A multi-function coffee maker

Abstract

The application discloses a multifunctional coffee machine, which comprises a shell, a grinding device, a powder pressing device and a brewing device arranged in the shell, the grinding device is communicated with the powder pressing device through a downward inclined channel, the brewing device comprises a water tank, a water pump, a heating module and a brewing opening, a metal sleeve is arranged in the grinding device, the metal sleeve can reduce the overall cost, ensure the high precision of the ground powder, prevent static electricity, and prevent powder sticking and flying, the powder pressing device is driven to rotate and move by a driving screw rod and a nut, the nut and the powder pressing part are connected through a guide rod and a compression spring, the powder pressing part is automatically rotated and pushed to press the powder, the elastic force of the compression spring ensures that the powder pressing force is basically constant, and therefore the taste of the brewed coffee is better, and the multifunction and automatic control can be realized from the grinding, the powder pressing to the brewing, the high requirements of the grinding and the powder pressing during the brewing of the coffee are ensured, and the coffee machine is simple, convenient and low in cost.

Description

Technical Field

[0001] This invention belongs to the field of coffee machines, and particularly relates to a multi-functional coffee machine. Background Technology

[0002] Coffee machines can be categorized into many types, including drip, immersion, and espresso machines. The quality of a coffee machine's water supply system, pressure control, temperature control, grinding technology, automation, and intelligent features all affect the taste of the brewed coffee and the user experience. For some types of coffee, such as espresso, pressure is a key factor; the taste and quality of some coffees are greatly affected by water temperature; for coffee machines that use coffee beans, grinding technology is also crucial. High-end coffee machines are typically equipped with professional-grade grinders that can precisely adjust the grind size to meet different taste preferences. With technological advancements, more and more coffee machines are equipped with automation and intelligent functions. Multi-functional coffee machines usually offer multiple ways to brew coffee, such as espresso and Americano. Different coffees require different coffee beans, thus necessitating corresponding grinding and processing technologies to adapt to the characteristics and flavor preferences of different bean varieties; in particular, the requirements for grinding and tamping are high, ultimately affecting the taste of the brewed coffee.

[0003] In the prior art, Chinese patent publication number CN 213757777U discloses a coffee machine that mainly controls the hand crank to pressurize hot water and fully blend it with coffee, but it does not solve problems such as automation, cost and tamping control.

[0004] Therefore, there is an urgent need to provide a multi-functional coffee machine to solve the problems existing in the current technology. Summary of the Invention

[0005] To address the problems of existing technologies, this invention provides a multi-functional coffee machine, which includes a grinding device, a tamping device, and a brewing device. The grinding device has a metal sleeve, which reduces the overall cost while ensuring high precision in grinding the coffee powder and also prevents static electricity, powder sticking, and powder flying. The tamping device rotates and moves the nut by a drive screw. The connection between the nut and the tamping part is achieved through a guide rod and a pressure spring, enabling automatic rotation and pushing of the tamping part to tamp the coffee powder. The elasticity of the pressure spring ensures that the tamping force is basically constant. After tamping, the coffee cup funnel can be directly removed and installed into the brewing device for brewing. This achieves the integrated function of grinding, tamping, and brewing coffee, and also improves the taste of the brewed coffee.

[0006] The technical solution of this invention is implemented as follows:

[0007] A multi-functional coffee machine includes a housing and a grinding device, a tamping device, and a brewing device disposed within the housing. The grinding device is connected to the tamping device via a downward-sloping channel. The brewing device includes a water tank, a water pump, a heating module, and a brewing spout. A powder cup funnel is provided at the brewing spout. The water pump draws water from the water tank, which flows out through the brewing spout. The heating module heats the water. A connecting part is provided at the brewing spout, and the powder cup funnel is movably connected to the brewing spout through the connecting part.

[0008] The grinding device includes a grinding shell and a metal cutting tool, a drive shaft, and a first drive device disposed inside the grinding shell. The grinding shell has a grinding cavity, and the bottom of the grinding cavity has a shaft hole. The drive shaft passes vertically through the shaft hole at the bottom of the grinding cavity, with one end connected to the first drive device outside the grinding cavity and the other end connected to the cutting tool. The bottom of the grinding cavity also has a powder sweeper, with the cutting tool located at the upper end of the powder sweeper and connected to the powder sweeper. The grinding cavity has a discharge port, which communicates with a channel.

[0009] The cutting tool includes a cutting head and a cutting disc surrounding the outer periphery of the cutting head. A metal sleeve surrounds the outer periphery of the cutting disc. The metal sleeve is installed, fixed, and sealed to the inner wall of the grinding chamber by an interference fit and is connected to the cutting disc. The grinding shell is made of plastic, and the metal sleeve is provided with conductive terminals.

[0010] The powder pressing device includes a powder pressing shell, a vertical powder pressing channel inside the powder pressing shell, a screw inside the powder pressing channel, a second driving device outside the powder pressing channel, the second driving device being connected to the screw and driving the screw to rotate, and a powder cup funnel at the end of the powder pressing channel; a feed inlet is provided on the side wall of the powder pressing channel, and the feed inlet is connected to the channel.

[0011] The second driving device includes a motor. The screw is fitted with a nut whose threads are adapted to its own. The screw drives the nut to move up and down reciprocally through the threads. The nut has several limiting grooves on its periphery. The limiting grooves are provided with guide rods and limiting holes. The guide rods pass through the limiting holes and extend downward along the screw to connect to a powder pressing part. The powder pressing part is adapted to the size of the powder pressing channel. A compression spring is fitted on the outside of the guide rod. The compression spring rests against the nut and the powder pressing part along the guide rod.

[0012] The coffee machine grinds coffee beans into coffee powder using a grinding device. The powder enters the channel through the outlet and then enters the tamping channel through the inlet, falling into the powder cup funnel. The tamping device compacts the coffee powder in the powder cup funnel. The powder cup funnel is then removed and installed at the brewing port of the brewing device, and the coffee is brewed using the brewing device.

[0013] Specifically, the conductive terminal can be connected to the metal sleeve by rivets;

[0014] The powder sweeper and the cutter head are provided with pin holes on the surface where they come into contact, and the powder sweeper and the cutter head are connected by pins.

[0015] Specifically, the coffee maker funnel, known in the industry as the brewing head, is located at the end of the tamping channel and the brewing port of the brewing device. It can be installed and removed manually by rotating it. Installed at the end of the tamping channel, it is used to collect and compact the coffee powder. After compaction, it can be removed manually and installed at the brewing port for pre-infusion and brewing of coffee. The coffee maker funnel has an arc-shaped groove at the bottom, under which a cup is placed. The brewed coffee can flow into the cup through the arc-shaped groove.

[0016] The heating module can be a heating plate or heating element, etc., which can heat the water to 90°C.

[0017] The coffee machine is also equipped with a control device, which is connected to a control panel. It is mainly used to control the grinding device, tamping device, and brewing device. The grinding, tamping, and brewing functions can be achieved by manually operating the control panel.

[0018] Preferably, the grinding device further includes a cutter head adjustment assembly, which includes an adjustment disc and an adjustment ring. The outer side wall of the adjustment disc and the inner side wall of the adjustment ring are provided with mutually compatible threads and are connected by threaded engagement.

[0019] The adjusting disc and the outer wall of the grinding shell have an axially fitted guide and guide groove, and the cutter disc is fixed relative to the adjusting disc.

[0020] Specifically, the cutter head adjustment component is simple to set up, easy to disassemble and clean, and can also achieve the precision of metal components at a lower cost.

[0021] A sealing ring is also provided on the outer side of the adjusting disc, and the sealing ring is located at the upper end of the thread;

[0022] The adjusting ring mainly drives the adjusting disc to move through its threaded connection with the adjusting disc. Due to the limiting effect of the guide, the adjusting disc cannot rotate. Therefore, when the adjusting ring is rotated, the adjusting disc can only move up and down under the action of the thread.

[0023] The guide component is double-layered, including an outer guide component and an inner guide component, with the inner guide component being smaller than the outer guide component; the guide groove is also double-layered, including an inner guide groove and an outer guide groove; the inner guide groove is adapted to the inner guide component, and the outer guide groove is adapted to the outer guide component; the guide component and guide groove are designed primarily to prevent the adjustment disc from rotating, allowing the adjustment disc to move only up and down; the double-layered design makes the adjustment disc more stable during up and down movement, preventing it from shifting.

[0024] The outer side of the adjusting ring is also provided with a gear, and an adjusting device can be provided at the position where it connects with the gear. The adjusting device is also provided with a gear adapted to the adjusting ring. The function of the adjusting device is to drive the adjusting ring to rotate by rotating the gear.

[0025] Preferably, an annular baffle with an upward protrusion is provided around the shaft hole at the bottom of the grinding chamber, and the powder sweeper covers the annular baffle;

[0026] The cutter head is a frustum structure that gradually increases in size from top to bottom; the inner side of the cutter disc is a curved surface structure that is narrow in the middle and wide at the top and bottom, and the part of the cutter disc that widens from narrow at the bottom is adapted to the side wall of the frustum structure of the cutter head.

[0027] Specifically, the cutting tool is located in the grinding chamber, and the cutting head and the powder sweeper are also provided with corresponding shaft holes. One end of the drive shaft passes through the shaft holes of the powder sweeper and the cutting head in sequence and is connected to the cutting head. The other end is connected to the first drive device, which drives the cutting head to rotate.

[0028] Coffee beans are ground by placing them between the blade and the burr head; a metal sleeve is used to fix and surround the burr head, which can improve the stability of the blade during grinding. At the same time, the precision of metal is higher than that of plastic, which can also improve the precision of the powder output and ensure the uniformity of the powder size.

[0029] The ground coffee powder falls into the grinding chamber, and the powder sweeper can sweep the coffee powder to the outlet, from where it enters the tamping device along the channel.

[0030] Preferably, the opening at the upper end of the cutter head protrudes outward to form an annular edge, and the annular edge is provided with a plurality of grooves;

[0031] The cutter head is provided with a cutter head support on the outside. The cutter head support is a hollow annular structure with an annular edge on its inner wall. Several fasteners are provided at the lower end of the annular edge. The annular edge of the cutter head is fastened between the annular edge and the fasteners.

[0032] A protrusion is provided between the ring edge and the fastener. The size and position of the protrusion are adapted to the groove of the cutter head, and the protrusion and the groove are engaged and connected.

[0033] Specifically, the cutter head bracket is mainly used to fix the cutter head and connect it to the adjustment plate; the cutter head bracket fixes the cutter head through the ring edge and fasteners, thereby driving the cutter head to move together with the cutter head bracket.

[0034] Preferably, the inner wall of the adjusting disc has a first support protruding inward, and the guide member is located at the lower end of the first support.

[0035] The lower end of the thread on the inner side of the adjusting ring protrudes inward to form a second support.

[0036] The outer wall of the grinding chamber is also provided with an annular fixing plate, which is located at the upper end of the guide groove;

[0037] The inner ring of the fixed plate is provided with several slots, the positions of which correspond to the positions of the guide grooves; a third support is also provided on the periphery of the guide grooves, and the adjusting ring is engaged between the fixed plate and the third support through the second support.

[0038] Specifically, the fixed plate is provided with several screw holes, and the fixed plate is fixedly connected to the grinding shell through the screw holes;

[0039] The main function of the second support is to prevent the adjusting ring from moving up and down. The second support is located between the fixed plate and the third support, and is used to fix the adjusting ring so that it can only rotate and not move up and down.

[0040] The metal sleeve is provided with a recess, the position and size of which are adapted to the guide component;

[0041] The guide of the adjusting disc passes through the recess of the metal sleeve and the slot of the fixed disc in sequence, and extends into the guide groove; through the limiting relationship between the recess, the slot and the guide groove and the guide, the adjusting disc is prevented from rotating, so that the adjusting disc can only move up and down.

[0042] Preferably, the outer side wall of the cutter head bracket and the inner side wall of the adjusting plate have mutually cooperating limiting parts and limiting members, and the cutter head is fixed relative to the adjusting plate through the cutter head bracket.

[0043] Specifically, the first support is located at the lower end of the limiting member;

[0044] The limiting part includes horizontal grooves and horizontal blocks arranged vertically; the length of the horizontal grooves is greater than the length of the horizontal blocks, and the end of the horizontal blocks is also provided with a locking part; the limiting component includes horizontal components arranged vertically and locking components, and the locking component is engaged with the locking part; the cutter head support is connected to the adjusting plate through the limiting part;

[0045] The cutter head bracket is mainly used to fix the cutter head and connect it to the adjustment plate; the cutter head bracket fixes the cutter head through a ring edge and fasteners; thus, the cutter head, cutter head bracket and adjustment plate can move simultaneously.

[0046] The limiting part and limiting component can make the connection between the adjusting plate and the cutter head support more stable, ensuring that their positional relationship will not shift when the whole is adjusted.

[0047] By connecting the fixed plate, adjusting ring, adjusting plate, burr holder, and burr in sequence, a stable connection is achieved between them, and the burr can be adjusted, thus controlling the fineness of the ground coffee powder.

[0048] Preferably, the powder pressing channel is a circular channel, and the powder pressing device further includes a cylinder integrated with the powder pressing part. The cylinder extends upward to cover the guide rod. Several annular grooves are provided on the outer wall of the cylinder, and friction rings are installed in the annular grooves. When the powder pressing action is performed, the friction rings generate circumferential and axial sliding friction forces with the inner wall of the powder pressing channel.

[0049] Specifically, the friction ring mainly creates appropriate friction between the cylinder and the powder pressing shell. The powder pressing part is connected to the cylinder as one unit, so the two will move synchronously. When the screw rotates, the nut and the cylinder will rotate simultaneously due to the connection of the guide rod. The friction force can make the nut and the screw rotate relative to each other, preventing the nut from rotating in place with the screw, thus realizing up and down movement; that is, the cooperation between the screw and the nut. When the screw rotates, the nut will move linearly along the axis of the screw, so the screw can drive the nut to rotate.

[0050] Preferably, the powder pressing part is further provided with a powder pressing plate for fixing its lower end surface;

[0051] The size of the powder pressing plate is adapted to the size of the lower end of the powder pressing part. The powder pressing plate is provided with a connecting hole in the middle, and the powder pressing plate is fixed to the lower end of the powder pressing part through the connecting hole.

[0052] Specifically, the tamping plate rotates and moves with the tamping section to tamp the coffee powder, flattening it during the rotation process.

[0053] Preferably, the side of the powder pressing part that connects with the guide rod is provided with a plurality of guide rod grooves, the guide rod grooves being adapted to the guide rods, and the guide rods being fixed to the powder pressing part through the guide rod grooves.

[0054] Specifically, the limiting groove is located on the circumference of the disc surface near the second driving device side of the nut, and a screw is provided in the limiting groove. The two ends of the guide rod are respectively provided with guide rod holes. One end of the guide rod is connected to the guide rod hole by a screw; the other end is fixedly connected to the powder pressing part by a screw.

[0055] The guide rod is fixed to the powder pressing part through the guide rod groove, and rotates and moves synchronously with the powder pressing part; the screw drives the nut to rotate, the nut drives the guide rod to rotate the powder pressing part, and pushes the powder pressing part to move through the compression spring, thereby achieving the effect of rotation and translation;

[0056] By connecting the limiting groove to the guide rod, the nut can be restricted to rotating and moving only within the length range of the guide rod, preventing the nut from moving out of the guide rod; that is, the nut can move within the range of the guide rod and drive the powder pressing part to move through the compression spring. The elastic force of the compression spring is relatively stable, thereby forming a stable downward force for pressing the powder.

[0057] Preferably, the side wall of the powder pressing channel is connected to a feed inlet, and the height of the feed inlet in the powder pressing channel is lower than the height of the powder pressing section in the powder pressing channel.

[0058] Specifically, the lower end of the tamping channel is connected to a coffee cup funnel. Coffee powder slides down the channel to the feed inlet, enters the tamping channel through the feed inlet, and falls into the coffee cup funnel. The tamping unit tamps the coffee powder in the coffee cup funnel along the tamping channel.

[0059] The coffee maker's funnel is equipped with a fine mesh, and a handle is connected to the outside of the funnel. The tamping unit tamps and distributes the coffee grounds in the funnel along the tamping channel. After tamping, the funnel can be used directly for brewing coffee, avoiding the loss of coffee grounds during tamping. The fine mesh compacts the coffee grounds, preventing larger coffee particles from falling off. During pre-infusion, the coffee grounds fully absorb water without clogging the mesh. The surface of the coffee grounds expands after absorbing water, increasing the contact area with the mesh and making it more compact, reducing uneven distribution. During brewing, it allows for the full release of aromatic substances in the coffee, enhancing its flavor.

[0060] The coffee machine is also equipped with a steam outlet and a water outlet. The steam outlet can be used to generate milk foam or to extract components from the coffee through steam, thereby increasing the coffee's concentration and improving its taste. The water outlet can provide hot water.

[0061] Compared with the prior art, the present invention achieves the following beneficial effects:

[0062] This invention provides a multi-functional coffee machine, including a grinding device and a tamping device. The grinding device, while maintaining an overall structure made of plastic or rubber, incorporates a metal sleeve for adaptation. Adding only the metal sleeve keeps the equipment cost low and the price relatively inexpensive. Furthermore, the high precision of the metal processing ensures a minimal clearance fit between the burr disc and the metal sleeve, guaranteeing concentricity of the burr disc and blades, and preventing uneven coarseness and blade collisions caused by burr disc eccentricity and wobbling. Ultimately, this results in a low-cost device that guarantees uniform powder coarseness. During grinding, a large amount of static electricity is generated due to drying. The finely ground powder carries this static electricity, which is conducted away through the conductive terminals of the metal sleeve via the ground wire. This prevents static-induced powder adhesion and flying powder from clogging the equipment and causing damage to electronic devices. The burr disc adjustment component is designed for easy disassembly and cleaning, and achieves precision comparable to metal components at a lower cost.

[0063] The tamping device drives a screw to rotate, which in turn drives a nut to rotate and advance along a guide rod. The guide rod is fixedly connected to the tamping section, allowing the tamping section to rotate with the guide rod. A compression spring allows the nut to push the tamping section forward. The combination of the guide rod and the compression spring enables the nut to rotate and advance the tamping section. During this rotation, the coffee powder is automatically rotated and flattened. Since the spring force is basically constant and continuous, the tamping force is within a controllable range, preventing the coffee powder from being tamped too compacted or too loose, which would affect the brewing effect and improve the taste of the brewed coffee.

[0064] The brewing device is located next to the tamping device. After tamping, the coffee cup funnel can be directly removed from the tamping device and installed on the brewing device for pre-infusion and brewing.

[0065] The multi-functional coffee machine provided by this invention integrates automatic grinding, automatic tamping, and brewing of coffee beans by setting a channel between the grinding device and the tamping device. The metal sleeve reduces the overall cost of the machine, ensures high grinding precision, and prevents static electricity. The compression spring automates tamping with uniform and controllable tamping force. From grinding and tamping to brewing, it achieves multi-functional and automated control, ensuring high requirements for grinding and tamping during coffee brewing while being simple, convenient, and low-cost to use. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of a multi-functional coffee machine provided in an embodiment of the present invention;

[0067] Figure 2 This is a partial structural schematic diagram of a multi-functional coffee machine provided in an embodiment of the present invention;

[0068] Figure 3 This is a schematic diagram of the grinding device and tamping device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0069] Figure 4 This is a cross-sectional schematic diagram of the grinding device and tamping device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0070] Figure 5 This invention provides a multi-functional coffee machine. Figure 4 Enlarged diagram of section A in the middle;

[0071] Figure 6 This is a schematic diagram of the grinding shell structure of a grinding device for a multi-functional coffee machine provided in an embodiment of the present invention;

[0072] Figure 7 This invention provides a multi-functional coffee machine. Figure 7 Enlarged diagram of section B;

[0073] Figure 8 This is a schematic diagram of the blade structure of a grinding device for a multi-functional coffee machine provided in an embodiment of the present invention;

[0074] Figure 9 This is a schematic diagram of the blade structure of a grinding device for a multi-functional coffee machine provided in an embodiment of the present invention;

[0075] Figure 10 This is a schematic diagram of the metal sleeve structure of the grinding device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0076] Figure 11 This is one of the schematic diagrams of the blade support structure of the grinding device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0077] Figure 12 This is a second schematic diagram of the blade support structure of the grinding device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0078] Figure 13 This is a schematic diagram of the adjustment plate structure of the grinding device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0079] Figure 14 This is a schematic diagram of the adjustment ring structure of the grinding device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0080] Figure 15 This is a schematic diagram of the fixed disk structure of the grinding device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0081] Figure 16 This is a schematic diagram of the tamping section and cylinder of a tamping device for a multi-functional coffee machine provided in an embodiment of the present invention;

[0082] Figure 17 This is a schematic diagram of the nut structure of the tamping device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0083] Figure 18 This is a schematic diagram of the guide rod structure of the tamping device of a multi-functional coffee machine provided in an embodiment of the present invention;

[0084] Figure 19 This is a schematic diagram of the powder cup funnel structure of a multi-functional coffee machine provided in an embodiment of the present invention.

[0085] Figure label:

[0086] 101. Grinding shell; 102. Grinding chamber; 103. Drive shaft; 104. Discharge port; 105. Channel; 106. Annular partition; 107. Powder sweeper; 108. Guide groove; 109. Outer guide groove; 110. Inner guide groove; 111. Third support platform;

[0087] 201. Cutting head; 202. Pin hole; 203. Cutting disc; 204. Annular edge; 205. Groove;

[0088] 301. Metal sleeve; 302. Recessed portion; 303. Conductive terminal;

[0089] 401. Cutter head support; 402. Ring edge; 403. Fastener; 404. Protrusion; 405. Limiting part; 406. Transverse groove; 407. Transverse block; 408. Locking part;

[0090] 501. Adjusting plate; 502. First support platform; 503. Limiting component; 504. Lateral component; 505. Locking component; 506. Guide component; 507. Outer guide component; 508. Inner guide component;

[0091] 601. Adjusting ring; 602. Second support platform; 603. Adjusting device;

[0092] 701. Fixed plate; 702. Card slot;

[0093] 801. Powder pressing shell; 802. Screw; 803. Guide rod; 804. Compression spring; 805. Powder pressing channel; 806. Feed inlet; 807. Guide rod hole;

[0094] 901. Powder pressing section; 902. Guide rod groove; 903. Annular groove; 904. Cylinder body;

[0095] 1001, Nut; 1002, Limiting Hole; 1003, Limiting Groove;

[0096] 1101. First driving device; 1102. Second driving device; 1103. Grinding funnel; 1104. Powder cup funnel; 1105. Powder pressing device; 1106. Brewing port; 1107. Control panel; 1108. Dense grid. Detailed Implementation

[0097] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0098] Example

[0099] like Figures 1 to 19 A multi-functional coffee machine includes a housing and a grinding device and a tamping device 1105 disposed within the housing. The grinding device is connected to the tamping device 1105 via a downward-sloping channel 105. The brewing device includes a water tank, a water pump, a heating module, and a brewing spout 1106. A powder cup funnel 1104 is provided at the brewing spout 1106. The water pump draws water from the water tank, which flows out through the brewing spout 1106. The heating module is used to heat the water. A connecting part is provided at the brewing spout 1106, and the powder cup funnel 1104 is movably connected to the brewing spout 1106 via the connecting part.

[0100] The grinding device includes a grinding shell 101 and a metal cutting tool, a drive shaft 103, and a first drive device 1101 disposed within the grinding shell 101. The grinding shell 101 is provided with a grinding cavity 102, and the bottom of the grinding cavity 102 is provided with a shaft hole. The drive shaft 103 passes vertically through the shaft hole at the bottom of the grinding cavity 102, with one end connected to the first drive device 1101 outside the grinding cavity 102 and the other end connected to the cutting tool. The bottom of the grinding cavity 102 is also provided with a powder sweeper 107, and the cutting tool is located at the upper end of the powder sweeper 107 and connected to the powder sweeper 107. The grinding cavity 102 is provided with a discharge port 104, which communicates with a channel 105.

[0101] The cutting tool includes a cutting head 201 and a cutting disc 203 surrounding the outer periphery of the cutting head 201. A metal sleeve 301 surrounds the outer periphery of the cutting disc 203. The metal sleeve 301 is installed, fixed, and sealed to the inner wall of the grinding chamber 102 by an interference fit, and is connected to the cutting disc 203. The grinding shell 101 is made of plastic, and the metal sleeve 301 is provided with conductive terminals 303.

[0102] The conductive terminal 303 can be connected to the metal sleeve 301 by means of rivets;

[0103] The powder sweeper 107 and the cutter head 201 are provided with pin holes 202 on the surface where they are in contact, and the powder sweeper 107 and the cutter head 201 are connected by pins.

[0104] The powder cup funnel, known in the industry as the brewing head, is located at the end of the tamping channel and the brewing port 1106 of the brewing device. The connection between the connecting part and the brewing port 1106 can be installed and removed manually by rotating it. It is installed at the end of the tamping channel to collect and compact the powder. After compaction, it can be removed manually and installed in the adjacent brewing port 1106. The coffee is pre-infused and brewed at the brewing port 1106. The powder cup funnel has an arc-shaped groove at the bottom, under which a cup is placed. The brewed coffee can flow into the cup through the arc-shaped groove.

[0105] The heating module can be a heating plate or heating element, etc., which can heat the water to 90°C.

[0106] The coffee machine is also equipped with a control device, which is connected to a control panel 1107. The control device is mainly used to control the grinding device, the tamping device 1105, and the brewing device. The functions of grinding, tamping, and brewing can be realized by manually operating the control panel 1107.

[0107] The grinding device is equipped with a grinding funnel 1103 for adding coffee beans. Coffee beans are added to the grinding funnel 1103 and enter the grinding device through the grinding funnel 1103.

[0108] The grinding device also includes a cutter head 203 adjustment assembly, which includes an adjustment disc 501 and an adjustment ring 601. The outer side wall of the adjustment disc 501 and the inner side wall of the adjustment ring 601 are provided with mutually compatible threads and are connected by threaded engagement.

[0109] The adjusting disc 501 and the outer wall of the grinding shell 101 have an axially fitted guide 506 and a guide groove 108, and the cutter disc 203 is fixed relative to the adjusting disc 501.

[0110] The 203 cutter head adjustment component is simple to set up, easy to disassemble and clean, and can also achieve the precision of metal components at a lower cost.

[0111] The outer side of the adjusting disc 501 is also provided with a sealing ring, which is located at the upper end of the thread;

[0112] The adjusting ring 601 mainly drives the adjusting disc 501 to move through its threaded connection with the adjusting disc 501. Due to the limiting effect of the guide 506, the adjusting disc 501 cannot rotate. Therefore, when the adjusting ring 601 is rotated, the adjusting disc 501 can only move up and down under the action of the thread.

[0113] The guide member 506 is double-layered, including an outer guide member 507 and an inner guide member 508, with the inner guide member 508 being smaller than the outer guide member 507. The guide groove 108 is also double-layered, including an inner guide groove 110 and an outer guide groove 109. The inner guide groove 110 is adapted to the inner guide member 508, and the outer guide groove 109 is adapted to the outer guide member 507. The guide members 506 and the guide groove 108 are designed primarily to prevent the adjustment disc 501 from rotating, allowing it to move only up and down. The double-layered design makes the adjustment disc 501 more stable during up and down movement, preventing it from shifting.

[0114] The outer side of the adjusting ring 601 is also provided with a gear, and an adjusting device 603 can be provided at the position where it connects with the gear. The adjusting device 603 is also provided with a gear that is compatible with the adjusting ring 601. The function of the adjusting device 603 is to drive the adjusting ring 601 to rotate by rotating the gear.

[0115] The grinding chamber 102 has an upwardly protruding annular partition 106 around the shaft hole at the bottom, and the powder sweeper 107 covers the annular partition 106.

[0116] The cutter head 201 is a frustum structure that gradually increases in size from top to bottom; the inner side of the cutter disc 203 is a curved surface structure that is narrow in the middle and wide at the top and bottom, and the part of the cutter disc 203 that widens from narrow at the bottom is adapted to the side wall of the frustum structure of the cutter head 201.

[0117] The cutting tool is located in the grinding chamber 102. The cutting head 201 and the powder sweeper 107 are also provided with corresponding shaft holes. One end of the drive shaft 103 passes through the shaft holes of the powder sweeper 107 and the cutting head 201 in sequence and is connected to the cutting head 201. The other end is connected to the first drive device 1101, which drives the cutting head 201 to rotate.

[0118] Coffee beans are ground by placing them between the blade 201 and the blade disc 203. The metal sleeve 301 is fixed around and fitted around the blade disc 203, which can improve the stability of the blade during grinding. At the same time, the precision of metal is higher than that of plastic, which can also improve the precision of the powder output during grinding and ensure the uniformity of the powder size.

[0119] The ground coffee powder falls into the grinding chamber 102. The powder sweeper 107 can sweep the coffee powder to the outlet 104, and from the outlet 104 it enters the tamping device 1105 through the channel 105.

[0120] The opening at the upper end of the cutter head 203 protrudes outward to form an annular edge 204, and the annular edge 204 is provided with a plurality of grooves 205;

[0121] The cutter head 203 is provided with a cutter head support 401 on its outer side. The cutter head support 401 is a hollow annular structure with an annular edge 402 on its inner wall. Several fasteners 403 are provided at the lower end of the annular edge 402. The annular edge 204 of the cutter head 203 is fastened between the annular edge 402 and the fasteners 403.

[0122] A protrusion 404 is also provided between the ring edge 402 and the fastener 403. The size and position of the protrusion 404 are adapted to the groove 205 of the cutter head 203, and the protrusion 404 and the groove 205 are engaged and connected.

[0123] The cutter head bracket 401 is mainly used to fix the cutter head 203 and connect it to the adjusting plate 501. The cutter head bracket 401 fixes the cutter head 203 through the ring edge 402 and the fastener 403, so that the cutter head 203 can be driven to move together with the cutter head bracket 401.

[0124] The outer side wall of the cutter head support 401 and the inner side wall of the adjusting plate 501 have mutually cooperating limiting parts 405 and limiting members 503, and the cutter head 203 is fixed relative to the adjusting plate 501 through the cutter head support 401.

[0125] The first support 502 is located at the lower end of the limiting member 503;

[0126] The limiting part 405 includes a transverse groove 406 and a transverse block 407 arranged vertically; the length of the transverse groove 406 is greater than the length of the transverse block 407, and the end of the transverse block 407 is also provided with a locking part 408; the limiting member 503 includes a transverse member 504 and a locking member 505 arranged vertically, and the locking member 505 is engaged with the locking part 408; the cutter head support 401 is connected to the adjusting plate 501 through the limiting part 405;

[0127] The cutter head bracket 401 is mainly used to fix the cutter head 203 and connect it to the adjusting plate 501; the cutter head bracket 401 fixes the cutter head 203 through the ring edge 402 and the fastener 403; thereby enabling the cutter head 203, the cutter head bracket 401 and the adjusting plate 501 to move simultaneously.

[0128] The limiting part 405 and the limiting member 503 can make the connection between the adjusting plate 501 and the cutter head support 401 more stable, ensuring that their positional relationship will not shift when the whole is adjusted.

[0129] The inner wall of the adjusting disc 501 has a first support 502 protruding inward, and the guide 506 is located at the lower end of the first support 502.

[0130] The lower end of the thread on the inner side of the adjusting ring 601 protrudes inward to form a second support 602;

[0131] The outer wall of the grinding chamber 102 is also provided with an annular fixing disk 701, which is located at the upper end of the guide groove 108;

[0132] The inner ring of the fixed plate 701 is provided with a plurality of slots 702, the positions of the slots 702 corresponding to the positions of the guide groove 108; the outer periphery of the guide groove 108 is also provided with a third support 111, and the adjusting ring 601 is engaged between the fixed plate 701 and the third support 111 through the second support 602.

[0133] The fixed plate 701 is provided with several screw holes, and the fixed plate 701 is fixedly connected to the grinding shell 101 through the screw holes;

[0134] The main function of the second support 602 is to prevent the adjusting ring 601 from moving up and down. The second support 602 is located between the fixed plate 701 and the third support 111 and is used to fix the adjusting ring 601 so that it can only rotate and not move up and down.

[0135] The metal sleeve 301 is provided with a recess 302, the position and size of which are adapted to the guide 506;

[0136] The guide 506 of the adjusting disc 501 passes through the recess 302 of the metal sleeve 301 and the slot 702 of the fixed disc 701 in sequence, and extends into the guide groove 108; through the limiting relationship between the recess 302, the slot 702 and the guide groove 108 and the guide 506, the adjusting disc 501 is prevented from rotating, so that the adjusting disc 501 can only move up and down;

[0137] Through the sequential matching and connection of the fixed plate 701, the adjusting ring 601, the adjusting plate 501, the blade holder 401, and the blade 203, a stable connection between them is achieved, and the adjustment function of the blade 203 is also realized, thereby controlling and adjusting the fineness of the ground coffee powder.

[0138] The first driving device 1101 includes a transmission wheel, a driven wheel and a main driving wheel that are meshed by gears in sequence. The transmission wheel is connected to a motor, and the drive shaft 103 is connected to the main driving wheel.

[0139] Speed ​​change is achieved by meshing the transmission wheel, driven wheel and main drive wheel to increase torque. The motor drives the transmission wheel to rotate, the transmission wheel drives the driven wheel to rotate, and the driven wheel drives the main drive wheel to rotate. The main drive wheel drives the drive shaft 103 to rotate, thereby realizing the rotation of the cutter head 201.

[0140] The powder pressing device 1105 includes a powder pressing shell 801, a vertical powder pressing channel 805 inside the powder pressing shell 801, a screw 802 inside the powder pressing channel 805, and a second driving device 1102 outside the powder pressing channel 805. The second driving device 1102 is drivenly connected to the screw 802 and drives the screw 802 to rotate. A powder cup funnel 1104 is provided at the end of the powder pressing channel 805. A feed inlet 806 is provided on the side wall of the powder pressing channel 805, and the feed inlet 806 is connected to the channel 105.

[0141] The second driving device 1102 includes a motor. The screw 802 is fitted with a nut 1001 that is adapted to its thread. The screw 802 drives the nut 1001 to move up and down reciprocally through the thread. The nut 1001 has several limiting grooves 1003 on its periphery. The limiting grooves 1003 are provided with guide rods 803 and limiting holes 1002. The guide rods 803 pass through the limiting holes 1002 and extend downward along the screw 802 to connect to the powder pressing part 901. The powder pressing part 901 is adapted to the size of the powder pressing channel 805. A compression spring 804 is fitted on the outside of the guide rod 803. The compression spring 804 abuts against the nut 1001 and the powder pressing part 901 along the guide rod 803.

[0142] The powder pressing channel 805 is a circular channel 105. The powder pressing device 1105 also includes a cylindrical body 904 that is integrally connected with the powder pressing part 901. The cylindrical body 904 extends upward to cover the guide rod 803. Several annular grooves 903 are provided on the outer side wall of the cylindrical body 904. Friction rings are installed in the annular grooves 903. When the powder pressing action is performed, the friction rings generate circumferential and axial sliding friction forces with the inner wall of the powder pressing channel 805.

[0143] The friction ring mainly creates appropriate friction between the cylinder 904 and the powder pressing shell 801. The powder pressing part 901 and the cylinder 904 are connected as one unit, so they will move synchronously. When the screw 802 rotates, the nut 1001 and the cylinder 904 will rotate simultaneously due to the connection of the guide rod 803. The friction force can make the nut 1001 and the screw 802 rotate relative to each other, preventing the nut 1001 from rotating in place with the screw 802, thereby realizing up and down movement; that is, the cooperation between the screw 802 and the nut 1001. When the screw 802 rotates, the nut 1001 will move linearly along the axis of the screw 802. Therefore, the screw 802 can drive the nut 1001 to rotate.

[0144] The powder pressing section 901 is also provided with a powder pressing plate that fixes its lower end surface;

[0145] The size of the powder pressing plate is adapted to the size of the lower end of the powder pressing part 901. The powder pressing plate is provided with a connecting hole in the middle, and the powder pressing plate is fixed to the lower end of the powder pressing part 901 through the connecting hole.

[0146] The tamping plate rotates and moves with the tamping section 901, tamping the coffee powder and flattening it during the rotation process.

[0147] The powder pressing part 901 is provided with a plurality of guide rod grooves 902 on the side where it connects with the guide rod 803. The guide rod grooves 902 are adapted to the guide rod 803, and the guide rod 803 is fixed to the powder pressing part 901 through the guide rod grooves 902.

[0148] The limiting groove 1003 is located on the circumference of the disc surface of the nut 1001 near the second driving device 1102. The limiting groove 1003 is provided with a screw. The two ends of the guide rod 803 are respectively provided with guide rod holes 807. One end of the guide rod 803 is connected to the guide rod hole 807 by a screw; the other end is fixedly connected to the powder pressing part 901 by a screw.

[0149] The guide rod 803 is fixed to the powder pressing part 901 through the guide rod groove 902, and rotates and moves synchronously with the powder pressing part 901; the screw 802 drives the nut 1001 to rotate, the nut 1001 drives the guide rod 803 to drive the powder pressing part 901 to rotate, and pushes the powder pressing part 901 to move through the compression spring 804, thereby achieving the effect of rotation and translation.

[0150] By connecting the limiting groove 1003 to the guide rod 803, the nut 1001 can be restricted to rotate and move only within the length range of the guide rod 803, preventing the nut 1001 from moving out of the guide rod 803; that is, the nut 1001 can move within the range of the guide rod 803, and the powder pressing part 901 is driven to move by the compression spring 804. The elastic force of the compression spring 804 is relatively stable, thereby forming a stable downward powder pressing force.

[0151] The side wall of the powder pressing channel 805 is connected to the feed inlet 806. The height of the feed inlet 806 in the powder pressing channel 805 is lower than the height of the powder pressing part 901 in the powder pressing channel 805.

[0152] The lower end of the tamping channel 805 is connected to the coffee cup funnel 1104. The coffee powder slides down from the channel 105 to the feed inlet 806, enters the tamping channel 805 through the feed inlet 806, and falls into the coffee cup funnel 1104. The tamping unit 901 tamps the coffee powder in the coffee cup funnel 1104 along the tamping channel 805.

[0153] The coffee cup funnel 1104 is equipped with a fine mesh 1108, and a handle is connected to the outside of the coffee cup funnel 1104. The tamping part 901 tamps and distributes the coffee powder in the coffee cup funnel 1104 along the tamping channel 805. After tamping, the coffee cup funnel 1104 can be used directly to brew coffee, avoiding the loss of coffee powder during tamping.

[0154] The fine mesh 1108 compacts the coffee grounds, preventing larger coffee particles from falling off. During pre-infusion, the coffee grounds fully absorb water without clogging the fine mesh 1108. The surface of the coffee grounds expands after absorbing water, increasing the contact area with the fine mesh 1108 and making it more compact, reducing uneven distribution of the grounds. During brewing, the aromatic substances in the coffee can be fully released, enhancing the coffee's flavor.

[0155] The coffee machine is also equipped with a steam outlet and a water outlet. The steam outlet can be used to generate milk foam or to extract components from the coffee through steam, thereby increasing the coffee's concentration and improving its taste. The water outlet can provide hot water.

[0156] The structure and working principle of the second drive device 1102 can be found in the first drive device 1101, and will not be described again here.

[0157] The main working principle of this invention is as follows: Coffee beans are added through the grinding funnel 1103 above the grinding device, and the coffee beans enter the grinding device between the burr disc 203 and the blade 201; the first driving device 1101 drives the drive shaft 103 to rotate, which in turn drives the blade 201 to grind the coffee beans; the distance between the blade 201 and the burr disc 203 can be adjusted by the adjusting device 603 to adjust the grinding fineness. Specifically, the adjusting device 603 controls the rotation of the adjusting ring 601, which is positioned between the fixed plate 701 and the third support 111 and cannot move up or down; the adjusting ring 601... The threaded drive causes the adjusting disc 501 to move. Due to the limiting effect of the guide 506 on the adjusting disc 501, the adjusting disc 501 can only move up and down under the drive of the adjusting ring 601 and cannot rotate. The adjusting disc 501 is connected to the cutter head support 401 through the limiting member 503, thereby driving the cutter head support 401 to move with the adjusting disc 501. The cutter head support 401 drives the cutter head 203 to move up and down through the connection between its ring edge 402 and fastener 403 and the cutter head 203. Through the frustum structure relationship between the cutter head 203 and the cutter head 201, the grinding distance between the cutter head 203 and the cutter head 201 is adjusted, thereby adjusting the grinding fineness.

[0158] The ground coffee powder enters the channel 105 through the outlet 104, then flows to the inlet 806, and enters the tamping channel 805 through the inlet 806, falling into the powder cup funnel 1104 at its lower end. The second drive device 1102 drives the screw 802 to rotate, which in turn drives the nut 1001 to rotate and move downwards along the thread. The nut 1001 drives the tamping part 901 to rotate through the guide rod 803, and pushes the tamping part 901 downwards through the compression spring 804. Thus, the guide rod 803 and the compression spring 804 drive the tamping part 901 to rotate and move, using the elastic force of the compression spring 804 to tamp the powder. The tamping is then complete. Afterwards, the coffee maker can be directly removed from the tamping cup funnel 1104 and installed at the brewing port 1106 of the brewing device to brew coffee, avoiding problems such as coffee grounds falling off during tamping and uneven tamping. When brewing coffee, 90°C hot water is added to the coffee maker funnel through the brewing port 1106 to pre-soak the coffee grounds, allowing them to fully absorb water and expand, increasing the contact area with the mesh 1108 and making them more compact. This improves the coffee's flavor during subsequent brewing. In this way, the coffee machine achieves an integrated function of grinding, tamping, and brewing, and meets the extremely high requirements for the fineness of the coffee grind, the control of the tamping force, and the brewing process.

[0159] The multi-functional coffee machine provided by this invention can reduce the overall cost of the machine and ensure high precision grinding through the metal sleeve 301, while also preventing static electricity; the compression spring 804 can realize the automation of tamping and the uniform and controllable tamping force. From grinding to tamping, multi-functional and automated control can be achieved, which not only ensures the high requirements for grinding and tamping when brewing coffee, but also makes it simple, convenient and low-cost to use.

[0160] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A multi-functional coffee machine, comprising a housing and a grinding device, a tamping device, and a brewing device disposed within the housing, wherein the grinding device is connected to the tamping device via a downward-sloping channel; the brewing device includes a water tank, a water pump, a heating module, and a brewing spout, wherein a powder cup funnel is provided at the brewing spout, and the water pump draws water from the water tank, which flows out through the brewing spout; the heating module is used to heat the water; a connecting part is provided at the brewing spout, and the powder cup funnel is movably connected to the brewing spout via the connecting part, characterized in that... The grinding device includes a grinding shell and a metal cutting tool, a drive shaft, and a first drive device disposed inside the grinding shell. The grinding shell has a grinding cavity, and the bottom of the grinding cavity has a shaft hole. The drive shaft passes vertically through the shaft hole at the bottom of the grinding cavity, with one end connected to the first drive device outside the grinding cavity and the other end connected to the cutting tool. The bottom of the grinding cavity also has a powder sweeper, with the cutting tool located at the upper end of the powder sweeper and connected to the powder sweeper. The grinding cavity has a discharge port, which communicates with a channel. The cutting tool includes a cutting head and a cutting disc surrounding the outer periphery of the cutting head. A metal sleeve surrounds the outer periphery of the cutting disc. The metal sleeve is installed, fixed, and sealed to the inner wall of the grinding chamber by an interference fit and is connected to the cutting disc. The grinding shell is made of plastic, and the metal sleeve is provided with conductive terminals. The grinding device also includes a cutter head adjustment assembly, which includes an adjustment disc and an adjustment ring. The outer side wall of the adjustment disc and the inner side wall of the adjustment ring are provided with mutually compatible threads and are connected by threaded engagement. The adjusting disc and the outer wall of the grinding shell have an axially fitted guide and guide groove, and the cutter disc is fixed relative to the adjusting disc; The inner wall of the adjusting disc has a first support platform protruding inward, and the guide member is located at the lower end of the first support platform; The lower end of the thread on the inner side of the adjusting ring protrudes inward to form a second support. The outer wall of the grinding chamber is also provided with an annular fixing plate, which is located at the upper end of the guide groove; The inner ring of the fixed plate is provided with several slots, the positions of which correspond to the positions of the guide grooves; a third support is also provided on the periphery of the guide grooves, and the adjusting ring is engaged between the fixed plate and the third support through the second support. The metal sleeve is provided with a recess, the position and size of which are adapted to the guide component; The guide of the adjusting plate passes through the recess of the metal sleeve and the slot of the fixed plate in sequence, and extends into the guide groove. The powder pressing device includes a powder pressing shell, a vertical powder pressing channel inside the powder pressing shell, a screw inside the powder pressing channel, a second driving device outside the powder pressing channel, the second driving device being connected to the screw and driving the screw to rotate, and a powder cup funnel at the end of the powder pressing channel; a feed inlet is provided on the side wall of the powder pressing channel, and the feed inlet is connected to the channel. The second driving device includes a motor. The screw is fitted with a nut whose threads are adapted to its own. The screw drives the nut to move up and down reciprocally through the threads. The nut has several limiting grooves on its periphery. The limiting grooves are provided with guide rods and limiting holes. The guide rods pass through the limiting holes and extend downward along the screw to connect to a powder pressing part. The powder pressing part is adapted to the size of the powder pressing channel. A compression spring is fitted on the outside of the guide rod. The compression spring rests against the nut and the powder pressing part along the guide rod.

2. The multi-functional coffee machine according to claim 1, characterized in that, The grinding chamber has an upwardly protruding annular baffle around the shaft hole at the bottom, and the powder sweeper covers the annular baffle. The cutter head is a frustum structure that gradually increases in size from top to bottom; the inner side of the cutter disc is a curved surface structure that is narrow in the middle and wide at the top and bottom, and the part of the cutter disc that widens from narrow at the bottom is adapted to the side wall of the frustum structure of the cutter head.

3. A multi-functional coffee machine according to claim 1, characterized in that, The opening at the upper end of the cutter head protrudes outward to form an annular edge, and the annular edge is provided with several grooves; The cutter head is provided with a cutter head support on the outside. The cutter head support is a hollow annular structure with an annular edge on its inner wall. Several fasteners are provided at the lower end of the annular edge. The annular edge of the cutter head is fastened between the annular edge and the fasteners. A protrusion is provided between the ring edge and the fastener. The size and position of the protrusion are adapted to the groove of the cutter head, and the protrusion and the groove are engaged and connected.

4. A multi-functional coffee machine according to claim 3, characterized in that, The outer side wall of the cutter head bracket and the inner side wall of the adjusting plate have mutually cooperating limiting parts and limiting members, and the cutter head is fixed relative to the adjusting plate through the cutter head bracket.

5. A multi-functional coffee machine according to claim 1, characterized in that, The powder pressing channel is a circular channel. The powder pressing device also includes a cylinder that is integrally connected to the powder pressing part. The cylinder extends upward to cover the guide rod. Several annular grooves are provided on the outer side wall of the cylinder. Friction rings are installed in the annular grooves. When the powder pressing action is performed, the friction rings generate circumferential and axial sliding friction forces with the inner wall of the powder pressing channel.

6. A multi-functional coffee machine according to claim 1, characterized in that, The powder pressing section is also provided with a powder pressing plate that fixes its lower end surface; The size of the powder pressing plate is adapted to the size of the lower end of the powder pressing part. The powder pressing plate is provided with a connecting hole in the middle, and the powder pressing plate is fixed to the lower end of the powder pressing part through the connecting hole.

7. A multi-functional coffee machine according to claim 1, characterized in that, The side of the powder pressing part that connects with the guide rod is provided with several guide rod grooves. The guide rod grooves are adapted to the guide rods, and the guide rods are fixed to the powder pressing part through the guide rod grooves.

8. A multi-functional coffee machine according to claim 1, characterized in that, The side wall of the powder pressing channel is connected to a feed inlet, and the height of the feed inlet in the powder pressing channel is lower than the height of the powder pressing section in the powder pressing channel.

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