Grinding device and coffee flour mill

Abstract

The utility model provides a grinding device and a coffee flour mill, and aims to solve the problem that a grinding device of a machine for grinding coffee beans in the prior art is poor in grinding effect and needs to be further improved. A grinding device comprises an outer grinding knife provided with a containing hole penetrating in the vertical direction; the inner grinding knife is arranged in the containing hole, and the inner grinding knife and the outer grinding knife are coaxially arranged; a grinding gap is formed between the outer side wall of the inner grinding knife and the inner side wall of the outer grinding knife; a first-stage grinding area is arranged between the upper portion of the inner grinding knife and the upper portion of the outer grinding knife, a second-stage grinding area is arranged between the lower portion of the inner grinding knife and the lower portion of the outer grinding knife, and the grinding gap of the first-stage grinding area is larger than that of the second-stage grinding area. Coffee beans are roughly ground and smashed after falling into the first-stage grinding area, large-particle coffee powder obtained after rough grinding falls into the second-stage grinding area to be finely ground, the coffee beans can be ground into coffee powder step by step, and grinding is more uniform.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and particularly relates to a grinding device and a coffee grinder. Background Art

[0002] Coffee, cocoa and tea are the main beverages popular in the world. After being roasted, coffee beans need to be ground into coffee powder for convenient brewing and extraction. At present, many machines that can grind coffee beans have emerged on the market. The existing grinding devices on these machines adopt a paddle-like structure, and their grinding effect is not ideal. Therefore, the existing grinding devices need to be further improved. Summary of the Utility Model

[0003] The utility model provides a grinding device and a coffee grinder, aiming to solve the problem that the grinding device of the existing coffee bean grinding machine has a poor grinding effect and needs to be further improved.

[0004] To solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] In the first aspect, the utility model provides a grinding device, including:

[0006] An outer grinding knife, provided with a receiving hole penetrating in the up and down direction; and,

[0007] An inner grinding knife, arranged in the receiving hole and coaxially arranged with the outer grinding knife; a grinding gap is provided between the outer side wall of the inner grinding knife and the inner side wall of the outer grinding knife;

[0008] A primary grinding area is provided between the upper part of the inner grinding knife and the upper part of the outer grinding knife, and a secondary grinding area is provided between the lower part of the inner grinding knife and the lower part of the outer grinding knife. The grinding gap in the primary grinding area is larger than the grinding gap in the secondary grinding area.

[0009] Further scheme: Several first main grinding knives are provided on the upper part of the inner side wall surrounding the receiving hole, and several second main grinding knives are provided on the upper part of the outer side wall surrounding the inner grinding knife. The primary grinding area is located between the first main grinding knife and the second main grinding knife.

[0010] Further scheme: Each of the first main grinding knives is inclined clockwise from top to bottom, and each of the second main grinding knives is spirally arranged counterclockwise from top to bottom; the inner diameter of the receiving hole gradually decreases from top to bottom corresponding to the position of the primary grinding area; the diameter of the inner grinding knife gradually increases from top to bottom corresponding to the position of the primary grinding area.

[0011] Based on the above technical solution: The first main grinding knife is inclined clockwise from top to bottom, and the second main grinding knife is spirally arranged counterclockwise from top to bottom, so that the directions of the first main grinding knife and the second main grinding knife are opposite, resulting in a better crushing effect during grinding; by setting the inner diameter of the accommodation hole to gradually decrease from top to bottom corresponding to the position of the first-stage grinding area, and the diameter of the second main grinding knife to gradually increase from top to bottom corresponding to the position of the first-stage grinding area, it can play a guiding role for the coffee powder particles after coarse grinding and enable them to smoothly enter the second-stage grinding area.

[0012] Further solution: A plurality of first auxiliary grinding knives are provided at the lower part of the inner side wall surrounding the outer grinding knife, and a plurality of second auxiliary grinding knives are provided at the lower part of the outer side wall surrounding the inner grinding knife, and the second-stage grinding area is located between the first auxiliary grinding knife and the second auxiliary grinding knife.

[0013] Further solution: Each of the first auxiliary grinding knives is spirally arranged clockwise from top to bottom, and each of the second auxiliary grinding knives is spirally arranged counterclockwise from top to bottom;

[0014] The inner diameter of the accommodation hole gradually increases from top to bottom corresponding to the position of the second-stage grinding area; the diameter of the inner grinding knife gradually increases from top to bottom corresponding to the position of the second-stage grinding area.

[0015] Based on the above technical solution: By setting that each of the first auxiliary grinding knives is spirally arranged clockwise from top to bottom and each of the second auxiliary grinding knives is spirally arranged counterclockwise from top to bottom, and the spiral directions of the two auxiliary grinding knives are opposite, it makes the crushing and grinding effect on coffee particles better during grinding and the ground coffee powder more uniform.

[0016] Further solution: The outer grinding knife includes an upper end position and a lower end position relative to the inner grinding knife;

[0017] When the outer grinding knife is in the upper end position, the grinding gap in the second-stage grinding area is the largest; when the outer grinding knife is in the lower end position, the grinding gap in the second-stage grinding area is the smallest; by driving the outer grinding knife to move up and down between the upper end position and the lower end position relative to the inner grinding knife, the grinding gap in the second-stage grinding area can be adjusted.

[0018] Based on the above technical solution: The above setting enables the grinding gap in the second-stage grinding area to be adjusted by driving the outer grinding knife to move up or down, and the fineness of the ground coffee powder can be adjusted by adjusting the size of the grinding gap.

[0019] Further solution: A through hole is provided in the middle of the inner grinding knife along its axis direction, and a positioning groove concave upward is provided at the bottom of the inner grinding knife.

[0020] Based on the above technical solution: The through hole and the positioning groove are used to be connected to the driving device on the frame through bolts or pins.

[0021] In a second aspect, the present utility model provides a coffee grinder, which includes a grinding device described in any one of the solutions in the first aspect.

[0022] The beneficial effects of the present utility model are as follows:

[0023] By providing a primary grinding area between the upper part of the inner grinding knife and the upper part of the outer grinding knife, and a secondary grinding area between the lower part of the inner grinding knife and the lower part of the outer grinding knife, and the grinding gap of the primary grinding area is greater than that of the secondary grinding area, the present utility model enables the coffee beans to be coarsely ground and crushed first after falling into the primary grinding area, and the larger particles of coffee powder after coarse grinding fall into the secondary grinding area for fine grinding. The present utility model can grind coffee beans into coffee powder step by step, with a more reasonable structural design and more uniform grinding. Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of a grinding device of the present utility model.

[0026] Figure 2 It is a schematic cross-sectional structural diagram of a grinding device of the present utility model.

[0027] Figure 3 It is a schematic structural diagram of the outer grinding knife.

[0028] Figure 4 It is a schematic structural diagram of the inner grinding knife.

[0029] Explanation of the reference numerals in the drawings:

[0030] 1 - outer grinding knife; 11 - first main grinding knife; 12 - first auxiliary grinding knife; 2 - inner grinding knife; 21 - second main grinding knife; 22 - second auxiliary grinding knife; 23 - through hole; 24 - positioning groove; 3 - primary grinding area; 4 - secondary grinding area. Detailed Embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0032] Example 1:

[0033] As Figures 1 to 4 shown, this embodiment provides a grinding device, including:

[0034] An outer grinding knife 1, provided with a receiving hole penetrating in the up and down directions; and,

[0035] An inner grinding knife 2, disposed in the receiving hole and coaxially arranged with the outer grinding knife 1; there is a grinding gap between the outer side wall of the inner grinding knife 2 and the inner side wall of the outer grinding knife 1;

[0036] There is a primary grinding area 3 between the upper part of the inner grinding knife 2 and the upper part of the outer grinding knife 1, and a secondary grinding area 4 between the lower part of the inner grinding knife 2 and the lower part of the outer grinding knife 1. The grinding gap of the primary grinding area 3 is larger than the grinding gap of the secondary grinding area 4.

[0037] It should be noted that coffee beans fall into the primary grinding area 3 from the upper side of the primary grinding area 3, are first crushed into larger particles in the primary grinding area 3, and the crushed particles then fall into the lower secondary grinding area 4 to be further ground into smaller particle coffee powder.

[0038] As Figures 1 to 4 shown, in a specific embodiment, several first main grinding knives 11 are provided on the upper part of the inner side wall surrounding the receiving hole, and several second main grinding knives 21 are provided on the upper part of the outer side wall surrounding the inner grinding knife 2. The primary grinding area 3 is located between the first main grinding knives 11 and the second main grinding knives 21.

[0039] The specific structure is that each of the first main grinding knives 11 is inclined downward in the clockwise direction, the inclination angle of the first main grinding knife 11 is set to be fixed, and the upper ends of all the first main grinding knives 11 are flush, and the lower ends of all the first main grinding knives 11 are flush. Each of the second main grinding knives 21 is spirally arranged downward in the counterclockwise direction.

[0040] In a specific embodiment, the inner grinding knife 2 is connected to a driving component, and the driving component drives the inner grinding knife 2 to rotate relative to the outer grinding knife 1. The outer grinding knife 1 does not rotate. The directions of the first main grinding knife 11 and the second main grinding knife 21 are opposite when extending downward. When the inner grinding knife 2 rotates, it can prevent coffee particles from directly falling from the grinding gap, slow down the falling speed of the coffee particles in the grinding gap, and thus achieve a better crushing effect during grinding.

[0041] As Figures 1 to 4As shown, in a specific embodiment, the inner diameter of the receiving hole gradually decreases from top to bottom corresponding to the position of the first-stage grinding area 3; the diameter of the inner grinding knife 2 gradually increases from top to bottom corresponding to the position of the first-stage grinding area 3, so that the grinding gap of the first-stage grinding area 3 gradually decreases from top to bottom, making the ground coffee particles gradually smaller, and the grinding gap gradually decreases from top to bottom, which also plays a certain guiding role for the coffee particles, making them enter the second-stage grinding area 4 more smoothly.

[0042] In a specific embodiment, several first auxiliary grinding knives 12 are provided at the lower part of the inner side wall surrounding the outer grinding knife 1, and several second auxiliary grinding knives 22 are provided at the lower part of the outer side wall surrounding the inner grinding knife 2, and the second-stage grinding area 4 is located between the first auxiliary grinding knives 12 and the second auxiliary grinding knives 22.

[0043] As Figures 1 to 4 shown, in a specific embodiment, each of the first auxiliary grinding knives 12 is spirally arranged clockwise from top to bottom, and each of the second auxiliary grinding knives 22 is spirally arranged counterclockwise from top to bottom;

[0044] The inner diameter of the receiving hole gradually increases from top to bottom corresponding to the position of the second-stage grinding area 4; the diameter of the inner grinding knife 2 gradually increases from top to bottom corresponding to the position of the second-stage grinding area 4. Specifically, the spiral directions of the first auxiliary grinding knives 12 and the second auxiliary grinding knives 22 are opposite, which can prevent the coffee powder from falling rapidly from the grinding gap of the second-stage grinding area 4, making the grinding effect of crushing and grinding the coffee particles better during grinding and the ground powder more uniform.

[0045] In a specific embodiment, the upper ends of several first auxiliary grinding knives 12 are flush, and the lower ends of several first auxiliary grinding knives 12 are flush. Similarly, the second auxiliary grinding knives 22 are arranged in the same way. The number of the first auxiliary grinding knives 12 is greater than the number of the first main grinding knives 11, and the number of the second auxiliary grinding knives 22 is greater than the number of the second main grinding knives 21, so that after the coffee beans are ground into coarser particles in the first-stage grinding area 3, they can be ground into finer particles when entering the second grinding area.

[0046] In a specific embodiment, the position of the outer grinding knife 1 on the frame can be adjusted up and down, and the outer grinding knife 1 includes an upper end position and a lower end position relative to the inner grinding knife 2;

[0047] Specifically, during the adjustment process, when the outer grinding knife 1 is in the upper end position, the grinding gap of the second-stage grinding area 4 is the largest; when the outer grinding knife 1 is in the lower end position, the grinding gap of the second-stage grinding area 4 is the smallest; by driving the outer grinding knife 1 to move up and down between the upper end position and the lower end position relative to the inner grinding knife 2, the grinding gap of the second-stage grinding area 4 can be adjusted, and the fineness of the ground coffee powder can be adjusted by adjusting the size of the grinding gap.

[0048] AsFigure 2 As shown, in a specific embodiment, in order to make the driving component drive the inner grinding knife 2 to rotate more smoothly and stably, a through hole 23 is provided in the middle of the inner grinding knife 2 along its axis direction, and a positioning groove 24 concave upward is provided at the bottom of the inner grinding knife 2. The through hole 23 can be fixed to the driving component through bolts and nuts. The positioning grooves 24 are preferably two and are respectively located on opposite sides of the through hole 23. The two positioning grooves 24 are respectively rotated synchronously with the driving component through two positioning pins, so as to make the driving component drive the inner grinding knife 2 to rotate more smoothly and stably.

[0049] Embodiment Two:

[0050] This embodiment provides a coffee grinder, which includes a grinding device according to any one of the solutions in Embodiment One.

[0051] Principle of operation description:

[0052] After the coffee beans fall into the primary grinding area 3, they are first coarsely ground and broken by the first main grinding knife 11 and the second main grinding knife 21 to become relatively large particles. Then, the relatively large particles fall into the secondary grinding area 4, and are further ground and broken into smaller particles by the second secondary grinding knife 22 and the first secondary grinding knife 12.

[0053] The present utility model is not limited to the above optional embodiments. On the premise of not conflicting with each other, the various solutions can be combined arbitrarily; anyone can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present utility model, they all fall within the protection scope of the present utility model.

Claims

1. A grinding device, characterized in that: include: The external grinder is provided with a receiving hole extending vertically; and An inner grinder is arranged in the receiving hole and coaxially arranged with the outer grinder; a grinding gap is arranged between the outer side wall of the inner grinder and the inner side wall of the outer grinder; A primary grinding area is provided between the upper part of the inner grinder and the upper part of the outer grinder, a secondary grinding area is provided between the lower part of the inner grinder and the lower part of the outer grinder, and the grinding gap of the primary grinding area is larger than the grinding gap of the secondary grinding area.

2. A grinding device according to claim 1, characterized in that: A plurality of first main grinders are arranged on the upper portion of the inner side wall surrounding the accommodating hole, a plurality of second main grinders are arranged on the upper portion of the outer side wall surrounding the inner grinder, and the primary grinding area is located between the first main grinders and the second main grinders.

3. A grinding device according to claim 2, characterized in that: Each of the first main grinders is tilted clockwise from top to bottom, and each of the second main grinders is spirally arranged counterclockwise from top to bottom; the inner diameter of the accommodating hole corresponding to the position of the primary grinding area gradually decreases from top to bottom; the diameter of the inner grinder corresponding to the position of the primary grinding area gradually increases from top to bottom.

4. A grinding device according to claim 1, characterized in that: A plurality of first auxiliary grinders are arranged around the lower portion of the inner side wall of the outer grinder, a plurality of second auxiliary grinders are arranged around the lower portion of the outer side wall of the inner grinder, and the secondary grinding area is located between the first auxiliary grinders and the second auxiliary grinders.

5. A grinding device according to claim 4, characterized in that: Each of the first pair of sharpeners is arranged in a clockwise spiral from top to bottom, and each of the second pair of sharpeners is arranged in a counterclockwise spiral from top to bottom; The inner diameter of the receiving hole increases gradually from top to bottom corresponding to the position of the secondary grinding zone; the diameter of the inner grinder increases gradually from top to bottom corresponding to the position of the secondary grinding zone.

6. A grinding device according to claim 1, characterized in that: The outer grinder includes an upper end position and a lower end position relative to the inner grinder; When the outer grinder is at the upper end position, the grinding gap of the secondary grinding zone is the largest; when the outer grinder is at the lower end position, the grinding gap of the secondary grinding zone is the smallest; the grinding gap of the secondary grinding zone can be adjusted by driving the outer grinder to move up and down between the upper end position and the lower end position relative to the inner grinder.

7. A grinding device according to claim 1, characterized in that: A through hole is arranged at the middle of the inner grinder along the axial direction thereof, and a positioning groove concave upward is arranged at the bottom of the inner grinder.

8. A coffee grinder, characterized in that: It comprises a grinding device as described in any one of claims 1 to 7.

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