A reliable structure of a flour mill

Abstract

The application relates to the technical field of crushing devices, and discloses a reliable structure flour mill, which comprises a main machine, a cup body assembly, a soundproof cover arranged outside the cup body assembly, a motor arranged in the main machine, a safety switch for controlling start and stop of the motor, the safety switch being triggered through the soundproof cover, the cup body assembly comprising a first cup body and a second cup body which are replaceably arranged above the main machine, the first cup body being internally provided with a first dry grinding knife which is driven to rotate by the motor, the bottom of the second cup body being provided with a second cup seat, the second cup body being arranged on the main machine through the second cup seat, the second cup seat being capable of being sleeved in the first cup body when the flour mill is in a storage state, the first dry grinding knife rotating to form a cutting space, and the second cup seat avoiding the cutting space. The application avoids the phenomenon of food material flavoring failure and waste, realizes reasonable storage of the flour mill in an idle state, saves the occupied space of the flour mill, reduces the loss caused by misrotation of the first dry grinding knife, and is more reliable in use and higher in safety.

Description

Technical Field

[0001] This invention relates to the field of pulverizing equipment technology, and specifically to a mill with a reliable structure. Background Technology

[0002] As people's living standards improve, their demand for food preparation is increasing. Grinding machines can not only grind medicinal materials but also soybeans and dried chili peppers to produce various food powders such as soybean powder and chili powder, and are therefore becoming more and more popular with users.

[0003] Existing grinding mills, such as the Chinese patent with publication number CN210411014U, disclose a grinding mill that includes a machine body, a motor fixed inside the machine body, a cup body assembled into the machine body and forming a detachable and fixed connection, and a grinding blade assembly disposed at the bottom of the cup body. The grinding mill also includes a soundproof cover that covers the open end of the machine body and completely encloses the cup body therein, and the soundproof cover is detachably connected to the machine body. After the soundproof cover is rotated to be fixed to the machine body, it triggers an interlocking linkage safety switch to achieve interlocking, thereby protecting user safety.

[0004] Because this grinder has only one container and is primarily used for grinding medicinal herbs, the strong odor of these herbs can linger in the container after use. This residual odor is difficult to remove and can cause severe cross-contamination of flavors with the next batch of materials being ground. This is especially problematic when the user intends to prepare food powders, potentially rendering the ground material inedible and resulting in waste. Some users may try to find other containers to match the same main unit to solve this problem, or purchase multiple grinders for different applications. However, this increases operating costs and makes it difficult to store multiple grinders and containers efficiently, resulting in significant space consumption.

[0005] In addition, existing grinding mills require a soundproof cover and a safety switch to work together when performing dry grinding. Specifically, the user manually presses down the soundproof cover to trigger the safety switch inside the main unit, which then starts the motor inside the main unit and drives the dry grinding blades in the cup to rotate.

[0006] Since no one has proposed incorporating multiple cups into a single grinding mill, and there are currently no grinding mills on the market with multiple cups, the inventors initially conceived of designing a grinding mill containing multiple cups that could be interchanged and used together on a single main unit, thus solving the problem of cross-contamination of flavors during grinding. However, further research revealed that multiple cups would occupy a significant amount of space when stored. Therefore, the inventors investigated how to achieve nested storage of multiple cups. Further research showed that if multiple cups were stacked, the soundproof cover would typically remain on the main unit. Therefore, if the user forgot to unplug the power cord and accidentally pressed down on the soundproof cover, or if the grinding mill tilted, the safety switch could be accidentally triggered. This triggering of the safety switch could cause the dry grinding blade to rotate unnecessarily, potentially damaging the nested cups and the dry grinding blade, resulting in machine damage, inconvenience for the user, and unnecessary economic losses. Therefore, the inventors overcame numerous difficulties and developed a new type of grinding mill. Summary of the Invention

[0007] The purpose of this invention is to provide a reliable grinding mill that can prevent the pulverized materials from absorbing odors and solve the problems of machine damage caused by accidental triggering of the safety switch and inconvenient storage of the grinding mill while avoiding cross-contamination of the pulverized materials.

[0008] To achieve the above objectives, the present invention provides a reliable grinding mill, including a main unit, a cup assembly, and a soundproof cover covering the cup assembly. The main unit is equipped with a motor and a safety switch for controlling the start and stop of the motor. The safety switch is triggered through the soundproof cover. The cup assembly includes a first cup and a second cup that can be replaced and installed on top of the main unit. The first cup is equipped with a first dry grinding blade driven to rotate by the motor. The bottom of the second cup is equipped with a second cup seat. The second cup is installed on the main unit through the second cup seat. When the grinding mill is in the storage state, the second cup seat can be fitted into the first cup. The first dry grinding blade rotates to form a cutting space, and the second cup seat avoids the cutting space.

[0009] The reliable grinding mill provided by this invention features a first and second cup body, which can be interchangeably installed on top of the main unit. This allows for the selection of different cup bodies for grinding different materials, reducing the risk of cross-contamination of flavors and preventing preparation failures and waste. Furthermore, users can temporarily store materials in either the first or second cup body after grinding, eliminating the need to switch cups for subsequent grinding, resulting in a better user experience. The bottom of the second cup body has a second cup holder for positioning and engaging with the main unit. This ensures stable engagement with the main unit, reduces shaking during grinding, minimizes noise from each cup component, and facilitates the installation of a second dry grinding blade within the second cup body. This ensures a one-to-one correspondence between the dry grinding blade and the cup body, eliminating the need for separate dry grinding blade installation after the second cup body is in place, making operation more convenient, labor-saving, and safer. The second cup holder can be fitted inside the first cup body, allowing for efficient storage of the grinding mill when not in use and saving space. Furthermore, the first dry grinding blade rotates to create a cutting space, which the second cup holder avoids when fitted. Therefore, even if the safety switch is accidentally triggered due to user error, the first dry grinding blade and the second cup holder will avoid each other, preventing damage to the second cup holder and avoiding trouble for the user. This reduces losses caused by the accidental rotation of the first dry grinding blade and ensures the service life of all parts of the grinder, making it more reliable and safer to use.

[0010] Preferably, the second cup holder includes a main body fixed to the bottom wall of the second cup body, a second dry sharpening blade is provided inside the second cup body, the blade shaft of the second dry sharpening blade passes through the main body, and a connector is provided below the second dry sharpening blade, the connector avoiding the cutting space.

[0011] The second cup holder achieves a reliable connection between the main body and the bottom wall of the second cup body, thus securing the second dry sharpening blade. The second cup body has its own independent second dry sharpening blade; once the second cup body is installed, the user does not need to install the dry sharpening blade separately, making installation more convenient, effortless, and safer. The second dry sharpening blade is connected to the motor via a connector. Because the connector protrudes downwards relative to the main body, in the assembled state, if the safety switch is accidentally triggered, the first dry sharpening blade may push the connector to rotate or cut the connector. Therefore, the connector avoids any cutting space, protecting it, extending its lifespan, and further reducing damage caused by accidental rotation of the first dry sharpening blade.

[0012] Preferably, the first dry grinding tool includes an upwardly extending upper blade, the vertical projection of the connector and the upper blade overlaps, the upper blade extends upward from a position below the connector, and there is a vertical gap L1 between the part of the upper blade directly below the connector and the bottom end of the connector.

[0013] By designing an upper blade with its vertical projection overlapping that of the connector, the vertical height of the cutting space is increased, improving the pulverizing effect of the first dry sharpening blade. Simultaneously, this design saves on the overall height of the first and second cup bodies when assembled, thus conserving floor space. The upper blade extends upwards at an angle from below the connector, with a vertical gap L1 between the part of the upper blade directly opposite the bottom of the connector and the bottom of the connector. This ensures that the connector and the upper blade avoid interference, protecting the connector while maintaining the pulverizing effect of the first dry sharpening blade.

[0014] Preferably, the upper blade is arranged around the outside of the connector.

[0015] The upper blade and the connector overlap to reduce the height and space occupied by the mill after it is stored. By wrapping around the outside of the connector, the crushing area of ​​the upper blade is expanded, thus improving the crushing effect.

[0016] Preferably, the second cup holder includes a main body fixed to the bottom wall of the second cup body and a limiting sidewall extending downward from the edge of the main body to form a recessed cavity with an open bottom. A connector is provided in the recessed cavity, and the first dry grinding tool extends into the recessed cavity. Both the connector and the limiting sidewall avoid the cutting space.

[0017] The second cup holder includes a main body fixed to the bottom wall of the second cup body and a limiting sidewall extending downward from the edge of the main body. The main body reliably connects to the bottom wall of the second cup body, securing the second dry sharpening tool. The limiting sidewall reliably limits the engagement with the main unit, ensuring stability during use and reducing noise. The first dry sharpening tool extends into the recessed cavity, further reducing the stacked height of the first and second cup bodies, saving storage space. Both the connector and the limiting sidewall avoid the cutting space, preventing damage caused by accidental rotation of the first dry sharpening tool.

[0018] Preferably, the first dry sharpening tool includes an upwardly extending upper blade that extends into a recessed cavity.

[0019] The upper blade can expand the pulverizing space in the height direction of the first dry grinding blade, and at the same time, it extends into the concave cavity to save storage space.

[0020] When the grinding mill is in its stored state, there is a gap L2 between the side wall of the second cup body and the side wall of the first cup body, and a gap L3 between the second cup seat and the side wall of the second cup body, wherein L2 < L3.

[0021] On the one hand, L2 < L3 ensures reliable radial limiting between the sidewalls of the second cup and the first cup, thus preventing a large sway of the second cup relative to the first cup in the event of a false triggering of the safety switch and tilting of the mill. This avoids the first dry grinding blade cutting the second cup seat, minimizing losses caused by the false rotation of the first dry grinding blade. On the other hand, L3 > L2 increases the gap between the second cup seat and the sidewalls of the second cup, reducing the size of the second cup seat and lowering the probability of interference between the second cup seat and the first dry grinding blade. Even if the safety switch is falsely triggered, it ensures protection for the second cup seat.

[0022] Preferably, the second cup rests on the rim of the first cup, so that the second cup rest is suspended relative to the bottom wall of the first cup.

[0023] The second cup rests on the rim of the first cup for easy storage. The portion above the rest allows for easy removal of the second cup from the first cup, providing a superior user experience. The second cup rest is suspended above the bottom wall of the first cup, with ample space underneath to avoid obstructing the first dry-sharpening blade. This ensures sufficient cutting space for the first dry-sharpening blade while preventing damage from accidental rotation.

[0024] Preferably, the first dry grinding tool has a lower blade extending below the limiting sidewall of the second cup seat, the rotation diameter of the lower blade is greater than or equal to the outer diameter of the second cup seat, and there is a vertical gap L6 between the portion of the lower blade facing below the limiting sidewall and the bottom end of the limiting sidewall.

[0025] By extending the lower blade to the lower limit sidewall of the second cup holder, the lateral cutting space of the lower blade can be expanded. Combined with the vertical gap L6, this ensures sufficient cutting space for the first dry sharpening tool while preventing damage caused by accidental rotation of the first dry sharpening tool.

[0026] Preferably, the lower blade includes a downwardly extending first bent section and a second bent section extending laterally from the first bent section, the second bent section extending below the limiting sidewall.

[0027] The first and second bending sections expand both the transverse and longitudinal cutting space of the first dry grinding blade, thereby improving the grinding effect.

[0028] Preferably, the second cup holder includes a main body fixed to the bottom wall of the second cup body and a limiting sidewall extending downward from the edge of the main body. The limiting sidewall is supported on the bottom wall of the first cup body, and the first dry grinding blade cover is installed inside the second cup holder.

[0029] The main body is reliably connected to the bottom wall of the second cup body to fix the second dry sharpening blade. The limiting side wall is reliably matched with the main body. At the same time, the limiting side wall serves as a support to support the second cup seat on the bottom wall of the first cup body, further saving storage space and reducing the overall footprint of the machine. The first dry sharpening blade cover is installed inside the second cup seat to minimize the damage caused by the accidental rotation of the first dry sharpening blade. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a grinding mill in one embodiment of the present invention.

[0032] Figure 2 This is a partially enlarged schematic diagram of the grinding mill in its stored state according to one embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of the structure of the second cup holder in one embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the structure of the first dry grinding tool in one embodiment of the present invention.

[0035] Figure 5 This is a three-dimensional structural diagram of the first dry grinding tool in one embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of the avoidance cavity in one embodiment of the present invention.

[0037] Figure 7 This is a schematic diagram illustrating the engagement of the first dry grinding tool and the second cup holder in one embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10-Main unit; 101-Limiting cavity; 20-Cup body assembly; 30-Soundproof cover; 11-Motor; 12-Safety switch; 21-First cup body; 22-Second cup body; 221-Step; 222-Exposed part; 23-Second cup seat; 203-Extension rib; 231-Main body; 232-Limiting side wall; 24-Third cup body; 25-Cup lid; 41-First dry grinding blade; 411-Upper blade; 412-Lower blade; 4121-First bending section; 4122-Second bending section; 42-Second dry grinding blade; 421-Connector. Detailed Implementation

[0040] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0041] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0042] In one embodiment, the present invention provides a reliable grinding mill, including a main unit 10, a cup assembly 20, and a soundproof cover 30 covering the cup assembly 20. The main unit 10 is equipped with a motor 11 and a safety switch 12 that controls the start and stop of the motor 11. The safety switch 12 is triggered by the soundproof cover 30. The cup assembly 20 includes a first cup 21 and a second cup 22 that can be replaced and installed on the main unit 10. The first cup 21 is equipped with a first dry grinding blade 41 that is driven to rotate by a motor. The bottom of the second cup 22 is equipped with a second cup seat 23. The second cup 22 is installed with the main unit through the second cup seat 23. When the grinding mill is in the storage state, the second cup seat 23 can be fitted into the first cup 21. The first dry grinding blade 41 rotates to form a cutting space. The second cup seat 23 avoids the cutting space when fitted.

[0043] It should be noted that the second cup holder 23 can be fitted into the first cup body 21, specifically including: part of the second cup holder 23 sinks into the first cup body 21, and the other part of the second cup holder 23 and the entire second cup body are exposed relative to the first cup body 21, for example, an overlapping part is provided on the outside of the second cup holder 23.

[0044] Alternatively, the second cup holder 23 may be completely submerged in the first cup body 21, while the second cup body 22 may be completely exposed outside the first cup body 21. For example, an overlapping portion may be provided between the second cup holder 23 and the second cup body.

[0045] Alternatively, the second cup holder 23 may be completely submerged in the first cup body 21, and a portion of the second cup body 21 may be fitted into the first cup body 21, with a portion of the second cup body 21 exposed relative to the first cup body 21, for example, by providing an overlapping portion on the side wall of the second cup body 21.

[0046] Alternatively, the second cup holder 23 may be completely submerged in the first cup body 21, and the second cup body 21 may be completely submerged in the first cup body 21.

[0047] In a preferred embodiment of the present invention, such as Figure 1 As shown, when the grinding mill is in the retracted state, the second cup holder 23 is completely submerged in the first cup body 21. The sum of the heights of the second cup body and the second cup holder is H1, and the sum of the heights of the second cup body and the second cup holder submerged in the first cup body is H2, satisfying H2≥0.5H1.

[0048] It can also be understood that the second cup body and the second cup base constitute the second dry grinding cup, the height of the second dry grinding cup is H1, and the height of the second dry grinding cup submerged in the first cup body is H2.

[0049] Specifically, the height of the second cup body and its relationship with the second cup base are not limited. For example, the height of the second cup body can be greater than, equal to or less than the height of the second cup base.

[0050] H2≥0.5H1 ensures that at least half of the second cup assembly is housed within the first cup, thereby further reducing the storage height of the grinder in its stored state and saving storage space.

[0051] Of course, it should be noted that, in other embodiments of the present invention, the overlap height between the second cup assembly and the first cup assembly may be less than half of the second cup assembly.

[0052] In a preferred embodiment of the present invention, when the grinder is in the stored state, the heights of the first dry grinding blade 41 and the second cup holder 23 overlap, thereby further reducing the storage height of the first cup body and the second cup body after being assembled, saving storage space.

[0053] Specifically, the second cup holder includes a main body fixed to the bottom wall of the second cup body and a limiting sidewall extending downward from the edge of the main body to form a concave cavity with an open bottom. A connector is provided in the concave cavity, and the first dry grinding tool extends into the concave cavity. Both the connector and the limiting sidewall avoid the cutting space.

[0054] It should be noted that the presence of a connector in the cavity means that the connector is located inside the limiting sidewall. The limiting sidewall can extend to completely block the connector laterally, or it can partially block the connector.

[0055] Preferably, the first dry sharpening tool includes an upwardly extending upper blade that extends into a recessed cavity.

[0056] Of course, the present invention is not limited to the preferred embodiment described above. In fact, in the assembled state, the heights of the first dry grinding blade 41 and the second cup holder 23 do not overlap. That is, the highest point of the first dry grinding blade 41 is lower than the lowest point of the second cup holder 23, so that the second cup holder 23 avoids the cutting space. Moreover, all blades of the first dry grinding blade 41 (including the upper blade) can have their outer diameter expanded as much as possible, not limited to the second cup holder 23, which is conducive to expanding the crushing distance of the first dry grinding blade 41 in both the longitudinal and transverse directions, and improving the crushing effect and efficiency of the first dry grinding blade 41.

[0057] It should be noted that the first dry sharpening blade 41 and the second cup holder 23 have a high degree of overlap, which means that in the set state, the projections of the first dry sharpening blade 41 and the second cup holder 23 in the vertical plane overlap. This includes the first dry sharpening blade 41 extending into the second cup holder 23 and the blade blade of the first dry sharpening blade extending to the outside of the second cup holder 23 and bending upward at the outer part to form the overlap height.

[0058] This invention does not limit the number of cups included in the cup assembly or the size of the cup capacity. Preferably, as follows: Figure 1 As shown, the cup assembly 20 also includes a third cup 24, which is fitted inside the second cup 22. Of course, more cups can be added to the third cup. It should be noted that, preferably, the different cups can have different capacities, thereby achieving the preparation of different capacities, facilitating cleaning, and avoiding space waste and poor pulverization effects. Figure 1 In the illustrated embodiment, the capacities of the first, second, and third cups decrease sequentially. Of course, the capacities of the three cups can also be set to be equal, or the inner cup can have a larger volume than the outer cup; this can be achieved by increasing the height of the inner cup, thus allowing for flexible selection of the desired capacity. This expands the product's applicability.

[0059] Preferred, such as Figure 1 As shown, the cup body assembly 20 also includes a cup lid 25. Preferably, the outer diameters of the three cup bodies are set to be the same, so that a single cup lid 25 can be shared. This also avoids inconvenience in storage.

[0060] The reliable grinding mill provided by this invention features a first cup 21 and a second cup 22, which can be interchangeably installed above the main unit 10. This allows for the selection of different cups for grinding different materials, reducing the risk of cross-contamination of flavors and preventing preparation failures and waste. Furthermore, users can temporarily store materials in either the first or second cup 21 after grinding, eliminating the need to switch cups for subsequent grinding, resulting in a better user experience. The bottom of the second cup 22 has a second cup seat 23 for positioning and engaging with the main unit 10. This ensures stable engagement with the main unit 10, reduces shaking during grinding, minimizes noise from each cup component 20, and facilitates the installation of a second dry grinding blade 42 within the second cup 22. This ensures a one-to-one correspondence between the dry grinding blade and the cup, eliminating the need for separate dry grinding blade installation after the second cup 22 is in place, making operation more convenient, labor-saving, and safer. The second cup holder 23 can be fitted inside the first cup body 21, allowing for efficient storage of the grinder when not in use and saving space. Furthermore, the first dry grinding blade 41 rotates to create a cutting space, with the second cup holder 23 avoiding contact with this space when fitted. Therefore, even if the safety switch 12 is accidentally triggered due to user error, the first dry grinding blade 41 and the second cup holder 23 will avoid cutting or damaging the second cup holder 23, preventing inconvenience to the user, reducing losses caused by accidental rotation of the first dry grinding blade 41, and ensuring the lifespan of all parts of the grinder, resulting in more reliable operation and improved safety.

[0061] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the second cup holder 23 includes a main body 231 fixed to the bottom wall of the second cup body 22. A second dry grinding blade 42 is provided inside the second cup body 22. The blade shaft of the second dry grinding blade 42 passes through the main body 231. A connector 421 is provided below the second dry grinding blade 42. The second dry grinding blade 42 has a connector 421 that protrudes downward relative to the main body 231. The connector 421 avoids the cutting space.

[0062] The second cup holder 23 achieves a reliable connection between the main body 231 and the bottom wall of the second cup body 22, thus fixing the second dry grinding blade 42. The second cup body 22 has an independent second dry grinding blade 42. After the second cup body 22 is installed in place, the user does not need to install the dry grinding blade separately, making installation more convenient, labor-saving, and safer. The second dry grinding blade 42 is connected to the motor 11 through the connector 421. Since the connector 421 protrudes downward relative to the main body 231, if the safety switch 12 is accidentally triggered in the assembled state, the first dry grinding blade 41 may push the connector 421 to rotate or cut the connector 421. Therefore, the connector 421 avoids the cutting space, which can protect the connector 421, extend the service life of the connector 421, and further reduce the damage caused by the accidental rotation of the first dry grinding blade 41.

[0063] It should be noted that, in the preferred embodiment described above, the second cup holder 23 only includes the main body 231, and its fit with the main unit is achieved by increasing the thickness of the main body 231 or by providing threads on the side of the main body 231. In this embodiment, the heights of the first dry grinding blade 41 and the main body 231 do not overlap, thus achieving avoidance.

[0064] Of course, in another preferred embodiment, the second cup holder 23 includes a limiting sidewall 232 in addition to the main body 231. Specifically, the second cup holder 23 includes a main body 231 fixed to the bottom wall of the second cup body and a limiting sidewall 232 extending downward from the edge of the main body 231 to form a recessed cavity with an open bottom. A connector 421 is provided in the recessed cavity, and the first dry grinding blade 41 extends into the recessed cavity. Both the connector 421 and the limiting sidewall 232 avoid the cutting space.

[0065] More preferably, the first dry sharpening tool 41 includes an upwardly extending upper blade 411 that extends into the recessed cavity. Alternatively, the first dry sharpening tool 41 may also include a laterally extending flat blade, which is positioned within the recessed cavity to achieve a lowering effect.

[0066] Based on the above embodiments, in order to achieve the avoidance of the connector 421 from the cutting space, the following methods can be used. Of course, the following designs of the present invention are not limited to the basis of this embodiment.

[0067] Implementation Example 1, such as Figure 2As shown, the first dry grinding tool 41 includes an upwardly extending upper blade 411. The vertical projection of the connector 421 overlaps with that of the upper blade 411. The upper blade 411 extends upward from a position below the connector 421, and there is a vertical gap L1 between the portion of the upper blade 411 directly below the connector 421 and the bottom end of the connector 421. Specifically, the upper blade 411 can extend upward in an oblique (inclined) manner from bottom to top, or extend upward in a straight line from bottom to top, or extend upward in an arc manner from bottom to top.

[0068] By setting the upper blade 411 so that the vertical projection of the connector 421 overlaps with that of the upper blade 411, the vertical height of the cutting space is expanded, improving the pulverizing effect of the first dry grinding blade 41. At the same time, it saves the overall height of the first cup body 21 and the second cup body 22 after assembly, saving floor space. The upper blade 411 extends obliquely upward from below the connector 421. There is a vertical gap L1 between the part of the upper blade 411 directly below the connector 421 and the bottom end of the connector 421, so that the connector 421 and the upper blade 411 avoid each other and do not interfere with each other, achieving the effect of protecting the connector 421 while ensuring the pulverizing effect of the first dry grinding blade 41.

[0069] More preferably, the upper blade 411 is arranged around the outside of the connector 421.

[0070] The upper blade 411 is arranged around the outside of the connector 421, which can prevent the size of the upper blade 411 from being affected by the size of the connector 421, thereby helping to expand the crushing area of ​​the upper blade 411 and improve the crushing effect.

[0071] Of course, it should be noted that in another preferred embodiment, the outer diameter of the connector 421 can be enlarged, and a groove structure that mates with the motor shaft is formed on the inner side of the connector 421, with the upper blade 411 extending into the groove.

[0072] In Example 2, the lowest point of the connector 421 is higher than the highest point of the first dry grinding tool 41.

[0073] The lowest point of the connector 421 is higher than the highest point of the first dry grinding tool 41, ensuring that the connector 421 and the first dry grinding tool 41 avoid each other and do not interfere with each other, further reducing the losses caused by the mis-rotation of the first dry grinding tool 41.

[0074] like Figure 7 As shown, in a preferred embodiment of the present invention, the overlap height h of the first dry grinding blade 41 and the second cup holder 23 and the height H of the second cup holder 23 satisfy: 0.07≤h / H≤0.5.

[0075] Meeting the requirement of 0.07 ≤ h / H ≤ 0.5 reduces the overall storage height of the set while achieving better obstacle avoidance, minimizing damage caused by accidental rotation of the first dry sharpening tool. If h / H is smaller than 0.07, the storage effect is not ideal, and the overall height of the set is large; if h / H is larger than 0.5, the overlap height is too large, which may require further optimization of the second cup holder to avoid the first dry sharpening tool, hindering proper obstacle avoidance between the second cup holder itself and the first dry sharpening tool.

[0076] Specifically, in a preferred embodiment, the overlap height h = 0.5 cm and H = 3 cm.

[0077] In a preferred embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the first dry grinding blade 41 extends into the second cup holder 23, and the second cup holder 23 is provided with a relief cavity P that avoids the cutting space.

[0078] The first dry sharpening blade 41 extends into the second cup holder 23, thereby further reducing the storage height of the first cup body 21 and the second cup body 22 after assembly, saving storage space. The second cup holder 23 is provided with a clearance cavity to achieve reasonable clearance with the first dry sharpening blade 41.

[0079] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the second cup holder 23 includes a main body 231 fixed to the bottom wall of the second cup body 22 and a limiting sidewall 232 extending downward from the edge of the main body 231. The first dry sharpening blade 41 includes an upwardly extending upper blade 411, which extends to the inner side of the limiting sidewall 232. The main body 231 and the limiting sidewall 232 form a vertical gap L4 and a transverse gap L5 with the tip of the upper blade 411, respectively, to form a clearance cavity P1. It should be noted that in this embodiment, the bottom of the second cup holder 23 has an extending rib 203, and the vertical gap L4 is formed at the bottom end of the extending rib 203 and the tip of the upper blade 411, as shown in the area indicated by P1 in the figure. It can be understood that the clearance cavity P1 is an annular cavity formed when the first dry sharpening blade rotates.

[0080] Of course, in another embodiment, the bottom of the main body 231 is flush and there is no extending rib 203. Therefore, the vertical gap L4 is the gap between the bottom wall of the main body 231 and the tip of the upper blade 411, forming the clearance cavity P2.

[0081] The second cup holder 23 includes a main body 231 fixed to the bottom wall of the second cup body 22 and a limiting sidewall 232 extending downward from the edge of the main body 231. The main body 231 is reliably connected to the bottom wall of the second cup body 22 to fix the second dry grinding blade 42. The limiting sidewall 232 reliably limits the engagement with the main unit 10, ensuring stability during use and reducing noise. Vertical clearance L4 and horizontal clearance L5 ensure reliable clearance between the upper blade 411 and the main body 231 and the limiting sidewall 232, avoiding damage caused by accidental rotation of the first dry grinding blade 41.

[0082] It should be noted that the present invention does not limit the method by which the host 10 limits the cup assembly 20, for example:

[0083] Implementation Example 3, such as Figure 1 and Figure 2 As shown, the main unit 10 is provided with a limiting cavity 101, and each cup assembly is provided with a cup holder, which can be inserted into the limiting cavity.

[0084] Specifically, the limiting cavity can be formed by recessing the top surface of the main unit 10, or by protruding a ring rib on the top surface of the main unit, with the ring rib forming the limiting cavity.

[0085] In Implementation Example 4, a convex hull is provided on the top of the host 10, and multiple convex hulls are arranged at intervals around the axis of the host. Correspondingly, a limiting groove that cooperates with the convex hull is provided in each cup seat of the cup body assembly to achieve limiting.

[0086] It should also be noted that the present invention does not limit the axial positioning method of the second cup body 22 and the first cup body 21 after assembly:

[0087] Implementation Example 5, such as Figure 1 and Figure 2 As shown, the second cup body 22 rests on the rim of the first cup body 21, so that the second cup base 23 is suspended relative to the bottom wall of the first cup body 21.

[0088] Specifically, a step 221 can be formed by bending the side wall of the second cup body 22 outward from bottom to top; or, a supporting boss can be formed by protruding outward from the side wall of the second cup body 22, which is used to support the cup mouth of the first cup body 21. Of course, a lug can also be provided on the side wall of the second cup body 22 to achieve support. Support can also be achieved by setting a flange on the cup mouth of the second cup body 22.

[0089] The second cup body 22 rests on the rim of the first cup body 21 for easy storage. The portion above the resting part facilitates easy removal of the second cup body 22 from the first cup body 21, providing a good user experience. The second cup base 23 is suspended relative to the bottom wall of the first cup body 21, with sufficient space reserved below it to avoid obstructing the first dry sharpening blade 41. This ensures sufficient cutting space for the first dry sharpening blade 41 while preventing damage caused by accidental rotation.

[0090] In this embodiment, preferably, the first dry grinding blade 41 has a lower blade 412 extending below the limiting sidewall 232 of the second cup seat 23. The rotation diameter D1 of the lower blade 412 is greater than or equal to the outer diameter D2 of the second cup seat 23. The portion of the lower blade 412 directly below the limiting sidewall 232 has a vertical gap L6 between it and the bottom end of the limiting sidewall 232.

[0091] By extending the lower blade 412 to below the limiting sidewall 232 of the second cup holder 23, the lateral cutting space of the lower blade 412 can be expanded. Combined with the vertical gap L6, it can ensure that the first dry grinding blade 41 has sufficient cutting space while avoiding damage caused by accidental rotation of the first dry grinding blade 41.

[0092] like Figure 4 , Figure 5 As shown, preferably, the lower blade 412 includes a downwardly extending first bent section 4121 and a second bent section 4122 extending laterally from the first bent section 4121, the second bent section 4122 extending below the limiting sidewall 232.

[0093] The first bending section 4121 and the second bending section 4122 expand the transverse cutting space of the first dry grinding blade 41 on the one hand, and expand the longitudinal cutting space of the first dry grinding blade 41 on the other hand, thereby improving the crushing effect.

[0094] In Example 6, preferably, the second cup holder 23 includes a main body 231 fixed to the bottom wall of the second cup body 22 and a limiting sidewall 232 extending downward from the edge of the main body 231. The limiting sidewall 232 is supported on the bottom wall of the first cup body 21, and the first dry grinding blade 41 is fitted inside the second cup holder 23.

[0095] The main body 231 is reliably connected to the bottom wall of the second cup body 22, thereby fixing the second dry grinding blade 42. The limiting side wall 232 is reliably limited to the main body 10. At the same time, the limiting side wall 232 serves as a support to support the second cup seat 23 on the bottom wall of the first cup body 21, further saving space after storage and reducing the overall footprint of the machine. The first dry grinding blade 41 is covered inside the second cup seat 23, minimizing the damage caused by accidental rotation of the first dry grinding blade 41.

[0096] It should be noted that both Implementation Example 5 and Implementation Example 6 can be combined with Implementation Example 1 or Implementation Example 2 in any way to achieve avoidance.

[0097] Furthermore, in a preferred embodiment of the present invention, such as Figure 2 As shown, in the assembled state, there is a gap L2 between the side wall of the second cup body 22 and the side wall of the first cup body 21, and a gap L3 between the second cup seat 23 and the side wall of the second cup body 22, wherein L2 < L3. This embodiment can be combined with any of the above embodiments, and will not be described in detail here.

[0098] On the one hand, L2 < L3 ensures reliable radial limiting between the sidewall of the second cup body 22 and the sidewall of the first cup body 21. This prevents the second cup body 22 from swaying excessively relative to the first cup body 21, thus avoiding the first dry grinding blade 41 cutting the second cup seat 23, and minimizing losses caused by the first dry grinding blade 41's mis-rotation, especially in the case of the safety switch 12 being accidentally triggered and the mill tilted. On the other hand, L3 > L2 increases the gap between the second cup seat 23 and the sidewall of the second cup body 22, thereby reducing the size of the second cup seat 23 and lowering the probability of interference between the second cup seat 23 and the first dry grinding blade 41. Even if the safety switch 12 is accidentally triggered, it ensures protection for the second cup seat 23.

[0099] In the description of this invention, it should be understood that the terms "upper", "lower", "lateral", "vertical", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0100] In this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0101] The technical solutions protected by this invention are not limited to the above-described embodiments. It should be noted that any combination of the technical solutions of any embodiment with one or more other embodiments is within the scope of protection of this invention. Although the invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this invention are within the scope of protection claimed by this invention.

Claims

1. A reliable grinding mill, characterized in that, The device includes a main unit, a cup assembly, and a soundproof cover covering the cup assembly. The main unit contains a motor and a safety switch that controls the start and stop of the motor. The safety switch is triggered by the soundproof cover. The cup assembly includes a first cup and a second cup that can be replaced and installed above the main unit. The first cup contains a first dry grinding blade that is driven to rotate by the motor. The bottom of the second cup has a second cup seat. The second cup is installed to the main unit through the second cup seat. When the grinder is in a stored state, the second cup seat can be fitted into the first cup. The first dry grinding blade rotates to form a cutting space, and the second cup seat avoids the cutting space. The second cup holder includes a main body fixed to the bottom wall of the second cup body, a second dry sharpening blade is provided inside the second cup body, the blade shaft of the second dry sharpening blade passes through the main body, and a connector is provided below the second dry sharpening blade, the connector avoiding the cutting space; The first dry grinding tool includes an upper blade, and there is a vertical gap L1 between the portion of the upper blade facing below the connector and the bottom end of the connector.

2. The grinding mill with reliable structure according to claim 1, characterized in that, The vertical projection of the connector overlaps with that of the upper blade, and the upper blade extends upward from below the connector.

3. A reliable grinding mill according to claim 2, characterized in that, The upper blade is arranged around the outside of the connector.

4. A reliable grinding mill according to claim 1, characterized in that, The second cup holder includes a main body fixed to the bottom wall of the second cup body and a limiting sidewall extending downward from the edge of the main body to form a recessed cavity with an open bottom. A connector is provided in the recessed cavity, and the first dry grinding blade extends into the recessed cavity. Both the connector and the limiting sidewall avoid the cutting space.

5. A reliable grinding mill according to claim 4, characterized in that, The first dry grinding tool includes an upwardly extending upper blade that extends into the cavity.

6. A reliable grinding mill according to claim 1, characterized in that, When the grinding mill is in its stored state, there is a gap L2 between the side wall of the second cup body and the side wall of the first cup body, and a gap L3 between the second cup seat and the side wall of the second cup body, wherein L2 < L3.

7. A reliably structured grinding mill according to any one of claims 1-6, characterized in that, The second cup rests on the rim of the first cup, so that the second cup rest is suspended relative to the bottom wall of the first cup.

8. A reliable grinding mill according to claim 7, characterized in that, The first dry grinding tool has a lower blade extending below the limiting sidewall of the second cup seat. The rotation diameter of the lower blade is greater than or equal to the outer diameter of the second cup seat. There is a vertical gap L6 between the portion of the lower blade facing below the limiting sidewall and the bottom end of the limiting sidewall. The lower blade includes a downwardly extending first bent section and a second bent section extending laterally from the first bent section, the second bent section extending below the limiting sidewall.

9. A reliably structured grinding mill according to any one of claims 1-6, characterized in that, The second cup holder includes a main body fixed to the bottom wall of the second cup body and a limiting sidewall extending downward from the edge of the main body. The limiting sidewall is supported on the bottom wall of the first cup body, and the first dry grinding blade cover is installed inside the second cup holder.

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