Coffee bean crushing structure and coffee bean grinding machine

Abstract

According to the coffee bean crushing structure and the coffee bean grinding machine, the coffee bean crushing structure comprises the upper cutter head, the lower cutter head and the cutter head pressing block, the central axis of the pre-grinding column and the central axis of the material guiding sleeve are eccentrically arranged, and when the upper cutter head and the lower cutter head rotate relatively, the cutter head pressing block can press the pre-grinding column and the material guiding sleeve. And the distance between the outer edge surface of the pre-grinding column and the inner edge surface of the material guide sleeve is periodically changed. The pre-grinding column is arranged in the middle of the lower cutter head and combined with the guide sleeve in the middle of the upper cutter head, the pre-grinding column and the guide sleeve are eccentrically arranged, coffee beans can be pre-crushed along with rotation of the holes in the process that the coffee beans pass through the holes, and then the coffee beans enter a gap formed by the upper cutter head and the lower cutter head to be ground; on one hand, the problem that grinding is uneven due to the fact that too many coffee beans are led in at a time can be effectively solved, and on the other hand, the consequences that a large number of whole coffee beans are gathered between the upper cutter head and the lower cutter head, loads are large at the grinding moment, and motor protection, machine jamming and component damage are caused can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinder technology, and more specifically, to a coffee bean crushing structure and a coffee bean grinder. Background Technology

[0002] For coffee lovers and coffee shops, a coffee grinder is an indispensable piece of equipment. In today's fast-paced society, both coffee enthusiasts and coffee shop owners tend to choose equipment that can grind coffee beans in a shorter time. Large burrs, with their larger grinding area and higher efficiency, have become the choice for most people in the market.

[0003] While larger cutter heads offer higher efficiency, they inevitably require more powerful motors. Therefore, one must either increase the motor specifications, size, and load capacity, which increases the overall size and manufacturing cost of the equipment; or, during operation, feed material intermittently and slowly, resulting in a poor user experience.

[0004] Currently, some manufacturers use feed screws or feed baffles to control the feeding speed in order to reduce the power of the equipment, but this also results in a loss of efficiency, which goes against the original purpose of pursuing a large cutter head.

[0005] A coffee grinder for preventing the adjusting disc from falling off, disclosed in Chinese patent application CN219557055U, is a common type of coffee grinder. In this structure, the central shaft 1 is connected to the motor, providing power for the grinder's operation. The lower blade 3 is fixed to the lower blade holder 2 via a lower blade pressure block 4. The central shaft 1, lower blade holder 2, lower blade 3, and lower blade pressure block 4 form a single unit, rotating around the motor's central axis under the motor's drive to grind coffee beans. The upper blade 6 is fixed to the upper blade holder 5, which can move up and down along the motor axis. By adjusting the position of the upper blade holder 5, the gap between the upper blade 6 and the lower blade 3 can be adjusted, thereby controlling the coarseness of the ground coffee powder.

[0006] In this conventional design, the cutter head is thicker on the outside and thinner on the inside, that is... Figure 1 As shown, the gap between the two blades near the edge is smaller, while the gap between the two blades far from the edge is larger. When the grinder is working, a large number of whole coffee beans can easily accumulate in area a at the same time. The high instantaneous load during grinding may cause motor protection, machine jamming, and damage to components. Moreover, larger coffee beans need to be ground in the center first until they reach a certain particle size before they can enter the edge of the blades for fine grinding. This results in not only low grinding efficiency but also uneven grind of coffee beans, affecting the taste.

[0007] Therefore, it is necessary to propose a coffee bean crushing structure and a coffee bean grinder to solve the above-mentioned technical problems. Utility Model Content

[0008] This utility model provides a coffee bean crushing structure and a coffee bean grinder to solve the problems of uneven grinding fineness affecting the taste and low grinding efficiency of existing coffee machines.

[0009] According to one aspect of the present invention, a coffee bean crushing structure is provided, comprising an upper cutter disc, a lower cutter disc, and a cutter disc clamping block. The cutter disc clamping block is pressed against the middle of the lower cutter disc. The upper cutter disc and the lower cutter disc are adapted to form a grinding gap for grinding coffee beans. A guide sleeve is installed in the middle of the upper cutter disc. The upper part of the cutter disc clamping block protrudes outward to form a pre-grinding column. The central axis of the pre-grinding column is eccentrically set with respect to the central axis of the guide sleeve. When the upper cutter disc and the lower cutter disc rotate relative to each other, the distance between the outer edge surface of the pre-grinding column and the inner edge surface of the guide sleeve changes periodically.

[0010] Based on the above scheme, a preferred embodiment is provided with a spiral guide belt on the outer circular surface of the pre-grinding column, the guide belt protruding from the surface of the pre-grinding column.

[0011] Based on the above scheme, preferably, the bottom of the pre-grinding column is conical and connected to the cutter head clamping block.

[0012] Based on the above scheme, preferably, the outer edge surface of the cutter disc clamping block is conical, and the top surface of the cutter disc clamping block and the end face of the upper cutter disc form a feeding gap.

[0013] Based on the above scheme, preferably, a limiting step is provided on the inner edge surface of the lower cutter disc, and a positioning step adapted to the limiting step is provided at the bottom of the cutter disc clamping block.

[0014] Based on the above scheme, a preferred embodiment is that one side of the inner edge of the guide sleeve protrudes outward to form a grinding body.

[0015] Based on the above scheme, a preferred embodiment is provided with a spiral guide belt on the outer circular surface of the pre-grinding column, and the grinding body and the guide belt are intermittently arranged opposite each other.

[0016] This utility model also provides a coffee bean grinder, including the above-mentioned coffee bean crushing structure, and the coffee bean grinder further includes an upper cutter head holder and a lower cutter head holder, the upper cutter head is installed in the upper cutter head holder, the lower cutter head is installed in the lower cutter head holder, and the lower cutter head holder is connected to the output shaft of a motor to drive the lower cutter head to rotate relative to the upper cutter head.

[0017] Based on the above scheme, preferably, the outer edge of the guide sleeve extends outward to form a flange, and the flange is equipped with bolts that are connected to the upper cutter head frame.

[0018] Based on the above scheme, preferably, the pre-grinding column and the cutter head clamping block are an integral structure, and the cutter head clamping block and the lower cutter head frame are locked together by bolts installed on the cutter head clamping block.

[0019] This invention relates to a coffee bean crushing structure. A pre-grinding column is positioned in the center of the lower cutter disc, combined with a guide sleeve in the center of the upper cutter disc. The pre-grinding column and guide sleeve are eccentrically positioned. After the coffee beans enter the guide sleeve, they pass through the gap between the pre-grinding column and the guide sleeve under their own gravity. The lower cutter disc rotates relative to the upper cutter disc. Therefore, as the coffee beans pass through the gap, they are pre-crushed by the rotation of the gap before entering the gap between the upper and lower cutter discs for grinding. This effectively alleviates the problem of uneven grinding caused by too many coffee beans being fed in at once. Furthermore, it effectively prevents a large number of whole coffee beans from accumulating between the upper and lower cutter discs, which could cause a large instantaneous grinding load, leading to motor protection failure, machine jamming, and component damage. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of an existing coffee bean grinder;

[0022] Figure 2 This is a cross-sectional view of the coffee bean crushing structure of this utility model.

[0023] Figure 3 This is a perspective view of the coffee bean crushing structure of this utility model.

[0024] Figure 4 This is a three-dimensional structural diagram of the cutter head clamping block and pre-grinding column of this utility model;

[0025] Explanation of icon numbers:

[0026] 10. Upper cutter head holder; 11. Upper cutter head; 20. Lower cutter head holder; 21. Lower cutter head; 22. Cutter head clamping block; 23. Grinding gap; 24. Guide sleeve; 241. Flange; 242. Bolt; 243. Grinding body; 245. Pre-crushing gap; 30. Pre-grinding column; 31. Guide belt; 32. Feed gap; 33. Limiting step; 34. Positioning step; 40. Motor. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0029] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0030] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of this invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0034] Please see Figure 4 and combined Figure 2 and Figure 3As shown, the present invention discloses a coffee bean crushing structure, including an upper cutter disc 11, a lower cutter disc 21, and a cutter disc clamping block 22. The cutter disc clamping block 22 is pressed onto the middle of the lower cutter disc 21 to lock the lower cutter disc 21. The opposite end faces of the upper cutter disc 11 and the lower cutter disc 21 are provided with cutting edges. Both the upper cutter disc 11 and the lower cutter disc 21 have a structure with a thicker outer edge and a thinner inner edge. Therefore, the upper cutter disc 11 and the lower cutter disc 21 are adapted to form a grinding gap 23e for grinding coffee beans. The grinding gap 23e is relatively larger on the center side and relatively smaller on the outer edge side.

[0035] The upper cutter disc 11 of this utility model is equipped with a guide sleeve 24 in the middle. The upper part of the cutter disc clamping block 22 protrudes outward to form a pre-grinding column 30. The central axis of the pre-grinding column 30 is eccentrically set with the central axis of the guide sleeve 24. When the upper cutter disc 11 and the lower cutter disc 21 rotate relative to each other, the distance b / c between the outer edge surface of the pre-grinding column 30 and the inner edge surface of the guide sleeve 24 forms a pre-crushing gap 245 that changes periodically.

[0036] In use, the coffee beans to be processed are placed in the feed sleeve 24. Since the size of the pre-crushing gap 245 is different in different circumferential directions, and the smallest gap between the two is smaller than the diameter of the coffee bean, while the largest gap is also slightly smaller than the diameter of the coffee bean, when the lower cutter disc 21 at the bottom drives the pre-grinding column 30 to rotate, the coffee beans will be squeezed into the gap under the drive of the pre-grinding column 30. As the gap changes, pre-crushing is carried out, and then the beans enter the grinding gap 23 between the upper cutter disc 11 and the lower cutter disc 21 for grinding and crushing.

[0037] Compared with the prior art, the present invention can pre-crush coffee beans through the pre-crushing gap 245, thereby reducing the grinding pressure of the lower blade 21 and the upper blade 11, controlling the amount and speed of coffee bean intake, avoiding large coffee bean particles, insufficient grinding of the upper blade 11 and the lower blade 21, affecting the uniformity of coffee grinding, and ensuring the taste of coffee.

[0038] To avoid feeding too many coffee beans at once, which could cause them to get stuck in the grinding gap 23 and overload the motor 40, this invention also provides a spiral guide belt 31 on the outer surface of the pre-grinding column 30. The guide belt 31 protrudes from the surface of the pre-grinding column 30. The spiral guide belt 31 can effectively control the speed at which coffee beans are fed into the grinding gap 23. This not only avoids the problem of coffee beans getting stuck in the pre-crushing gap 245 and ensures that the coffee beans are pre-ground smoothly, but also prevents too much material from rushing into the grinding gap 23e at once, which would affect the quality of coffee grinding.

[0039] Furthermore, to ensure the pre-crushing effect, this invention also forms a grinding body 243 protruding outward from one side of the inner edge of the guide sleeve 24. Preferably, a spiral guide belt 31 is provided on the outer circumference of the pre-grinding column 30 of this invention, and the grinding body 243 and the guide belt 31 are intermittently arranged opposite each other. Through the design of the grinding body 243 and the guide belt 31, the pre-crushing efficiency can be improved.

[0040] This utility model also provides a coffee bean grinder, including the above-mentioned coffee bean crushing structure, and the coffee bean grinder further includes an upper cutter head holder 10 and a lower cutter head holder 20. The upper cutter head 11 is installed in the upper cutter head holder 10, and the lower cutter head 21 is installed in the lower cutter head holder 20. The lower cutter head holder 20 is connected to the output shaft of the motor 40 to drive the lower cutter head 21 to rotate relative to the upper cutter head.

[0041] Specifically, the bottom of the pre-grinding column 30 of this utility model is conical and connected to the cutter disc clamping block 22. The outer edge of the cutter disc clamping block 22 is conical, and the top surface of the cutter disc clamping block 22 and the end face of the upper cutter disc 11 form a feeding gap 32d.

[0042] In this invention, the inner edge surface of the lower cutter disc 21 is provided with a limiting step 33, and the bottom of the cutter disc clamping block 22 is provided with a positioning step 34 that is adapted to the limiting step 33.

[0043] The outer edge of the guide sleeve 24 of this utility model extends outward to form a flange 241. The flange 241 is equipped with a bolt 242 connected to the upper cutter head frame 10. The pre-grinding column 30 and the cutter head clamping block 22 are integral structures. The cutter head clamping block 22 and the lower cutter head frame are locked together by the bolt 242 installed on the cutter head clamping block 22.

[0044] The inner edge of the guide sleeve 24 of this utility model is eccentrically positioned relative to the outer edge of the pre-grinding column 30. This makes the distance between the outer edge of the pre-grinding column 30 and the inner edge of the guide sleeve 24, forming a pre-crushing gap 245, shaped like a cam.

[0045] like Figure 3 and Figure 4 As shown, the cutter disc clamping block 22 of this utility model is provided with a mating surface, and the top surface of the cutter disc clamping block 22 and the end surface of the upper cutter disc 11 form a feeding gap 32d.

[0046] When the coffee bean grinder is working, the coffee beans are carried by the feed belt 31 from the larger gap c of the pre-crushing gap 245 to the smaller gap b, thus being crushed into medium-sized particles. Particles smaller than the feed gap 32d enter the grinding gap 23e of the burr grinding area, while larger particles continue to be ground until they are smaller than the feed gap 32d, at which point they enter the grinding gap 23e of the burr grinding area. The coffee bean particles entering the grinding gap 23e of the burr grinding area are smaller, have a more uniform size distribution, and result in lower overall grinding power.

[0047] This embodiment can control the size of coffee bean particles entering the grinding zone 23e by controlling the feeding gap 32d. It should be noted that the grinding gap 23e of the grinding zone of this utility model can be adjusted by adjusting the relative position of the upper blade holder 10 to the lower blade holder 20. At the same time, the coarseness of the ground coffee powder can be controlled by adjusting the gap between the upper blade holder 11 and the lower blade holder 21.

[0048] It should be noted that this embodiment can control the grinding efficiency by controlling the pitch of the spiral cutting edge. The guide belt 31 of this invention can also act on the coffee beans as they are squeezed into the pre-crushing gap 245, grinding and cutting the coffee beans.

[0049] Among them, the guide sleeve 24 and the upper cutter head holder 10 (or upper cutter head 11) can be integrally formed, and the cutter head clamping block 22 and the lower cutter head holder 20 (or lower cutter head 21) can be integrally formed, or they can be set as separate structures.

[0050] The coffee bean crushing structure of this invention features a pre-grinding column 30 in the middle of the lower cutter disc 21, combined with a guide sleeve 24 in the middle of the upper cutter disc 11. The pre-grinding column 30 and the guide sleeve 24 are eccentrically positioned. After the coffee beans pass through the guide sleeve 24, they are crushed under their own weight, passing through the gap between the pre-grinding column 30 and the guide sleeve 24. Meanwhile, the lower cutter disc 21 rotates relative to the upper cutter disc 11. Therefore, as the coffee beans pass through the gap, they are pre-crushed as the gap rotates, before entering the gap between the upper and lower cutter discs 11 for grinding. This effectively alleviates the problem of excessive coffee beans being fed in at once, resulting in uneven grinding. Furthermore, it effectively prevents a large number of whole coffee beans from accumulating between the upper and lower cutter discs 11 and 21, thus avoiding a large instantaneous load during grinding, which could lead to motor 40 protection failure, machine jamming, and component damage.

[0051] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coffee bean fragment structure, characterized in that, The device includes an upper cutter disc, a lower cutter disc, and a cutter disc clamping block. The cutter disc clamping block is pressed against the middle of the lower cutter disc. The upper cutter disc and the lower cutter disc are adapted to form a grinding gap for grinding coffee beans. A guide sleeve is installed in the middle of the upper cutter disc. The upper part of the cutter disc clamping block protrudes outward to form a pre-grinding column. The central axis of the pre-grinding column is eccentrically set with respect to the central axis of the guide sleeve. When the upper cutter disc and the lower cutter disc rotate relative to each other, the distance between the outer edge surface of the pre-grinding column and the inner edge surface of the guide sleeve changes periodically.

2. The coffee bean crushing structure as described in claim 1, characterized in that, A spiral guide belt is provided on the outer circular surface of the pre-grinding column, and the guide belt protrudes from the surface of the pre-grinding column.

3. The coffee bean crushing structure as described in claim 2, characterized in that, The bottom of the pre-grinding column is conical and connected to the cutter head clamping block.

4. The coffee bean crushing structure as described in claim 3, characterized in that, The outer edge of the cutter disc clamping block is conical, and the top surface of the cutter disc clamping block and the end face of the upper cutter disc form a feeding gap.

5. The coffee bean crushing structure as described in claim 4, characterized in that, The inner edge of the lower cutter head is provided with a limiting step, and the bottom of the cutter head clamping block is provided with a positioning step that matches the limiting step.

6. The coffee bean crushing structure as described in claim 1, characterized in that, The inner edge of the guide sleeve protrudes outward to form a grinding body.

7. The coffee bean crushing structure as described in claim 6, characterized in that, A spiral guide belt is provided on the outer circular surface of the pre-grinding column, and the grinding body and the guide belt are intermittently arranged opposite each other.

8. A coffee bean grinder, characterized in that, The coffee bean grinder includes the coffee bean crushing structure as described in any one of claims 1-7, and further includes an upper cutter head holder and a lower cutter head holder, wherein the upper cutter head is installed in the upper cutter head holder, the lower cutter head is installed in the lower cutter head holder, and the lower cutter head holder is connected to the output shaft of a motor to drive the lower cutter head to rotate relative to the upper cutter head.

9. The coffee bean grinder as described in claim 8, characterized in that, The outer edge of the guide sleeve extends outward to form a flange, and a bolt connected to the upper cutter head frame is installed on the flange.

10. The coffee bean grinder as described in claim 8, characterized in that, The pre-grinding column and the cutter head clamping block are an integral structure, and the cutter head clamping block and the lower cutter head frame are locked together by bolts installed on the cutter head clamping block.

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