A straight drop coffee grinder

Abstract

The utility model relates to a kind of straight drop type coffee bean grinder, including shell, the inner center of the shell is equipped with grinding chamber, the grinding chamber is through two ends along shell height direction, the upper end of the grinding chamber is bean inlet, the lower end of the grinding chamber is powder outlet, grinding assembly is equipped in the grinding chamber, and the grinding assembly includes outer mill tray and inner mill tray, the inner mill tray is fixedly connected with shell, the outer mill tray is rotationally arranged in grinding chamber by carousel, driving assembly for driving carousel rotation is equipped in the shell, the driving assembly includes stator and rotor, the stator, rotor are sequentially sleeved in the outer periphery of grinding chamber from inside to outside, the stator is fixedly connected with shell, the rotor is interference fit with carousel, the utility model is equipped with grinding chamber in the center of shell, drives carousel to drive outer mill tray rotation relative to inner mill tray by driving assembly, realizes grinding, so that coffee bean is ground into coffee powder after entering from bean inlet can directly vertically drop from powder outlet, and powder outlet is fast and convenient.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinder technology, and in particular to a direct-fall coffee grinder. Background Technology

[0002] Coffee has gradually become a common beverage in people's lives and is widely loved. Coffee is generally available in instant and freshly ground forms. Freshly ground coffee has a richer aroma than instant coffee, so more and more consumers prefer to use coffee grinders to grind their own coffee. Coffee grinders can grind coffee beans into coffee powder. However, due to the assembly limitations of components such as motors, coffee grinders are not only large in size, but also have their powder outlets generally located on the side of the grinding chamber rather than in a direct-falling structure, which is not conducive to powder dispensing. Utility Model Content

[0003] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide a direct-fall coffee grinder that is not only small in size but also convenient for direct-fall coffee powder dispensing.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a direct-fall coffee grinder includes a housing, a grinding chamber is provided in the center of the housing, the grinding chamber extends through both ends along the height direction of the housing, the upper end of the grinding chamber is the bean inlet, the lower end of the grinding chamber is the powder outlet, a grinding assembly is provided in the grinding chamber, the grinding assembly includes an outer grinding disc and an inner grinding disc, the inner grinding disc is fixedly connected to the housing, the outer grinding disc is rotatably disposed in the grinding chamber by a turntable, a driving assembly for driving the turntable to rotate is provided in the housing, the driving assembly includes a stator and a rotor, the stator and rotor are sequentially sleeved on the outer periphery of the grinding chamber from the inside to the outside, the stator is fixedly connected to the housing, and the rotor is interference-fitted with the turntable.

[0005] Furthermore, the housing includes a detachably connected lower housing and an upper cover, and the grinding chamber includes an upper grinding chamber and a lower grinding chamber. The upper grinding chamber is located on the upper cover, and the lower grinding chamber is located on the lower housing. The distance between the lower end of the upper grinding chamber and the upper end of the lower grinding chamber is greater than zero. The lower housing has an installation cavity formed on the outer periphery of the lower grinding chamber for accommodating the stator and rotor.

[0006] Furthermore, the turntable has a first cavity, a second cavity, and a third cavity surrounding the first and second cavities at its center. The first and second cavities are located within the grinding chamber and connect the upper and lower grinding chambers. The bottom surface of the third cavity passes between the lower end of the upper grinding chamber and the upper end of the lower grinding chamber. The third cavity opens downward and connects to the mounting cavity to form a space for accommodating the stator and rotor. The inner peripheral wall of the stator is interference-fitted with the inner peripheral wall of the mounting cavity, and the outer peripheral wall of the rotor is interference-fitted with the inner peripheral wall of the third cavity.

[0007] Furthermore, the outer wall of the first cavity is rotatably engaged with the inner wall of the upper grinding chamber via a first bearing, and the outer wall of the second cavity is rotatably engaged with the inner wall of the lower grinding chamber via a second bearing.

[0008] Furthermore, the outer grinding disc is installed in the first cavity and is interference-fitted with the first cavity. The inner diameter of the first cavity is larger than the inner diameter of the second cavity. The transition between the first cavity and the second cavity forms a stepped surface for blocking the bottom of the outer grinding disc.

[0009] Furthermore, the inner diameter of the outer grinding disc is smaller than the inner diameter of the second cavity.

[0010] Furthermore, a mounting shaft for mounting an inner grinding disc is integrally formed at the center of the upper cover, and one end of the mounting shaft for mounting the inner grinding disc extends into the first cavity.

[0011] Compared with the prior art, the advantages of this utility model are as follows: This utility model sets a grinding chamber at the center of the shell and sets a grinding component in the grinding chamber to grind coffee beans. The grinding is achieved by driving the turntable to drive the outer grinding disc to rotate relative to the inner grinding disc through the drive component. This allows the coffee beans to be ground into coffee powder after entering from the bean inlet and falling directly vertically from the powder outlet. The powder outlet path is short, and the powder outlet is quick and convenient. Moreover, the drive device is set on the outer periphery of the grinding chamber, making full use of the space design. It can achieve both the direct and fast discharge of coffee powder and ensure that the overall structure is compact, which meets market demand. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a cross-sectional view of the housing and turntable of this utility model;

[0015] Figure 4 This is an exploded view of the present invention;

[0016] Figure 5 This is a schematic diagram of the structure of the upper cover of this utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the turntable of this utility model;

[0018] As shown in the figure, 1 is the housing, 1a is the lower housing, 1b is the upper cover, 1.1 is the grinding chamber, 1.1a is the upper grinding chamber, 1.1b is the lower grinding chamber, 1.2 is the bean inlet, 1.3 is the powder outlet, 1.4 is the mounting cavity, 1.5 is the mounting shaft, 2 is the outer grinding disc, 3 is the inner grinding disc, 4 is the turntable, 4.1 is the first cavity, 4.2 is the second cavity, 4.3 is the third cavity, 4.4 is the stepped surface, 5 is the stator, 6 is the rotor, 7 is the first bearing, and 8 is the second bearing. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, 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, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] like Figure 1-6 As shown, this utility model provides a direct-fall coffee grinder, including a housing 1. A grinding chamber 1.1 is provided at the center of the housing 1. The grinding chamber 1.1 extends through both ends along the height direction of the housing 1. The upper end of the grinding chamber 1.1 is the bean inlet 1.2, and the lower end of the grinding chamber 1.1 is the powder outlet 1.3. A grinding assembly is provided inside the grinding chamber 1. The grinding assembly includes an outer grinding disc 2 and an inner grinding disc 3. The inner grinding disc 3 is fixedly connected to the housing 1, that is, the inner grinding disc 3 cannot rotate relative to the housing 1. The outer grinding disc 2 is rotatably disposed in the grinding chamber 1.1 via a turntable 4. A driving assembly for driving the turntable 4 to rotate is provided inside the housing 1. The driving assembly includes a stator 5 and a rotor 6. The stator 5 and the rotor 6 are sequentially sleeved on the outer periphery of the grinding chamber 1.1 from the inside to the outside. The stator 5 is fixedly connected to the housing 1, that is, the stator 5 cannot rotate relative to the housing 1. The rotor 6 is interference-fitted with the turntable 4.

[0025] This invention features a grinding chamber 1.1 located at the center of the housing 1, with a grinding assembly inside to grind coffee beans. A drive assembly drives a turntable 4 to rotate the outer grinding disc 2 relative to the inner grinding disc 3, achieving grinding. This allows coffee beans entering the grinding chamber 1.1 from the bean inlet 1.2 to be ground into coffee powder by the outer and inner grinding discs 2 and 3, which then falls vertically from the powder outlet 1.3. The entire process, from bean inlet to powder outlet, is completed vertically. Compared to existing coffee grinders, this method results in a shorter and faster powder outlet path, preventing powder buildup. Furthermore, the drive assembly is located on the outer periphery of the grinding chamber, maximizing space utilization. This design achieves both rapid, direct coffee powder output and a compact overall structure, meeting market demands.

[0026] Among them, see Figure 3 , 4The housing 1 includes a detachably connected lower housing 1a and an upper cover 1b. The detachable connection structure facilitates disassembly, assembly, and maintenance. The grinding chamber 1.1 includes an upper grinding chamber 1.1a and a lower grinding chamber 1.1b. The upper grinding chamber 1.1a is located on the upper cover 1b, and the lower grinding chamber 1.1b is located on the lower housing 1a. The lower housing 1a has a mounting cavity 1.4 formed on the outer periphery of the lower grinding chamber 1.1b for accommodating the stator 5 and the rotor 6. The upper grinding chamber 1.1a and the lower grinding chamber 1.1b are located on the same axis, with the distance between the lower end of the upper grinding chamber 1.1a and the upper end of the lower grinding chamber 1.1b being greater than zero. This creates a break between the upper grinding chamber 1.1a and the lower grinding chamber 1.1b, allowing the turntable 4 to pass through the break. This enables the turntable 4 to transmit power from outside the grinding chamber 1.1 to the outer grinding disc 2 inside the grinding chamber 1.1, making full use of space and resulting in a compact overall structure.

[0027] Among them, see Figure 3 , 6 The turntable 4 has a first cavity 4.1 and a second cavity 4.2 that extend vertically through the center, and a third cavity 4.3 surrounding the first cavity 4.1 and the second cavity 4.2. The first cavity 4.1 and the second cavity 4.2 are located inside the grinding chamber 1.1 and connect the upper grinding chamber 1.1a and the lower grinding chamber 1.1b. The bottom surface of the third cavity 4.3 passes between the lower end of the upper grinding chamber 1.1a and the upper end of the lower grinding chamber 1.1b. The third cavity 4.3 opens downward and connects to the mounting cavity 1.4 to form a space for accommodating the stator 5 and the rotor 6. The inner peripheral wall of the stator 5 is press-fitted with the inner peripheral wall of the mounting cavity 1.4, and the outer peripheral wall of the rotor 6 is press-fitted with the inner peripheral wall of the third cavity 4.3. The first cavity 4.1 and the second cavity 4.2 are vertically connected, allowing coffee powder to fall directly into the ground. They also shield the disconnect between the upper grinding chamber 1.1a and the lower grinding chamber 1.1b, preventing coffee powder from falling through the disconnect. The third cavity 4.3, in conjunction with the mounting cavity 1.4, surrounds the stator 5 and the rotor 6, providing protection. The structure of the turntable 4, in conjunction with the upper cover 1b and the lower shell 1a, transmits the power of the rotor 6 outside the grinding chamber 1.1 to the grinding discs 2 inside and outside the grinding chamber 1.1. The rotor 6 on the outer ring of the grinding chamber 1.1 drives the turntable 4, causing the grinding discs 2 inside and outside the grinding chamber 1.1 to rotate relative to the inner grinding disc 3. This grinds the coffee beans falling from above into coffee powder, which then exits directly from below. The process of beans entering and powder exiting is quick and easy.

[0028] Among them, see Figure 2The outer wall of the first cavity 4.1 is rotatably engaged with the inner wall of the upper grinding chamber 1.1a through the first bearing 7, and the outer wall of the second cavity 4.2 is rotatably engaged with the inner wall of the lower grinding chamber 1.1b through the second bearing 8. Since the turntable 4 needs to rotate during use, the first bearing 7 and the second bearing 8 can help the turntable 4 rotate smoothly and steadily, reduce wear, and extend its service life.

[0029] Among them, see Figure 3 The outer grinding disc 2 is installed in the first cavity 4.1 and is interference-fitted with the first cavity 4.1. The inner diameter of the first cavity 4.1 is larger than the inner diameter of the second cavity 4.2. The transition between the first cavity 4.1 and the second cavity 4.2 forms a stepped surface 4.4 for blocking the bottom of the outer grinding disc 2, thereby achieving axial positioning of the outer grinding disc.

[0030] Among them, see Figure 3 The inner diameter of the outer grinding disc 2 is smaller than the inner diameter of the second cavity 4.2, so that the ground coffee powder can fall completely vertically and will not accumulate on the step surface.

[0031] The upper cover 1b has an integrally formed mounting shaft 1.5 for mounting the inner grinding disc 3 at its center. One end of the mounting shaft 1.5 for mounting the inner grinding disc 3 extends into the first cavity 4.1. The inner grinding disc 3 is fixedly connected to the mounting shaft 1.5, meaning that the inner grinding disc 3 cannot rotate relative to the mounting shaft 1.5. The non-rotating inner grinding disc 3, in conjunction with the rotating outer grinding disc 2, grinds the coffee beans.

[0032] In use, coffee beans fall from the bean inlet 1.2 of the upper grinding chamber 1.1a into the space between the outer grinding disc 2 and the inner grinding disc 3. The rotor 6 rotates, which in turn drives the turntable 4 to rotate. The turntable 4 drives the outer grinding disc 2 to rotate, so that the coffee beans are ground into coffee powder by the relative rotation of the outer grinding disc 2 and the inner grinding disc 3. The coffee powder falls from the powder outlet 1.3 of the lower grinding chamber 1.1b, achieving a direct and fast coffee powder output.

[0033] It should be noted that the working principles of stator 5 and rotor 6 are existing technologies, so they will not be described in detail.

[0034] Unless otherwise specified, the materials, reagents, and experimental equipment involved in this embodiment of the utility model are all commercially available products in the field of coffee grinders.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A direct-fall coffee grinder, characterized in that, The device includes a housing with a grinding chamber at its center. The grinding chamber extends through both ends along the height of the housing, with a bean inlet at the upper end and a powder outlet at the lower end. A grinding assembly is installed inside the grinding chamber, comprising an outer grinding disc and an inner grinding disc. The inner grinding disc is fixedly connected to the housing, and the outer grinding disc is rotatably mounted inside the grinding chamber via a turntable. A drive assembly for driving the turntable to rotate is installed inside the housing, comprising a stator and a rotor. The stator and rotor are sequentially fitted around the outer periphery of the grinding chamber from the inside out. The stator is fixedly connected to the housing, and the rotor is interference-fitted with the turntable.

2. The direct-fall coffee grinder according to claim 1, characterized in that, The housing includes a detachably connected lower housing and an upper cover. The grinding chamber includes an upper grinding chamber and a lower grinding chamber. The upper grinding chamber is located on the upper cover, and the lower grinding chamber is located on the lower housing. The distance between the lower end of the upper grinding chamber and the upper end of the lower grinding chamber is greater than zero. The lower housing has an installation cavity formed on the outer periphery of the lower grinding chamber for accommodating the stator and rotor.

3. A direct-fall coffee grinder according to claim 2, characterized in that, The turntable has a first cavity, a second cavity, and a third cavity surrounding the first and second cavities at its center. The first and second cavities are located in the grinding chamber and connect the upper and lower grinding chambers. The bottom surface of the third cavity passes between the lower end of the upper grinding chamber and the upper end of the lower grinding chamber. The third cavity opens downward and connects to the mounting cavity to form a space for accommodating the stator and rotor. The inner peripheral wall of the stator is interference-fitted with the inner peripheral wall of the mounting cavity, and the outer peripheral wall of the rotor is interference-fitted with the inner peripheral wall of the third cavity.

4. A direct-fall coffee grinder according to claim 3, characterized in that, The outer wall of the first cavity is rotatably engaged with the inner wall of the upper grinding chamber via a first bearing, and the outer wall of the second cavity is rotatably engaged with the inner wall of the lower grinding chamber via a second bearing.

5. A direct-fall coffee grinder according to claim 3, characterized in that, The outer grinding disc is installed in the first cavity and is interference-fitted with the first cavity. The inner diameter of the first cavity is larger than the inner diameter of the second cavity. The transition between the first cavity and the second cavity forms a stepped surface for blocking the bottom of the outer grinding disc.

6. A direct-fall coffee grinder according to claim 5, characterized in that, The inner diameter of the outer grinding disc is smaller than the inner diameter of the second cavity.

7. A direct-fall coffee grinder according to claim 5, characterized in that, The upper cover has an integrally formed mounting shaft at its center for mounting an inner grinding disc, with one end of the mounting shaft for mounting the inner grinding disc extending into the first cavity.

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