder outlet channel and is connected with the powder distribution fan blade; the top channel opening of the powder outlet channel on one side of the knife grinding assembly or the exposed machine body; one side of the spiral blade of the powder distribution fan blade (6) is provided with a notch (601), the notch is 50°-60°, and the height difference between the upper and lower ends of the spiral blade of the powder distribution fan blade is 6mm-7mm.

2. The uniform-dosing coffee grinder for a coffee maker according to claim 1, characterized in that The inner walls on both sides of the inner bottom of the bean box tray (29) are symmetrically provided with a self-locking tongue assembly, and at least one side of the outer diameter of the bean box tray is symmetrically provided with a switch top rod assembly; when the bean box assembly (1) is placed into the top disc groove of the bean box tray, the convex point at the bone position of the bottom of the bean box assembly triggers the micro switch of the switch top rod assembly, and the muscle position limiting buckle at the bottom of the bean box assembly is buckled and fixed to the self-locking tongue of the self-locking tongue assembly.

3. The uniform-dosing coffee grinder for a coffee maker according to claim 2, characterized in that The self-locking tongue assembly comprises a tongue fixing cavity, a tongue spring and a bean box self-locking tongue, the bean box self-locking tongue in the tongue fixing cavity extends out of the side opening of the tongue fixing cavity through the abutting part of the tongue spring in the tongue fixing cavity, and the side opening of the tongue fixing cavity is buckled and fixed to the convex position of the outer side groove of the bean box tray; when the bean box assembly (1) is placed into the top disc groove of the bean box tray, the muscle position limiting buckle at the bottom of the bean box assembly is buckled and fixed to the self-locking tongue extending out of the tongue fixing cavity and the self-locking tongue of the inner wall of the top disc groove of the bean box tray.

4. The uniform-dosing coffee grinder of claim 2, wherein The switch top rod assembly comprises a switch top rod, a top rod spring, a disc head screw, a micro switch, a top rod support and a support screw, the micro switch is fixed in the switch groove on one side of the outer diameter of the bean box tray through the disc head screw, the moving contact on one side of the micro switch extends out of the switch groove and is aligned with the contact point at one end of the switch top rod, the convex part at the other end of the contact is inserted into the edge groove with the convex part on the top opening of the inner wall of the top disc groove of the bean box tray, the other end of the switch top rod is sleeved into the top rod support and is provided with the top rod spring on the outer diameter, and the top rod support is arranged on the outer diameter of the bean box tray on one side of the micro switch through the support screw; when the bean box assembly (1) is placed into the top disc groove of the bean box tray, the convex point at the bone position of the bottom of the bean box assembly presses down the convex part of the switch top rod, the switch top rod moves down to press down the moving contact of the micro switch, and the micro switch of the switch top rod assembly is triggered.

5. The uniform-dosing coffee grinder of claim 4, wherein The bottom convex part of the bean box tray (29) is provided with another switch top rod assembly on one side of the bottom or the outer diameter of the knife grinding assembly.

6. The uniform-dosing coffee grinder for a coffee maker according to claim 1, wherein The rear powder outlet cover (4) of the powder outlet channel on one side of the knife grinding assembly is integrally formed with the shell of the knife grinding assembly, and the front powder outlet cover (5) is buckled and fixed to the opening of the rear powder outlet cover.

7. The uniform-dosing coffee grinder for a coffee maker according to claim 1, wherein The bottom of the bean box tray (29) is provided with a motor support fixing plate (31), the bottom of the motor support fixing plate is provided with a lower bean gear motor (36), the motor shaft of the lower bean gear motor is connected with a transmission gear (30) through the motor support fixing plate, the transmission gear is connected with the lower bean gear exposed at the bottom of the bean box assembly through the bean box tray and the gear hole of the bean box group placed in the top disc groove of the bean box tray, and the lower bean gear motor is arranged at the bottom of the motor support fixing plate through a motor support.

8. The uniform-dosing coffee grinder for a coffee maker according to claim 7, characterized in that The bottom of the motor support fixing plate (31) is provided with a weighing module (32) on one side, the weighing module comprises a weighing sensor and a weighing module fixing seat, the weighing support piece of the weighing sensor is attached to the bottom of the motor support fixing plate through a sensor bridge arm, the weighing sensor of the weighing module is limited in the weighing fixing seat and is provided with a gap and swings up and down, and the weighing module is arranged at the bottom of the motor support fixing plate.

9. The uniform-dosing coffee grinder of claim 7, wherein The bottom of the motor support fixing plate (31) is provided with an adjusting disc motor (34) on the other side, the motor shaft of the adjusting disc motor is engaged with a cutter disc adjusting gear (37) on the outer diameter of the grinding cutter head assembly through an adjusting gear (35), the cutter disc adjusting gear rotates to drive the inner moving cutter sleeve of the grinding cutter head assembly to rotate, the gap between the inner moving cutter sleeve of the grinding cutter head assembly and the inner static cutter head of the grinding cutter head assembly changes, and the adjusting disc motor is fixedly arranged on one side of the motor support fixing plate or the shell of the cutter assembly.

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