Coffee bean grinding machine and coffee bean grinding device

Abstract

The present invention relates to a coffee bean grinding machine and a coffee bean grinding device thereof, which is designed to solve the technical problems that the bean box loading and unloading structure and the grinding coarseness adjustment structure of the existing similar products are poorly designed, resulting in a relatively complex overall structure, high cost and greater assembly difficulty. The coffee bean grinding device comprises a top cover assembly, a bean box assembly and a coffee bean grinding assembly. The box body of the bean box assembly is square, the bottom of the square box body corresponds to the box cover groove at the top of the top cover assembly, and the outer slider of the cover opening at the bottom cover of the bean box assembly is a locking slider; the key points are that a fixing ring is provided at the bottom of the box cover hole of the top cover assembly, an upper gear ring is provided at the bottom outer diameter of the fixing ring, the outer diameter of the adjustment ring is meshed with the adjustment ring gear of the adjustment gear assembly, the inner and outer cone cutters of the cone cutter bracket are meshed with the outer cone cutter in the middle through the bottom inclined surface, the bottom of the box body of the bean box assembly is placed in the top of the top cover assembly, and the bean box assembly can be locked and the grinding coarseness gear can be adjusted by rotating the knob on one side of the top of the top cover assembly.

Description

Technical Field

[0001] The invention relates to a coffee machine and a bean grinding device thereof, in particular to a bean grinding coffee machine and a bean grinding device thereof. Background Art

[0002] Coffee machine is an electrical device used for making coffee. It is generally divided into semi-automatic and fully automatic. The semi-automatic coffee machine is a traditional Italian coffee machine. It is operated manually for grinding, pressing, loading, brewing, and manually removing residues. Some machines are also equipped with electronic water volume control, which can accurately and automatically control the amount of water for brewing coffee. Fully automatic coffee machines realize automatic control of the entire process of brewing coffee, including preheating, cleaning, grinding, pressing, brewing, and draining. They brew coffee according to scientific data and procedures, and are equipped with a complete protection system. They are convenient to use and can get coffee with just a light press. Among them, the grinding mechanism of the coffee machine is a grinding tool that cuts and grinds coffee beans into coffee powder when the motor drives the mechanical cutter to rotate rapidly. Existing bean grinding coffee machines or drip coffee machines, such as the application number 201120210234.0 disclosed in the Chinese patent literature, the authorization announcement date 2012.03.21, and the utility model name "drip coffee machine with bean grinding device"; another example is the application number 202022275339.6 disclosed in the Chinese patent literature, the authorization announcement date 2021.06.25, and the utility model name "grinding bean coffee machine". However, the grinding mechanisms currently on the market are of the following types: one is that the bean box does not have a bean sealing structure, and the bean box can only be removed from the coffee machine after the coffee beans are used up, otherwise the coffee beans will fall, and the coffee machine cannot be cleaned more conveniently; the second type is that the bean box is fixed to the machine, cannot be removed independently, cannot be disassembled, and cannot clean the grinding head, resulting in long-term blockage of powder and damage to the machine; especially as a square bean box, it cannot be rotated and fixed or requires a complex structure to achieve bean box fixation. In addition, the grinding coarseness adjustment of the existing coffee machine is completed by a separate structure, which makes the overall structure of the coffee machine more complicated, the cost is higher, and the assembly is more difficult. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a coffee bean grinding machine and a coffee bean grinding device in the art, so as to solve the technical problems that the bean box loading and unloading structure and the grinding coarseness adjustment structure of the existing similar products are poorly designed, resulting in a relatively complex overall structure, high cost, and greater assembly difficulty. The purpose is achieved through the following technical solutions.

[0004] A bean grinding device for a bean grinding coffee machine, the bean grinding device comprising a top cover assembly, a bean box assembly and a bean grinding assembly, the bean grinding assembly being arranged at the bottom of a box cover hole of the top cover assembly via a bean grinding bracket, a cutter head in a powder making chamber at the top of the bean grinding assembly being connected to a motor shaft of a motor at the bean grinding bracket via a gear reduction box, the powder making chamber of the bean grinding assembly being communicated with a powder outlet channel of the bean grinding bracket, and the bean box assembly being arranged at the top of the box cover hole of the top cover assembly. The key points of its structural design are that a fixing ring is provided at the bottom of the box cover hole of the top cover assembly, an upper gear ring is provided at the bottom outer diameter of the fixing ring, the top ring mouth of the fixing ring is inserted into the box cover hole of the top cover assembly, and a lock box groove is provided at the inner diameter of the ring mouth of the fixing ring; an adjusting gear assembly is provided on one side of the bottom of the top cover assembly where the top cover assembly is connected to the grinding bean assembly, and the gear shaft rod at the lock adjustment gear of the adjusting gear assembly is sleeved with the knob shaft rod at the bottom of the knob on one side of the top cover assembly, and the outer diameter of the lock adjustment gear of the adjusting gear assembly is meshed with the first transmission gear on one side of the adjusting gear assembly at the same time, the other side of the first transmission gear is meshed with the upper gear ring on the outer diameter of the fixing ring, one side of the second transmission gear below the same gear shaft of the first transmission gear is meshed with the lower gear ring on the outer diameter of the adjustment ring in the grinding bean bracket, and the other side of the second transmission gear is meshed with the adjustment circle gear below the same gear shaft of the lock adjustment gear, the adjustment circle gear, the lock adjustment gear, and the gear shaft rod are connected as a whole, one side of the outer diameter of the lock adjustment gear is provided with a tooth opening, and the other side is symmetrically provided with an arc edge; the cutter head of the grinding bean assembly is an inner cone The bean grinding assembly is provided with a conical knife bracket in the adjusting circle, and an outer conical knife is provided in the conical knife bracket. The outer diameter of the adjusting circle is meshed with the adjusting circle gear of the adjusting gear assembly, and the adjusting circle is connected with the outer thread of the outer diameter of the conical knife bracket through the inner thread of the inner diameter, and the conical knife bracket is limited to the adjusting circle, and the powder making chamber of the bean grinding assembly is the inner cavity between the inner and outer conical knives of the conical knife bracket and the inner conical knife; at least two outer sliders of the cover opening at the bottom cover of the bean box assembly are inserted into the lock box groove at the fixing ring of the top cover assembly, and the knob is turned. The tooth opening on one side of the lock adjustment gear of the adjusting gear assembly drives the fixing ring to rotate through the first transmission gear, and the lock box groove of the fixing ring locks the outer slider of the cover opening of the bottom cover of the bean box. At this time, the knob is continued to be turned until the arc edge on the other side of the lock adjustment gear is disengaged from the first transmission gear. In the above process, the lock adjustment gear drives the adjusting circle of the bean grinding assembly to rotate through the adjusting circle gear, drives the conical knife bracket in the adjusting circle to rotate, and the adjusting circle drives the inner and outer conical knives of the conical knife bracket to rotate, and moves up and down to adjust the gap between the outer diameter of the outer conical knife and the inner diameter of the inner conical knife to adjust the coarseness and fineness of the powder grinding. The above is an embodiment of a single-knob integrated structure, in which the bean box assembly is easy to assemble and disassemble. The knob controls the lock of the bean box assembly and the adjustment mechanism of the coarse and fine grinding positions. The bean box assembly, the adjustment gear assembly, and the bean grinding assembly are combined into one, and are applied to the corresponding bean grinding coffee machine; at the same time, the bean box locking assembly on the top of the existing coffee machine product is hidden in the machine body, and the double sealing ring mode is used to make the entire system more reliable in bearing pressure.After the knob is rotated 60 degrees, the grinding coarseness and fineness gear adjustment is entered. Since the teeth of the lock adjustment gear are disengaged at this time, when the knob is mechanically rotated again, only the adjustment ring gear under the lock adjustment gear will drive the adjustment cone to move up and down.

[0005] The adjusting gear assembly omits the locking adjusting gear and the first transmission gear, omits the upper gear ring at the fixing ring of the top cover assembly, and the bean box assembly locks the outer slider of the bean box bottom cover into the locking box groove of the fixing ring by rotating. The above is an embodiment of omitting the knob to lock the bean box assembly structure.

[0006] The lock adjustment gear and the first transmission gear in the adjustment gear assembly are arranged on the bean box knob assembly, and the bean box knob of the top cover assembly is meshed with the upper gear ring of the fixing ring through the lock adjustment gear and the first transmission gear of the bean box knob assembly. The above is an embodiment of the double knob split structure.

[0007] The adjusting gear assembly omits the adjusting ring gear and the second transmission gear, and the grinding bean support of the grinding bean assembly omits the adjusting ring. The above is an embodiment of the adjusting mechanism omits the grinding coarseness and fineness gear.

[0008] An upper positioning piece is provided in the knob shaft at the bottom of the knob of the top cover assembly, and the slot of the knob shaft hole at the bottom of the knob is fitted with the convex rib of the lock adjustment gear. The upper positioning piece of the knob is inserted into the lower positioning gap symmetrically on both sides of the gear shaft of the lock adjustment gear, and the two sides of the lower positioning gap are symmetrically 60 degrees fan-shaped driving gap angle. Therefore, the knob can be driven to rotate only after it is rotated 60 degrees. The slot of the knob cooperates with the convex rib of the lock adjustment gear to drive the rotation. When the knob rotates clockwise within the 60-degree angle range from the start to the end, the knob drives the lock adjustment gear and the first transmission gear to be consistent, and drives the fixed ring to rotate.

[0009] The bean box assembly has a square body, the bottom of the square body corresponds to the box cover groove at the top of the top cover assembly, the box cover hole is arranged in the box cover groove, the box cover groove and the box body are square, and the bottom of the box body fits with the groove of the box cover groove. The above structure facilitates the box body of the bean box assembly to be put into the top cover assembly and locked by the above knob, which has a good dustproof effect and is convenient to install.

[0010] The outer slider of the bean box bottom cover of the bean box assembly is a locking slider, and the lock head at one end of the locking slider extends out of the bean box bottom cover through the locking spring at the rear, and the locking head of the locking slider is provided with a chamfered inclined surface, and the guide port at one end of the lock box slot at the fixing ring of the top cover assembly is provided with a barb, and the other end of the lock box slot is provided with a limiting groove. The above structure facilitates the bean box assembly to be further fixed to the top cover assembly through the bottom cover assembly.

[0011] A protruding positioning column is provided on one side of the bean box bottom cover at the locking slider of the bean box assembly, and the positioning column corresponds to the opening groove on one side of the box cover hole of the top cover assembly, and the inner diameter of the bean box bottom cover is provided with three equally spaced triangular bean bin doors. When the bean box assembly is installed in the top cover assembly, the positioning column of the bean box bottom cover is aligned with the opening groove of the fixing ring, so that the first transmission gear drives the fixing ring when rotating, and drives the bean box bottom cover to rotate and open the bean box assembly, thereby removing the bean bin door; the bean bin door is sealed, and the bean bin door is opened after the bean box bottom cover is rotated 60 degrees, and the coffee beans fall into the powder making bin.

[0012] The inner conical cutter of the bean grinding assembly is reduced from the bottom to the top to form a cone shape, the inner conical cutter is fixed to the oblique inner groove of the inner and outer conical cutters of the conical cutter bracket through the oblique wedge head buckle on the outer diameter of the bottom, the top plane of the inner conical cutter is fixed to the cutter head shaft of the gear reduction box through a nut, the outer diameter of the inner conical cutter is provided with an arc-shaped spiral cutter head and a spiral side groove, the outer diameter above the oblique wedge head of the inner conical cutter is provided with an oblique gear ring, the oblique gear ring of the inner conical cutter is meshed with the oblique tooth groove in the outer conical cutter, and a bearing is provided at the bottom of the inner conical cutter.

[0013] A travel switch is provided on one side of the fixing ring at the bottom of the top cover assembly, and a trigger rod is provided on one side of the travel switch of the fixing ring. When the arc edge on the other side of the first gear at the lock adjusting gear of the adjusting gear assembly is disengaged from the transmission gear, the trigger rod of the fixing ring abuts against the travel switch. The above facilitates further confirmation that the bean box assembly is locked in place and relevant functions are activated, thereby ensuring its safety in use.

[0014] The top cover assembly is arranged on the top of the machine body, and the powder outlet channel at the bean grinding support of the bean grinding assembly is connected with the funnel in the coffee cavity assembly, so that coffee can be brewed automatically by operating the handle or pressing a button.

[0015] The invention has reasonable structural design, wide application range, convenient disassembly and assembly of the bean box assembly, convenient adjustment of the grinding coarseness, and low production cost; it is suitable for use as a bean grinding coffee machine and its bean grinding device, as well as improvements on the bean box loading and unloading structure and the grinding coarseness adjustment structure of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a partial exploded structure of the present invention, in which the dotted line is the internal structure of the adjusting gear assembly, and the framed part is a schematic diagram of the bottom structure of the knob.

[0017] Figure 2 yes Figure 1 Schematic diagram of the bottom explosion structure.

[0018] Figure 3 yes Figure 1 Schematic diagram of further explosion structure.

[0019] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional structure.

[0020] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure.

[0021] Figure 6 yes Figure 4 Schematic diagram of the bottom structure.

[0022] Figure 7 yes Figure 1 Schematic diagram of the bottom structure of the top cover assembly.

[0023] Figure 8 yes Figure 4 The working principle structure diagram of the fixing ring of the bean box assembly and the cover plate of the top cover assembly are omitted in the figure.

[0024] Serial number and name of the accompanying drawings: 1. Top cover assembly, 101. Box cover groove, 102. Box cover hole, 103. Knob, 1031. Upper positioning piece, 104. Fixed ring, 2. Bean box assembly, 201. Bean box bottom cover, 2011. Positioning column, 2012. Bean bin door, 202. Lock slider, 203. Lock spring, 204. Press plate, 3. Grinding bean assembly, 301. Adjustment ring, 302. Grinding bean bracket powder outlet channel, 303. Motor, 304. Inner cone knife, 305. Cone knife bracket, 306. Cone knife fixing bracket, 4. Adjustment gear assembly, 401. Lock adjustment gear, 4011. Lower positioning gap, 4012. Convex rib, 402. First transmission gear, 403. Adjustment ring gear, 5. Travel switch. DETAILED DESCRIPTION

[0025] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 7As shown, the bean grinding device includes a top cover assembly 1, a bean box assembly 2 and a bean grinding assembly 3. The bean grinding assembly is arranged at the bottom of the box cover hole 102 of the top cover assembly through the bean grinding bracket 302. A pressing plate 204 is provided in the annular groove at the connection. The cutter head in the powder making chamber at the top of the bean grinding assembly is connected to the motor shaft of the motor 303 at the bean grinding bracket through a gear reduction box. The powder making chamber of the bean grinding assembly is communicated with the powder outlet channel of the bean grinding bracket. The bean box assembly is arranged at the top of the box cover hole of the top cover assembly. The specific structure is as follows: a fixing ring 104 is provided at the bottom of the box cover hole of the top cover assembly, an upper gear ring is provided at the outer diameter of the bottom of the fixing ring, the top ring opening of the fixing ring is inserted into the box cover hole of the top cover assembly, and a locking box groove is provided at the inner diameter of the ring opening of the fixing ring; an adjusting gear assembly 4 is provided at one side of the bottom of the top cover assembly where the top cover assembly is connected to the grinding bean assembly, a gear shaft rod at the lock adjusting gear 401 of the adjusting gear assembly is sleeved with a knob shaft rod at the bottom of the knob 103 on one side of the top cover assembly, and the outer diameter of the lock adjusting gear of the adjusting gear assembly is aligned with the inner diameter of the adjusting gear assembly on one side. When the first transmission gear 402 is meshed, the other side of the first transmission gear is meshed with the upper gear ring on the outer diameter of the fixing ring, one side of the second transmission gear below the same gear shaft of the first transmission gear is meshed with the lower gear ring on the outer diameter of the inner adjustment ring 301 of the grinding bean bracket 302, and the other side of the second transmission gear is meshed with the adjustment ring gear 403 below the same gear shaft of the lock adjustment gear. The adjustment ring gear, the lock adjustment gear, and the gear shaft are connected as a whole. One side of the outer diameter of the lock adjustment gear is provided with a tooth opening, and the other side is symmetrically provided with an arc edge; Grinding bean assembly The cutter head is an inner cone cutter 304, a cone cutter bracket 305 is provided in the adjusting circle of the bean grinding assembly, an outer cone cutter is provided in the cone cutter bracket, the outer diameter of the adjusting circle is meshed with the adjusting circle gear of the adjusting gear assembly, the adjusting circle is connected with the outer thread of the outer diameter of the cone cutter bracket through the inner thread of the inner diameter, the cone cutter bracket is limited to the adjusting circle, and the powder making chamber of the bean grinding assembly is the inner chamber between the inner and outer cone cutters of the cone cutter bracket and the inner cone cutter; at least two outer sliders of the cover openings at the bean box bottom cover 201 of the bean box assembly are inserted into the lock box groove at the fixing ring of the top cover assembly, and the knob is turned to adjust the gear assembly The teeth on one side of the lock adjustment gear drive the fixed ring to rotate through the first transmission gear, and the lock box groove of the fixed ring locks the outer slider of the cover of the bean box bottom cover. At this time, continue to turn the knob until the arc-shaped edge on the other side of the lock adjustment gear disengages from the first transmission gear. During the above process, the lock adjustment gear drives the adjustment circle of the bean grinding assembly to rotate through the adjustment circle gear, and drives the cone knife bracket in the adjustment circle to rotate. The adjustment ring drives the inner and outer cone knives of the cone knife bracket to rotate, and moves up and down to adjust the gap between the outer diameter of the outer cone knife and the inner diameter of the inner cone knife to adjust the coarseness and fineness of the powder grinding.

[0026] An upper positioning piece 1031 is provided in the knob shaft at the bottom of the knob of the top cover assembly. When the slot of the knob shaft hole at the bottom of the knob is fitted with the convex rib 4012 of the lock adjustment gear 401, the upper positioning piece of the knob is inserted into the lower positioning gap 4011 symmetrically on both sides of the gear shaft of the lock adjustment gear. The two sides of the lower positioning gap are symmetrically 60 degrees fan-shaped drive gap angle. The box body of the bean box assembly is square, and the bottom of the square box body corresponds to the box cover groove 101 at the top of the top cover assembly. The box cover hole is set in the box cover groove. The box cover groove and the box body are square, and the bottom of the box body fits with the groove of the box cover groove. The outer slider of the lid opening at the bean box bottom cover of the bean box assembly is a lock slider 202, and the lock head at one end of the lock slider extends out of the bean box bottom cover through the lock spring 203 at the rear, and the lock head of the lock slider is provided with a chamfered inclined surface, and the guide inlet at one end of the lock box slot at the fixing ring of the top cover assembly is provided with a barb, and the other end of the lock box slot is provided with a limit groove. A raised positioning column 2011 is provided on one side of the bean box bottom cover at the lock slider of the bean box assembly, and the positioning column corresponds to the opening groove on one side of the box cover hole of the top cover assembly, and the inner diameter of the bean box bottom cover is provided with three equally spaced triangular bean bin doors 2012. The inner cone cutter of the bean grinding assembly is reduced from the bottom to the top to form a cone shape. The inner cone cutter is fixed to the oblique inner groove of the inner and outer cone cutters of the cone cutter bracket through the oblique wedge head buckle on the outer diameter of the bottom. The top plane of the inner cone cutter is fixed to the cutter head shaft of the gear reduction box through a nut. The outer diameter of the inner cone cutter is provided with an arc-shaped spiral cutter head and a spiral edge groove. The outer diameter above the oblique wedge head of the inner cone cutter is provided with an oblique gear ring. The oblique gear ring of the inner cone cutter is meshed with the oblique tooth groove in the outer cone cutter. The bottom of the inner cone cutter is provided with a bearing. A travel switch 5 is provided on one side of the fixed ring at the bottom of the top cover assembly. A trigger rod is provided on one side of the travel switch of the fixed ring. When the arc edge on the other side of the first gear at the lock adjustment gear of the adjustment gear assembly is disengaged from the transmission gear, the trigger rod of the fixed ring is against the travel switch.

[0027] Thus, a bean box bottom cover assembly is installed at the bottom of the bean box of the bean box assembly, and the bean box bottom cover assembly includes a bean box bottom cover, a locking slider, a locking spring, and a pressure plate. The bean box bottom cover assembly and the bean box rotate; there are three locking sliders on the bean box bottom cover, and the ends of the locking sliders are provided with chamfered inclined surfaces. When the bean box is pressed downward, the locking sliders will retract and move backward, and pre-hook the fixing ring through the inverted position. The bean box is installed in the top cover, and the locking slider at the bottom of the bean box assembly is pressed downward by the bean box assembly. The chamfered inclined surface cooperates with the compression locking spring to retreat until it cooperates with the inverted hook on the top cover assembly and is stuck. When the knob is turned to lock the bean box assembly, the knob is turned, and the knob drives the fixing ring to rotate through the gear transmission. During the rotation process, the locking slider is pushed into the position of the limit slot, and the locking spring drives the locking slider to extend into the bottom of the top cover, and the bean box assembly is locked at this time. Turn the knob to adjust the grinding gear. After turning the knob to lock the bean box assembly, continue to turn the knob. Since there is no tooth meshing at the arc edge of the lock adjustment gear, the adjustment ring gear will be rotated to adjust the grinding gear. The adjustment ring and the cone knife fixing frame are threaded. During the forward and reverse rotation of the adjustment ring, the cone knife bracket will be driven to move up and down. The matching clearance of the inner and outer cone knives is adjusted to control the coarseness of the grinding. When the lock adjustment gear and the adjustment ring gear are rotated, only part of the teeth of the lock adjustment gear are meshed with the first transmission gear. After the knob is rotated to a certain angle, the lock adjustment gear loses the tooth meshing with the first transmission gear. At this time, continuing to turn the knob will drive the adjustment ring gear under the lock adjustment gear to rotate, and the adjustment ring gear drives the second transmission gear under the first transmission gear to rotate, so that the same knob controls two action mechanisms. The above-mentioned bean box bottom cover assembly rotates with the bean box, and the three lock sliders around it are telescopically slid along the axis of the bean box. At this time, the lock slider compresses the lock spring backward through the chamfer during the downward pressing of the bean box, and the lock slider is stuck with the top cover hook.

Claims

1. A bean grinding device for a bean grinding coffee machine, the bean grinding device comprising a top cover assembly (1), a bean box assembly (2) and a bean grinding assembly (3), the bean grinding assembly being arranged at the bottom of a box cover hole (102) of the top cover assembly via a bean grinding bracket (302), a cutter head in a powder making chamber at the top of the bean grinding assembly being connected to a motor shaft of a motor (303) at the bean grinding bracket via a gear reduction box, the powder making chamber of the bean grinding assembly being in communication with a powder outlet channel of the bean grinding bracket, and the bean box assembly being arranged at the top of the box cover hole of the top cover assembly; characterized in that The bottom of the box cover hole (102) of the top cover assembly (1) is provided with a fixing ring (104), the outer diameter of the bottom of the fixing ring is provided with an upper gear ring, the top ring opening of the fixing ring is inserted into the box cover hole of the top cover assembly, and the inner diameter of the ring opening of the fixing ring is provided with a box lock groove; an adjusting gear assembly (4) is provided on one side of the bottom of the top cover assembly where the top cover assembly is connected to the bean grinding assembly (3), the gear shaft rod at the lock adjusting gear (401) of the adjusting gear assembly is sleeved with the knob shaft rod at the bottom of the knob (103) on one side of the top cover assembly, and the outer diameter of the lock adjusting gear of the adjusting gear assembly is aligned with the adjusting gear shaft rod. When the first transmission gear (402) on one side of the interlocking gear assembly is meshed, the other side of the first transmission gear is meshed with the upper gear ring on the outer diameter of the fixing ring, the second transmission gear on one side below the same gear shaft of the first transmission gear is meshed with the lower gear ring on the outer diameter of the inner adjustment ring (301) of the grinding bean support (302), and the other side of the second transmission gear is meshed with the adjustment ring gear (403) on the same gear shaft below the lock adjustment gear. The adjustment ring gear, the lock adjustment gear, and the gear shaft are connected as a whole. A tooth opening is provided on one side of the outer diameter of the lock adjustment gear. The symmetrical The other side is provided with an arc edge; the blade head of the bean grinding assembly is an inner conical blade (304); a conical blade bracket (305) is provided in the adjusting ring of the bean grinding assembly; an outer conical blade is provided in the conical blade bracket; the outer diameter of the adjusting ring is meshed with the adjusting ring gear of the adjusting gear assembly; the adjusting ring is connected to the outer thread of the outer diameter of the conical blade bracket through the inner thread of the inner diameter; the conical blade bracket is limited to the adjusting ring; the powder making chamber of the bean grinding assembly is the inner chamber between the inner and outer conical blades of the conical blade bracket and the inner conical blade; at least two cover opening outer sliding blocks at the bean box bottom cover (201) of the bean box assembly (2) are inserted into the fixed The fixed ring locks the box groove, turns the knob, and the teeth on one side of the lock adjustment gear of the adjustment gear assembly drive the fixed ring to rotate through the first transmission gear. The lock box groove of the fixed ring locks the outer slider of the cover of the bean box bottom cover. At this time, continue to turn the knob until the arc-shaped edge on the other side of the lock adjustment gear disengages from the first transmission gear. During the above process, the lock adjustment gear drives the adjustment circle of the bean grinding assembly to rotate through the adjustment ring gear, and the adjustment circle drives the inner and outer cone knives of the cone knife bracket to rotate, and moves up and down to adjust the gap between the outer diameter of the outer cone knife and the inner diameter of the inner cone knife to adjust the coarseness and fineness of the grinding gear.

2. The bean grinding device of the coffee bean grinding machine according to claim 1, characterized in that The adjusting gear assembly (4) omits the locking adjusting gear (401) and the first transmission gear (402), omits the upper gear ring at the fixing ring (104) of the top cover assembly (1), and the bean box assembly (2) locks the outer sliding block of the bean box bottom cover (201) into the locking box groove of the fixing ring by rotating.

3. The bean grinding device of the coffee bean grinding machine according to claim 1, characterized in that The locking adjustment gear (401) and the first transmission gear (402) in the adjustment gear assembly (4) are arranged on the bean box knob assembly, and the bean box knob of the top cover assembly (1) is meshed with the upper gear ring of the fixing ring (104) in sequence through the locking adjustment gear and the first transmission gear of the bean box knob assembly.

4. The bean grinding device of the coffee bean grinding machine according to claim 1, characterized in that The adjusting gear assembly (4) omits the adjusting ring gear (403) and the second transmission gear, and the bean grinding bracket (302) of the bean grinding assembly (3) omits the adjusting ring (301).

5. The bean grinding device of the coffee bean grinding machine according to claim 1, characterized in that An upper positioning piece (1031) is provided in the bottom knob shaft of the knob (103) of the top cover assembly (1), and when the slot of the knob shaft hole at the bottom of the knob is fitted with the convex rib (4012) of the lock adjustment gear (401), the upper positioning piece of the knob is inserted into the lower positioning gap (4011) symmetrically on both sides of the gear shaft of the lock adjustment gear, and the two sides of the lower positioning gap are symmetrically formed into a 60-degree fan-shaped driving gap angle.

6. The bean grinding device of the coffee bean grinding machine according to claim 1, characterized in that The bean box assembly (2) has a square box body, the bottom of the square box body corresponds to the box cover groove (101) at the top of the top cover assembly (1), the box cover hole (102) is arranged in the box cover groove, the box cover groove and the box body are correspondingly square, and the bottom of the box body fits in the groove of the box cover groove.

7. The bean grinding device of the coffee bean grinding machine according to claim 1 or 6, characterized in that The outer slider of the cover opening at the bean box bottom cover (201) of the bean box assembly (2) is a locking slider (202), a locking head at one end of the locking slider protrudes out of the bean box bottom cover through a locking spring (203) at the rear, a chamfered inclined surface is provided at the locking head of the locking slider, a barb is provided at the guide port at one end of the lock box slot at the fixing ring (104) of the top cover assembly (1), and a limit slot is provided at the other end of the lock box slot.

8. The bean grinding device of the coffee bean grinding machine according to claim 7, characterized in that A protruding positioning column (211) is provided on one side of the bean box bottom cover (201) at the locking slider (202) of the bean box assembly (2), the positioning column corresponds to an opening groove on one side of the box cover hole of the top cover assembly (1), and the inner diameter of the bean box bottom cover is provided with three equally spaced triangular bean bin doors (212).

9. The bean grinding device of the coffee bean grinding machine according to claim 1, characterized in that The inner conical cutter (304) of the bean grinding assembly (3) is tapered from the bottom to the top to form a conical shape. The inner conical cutter is fixed to the oblique inner grooves of the inner and outer conical cutters of the conical cutter support (305) by means of an oblique wedge head buckle on the outer diameter of the bottom. The top plane of the inner conical cutter is fixed to the cutter head shaft of the gear reduction box by means of a nut. The outer diameter of the inner conical cutter is provided with an arc-shaped spiral cutter head and a spiral side groove. The outer diameter above the oblique wedge head of the inner conical cutter is provided with an oblique gear ring. The oblique gear ring of the inner conical cutter meshes with the oblique tooth groove in the outer conical cutter. A bearing is provided at the bottom of the inner conical cutter.

10. A coffee bean grinding machine comprising the coffee bean grinding device of any one of claims 1 to 9, characterized in that The top cover assembly (1) is arranged on the top of the machine body, and the powder outlet channel at the bean grinding support (302) of the bean grinding assembly (3) is in communication with the funnel in the coffee cavity assembly.

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