Automatic compacting device and coffee machine

Abstract

The application relates to the technical field of coffee machines, in particular to an automatic powder pressing device and a coffee machine. The automatic powder pressing device comprises a machine body, a bean grinding assembly, a powder pressing mechanism and a hopper assembly. The powder ground by the bean grinding assembly falls into a powder bowl through a powder channel. The powder pressing mechanism is rotated by a powder pressing motor assembly and a gear box assembly, and drives a transmission shaft C to rotate in a circumferential direction. The transmission shaft C is axially slidably connected to the machine body, the bottom of the transmission shaft C extends into the powder bowl and is fixedly connected to a powder pressing assembly. The coffee powder falling into the powder bowl is scraped and compacted by the rotation of a powder pressing ring. Meanwhile, the compacted powder lifts the powder pressing ring upward, the transmission shaft C drives a jacking rod to move axially, and a trigger mechanism is arranged above the jacking rod. The application provides an automatic powder pressing device and a coffee machine which can realize high-quality extraction, control powder pressing strength and powder compactness and have an automatic powder pressing function.

Description

Technical Field

[0001] This application relates to the field of coffee machine technology, and more particularly to an automatic tamping device and a coffee machine. Background Technology

[0002] In related technologies, most existing coffee maker grinders and pressure espresso machines lack automatic tamping functions, relying instead on manual tamping. However, controlling the tamping pressure and density is difficult, easily leading to channeling effects and resulting in suboptimal coffee quality, such as over-extraction or under-extraction. The few existing grinders and pressure espresso machines with automatic tamping typically use a straight-line tamping method without a distribution function. Similarly, controlling the tamping pressure and achieving the required density is challenging, making it difficult to guarantee the quality and flavor of the extracted coffee. Therefore, both existing manual and automatic tamping coffee makers in related technologies have significant shortcomings. Utility Model Content

[0003] In order to overcome the shortcomings of related technologies, this application provides an automatic tamping device and a coffee machine.

[0004] In the first aspect, this application provides an automatic powder pressing device, which adopts the following technical solution: Includes: main body, grinding assembly, tamping mechanism, and funnel assembly; The machine body is provided with a shell; the funnel assembly is provided with a powder bowl; The grinding component grinds coffee beans, which then feed the powder through the powder channel into the powder bowl. The tamping mechanism includes a tamping assembly, a drive shaft C, a push rod, and a tamping motor assembly. The tamping motor assembly drives the drive shaft C to rotate circumferentially. The drive shaft C is axially slidably connected to the machine body. The bottom of the drive shaft C extends into the coffee bowl and is fixedly connected to the tamping assembly. The top of the drive shaft C is connected to the push rod and elastically connected to the machine body through a spring C. A triggering mechanism is provided at the top of the push rod. The tamping assembly is provided with a tamping ring, and the tamping ring is provided with blades. The blades rotate to scrape and compact the coffee powder.

[0005] Furthermore, the tamping assembly also includes a tamping ring, with a scraper ring mounted on it. The rotation of the tamping motor assembly drives the gearbox assembly to rotate, which in turn drives the drive shaft C to rotate circumferentially. The bottom of the drive shaft C is fixedly connected to the tamping ring. The rotation of the tamping motor assembly drives the tamping ring to rotate, and the coffee powder falling into the coffee bowl is scraped and compacted by the rotation of the tamping ring. At the same time, the compacted powder lifts the tamping ring upward, causing the drive shaft C to move upward, which in turn moves the push rod axially.

[0006] Furthermore, the gearbox assembly includes a small double gear, a large double gear, and a large gear. The small double gear meshes with the large double gear, and the large double gear meshes with the large gear. When the powder pressing motor assembly rotates, the small double gear in the gearbox assembly drives the large double gear to rotate, and the large double gear drives the large gear to rotate. The drive shaft A is located inside the large gear and is coaxially and fixedly connected to the large gear, driving the drive shaft A to rotate. The drive shaft B is mounted on the drive shaft A, and the drive shaft C is mounted on the drive shaft B, driving the drive shaft C to rotate.

[0007] Furthermore, the triggering mechanism includes a hinge plate and a micro switch. The hinge plate is hinged to the housing, and the actuating rod actuates the hinge plate to rotate, triggering the micro switch.

[0008] Furthermore, the micro switch is set in the groove of the micro switch movable bracket, the micro switch movable bracket is mounted on the two cylinders of the gearbox cover, the two springs B are also mounted on the two cylinders of the gearbox cover, and the washer screws are locked on the two cylinders of the gearbox cover.

[0009] Furthermore, the micro switch is mounted on two cylinders, the micro switch movable bracket and the gearbox cover, via spring B. The actuating rod moves axially upward, pushing the hinge plate upward, causing the hinge plate to rotate and trigger the micro switch.

[0010] Furthermore, the powder scraping ring includes a first rotating shaft, a powder scraping bracket, and two uprights, and the powder scraping ring is integrally formed; the powder pressing ring includes an integrally formed second rotating shaft, a flat blade, and a raised blade, the first rotating shaft and the second rotating shaft are snapped together, the flat blade and the raised blade are respectively provided with circular limiting grooves, and are respectively fixedly connected to the two uprights of the powder scraping ring; the inner wall of the second rotating shaft is threaded to the drive shaft C or polygonally sleeved.

[0011] Furthermore, a retaining spring is provided in the inner mounting groove of the funnel assembly.

[0012] Furthermore, when the inner wall of the second rotating shaft is fitted with the polygonal sleeve of the transmission shaft C, a retaining ring is provided in the groove of the pressing ring of the pressing ring and the groove of the connecting post of the transmission shaft C.

[0013] Secondly, this application provides a coffee machine, which includes the aforementioned automatic tamping device.

[0014] This application has at least one of the following beneficial effects: 1. This application utilizes a gearbox assembly, along with the coaxial transmission shafts A, B, and C, and a powder pressing ring structure. While the grinding assembly grinds the powder, the powder pressing motor assembly also rotates, causing the powder pressing ring to rotate. The compacted powder lifts the powder pressing ring upwards. The powder pressing ring performs both rotational motion and passive upward linear motion, achieving consistent pressing force and density throughout the powder pressing process.

[0015] 2. In this application, the leveling and compaction of coffee powder during tamping is achieved by an irregularly shaped tamping ring, which includes flat blades and curved blades. During rotation, the flat blades and curved blades work together to level and compact the coffee powder. The structure is simple and the work efficiency is high, ensuring the tamping force and powder density, avoiding over-extraction or under-extraction in the later stage, and ensuring high-quality extracted coffee.

[0016] 3. This application provides an automatic tamping device and coffee machine that can achieve high-quality extraction and control the tamping force and density of the coffee powder, and has an automatic tamping function. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0018] Figure 2 This is an exploded view of the overall structure of an embodiment of this application.

[0019] Figure 3 This is a top view of the overall structure of an embodiment of this application.

[0020] Figure 4 This is a cross-sectional view of the overall structure of an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the untriggered structure of the micro switch according to an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the microswitch triggering structure according to an embodiment of this application.

[0023] Figure 7 Examples of this application Figure 5 An enlarged schematic diagram of part A of the structure.

[0024] Figure 8 Examples of this application Figure 6 An enlarged schematic diagram of part B of the structure.

[0025] Figure 9 This is a schematic diagram of the drive shaft A, drive shaft B, drive shaft C and jacking rod structure according to an embodiment of this application.

[0026] Figure 10 This application provides a schematic diagram of the structure of the powder scraper and the powder pressing ring.

[0027] Figure 11 This is a cross-sectional view of the snap ring structure according to an embodiment of this application.

[0028] Reference numerals: 1. Grinding assembly; 2. Tamper support; 3. Scraper ring; 4. Tamper ring; 5. Funnel support; 6. Funnel support decorative ring; 7. Powder bowl; 8. Bowl spring; 9. Funnel assembly; 10. Powder channel cover; 11. Powder channel; 18. Microswitch; 20. Gearbox support; 21. Tamper motor assembly; 22. Gearbox cover; 23. Hinge plate; 24. Washer A; 25. Washer B; 26. Microswitch movable bracket; 27. Spring B; 28. Screw with washer; 29. ​​Small double gear; 30. Large double gear; 31. Large gear; 32. Gearbox body; 33. Washer C; 34. Push rod; 35. Sliding bearing A; 36. Washer D; 37. Sliding bearing B; 38. Drive shaft A; 3 9. Drive shaft B; 40. Washer E; 41. Sliding bearing seat; 42. Wool felt seat; 43. Wool felt ring; 44. Spring C; 45. Drive shaft C; 46. Fixing pin A; 47. Fixing pin B; 48. Snap ring; 91. Inner mounting groove; 101. Bottom inner groove; 102. Upper connecting part; 103. Limiting piece; 104. Central shaft; 105. Lower connecting part; 106. Top inner groove; 107. Outer flange; 108. Connecting column; 109. Push cap; 110. Connecting column groove; 301. First rotating shaft; 302. Powder scraper bracket; 303. Scraper blade; 304. Column; 401. Second rotating shaft; 402. Flat blade; 403. Raised blade; 404. Circular limiting groove; 405. Powder pressing ring groove. Detailed Implementation

[0029] The technical solutions of the embodiments of this application 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 application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0033] Example 1 Reference Figures 1-11 This application provides an automatic tamping device, including: a body, a grinding assembly 1, a tamping mechanism, and a funnel assembly 9; The body, on which a shell is provided; The grinding component 1 grinds coffee beans and the powder falls into the powder bowl 7 through the powder channel 11. The upper end of the powder channel 11 is connected to the grinding component 1, and the lower end of the powder channel 11 is connected to the tamping bracket 2. The powder pressing mechanism includes a powder pressing assembly, a drive shaft C45, a push rod 34, and a powder pressing motor assembly 21. The powder pressing motor assembly 21 drives the drive shaft C45 to rotate circumferentially. The drive shaft C45 is axially slidably connected to the machine body. The bottom of the drive shaft C45 extends into the powder bowl 7 and is fixedly connected to the powder pressing assembly. The top of the drive shaft C45 is connected to the push rod 34 and elastically connected to the machine body via a spring C44. A trigger mechanism is provided at the top of the push rod 34. The trigger mechanism controls the opening and closing of the micro switch 18.

[0034] The tamping assembly includes a scraper ring 3 and a tamping ring 4, with the scraper ring 3 mounted on the tamping ring 4. The tamping ring 4 is equipped with blades that rotate to scrape and compact the coffee powder. The bottom of the drive shaft C45 is fixedly connected to the tamping ring 4. The rotation of the tamping motor assembly 21 drives the tamping ring 4 to rotate, causing the coffee powder falling into the coffee bowl 7 to be scraped and compacted by the rotation of the tamping ring 4. At the same time, the compacted powder lifts the tamping ring 4, causing the drive shaft C45 to move upward, which in turn moves the push rod 34 upward.

[0035] The funnel support 5 and the funnel assembly 9 are located below the powder pressing mechanism. The powder pressing mechanism also includes a powder pressing support 2, and the funnel assembly 9 is disposed on the funnel support 5. The powder bowl 7 is disposed inside the funnel assembly 9, and the powder pressing support 2 is connected above the funnel support 5.

[0036] Specifically, refer to Figure 1 , Figure 2 , Figure 3and Figure 4 The grinding assembly 1 is equipped with a drive motor to drive the grinding assembly 1 to work and grind the beans; the grinding assembly 1 has a powder channel 11 on its side, and the powder ground by the grinding assembly 1 falls into the powder bowl 7 through the powder channel 11. The powder channel cover 10 is assembled with the powder channel 11. The powder channel 11 is inclined. The upper end of the powder channel 11 is fixedly connected to the powder outlet of the grinding assembly 1, and the lower end of the powder channel 11 is fixedly connected to the powder inlet of the powder pressing bracket 2.

[0037] Reference Figure 2 The powder pressing motor assembly 21 is fixedly disposed below the gearbox body 32 and the gearbox bracket 20. The gearbox body 32 and the gearbox bracket 20 are fixedly connected, and a gearbox cover 22 is provided on the gearbox body 32. The gearbox assembly includes a small double gear 29, a large double gear 30, and a large gear 31. The small double gear 29 and the large double gear 30 are fixed to the gearbox cover 22 by washers A24 and fixing pins B47, respectively.

[0038] Reference Figure 5 , Figure 6 and Figure 9The powder pressing motor assembly 21 rotates, driving the small double gear 29 to rotate. The small double gear 29 meshes with the large double gear 30, driving the large double gear 30 to rotate. The large double gear 30 meshes with the large gear 31, driving the large gear 31 to rotate. The transmission shaft A38 is located inside the large gear 31 and is coaxially and fixedly connected to it. The rotation of the large gear 31 drives the transmission shaft A38 to rotate. The transmission shaft A38 is provided with a hexagonal bottom groove 101 with an opening facing downwards. The transmission shaft B39 includes an upper connecting part 102, a limiting piece 103, a middle shaft 104, and a lower connecting part 105. The upper connecting part 102, the limiting piece 103, the middle shaft 104, and the lower connecting part 105 are arranged sequentially from top to bottom. The components are integrally molded, with both the upper connecting part 102 and the lower connecting part 105 being hexagonal prisms. The upper connecting part 102 of the drive shaft B39 is fitted into the bottom inner groove 101 of the drive shaft A38, and the drive shaft C45 is provided with an upward-opening hexagonal top inner groove 106. The lower connecting part 105 of the drive shaft B39 is fitted into the top inner groove 106 of the drive shaft C45, and the inner wall of the top inner groove 106 of the drive shaft C45 abuts against the outer wall of the lower connecting part 105 of the drive shaft B39. Both the drive shaft A38 and the drive shaft B39 are provided with a central hole. The top of the drive shaft C45 is provided with an outward flange 107, which limits the central shaft 104 of the drive shaft B39. The bottom of the drive shaft C45 is provided with a connecting post 108, which is used to fix and connect the powder pressing assembly. The actuating rod 34 is equipped with an actuating cap 109 and a rod portion. The rod portion passes through the center holes of the drive shaft A38 and drive shaft B39, and the bottom of the rod portion is inserted into the top inner groove 106 of the drive shaft C45. The actuating cap 109 rests on the top of the drive shaft A38 to prevent the actuating rod 34 from slipping into the drive shaft A38. When the large gear 31 rotates, it drives the drive shaft C45 to rotate, causing the drive shaft C45 to move circumferentially. At the same time, the powder pressing ring 4 drives the drive shaft C45 to move upward, causing the actuating rod 34 to move axially.

[0039] A sliding bearing A35 is disposed around the drive shaft A38, and a washer B25 is disposed between the bottom of the sliding bearing A35 and the top of the large gear 31. A washer C33 is disposed between the bottom of the large gear 31 and the bottom of the upper sliding bearing B37. A washer D36 is disposed between the gearbox bracket 20 and the limiting piece 103 of the drive shaft B39. There are two sliding bearings B37. The upper sliding bearing B37 is disposed on the outer wall of the drive shaft A38, isolating the drive shaft A38 and the gearbox bracket 20, and is disposed below the large gear 31 through washer C33. The lower sliding bearing B37 is disposed on the outer wall of the drive shaft C45, and a washer E40 is disposed on the top of the lower sliding bearing B37 and located below the outer flange 107 of the drive shaft C45. A sliding bearing seat 41 is disposed on the outer wall of the lower sliding bearing B37, and the washer E40 is also disposed on the top of the sliding bearing seat 41; the lower sliding bearing B37 and the sliding bearing seat 41 are fitted together. A wool felt 42 is provided at the bottom of the lower sliding bearing B37 and the sliding bearing seat 41, and a wool felt ring 43 is disposed inside the wool felt 42. The wool felt ring 43 and the wool felt 42 are respectively arranged around the drive shaft C45. The top of the wool felt 42 abuts against the bottom of the lower sliding bearing B37 and the sliding bearing seat 41, and the bottom of the wool felt 42 abuts against the top of the powder scraper ring 3. When the drive shaft C slides vertically up and down, the wool felt 42 and the wool felt ring 43 play the roles of sealing, buffering and distributing pressure evenly.

[0040] A spring C44 is installed on the outer wall of the drive shaft B39, and the spring C44 is located between the drive shaft B39 and the drive shaft C45. The two ends of the spring C44 abut against the limiting piece 103 of the drive shaft B39 and the outer flange of the drive shaft C45, respectively. When the drive shaft C45 pushes the push rod 34 to move axially upward, it compresses the spring C44. The spring C44 has elastic potential energy to apply pressure to the tamping ring 4 to compact the coffee powder.

[0041] The triggering mechanism includes a hinge plate 23 and a micro switch 18. The hinge plate 23 is hinged to the housing. The push rod 34 drives the hinge plate 23 to rotate, triggering the micro switch 18.

[0042] Specifically, hinge plate 23 is hinged to gearbox cover 22 by fixing pin A46. One end of hinge plate 23 is positioned above push rod 34. When drive shaft C45 pushes push rod 34 upward, the top of push rod 34 abuts against hinge plate 23, causing that end of hinge plate 23 to move upward and the other end of hinge plate 23 to move downward, contacting micro switch 18 and triggering micro switch 18. When micro switch 18 is triggered, the drive motor of grinding assembly 1 and the powder tamping motor assembly 21 stop working.

[0043] Preferably, the micro switch 18 is assembled in the groove of the micro switch movable bracket 26, the micro switch movable bracket 26 is mounted on the two cylinders of the gearbox cover 22, the two springs B27 are also mounted on the two cylinders of the gearbox cover 22, and the washer screws 28 are locked on the two cylinders of the gearbox cover 22.

[0044] Preferably, the micro switch 18 is mounted on two cylinders, the micro switch movable bracket 26 and the gearbox cover 22, via spring B27. The actuating rod 34 moves axially upward, pushing the hinge plate 23 upward to rotate clockwise. After rotating a certain angle, it presses down on the micro switch 18 and triggers it. The actuating rod 34 can also rotate clockwise by a certain angle.

[0045] The scraper ring 3 is assembled onto the pressing ring 4, forming a single unit. The scraper ring 3 is assembled onto the pressing ring 4 and together they are located inside the pressing bracket 2. The pressing ring 4 is inserted below the drive shaft C45, and the drive shaft C45 is fixedly connected to the pressing ring 4. A retaining spring 48 is simultaneously located between the drive shaft C45 and the pressing ring 4.

[0046] The tamping motor assembly 21 drives the tamping ring 4 to rotate. The coffee powder falling into the tamping bowl 7 is leveled and compacted by the rotation of the tamping ring 4. At the same time, the compacted powder will lift the tamping ring 4, which will drive the drive shaft C45 to move upward, and push the push rod 34 to move upward.

[0047] This application utilizes a gearbox assembly and a coaxial transmission structure consisting of drive shafts A38, B39, and C45, along with a powder pressing ring 4. Simultaneously, the powder grinding assembly grinds the powder, while the powder pressing motor assembly 21 rotates, causing the powder pressing ring 4 to rotate. The compacted powder lifts the powder pressing ring 4 upwards. The powder pressing ring 4 performs both rotational and passive upward linear motion, achieving consistent pressing force and density throughout the powder pressing process.

[0048] The funnel support 5 and the funnel assembly 9 are located below the powder pressing mechanism, with the funnel assembly 9 mounted on the funnel support 5; a decorative ring 6 is provided on the outside of the funnel support 5. The funnel assembly 9 is also equipped with a switch to control its opening and closing.

[0049] Reference Figure 2 The retaining spring 8 is fastened into the inner mounting groove 91 of the funnel assembly 9. The retaining spring 8 can be configured as an incomplete polygonal structure or a ring structure, with a small section missing. The outer ring of the retaining spring 8 is engaged within the inner mounting groove 91. The powder bowl 7 is fitted onto the funnel assembly 9. The powder bowl 7 and the funnel assembly 9 are positioned below the funnel support 5, and the powder pressing bracket 2 is connected to the funnel support 5.

[0050] Reference Figure 10 and Figure 11Preferably, the powder pressing assembly further includes a powder scraper ring 3, which includes a first rotating shaft 301, a powder scraper bracket 302, and two uprights 304. The first rotating shaft 301 extends from a downward-facing groove in the powder scraper bracket 302, and the powder scraper bracket 302 extends vertically downward from two uprights 304. The two uprights 304 are symmetrically arranged with respect to the first rotating shaft 301. The powder scraper ring 3 is integrally formed. The powder pressing ring 4 includes an integrally formed second rotating shaft 401, a flat blade 402, and a raised blade 403. Both the second rotating shaft 401 and the first rotating shaft 301 are provided with vertical directions. The hollow structure of the first rotating shaft 301 extends through the entire first rotating shaft 301, and the hollow structure of the second rotating shaft 401 is set as a hollow groove; the protrusion of the second rotating shaft 401 extends upward into the interior of the first rotating shaft 301, and the second rotating shaft 401 is engaged with the first rotating shaft 301 through the limiting groove of the protrusion structure; the outer wall of the second rotating shaft 401 and the inner wall of the hollow structure of the first rotating shaft 301 are in close contact; the flat blade 402 and the raised blade 403 are respectively provided with circular limiting grooves 404, which are fixedly connected to the two columns 304 of the powder scraping ring 3. In one embodiment, the hollow structure of the second rotating shaft 401 is configured as a hexagonal groove, and the inner wall is provided with a powder pressing ring groove 405. The connecting post 108 of the drive shaft C45 is configured as a hexagon. The connecting post 108 can be inserted into the hollow structure of the second rotating shaft 401. The outer wall of the connecting post 108 is provided with a connecting post groove 110 corresponding to the position of the powder pressing ring groove 405. The retaining spring 48 is disposed in the powder pressing ring groove 405 and the connecting post groove 110. The outer ring of the hexagonal retaining spring 48 is engaged in the powder pressing ring groove 405, and the inner ring of the retaining spring 48 is engaged in the connecting post groove 110. The hexagonal retaining spring 48 can also be configured as an incomplete hexagon with a small section missing. The retaining spring 48 is used to fix and connect the drive shaft C45 and the powder pressing ring 4. In another embodiment, the retaining ring 48 is not required. The connecting post 107 is a cylinder with threads, and the hollow structure of the second rotating shaft 401 is a circular groove with threads on the groove wall. The drive shaft C45 and the tamping ring 4 are fixedly connected by a threaded connection. The flat blade 402 is horizontally positioned to scrape and compact the coffee powder; the raised blade 403 has an inclined raised part for evenly distributing the powder; the rotation of the scraping ring 3 drives the tamping ring 4 to rotate synchronously.

[0051] The two uprights 304 of the coffee grinder 3 are each equipped with a scraper 303 extending outwards. The scraper 303 is used to scrape off the coffee grounds adhering to the side wall of the coffee bowl 7. During rotation, the flat blade and the curved blade work together to scrape and compact the coffee grounds. The structure is simple and the work efficiency is high, ensuring the tamping force and the density of the coffee grounds, thus avoiding over-extraction or under-extraction and ensuring high-quality extracted coffee.

[0052] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8With the upper surface of the opening of the powder bowl 7 as the reference plane, in the initial position, the powder pressing ring 4 is located 9mm below the reference plane of the powder bowl 7, and the micro switch 18 is not triggered; The highest point that the tamping ring 4 can reach in the vertical direction relative to the body, that is, the tamping ring 4 is located at the highest point of the powder bowl 7, 7mn below the reference plane of the powder bowl 7, and the micro switch 18 is triggered. If the powder bowl 7 moves up by a maximum of 0.5mm, the powder pressing ring 4 will be 6.5mm below the powder bowl 7, and the micro switch 18 will continue to be triggered; when the micro switch 18 is triggered, the micro switch movable bracket 26 moves down by 0.5mm.

[0053] If the powder bowl 7 moves up by a maximum of 1.0mm, the powder pressing ring 4 is located 6.0mm below the powder bowl 7, and the micro switch 18 continues to be triggered; when the micro switch 18 is triggered, the micro switch movable bracket 26 moves down by 1.0mm.

[0054] The working principle of this application embodiment is as follows: (a) The grinding component 1 grinds the beans and the powder falls into the powder bowl 7 through the powder channel 11; (ii) At the same time, the powder pressing motor assembly 21 rotates, which drives the large gear 31 through the small double gear 29 and the large double gear 30 of the gearbox assembly, thereby driving the transmission shaft A38 to rotate. (iii) Drive shaft B39 is mounted on drive shaft A38, and drive shaft C45 is mounted on drive shaft B39, which drives drive shaft C45 to rotate. At the same time, drive shaft C45 moves axially along its axis, and drive shaft C45 pushes push rod 34 to move axially. (iv) The hinge plate 23 is hinged to the gearbox cover 22 by the fixing pin A46, the snap ring 48 is fastened in the pressing groove 405 of the pressing ring 4, and the scraper ring 3 is assembled on the pressing ring 4 to form a whole. (v) The powder channel cover 10 is assembled with the powder channel 11, the upper end is assembled with the grinding component 1, and the lower end is assembled with the tamping bracket 2. (vi) The cup spring 8 is fastened in the inner mounting groove 91 of the funnel assembly 9, the powder bowl 7 is fitted on the funnel assembly 9, and the powder pressing bracket 2 is connected to the funnel bracket 5; the funnel assembly 9 is mounted on the funnel bracket 5, and the funnel assembly 9 is equipped with a switch to control the opening and closing of the funnel assembly 9. (vii) The tamping motor assembly 21 rotates, driving the tamping ring 4 to rotate. The coffee powder falling into the tamping bowl 7 is scraped and compacted by the rotation of the tamping ring 4. At the same time, the compacted powder will lift the tamping ring 4 upward, driving the drive shaft C45 to move upward, and pushing the push rod 34 to move upward. (viii) The micro switch 18 is assembled in the groove of the micro switch movable bracket 26. The micro switch movable bracket 26 is mounted on the two cylinders of the gearbox cover 22. The two springs B27 are also mounted on the two cylinders of the gearbox cover 22. The washer screw 28 is locked on the two cylinders of the gearbox cover 22. (ix) The micro switch 18 is mounted on the two cylinders of the micro switch movable bracket 26 and the gear box cover 22 by the spring B27. The push rod 34 moves axially upward, pushes the hinge plate 23 upward, and makes it rotate clockwise. After rotating a certain angle, it presses down on the micro switch 18 and triggers it. The push rod 34 can also rotate clockwise a certain angle.

[0055] In another embodiment, this application provides a coffee machine including the aforementioned automatic tamping device.

[0056] In summary, this application provides an automatic tamping device and coffee machine that can achieve high-quality extraction and control the tamping force and density of the coffee powder, and has an automatic tamping function.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic powder pressing device, characterized in that, include: Machine body, grinding assembly (1), tamping mechanism, funnel assembly (9); The machine body is provided with a shell; the funnel assembly is provided with a powder bowl (7); The grinding component (1) grinds beans and the powder falls into the powder bowl (7) through the powder channel (11); The tamping mechanism includes a tamping assembly, a drive shaft C (45), a push rod (34), and a tamping motor assembly (21). The tamping motor assembly (21) drives the drive shaft C (45) to rotate circumferentially. The drive shaft C (45) is axially slidably connected to the machine body. The bottom of the drive shaft C (45) extends into the coffee bowl (7) and is fixedly connected to the tamping assembly. The top of the drive shaft C (45) is connected to the push rod (34) and elastically connected to the machine body through a spring C (44). A triggering mechanism is provided at the top of the push rod (34). The tamping assembly is provided with a tamping ring (4), and the tamping ring (4) is provided with blades. The blades rotate to scrape and compact the coffee powder.

2. The automatic powder pressing device according to claim 1, characterized in that, The tamping assembly also includes a scraper ring (3), which is mounted on the tamping ring (4). The rotation of the tamping motor assembly (21) drives the gearbox assembly to rotate, which in turn drives the drive shaft C (45) to rotate circumferentially. The bottom of the drive shaft C (45) is fixedly connected to the tamping ring (4). The rotation of the tamping motor assembly (21) drives the tamping ring (4) to rotate. The coffee powder falling into the coffee bowl (7) is scraped and compacted by the rotation of the tamping ring (4). At the same time, the compacted powder will lift the tamping ring (4) upward, which will drive the drive shaft C (45) to move upward and push the push rod (34) to move axially.

3. The automatic powder pressing device according to claim 2, characterized in that, The gearbox assembly includes a small double gear (29), a large double gear (30), and a large gear (31). The small double gear (29) and the large double gear (30) mesh, and the large double gear (30) and the large gear (31) mesh. The powder pressing motor assembly (21) rotates, which drives the large double gear (30) to rotate through the small double gear (29) of the gearbox assembly. The large double gear (30) drives the large gear (31) to rotate. The transmission shaft A (38) is set inside the large gear (31) and is coaxially fixedly connected to the large gear (31), driving the transmission shaft A (38) to rotate. The transmission shaft B (39) is mounted on the transmission shaft A (38), and the transmission shaft C (45) is mounted on the transmission shaft B (39), driving the transmission shaft C (45) to rotate.

4. The automatic powder pressing device according to claim 1, characterized in that, The triggering mechanism includes a hinge plate (23) and a micro switch (18). The hinge plate (23) is hinged to the housing. The push rod (34) pushes the hinge plate (23) to rotate, triggering the micro switch (18).

5. The automatic powder pressing device according to claim 4, characterized in that, The micro switch (18) is set in the groove of the micro switch movable bracket (26). The micro switch movable bracket (26) is mounted on the two cylinders of the gearbox cover (22). The two springs B (27) are also mounted on the two cylinders of the gearbox cover (22). The washer screw (28) is locked on the two cylinders of the gearbox cover (22).

6. The automatic powder pressing device according to claim 5, characterized in that, The micro switch (18) is mounted on two cylinders, the micro switch movable bracket (26) and the gearbox cover (22), by spring B (27). The push rod (34) moves upward and pushes the hinge plate (23) upward. The hinge plate (23) rotates to trigger the micro switch (18).

7. The automatic powder pressing device according to claim 2, characterized in that, The powder scraping ring (3) includes a first rotating shaft (301), a powder scraping bracket (302), and two columns (304), and the powder scraping ring (3) is integrally formed; the powder pressing ring (4) includes an integrally formed second rotating shaft (401), a flat blade (402), and a raised blade (403), the first rotating shaft (301) and the second rotating shaft (401) are snapped together, the flat blade (402) and the raised blade (403) are respectively provided with circular limiting grooves (404), and are respectively fixedly connected to the two columns (304) of the powder scraping ring (3); the inner wall of the second rotating shaft (401) is threadedly connected to the drive shaft C (45) or polygonally sleeved.

8. The automatic powder pressing device according to claim 1, characterized in that, A cup spring (8) is provided in the inner mounting groove (91) of the funnel assembly (9).

9. The automatic powder pressing device according to claim 7, characterized in that, When the inner wall of the second rotating shaft (401) is polygonally sleeved with the transmission shaft C (45), a retaining ring (48) is provided in the pressing ring groove (405) of the pressing ring (4) and the connecting post groove (110) of the transmission shaft C (45).

10. A coffee machine, characterized in that, The coffee machine includes the automatic tamping device as described in any one of claims 1-9.

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