Detachable straight-through bean grinding device for coffee machine

Abstract

A detachable straight-through bean grinding device for a coffee machine, aiming to solve the technical problems of similar products relating to coffee powder being prone to accumulation and clogging due to the lack of straight-through passages in existing grinding assemblies, and cleaning inside the straight-through passages being inconvenient. A straight-through passage is provided in a bean grinding assembly (3) of the bean grinding device for a coffee machine, and a bean-grinding conical burr adjusting disc (1901) of a lower burr assembly (19) is perforated at its central hole. When the bean grinding assembly (3) is arranged at a powder outlet of the coffee machine, a passage opening at one end of the straight-through passage at the bottom of the bean grinding assembly (3) and the end surface of the bottom of the bean grinding assembly (3) extend out of the opening of the powder outlet of the coffee machine; an assembly button (22) extending from one side of a gear adjusting disc (24) of a gear adjusting disc assembly (4) is aligned with an indicator mark at the outer diameter of the powder outlet of the coffee machine; and by means of pressing the assembly button (22), notches of an inner fastening ring (2401) in the gear adjusting disc (24) are fitted with mounting protrusions (1801) on the outer end surface of the straight-through passage at the bottom of the bean grinding assembly (3) and are fastened to same by means of rotation.

Description

Detachable straight-through coffee grinder

[0001] Citation of relevant applications

[0002] This invention claims priority to Chinese Patent Application No. 202411631024.7, filed on November 15, 2024, entitled "Detachable Straight-Through Coffee Maker Grinding Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to a coffee grinder for a coffee machine, specifically a detachable, direct-flow coffee grinder. Background Technology

[0004] A coffee machine is an electrical appliance used for making coffee. They are generally divided into semi-automatic and fully automatic types. Semi-automatic coffee machines require manual operation for grinding, tamping, filling, brewing, and cleaning up coffee grounds. Fully automatic coffee machines are fully automated, controlling the entire coffee brewing process from preheating and cleaning to grinding, tamping, brewing, and dispensing. They brew coffee according to scientific data and procedures, requiring only the touch of a button. In existing coffee machines, the coffee bean grinding device typically uses an indirect dispensing method. This involves collecting the ground coffee powder in a container and then conveying it to the brewing section of the machine through pipes or other means. This method has several problems, such as the tendency for coffee powder to accumulate and clog, affecting grinding efficiency and coffee quality. Clogged or blocked channels cannot be cleaned or unblocked, requiring disassembly of the entire machine and the brewing unit. Furthermore, the indirect dispensing method requires additional components and space, increasing the complexity and cost of the coffee machine. Therefore, a new direct-dispensing coffee bean grinding device is needed to improve the performance and reliability of coffee machines. Some existing coffee machines have detachable grinding components, such as Chinese patent application number 200480010958.3, published on May 24, 2006, entitled "Coffee Grinder with Detachable Box"; and another example is Chinese patent application number 202220894983.8, authorized on October 28, 2022, entitled "Coffee Bean Grinder". However, the above products and similar products mainly involve the disassembly of the bean box assembly or the complete disassembly of the grinding assembly. The installation of the disassembled bean box is inconvenient, and the stability after installation is difficult to guarantee. The installation of the complete disassembled grinding assembly is also inconvenient, and the grinding fineness is difficult to adjust precisely, resulting in poor grinding stability. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a detachable straight-through coffee grinder device that solves the technical problems of existing similar products lacking a straight-through channel design in the grinding assembly, which easily leads to the accumulation and blockage of coffee powder, and the inconvenience of cleaning the straight-through channel; the lack of a detachable structure design in the lower grinding assembly; and the poor design of the detachable structure design of the bean hopper assembly, resulting in inconvenient operation. This objective is achieved through the following technical solution.

[0006] A detachable, direct-flow coffee grinder is disclosed. The bean hopper assembly is housed within a recessed area at the top of the bean hopper base assembly, which is integrally formed. A grinding assembly is located at the bottom of the bean hopper base assembly, and this grinding assembly includes a direct-flow channel. An upper and lower grinding blade assembly are housed within a grinding chamber formed by the engagement of the upper and lower covers of the grinding assembly. A motor on one side of the upper cover drives the upper grinding blade assembly via a gearbox assembly, which in turn drives the lower grinding blade assembly. The lower grinding blade assembly has a perforated center hole at the adjustment disc of its grinding cone. A key structural design feature is that when the grinding assembly is positioned at the coffee machine's powder outlet, one end of the direct-flow channel at the bottom of the grinding assembly and the bottom end face of the grinding assembly extend beyond the coffee machine's powder outlet. The other end of the direct-flow channel at the top of the grinding assembly... The end channel opening and the bean outlet hole at the bottom of the bean container assembly are sealed together. The bean container assembly is fixed inside the coffee machine by the snap-fit ​​rib on the outer diameter of the base. At the same time, the grinding assembly is fixed inside the coffee machine by the base of the bean container assembly. The button on one side of the gear adjustment plate of the gear adjustment plate assembly is aligned with the indicator mark on the outer diameter of the coffee machine's powder outlet. When the bottom of the grinding assembly protruding from the powder outlet of the coffee machine is pressed, the notch between the inner rings of the snap-fit ​​in the gear adjustment plate engages with the mounting protrusion on the outer end face of the straight leakage channel at the bottom of the grinding assembly. By rotating the gear adjustment plate assembly, the inner ring of the snap-fit ​​in the gear adjustment plate assembly engages with the mounting protrusion of the grinding assembly. The gear adjustment plate assembly is installed and fixed at the bottom of the grinding assembly. One end of the button installed in the gear adjustment plate is located at one of the notches in the inner ring of the snap-fit ​​in the gear adjustment plate. The aforementioned bean hopper assembly is a detachable assembly. Specifically, this is achieved by simultaneously retracting and sliding the fixing block of the rotating seat through the handle inside the hopper assembly and through the locking hole at the hopper assembly's housing and the locking hole at the hopper base assembly's seat. Simultaneously, by disassembling the gear adjustment dial assembly, the lower grinding blade assembly of the coffee machine's grinding device can be cleaned. Furthermore, the lower grinding blade assembly can be disassembled according to the following structure to better clean the straight-through channels within both the lower and upper grinding blade assemblies. The bottom of the aforementioned straight-through channel is located at the powder outlet connecting the grinding assembly and the coffee machine, allowing the ground coffee powder to fall vertically and directly into the powder receiving position, preventing clogging.

[0007] The grinding cone blade of the lower grinding blade assembly is connected and fixed to the grinding cone blade adjustment disc via a connecting shaft. The outer diameter of the grinding adjustment disc at the bottom of the grinding cone blade has equidistantly spaced and protruding mounting ears. The grinding cone blade adjustment disc and mounting ears are installed into the channel opening of the straight leakage channel at the bottom of the lower cover of the grinding assembly, and into the ear groove communicating with the bottom outer end face of the channel opening at the bottom of the straight leakage channel at the bottom of the lower cover of the grinding assembly, using screws at the mounting ears. This is a further detachable lower grinding blade assembly; that is, when clogged or not used for a long time, after removing the gear adjustment disc assembly, the lower grinding blade assembly can be further removed to clean the entire internal grinding channel.

[0008] The bottom of the lower cover of the grinding assembly above the assembly button is equipped with a second safety switch. When the gear adjustment plate assembly is installed and fixed to the bottom of the grinding assembly, the assembly button triggers the second safety switch.

[0009] The gear shift adjustment disc assembly has a raised lever on one side of its outer diameter. A gear shift adjustment lifting seat is located in the center of the gear shift adjustment disc, and the gear shift adjustment lifting seat is integrated with the gear shift adjustment disc. Three equidistant, raised arc-shaped ribs are provided on the lower stepped surface of the top ring of the gear shift adjustment lifting seat. One end of each arc-shaped rib is higher than the other. The arc-shaped ribs of the gear shift adjustment lifting seat abut against three equidistant, raised upper stepped surfaces protruding from the bottom of the grinding blade assembly's lower cover of the upper grinding assembly. One end of each upper stepped surface corresponding to the arc-shaped rib is lower than the other. A balance spring is provided at the connection between the grinding blade assembly's lower cover and the grinding blade assembly's lower part. The gear shift adjustment disc rotates via the lever, causing the lower grinding blade assembly to move up and down.

[0010] The gear adjustment disc assembly has equidistantly distributed teeth on one side of the top opening of the gear adjustment disc. The teeth mesh with the drive gear at the potentiometer on the bottom side of the lower cover of the upper grinding assembly. The potentiometer includes a PCB board, a drive gear, and a fixed bracket. The PCB board of the potentiometer is equipped with an angle sensor that automatically identifies the current gear position by rotating through the drive gear.

[0011] When the bean box assembly is placed in the groove at the top of the bean box base assembly, the bean outlet at the bottom of the bean box assembly fits into the bean outlet at the bottom of the bean base assembly. The top of the bean box is covered, and the bottom of the bean outlet is fitted with a rotating base. A fan-shaped lower bean hole is symmetrically provided on the disc at one end of the rotating base door. The inner diameter of the disc at the bean outlet of the bean box corresponding to the fan-shaped upper bean hole is provided. The top edge of the disc at the disc at the rotating base door is symmetrically provided with raised track ribs. Fixed blocks that slide along the track ribs are provided on both sides of the track ribs. Unlocking grooves that bend inward are provided at one end of each track rib. When the rotating base is rotated by the handle at the other end of the bean box until the lower bean hole of the rotating base is aligned with the upper bean hole of the bean box, one end of the fixed blocks on both sides of the rotating base extends out of the lock holes that connect the two sides of the bean box and the base. The fixed blocks are respectively provided on the track ribs on both sides of the rotating base and are fixed to the fixed block grooves on the bottom plane of the lower bean hole on both sides of the bean box.

[0012] A limiting post is provided at the track bone position on one side of the rotating seat, and a protruding limiting point is provided on the bottom plane of the lower bean hole side of the box corresponding to the limiting post.

[0013] The rotating seat has a limiting rib on the opposite side of the track bone position of the limiting column. The bottom plane of the box corresponding to the limiting rib is symmetrically provided with a protruding limiting piece on the other side of the lower bean hole. The limiting rib is limited between the two limiting pieces.

[0014] At the other end of the rotating seat, there is a bean-blocking cover that fits and is fixed to the rod of the rotating seat. The opening of the bean-blocking cover increases in size from the handle towards the bottom of the box and is conical. The opening of the bean-blocking cover is aligned with the bean outlet above the bottom of the bean box assembly and has a bean inlet gap. While the bean-blocking cover fits and is fixed to the flat key surface of the rod of the rotating seat, the handle is fixed to the top of the rod of the rotating seat by screws. The outer diameter side of the handle is L-shaped and raised.

[0015] At the same time, one end of the fixing block of the track bone position on one side of the rotating seat extends out of the locking hole at the seat body of the bean box seat assembly. Simultaneously, the fixing block triggers the first safety switch through the push rod of the push rod assembly located on the outer diameter of the seat body. The first safety switch is located on the outer diameter side of the shell of the push rod assembly, and a push rod spring is provided on the outer diameter of the push rod inside the shell of the push rod assembly. On the other side of the aforementioned push rod assembly, symmetrically located on the other side, a bracket support is provided on the outer diameter of the locking hole at the seat body of the bean box seat assembly. When the fixing block on this side extends, it is inserted into the bracket support.

[0016] The gearbox assembly at the motor is a planetary gearbox assembly. The motor shaft at the horizontally positioned motor is connected to the reduction gear assembly inside the planetary gearbox assembly. A bevel gear extending from one end of the planetary gearbox assembly meshes with the helical gear ring at the upper grinding blade drive disk of the upper grinding blade assembly. The upper grinding blade drive disk is equipped with a concave grinding blade. The upper cutting teeth on the inner diameter of the concave grinding blade mesh in the opposite direction with the lower cutting teeth at the bottom of the outer diameter conical surface of the grinding cone blade of the lower grinding blade assembly. When the planetary gearbox assembly drives the concave grinding blade to rotate through the bevel gear and the upper grinding blade drive disk to grind beans, the grinding cone blade remains stationary. Bearings are respectively provided at the upper and lower ends of the upper grinding blade drive disk. A flexible sealing ring is provided at the bottom end of the upper grinding blade drive disk of the upper grinding blade assembly. The aforementioned planetary gearbox assembly, motor, and upper cover of the grinding blade assembly constitute the motor drive assembly.

[0017] The bean box holder assembly has a raised platform edge on one side of the groove at the top of the seat body. The platform edge has a side groove at the bottom sloping corner of the bean box assembly. The side groove of the bean box body is inserted into the platform edge of the seat body, and the outer diameter of the bean box body is flush with the outer diameter of the seat opening of the seat body.

[0018] The present invention has a reasonable structural design, and the bean box assembly, gear adjustment plate assembly and lower grinding blade assembly are easy to install and remove. The upper and lower grinding blades of the grinding assembly are easy to clean. In particular, the straight leakage channel inside the grinding assembly is easy to clean, and it is not easy to cause coffee powder accumulation and blockage. It is suitable as a detachable straight-through coffee machine grinding device, as well as a structural improvement of similar products. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the exploded structure of the main components of the present invention.

[0020] Figure 2 is a further partial exploded structure diagram of Figure 1.

[0021] Figure 3 is a schematic diagram of the assembled three-dimensional structure of Figure 1, with part A defined in the figure.

[0022] Figure 4 is an enlarged view of part A in Figure 3.

[0023] Figure 5 is a cross-sectional view of the fixed block in Figure 3.

[0024] Figure 6 is a schematic diagram of the bottom structure of the bean box assembly in Figure 3 after it has been removed. Part B in the figure is outlined.

[0025] Figure 7 is an enlarged view of part B in Figure 6. The dashed line in the figure represents the shell structure of the push rod assembly.

[0026] Figure 8 is a schematic diagram of the bottom structure after the bean box component in Figure 6 is removed.

[0027] Figure 9 is a schematic diagram of the bottom structure of the box in Figure 8 after the box body is omitted.

[0028] Figure 10 is an enlarged structural diagram of the fixed block and rotating seat combination in Figure 2.

[0029] Figure 11 is a schematic diagram of the bottom structure of the gear shift adjustment panel assembly in Figure 3 in the open state.

[0030] Figure 12 is a schematic diagram of the bottom structure of the grinding assembly after the lower cover of Figure 11 is removed. The lower cover of the grinding assembly and the speed adjustment plate assembly are omitted in the figure.

[0031] Figure 13 is a partial structural diagram of the gear shift adjustment disc assembly in Figure 11 before installation.

[0032] Figure 14 is a partial structural diagram of the gear shift adjustment panel assembly of Figure 13 after installation.

[0033] Attached Figure Numbers and Names: 1. Bean Box Assembly, 2. Bean Box Base Assembly, 3. Grinding Assembly, 4. Gear Adjustment Disc Assembly, 5. Lid, 6. Handle, 7. Bean Stop Cover, 8. Container Body, 9. Screw, 10. Rotating Seat, 1001. Door, 1002. Track Rib, 1003. Limiting Post, 1004. Limiting Rib, 11. Fixing Block, 1101. Limiting Point, 1102. Limiting Plate, 12. Seat Body, 1201. Buckle Rib, 13. First Safety Switch, 14. Grinding Assembly Top Cover, 15. Planetary Gear Box Assembly, 16. Motor, 17. Upper Grinding Blade Assembly, 1701. Upper Grinding Blade Drive Disc 1702. Flexible sealing ring; 18. Lower cover of grinding assembly; 1801. Mounting buckle; 19. Lower grinding blade assembly; 1901. Grinding conical blade adjustment disc; 19011. Upper stepped surface; 1902. Grinding conical blade; 20. Gear adjustment lifting seat; 2001. Arc rib; 21. Fixed pressure plate; 22. Assembly button; 23. Adjustment feedback contact; 24. Gear adjustment disc; 2401. Snap-in inner ring; 2402. Toggle; 2403. Toothed edge; 25. Potentiometer; 2501. Drive gear; 26. Second safety switch; 27. Push rod assembly; 2701. Push rod; 2702. Push rod spring. Detailed Implementation

[0034] The structure and use of the present invention will now be further described with reference to the accompanying drawings. As shown in Figures 1-14, the bean hopper assembly 1 of the coffee machine grinding device is disposed in the groove at the top of the seat 12 of the bean hopper base assembly 2. The bean hopper assembly and the bean hopper base assembly are integrated. The bottom of the bean hopper base assembly is provided with a grinding assembly 3. The grinding assembly has a straight leakage channel. The grinding chamber formed by the upper cover 14 and the lower cover 18 of the grinding assembly is provided with an upper grinding blade assembly 17 and a lower grinding blade assembly 19. The motor 16 on one side of the upper cover of the grinding assembly drives the upper grinding blade assembly to rotate through the gearbox assembly. The upper grinding blade assembly drives the lower grinding blade assembly to rotate. The center hole of the grinding cone blade adjustment plate 1901 of the lower grinding blade assembly has a hollow hole. When the grinding assembly is installed at the coffee machine's powder outlet, one end of the straight-through channel at the bottom of the grinding assembly and the opening at the coffee machine's powder outlet on the bottom end face of the grinding assembly are sealed against each other. The other end of the straight-through channel at the top of the grinding assembly is sealed against the opening at the bottom of the bean container assembly's base. A snap-fit ​​rib 1201 on the outer diameter of the bean container assembly's base is fixed inside the coffee machine. Simultaneously, the grinding assembly is fixed inside the coffee machine via the bean container assembly's base. A button 22 is mounted on one side of the speed adjustment dial 24 extending from the speed adjustment dial assembly, which is connected to the coffee machine's powder outlet. With the indicator marks aligned at the outer diameter, the bottom of the grinder assembly extending from the coffee machine's powder outlet is engaged by pressing the assembly button. The notch between the inner ring 2401 of the gear adjustment dial engages with the mounting protrusion 1801 on the outer end face of the straight leakage channel at the bottom of the grinder assembly. By rotating the gear adjustment dial assembly, the inner ring of the gear adjustment dial assembly engages with the mounting protrusion of the grinder assembly, and the gear adjustment dial assembly is fixedly installed at the bottom of the grinder assembly. One end of the button mounted inside the gear adjustment dial is located at one of the notches in the inner ring of the inner ring of the gear adjustment dial. The grinding cone blade 1902 of the lower grinding blade assembly is connected and fixed to the grinding cone blade adjustment plate via a connecting shaft. The outer diameter of the grinding cone blade adjustment plate at the bottom of the grinding cone blade is provided with equally spaced and protruding mounting ears. The grinding cone blade adjustment plate and the mounting ears are installed in the channel opening of the bottom straight leakage channel of the lower cover of the grinding assembly and in the ear groove that communicates with the bottom end face of the outer side of the channel opening of the bottom straight leakage channel of the lower cover of the grinding assembly via screws at the mounting ears.

[0035] The bottom of the lower cover of the grinding assembly above the assembly button is equipped with a second safety switch 26. When the gear adjustment plate assembly is installed and fixed to the bottom of the grinding assembly, the assembly button triggers the second safety switch. The gear shift adjustment disc assembly has a raised lever 2402 on one side of its outer diameter. A gear shift adjustment lifting seat 20 is located in the center of the gear shift adjustment disc. The gear shift adjustment lifting seat is integrated with the gear shift adjustment disc. Three equidistant, raised arc-shaped ribs 2001 are provided on the lower stepped surface of the top ring of the gear shift adjustment lifting seat. One end of each arc-shaped rib is higher than the other. The arc-shaped ribs of the gear shift adjustment lifting seat abut against three equidistant, raised upper stepped surfaces 19011 exposed at the bottom of the grinding blade assembly's lower cover of the upper grinding assembly. One end of each upper stepped surface is lower than the other of the arc-shaped ribs. A balance spring is provided at the connection between the grinding blade assembly's grinding blade adjustment disc and the lower cover of the grinding assembly. The gear shift adjustment disc rotates via the lever, causing the lower grinding blade assembly to move up and down. The gear shift adjustment panel assembly has equidistantly distributed teeth 2403 on one side of the top opening of the gear shift adjustment panel. The teeth mesh with the drive gear 2501 at the potentiometer 25 on the bottom side of the lower cover of the upper grinding assembly. The potentiometer includes a PCB board, a drive gear, and a fixed bracket. The PCB board of the potentiometer is equipped with an angle sensor that automatically identifies the current gear position by rotating the drive gear.

[0036] When the bean box assembly is placed in the groove at the top of the bean box base assembly, the bean outlet at the bottom of the bean box assembly fits into the bean outlet at the bottom of the bean box base assembly. A cover 5 is provided at the top of the bean box, and a rotating base 10 is provided at the bottom of the bean outlet. A fan-shaped lower bean hole is symmetrically provided on the disc surface at the door 1001 at one end of the rotating base. A corresponding fan-shaped upper bean hole is provided on the inner diameter of the door at the bean outlet of the bean box. A raised rail is symmetrically provided on the top edge of the disc surface at the door of the rotating base. The track rib position 1002 has a fixing block 11 on each side that slides along the track rib. One end of each track rib has an inwardly curved unlocking groove. When the rotating seat is rotated via the handle 6 at the other end of the housing until the lower bead hole of the rotating seat aligns with the upper bead hole of the housing, one end of each fixing block extends out of the housing and the locking holes on both sides of the seat. The fixing blocks are respectively positioned on the track ribs on both sides of the rotating seat and are fixed to the fixing block grooves on the bottom plane of the lower bead hole on both sides of the housing. A limiting post 1003 is provided on one side of the track rib of the rotating seat. A protruding limiting point 1101 is provided on the bottom plane of the lower bead hole on the side of the housing corresponding to the limiting post. A limiting rib 1004 is provided on the track rib symmetrically on the other side of the limiting post of the rotating seat. A protruding limiting piece 1102 is provided symmetrically on the bottom plane of the lower bead hole on the other side of the housing corresponding to the limiting rib. The limiting rib is positioned between the two limiting pieces.

[0037] At the other end of the rotating seat, a bean-blocking cover 7 is provided at the handle, which is fitted and fixed to the rod of the rotating seat. The opening of the bean-blocking cover increases in size from the handle towards the bottom of the box, forming a conical shape. The opening of the bean-blocking cover is aligned with the bean outlet above the bottom of the bean box assembly, providing a bean inlet gap. While the bean-blocking cover is fitted and fixed to the flat key surface of the rod of the rotating seat, the handle is fixed to the top of the rod of the rotating seat by screws 9. The outer diameter side of the handle is L-shaped and protrudes. At the same time, one end of the fixing block of the track bone position on one side of the rotating seat extends out of the locking hole at the seat body of the bean box assembly. The fixing block triggers the first safety switch 13 through the top rod 2701 of the top rod assembly 27 on the outer diameter of the seat body. The first safety switch is located on the outer diameter side of the housing of the top rod assembly. A top rod spring 2702 is provided on the outer diameter of the top rod inside the housing of the top rod assembly.

[0038] The gearbox assembly at the aforementioned motor is a planetary gearbox assembly 15. The motor shaft at the horizontally mounted motor is connected to the reduction gear assembly inside 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 blade drive disk 1701 of the upper grinding blade assembly. The upper grinding blade drive disk is equipped with a concave grinding blade. The upper cutting teeth on the inner diameter of the concave grinding blade mesh in the opposite direction with the lower cutting teeth at the bottom of the outer diameter conical surface of the grinding cone blade 1902 of the lower grinding blade assembly. When the planetary gearbox assembly drives the concave grinding blade to rotate through the bevel gear and the upper grinding blade drive disk to grind beans, the grinding cone blade remains stationary. Bearings are respectively provided at the upper and lower ends of the upper grinding blade drive disk. A flexible sealing ring 1702 is provided at the bottom end of the upper grinding blade drive disk of the upper grinding blade assembly. The aforementioned planetary gearbox assembly, motor, and upper cover of the grinding blade assembly constitute the motor drive assembly. The bean box holder assembly has a raised platform edge on one side of the groove at the top of the seat body. The platform edge has a side groove at the bottom sloping corner of the bean box assembly. The side groove of the bean box body is inserted into the platform edge of the seat body, and the outer diameter of the bean box body is flush with the outer diameter of the seat opening of the seat body.

[0039] This coffee machine grinding device is a coffee bean grinding device for coffee machines with a direct-falling coffee ground. The coffee machine grinding device includes: a bean box assembly, a bean box base assembly, a grinding assembly, and a speed adjustment dial assembly.

[0040] The detachable bean hopper assembly is a bean hopper unit that is fixed to the top of the machine by rotation. The hopper body is made of food-grade material and has a certain capacity for storing coffee beans. The shape and size of the hopper body match the main body of the coffee machine, ensuring a secure installation and easy disassembly. The hopper lid has a sealing structure, and a sealing structure is also installed at the connection between the hopper body and the lid to prevent coffee bean leakage and moisture ingress. The coffee bean leakage prevention structure of the bean hopper assembly is as follows: rotating the handle 90° causes the rotating base to rotate simultaneously, causing the two side fixing blocks to extend and retract, controlling the fixing of the hopper and preventing bean leakage, as well as unlocking and stopping coffee bean leakage. Furthermore, when the fixing blocks extend, they will press against the first safety switch, preventing the machine from starting the grinding device without the hopper being inserted and locked. This structure is simple to operate and safe and stable.

[0041] The grinding assembly consists of two mating discs: a fixed disc and a rotating disc, namely the upper and lower grinding blade assemblies. The biggest difference between this unit and traditional grinding discs is that this one is fixed in opposite directions; adjusting the coffee grind size involves the rotating grinding cone. Traditional methods involve the grinding cone being fixed to the motor shaft, with the conical grinding blade rotating to adjust the grind size. The grinding discs are made of high-hardness 420 stainless steel to ensure long-term use. The surface of the grinding discs has a specific texture to improve grinding efficiency and uniformity of fineness. The lower grinding blade assembly can be removed from the machine for easy cleaning and descaling. The grinding assembly is driven by a motor-driven planetary gearbox assembly connected to the rotating grinding discs, providing them with power. The motor has sufficient power and a stable speed to ensure optimal grinding results. The grinding assembly's adjustment mechanism is used to adjust the gap between the grinding discs, thereby controlling the fineness of the coffee powder. Traditional grinding devices use threaded connections to adjust the gap between the grinding discs; the grinding assembly's adjustment mechanism can be manual, allowing users to easily adjust it according to their needs, or it can be combined with a potentiometer to identify the adjustment level and automatically allocate grinding time. The grinding assembly's direct-fall powder discharge channel is perpendicularly connected to the grinding structure and the coffee machine's powder outlet, used to directly deliver the ground coffee powder to the powder receiving position, eliminating the need for a secondary powder feeding structure and secondary channel conveying.

[0042] The aforementioned fixing blocks retract and lock the movement track. When the fixing blocks are locked to the main body, the flow between the rotating seat and the bean hopper is unobstructed, allowing beans to be dispensed. When the fixing blocks extend, they engage with the main body to lock, and push the connector of the push rod assembly's push rod proximity switch to trigger the first safety switch. The aforementioned fixing blocks are respectively located on the track ribs on both sides of the rotating seat. When the handle is rotated counterclockwise, the track ribs of the rotating seat cause the fixing blocks to retract, closing the channel between the rotating seat and the bean hopper assembly to prevent coffee beans from scattering when the bean hopper assembly is removed; removing the handle upwards removes the bean hopper assembly from the housing. Rotating the handle clockwise causes the fixing blocks to slide out along the guide rail shape at the track ribs of the rotating seat, engaging and fixing with the housing of the bean hopper assembly and the seat of the bean hopper assembly, and activating the first safety switch, opening the channel between the rotating seat and the bean hopper assembly for normal bean dispensing.

[0043] The upper and lower bearings of the grinding assembly reduce the resistance of the upper grinding blade assembly when the motor drives the upper grinding blade drive disc, making the upper grinding blade assembly drive more stable and smooth. The concave upper grinding blade inside the grinding blade assembly is fixed and rotates within the upper grinding blade drive disc. The flexible sealing ring prevents bean powder from entering other spaces in the grinding system during the high-speed rotation of the upper and lower grinding blade assemblies. The grinding cone blade adjustment disc and the gear adjustment lifting seat have a stepped surface that rotates in coordination. The stepped surface changes the gap between the upper and lower grinding blades according to the direction of rotation, thereby changing the coarseness of the grind. That is, the lower grinding blade assembly fits with the lower cover of the grinding assembly and is fixedly connected by a balance spring, making it removable; the grinding cone blade is connected and fixed to the grinding adjustment disc via a connecting shaft; the balance spring is fixed on the grinding adjustment disc and connected to the lower cover of the grinding assembly, used to balance and control the stability of the lower grinding blade assembly when the upper and lower grinding blade assemblies rotate to adjust the gap. The lower grinding disc assembly features a perforated design on the grinding cone adjustment disc, allowing coffee grounds to fall vertically to the receiving position.

[0044] The installation instructions for the gear shift dial assembly are as follows: Align the gear shift dial assembly with the indicator mark, insert it all the way up, then rotate it approximately 10 degrees to the left and release the assembly button to secure it; align the gear shift dial assembly with the indicator mark, press the gear shift dial assembly, and then pull it down to remove it. Specifically, the coffee machine has a triangular arrow indicator on the left side of the main body near the powder outlet. Rotate the gear shift dial assembly until the assembly button aligns with this indicator mark, then press the assembly button, insert the bracket upwards, rotate it approximately 10 degrees to the left, and release the assembly button to complete the installation. Conversely, rotate the gear shift dial assembly to the indicator mark, press the assembly button, and then pull it down to remove the gear shift dial assembly.

[0045] Meanwhile, the second safety switch of the gear shift adjustment panel assembly is used to detect whether the gear shift adjustment panel assembly is installed correctly to prevent accidents. When the gear shift lever is rotated, the gear shift adjustment lifting seat will also rotate simultaneously, and the stepped surface that mates with the grinding disc will rise or fall, thereby adjusting the gap between the upper and lower parts of the grinding disc. When installing the gear shift adjustment panel assembly, the assembly button must be pressed and engaged with the bracket before it can be installed. During the left and right adjustment of the gear shift adjustment panel, the drive gear on the edge of the potentiometer rotates; the PCB board automatically identifies the current gear position based on the angle of rotation of the drive gear and automatically adjusts the grinding time accordingly. When the gear shift adjustment panel rotates to the left, it stops rotating when the assembly button contacts the bracket indicated by the blue arrow; this is the lowest gear. When the gear shift adjustment panel rotates to the right, it stops rotating when the assembly button contacts the bracket indicated by the blue arrow; this is the highest gear.

[0046] The gear shift dial assembly is used to adjust the gap between the upper and lower grinding discs, thereby controlling the fineness of the coffee grounds. The gear shift dial assembly uses a manual lever mechanism for easy adjustment according to user needs, and a potentiometer is included for automatic gear detection and automatic adjustment of grinding time. Specifically, when the gear shift dial is turned to the right, the lower grinding disc assembly rises, the gap between the two discs decreases, and the ground coffee becomes finer; conversely, turning it upwards lowers, the gap between the discs increases, and the ground coffee becomes finer. In other words, adjusting the gear shift dial to the left moves the lower grinding disc assembly downwards, increasing the gap between the discs; adjusting the gear shift dial to the right moves the lower grinding disc assembly upwards, decreasing the gap between the discs.

Claims

1. A detachable direct-flow coffee grinder, wherein the bean hopper assembly (1) of the coffee grinder is disposed in the groove at the top of the seat (12) of the bean hopper base assembly (2), the bean hopper assembly and the bean hopper base assembly are integrated, the bottom of the bean hopper base assembly is provided with a grinding assembly (3), the grinding assembly is provided with a direct-flow channel, the grinding chamber formed by the upper cover (14) and the lower cover (18) of the grinding assembly are provided with an upper grinding blade assembly (17) and a lower grinding blade assembly (19), the motor (16) on one side of the upper cover of the grinding assembly drives the upper grinding blade assembly to rotate through the gearbox assembly, the upper grinding blade assembly drives the lower grinding blade assembly to rotate, and the center hole of the grinding cone blade adjustment plate (1901) of the lower grinding blade assembly is provided with a hollow hole; characterized in that When the grinding assembly (3) is installed at the coffee machine's powder outlet, one end of the straight-through channel at the bottom of the grinding assembly and the hole at the coffee machine's powder outlet on the bottom end face of the grinding assembly are sealed against each other. The other end of the straight-through channel at the top of the grinding assembly is sealed against the hole at the bottom of the bean container assembly (2). The bean container assembly's outer diameter is fixed inside the coffee machine by a snap-fit ​​rib (1201). At the same time, the grinding assembly is fixed inside the coffee machine through the bean container assembly's body. A button (22) is installed on one side of the gear adjustment dial (24) extending out of the gear adjustment dial assembly (4). Aligning with the indicator mark on the outer diameter of the coffee machine's powder outlet, the bottom of the grinding assembly, extending out of the coffee machine's powder outlet, engages with the mounting protrusion (1801) on the outer end face of the straight leakage channel at the bottom of the grinding assembly by pressing the assembly button. Then, rotating the gear adjustment dial assembly causes the inner ring of the gear adjustment dial assembly to engage with the mounting protrusion of the grinding assembly, thus fixing the gear adjustment dial assembly to the bottom of the grinding assembly. One end of the button mounted on the gear adjustment dial is located at one of the notches in the inner ring of the gear adjustment dial.

2. The demountable through-flow coffee grinder for a coffee maker according to claim 1, characterized in that The grinding cone blade (1902) of the lower grinding blade assembly (19) is connected and fixed to the grinding cone blade adjustment plate (1901) via a connecting shaft. The outer diameter of the grinding cone blade adjustment plate at the bottom of the grinding cone blade is provided with equidistant and protruding mounting ears. The grinding cone blade adjustment plate and the mounting ears are installed in the channel opening of the bottom straight leakage channel of the lower cover (18) of the grinding assembly and in the ear groove that communicates with the bottom end face of the channel opening of the bottom straight leakage channel of the lower cover of the grinding assembly via screws at the mounting ears.

3. The demountable through-flow coffee grinder for a coffee maker according to claim 1, characterized in that The bottom of the lower cover (18) of the grinding assembly of the grinding assembly (3) above the assembly button (22) is provided with a second safety switch (26). When the gear adjustment plate assembly (4) is installed and fixed at the bottom of the grinding assembly, the assembly button triggers the second safety switch.

4. The demountable through-flow coffee grinder of claim 1, wherein The gear adjustment disc assembly (4) has a protruding lever (2402) on one side of the outer diameter of the gear adjustment disc (24). The gear adjustment disc has a gear adjustment lifting seat (20) in the middle. The gear adjustment lifting seat is integrated with the gear adjustment disc. The lower step surface of the top ring of the gear adjustment lifting seat has three equidistant and protruding arc-shaped ribs (2001). One end of the arc-shaped ribs is higher than the other end. The arc-shaped ribs of the gear adjustment lifting seat abut against the three equidistant and protruding upper step surfaces (19011) exposed at the bottom of the grinding blade assembly (19) of the lower cover (18) of the upper grinding assembly (3). One end of the upper step surface corresponding to the arc-shaped ribs is lower than the other end. The screw at the connection between the grinding blade assembly of the lower grinding blade assembly and the lower cover (18) of the grinding assembly is equipped with a balance spring. The gear adjustment disc rotates through the lever to drive the lower grinding blade assembly to move up and down.

5. The removable through-the-bean coffee grinder for a drip coffee maker of claim 1, wherein The gear adjustment disc assembly (4) has equidistantly distributed teeth (2403) on one side of the top disc opening of the gear adjustment disc (24). The teeth mesh with the drive gear (2501) at the bottom of the potentiometer (25) on one side of the lower cover (18) of the upper grinding assembly (3). The potentiometer includes a PCB board, a drive gear and a fixed bracket. The PCB board of the potentiometer is provided with an angle sensor that automatically identifies the current gear position by rotating through the drive gear.

6. The removable through-the-bean coffee grinder for a drip coffee maker of claim 1, wherein When the housing (8) of the bean box assembly (1) is placed in the groove at the top of the seat (12) of the bean box base assembly (2), the bean outlet of the bottom inner body of the bean box assembly fits into the bean outlet of the bottom inner body of the bean box base assembly. The top of the housing is provided with a housing cover (5), and the bottom inner body of the housing is provided with a rotating seat (10). At the door (1001) at one end of the rotating seat, the plate surface is symmetrically provided with a fan-shaped lower bean hole. The inner diameter of the door corresponding to the bean outlet of the housing is provided with a fan-shaped upper bean hole of the same shape. The top edge of the plate surface at the door of the rotating seat is symmetrical. The device is provided with a raised track rib (1002), and each of the two track ribs is provided with a fixing block (11) that slides along the track rib. Each of the two track ribs is provided with an inwardly curved unlocking groove. When the rotating seat is rotated by the handle (6) at the other end of the box until the lower bean hole of the rotating seat is aligned with the upper bean hole of the box, one end of the fixing block on both sides of the rotating seat extends out of the lock hole that is connected to both sides of the box and the seat. The fixing blocks are respectively set on the track ribs on both sides of the rotating seat, and the fixing blocks are respectively fixed to the fixing block grooves on the bottom plane of the lower bean hole on both sides of the box.

7. The demountable through-flow coffee grinder for a coffee maker according to claim 6, characterized in that A limiting post (1003) is provided at the track bone position (1002) on one side of the rotating seat (10), and a protruding limiting point (1101) is provided on the bottom plane of the lower bean hole side of the box (8) corresponding to the limiting post; a limiting rib (1004) is provided on the track bone position on the other side of the limiting post of the rotating seat, and a protruding limiting piece (1102) is provided on the bottom plane of the lower bean hole side of the box corresponding to the limiting rib, and the limiting rib is limited between the two limiting pieces.

8. The demountable through-flow coffee grinder of claim 6, wherein The handle (6) at the other end of the rotating seat (10) is provided with a bean-blocking cover (7) that fits and is fixed to the rod of the rotating seat. The opening of the bean-blocking cover increases in size from the handle toward the bottom of the box (8) and is conical. The opening of the bean-blocking cover is aligned with the bean outlet above the bottom of the box of the bean box assembly (1) and has a bean inlet gap. The bean-blocking cover fits and is 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). The outer diameter side of the handle is raised in an L-shape.

9. The demountable through-flow coffee grinder of claim 6, wherein At the same time, the fixing block (11) of the track bone position (1002) on one side of the rotating seat (10) extends out of the locking hole at the seat body (12) of the bean box seat assembly (2), and the fixing block triggers the first safety switch (13) through the top rod (2701) of the top rod assembly (27) on the outer diameter of the seat body. The first safety switch is located on the outer diameter side of the housing of the top rod assembly, and the outer diameter of the top rod inside the housing of the top rod assembly is provided with a top rod spring (2702).

10. The demountable through-flow coffee grinder of claim 1, wherein The gearbox assembly at the motor (16) is a planetary gearbox assembly (15). The motor shaft at the horizontally mounted motor is connected to the reduction gear assembly inside 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 blade. The upper cutting teeth of the inner diameter of the concave grinding blade mesh in the opposite direction with the lower cutting teeth at the bottom of the outer diameter conical surface of the grinding cone (1902) of the lower grinding assembly (19). When the planetary gearbox assembly drives the concave grinding blade to rotate and grind beans through the bevel gear and the upper grinding drive disk, the grinding cone does not move. The upper and lower ends of the upper grinding drive disk are respectively provided with bearings. The bottom end of the upper grinding drive disk of the upper grinding assembly is provided with a flexible sealing ring (1702). The above-mentioned planetary gearbox assembly, motor and grinding assembly cover (14) constitute the motor drive assembly.

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