A coffee maker, coffee powder guiding device

Abstract

The utility model discloses a coffee machine, coffee powder powder guide device, apply to coffee machine technical field, include: powder hammer subassembly, the powder hammer subassembly includes the small powder hammer (2) and big powder hammer (3) of coaxial arrangement, big powder hammer (3) is located the outside of small powder hammer (2), the bottom surface of small powder hammer (2) and big powder hammer (3) form the powder pressing surface together, powder guide pipe (1), powder guide pipe (1) includes powder leading section (11) and powder falling section (13), the junction of powder leading section (11) with powder falling section (13) is equipped with powder hole (12), the end of powder falling section (13) is equipped with powder outlet (14), and powder falling section (13) is located between small powder hammer (2) with big powder hammer (3). Let coffee powder accurate fall into the funnel center, form even powder heap, guarantee powder cake level, compact.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and in particular to a coffee machine and a coffee powder guiding device. Background Technology

[0002] After the grinding system grinds the coffee beans into powder, the coffee powder falls into the funnel; after tamping, the funnel is inserted into the brew head to extract the coffee liquid. However, the coffee powder falls along a dispersed path, resulting in uneven distribution of the coffee powder within the funnel. This causes the coffee puck to become skewed after tamping, and the coffee powder in different parts of the funnel cannot achieve a uniform compaction. Consequently, during subsequent extraction, hot water can easily pass through the loosely compacted coffee powder, affecting the extraction quality.

[0003] In conclusion, how to form a uniform coffee powder pile is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a coffee powder guiding device that allows coffee powder to form a uniform powder pile, ensuring that the coffee puck is flat and compacted evenly. Another purpose of this invention is to provide a coffee machine that includes the above-mentioned coffee powder guiding device, which has the same beneficial effects as the coffee powder guiding device.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A coffee powder guiding device, comprising:

[0007] A powder hammer assembly, comprising a small powder hammer and a large powder hammer arranged coaxially, wherein the large powder hammer is disposed outside the small powder hammer, and the bottom surfaces of the small powder hammer and the large powder hammer together form a powder pressing surface;

[0008] The powder guide tube includes a powder guiding section and a powder dropping section. A powder passage hole is provided at the connection between the powder guiding section and the powder dropping section. A powder outlet is provided at the end of the powder dropping section. The powder dropping section is located between the small powder hammer and the large powder hammer.

[0009] Optionally, it also includes a driving mechanism connected to the small powder hammer. The driving mechanism drives the small powder hammer to move until its bottom surface is flush with the bottom surface of the large powder hammer, and then continues to drive the small powder hammer and the large powder hammer to move and compact the coffee powder. When the driving mechanism drives the small powder hammer to move relative to the axis of the large powder hammer, the powder passage is blocked or opened by the small powder hammer.

[0010] Optionally, the small powder hammer is provided with a pressing part, and the large powder hammer is provided with a bearing part. When the small powder hammer moves to the point where its bottom surface is flush with the bottom surface of the large powder hammer, the pressing part abuts against the bearing part.

[0011] Optionally, the pressing part includes a pressing plate disposed on the upper part of the small powder hammer, and / or a pressing edge disposed on the bottom edge of the small powder hammer;

[0012] The pressure-bearing part includes a pressure-bearing plate disposed at the top of the large powder hammer, and / or a pressure-bearing edge disposed at the inner end of the large powder hammer;

[0013] When the small powder hammer moves to the point where its bottom surface is flush with the bottom surface of the large powder hammer, the pressure plate abuts against the pressure plate, and / or the pressure edge abuts against the pressure edge.

[0014] Optionally, the axial distance between the pressure plate and the bearing plate is equal to the axial distance between the pressure edge and the bearing edge.

[0015] Optionally, the end of the powder-falling section and the end of the large powder hammer are fitted with a conical surface; the conical surface of the end of the large powder hammer forms the pressure-bearing part that fits with the small powder hammer.

[0016] Optionally, the driving mechanism includes a handle, a transmission gear set, and a drive gear. The handle drives the drive gear to rotate through the transmission gear set, and the small powder hammer is provided with a rack that meshes with the drive gear.

[0017] Optionally,

[0018] The large powder hammer is provided with a guide rod on its outer side, and an elastic element is sleeved on the guide rod;

[0019] The handle is equipped with a reset torsion spring.

[0020] Optionally, the powder-guiding section is inclined, and a first axial groove is provided between the inner wall of the powder-falling section and the outer wall of the small powder hammer; a second axial groove is provided between the outer wall of the powder-falling section and the inner wall of the large powder hammer.

[0021] This utility model provides a coffee machine, including the coffee powder guiding device described in any of the above-mentioned claims.

[0022] The beneficial effect of this utility model is that the coffee powder guiding device of this application designs the powder hammer assembly into a small powder hammer and a large powder hammer, and the powder guiding tube is designed with a powder guiding section and a powder dropping section, wherein the powder dropping section is located between the small powder hammer and the large powder hammer. The coffee powder first enters the powder guiding section, then enters the powder dropping section through the powder passage along the powder guiding section, and finally exits from the powder outlet at the end of the powder dropping section. Because the powder dropping section is located in the gap between the small powder hammer and the large powder hammer, and the powder outlet at the end of the powder dropping section is formed between the small powder hammer and the large powder hammer, the coffee powder discharged from the powder outlet is concentrated in the area near the center, which is conducive to forming a uniform powder pile.

[0023] By applying the technical solution provided in this utility model embodiment, the powder dropping section is located between the two hammers, and the powder guide tube guides the coffee powder to flow out in the center, which can achieve uniform powder distribution, provide a basis for uniform tamping, make the powder cake density consistent, and ensure uniform water penetration during extraction, reduce channel effect, and improve extraction rate and flavor stability.

[0024] This utility model also provides a coffee machine, including any of the above-mentioned coffee powder guiding devices. Since the above-mentioned coffee powder guiding devices have the aforementioned technical effects, the coffee machine having such a device should also have the corresponding technical effects. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the coffee powder guiding device provided in a specific embodiment of the present invention.

[0027] Figure 2 A cross-sectional schematic diagram of a coffee powder guiding device;

[0028] Figure 3 Another cross-sectional view of the coffee powder guiding device;

[0029] Figure 4 This is a schematic diagram of the powder hammer assembly.

[0030] Figure 5 This is a cross-sectional schematic diagram of the powder hammer assembly;

[0031] Figure 6 This is a schematic diagram of the powder guide tube.

[0032] Figure 7 This is a schematic diagram of a coffee powder guiding device provided in a specific embodiment of the present invention applied to a coffee machine.

[0033] Figure label:

[0034] 1-Powder guide tube; 11-Powder guiding section; 12-Powder passage hole; 13-Powder dropping section; 14-Powder outlet; 2-Small powder hammer; 21-Pressure plate; 22-Pressure edge; 3-Large powder hammer; 31-Pressure plate; 32-Pressure edge; 4-Function funnel; 5-Handle; 6-Reset torsion spring; 7-Drive gear; 8-Elastic element; 9-Machine frame. Detailed Implementation

[0035] The core of this utility model is to provide a coffee powder guiding device that allows coffee powder to form a uniform powder pile, ensuring that the coffee puck is flat and compacted evenly throughout; another core aspect of this utility model is to provide a coffee machine that includes the above-mentioned coffee powder guiding device, which has the same beneficial effects as the coffee powder guiding device.

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] In one specific embodiment, please refer to Figures 1 to 7 The coffee powder guiding device provided by this utility model includes a powder hammer assembly and a powder guiding tube 1. The powder hammer assembly adopts a coaxial nested double hammer structure, including a small powder hammer 2 and a large powder hammer 3 coaxially arranged. The large powder hammer 3 is located outside the small powder hammer 2, and the bottom surfaces of the small powder hammer 2 and the large powder hammer 3 together form a pressing surface. In this embodiment, the large powder hammer 3 is located outside the small powder hammer 2. The large powder hammer 3 may only cover part of the outer shell of the small powder hammer 2, or the large powder hammer 3 may cover the entire outer shell of the small powder hammer 2. The powder guiding tube 1 includes a powder guiding section 11 and a powder dropping section 13. A powder passage hole 12 is provided at the connection between the powder guiding section 11 and the powder dropping section 13. Coffee powder enters the powder dropping section 13 through the powder guiding section 11 and the powder passing through the powder passage hole 12. The powder dropping section 13 is located between the small powder hammer 2 and the large powder hammer 3. A powder outlet 14 is provided at the end of the powder dropping section 13, and the coffee powder is finally discharged through the powder outlet 14. In this embodiment, the powder-dropping section 13 is located between the small powder hammer 2 and the large powder hammer 3, that is, a gap is left between the small powder hammer 2 and the large powder hammer 3, and the powder-dropping section 13 is installed in the gap.

[0038] It should be noted that the coffee powder first enters the powder-feeding section 11, then passes through the powder-feeding hole 12 into the powder-feeding section 13, and finally exits from the powder outlet 14 at the end of the powder-feeding section 13. Since the powder-feeding section 13 is located in the gap between the small powder hammer 2 and the large powder hammer 3, the coffee powder is forced to be guided closer to the center, forming a uniform powder pile.

[0039] After the coffee grounds are collected, the tamping surface formed by the bottom surfaces of the small tamping hammer 2 and the large tamping hammer 3 is used to compact the coffee grounds. Because the coffee grounds form a uniform pile under the guidance of the powder guide tube 1, a uniform, flat, and consistent density puck can be formed without manual assistance during tamping. This avoids the existing problems of uneven coffee grounds causing skewed pucks and inconsistent compaction density, thus preventing the channeling effect caused by inconsistent coffee pucks from affecting the quality of the extracted coffee liquid. This provides a foundation for the subsequent extraction of high-quality, flavorful coffee.

[0040] By applying the technical solution provided in this utility model embodiment, the coffee tamping assembly is designed as a double-hammer structure of a small coffee tamping 2 and a large coffee tamping 3. The gap between the two coffee tamping 3 provides an installation base for the coffee guide tube 1, so that the coffee outlet 14 at the end of the coffee guide tube 1 can be located between the two hammers. This facilitates the guidance of coffee powder discharged from the coffee outlet 14 to a region closer to the center, achieving a uniform distribution of coffee powder. This makes it easier to obtain a coffee cake with a uniform density during subsequent tamping, and ensures uniform water penetration during extraction, reducing channeling effects and improving extraction rate and flavor stability.

[0041] The following description will be based on a specific application scenario of the coffee powder guiding device in this embodiment.

[0042] In a specific coffee machine, the coffee powder guiding device of this embodiment is used in conjunction with the funnel 4. That is, the funnel 4 is installed below the coffee powder guiding device in this embodiment, so that the coffee powder discharged from the powder outlet 14 can fall into the funnel 4. Since the powder dropping section 13 of the guiding tube 1 in this embodiment is located between the small powder hammer 2 and the large powder hammer 3, the powder outlet 14 at the end of the powder dropping section 13 is also located between the small powder hammer 2 and the large powder hammer 3. This allows the coffee powder discharged from the powder outlet 14 to fall into the funnel 4 near its central area, achieving uniform distribution of coffee powder in the funnel 4. Compared with the existing method where the powder outlet 14 is located at the edge of the funnel 4, the uniform distribution of coffee powder is significantly improved.

[0043] After the coffee powder is collected in funnel 4, the tamping assembly tamps the coffee powder in funnel 4. Due to the guiding effect of the powder guide tube 1, the coffee powder in funnel 4 is evenly distributed, resulting in a flat and uniform coffee puck after tamping. This reduces the channeling effect caused by inconsistent puck density during subsequent coffee extraction, resulting in high-quality coffee.

[0044] To reduce coffee powder scattering when the funnel 4 receives coffee powder, the powder dropping section 13 is designed to be close to the funnel 4, reducing the gap between them and minimizing coffee powder scattering outwards. This improves the accuracy of the coffee powder quantity provided and keeps the area clean when using the coffee machine. Furthermore, in this embodiment, the powder guide tube 1 is designed to be nested with the powder hammer assembly, reducing the space occupied and improving the overall compactness of the coffee machine.

[0045] In some embodiments, the coffee powder guiding device provided by this utility model further includes a driving mechanism. The driving mechanism is connected to the small powder hammer 2. After the driving mechanism drives the small powder hammer 2 to move until its bottom surface is flush with the bottom surface of the large powder hammer 3, it continues to drive the small powder hammer 2 and the large powder hammer 3 to move and compact the coffee powder. When the driving mechanism drives the small powder hammer 2 to move relative to the axis of the large powder hammer 3, the powder passage hole 12 is blocked or opened by the small powder hammer 2.

[0046] It should be explained that the drive mechanism includes a power source and a transmission mechanism. The power source can be manual or electric, for example, manually operated using a handle 5, or automatically operated using a motor, servo cylinder, etc. That is, this embodiment is applicable to both manual and automatic powder compaction. The transmission mechanism of the drive mechanism is connected to the small powder hammer 2. During the compaction process, initially only the small powder hammer 2 is driven to move in the compaction direction, causing it to move axially relative to the large powder hammer 3. After the bottom surface of the small powder hammer 2 is flush with the bottom surface of the large powder hammer 3, the drive mechanism drives the small powder hammer 2 and the large powder hammer 3 together to move in the compaction direction, completing the compaction. In this embodiment, only the drive mechanism drives the small powder hammer 2 to move, and then the small powder hammer 2 drives the large powder hammer 3 to move, which reduces the complexity of the drive mechanism, simplifies the structure, and helps reduce manufacturing and assembly costs.

[0047] It should also be explained that the outer wall of the large tamping hammer 3 has a notch or groove corresponding to the powder-drawing section 11, and the powder-dropping section 13 is fitted inside the large tamping hammer 3, with the powder-drawing section 11 extending out from the notch or groove. The outer diameter of the small tamping hammer 2 matches the inner diameter of the powder-dropping section 13, and the powder-passing hole 12 is located on the sliding path of the outer wall of the small tamping hammer 2. When the small tamping hammer 2 is in the initial state, the small tamping hammer 2 and the powder-passing hole 12 are staggered, and the powder-passing hole 12 is in the open state, allowing the coffee powder from the powder-drawing section 11 to enter the powder-dropping section 13 through the open powder-passing hole 12; when the small tamping hammer 2 is in the tamping state, as the small tamping hammer 2 moves, it will gradually cover the powder-passing hole 12 until the powder-passing hole 12 is completely blocked by the small tamping hammer 2.

[0048] When the small powder hammer 2 moves until its bottom surface is flush with the bottom surface of the large powder hammer 3, the bottom surfaces of the small powder hammer 2 and the large powder hammer 3 together form a tamping surface. The two continue to move in the tamping direction as a whole to compact the coffee powder.

[0049] The above structure opens and closes the powder passage 12 through the small powder hammer 2. The axial displacement of the small powder hammer 2 acts as a valve. It can achieve powder falling and powder cutting switching without the need for an additional solenoid valve or rotating baffle. The number of system parts is reduced, the failure rate is reduced, the assembly space is reduced, and the cost is reduced.

[0050] In some embodiments, the small powder hammer 2 is provided with a pressing part, and the large powder hammer 3 is provided with a bearing part. When the small powder hammer 2 moves to the bottom surface being flush with the bottom surface of the large powder hammer 3, the pressing part abuts against the bearing part.

[0051] It should be noted that the hammer body of the small powder hammer 2 has an outwardly extending portion to form a pressing part, which can be a flange, a step, an annular shoulder, or evenly distributed protrusions. Alternatively, the outer side of the hammer body of the small powder hammer 2 has an inwardly recessed portion to form a pressing part. For example, the hammer body of the small powder hammer 2 is a semi-cylinder formed by a semi-circular arc surface and a vertical surface, which ensures good guiding effect and reduces weight. Furthermore, the bottom surface of the hammer body of the small powder hammer 2 is designed to be circular to facilitate cooperation with the large powder hammer 3 to form a complete powder pressing surface. The inner hole of the hammer body of the large powder hammer 3 is a cylindrical hole, and the powder dropping section 13 of the powder guide tube 1 is a cylindrical ring. The hammer body of the small powder hammer 2, the powder dropping section 13, and the hammer body of the large powder hammer 3 are sequentially and intermittently fitted together to ensure smooth axial relative movement.

[0052] Correspondingly, the large powder hammer 3 is designed with a pressure-bearing part on its inner wall or end face. This pressure-bearing part can protrude or be recessed relative to the inner wall / end face of the large powder hammer 3 to cooperate with the downward pressing part of the small powder hammer 2. For example, when the downward pressing part is a protruding structure, the pressure-bearing part can be designed as a recessed or protruding structure, such as an inner protruding ring or a shoulder; or, when the downward pressing part is a recessed structure, the pressure-bearing part can be designed as a protruding structure. When the small powder hammer 2 moves to the point where its bottom surface is flush with the bottom surface of the large powder hammer 3, the downward pressing part and the pressure-bearing part form a surface-to-surface or line-to-surface contact, achieving rigid force transmission.

[0053] As can be seen from the above, the small powder hammer 2 drives the large powder hammer 3 to move through the contact and cooperation between the pressing part and the bearing part. The independent driving or complex linkage mechanism of the large powder hammer 3 is eliminated. Only one linear power source is needed to realize the compound action of the small powder hammer 2 first independently and then the small powder hammer 2 and the large powder hammer 3 synchronously. The number of parts is reduced and the cost is reduced.

[0054] In some embodiments, the pressing part includes a pressure plate 21 disposed on the upper part of the small powder hammer 2. Specifically, the pressure plate 21 may be a horizontal or slightly tapered annular plate or a symmetrical straight plate, integrally formed or threadedly locked to the upper outer edge of the small powder hammer 2, and its outer diameter is larger than the inner diameter of the large powder hammer 3.

[0055] The pressure-bearing part includes a pressure plate 31 located on top of the large powder hammer 3. Specifically, the pressure plate 31 can be configured as an annular plate corresponding to the position of the pressure plate 21, located on the inner side or upper end face of the top of the large powder hammer 3, and arranged in a mirror image of the pressure plate 21. Preferably, the contact surfaces of the pressure plate 21 and the pressure plate 31 can be polished or fitted with low-friction pads.

[0056] And / or, the pressing part includes a pressing edge 22 provided on the bottom edge of the small powder hammer 2, the pressing edge 22 being an annular surface extending inward from the bottom edge of the small powder hammer 2, used to directly press the large powder hammer 3 at the end of the stroke.

[0057] The pressure-bearing part includes a pressure-bearing edge 32 located at the inner end of the large powder hammer 3. The pressure-bearing edge 32 is an annular shoulder or evenly distributed boss extending inward from the lower end of the inner wall of the large powder hammer 3, and is axially aligned with the pressure edge 22. The pressure-bearing edge 32 also serves as part of the bottom surface of the large powder hammer 3, improving local rigidity and reducing the end gap between the large powder hammer 3 and the small powder hammer 2, avoiding gaps in the powder pressing surface caused by the gap between the two, and improving the powder pressing effect.

[0058] When the small powder hammer 2 moves to the point where its bottom surface is flush with the bottom surface of the large powder hammer 3, the pressure plate 21 abuts against the pressure plate 31, and / or the pressure edge 22 abuts against the pressure edge 32. These two force transmission methods can be used individually or simultaneously. Depending on the working conditions, a single or dual-path transmission of the powder-pressing force can be selected. For example, under light loads, either the pressure plate 21 abuts against the pressure plate 31 or the pressure edge 22 abuts against the pressure edge 32, resulting in a simple structure and reduced friction pairs. Under heavy loads, simultaneous abutment at both the top and bottom points achieves dual-path force transmission, improving load-bearing capacity and resistance to eccentric loads. The double-ring contact surface disperses the powder-pressing force over a larger area, significantly reducing local stress concentration under high-pressure conditions, preventing local deformation, and extending component life.

[0059] In some embodiments, the axial distance between the pressure plate 21 and the bearing plate 31 is equal to the axial distance between the pressure edge 22 and the bearing edge 32. This axial distance is also the idle stroke length of the small powder hammer 2 relative to the large powder hammer 3. Once the small powder hammer 2 has completed its idle stroke length, the pressure plate 21 and the bearing plate 31, and the pressure edge 22 and the bearing edge 32 simultaneously come into contact, and the thrust of the drive mechanism switches from the single small powder hammer 2 to the entire powder hammer assembly of the small powder hammer 2 and the large powder hammer 3. After the upper and lower parts come into contact, two symmetrical force paths are formed, so that the large powder hammer 3 is subjected to uniform force and avoids stress concentration on one side. At the same time, when the upper pressure plate 21 and the lower pressure edge 22 come into contact at the same time, a double-ring force transmission surface is formed. The small powder hammer 2 is constrained by the upper and lower ring surfaces, automatically correcting the coaxiality with the large powder hammer 3, and significantly reducing the uneven wear caused by lateral clearance.

[0060] In some embodiments, the end of the powder-feeding section 13 and the end of the large powder hammer 3 are fitted with a conical surface. For example, the lower outer wall of the powder-feeding section 13 and the lower end of the inner hole of the large powder hammer 3 are provided with mutually fitting outer and inner conical surfaces, forming a coaxial conical surface pair. After the powder-feeding section 13 and the end of the large powder hammer 3 are fitted with conical surfaces, the powder-feeding port is covered by the conical surface of the end of the large powder hammer 3, forming a hidden powder outlet channel. When the small powder hammer 2 descends to be flush with the bottom surface of the large powder hammer 3, the powder-feeding port is completely submerged in the interior of the large powder hammer 3, realizing the instantaneous closure of the powder path, avoiding damage to the integrity of the powder pressing surface due to the gap formed by the existence of the powder path, and improving the powder pressing effect.

[0061] The conical surface at the end of the large powder hammer 3 forms a pressure-bearing part that mates with the small powder hammer 2. For example, the width of the inner conical surface is greater than the width of the outer conical surface, and the end of the inner conical surface extends beyond the end of the outer conical surface, forming a pressure-bearing edge 32. The end of the small powder hammer 2 has a pressure edge 22 with an outer conical shape corresponding to the pressure edge 32. The pressure edge 32 and the pressure edge 22 also form a coaxial conical surface pair. The inner conical surface of the large powder hammer 3 not only serves as a pressure-bearing part but also receives downward pressure from the small powder hammer 2 when it descends to the bottom surface.

[0062] As described above, the conical joint provides a self-centering function, ensuring that the axes of the small powder hammer 2, the large powder hammer 3, and the powder dropping section 13 always coincide, eliminating the off-center load caused by lateral clearance. The force is sequentially transferred to the coffee powder through the bottom edge of the small powder hammer 2, the conical end of the large powder hammer 3, and the powder hammer assembly. The large area of ​​the conical bearing part evenly transmits the load, resulting in uniform stress distribution, consistent coffee powder density, and prevention of local crushing.

[0063] In some embodiments, the drive mechanism includes a handle 5, a transmission gear set and a drive gear 7. The handle 5 drives the drive gear 7 to rotate through the transmission gear set, and the small powder hammer 2 is provided with a rack that meshes with the drive gear 7.

[0064] It should be explained that the handle 5 is mounted on one side of the coffee machine body, and the transmission gear set is a single or multi-stage reduction gear set, fixed to the machine frame 9, used to reverse, slow down, and amplify the torque of the rotational motion of the handle 5. The drive gear 7 is coaxial with the last stage of the transmission gear set and extends to the rack meshing area of ​​the small powder hammer 2; the tooth profile is mostly straight or helical, and the module is designed according to the required tamping force. The rack is milled or fitted along the axis of the small powder hammer 2, and its length covers the sum of the idle stroke and the final tamping stroke.

[0065] Preferably, the transmission gear set can be a worm gear pair or a helical gear with a backstop pawl to prevent the handle 5 from rebounding and ensure that the powder pressing force is maintained.

[0066] In some embodiments, a guide rod is provided on the outer side of the large powder hammer 3. Specifically, the guide rod is symmetrically arranged on at least two optical axes or splined shafts on the outer wall of the large powder hammer 3, parallel to the hammer body axis. An elastic element 8 is sleeved on the guide rod. Specifically, the elastic element 8 can be a cylindrical compression spring or a butterfly spring assembly. The upper end is fixed on the spring seat of the large powder hammer 3, and the lower end is fixed on the spring seat of the machine frame 9. It has a preset constant compression amount during installation, which is used to adjust the powder pressing force during powder pressing. After powder pressing, the elastic force of the elastic element 8 can reset the large powder hammer 3. A reset torsion spring 6 is provided inside the handle 5. The free angle of the reset torsion spring 6 is pre-tightened, so that the handle 5 is subjected to torque in the reset direction, realizing the release and reset of the handle 5.

[0067] In some embodiments, the powder guiding section 11 is inclined, allowing the coffee powder to slide naturally into the powder dropping section 13 under the combined action of gravity and the inclined plane, maintaining a continuous and smooth powder flow without additional vibration or blowing. Due to the asymmetrical shape of the powder guiding tube 1, the powder guiding tube 1 is fixed and also serves as a common guide rail for the small powder hammer 2 and the large powder hammer 3.

[0068] A first axial groove pair is provided between the inner wall of the powder falling section 13 and the outer wall of the small powder hammer 2. For example, the inner wall of the powder falling section 13 and the outer wall of the small powder hammer 2 are provided with a first axial groove and a first axial rail that cooperate with each other. After the first axial groove and the first axial rail are nested and connected, they form a sliding pair, which ensures that the small powder hammer 2 can move purely axially relative to the powder falling section 13, while completely preventing circumferential rotation, and ensuring that the rack-gear meshing is not affected by lateral forces.

[0069] A second axial groove is provided between the outer wall of the powder falling section 13 and the inner wall of the large powder hammer 3. For example, the outer wall of the powder falling section 13 and the inner wall of the large powder hammer 3 are provided with a second axial groove and a second axial rail that cooperate with each other. The second axial groove and the second axial rail are nested and connected to form a sliding pair, so that the large powder hammer 3 can only slide along the axial direction of the powder falling section 13. This not only prevents circumferential deflection, but also uses the powder falling section 13 itself as an additional guide post for the large powder hammer 3. The coaxial accuracy can be maintained even without the traditional outer guide rod.

[0070] The inclined feed section 11 continuously guides coffee powder into the feed section 13. The feed section 13, through the first and second track pairs, simultaneously constrains the movement trajectories of the small and large powder hammers 2 and 3. The small and large powder hammers 2 and 3 share the same axis with the feed section 13, and the powder path and power path are coaxial and aligned, achieving centered powder distribution and uniform tamping. The track pairs convert all the tangential force generated by the gear-rack meshing and the lateral force of the return torsion spring 6 into axial force, transmitting almost no torque to the powder path, thus avoiding disturbance to the powder flow or wear of the track.

[0071] Based on the coffee powder guiding device provided in the above embodiments, this utility model also provides a coffee machine, which includes any one of the coffee powder guiding devices in the above embodiments. Since this coffee machine uses the coffee powder guiding device in the above embodiments, the beneficial effects of this coffee machine are explained in the above embodiments. The structure of other parts of this coffee machine is explained in the prior art and will not be repeated here.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The coffee machine and coffee powder guiding device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, this utility model is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coffee powder guiding device, characterized in that, include: The powder hammer assembly includes a small powder hammer (2) and a large powder hammer (3) arranged coaxially. The large powder hammer (3) is located outside the small powder hammer (2). The bottom surfaces of the small powder hammer (2) and the large powder hammer (3) together form a powder pressing surface. The powder guide tube (1) includes a powder guiding section (11) and a powder dropping section (13). A powder passage hole (12) is provided at the connection between the powder guiding section (11) and the powder dropping section (13). A powder outlet (14) is provided at the end of the powder dropping section (13). The powder dropping section (13) is located between the small powder hammer (2) and the large powder hammer (3).

2. The coffee powder guiding device according to claim 1, characterized in that, It also includes a driving mechanism, which is connected to the small powder hammer (2). The driving mechanism drives the small powder hammer (2) to move until its bottom surface is flush with the bottom surface of the large powder hammer (3), and then continues to drive the small powder hammer (2) and the large powder hammer (3) to move and compact the coffee powder. When the driving mechanism drives the small powder hammer (2) to move relative to the axis of the large powder hammer (3), the powder passage hole (12) is blocked or opened by the small powder hammer (2).

3. The coffee powder guiding device according to claim 2, characterized in that, The small powder hammer (2) is provided with a pressing part, and the large powder hammer (3) is provided with a bearing part. When the small powder hammer (2) moves to the bottom surface being flush with the bottom surface of the large powder hammer (3), the pressing part abuts against the bearing part.

4. The coffee powder guiding device according to claim 3, characterized in that, The pressing part includes a pressing plate (21) provided on the upper part of the small powder hammer (2), and / or a pressing edge (22) provided on the bottom edge of the small powder hammer (2). The pressure-bearing part includes a pressure-bearing plate (31) disposed on the top of the large powder hammer (3), and / or a pressure-bearing edge (32) disposed at the inner end of the large powder hammer (3). When the small powder hammer (2) moves to the point where its bottom surface is flush with the bottom surface of the large powder hammer (3), the pressure plate (21) abuts against the pressure plate (31), and / or the pressure edge (22) abuts against the pressure edge (32).

5. The coffee powder guiding device according to claim 4, characterized in that, The axial distance between the pressure plate (21) and the bearing plate (31) is equal to the axial distance between the pressure edge (22) and the bearing edge (32).

6. The coffee powder guiding device according to claim 3, characterized in that, The end of the powder-falling section (13) and the end of the large powder hammer (3) are fitted with a conical surface; the conical surface at the end of the large powder hammer (3) forms the pressure-bearing part that fits with the small powder hammer (2).

7. The coffee powder guiding device according to claim 2, characterized in that, The driving mechanism includes a handle (5), a transmission gear set and a drive gear (7). The handle (5) drives the drive gear (7) to rotate through the transmission gear set. The small powder hammer (2) is provided with a rack that meshes with the drive gear (7).

8. The coffee powder guiding device according to claim 2, characterized in that, The large powder hammer (3) is provided with a guide rod on its outer side, and an elastic element (8) is sleeved on the guide rod.

9. The coffee powder guiding device according to claim 2, characterized in that, The powder-drawing section (11) is inclined, and a first axial groove is provided between the inner wall of the powder-falling section (13) and the outer wall of the small powder hammer (2); a second axial groove is provided between the outer wall of the powder-falling section (13) and the inner wall of the large powder hammer (3).

10. A coffee machine, characterized in that, Includes the coffee powder guiding device according to any one of claims 1 to 9.

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