Grinding structure and grinding assembly

Abstract

The embodiment of the utility model discloses a grinding structure and a grinding assembly, the grinding structure comprises a first grinding part and a second grinding part, the first grinding part comprises at least one of a flat grinding structure and a cone grinding structure, the second grinding part comprises a plurality of grinding cutters, and the plurality of grinding cutters are arranged on the first grinding part. According to the grinding structure, the multiple grinding cutters are arranged to pre-cut the materials, the size of the materials can be reduced, follow-up secondary grinding of the materials is facilitated, the materials can be ground finer and more evenly, and the grinding quality and efficiency are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of grinding equipment, and in particular to a grinding structure and a grinding component. Background Art

[0002] When making freshly ground coffee, the coffee beans must first be ground into coffee powder, which is usually achieved using manual or electric grinding equipment. The grinding tool is the core component of the above-mentioned grinding equipment. The particle size, particle uniformity and particle shape of the coffee powder will affect the taste of the brewed coffee. Therefore, there are high requirements for the grinding tools used in grinding coffee beans and similar materials.

[0003] However, when a large volume of material falls directly onto the grinding tool without being cut, it will inevitably affect the grinding quality and efficiency of the grinding tool, resulting in coarser particles and greatly reduced uniformity of the final powder, which is difficult to meet the actual needs of users. Utility Model Content

[0004] Based on this, it is necessary to provide a grinding structure and a grinding assembly that can grind materials finer and more evenly.

[0005] A grinding structure includes: a first grinding piece and a second grinding piece, wherein the first grinding piece includes at least one of a flat grinding structure and a conical grinding structure, and the second grinding piece includes a plurality of grinding knives, wherein the plurality of grinding knives are all arranged on the first grinding piece.

[0006] In one embodiment, the grinding blade is inclined from the top end of the grinding blade to the bottom end of the grinding blade toward the axis direction close to the first grinding member.

[0007] In one embodiment, the inclination angle of the grinding knife is 10 to 85 degrees.

[0008] In one embodiment, the plurality of grinding blades are evenly distributed in an array centered on the axis of the first grinding member.

[0009] In one embodiment, a convex portion is disposed at the top end of the first grinding member, the convex portion is located in the axial direction of the first grinding member, and a plurality of grinding blades are spaced apart and disposed on the outer periphery of the convex portion.

[0010] In one of the embodiments, the grinding knife is provided with a grinding groove.

[0011] In one embodiment, the first grinding member includes the flat grinding structure, which includes a first grinding body and a plurality of first grinding ribs spaced apart on the periphery of the first grinding body, and the plurality of grinding blades are all disposed on the top of the first grinding body.

[0012] In one embodiment, the first grinding member includes the conical grinding structure, which includes a second grinding body and a first introduction tooth groove and a first grinding tooth groove arranged on the outer side wall of the second grinding body from top to bottom, and the plurality of grinding knives are all arranged on the top of the second grinding body.

[0013] In one embodiment, the first grinding member includes the flat grinding structure and the conical grinding structure, the conical grinding structure is arranged at the top of the flat grinding structure, the flat grinding structure includes a first grinding body and a plurality of first grinding ribs arranged at intervals on the outer periphery of the first grinding body, the conical grinding structure includes a second grinding body and a first introduction tooth groove and a first grinding tooth groove arranged on the outer side wall of the second grinding body in sequence from top to bottom, the second grinding body is arranged at the top of the first grinding body, and the plurality of grinding knives are all arranged at the top of the second grinding body.

[0014] A grinding assembly, characterized in that it comprises: a grinding body and the above-mentioned grinding structure, wherein the grinding body is a hollow structure, and the grinding structure is arranged in the grinding body.

[0015] In one of the embodiments, the inner side wall of the grinding body is provided with a second introduction tooth groove and a second grinding tooth groove in sequence from top to bottom.

[0016] In one of the embodiments, a plurality of second grinding ribs are arranged on the bottom wall of the grinding body at intervals along the circumferential direction.

[0017] In one of the embodiments, a plurality of third introduction tooth grooves are arranged on the inner side wall of the grinding body at intervals along the circumferential direction.

[0018] In one embodiment, the maximum rotation diameter of the grinding knife is smaller than the diameter of the smallest inner hole of the grinding body.

[0019] The grinding structure provided in the present application, when in use, is driven to rotate by an external power source. During rotation, the material to be ground is first converted from large-volume particles into small-volume particles under the pre-cutting action of multiple grinding knives arranged on the first grinding piece. When the pre-cut material falls from the grinding knife onto the first grinding piece, the first grinding piece further grinds the pre-cut material to form powder. Therefore, the above-mentioned grinding structure helps to reduce the volume of the material by configuring multiple grinding knives to pre-cut the material, facilitates the subsequent secondary grinding of the material, and enables the material to be ground finer and more evenly, thereby effectively improving the grinding quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 is a schematic structural diagram of a grinding structure in an embodiment;

[0022] Figure 2 is a schematic structural diagram of a grinding structure in another embodiment;

[0023] Figure 3 is a schematic structural diagram of a grinding structure in yet another embodiment;

[0024] Figure 4 is a schematic structural diagram of a grinding assembly in one embodiment;

[0025] Figure 5 is a schematic structural diagram of a grinding body in one embodiment;

[0026] Figure 6 It is a schematic structural diagram of a grinding body in another embodiment. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] like Figures 1 to 3 As shown, the present application provides a grinding structure 10, which is used to grind materials to obtain powders, and the materials can be coffee beans, soybeans, black beans, pepper, sesame, walnuts, etc.; the grinding structure 10 includes a first grinding piece 100 and a second grinding piece 200, the first grinding piece 100 includes at least one of a flat grinding structure 101 and a conical grinding structure 102, and the second grinding piece 200 includes a plurality of grinding knives 210, and the plurality of grinding knives 210 are all arranged on the first grinding piece 100.

[0031] The grinding structure 10 provided in the present application, when in use, is driven to rotate by an external power source. During rotation, the material to be ground is first converted from large-volume particles into small-volume particles under the pre-cutting action of multiple grinding knives 210 arranged on the first grinding piece 100. When the pre-cut material falls from the grinding knife 210 onto the first grinding piece 100, the first grinding piece 100 will further grind the pre-cut material to obtain powder. Therefore, the above-mentioned grinding structure 10 helps to reduce the volume of the material by configuring multiple grinding knives 210 to pre-cut the material, facilitates the subsequent secondary grinding of the material, and enables the material to be ground finer and more evenly, thereby effectively improving the grinding quality and efficiency.

[0032] Furthermore, the grinding knife 210 is inclined from the top end of the grinding knife 210 to the bottom end of the grinding knife 210 toward the axis direction close to the first grinding member 100. Preferably, the inclination angle of the grinding knife 210 is 10 to 85 degrees, wherein the inclination angle of the grinding knife 210 can be defined as the angle formed between the grinding knife 210 and the horizontal plane. Specifically, different inclination angles of the grinding knife 210 are suitable for pre-cutting different materials, for example, an inclination angle of 45 degrees is suitable for pre-cutting coffee beans, an inclination angle of 50 degrees is suitable for pre-cutting soybeans, and an inclination angle of 60 degrees is suitable for pre-cutting pepper, etc. In addition, by setting the inclination angle of the grinding knife 210 to 10 to 85 degrees, it is avoided that the material is stuck due to the inclination angle of the grinding knife 210 being set too small, and at the same time, it is avoided that the crushing effect is lost due to the inclination angle of the grinding knife 210 being set too large.

[0033] Furthermore, the plurality of grinding knives 210 are evenly distributed in an array around the axis of the first grinding member 100. The central symmetric arrangement of the plurality of grinding knives 210 has a better rotational balance, which helps to improve the operating stability of the grinding structure 10, extend the service life, reduce noise, and effectively improve the user experience while ensuring the cutting effect of the material.

[0034] like Figure 1 As shown, a convex portion 110 is disposed at the top of the first grinding member 100 , the convex portion 110 is located in the axial direction of the first grinding member 100 , and a plurality of grinding blades 210 are disposed at intervals on the outer periphery of the convex portion 110 .

[0035] The grinding blade 210 is provided with a grinding groove 212, which is used to increase the contact area between the grinding blade 210 and the material, so that the material can be cut more evenly by the grinding blade 210, so as to facilitate the subsequent further grinding of the material. The grinding groove 212 may be in a triangular or rectangular shape, and at least one side of the grinding blade 210 is provided with at least one grinding groove 212, specifically, at least one grinding groove 212 is provided on opposite sides of the grinding blade 210.

[0036] like Figure 4 As shown, the present application further provides a grinding assembly, which includes a grinding body 20 and the above-mentioned grinding structure 10 . The grinding body 20 is a hollow structure, and the grinding structure 10 is disposed inside the grinding body 20 .

[0037] When in use, the grinding structure 10 is driven to rotate relative to the grinding body 20 by an external power source. The material to be ground is first converted from large-volume particles into small-volume particles under the pre-cutting action of the multiple grinding knives 210 of the grinding structure 10. When the pre-cut material falls from the grinding knives 210 into between the first grinding piece 100 and the grinding body 20, the first grinding piece 100 will cooperate with the grinding body 20 to further grind the pre-cut material to form powder.

[0038] Preferably, the maximum rotation diameter of the grinding blade 210 is smaller than the diameter of the smallest inner hole of the grinding body 20. This arrangement prevents the grinding blade 210 from being stuck in the grinding body 20 and being unable to be smoothly removed from the inner hole of the grinding body 20, making the disassembly of the grinding structure 10 more convenient and improving the user experience.

[0039] like Figure 1 and Figure 5 As shown, in an optional embodiment, the first grinding piece 100 includes a flat grinding structure 101, the flat grinding structure 101 includes a first grinding body 120 and a plurality of first grinding ribs 130 spaced apart on the periphery of the first grinding body 120, and a plurality of grinding knives 210 are all disposed at the top of the first grinding body 120.

[0040] The bottom wall of the grinding body 20 is provided with a plurality of second grinding ribs 21 at intervals along the circumferential direction. Each second grinding rib 21 is used to cooperate with each first grinding rib 130 to further finely grind the material.

[0041] Specifically, when in use, the grinding structure 10 is driven to rotate relative to the grinding body 20 by an external power source. The material to be ground is first converted from large-volume particles into small-volume particles under the pre-cutting action of multiple grinding knives 210 of the grinding structure 10. When the pre-cut material falls from the grinding knife 210 between the first grinding rib 130 and the second grinding rib 21, the first grinding ribs 130 of the first grinding member 100 will cooperate with the corresponding second grinding ribs 21 of the grinding body 20 to further fine-grind the pre-cut material to form powder.

[0042] Specifically, the first grinding body 120 is a disc structure, the first grinding rib 130 is a rectangular structure, the first grinding rib 130 extends radially along the first grinding body 120, and multiple first grinding ribs 130 are evenly spaced along the circumferential direction of the first grinding body 120. The width of the first grinding rib 130 gradually increases from the first end of the first grinding rib 130 to the second end of the first grinding rib 130. The first end of the first grinding rib 130 is an end of the first grinding rib 130 close to the center of the first grinding body 120, and the second end of the first grinding rib 130 is an end of the first grinding rib 130 away from the center of the first grinding body 120. The second end face of the first grinding rib 130 is flush with the outer circumferential surface of the first grinding body 120, and the convex portion 110 is arranged at the center position of the top of the first grinding body 120.

[0043] Furthermore, the shape of the second grinding rib 21 matches the shape of the first grinding rib 130. The second grinding rib 21 can specifically be a rectangular structure. The second grinding rib 21 extends radially along the grinding body 20. Multiple second grinding ribs 21 are evenly spaced along the circumferential direction of the grinding body 20. The width of the second grinding rib 21 gradually increases from the first end of the second grinding rib 21 to the second end of the second grinding rib 21. The first end of the second grinding rib 21 is the end of the second grinding rib 21 close to the center of the grinding body 20, and the second end of the second grinding rib 21 is the end of the second grinding rib 21 away from the center of the grinding body 20.

[0044] like Figure 1 As shown, optionally, the flat grinding structure 101 further includes a paddle 140, which is disposed on the first grinding body 120 and located between the protrusion 110 and the first grinding rib 130. The paddle 140 is used to paddle the pre-cut material to the first grinding rib 130 for further fine grinding. There are multiple paddles 140, which are disposed on the first grinding body 120 at intervals. The paddle 140 is spiral-shaped and extends spirally around the axial direction of the first grinding body 120. The width of the paddle 140 gradually increases from the first end of the paddle 140 to the second end of the paddle 140. The first end of the paddle 140 is an end of the paddle 140 close to the protrusion 110, and the second end of the paddle 140 is an end of the paddle 140 away from the protrusion 110.

[0045] like Figure 2 and Figure 6 As shown, in an optional embodiment, the first grinding member 100 includes a conical grinding structure 102, the conical grinding structure 102 includes a second grinding body 150 and a first introduction tooth groove 151 and a first grinding tooth groove 152 arranged on the outer wall of the second grinding body 150 from top to bottom, a plurality of grinding knives 210 are all arranged at the top of the second grinding body 150, and the protrusion 110 is arranged at the center position of the top of the second grinding body 150.

[0046] The inner wall of the grinding body 20 is provided with a second introduction tooth groove 22 and a second grinding tooth groove 23 from top to bottom. An introduction and crushing channel is formed between the first introduction tooth groove 151 and the second introduction tooth groove 22, and a grinding and crushing channel is formed between the first grinding tooth groove 152 and the second grinding tooth groove 23. The introduction and crushing channel is used for coarse grinding and introducing materials, and the grinding and crushing channel is used for further fine grinding of materials.

[0047] Specifically, when in use, the grinding structure 10 is driven to rotate relative to the grinding body 20 by an external power source, and the material to be ground is first converted from large-volume particles into small-volume particles under the pre-cutting action of multiple grinding knives 210 of the grinding structure 10. The pre-cut material then falls into the introduction and crushing channel between the first introduction tooth groove 151 and the second introduction tooth groove 22, is continuously squeezed and crushed, and then moves downward into the grinding and crushing channel between the first grinding tooth groove 152 and the second grinding tooth groove 23 for further fine grinding to form powder.

[0048] like Figure 2 As shown, specifically, the second grinding body 150 is a conical structure. The first introduction tooth groove 151 is inclined and conically distributed from the upper end of the first introduction tooth groove 151 away from the center line of the second grinding body 150, and the first introduction tooth groove 151 is composed of a plurality of arc introduction teeth 153, and each arc introduction tooth 153 is inclined and conically distributed from the upper end of the arc introduction tooth 153 away from the center line of the second grinding body 150, and an introduction crushing channel is formed between adjacent arc introduction teeth 153.

[0049] The first grinding tooth groove 152 is inclined from the upper end of the first grinding tooth groove 152 away from the center line of the second grinding body 150 and is distributed in a cone shape. The first grinding tooth groove 152 is composed of a plurality of first triangular arc-shaped teeth 154. Each first triangular arc-shaped tooth 154 is inclined from the upper end of the first triangular arc-shaped tooth 154 away from the center line of the second grinding body 150 and is distributed in a cone shape and inclined along the circumferential direction of the second grinding body 150. A grinding and crushing channel is formed between adjacent first triangular arc-shaped teeth 154.

[0050] like Figure 6 As shown, the second introduction tooth groove 22 is inclined from the upper end of the second introduction tooth groove 22 to the center line of the grinding body 20 and is distributed in an inverted cone shape. The second introduction tooth groove 22 is composed of a plurality of triangular introduction teeth 24. Each triangular introduction tooth 24 is inclined from the upper end of the triangular introduction tooth 24 to the center line of the grinding body 20 and is distributed in an inverted cone shape. An introduction and crushing channel is formed between adjacent triangular introduction teeth 24. Optionally, the cross section of the triangular introduction tooth 24 can be, but is not limited to, a right triangle.

[0051] Optionally, the second inlet tooth groove 22 and the first inlet tooth groove 151 have different inclination directions, so that the gap of the inlet crushing channel is wider at the top and narrower at the bottom, which is more conducive to the extrusion and crushing of the material.

[0052] The second grinding tooth groove 23 is inclined from the upper end of the second grinding tooth groove 23 away from the center line of the grinding body 20 and is distributed in a cone shape. The second grinding tooth groove 23 is composed of a plurality of second triangular arc-shaped teeth 25. Each second triangular arc-shaped tooth 25 is inclined from the upper end of the second triangular arc-shaped tooth 25 away from the center line of the grinding body 20 and is distributed in a cone shape and inclined along the circumferential direction of the grinding body 20. A grinding and crushing channel is formed between adjacent second triangular arc-shaped teeth 25.

[0053] Specifically, the pre-cut material falls into the introduction and crushing channel between the first introduction tooth groove 151 and the second introduction tooth groove 22, is continuously squeezed and crushed, and then moves downward into the grinding and crushing channel between the first grinding tooth groove 152 and the second grinding tooth groove 23, and is further finely ground into powder under the joint cutting action of the first triangular arc tooth 154 and the second triangular arc tooth 25.

[0054] like Figure 3 and Figure 6 As shown, in an optional embodiment, the first grinding member 100 includes a flat grinding structure 101 and a conical grinding structure 102, the conical grinding structure 102 is arranged at the top of the flat grinding structure 101, the flat grinding structure 101 includes a first grinding body 120 and a plurality of first grinding ribs 130 arranged at intervals on the outer periphery of the first grinding body 120, the conical grinding structure 102 includes a second grinding body 150 and a first introduction tooth groove 151 and a first grinding tooth groove 152 arranged on the outer side wall of the second grinding body 150 from top to bottom, the second grinding body 150 is arranged at the top of the first grinding body 120, a plurality of grinding knives 210 are all arranged at the top of the second grinding body 150, and the protrusion 110 is arranged at the center position of the top of the second grinding body 150.

[0055] The inner wall of the grinding body 20 is provided with a second introduction tooth groove 22 and a second grinding tooth groove 23 in sequence from top to bottom. An introduction and crushing channel is formed between the first introduction tooth groove 151 and the second introduction tooth groove 22, and a grinding and crushing channel is formed between the first grinding tooth groove 152 and the second grinding tooth groove 23. The introduction and crushing channel is used for coarse grinding and introducing materials, and the grinding and crushing channel is used for further fine grinding of materials. The bottom wall of the grinding body 20 is provided with a plurality of second grinding ribs 21 at intervals along the circumferential direction, and each second grinding rib 21 is used to cooperate with each first grinding rib 130 to further fine grind the material.

[0056] Specifically, when in use, the grinding structure 10 is driven to rotate relative to the grinding body 20 by an external power source. The material to be ground is first converted from large-volume particles into small-volume particles under the pre-cutting action of multiple grinding knives 210 of the grinding structure 10. The pre-cut material then falls into the introduction and crushing channel between the first introduction tooth groove 151 and the second introduction tooth groove 22, where it is continuously squeezed and crushed, and then moves downward into the grinding and crushing channel between the first grinding tooth groove 152 and the second grinding tooth groove 23 for further fine grinding. When the material falls from the grinding and crushing channel between the first grinding rib 130 and the second grinding rib 21, the first grinding ribs 130 of the first grinding member 100 will cooperate with the corresponding second grinding ribs 21 of the grinding body 20 to further finely grind the pre-cut material to form powder.

[0057] It should be noted that when the grinding structure 10 does not have a flat grinding structure 101 provided with a first grinding rib 130, the grinding body 20 does not need to be provided with a corresponding second grinding rib 21; when the grinding structure 10 does not have a conical grinding structure 102 provided with a first introduction tooth groove 151 and a first grinding tooth groove 152, the grinding body 20 does not need to be provided with a corresponding second introduction tooth groove 22 and a second grinding tooth groove 23.

[0058] like Figure 5 As shown, in an optional embodiment, the inner side wall of the grinding body 20 is provided with a plurality of third introduction tooth grooves 26 at intervals along the circumferential direction, and the third introduction tooth grooves 26 are used to guide the material to be ground into between the grinding structure 10 and the grinding body 20. The shape of the third introduction tooth grooves 26 can be rectangular, and the third introduction tooth grooves 26 extend in a direction parallel to the axial direction of the grinding body 20. Optionally, the third introduction tooth grooves 26 extend from one end of the grinding body 20 to the other end of the grinding body 20.

[0059] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A grinding structure, characterized in that: include: A first grinding member and a second grinding member, wherein the first grinding member comprises at least one of a flat grinding structure and a conical grinding structure, and the second grinding member comprises a plurality of grinding knives, and the plurality of grinding knives are all disposed on the first grinding member.

2. The grinding structure according to claim 1, characterized in that: The grinding blade is inclined from the top end of the grinding blade to the bottom end of the grinding blade toward the axis direction close to the first grinding member.

3. The grinding structure according to claim 2, characterized in that: The inclination angle of the grinding knife is 10 to 85 degrees.

4. The grinding structure according to claim 1, characterized in that: The plurality of grinding knives are evenly distributed in an array with the axis of the first grinding member as the center.

5. The grinding structure according to claim 2, characterized in that: A convex portion is arranged at the top end of the first grinding member, the convex portion is located in the axial direction of the first grinding member, and a plurality of grinding blades are arranged at intervals on the outer periphery of the convex portion.

6. The grinding structure according to claim 1, characterized in that: The grinding knife is provided with a grinding groove.

7. The grinding structure according to claim 1, characterized in that: The first grinding member includes the flat grinding structure, which includes a first grinding body and a plurality of first grinding ribs spaced apart on the outer periphery of the first grinding body, and the plurality of grinding blades are all disposed on the top of the first grinding body.

8. The grinding structure according to claim 1, characterized in that: The first grinding member includes the conical grinding structure, which includes a second grinding body and a first introduction tooth groove and a first grinding tooth groove arranged on the outer side wall of the second grinding body from top to bottom, and the plurality of grinding knives are all arranged on the top of the second grinding body.

9. The grinding structure according to claim 1, characterized in that: The first grinding member includes the flat grinding structure and the conical grinding structure, the conical grinding structure is arranged at the top of the flat grinding structure, the flat grinding structure includes a first grinding body and a plurality of first grinding ribs arranged at intervals on the outer periphery of the first grinding body, the conical grinding structure includes a second grinding body and a first introduction tooth groove and a first grinding tooth groove arranged on the outer side wall of the second grinding body in sequence from top to bottom, the second grinding body is arranged at the top of the first grinding body, and the plurality of grinding knives are all arranged at the top of the second grinding body.

10. A grinding assembly, characterized in that: include: A grinding body and a grinding structure as claimed in any one of claims 1 to 9, wherein the grinding body is a hollow structure, and the grinding structure is arranged in the grinding body.

11. The grinding assembly according to claim 10, characterized in that: The inner side wall of the grinding body is provided with a second introduction tooth groove and a second grinding tooth groove in sequence from top to bottom.

12. The grinding assembly according to claim 10, characterized in that: The bottom wall of the grinding body is provided with a plurality of second grinding ribs at intervals along the circumferential direction.

13. The grinding assembly according to claim 10, characterized in that: The inner side wall of the grinding body is provided with a plurality of third introduction tooth grooves at intervals along the circumferential direction.

14. The grinding assembly according to claim 10, characterized in that: The maximum rotation diameter of the grinding knife is smaller than the diameter of the smallest inner hole of the grinding body.

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