Detachable straight-through type coffee machine bean grinding device

Abstract

The invention relates to a detachable straight-through type coffee machine bean grinding device, and aims to solve the technical problems that a grinding assembly of an existing similar product lacks a straight leakage channel design, accumulation and blockage of coffee powder are easily caused, and the interior of the straight leakage channel is inconvenient to clean. A direct leakage channel is arranged in a bean grinding assembly of the bean grinding device of the coffee machine, and a hollow hole is formed in a center hole in a bean grinding conical cutter adjusting disc of a lower cutter grinding assembly; when the bean grinding assembly is arranged at a powder outlet of the coffee machine, a channel opening in one end of a direct leakage channel at the bottom of the bean grinding assembly and the end face of the bottom of the bean grinding assembly extend out of an orifice at the powder outlet of the coffee machine. An assembling key on one side of a gear adjusting disc extending out of the gear adjusting disc assembly is aligned with an indication mark on the outer diameter of a powder outlet of the coffee machine, and the bottom of the bean grinding assembly extending out of a hole opening of the powder outlet of the coffee machine is pressed down. And a mounting convex buckle on the outer side end face of a direct leakage channel at the bottom of the bean grinding assembly is buckled into a gap between inner rings of buckles in the gear adjusting disc and is rotationally buckled.

Description

Technical Field

[0001] The invention relates to a bean grinding device for a coffee machine, in particular to a detachable straight-through type bean grinding device for a coffee machine. Background Art

[0002] A coffee machine is an electrical device used for making coffee, which is generally divided into semi-automatic and fully automatic. A semi-automatic coffee machine requires manual operation of grinding, pressing, loading, brewing, and manually removing residues. A fully automatic coffee machine is a coffee machine that integrates the entire process of brewing coffee, such as preheating, cleaning, grinding, pressing, brewing, and draining, and automatically controls the entire process. Coffee is brewed according to scientific data and procedures, and coffee can be obtained with just a light press. In existing coffee machines, the coffee bean grinding device usually adopts an indirect discharge method, that is, the ground coffee powder is first collected in a container, and then transported to the brewing part of the coffee machine through a pipeline or other means. This method has some problems, such as easy accumulation and blockage of coffee powder, affecting the grinding efficiency and the quality of coffee, accumulation or blockage of the powder channel, and it is impossible to clean and dredge it. The entire machine needs to be disassembled and the entire brewing device can be disassembled to achieve this. At the same time, the indirect discharge method also requires additional components and space, which increases the complexity and cost of the coffee machine. Therefore, a new type of direct leakage coffee bean grinding device is needed to improve the performance and reliability of the coffee machine. The grinding components of some existing coffee machines have a detachable function, such as the application number 200480010958.3 disclosed in the Chinese patent literature, the publication date of May 24, 2006, and the invention name "Coffee grinder with a detachable box"; another example is the application number 202220894983.8 disclosed in the Chinese patent literature, the authorization announcement date of October 28, 2022, and the utility model name "Coffee bean grinder"; but the above-mentioned products and similar products mainly involve the disassembly of the bean box assembly, or the overall disassembly of the grinding bean assembly. The installation of the bean box after disassembly is inconvenient, and the stability after installation is difficult to ensure. The installation of the grinding bean assembly after disassembly is inconvenient, and the grinding coarseness is difficult to accurately adjust, resulting in poor grinding stability. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a detachable straight-through coffee machine grinding device to the art, so as to solve the technical problems that the grinding assembly of the existing similar products lacks a direct leakage channel design, which easily causes the accumulation and blockage of coffee powder, and the direct leakage channel is inconvenient to clean, the lower grinding assembly lacks a disassembly structure design, and the bean box assembly has a poor disassembly structure design, which is inconvenient to operate. The purpose is achieved through the following technical solutions.

[0004] A detachable straight-through coffee machine bean grinding device, the bean box assembly of the coffee machine bean grinding device is arranged in the groove on the top of the seat body of the bean box seat assembly, the bean box assembly is connected with the bean box seat assembly as a whole, the bottom of the bean box seat assembly is provided with a grinding assembly, a direct leakage channel is provided in the grinding assembly, an upper grinding knife assembly and a lower grinding knife assembly are provided in the grinding chamber formed by the buckling of the grinding knife assembly upper cover and the grinding knife assembly lower cover, the motor on one side of the upper cover of the grinding knife assembly drives the upper grinding knife assembly to rotate through the gear box assembly, the upper grinding knife assembly drives the lower grinding knife assembly to rotate, and the center hole of the grinding knife cone adjustment disk of the lower grinding knife assembly is provided with a hollow hole; the key point of its structural design is that when the grinding knife assembly is arranged at the powder outlet of the coffee machine, the channel opening at one end of the direct leakage channel at the bottom of the grinding knife assembly and the bottom end face of the grinding knife assembly extend out of the orifice at the powder outlet of the coffee machine, and the other end face of the direct leakage channel at the top of the grinding knife assembly The end channel opening is sealed against the hole at the bean outlet of the seat body at the bottom of the bean box seat assembly, and the buckle convex rib at the outer diameter of the seat body of the bean box seat assembly is fixed in the coffee machine. At the same time, the grinding bean assembly is fixed in the coffee machine through the seat body of the bean box seat assembly, and the assembly button on one side of the gear adjustment disk of the gear adjustment disk assembly is aligned with the indicator mark at the outer diameter of the powder outlet of the coffee machine. The bottom of the grinding bean assembly extending out of the hole at the powder outlet of the coffee machine is pressed by pressing the assembly button, and the gap between the inner rings of the buckles in the gear adjustment disk is buckled into the mounting convex buckle of the outer end face of the direct leakage channel at the bottom of the grinding bean assembly; and the gear adjustment disk of the gear adjustment disk assembly is rotated, and the buckle inner ring of the gear adjustment disk assembly is buckled with the mounting convex buckle of the grinding bean assembly, and the gear adjustment disk assembly is installed and fixed to the bottom of the grinding bean assembly, and one end of the assembly button in the gear adjustment disk is located at one of the gaps in the inner ring of the buckle in the gear adjustment disk. The bean box assembly is a detachable bean box assembly, which is specifically realized by driving the fixed block of the rotating seat to simultaneously retract and slide out of the lock hole of the bean box assembly and the lock hole of the seat body of the bean box seat assembly through the handle in the box body; at the same time, the coffee machine grinding device can clean the lower grinder assembly of the grinding bean assembly after disassembling the gear adjustment plate assembly, and further disassemble the lower grinder assembly according to the following structure to better clean the direct leakage channel in the lower grinder assembly and the upper grinder assembly. The bottom of the direct leakage channel is located at the powder outlet connecting the grinding bean assembly and the coffee machine, which is used to drop the ground coffee powder vertically and directly to the powder receiving position to avoid powder blockage.

[0005] The bean grinding cone of the lower grinding knife assembly is connected and fixed to the bean grinding cone adjustment disk through a connecting shaft, and the outer diameter of the bean grinding cone adjustment disk at the bottom of the bean grinding cone is provided with equidistantly arranged and raised mounting ears, and the bean grinding cone adjustment disk and the mounting ears are correspondingly installed in the channel opening of the bottom direct leakage channel of the lower cover of the bean grinding assembly through screws at the mounting ears, and in the ear grooves that communicate with the outer bottom end surface of the channel opening of the bottom direct leakage channel of the lower cover of the bean grinding assembly. The above is a further detachable lower grinding knife assembly, that is, when the powder is blocked or not used for a long time, after removing the gear adjustment disk assembly, the lower grinding knife assembly is further taken out to clean the entire internal grinding channel.

[0006] A second safety switch is provided at the bottom of the lower cover of the grinding assembly above the assembly button. When the gear adjustment disk assembly is installed and fixed to the bottom of the grinding assembly, the assembly button triggers the second safety switch.

[0007] A raised dial portion is provided on one side of the outer diameter of the gear adjustment disk of the gear adjustment disk assembly, and a gear adjustment lifting seat is provided in the middle of the gear adjustment disk, the gear adjustment lifting seat is connected to the gear adjustment disk as a whole, and three equidistantly arranged and raised arc ribs are provided on the lower step surface at the ring surface at the top of the gear adjustment lifting seat, one end of the arc ribs is respectively higher than the other end, and the arc ribs of the gear adjustment lifting seat are abutted against three equidistantly arranged and raised upper step surfaces leaking from the bottom of the lower grinding knife assembly at the bottom of the lower cover of the grinding bean assembly of the upper grinding bean assembly, and one end of the upper step surface corresponding to the arc ribs is respectively lower than the other end, and a balancing spring is provided at the connection screw of the grinding bean cone knife adjustment disk of the lower grinding knife assembly and the lower cover of the grinding bean assembly, and the gear adjustment disk drives the lower grinding knife assembly to move up and down through the rotation of the dial portion.

[0008] The gear adjustment disk assembly has teeth on one side of the top plate opening of the gear adjustment disk, which are evenly spaced, and the teeth are meshed with a driving gear at a potentiometer on one side of the bottom of the lower cover of the upper grinding assembly. The potentiometer includes a PCB board, a driving gear and a fixed bracket. The PCB board of the potentiometer is provided with an angle sensor that automatically identifies the current gear state according to the angle of rotation of the driving gear.

[0009] When the box body of the bean box assembly is arranged in the groove at the top of the seat body of the bean box seat assembly, the bean outlet at the bottom of the box body of the box body of the bean box assembly is fitted with the bean outlet at the bottom of the seat body of the bean box seat assembly, the box outlet at the top of the box body is provided with a box cover, and the bean outlet at the bottom of the box body is provided with a rotating seat, and the disk surface of the bin door at one end of the rotating seat is symmetrically provided with a fan-shaped lower bean hole, and the inner diameter of the bin door corresponding to the box body bean outlet is provided with a fan-shaped upper bean hole of a corresponding shape, and the disk surface edge top of the bin door of the rotating seat is symmetrically provided with a raised track bone position, and the track bone positions on both sides are respectively provided with a fixed block sliding along the track bone position, and one end of the track bone positions on both sides is respectively provided with an unlocking groove bent inwardly; when the rotating seat is rotated by the handle at the other end of the box body until the lower bean hole of the rotating seat is aligned with the upper bean hole of the box body, one end of the fixed blocks on both sides of the rotating seat respectively extends out of the lock holes communicated on both sides of the box body and the seat body, and the fixed blocks are respectively arranged at the track bone positions on both sides of the rotating seat, and the fixed blocks are respectively fixed to the fixed block grooves on the bottom plane of both sides of the lower bean hole of the box body.

[0010] A limiting column is provided at the track bone position on one side of the rotating seat, and a raised limiting point is provided on the bottom plane of one side of the lower bean hole of the box body corresponding to the limiting column.

[0011] A limiting rib is symmetrically provided at the track bone position on the other side of the limiting column of the rotating seat, and a raised limiting piece is symmetrically provided on the bottom plane on the other side of the lower bean hole of the box body corresponding to the limiting rib, and the limiting rib is limited between the two limiting pieces.

[0012] A bean-stopping cover which is fitted and fixed to the rod of the rotating seat is provided at the handle at the other end of the rotating seat, the cover opening of the bean-stopping cover increases in size from the handle toward the bottom of the box body and is in a conical shape, the cover opening of the bean-stopping cover is aligned with the oblique surface above the bean outlet of the box body at the bottom of the box body of the bean box assembly and a bean-inlet gap is provided, the bean-stopping cover is fitted and fixed to the flat key surface of the rod of the rotating seat, and the handle is fixed to the top of the rod of the rotating seat by screws, and one side of the outer diameter of the handle is tilted in an L shape.

[0013] One end of the fixed block at the track bone position on one side of the rotating seat extends out of the lock hole of the seat body of the bean box seat assembly. At the same time, the fixed block triggers the first safety switch through the top rod of the top rod assembly set on the outer diameter of the seat body. The first safety switch is set on the outer diameter side of the housing of the top rod assembly. The outer diameter of the top rod in the housing of the top rod assembly is provided with a top rod spring. The outer diameter of the lock hole of the seat body of the bean box seat assembly on the other side of the top rod assembly is provided with a bracket holder. When the fixed block on this side is extended, it is inserted into the bracket holder.

[0014] The gearbox assembly at the motor is a planetary gearbox assembly. The motor shaft at the horizontally arranged motor is connected to the reduction gear assembly in the planetary gearbox assembly. The bevel gear extending from one end of the planetary gearbox assembly is meshed with the helical gear ring at the upper grinder drive disk of the upper grinder assembly. A concave grinder is arranged in the upper grinder drive disk. The upper teeth of the inner diameter of the concave grinder are reversely meshed with the lower teeth at the bottom of the outer diameter cone surface of the bean grinding cone cutter of the lower grinder assembly. When the planetary gearbox assembly drives the concave grinder to rotate and grind beans through the bean grinding cone cutter and the upper grinder drive disk, the bean grinding cone cutter does not move. The upper and lower end openings of the upper grinder drive disk are respectively provided with bearings, and the bottom opening of the upper grinder drive disk of the upper grinder assembly is provided with a flexible sealing ring. The above-mentioned planetary gearbox assembly, the motor and the upper cover of the bean grinding assembly constitute a motor drive assembly.

[0015] A raised edge is provided at one end corner of the top groove of the seat body of the bean box seat assembly, and a side groove is provided at the bottom inclined end corner of the box body corresponding to the edge of the bean box assembly. The side groove of the box body is correspondingly inserted into the edge of the seat body, and the outer diameter of the box body is flush with the outer diameter of the seat opening of the seat body.

[0016] The invention has a reasonable structural design, and the bean box assembly, the gear adjustment plate assembly and the lower grinder assembly are easy to load and unload, and the upper grinder and the lower grinder of the bean grinding assembly are easy to clean, especially the direct leakage channel in the bean grinding assembly is easy to clean, and it is not easy to cause accumulation and blockage of coffee powder; the invention is suitable as a detachable straight-through coffee machine grinding device, and a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the exploded structure of the main components of the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of further partial explosion structure of .

[0019] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure after assembly, in which part A is framed.

[0020] Figure 4 yes Figure 3 Enlarged view of part A.

[0021] Figure 5 yes Figure 3 schematic diagram of sectional structure at the fixed block.

[0022] Figure 6 yes Figure 3 Schematic diagram of the bottom structure after the bean box seat assembly is removed, with part B framed in the figure.

[0023] Figure 7 yes Figure 6 An enlarged view of part B, in which the dotted line is the shell structure of the ejector assembly.

[0024] Figure 8 yes Figure 6 Schematic diagram of the bottom structure of the bean box assembly after it is removed.

[0025] Fig. 9 yes Figure 8 The bottom structure diagram of the box is omitted.

[0026] Fig.10 yes Figure 2 Schematic diagram of the enlarged structure of the combined state of the fixed block and the rotating seat.

[0027] Fig.11 yes Figure 3 Schematic diagram of the bottom structure of the gear adjustment dial assembly in the open state.

[0028] Fig.12 yes Fig.11 Schematic diagram of the bottom structure after the lower cover of the grinding bean assembly is removed, in which the lower cover of the grinding bean assembly and the gear adjustment dial assembly are omitted.

[0029] Fig.13 yes Fig.11 A schematic diagram of the structure of part of an embodiment before the gear adjustment disk assembly is installed.

[0030] Fig.14 yes Fig.13 A schematic diagram of the structure of part of the embodiment after the gear adjustment disk assembly is installed.

[0031] Serial number and name of the attached drawings: 1. Bean box assembly, 2. Bean box seat assembly, 3. Bean grinding assembly, 4. Gear adjustment plate assembly, 5. Box cover, 6. Handle, 7. Bean blocking cover, 8. Box body, 9. Screw, 10. Rotating seat, 1001. Bin door, 1002. Track bone position, 1003. Limiting column, 1004. Limiting rib, 11. Fixed block, 1101. Limiting point, 1102. Limiting piece, 12. Seat body, 1201. Buckle convex rib, 13. First safety switch, 14. Bean grinding assembly upper cover, 15. Planetary gear box assembly, 16. Motor, 17. Upper grinding knife assembly, 1701. Upper grinding knife drive disk, 1702, flexible sealing ring, 18, lower cover of bean grinding assembly, 1801, mounting convex buckle, 19, lower grinding knife assembly, 1901, grinding bean cone knife adjustment disk, 19011, upper step surface, 1902, grinding bean cone knife, 20, gear adjustment lifting seat, 2001, arc rib, 21, fixed pressure plate, 22, assembly button, 23, adjustment feedback contact, 24, gear adjustment disk, 2401, buckle inner ring, 2402, dial part, 2403, tooth mouth, 25, potentiometer, 2501, driving gear, 26, second safety switch, 27, push rod assembly, 2701, push rod, 2702, push rod spring. Implementation

[0032] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 14As shown, the bean box assembly 1 of the coffee machine bean grinding device is arranged in the top groove of the seat body 12 of the bean box seat assembly 2, the bean box assembly is connected with the bean box seat assembly as a whole, the bottom of the bean box seat assembly is provided with a bean grinding assembly 3, a direct leakage channel is provided in the bean grinding assembly, and an upper grinding knife assembly 17 and a lower grinding knife assembly 19 are provided in the grinding chamber formed by the buckling of the upper cover 14 and the lower cover 18 of the grinding knife assembly. The motor 16 on one side of the upper cover of the grinding knife assembly drives the upper grinding knife assembly to rotate through the gear box assembly, and the upper grinding knife assembly drives the lower grinding knife assembly to rotate, and the center hole of the grinding knife cone adjustment disk 1901 of the lower grinding knife assembly is provided with a hollow hole. When the bean grinding assembly is arranged at the powder outlet of the coffee machine, the channel opening at one end of the direct leakage channel at the bottom of the bean grinding assembly and the end surface of the bottom of the bean grinding assembly extend out of the orifice at the powder outlet of the coffee machine, and the channel opening at the other end of the direct leakage channel at the top of the bean grinding assembly abuts against and seals the orifice at the bean outlet of the seat body at the bottom of the bean box seat assembly, and the buckle convex rib 1201 at the outer diameter of the seat body of the bean box seat assembly is fixed in the coffee machine. At the same time, the bean grinding assembly is fixed in the coffee machine through the seat body of the bean box seat assembly, and the gear adjustment disk 24 of the gear adjustment disk assembly is extended out, and the button 22 on one side is assembled with the powder outlet of the coffee machine. The indicator marks at the outer diameter are aligned, and the bottom of the grinding bean assembly extending out of the hole at the powder outlet of the coffee machine is pressed. The gap between the inner ring 2401 of the buckle in the gear adjustment disk is buckled into the mounting convex buckle 1801 on the outer end face of the direct leakage channel at the bottom of the grinding bean assembly; and the gear adjustment disk of the gear adjustment disk assembly is rotated, and the buckle inner ring of the gear adjustment disk assembly is buckled with the mounting convex buckle of the grinding bean assembly. The gear adjustment disk assembly is installed and fixed to the bottom of the grinding bean assembly, and one end of the assembly button in the gear adjustment disk is located at one of the gaps in the inner ring of the buckle in the gear adjustment disk. The bean grinding cone 1902 of the lower grinding knife assembly is connected and fixed to the bean grinding cone adjustment disk via a connecting shaft. The outer diameter of the bean grinding cone adjustment disk at the bottom of the bean grinding cone is provided with equidistantly arranged and raised mounting ears. The bean grinding cone adjustment disk and the mounting ears are correspondingly installed in the channel opening of the direct leakage channel at the bottom of the lower cover of the bean grinding assembly through screws at the mounting ears, and in the ear grooves communicated with the outer bottom end surface of the channel opening of the direct leakage channel at the bottom of the lower cover of the bean grinding assembly.

[0033] A second safety switch 26 is provided at the bottom of the lower cover of the grinding assembly above the assembly button. When the gear adjustment dial assembly is installed and fixed to the bottom of the grinding assembly, the assembly button triggers the second safety switch. A raised dial portion 2402 is provided on one side of the outer diameter of the gear adjustment disk of the gear adjustment disk assembly, and a gear adjustment lifting seat 20 is provided in the middle of the gear adjustment disk, the gear adjustment lifting seat is connected to the gear adjustment disk as a whole, and three equidistantly arranged and raised arc ribs 2001 are provided on the lower step surface at the ring surface at the top of the gear adjustment lifting seat, one end of the arc ribs is respectively higher than the other end, and the arc ribs of the gear adjustment lifting seat are abutted against three equidistantly arranged and raised upper step surfaces 19011 leaking from the bottom of the lower grinding knife assembly at the bottom of the lower cover of the grinding bean assembly of the upper grinding bean assembly, and one end of the upper step surface corresponding to the arc ribs is respectively lower than the other end, and a balancing spring is provided at the connection screw of the grinding bean cone adjustment disk of the lower grinding knife assembly and the lower cover of the grinding bean assembly, and the gear adjustment disk drives the lower grinding knife assembly to move up and down through the rotation of the dial portion. The gear adjustment disk of the gear adjustment disk assembly has teeth 2403 with equal spacing on one side of the top plate, and the teeth are engaged with the driving gear 2501 of the potentiometer 25 at the bottom side of the lower cover of the upper grinding assembly. The potentiometer includes a PCB board, a driving gear and a fixed bracket. The PCB board of the potentiometer is provided with an angle sensor that automatically identifies the current gear state according to the angle of rotation of the driving gear.

[0034] When the box body of the bean box assembly is arranged in the groove at the top of the seat body of the bean box seat assembly, the bean outlet at the bottom of the box body of the bean box assembly is fitted with the bean outlet at the bottom of the seat body of the bean box seat assembly, a box cover 5 is provided at the box opening at the top of the box body, a rotating seat 10 is provided at the bean outlet at the bottom of the box body, a fan-shaped lower bean hole is symmetrically provided at the bin door 1001 at one end of the rotating seat, and a fan-shaped upper bean hole corresponding to the inner diameter of the bean outlet of the box body of the bin door is provided, and a raised track is symmetrically provided at the top of the disk edge of the bin door of the rotating seat The track bone position 1002, the track bone positions on both sides are respectively provided with fixed blocks 11 sliding along the track bone positions, and one end of the track bone positions on both sides is respectively provided with unlocking grooves bent inwards; when the rotating seat is rotated by the handle 6 at the other end of the box body until the lower bean hole of the rotating seat is aligned with the upper bean hole of the box body, one end of the fixed blocks on both sides of the rotating seat respectively extends out of the lock holes communicating with both sides of the box body and the seat body, and the fixed blocks are respectively arranged at the track bone positions on both sides of the rotating seat, and the fixed blocks are respectively fixed to the fixed block grooves on the bottom planes on both sides of the lower bean hole of the box body. A limiting column 1003 is provided at the track bone position on one side of the rotating seat, and a raised limiting point 1101 is provided on the bottom plane on one side of the lower bean hole of the box body corresponding to the limiting column; a limiting rib 1004 is provided at the track bone position on the other side of the limiting column of the rotating seat, and a raised limiting piece 1102 is symmetrically provided on the bottom plane on the other side of the lower bean hole of the box body corresponding to the limiting rib, and the limiting rib is limited between the two limiting pieces.

[0035] The handle at the other end of the rotating seat is provided with a bean-blocking cover 7 that is fitted and fixed to the rod of the rotating seat. The cover opening of the bean-blocking cover increases from the handle to the bottom of the box body and is conical. The cover opening of the bean-blocking cover is aligned with the oblique surface above the bean outlet of the box body at the bottom of the box body of the bean box assembly and a bean-inlet gap is provided. The bean-blocking cover is fitted and fixed to the flat key surface of the rod of the rotating seat. At the same time, the handle is fixed to the top of the rod of the rotating seat by screws 9, and the outer diameter side of the handle is tilted in an L shape. At the same time, one end of the fixed block at the track bone position on one side of the rotating seat extends out of the lock hole of the seat body of the bean box seat assembly. At the same time, the fixed block triggers the first safety switch 13 through the top rod 2701 of the top rod assembly 27 set on the outer diameter of the seat body. The first safety switch is set on the outer diameter side of the shell of the top rod assembly. The outer diameter of the top rod of the shell of the top rod assembly is provided with a top rod spring 2702.

[0036] The gearbox assembly at the motor is a planetary gearbox assembly 15. The motor shaft at the horizontal motor is connected to the reduction gear assembly in the planetary gearbox assembly. The bevel gear extending from one end of the planetary gearbox assembly meshes with the helical gear ring at the upper grinding drive disk 1701 of the upper grinding assembly. A concave grinding knife is arranged in the upper grinding drive disk. The upper teeth of the inner diameter of the concave grinding knife mesh with the lower teeth at the bottom of the outer diameter cone surface of the bean grinding cone 1902 of the lower grinding assembly in the opposite direction. When the planetary gearbox assembly drives the concave grinding knife to rotate and grind beans through the bean grinding drive disk and the upper bean grinding drive disk, the bean grinding cone does not move. The upper and lower ends of the upper grinding drive disk are respectively provided with bearings, and the bottom of the upper grinding drive disk of the upper grinding assembly is provided with a flexible sealing ring 1702. The planetary gearbox assembly, the motor and the upper cover of the bean grinding assembly constitute a motor drive assembly. A raised edge is provided at one end corner of the top groove of the bean box seat assembly, and a side groove is provided at the bottom inclined end corner of the bean box assembly corresponding to the edge of the bean box assembly. The side groove of the box body is correspondingly inserted into the edge of the seat body, and the outer diameter of the box body is flush with the outer diameter of the seat opening of the seat body.

[0037] The coffee bean grinding device is a coffee bean grinding device for a coffee machine with a direct-falling powder drop, and comprises a bean box assembly, a bean box seat assembly, a bean grinding assembly and a gear adjustment disc assembly.

[0038] The detachable bean box assembly is a bean box assembly that is fixed on the top of the machine by rotation. The box body of the bean box assembly is made of food-grade materials and has a certain capacity for storing coffee beans. The shape and size of the box body match the main body of the coffee machine, and it is firmly installed and easy to disassemble. A sealing structure is provided at the box cover of the bean box assembly, and a sealing structure is provided at the connection between the box body and the box cover to prevent coffee beans from leaking and moisture from entering. The coffee bean leakage prevention structure of the bean box assembly is as follows: rotating the handle 90° drives the rotating seat to rotate at the same time, and drives the fixed blocks on both sides to extend and retract, to control the fixing and leakage of the box body, and the functions of unlocking and stopping the leakage of coffee beans; and when the fixed block is extended, it will hold up the first safety switch approaching to prevent the machine from starting the bean grinding device without putting in the box body and locking the box body; this structure is simple to operate, safe and stable.

[0039] The grinding disc of the bean grinding assembly consists of two grinding discs that cooperate with each other, one is a fixed grinding disc and the other is a rotating grinding disc, namely the upper grinding knife assembly and the lower grinding knife assembly. The biggest difference between this device and the traditional grinding disc is that it is fixed in reverse. When adjusting the coarseness of the coffee powder, the bean cone knife rotates and adjusts; the traditional adjustment method is that the bean cone knife is fixed to the motor shaft, and the concave grinding knife rotates when adjusting the coarseness. The grinding disc is made of high-hardness material 420 stainless steel to ensure long-term use; the surface of the grinding disc is designed with specific patterns to improve the grinding efficiency and uniformity of fineness; at the same time, the lower grinding knife assembly can be removed and separated from the machine for easy channel cleaning and descaling. The driving method of the bean grinding assembly adopts a motor-driven planetary gearbox assembly, which is connected to the rotating grinding disc to provide power for it. The motor has sufficient power and stable speed to ensure the grinding effect. The adjustment mechanism of the bean grinding assembly is used to adjust the gap between the grinding discs, thereby controlling the fineness of the coffee powder. Traditional bean grinding devices change the gap between the grinding discs using threaded adjustment. The adjustment mechanism of the bean grinding assembly can be manually mechanical, which is convenient for users to adjust according to their needs, and can also be combined with a potentiometer to identify the adjustment gear and automatically allocate the grinding time. The vertical drop powder channel of the bean grinding assembly is vertically connected between the grinding structure and the powder outlet of the coffee machine, and is used to directly transport the ground coffee powder to the powder receiving position without the need for a secondary powder feeding structure and a secondary channel for transmission.

[0040] The above-mentioned fixed block retracts and locks the motion track. When the fixed block is locked with the main body, the bean unloading passage between the rotating seat and the bean box is unobstructed, and the beans can be unloaded. When the fixed block is extended, the fixed block and the main body are engaged to achieve locking, and the top rod of the top rod assembly is pushed to the connecting piece of the switch to trigger the first safety switch. The above-mentioned fixed blocks are respectively arranged at the track bone positions on both sides of the rotating seat. When the handle is rotated counterclockwise, the track bone position of the rotating seat drives the fixed block to retract, and the passage between the rotating seat and the bean box seat assembly is closed to prevent the coffee beans inside from scattering when the bean box assembly is taken out; remove the handle upwards, and the bean box assembly is taken out from the box body. Rotate the handle clockwise, and the fixed block slides out along the guide shape at the track bone position of the rotating seat, cooperates and fixes with the box body of the bean box assembly and the seat body of the bean box seat assembly, and turns on the first safety switch, and the passage between the rotating seat and the bean box seat assembly is opened, and the beans are unloaded normally.

[0041] The upper and lower bearings of the bean grinding assembly are used to reduce the resistance of the upper grinding assembly when the motor drives the upper grinding drive disk of the upper grinding assembly, so that the upper grinding assembly can be driven more stably and smoothly. The concave grinding upper grinding knife in the grinding assembly is fixed in the upper grinding drive disk of the upper grinding assembly and rotates. The function of the flexible sealing ring is to prevent the bean powder from entering other spaces of the bean grinding system when the upper and lower grinding assemblies rotate at high speed. The bean grinding cone adjustment disk and the gear adjustment lifting seat are provided with a step surface that rotates in coordination, and the step surface changes the gap between the upper and lower grinding knives with the direction of rotation, thereby changing the coarseness of the ground powder. That is, the lower grinding knife assembly cooperates with the lower cover of the bean grinding assembly and is fixedly connected by a balance spring, which can be installed and removed; the bean grinding cone is connected and fixed to the bean grinding adjustment disk through a connecting shaft; the balance spring is fixed on the bean grinding adjustment disk and connected to the lower cover of the bean grinding assembly, which is used to balance when the upper and lower grinding assemblies rotate to adjust the gap and control the stability of the lower grinding assembly. The bean grinding cone adjustment disc of the lower grinder assembly adopts a hollow hole design to facilitate the coffee powder to fall vertically to the powder receiving position.

[0042] The installation instructions for the gear adjustment disk assembly are as follows: align the gear adjustment disk assembly with the indicator mark, insert it upward to the bottom, then rotate it to the left about 10 degrees, and release the assembly button to fix it; align the gear adjustment disk assembly with the indicator mark, press the gear adjustment disk assembly, and move it down to remove it. That is, there is an indicator mark with a triangular arrow on the left side of the main body of the coffee machine at the powder outlet. Rotate the gear adjustment disk assembly until the assembly button is aligned with the above indicator mark, then press the assembly button, put it upward into the bracket, rotate it to the left about 10°, and release the assembly button to complete the installation. Conversely, rotate the gear adjustment disk assembly to the indicator mark, press the assembly button, and then move it down to remove the gear adjustment disk assembly.

[0043] At the same time, the second safety switch of the gear adjustment disk assembly is used to detect whether the gear adjustment disk assembly is installed in place to prevent accidents; when the gear adjustment lever is turned, the gear adjustment lift seat will also rotate at the same time, and the step surface that matches the grinding disc will rise or fall, thereby adjusting the gap between the upper and lower grinding discs. When installing the gear adjustment disk assembly, the assembly button must be pressed and matched with the bracket buckle before it can be installed. During the left and right adjustment process of the gear adjustment disk, the drive gear on the edge of the potentiometer rotates; the PCB board automatically identifies the current gear state according to the rotation angle of the drive gear, and automatically changes the grinding time. When the above-mentioned gear adjustment disk rotates to the left, when the assembly button contacts the buckle indicated by the blue arrow and stops rotating, it is the minimum gear; when the gear adjustment disk rotates to the right, when the assembly button contacts the buckle indicated by the blue arrow and stops rotating, it is the maximum gear.

[0044] The gear adjustment disc assembly is used to adjust the gap between the upper and lower grinding discs, thereby controlling the fineness of the coffee powder; the gear adjustment disc assembly adopts a manual mechanical lever, which is convenient for users to adjust according to their own needs. It is equipped with a potentiometer to automatically identify the gear position and automatically change the grinding time. That is, when the gear adjustment disc is turned to the right, the lower grinding disc assembly will rise, the gap between the two discs will become smaller, and the ground powder will become finer. On the contrary, it will fall, the gap between the discs will become larger, and the ground powder will become finer. That is, when the gear adjustment disc is adjusted to the left, the lower grinding disc assembly moves down, and the gap between grinding becomes larger; when the gear adjustment disc is adjusted to the right, the lower grinding disc assembly moves up, and the gap between grinding becomes smaller.

Claims

1. A detachable straight-through coffee machine bean grinding device, wherein a bean box assembly (1) of the coffee machine bean grinding device is arranged in a groove at the top of a seat body (12) of a bean box seat assembly (2), the bean box assembly and the bean box seat assembly are connected as a whole, a bean grinding assembly (3) is arranged at the bottom of the bean box seat assembly, a direct leakage channel is arranged in the bean grinding assembly, an upper grinding knife assembly (17) and a lower grinding knife assembly (19) are arranged in a grinding chamber formed by buckling an upper cover (14) of the grinding knife assembly and a lower cover (18) of the grinding knife assembly, a motor (16) on one side of the upper cover of the grinding knife assembly drives the upper grinding knife assembly to rotate through a gear box assembly, and the upper grinding knife assembly drives the lower grinding knife assembly to rotate, and a hollow hole is arranged at the center hole of the grinding knife cone adjustment disk (1901) of the lower grinding knife assembly; characterized in that When the bean grinding assembly (3) is arranged at the powder outlet of the coffee machine, the channel opening at one end of the direct leakage channel at the bottom of the bean grinding assembly and the end surface at the bottom of the bean grinding assembly extend out of the orifice at the powder outlet of the coffee machine, and the channel opening at the other end of the direct leakage channel at the top of the bean grinding assembly abuts against and seals the orifice at the bean outlet of the bottom body of the bean box seat assembly (2). The bean box seat assembly is fixed in the coffee machine by the outer diameter of the seat body (12) of the bean box seat assembly. At the same time, the bean grinding assembly is fixed in the coffee machine through the seat body of the bean box seat assembly. A button (22) is assembled on one side of the gear adjustment disk (24) extending out of the gear adjustment disk assembly (4). The bottom of the grinding bean assembly extending out of the opening of the powder outlet of the coffee machine is aligned with the indicator mark at the outer diameter of the powder outlet of the coffee machine, and the assembly button is pressed, so that the gap between the inner ring of the buckle (2401) in the gear adjustment disk is buckled into the mounting convex buckle (1801) on the outer end surface of the direct leakage channel at the bottom of the grinding bean assembly; and the gear adjustment disk of the gear adjustment disk assembly is rotated, and the buckle inner ring of the gear adjustment disk assembly is buckled with the mounting convex buckle of the grinding bean assembly, and the gear adjustment disk assembly is installed and fixed to the bottom of the grinding bean assembly, and one end of the assembly button in the gear adjustment disk is located at one of the gaps in the inner ring of the buckle in the gear adjustment disk.

2. The detachable straight-through coffee machine grinding device according to claim 1, characterized in that The bean grinding cone (1902) of the lower grinding blade assembly (19) is connected and fixed to the bean grinding cone adjustment disk (1901) via a connecting shaft; the outer diameter of the bean grinding cone adjustment disk at the bottom of the bean grinding cone is provided with equidistantly arranged and raised mounting ears; the bean grinding cone adjustment disk and the mounting ears are correspondingly mounted in the channel opening of the bottom direct leakage channel of the lower cover (18) of the bean grinding assembly via screws at the mounting ears, and in the ear grooves communicating with the outer bottom end surface of the channel opening of the bottom direct leakage channel of the lower cover of the bean grinding assembly.

3. The detachable straight-through coffee machine grinding device according to claim 1, characterized in that A second safety switch (26) is provided at the bottom of the lower cover (18) of the grinding assembly (3) above the assembly button (22); when the gear adjustment disk assembly (4) is mounted and fixed to the bottom of the grinding assembly, the assembly button triggers the second safety switch.

4. The detachable straight-through coffee machine grinding device according to claim 1, characterized in that A raised dial portion (2402) is provided on one side of the outer diameter of the gear adjustment disk (24) of the gear adjustment disk assembly (4), and a gear adjustment lifting seat (20) is provided in the middle of the gear adjustment disk. The gear adjustment lifting seat is connected to the gear adjustment disk as a whole. A lower step surface at the ring surface at the top of the gear adjustment lifting seat is provided with three equally spaced and raised arc ribs (2001), one end of each of the arc ribs is higher than the other end. The arc ribs of the gear adjustment lifting seat abut against three equally spaced and raised upper step surfaces (19011) exposed at the bottom of the lower grinding knife assembly (19) at the bottom of the grinding knife assembly lower cover (18) of the upper grinding knife assembly (3), and one end of each of the upper step surfaces corresponding to the arc ribs is lower than the other end. A balancing spring is provided at the screw at the connection between the grinding knife assembly of the lower grinding knife assembly and the lower grinding knife assembly cover (18), and the gear adjustment disk drives the lower grinding knife assembly to move up and down through the rotation of the dial portion.

5. The detachable straight-through coffee machine grinding device according to claim 1, characterized in that The gear adjustment disk (24) of the gear adjustment disk assembly (4) is provided with teeth (2403) distributed at equal intervals on one side of the top plate opening, and the teeth are meshed with a driving gear (2501) at a potentiometer (25) on one side of the bottom of the lower cover (18) of the upper bean grinding assembly (3), wherein the potentiometer comprises a PCB board, a driving gear and a fixing bracket, and the PCB board of the potentiometer is provided with an angle sensor for automatically identifying the current gear state according to the rotation angle of the driving gear.

6. The detachable straight-through coffee machine grinding device according to claim 1, characterized in that When the box body (8) of the bean box assembly (1) is arranged in the top groove of the seat body (12) of the bean box seat assembly (2), the bean outlet at the bottom of the box body of the bean box assembly fits with the bean outlet at the bottom of the seat body of the bean box seat assembly, the box opening at the top of the box body is provided with a box cover (5), the bean outlet at the bottom of the box body is provided with a rotating seat (10), a fan-shaped lower bean hole is symmetrically arranged at the bin door (1001) at one end of the rotating seat, the inner diameter of the bin door corresponding to the bean outlet of the box body is provided with a fan-shaped upper bean hole of a corresponding shape, and the bin door of the rotating seat is symmetrical along the top of the disk edge. A raised track bone position (1002) is provided, and the track bones on both sides are respectively provided with fixed blocks (11) that slide along the track bones, and one end of the track bones on both sides is respectively provided with an unlocking groove that bends inwards; when the rotating seat is rotated by a handle (6) at the other end of the box body until the lower bean hole of the rotating seat is aligned with the upper bean hole of the box body, one end of the fixed blocks on both sides of the rotating seat respectively extends out of the locking holes that are connected to the box body and the seat body on both sides, and the fixed blocks are respectively arranged on the track bones on both sides of the rotating seat, and the fixed blocks are respectively fixed to the fixed block grooves on the bottom planes on both sides of the lower bean hole of the box body.

7. The detachable straight-through coffee machine grinding device according to claim 6, characterized in that A limiting column (1003) is provided at the track bone position (1002) on one side of the rotating seat (10), and a raised limiting point (1101) is provided on the bottom plane of one side of the lower bean hole of the box body (8) corresponding to the limiting column; a limiting rib (1004) is provided at the track bone position on the other side of the limiting column of the rotating seat, and a raised limiting piece (1102) is provided on the bottom plane of the other side of the lower bean hole of the box body corresponding to the limiting rib, and the limiting rib is limited between the two limiting pieces.

8. The detachable straight-through coffee machine grinding device according to claim 6, characterized in that The handle (6) at the other end of the rotating seat (10) is provided with a bean-blocking cover (7) which is fitted and fixed to the rod of the rotating seat. The cover opening of the bean-blocking cover increases from the handle to the bottom of the box body (8) and is in a conical shape. The cover opening of the bean-blocking cover is aligned with the oblique surface above the bean outlet of the box body at the bottom of the box body of the bean box assembly (1) and a bean-inlet gap is provided. The bean-blocking cover is fitted and fixed to the flat key surface of the rod of the rotating seat. At the same time, the handle is fixedly installed on the top of the rod of the rotating seat by means of a screw (9), and one side of the outer diameter of the handle is tilted in an L shape.

9. The detachable straight-through coffee machine grinding device according to claim 6, characterized in that One end of the fixing block (11) of the track bone position (1002) on one side of the rotating seat (10) extends out of the lock hole at the seat body (12) of the bean box seat assembly (2). At the same time, the fixing block triggers the first safety switch (13) through the top rod (2701) of the top rod assembly (27) arranged on the outer diameter of the seat body. The first safety switch is arranged on the outer diameter side of the shell of the top rod assembly. The outer diameter of the top rod of the shell of the top rod assembly is provided with a top rod spring (2702).

10. The detachable straight-through coffee machine grinding device according to claim 1, characterized in that The gearbox assembly at the motor (16) is a planetary gearbox assembly (15). The motor shaft at the horizontally arranged motor is connected to the reduction gear assembly in the planetary gearbox assembly. The bevel gear extending from one end of the planetary gearbox assembly meshes with the helical gear ring at the upper grinding drive disk (1701) of the upper grinding assembly (17). The upper grinding drive disk is provided with a concave grinding knife. The upper teeth of the inner diameter of the concave grinding knife mesh with the lower teeth at the bottom of the outer diameter conical surface of the bean grinding cone knife (1902) of the lower grinding assembly (19) in the opposite direction. When the planetary gearbox assembly drives the concave grinding knife to rotate and grind beans through the bean grinding drive disk, the bean grinding cone knife does not move. The upper and lower ends of the upper grinding drive disk are respectively provided with bearings. The bottom of the upper grinding drive disk of the upper grinding assembly is provided with a flexible sealing ring (1702). The planetary gearbox assembly, the motor and the upper cover (14) of the bean grinding assembly constitute a motor drive assembly.

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