Coffee bean fine grinding device for coffee processing

Abstract

The utility model discloses a coffee bean fine grinding device for coffee processing. The coffee bean fine grinding device comprises a hollow barrel with the upper end and the lower end open, a rotating motor is detachably installed at the upper end of the barrel, a storage cavity is formed in the upper end in the barrel, a first-stage grinding mechanism is installed at the lower end in the barrel, and a rotating shaft is vertically arranged in the barrel; the upper end of the rotating shaft is detachably connected to an output shaft of the rotating motor, the lower end of the rotating shaft is connected to the first-stage grinding mechanism, the lower end of the cylinder is detachably connected with a screening assembly, the screening assembly is in a funnel shape, the lower end of the screening assembly communicates with a second-stage grinding mechanism, and the second-stage grinding mechanism is detachably connected to the lower end of the cylinder. The lower end of the second-stage grinding mechanism detachably communicates with a material receiving barrel, and the lower inclined face of the screening assembly communicates with the open end of the material receiving barrel. According to the coffee machine, primary grinding is conducted through the first-stage grinding mechanism, then coarse coffee powder is screened out through the screening assembly, secondary grinding is conducted again, and finally all the coffee powder is discharged into the material receiving barrel, so that the uniformity of particles is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of coffee processing technology, and in particular to a fine grinding device for coffee beans used in coffee processing. Background Technology

[0002] In the coffee processing industry, the uniformity of coffee bean grind is one of the core parameters determining the quality of the final beverage. Significant differences in the size of the ground coffee particles can lead to inconsistent water permeability during extraction, resulting in either over-extraction (fine grounds causing bitterness) or under-extraction (coarse grounds causing a weak flavor). Traditional coffee bean grinders mostly use a single-stage grinding structure, relying primarily on high-speed rotating blades or grinding discs to crush the coffee beans in a single pass, making it difficult to guarantee particle uniformity during a single grind. Utility Model Content

[0003] The purpose of this invention is to provide a fine grinding device for coffee beans used in coffee processing, which ensures the uniformity of the particles through two grinding processes.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A fine grinding device for coffee beans is disclosed, comprising a hollow cylinder with openings at both the top and bottom. A rotating motor is detachably mounted on the upper end of the cylinder. A material storage chamber is located at the upper end of the cylinder. A primary grinding mechanism is mounted on the lower end of the cylinder. A rotating shaft is vertically mounted inside the cylinder. The upper end of the rotating shaft is detachably connected to the output shaft of the rotating motor, and the lower end of the rotating shaft is connected to the primary grinding mechanism. A sieve assembly, which is funnel-shaped, is detachably connected to the lower end of the sieve assembly. A secondary grinding mechanism is detachably connected to the lower end of the cylinder. A receiving cylinder is detachably connected to the lower end of the secondary grinding mechanism. The lower inclined surface of the sieve assembly is connected to the open end of the receiving cylinder.

[0006] By adopting the above technical solution, the rotating motor drives the primary grinding mechanism and the secondary grinding mechanism to work. The coffee beans are put into the storage chamber, and are first pre-ground by the primary grinding mechanism. Then, the coarse coffee powder is sieved out by the sieving component and ground again. Finally, all of them are discharged into the receiving cylinder to ensure the uniformity of the particles.

[0007] A further feature of this invention is that a fixed sleeve is vertically provided inside the storage cavity, the fixed sleeve is sleeved on the rotating shaft, the fixed sleeve is rotatably connected to the rotating shaft, and a plurality of first connecting rods are evenly provided on the periphery of the fixed sleeve, the other end of the first connecting rods being connected to the inner wall of the storage cavity.

[0008] By adopting the above technical solution, it is convenient to install the rotating shaft.

[0009] A further feature of this invention is that the primary grinding mechanism includes a first conical cutter disc and a first outer ring cutter disc, the first outer ring cutter disc being detachably installed inside the cylinder, the first conical cutter disc being detachably installed inside the first outer ring cutter disc, and the first conical cutter disc being sleeved on the rotating shaft.

[0010] By adopting the above technical solution, the rotating shaft drives the first conical cutter disc to rotate within the first outer ring cutter disc, thus performing initial grinding of the coffee.

[0011] A further feature of this invention is that the sieving assembly includes a metal screen and a connecting pipe. The metal screen is funnel-shaped, wider at the top and narrower at the bottom. The metal screen is detachably connected to the lower end of the first outer ring cutter disc. The upper end of the connecting pipe is connected to the lower end of the metal screen. The metal screen and the connecting pipe are sleeved on the rotating shaft. The lower end of the connecting pipe is connected to the secondary grinding mechanism.

[0012] By adopting the above technical solution, it is convenient to sift the initially ground coffee powder and pass it into the secondary grinding mechanism.

[0013] A further feature of this invention is that a scraper is provided inside the metal screen, the scraper is connected to the rotating shaft, and the scraper is attached to the metal screen.

[0014] By adopting the above technical solution, the rotating shaft drives the scraper to rotate, and the scraper can scrape the coffee powder on the metal screen, making it easy to sift.

[0015] A further configuration of this utility model is as follows: the secondary grinding mechanism includes an outer shell, an inner shell, a second connecting rod, a second conical cutter disc, a second outer ring cutter disc, and an adjusting mechanism. The upper end of the outer shell is detachably connected to the lower end of the cylinder. The inner shell is located in the center of the interior of the outer shell. The lower end of the connecting pipe is connected to the inner shell. Multiple second connecting rods are provided and respectively located between the inner shell and the outer shell. The channel formed between the outer shell and the inner shell corresponds to the lower end of the metal screen. The second outer ring cutter disc is located inside the inner shell. The second conical cutter disc is located inside the second outer ring cutter disc. The rotating shaft vertically penetrates the second conical cutter disc. The adjusting mechanism is installed at the lower end of the rotating shaft and is used to adjust the gap between the second conical cutter disc and the second outer ring cutter disc. The receiving cylinder is detachably connected to the lower end of the outer shell.

[0016] By employing the above technical solution, the rotating shaft drives the second conical cutter disc to rotate, performing a secondary grinding of the coffee powder, breaking down the coarser coffee powder into appropriately sized particles. The channel between the outer and inner shells facilitates the discharge of coffee powder sieved during the initial grinding into the receiving hopper. The adjustment mechanism allows for easy adjustment of the second conical cutter disc and the second outer ring cutter disc, thereby regulating the coarseness of the secondary grind.

[0017] A further feature of this invention is that the upper end of the metal screen can be detachably installed on the periphery of the outer casing.

[0018] The above technical solution facilitates disassembly.

[0019] In summary, this utility model has the following beneficial effects:

[0020] Firstly, this utility model first performs preliminary grinding through a primary grinding mechanism, then sieves out excessively coarse coffee powder through a sieving component, performs secondary grinding again, and finally discharges all of it into the receiving cylinder to ensure the uniformity of the particles.

[0021] Secondly, this utility model uses a rotating motor and a rotating shaft to simultaneously drive the primary grinding mechanism and the secondary grinding mechanism to rotate, and also drives the scraper to rotate, thus processing coffee powder. The structure is simple and the processing is convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention.

[0024] In the diagram: 1. Cylinder; 2. Rotating motor; 3. Storage chamber; 31. Fixed sleeve; 32. First connecting rod; 4. Primary grinding mechanism; 41. First conical cutter disc; 42. Outer ring cutter disc; 5. Rotating shaft; 6. Screening assembly; 61. Metal screen; 62. Connecting pipe; 7. Secondary grinding mechanism; 71. Outer shell; 72. Inner shell; 73. Second connecting rod; 74. Second conical cutter disc; 75. Second outer ring cutter disc; 76. Adjusting mechanism; 77. Channel; 8. Receiving cylinder; 9. Scraper. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example: A fine grinding device for coffee beans used in coffee processing, such as... Figure 1 and Figure 2 As shown, a hollow cylinder 1 with openings at both the top and bottom is included. A rotary motor 2 is detachably mounted on the upper end of the cylinder 1. The rotary motor 2 requires a reducer to increase torque. A storage chamber 3 is located at the upper end of the cylinder 1, and a primary grinding mechanism 4 is installed at the lower end of the cylinder 1. A vertical rotating shaft 5 is located inside the cylinder 1. The upper end of the rotating shaft 5 is detachably connected to the output shaft of the rotary motor 2, while the lower end of the rotating shaft 5 is connected to the primary grinding mechanism 4. A screening assembly 6, which is funnel-shaped, is detachably connected to the lower end of the screening assembly 6. A secondary grinding mechanism 7 is connected to the lower end of the cylinder 1 and is detachably connected to a receiving cylinder 8. The lower inclined surface of the screening assembly 6 is connected to the open end of the receiving cylinder 8. The rotating motor 2 drives the primary grinding mechanism 4 and the secondary grinding mechanism 7 to rotate simultaneously via the rotating shaft 5. The coffee beans are first initially ground by the primary grinding mechanism 4, and the ground coffee powder falls onto the sieving component 6. The sieved coffee powder falls directly into the receiving cylinder 8, while the unsieved coffee powder falls into the secondary grinding mechanism 7 for secondary grinding, so that the coffee is ground evenly.

[0030] To facilitate the installation of the rotating shaft 5 inside the cylinder 1, a fixing sleeve 31 is vertically installed inside the storage chamber 3. The fixing sleeve 31 is fitted onto the rotating shaft 5 and is rotatably connected to the rotating shaft 5. Multiple first connecting rods 32 are evenly arranged around the periphery of the fixing sleeve 31, and the other end of the first connecting rod 32 is connected to the inner wall of the storage chamber 3. The first connecting rods 32 can also separate the coffee beans inside the fixing sleeve 31, making it easier for them to be ground sequentially by the primary grinding mechanism 4.

[0031] The primary grinding mechanism 4 includes a first conical cutter disc 41 and a first outer ring cutter disc 42. The first outer ring cutter disc 42 is detachably installed inside the cylinder 1, and the first conical cutter disc 41 is detachably installed inside the first outer ring cutter disc 42. The first conical cutter disc 41 is sleeved on the rotating shaft 5. The first conical cutter disc 41 and the first outer ring cutter disc 42 cooperate with each other to perform initial grinding. Since the primary grinding mechanism 4 mainly performs initial grinding, the gap between the first conical cutter disc 41 and the first outer ring cutter disc 42 does not need to be adjusted. The gap can be larger to improve grinding efficiency.

[0032] The sieving assembly 6 includes a metal screen 61 and a connecting pipe 62. The metal screen 61 is funnel-shaped, wider at the top and narrower at the bottom. The metal screen 61 is detachably connected to the lower end of the first outer ring cutter disc 42. The upper end of the connecting pipe 62 is connected to the lower end of the metal screen 61. The metal screen 61 and the connecting pipe 62 are fitted onto the rotating shaft 5. The lower end of the connecting pipe 62 is connected to the secondary grinding mechanism 7. The metal screen 61 sieves the initially ground coffee powder. The sieved coffee powder falls into the receiving cylinder 8, while the unsieved coffee powder falls into the secondary grinding mechanism 7 through the connecting pipe 62. To facilitate rapid sieving of the coffee powder, a scraper 9 is provided inside the metal screen 61. The scraper 9 is connected to the rotating shaft 5 and adheres to the metal screen 61. The rotating shaft 5 drives the scraper 9 to rotate, scraping the coffee powder on the metal screen 61.

[0033] The secondary grinding mechanism 7 includes an outer shell 71, an inner shell 72, a second connecting rod 73, a second conical cutter disc 74, a second outer ring cutter disc 75, and an adjustment mechanism 76. The upper end of the outer shell 71 is detachably connected to the lower end of the cylinder 1. The inner shell 72 is located in the center of the inner shell 71. The lower end of the connecting pipe 62 is connected to the inner shell 72. Multiple second connecting rods 73 are provided and are respectively located between the inner shell 72 and the outer shell 71. The channel 77 formed between the outer shell 71 and the inner shell 72 corresponds to the lower end of the metal screen 61, which facilitates the sieved coffee powder to fall into the receiving cylinder 8. The second outer ring cutter disc 75 is located inside the inner housing 72, and the second conical cutter disc 74 is located inside the second outer ring cutter disc 75. A rotating shaft 5 vertically passes through the second conical cutter disc 74. An adjusting mechanism 76 is installed at the lower end of the rotating shaft 5. The adjusting mechanism 76 is used to adjust the gap between the second conical cutter disc 74 and the second outer ring cutter disc 75. The receiving cylinder 8 is detachably connected to the lower end of the outer housing 71. The upper end of the metal screen 61 is detachably installed on the periphery of the outer housing 71. The secondary grinding mechanism 7 mainly grinds coarser coffee powder a second time by rotating the second conical cutter disc 74 within the second outer ring cutter disc 75. The coarseness of the coffee powder can be changed by adjusting the adjusting mechanism 76 and replacing the metal screen 61.

[0034] Instructions for use: First, remove the rotating motor 2. Then, put the coffee beans into the storage chamber 3. Turn on the rotating motor 2 to start operation. The coffee beans are first ground by the primary grinding mechanism 4. The ground coffee powder will fall from between the first conical cutter disc 41 and the first outer ring cutter disc 42 onto the metal screen 61. Then, it is scraped by the scraper 9. The finer coffee powder falls through the metal screen 61 into the receiving cylinder 8, while the coarser coffee powder will be fed into the secondary grinding mechanism 7 through the connecting pipe 62. After being ground a second time by the secondary grinding mechanism 7, it falls into the receiving cylinder 8, thus completing the entire grinding process.

[0035] Of course, this device is equipped with a control panel or control buttons for switching on and off. This device can be powered by an external power source or have a built-in battery, neither of which will affect the use of this device.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A fine grinding device for coffee beans for coffee processing, comprising a hollow cylinder (1) with openings at both the top and bottom, characterized in that: A rotating motor (2) is detachably installed at the upper end of the cylinder (1). A storage chamber (3) is provided at the upper end of the cylinder (1). A primary grinding mechanism (4) is installed at the lower end of the cylinder (1). A rotating shaft (5) is vertically provided inside the cylinder (1). The upper end of the rotating shaft (5) is detachably connected to the output shaft of the rotating motor (2). The lower end of the rotating shaft (5) is connected to the primary grinding mechanism (4). A sieve assembly (6) is detachably connected to the lower end of the cylinder (1). The sieve assembly (6) is funnel-shaped. A secondary grinding mechanism (7) is connected to the lower end of the sieve assembly (6). The secondary grinding mechanism (7) is detachably connected to the lower end of the cylinder (1). A receiving cylinder (8) is detachably connected to the lower end of the secondary grinding mechanism (7). The lower inclined surface of the sieve assembly (6) is connected to the opening end of the receiving cylinder (8).

2. The coffee bean fine grinding device for coffee processing according to claim 1, characterized in that: A fixed sleeve (31) is vertically provided inside the storage cavity (3). The fixed sleeve (31) is sleeved on the rotating shaft (5). The fixed sleeve (31) is rotatably connected to the rotating shaft (5). Multiple first connecting rods (32) are evenly provided on the periphery of the fixed sleeve (31). The other end of the first connecting rod (32) is connected to the inner wall of the storage cavity (3).

3. The coffee bean fine grinding device for coffee processing according to claim 2, characterized in that: The primary grinding mechanism (4) includes a first conical cutter disc (41) and a first outer ring cutter disc (42). The first outer ring cutter disc (42) is detachably installed inside the cylinder (1), and the first conical cutter disc (41) is detachably installed inside the first outer ring cutter disc (42). The first conical cutter disc (41) is sleeved on the rotating shaft (5).

4. The coffee bean fine grinding device for coffee processing according to claim 3, characterized in that: The sieving assembly (6) includes a metal screen (61) and a connecting pipe (62). The metal screen (61) is funnel-shaped with a larger top and a smaller bottom. The metal screen (61) is detachably connected to the lower end of the first outer ring cutter disc (42). The upper end of the connecting pipe (62) is connected to the lower end of the metal screen (61). The metal screen (61) and the connecting pipe (62) are sleeved on the rotating shaft (5). The lower end of the connecting pipe (62) is connected to the secondary grinding mechanism (7).

5. The coffee bean fine grinding device for coffee processing according to claim 4, characterized in that: The metal screen (61) is provided with a scraper (9), which is connected to the rotating shaft (5) and is attached to the metal screen (61).

6. The coffee bean fine grinding device for coffee processing according to claim 5, characterized in that: The secondary grinding mechanism (7) includes an outer shell (71), an inner shell (72), a second connecting rod (73), a second conical cutter disc (74), a second outer ring cutter disc (75), and an adjusting mechanism (76). The upper end of the outer shell (71) is detachably connected to the lower end of the cylinder (1). The inner shell (72) is located in the center of the interior of the outer shell (71). The lower end of the connecting pipe (62) is connected to the inner shell (72). Multiple second connecting rods (73) are provided and are respectively located between the inner shell (72) and the outer shell (71). The outer shell (71) and the inner shell... The channel (77) formed between (72) corresponds to the lower end of the metal screen (61). The second outer ring cutter disc (75) is located inside the inner shell (72). The second conical cutter disc (74) is located inside the second outer ring cutter disc (75). The rotating shaft (5) vertically passes through the second conical cutter disc (74). The adjusting mechanism (76) is installed at the lower end of the rotating shaft (5). The adjusting mechanism (76) is used to adjust the gap between the second conical cutter disc (74) and the second outer ring cutter disc (75). The receiving cylinder (8) is detachably connected to the lower end of the outer shell (71).

7. The coffee bean fine grinding device for coffee processing according to claim 6, characterized in that: The upper end of the metal screen (61) can be detachably installed on the periphery of the outer casing (71).

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