Grinding core fixing nut cover, grinding core fixing assembly and bean grinder adopting nut cover

Abstract

The utility model discloses a grinding core fixing nut cover which comprises a nut cover body and a nut cover anti-loosening structure, the nut cover body is connected with the nut cover anti-loosening structure in an extending mode, a nut containing cavity groove is formed in the nut cover, and the nut containing cavity groove is used for being matched with a nut body for fixing a grinding core for limiting and containing. The nut cover anti-loosening structure is used for preventing the nut cover body connected with the nut cover anti-loosening structure from being separated outwards in the axial direction of the body. The grinding core fixing nut cover is used for fixing the nut to prevent the nut from loosening, the shape of the nut containing cavity groove is matched with that of the nut, and other positions outside the grinding core fixing nut cover are fixed with the grinding core pressing block and cannot rotate and loosen. The nut can be effectively prevented from loosening when the bean grinder grinds beans, the nut can be effectively fixed, and the stability, reliability and effectiveness of bean grinding work are improved.

Description

Technical Field

[0001] The utility model relates to a bean grinder, in particular to a grinding core fixing nut cover used in the bean grinder, a grinding core fixing component and the bean grinder adopting the nut cover. Background Art

[0002] With the improvement and pursuit of people's quality of life, as well as concerns about the health and safety of ready-made powdered food products purchased in the market, people are more and more inclined to make and grind coffee, bean powder and other healthy foods by themselves; and in order to grind coffee beans, bean foods or other foods into powder so that they can be further brewed or made for consumption, a bean grinder (or mill, grinder) is needed to grind them into powder. The effect of grinding into powder can be achieved through a bean grinder, but due to factors such as different preferences for powder coarseness among different consumer groups, there is also a need for grinding adjustment to grind into powders of different coarseness and fineness; when adjusting the grinding coarseness and fineness requirements, the bean grinder usually achieves the grinding coarseness and fineness by adjusting the gap between the grinding core and the grinding disc, with the finest grinding gear as the starting gear. In the actual production process, the accumulated manufacturing tolerances of multiple parts will cause deviations in the finest grinding gear of each machine. For this reason, a nut fine-tuning structure can be used to control the fineness of the finest gear of each grinder to meet the standard requirements. However, the nut structure used for fine-tuning the existing grinder is a conventional nut structure, which has the hidden danger of the grinding core fixing nut loosening when grinding beans, thereby affecting the control of grinding fineness and reducing the control of grinding quality.

[0003] The authorized patent number ZL202320561612.2, which was announced on October 3, 2023, discloses a grinding system and a coffee bean grinder. The grinding system includes: a housing, in which a cutter disc is fixed; a transmission shaft, which is arranged in the housing and passes through the opposite sides of the housing, and the transmission shaft is fixed with a conical cutter that cooperates with the cutter disc for grinding; an adjustment assembly, which includes an operating member exposed to the housing and a driving member located in the housing and connected to the operating member, and the operating member can be used to drive the driving member to move; a driven member, which is arranged on the transmission shaft and can be pushed by the driving member when the driving member is actuated, so as to drive the transmission shaft and the conical cutter to move along the axial direction of the transmission shaft, so as to change the spacing between the cutter disc and the conical cutter. The present application has a simple and compact structure. The cutter disc is fixed to the housing and the conical cutter is fixed to the transmission shaft, and then the driving member is driven to move by the operating member. Under the action of the driving member, the driven member drives the transmission shaft and the conical cutter to move relative to the cutter disc, so as to achieve the purpose of adjusting the gap between the conical cutter and the cutter disc. This solution also adopts a conventional nut structure, which has the defect problem caused by the above-mentioned risk of loosening. Utility Model Content

[0004] The utility model aims to solve the hidden danger of loosening of the grinding core fixing nut of the existing bean grinder when grinding beans, thereby affecting the grinding fineness and reducing the grinding quality control problem. The utility model provides a grinding core fixing nut cover, a grinding core fixing component and a bean grinder using the nut cover, which can effectively prevent the nut from loosening when the bean grinder is grinding beans, effectively fix the nut and improve the stability, reliability and effectiveness of the bean grinding work.

[0005] The specific technical solution adopted by the utility model to solve the above technical problems is: a grinding core fixing nut cover, characterized in that it includes a nut cover body and a nut cover anti-loosening structure, the nut cover body is extended and connected to be provided with a nut cover anti-loosening structure, a nut accommodating cavity groove is provided inside the nut cover, the nut accommodating cavity groove is used to match and position the nut shape of the fixed grinding core, and the nut cover anti-loosening structure is used to prevent the nut cover body connected thereto from detaching outward along the axial direction of the body. In order to prevent the nut from loosening when grinding beans, the grinding core fixing nut cover is used to fix the nut to prevent the nut from loosening, the shape of the nut accommodating cavity groove matches the shape of the nut, and other positions outside the grinding core fixing nut cover are fixed to the grinding core pressing block and cannot rotate and loosen. It can effectively prevent the nut from loosening when the grinder is grinding beans, and can effectively fix the nut, thereby improving the stability, reliability and effectiveness of the grinding work.

[0006] Preferably, the nut cover anti-loosening structure adopts a plurality of anti-loosening hook bodies, the front end of the anti-loosening hook body has a locking hook head, and the plurality of anti-loosening hook bodies extend from the opening end of the nut accommodating cavity groove toward the direction away from the opening end of the cavity groove, forming a nut cover anti-loosening structure that prevents the nut cover body connected thereto from detaching axially outward from the body through the locking hooks of the plurality of anti-loosening hook bodies.

[0007] Preferably, the nut cover anti-loosening structure adopts a plurality of anti-loosening buckle slots, and the nut cover body is extended and connected with a plurality of anti-loosening split bodies, and the anti-loosening buckle slots are distributed on the anti-loosening split bodies; a nut cover anti-loosening structure is formed by using the plurality of anti-loosening buckle slots to prevent the nut cover body connected thereto from detaching axially outward from the body.

[0008] Preferably, the number of the plurality of anti-loosening hooks is 2, 3 or 4, and the nut cover body is extended and connected with 2, 3 or 4 anti-loosening hooks, and the 2, 3 or 4 anti-loosening hooks are evenly distributed along the opening end of the hexagonal cavity groove to form an adjacent 180 degree, 120 degree or 90 degree arrangement distribution structure. The anti-loosening hooks are made more uniform, simple, stable, reliable and effective in achieving the anti-loosening locking of the nut cover body.

[0009] Preferably, the hook structure of the plurality of anti-loosening hook bodies comprises a connecting arm and a locking hook head, the inner end of the connecting arm is connected to the open end of the nut accommodating cavity, the outer end of the connecting arm is extended and connected with the locking hook head, the locking hook head is extended and connected to the outer side surface of the outer end of the connecting arm, and the barb end face of the locking hook head faces the direction of the open end of the nut accommodating cavity. The barb locking force of the anti-loosening hook body is improved to be uniform, simple, stable, reliable and effective when the nut cover body is locked to prevent the hook from being detached.

[0010] Preferably, the barb end face of the locking hook head, the upper end face of the hexagonal cavity opening, and the outer side face of the connecting arm together form a side locking groove opening outward from the outer side face of the connecting arm; the length dimension of the side locking groove on the connecting arm is 85-95% of the length dimension of the nut cover body in the same direction, thereby improving the uniformity, simplicity, stability, reliability and effectiveness of the barb locking force of the anti-loosening hook body when realizing the anti-loosening locking of the nut cover body.

[0011] Another invention object of the present invention is to provide a grinding core fixing assembly, characterized in that it includes a grinding core pressing block, a nut and a grinding core fixing nut cover as described in one of the above technical solutions, the nut is used to be accommodated in a nut accommodating cavity provided in the grinding core fixing nut cover and is tightly connected to the threaded section at the bottom end of the rotating shaft of the grinder and fixes the grinding core, a nut cover accommodating cavity is provided in the grinding core pressing block, the nut cover accommodating cavity has an anti-loosening locking structure that matches the nut cover anti-loosening structure of the grinding core fixing nut cover, the nut cover anti-loosening structure and the anti-loosening locking structure are mutually locked and connected together, so as to realize the mutual locking connection between the grinding core fixing nut cover and the grinding core pressing block. The grinding core fixing nut cover is used to fix the nut to prevent the nut from loosening, and the shape of the nut accommodating cavity matches the shape of the nut, and other positions outside the grinding core fixing nut cover are fixed to the grinding core pressing block and cannot rotate and loosen. The grinding core pressing block further restricts the nut cover itself from being locked and not disengaged through the nut cover accommodating cavity, which can effectively prevent the nut from loosening when the grinder is grinding beans, and can effectively fix the nut, thereby improving the stability, reliability and effectiveness of the grinding work.

[0012] Preferably, the grinding core pressing block has a grinding core outer locking wall body matched with the side locking groove of the anti-loosening hook body, the outer side of the anti-loosening hook body has a side locking groove, the grinding core outer locking wall body is embedded in the side locking groove, and the top surface of the grinding core outer locking wall body is in top contact with the barb end surface of the locking hook head of the anti-loosening hook body; the inner partition top wall of the nut cover accommodating cavity groove is provided with a through hole, and the anti-loosening hook body of the grinding core fixing nut cover passes upward through the through hole and is hooked and locked with the outer end surface of the grinding core pressing block. The locking and anti-loosening between the grinding core pressing block and the grinding core fixing nut cover is simple, safe, reliable and effective.

[0013] Preferably, the inner wall of the nut cover accommodating cavity of the grinding core pressing block has a pressing block protruding locking lip matched with the anti-loosening buckle slot, and when the grinding core fixing nut cover is accommodated in the nut cover accommodating cavity, the pressing block protruding locking lip and the anti-loosening buckle slot are mutually buckled and locked together, thereby improving the locking and anti-loosening simplicity, safety, reliability and effectiveness between the grinding core pressing block and the grinding core fixing nut cover.

[0014] Another invention purpose of the present invention is to provide a bean grinder, including a main unit assembly, a grinding core assembly and a powder bin assembly, characterized in that: the grinding core assembly adopts the grinding core fixing nut cover and the grinding core fixing assembly described in one of the above technical solutions. The grinding core fixing nut cover is used to fix the hexagonal nut to prevent the hexagonal nut from loosening when grinding beans. The inner hole of the grinding core fixing nut cover is hexagonal in shape to match the hexagonal nut, and other positions outside the grinding core fixing nut cover are locked and fixed with the grinding core pressing block and cannot rotate and loosen. It can effectively prevent the nut from loosening when the bean grinder is grinding beans, and can effectively fix the nut, thereby improving the stability, reliability and effectiveness of the bean grinder in grinding beans.

[0015] The beneficial effects of the utility model are as follows: in order to prevent the nut from loosening when grinding beans, the grinding core fixing nut cover is used to fix the nut to prevent the nut from loosening, the shape of the nut accommodating cavity matches the shape of the nut, and other positions outside the grinding core fixing nut cover are fixed to the grinding core pressing block and cannot rotate and loosen. It can effectively prevent the nut from loosening when the grinder is grinding beans, effectively fix the nut, and improve the stability, reliability and effectiveness of the grinding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a structural schematic diagram of a grinding core fixing nut cover of the utility model.

[0018] Figure 2 The utility model is a cross-sectional structural diagram of a grinding core fixing nut cover.

[0019] Figure 3 The utility model is a structural schematic diagram of a grinding core fixing nut cover and a grinding core fixing component when they are applied and used.

[0020] Figure 4 yes Figure 3 Schematic diagram of the exploded structure of the components.

[0021] Figure 5 The utility model discloses a grinding core fixing nut cover, a grinding core fixing component and a coffee grinder using the nut cover

[0022] Schematic diagram of the exploded structure of the main unit assembly, grinding core assembly and bean silo assembly.

[0023] Figure 6 The utility model discloses a grinding core fixing nut cover, a grinding core fixing component and a grinding bean adopting the nut cover.

[0024] Schematic diagram of the distribution structure of the main machine component, grinding core component and bean bin component in the machine.

[0025] Figure 7 It is another structural schematic diagram of the grinding core fixing nut cover of the utility model.

[0026] Figure 8 The utility model is a structural schematic diagram of another grinding core fixing nut cover and a grinding core fixing component when they are applied and used.

[0027] Fig. 9 yes Figure 8 AA section view of the structure. DETAILED DESCRIPTION

[0028] Embodiment 1:

[0029] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 In the embodiment shown, a grinding core fixing nut cover 10 includes a nut cover body 11 and a nut cover anti-loosening hook body 12. The nut cover body 11 is extended and connected with a plurality of anti-loosening hook bodies 12. The nut cover body 11 is provided with a hexagonal receiving cavity 16 inside. The hexagonal receiving cavity 16 is used to fix the grinding core 30 (see Figure 3 , Figure 4 , Figure 5 ) nut 20 (see Figure 3 , Figure 4 , Figure 5) The outer hexagonal body cooperates to position and accommodate, and a plurality of anti-loosening hook bodies 12 extend from the opening end of the inner hexagonal cavity 16 in a direction away from the opening end of the cavity, forming an anti-loosening locking structure that prevents the nut cover body 11 connected thereto from detaching outward along the axial direction of the body through a plurality of anti-loosening hook bodies 12. The nut cover body 11 and the nut cover anti-loosening hook body 12 are an integral one-piece connection structure. The number of the plurality of anti-loosening hook bodies 12 is 2 or 3, and the nut cover body is extended and connected with 2 or 3 anti-loosening hook bodies, and the 2 anti-loosening hook bodies are evenly distributed along the opening end of the inner hexagonal cavity to form an adjacent 180-degree arrangement distribution structure, and the 3 anti-loosening hook bodies are evenly distributed along the opening end of the inner hexagonal cavity to form an adjacent 120-degree arrangement distribution structure. The hook structure of several anti-loosening hook bodies 12 includes a connecting arm 13 and a locking hook head 15. The inner end of the connecting arm 13 is connected to the open end of the inner hexagonal cavity 16. The outer end of the connecting arm 13 is extended and connected with the locking hook head 15. The locking hook head 15 is extended and connected to the outer side surface of the outer end of the connecting arm 13, and the barb end face 14 of the locking hook head 15 faces the direction of the open end of the inner hexagonal cavity. The barb end face 14 of the locking hook head 15, the upper end face of the opening of the inner hexagonal cavity and the outer side face of the connecting arm 13 together form a side locking groove 17 that opens outward from the outer side of the connecting arm. Improve the barb locking force uniformity, simplicity, stability, reliability and effectiveness of the anti-loosening hook body when realizing the anti-unhooking locking of the nut cover body. The length dimension L1 of the side locking groove 17 on the connecting arm is 85-95% of the same direction length dimension L2 of the nut cover body. The overall length dimension L3 of the locking hook head is 100-120% of the length dimension L2 of the nut cover body in the same direction, which improves the uniform force of the anti-loosening hook body in realizing the anti-unhooking locking of the nut cover body. Of course, the groove shape of the hexagonal recess 16 is not limited to the hexagonal recess of the shape listed by the applicant, and can also be a pentagonal recess, a quadrangular recess or other shape recess that matches a 5-corner nut or a 4-corner nut or other shape of nut.

[0030] Embodiment 2:

[0031] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 In the embodiment shown, a grinding core fixing assembly includes a grinding core pressing block 30, a hexagonal nut 20 and a grinding core fixing nut cover 10 described in Example 1. The hexagonal nut 20 is used to be accommodated in the inner hexagonal receiving cavity 16 of the grinding core fixing nut cover and is connected to the bottom threaded section 41 of the rotating shaft 40 of the grinder (see Figure 3 , Figure 4 , Figure 5 ) fastening connection, grinding core block 30 (see Figure 3, Figure 4 ) is provided with a nut cover accommodating cavity 31, and a through hole 33 is provided in the cavity partition top wall 32 of the nut cover accommodating cavity. The anti-loosening hook body 12 of the grinding core fixing nut cover 10 passes upward through the through hole 33 and is hooked and locked with the outer top end surface of the grinding core pressing block 30 (see Figure 3 ), the grinding core pressing block 30 has a grinding core outer locking wall 35 that cooperates with the side locking groove of the anti-loosening hook body 12, the grinding core outer locking wall 35 is embedded in the side locking groove 17, and the top end surface of the grinding core outer locking wall 35 is in contact with the barb end surface 14 of the locking hook head of the anti-loosening hook body 12. The grinding core pressing block 30 includes an outer pressing cover portion 38, a nut cover accommodating cavity 31, a cavity inner partition top wall 32, a through hole 33, a grinding core outer locking wall 35, a grinding shaft through hole 34 and a grinding shaft outer protective ring wall 36. The outer pressing cover portion 38 is used to press the bottom end of the grinding core 50 upward from the bottom, and the nut cover accommodating cavity 31 and its cavity inner partition top wall 32 and the through hole 33 are used to accommodate the grinding core fixing nut cover 10 and enable the anti-loosening hook body 12 of the grinding core fixing nut cover 10 to pass through the through hole 32 upward, and the barb end surface 14 of the anti-loosening hook body 12 is engaged. At the same time as the top end of the grinding core pressing block 30 is hooked and locked, the grinding core outer locking wall 35 cooperates with the side locking groove 17 of the anti-loosening hook body 12 to be laterally embedded and locked together, the outer wall surface of the grinding core outer locking wall 35 is pressed against the inner wall surface of the grinding core 50, and the outer circumference of the grinding shaft through-hole 34 is upwardly extended to be provided with a vertical grinding shaft outer protective ring wall 36, and the bottom end of the grinder grinding shaft 40 passes downward through the grinding shaft through-hole 34 and is threadedly connected and fixed with the hexagonal nut 20 in the inner hexagonal cavity 16 of the grinding core fixing nut cover 10 (see Figure 3 , Figure 4 ). The outer wall of the grinding core pressing block 30 upward from the outer pressure cover portion 38 thereof has a first-stage stepped outer wall structure 37 that is folded and reduced toward the central axis of the grinding shaft, forming a first-stage stepped outer wall structure that is pressed upward. Of course, the nut shape of the above-mentioned hexagonal nut 20 is not limited to a hexagonal nut, and may also be a 5-corner nut or a 4-corner nut or a nut of other shapes, and the rest is the same as in the first embodiment.

[0032] Embodiment 3:

[0033] Figure 6 , Figure 7 , Figure 8In the illustrated embodiment, the grinding core fixing nut cover 10A comprises an A nut cover body 11A and a plurality of anti-loosening buckle slots 13A. The nut cover anti-loosening structure adopts a plurality of anti-loosening buckle slots 13A. The nut cover body 11A is extended and connected with a plurality of anti-loosening split bodies 12A. The anti-loosening buckle slots 13A are distributed on the anti-loosening split bodies. The anti-loosening buckle slots 13A are provided on all or part of the anti-loosening split bodies 12A. A nut cover anti-loosening structure is formed by preventing the nut cover body connected thereto from being detached outward along the axial direction of the body through the plurality of anti-loosening buckle slots 13A. The internal cavity space enclosed by the A nut cover body 11A and the plurality of anti-loosening split bodies 12A extended and connected thereto is the A nut cover accommodating cavity 14A.

[0034] Embodiment 4:

[0035] Figure 6 , Figure 7 , Figure 8 In the embodiment shown, the inner wall of the A nut cover accommodating cavity of the A grinding core pressing block 30A has a pressing block protruding locking lip 31A that matches the anti-loosening buckle slot 13A. When the grinding core fixing nut 20 cover is accommodated in the A nut cover accommodating cavity 14A, the pressing block protruding locking lip 31A and the anti-loosening buckle slot 13A are mutually buckled and locked together. The rest is the same as in the second embodiment.

[0036] Embodiment 5:

[0037] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 In the embodiment shown, a bean grinder includes a main assembly 60, a grinding core assembly 80 and a powder bin assembly 70. The grinding core assembly 80 adopts the grinding core fixing nut cover described in Example 1 and the grinding core fixing assembly described in Example 2. The mutual installation positions and installation connection relationships of the grinding core 50, the grinding disc 58 and the grinding disc seat 57, the adjustment ring 51, the bean bin 52, the grinding shaft spring 53, the lower shaft sleeve 54 and the upper shaft sleeve 55, and the upper shaft sleeve top retaining ring 56 can adopt the installation positions and installation connection relationships shown in the prior art and drawings. Similarly, the mutual installation positions and installation connection relationships of the main assembly 60, the grinding core assembly 80 and the powder bin assembly 70 can also adopt the installation positions and installation connection relationships shown in the prior art and drawings, which will not be described in detail. Others are the same as in Example 1 and Example 2.

[0038] Embodiment 6:

[0039] Figure 5 , Figure 6 , Figure 7 , Figure 8In the embodiment shown, the grinding core assembly 80 adopts the grinding core fixing nut cover described in Embodiment 3 and the grinding core fixing assembly described in Embodiment 4. The rest is the same as Embodiment 3, Embodiment 4 and Embodiment 5.

[0040] Taking Example 1, Example 2, and Example 5 as examples, when in use, the grinding disc is fixed on the grinding disc seat, the grinding disc seat 57 and the adjusting ring 51 are threadedly connected, there is a spring 53 on the top of the grinding core 50 and they pass through the grinding shaft 40 together, the bottom of the grinding core 50 is connected to the grinding core pressing block 30 and is fixed to the grinding shaft 40 with a hexagonal nut 20, and as the hexagonal nut rotates, it can move up and down under the action of the spring, thereby controlling the grinding gap between the grinding core 50 and the grinding disc 58.

[0041] The grinding shaft 40 is a square grinding core block with a square hole inside (see Figure 4 The grinding shaft shown passes through the through hole 34), the outside of which is tightly matched with the grinding core 40 and does not loosen, passes through the square rotating shaft and drives the grinding core 50 to rotate and grind together with the rotating shaft. The grinding core fixing nut cover 10 is assembled on the grinding core pressing block 30 and does not loosen. The inner hole is an inner hexagonal cavity groove structure hole that matches the hexagonal nut 20, which is used to fix the hexagonal nut 20 to prevent loosening and rotate with the grinding core 50.

[0042] The adaptability of use of Example 3, Example 4, and Example 6 as examples refers to the above use and will not be described in detail.

[0043] In the description of positional relationships in the present invention, terms such as "inside", "outside", "up", "down", "left", "right", "top", "bottom", "front", "back", etc. that indicate orientation or positional relationships are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the embodiments and simplifying the description, rather than purely indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] The above content and structure describe the basic principle, main features and advantages of the utility model product, which should be understood by technicians in this industry. The above examples and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which are within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A grinding core fixing nut cover, characterized in that: It includes a nut cover body and a nut cover anti-loosening structure. The nut cover body is extended and connected to provide a nut cover anti-loosening structure. A nut accommodating cavity is opened inside the nut cover. The nut accommodating cavity is used to cooperate with the nut shape of the fixed grinding core. The nut cover anti-loosening structure is used to prevent the nut cover body connected thereto from detaching outward along the axial direction of the body.

2. The grinding core fixing nut cover according to claim 1, characterized in that: The nut cover anti-loosening structure adopts a plurality of anti-loosening hook bodies, the front end of the anti-loosening hook body has a locking hook head, and the plurality of anti-loosening hook bodies extend from the opening end of the nut accommodating cavity groove toward the direction away from the opening end of the cavity groove, forming a nut cover anti-loosening structure that prevents the nut cover body connected to it from detaching outward along the axial direction of the body through the locking hooks of the plurality of anti-loosening hook bodies.

3. The grinding core fixing nut cover according to claim 1, characterized in that: The nut cover anti-loosening structure adopts a plurality of anti-loosening buckle slots, and the nut cover body is extended and connected with a plurality of anti-loosening split bodies, and the anti-loosening buckle slots are distributed on the anti-loosening split bodies; a nut cover anti-loosening structure is formed by preventing the nut cover body connected thereto from being detached outward along the axial direction of the body through the plurality of anti-loosening buckle slots.

4. The grinding core fixing nut cover according to claim 2, characterized in that: The number of the plurality of anti-loosening hooks is 2, 3 or 4, and the nut cover body is extended and connected with 2, 3 or 4 anti-loosening hooks. The 2, 3 or 4 anti-loosening hooks are evenly distributed along the opening end of the hexagonal cavity groove to form an adjacent 180 degree, 120 degree or 90 degree arrangement distribution structure.

5. The grinding core fixing nut cover according to claim 2, characterized in that: The hook body structure of the several anti-loosening hook bodies includes a connecting arm and a locking hook head. The inner end of the connecting arm is connected to the opening end of the nut accommodating cavity groove, and the outer end of the connecting arm is extended and connected with the locking hook head. The locking hook head extends and is connected to the outer side surface of the outer end of the connecting arm, and the barbed end face of the locking hook head faces the direction of the opening end of the nut accommodating cavity groove.

6. The grinding core fixing nut cover according to claim 5, characterized in that: The barbed end face of the locking hook head, the upper end face of the hexagonal cavity opening and the outer side face of the connecting arm together constitute a side locking groove opening outward from the outer side face of the connecting arm; the length dimension of the side locking groove on the connecting arm is 85-95% of the same direction length dimension of the nut cover body.

7. A grinding core fixing assembly, characterized in that: It comprises a grinding core pressing block, a nut and a grinding core fixing nut cover as claimed in any one of claims 1 to 6, wherein the nut is used to be accommodated in a nut accommodating cavity provided in the grinding core fixing nut cover and is tightly connected to the threaded section at the bottom end of the rotating shaft of the grinder and fixes the grinding core, a nut cover accommodating cavity is provided in the grinding core pressing block, the nut cover accommodating cavity has an anti-loosening locking structure matched with the nut cover anti-loosening structure of the grinding core fixing nut cover, the nut cover anti-loosening structure and the anti-loosening locking structure are mutually locked and connected together, so as to realize the mutual locking connection between the grinding core fixing nut cover and the grinding core pressing block.

8. The grinding core fixing assembly according to claim 7, characterized in that: The grinding core pressing block has a grinding core outer locking wall body that cooperates with the side locking groove of the anti-loosening hook body, the outer side surface of the anti-loosening hook body has a side locking groove, the grinding core outer locking wall body is embedded in the side locking groove, and the top end surface of the grinding core outer locking wall body is in top contact with the barb end surface of the locking hook head of the anti-loosening hook body; a through hole is opened in the top partition wall of the cavity of the nut cover accommodating cavity, and the anti-loosening hook body of the grinding core fixing nut cover passes through the through hole upward and is hooked and locked with the outer end surface of the grinding core pressing block.

9. The grinding core fixing assembly according to claim 7, characterized in that: The inner wall of the nut cover accommodating cavity of the grinding core pressing block has a pressing block protruding locking lip that matches the anti-loosening buckle slot hole. When the grinding core fixing nut cover is accommodated in the nut cover accommodating cavity, the pressing block protruding locking lip and the anti-loosening buckle slot hole are pressed and locked together.

10. A coffee bean grinder, comprising a main unit assembly, a grinding core assembly and a powder bin assembly, characterized in that: The grinding core assembly adopts the grinding core fixing nut cover described in any one of claims 1 to 6 and the grinding core fixing assembly described in any one of claims 7 to 9.

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