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 is pressed against the cutter head pressing block; 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 of passing 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] The present invention relates to the technical field of coffee bean grinders, and more specifically, to a coffee bean crushing structure and a coffee bean grinder. Background Art

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

[0003] While a larger blade brings higher efficiency, it will inevitably require a larger motor power. Therefore, either the motor specifications are increased, the motor volume is increased, and the motor load capacity is increased, which will increase the overall volume of the equipment and manufacturing costs; or, when using the equipment, the material is fed intermittently and slowly, resulting in a poor experience.

[0004] At present, some manufacturers on the market use feed screws or feed baffles to control the feed 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 blade.

[0005] A coffee bean grinder that prevents the adjustment disc from falling off, as disclosed in Chinese patent application CN219557055U, is a common coffee bean grinder. In this structure, the middle shaft 1 is connected to the motor to provide power for the operation of the coffee bean grinder. The lower cutter disc 3 is fixed to the lower cutter disc frame 2 by the lower cutter disc pressing block 4. The middle shaft 1, the lower cutter disc frame 2, the lower cutter disc 3, and the lower cutter disc pressing block 4 are a whole. When working, they rotate around the central axis of the motor driven by the motor to grind coffee beans. The upper cutter disc 6 is fixed to the upper cutter disc frame 5, and the upper cutter disc frame 5 can move up and down along the motor axis. By adjusting the position of the upper cutter disc frame 5, the gap between the upper cutter disc 6 and the lower cutter disc 3 can be adjusted, thereby controlling the coarseness of the ground coffee powder.

[0006] In this conventional design, the blade is thick outside and thin inside. Figure 1 As shown in the figure, the gap between the two blade discs near the edge is smaller, while the gap between the two blade discs far from the edge is larger. When the grinder is working, a large number of whole coffee beans are easily gathered in area a at the same time. The load at the moment of grinding is large, which may cause consequences such as motor protection, machine jamming, and component damage. Moreover, coffee beans with larger particles need to be ground in the center first. Only when they are ground to a certain particle shape can they enter the edge of the blade disc for fine grinding. This not only results in low grinding efficiency, but also uneven grinding fineness of the 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. Summary of the invention

[0008] The present invention 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 in existing coffee machines.

[0009] According to one aspect of the present invention, there is provided a coffee bean crushing structure, comprising an upper cutter disc, a lower cutter disc and a cutter disc pressing block, wherein the cutter disc pressing block is pressed on the middle part of the lower cutter disc, and the upper cutter disc and the lower cutter disc are adapted to form a grinding gap for grinding coffee beans; a material guide sleeve is installed in the middle part of the upper cutter disc, and the upper part of the cutter disc pressing block protrudes outward to form a pre-grinding column, and the central axis of the pre-grinding column is eccentrically arranged with the central axis of the material guide sleeve, and when the upper cutter disc and the lower cutter disc rotate relative to each other, the distance formed by the outer edge surface of the pre-grinding column and the inner edge surface of the material guide sleeve changes periodically.

[0010] Preferably, based on the above solution, a spiral material guide belt is provided on the outer circumferential surface of the pre-grinding column, and the material guide belt protrudes from the surface of the pre-grinding column.

[0011] Preferably, based on the above solution, the bottom of the pre-grinding column is conical and connected to the cutter disc pressing block.

[0012] Preferably, based on the above scheme, the outer edge surface of the cutter disc clamping block is conical, and the top end surface of the cutter disc clamping block and the end surface of the upper cutter disc form a feed gap.

[0013] Preferably, based on the above solution, a limiting step is provided on the inner edge surface of the lower cutter disc, and a positioning step matched with the limiting step is provided at the bottom of the cutter disc clamping block.

[0014] Preferably, based on the above solution, one side of the inner edge surface of the material guiding sleeve protrudes outward to form a grinding body.

[0015] Preferably, based on the above solution, a spiral material guide belt is provided on the outer circumferential surface of the pre-grinding column, and the grinding body and the material guide belt are intermittently arranged relative to each other.

[0016] The present invention also provides a coffee bean grinder, comprising the above-mentioned coffee bean crushing structure, and the coffee bean grinder also includes an upper cutter disc frame and a lower cutter disc frame, the upper cutter disc is installed in the upper cutter disc frame, the lower cutter disc is installed in the lower cutter disc frame, and the lower cutter disc frame is connected to the output shaft of the motor to drive the lower cutter disc to rotate relative to the upper cutter disc.

[0017] Preferably, based on the above solution, the outer edge surface of the material guide sleeve extends outward to form a flange, and bolts connected to the upper cutter disc frame are installed on the flange.

[0018] Preferably, based on the above scheme, the pre-grinding column and the cutter disc clamping block are an integrated structure, and the cutter disc clamping block and the lower tool holder are locked by bolts installed on the cutter disc clamping block.

[0019] The coffee bean crushing structure of the present invention is characterized in that a pre-grinding column is arranged in the middle of the lower cutter disc and a material guide sleeve is arranged in the middle of the upper cutter disc. The pre-grinding column and the material guide sleeve are arranged eccentrically. After the coffee beans enter the material guide sleeve, they pass through the gap between the pre-grinding column and the material guide sleeve under the action of their own gravity, and the lower cutter disc rotates relative to the upper cutter disc. Therefore, in the process of the coffee beans passing through the gap, the coffee beans will be pre-crushed as the gap rotates, and then enter the gap formed by the upper cutter disc and the lower cutter disc for grinding. On the one hand, it can effectively alleviate the problem of uneven grinding caused by too much coffee beans being introduced at one time. On the other hand, it can also effectively avoid a large number of whole coffee beans gathering between the upper cutter disc and the lower cutter disc, resulting in a large load at the moment of grinding, leading to motor protection, machine jamming, and component damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

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

[0022] Figure 2 is a cross-sectional view of the coffee bean crushing structure of the present invention;

[0023] Figure 3 A three-dimensional diagram of the coffee bean crushing structure of the present invention;

[0024] Figure 4 It is a three-dimensional structural diagram of the cutter head pressing block and the pre-grinding column of the present invention;

[0025] Description of Figure Numbers:

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

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0029] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0030] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0031] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. 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, the indications of these directions also change accordingly.

[0032] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] See also Figure 4 , and combined with Figure 2 and Figure 3As shown, a coffee bean crushing structure of the present invention comprises an upper cutter disc 11, a lower cutter disc 21 and a cutter disc pressing block 22, the cutter disc pressing block 22 is pressed on the middle part 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, and the upper cutter disc 11 and the lower cutter disc 21 are both in a structure with a thick outer edge surface and a thin inner edge surface, therefore, the upper cutter disc 11 and the lower cutter disc 21 are adapted to form a grinding gap 23e for grinding coffee beans, and the grinding gap 23e is also in a state that the grinding gap 23e on the center side is relatively large, while the grinding gap 23e on the outer edge side is relatively small.

[0035] A material guide sleeve 24 is installed in the middle of the upper cutter disc 11 of the present invention, and 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 arranged with the central axis of the material 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 material guide sleeve 24 to form a pre-crushing gap 245 changes periodically.

[0036] When in use, the coffee beans to be processed are placed in the guide sleeve 24. Since the pre-crushing gap 245 has different sizes in different circumferential directions, and the minimum position of the gap between the two is smaller than the diameter of the coffee beans, and the maximum position is also slightly smaller than the diameter of the coffee beans, therefore, 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 driven by the pre-grinding column 30, and will be pre-crushed as the gap changes, and then 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 the coffee beans through the pre-crushing gap 245 to reduce the grinding pressure of the lower blade disc 21 and the upper blade disc 11, control the amount and speed of coffee beans entering, avoid large coffee bean particles, and avoid insufficient grinding of the upper blade disc 11 and the lower blade disc 21, which affects the uniformity of coffee grinding and ensures the taste of coffee.

[0038] In order to avoid introducing too many coffee beans at one time, which may cause the coffee beans to get stuck in the grinding gap 23 and cause excessive load on the motor 40, the present invention further provides a spiral guide belt 31 on the outer circumferential surface of the pre-grinding column 30, and the guide belt 31 protrudes from the surface of the pre-grinding column 30. The speed of introducing the coffee beans into the grinding gap 23 can be effectively controlled by the spirally arranged guide belt 31, which can not only avoid the problem of coffee beans getting stuck in the pre-crushing gap 245 and ensure smooth pre-grinding of the coffee beans, but also avoid too much material from pouring into the grinding gap 23e at one time, affecting the coffee grinding quality.

[0039] Furthermore, in order to ensure the pre-crushing effect, the present invention also forms a grinding body 243 protruding outward on one side of the inner edge surface of the guide sleeve 24. Preferably, a spiral guide belt 31 is provided on the outer circumferential surface of the pre-grinding column 30 of the present invention, and the grinding body 243 and the guide belt 31 are intermittently arranged opposite to each other. The design of the grinding body 243 and the guide belt 31 can improve the efficiency of pre-crushing.

[0040] The present invention also provides a coffee bean grinder, comprising the above-mentioned coffee bean crushing structure, and the coffee bean grinder also includes an upper cutter disc frame 10 and a lower cutter disc frame 20, the upper cutter disc 11 is installed in the upper cutter disc frame 10, the lower cutter disc 21 is installed in the lower cutter disc frame 20, and the lower cutter disc frame 20 is connected to the output shaft of the motor 40 to drive the lower cutter disc 21 to rotate relative to the upper cutter disc.

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

[0042] In the present invention, a limiting step 33 is arranged on the inner edge surface of the lower cutter disc 21 , and a positioning step 34 matched with the limiting step 33 is arranged at the bottom of the cutter disc pressing block 22 .

[0043] The outer edge surface of the guide sleeve 24 of the present invention extends outward to form a flange 241, and the flange 241 is equipped with a bolt 242 connected to the upper cutter disc frame 10. The pre-grinding column 30 and the cutter disc clamping block 22 are an integrated structure, and the cutter disc clamping block 22 and the lower cutter frame are locked by the bolt 242 installed on the cutter disc clamping block 22.

[0044] The inner edge surface of the guide sleeve 24 of the present invention is eccentrically arranged relative to the outer edge surface of the pre-grinding column 30, so that the distance between the outer edge surface of the pre-grinding column 30 and the inner edge surface of the guide sleeve 24 forming the pre-crushing gap 245 is arranged in a cam shape.

[0045] like Figure 3 and Figure 4 As shown, the cutter disc pressing block 22 of the present invention is provided with a matching surface, and the top end surface of the cutter disc pressing block 22 and the end surface of the upper cutter disc 11 form a feed gap 32d.

[0046] When the coffee bean grinder is working, the coffee beans are driven by the guide belt 31 from the larger spacing c of the pre-crushing gap 245 to the smaller spacing b of the pre-crushing gap 245, thereby being ground into medium particles. Particles with a size smaller than the feed gap 32d enter the grinding gap 23e of the blade grinding area, and large particles continue to be ground until they enter the grinding gap 23e of the blade grinding area after their size is smaller than the feed gap 32d. The coffee bean particles entering the grinding gap 23e of the blade grinding area are small, have a uniform size distribution, and have a low overall grinding power.

[0047] This embodiment can control the size of coffee bean particles entering the grinding gap 23e of the grinding area by controlling the feed gap 32d; it should be noted that the grinding gap 23e of the grinding area of ​​the present invention can be adjusted by adjusting the relative position of the upper blade frame 10 with respect to the lower blade frame 20, that is, the gap between the two can be adjusted, and the gap between the upper blade frame 11 and the lower blade frame 21 can also be adjusted to control the coarseness of the ground coffee powder.

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

[0049] The material guide sleeve 24 and the upper cutter disc frame 10 (or the upper cutter disc 11) can be integrally formed, and the cutter disc clamping block 22 and the lower cutter disc frame 20 (or the lower cutter disc 21) can be integrally formed, or they can be provided as separate structures.

[0050] The coffee bean crushing structure of the present invention is provided with a pre-grinding column 30 in the middle of the lower cutter disc 21 and a material guide sleeve 24 in the middle of the upper cutter disc 11. The pre-grinding column 30 and the material guide sleeve 24 are eccentrically arranged. After the coffee beans are in the material guide sleeve 24, they pass through the gap between the pre-grinding column 30 and the material guide sleeve 24 under the action of their own gravity, and the lower cutter disc 21 rotates relative to the upper cutter disc 11. Therefore, in the process of the coffee beans passing through the gap, the coffee beans will be pre-crushed as the gap rotates, and then enter the gap formed by the upper cutter disc 11 and the lower cutter disc 21 for grinding. On the one hand, it can effectively alleviate the problem of excessive introduction of coffee beans at one time, resulting in uneven grinding. On the other hand, it can also effectively avoid the accumulation of a large number of whole coffee beans between the upper cutter disc 11 and the lower cutter disc 21, resulting in a large load at the moment of grinding, resulting in the consequences of motor 40 protection, machine jamming, and component damage.

[0051] Finally, the method of the present application is only a preferred implementation scheme and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Coffee bean crushing structure, characterized in that: It comprises an upper cutter disc, a lower cutter disc and a cutter disc pressing block, wherein the cutter disc pressing block is pressed on the middle part of the lower cutter disc, and the upper cutter disc and the lower cutter disc are adapted to form a grinding gap for grinding coffee beans; a material guide sleeve is installed in the middle part of the upper cutter disc, and the upper part of the cutter disc pressing block protrudes outward to form a pre-grinding column, and the central axis of the pre-grinding column is eccentrically arranged with the central axis of the material guide sleeve, and when the upper cutter disc and the lower cutter disc rotate relative to each other, the distance formed by the outer edge surface of the pre-grinding column and the inner edge surface of the material guide sleeve changes periodically.

2. The coffee bean crushing structure according to claim 1, characterized in that: A spiral material guide belt is arranged on the outer circumferential surface of the pre-grinding column, and the material guide belt protrudes from the surface of the pre-grinding column.

3. The coffee bean crushing structure according to claim 2, characterized in that: The bottom of the pre-grinding column is conical and connected to the cutter disc pressing block.

4. The coffee bean crushing structure according to claim 3, characterized in that: The outer edge surface of the cutter disc pressing block is conical, and the top end surface of the cutter disc pressing block and the end surface of the upper cutter disc form a feeding gap.

5. The coffee bean crushing structure according to claim 4, characterized in that: A limiting step is arranged on the inner edge surface of the lower cutter disc, and a positioning step matched with the limiting step is arranged at the bottom of the cutter disc pressing block.

6. The coffee bean crushing structure according to claim 1, characterized in that: One side of the inner edge surface of the material guiding sleeve protrudes outwards to form a grinding body.

7. The coffee bean crushing structure according to claim 4, characterized in that: A spiral material guide belt is arranged on the outer circumferential surface of the pre-grinding column, and the grinding body and the material guide belt are intermittently arranged opposite to each other.

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

9. The coffee bean grinder according to claim 8, characterized in that The outer edge surface of the material guide sleeve extends outward to form a flange, and bolts connected to the upper cutter disc frame are installed on the flange.

10. The coffee bean grinder according to claim 8, characterized in that The pre-grinding column and the cutter disc clamping block are an integrated structure, and the cutter disc clamping block and the lower tool holder are locked by bolts installed on the cutter disc clamping block.

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