Coffee grinder

Abstract

The coffee grinder comprises an outer grinding head, an inner grinding head and a stock bin shell, the outer grinding head is arranged on the outer side of the inner grinding head in a sleeving mode, and the bottom of the stock bin shell is attached to the top of the outer grinding head; a material passing part is arranged on the stock bin shell, a grinding channel is formed between the inner grinding head and the outer grinding head, and the grinding channel communicates with the material passing part; the inner diameter of the outer grinding head is at least equal to that of the material passing part. According to the coffee grinder, the material passing part is arranged on the material bin shell, the material passing part is used for guiding coffee beans into the grinding channel in order, the coffee beans are effectively buffered in the material passing part, and the grinding efficiency can be improved; the bottom of the material passing part is attached to the top of the outer grinding head, the inner diameter of the outer grinding head is at least equal to that of the material passing part, namely, the inner edge of the outer grinding head cannot protrude inwards to exceed the inner edge of the material passing part, the inner edge of the outer grinding head is completely located at the bottom of the material passing part, and coffee powder in the grinding channel cannot splash to the top of the outer grinding head to be left; coffee powder is prevented from remaining on parts difficult to clean, and potential sanitation hazards are reduced.

Description

Technical Field

[0001] This application relates to the technical field of grinders, and more particularly to a coffee grinder. Background Art

[0002] With the progress of society, coffee has gradually entered families. Freshly ground coffee has gradually replaced instant coffee, and people are more inclined to grind coffee by themselves to increase the fun. Therefore, many coffee grinders have been produced on the existing market, enabling users to conveniently grind coffee beans. The existing coffee grinders include a hopper, an inner grinding head, and an outer grinding head. The hopper is used to hold coffee beans, and the hopper is communicated with the grinding channel of the grinding tool. The inner grinding head can rotate relative to the outer grinding head to grind the coffee beans.

[0003] However, in the existing coffee grinders, when the lower end of the hopper fits with the outer grinding head, the inner diameter of the lower edge of the hopper is larger than the inner diameter of the outer grinding head of the grinding tool to increase the diameter of the bottom of the hopper, so that the coffee beans can fall into the grinding channel as much as possible. However, this will cause coffee powder to remain on the upper end of the outer grinding head, which is difficult to clean and prone to mildew over time, thus posing a hygiene hazard.

[0004] Therefore, there is room for further improvement in the coffee grinders in the prior art. Utility Model Content

[0005] In view of this, in response to the technical problem that coffee powder in the above-mentioned prior art is likely to remain on the upper end of the outer grinding head and is difficult to clean, which is likely to cause hygiene hazards, this application provides a coffee grinder, which is provided with a material passing part in the hopper. The lower end of the material passing part fits with the upper end of the outer grinding head, and the inner diameter of the material passing part is at most equal to the inner diameter of the outer grinding head, so that the inner edge of the outer grinding head will not protrude inward beyond the inner edge of the material passing part, thereby avoiding coffee powder remaining on the upper end of the outer grinding head and improving hygiene assurance.

[0006] This application provides a coffee grinder, including an outer grinding head, an inner grinding head, and a hopper housing. The outer grinding head is sleeved outside the inner grinding head, and the bottom of the hopper housing fits with the top of the outer grinding head.

[0007] The hopper housing is provided with a material passing part. There is a grinding channel between the inner grinding head and the outer grinding head, and the grinding channel is communicated with the material passing part.

[0008] Wherein, the inner diameter of the outer grinding head is at least equal to the inner diameter of the material passing part.

[0009] Compared with the prior art, the coffee grinder of the present application has a feed portion on the hopper shell, which is used to guide the coffee beans into the grinding channel in a relatively orderly manner. The coffee beans form an effective buffer in the feed portion, which can improve the grinding efficiency. In the present application, the bottom of the feed portion is fitted with the top of the outer grinding head, wherein the inner diameter of the outer grinding head is at least equal to the inner diameter of the feed portion, that is, the inner edge of the outer grinding head does not protrude inwardly beyond the inner edge of the feed portion, thereby making the feed portion protrude inwardly relative to the inner edge of the outer grinding head, thereby making the inner edge of the outer grinding head completely located at the bottom of the feed portion, and the ground coffee powder in the grinding channel will not splash to the top of the outer grinding head and remain, thereby avoiding the coffee powder remaining in a position that is more difficult to clean, reducing health hazards.

[0010] Preferably, the coffee grinder further comprises a power mechanism, wherein the power mechanism comprises a rotating shaft, and the rotating shaft passes through the material passing portion and is connected to the inner grinding head;

[0011] The material transfer part is provided with a connecting bracket, and one end of the connecting bracket away from the material transfer part is connected to the rotating shaft through a bearing;

[0012] A spring is arranged between the connecting bracket and the inner grinding head, and the spring is sleeved on the rotating shaft.

[0013] Preferably, the connecting bracket comprises a mounting tube and a supporting column, the mounting tube is connected to the rotating shaft, and an end of the mounting tube is provided with a mounting groove for mounting a bearing;

[0014] There are at least two support columns, which are arranged at equal intervals; one end of each support column is connected to the mounting tube, and the other end is connected to the material transfer portion.

[0015] Preferably, a connecting tube is provided in the installation tube, the connecting tube is sleeved on the rotating shaft, and an installation groove is formed between the end of the connecting tube and the inner wall of the installation tube;

[0016] A limiting block is disposed on the outer wall of the connecting tube, the connecting tube is connected to the mounting tube via the limiting block, and an end of the limiting block is flush with an end of the connecting tube.

[0017] Preferably, a retaining spring and a limiting ring are provided at one end of the mounting tube close to the power mechanism, and the limiting ring is sleeved on the rotating shaft;

[0018] The rotating shaft is provided with a clamping groove for installing a clamping ring, the limiting ring is located between the clamping ring and the installation tube, and the outer diameter of the limiting ring is larger than the inner diameter of the installation tube.

[0019] Preferably, the support column is an arched structure, and the support column is connected to the middle of the installation tube;

[0020] Reinforcing ribs are provided on the support column. The lower end of the reinforcing rib is connected to the top of the support column, and the inner side of the reinforcing rib is connected to the outer wall of the installation cylinder.

[0021] Preferably, an outer retaining ring is provided outside the material passing part, and the inner wall of the outer retaining ring faces the outer wall of the outer grinding head;

[0022] Supporting ribs are provided between the outer retaining ring and the material passing part. There are at least two supporting ribs, and the supporting ribs are arranged at equal intervals;

[0023] Among them, the bottom of the supporting rib is flush with the bottom of the material passing part.

[0024] Preferably, the material bin housing further includes a material holding part. The bottom of the material holding part is connected to the top of the material passing part. The material holding part is communicated with the material passing part, and the inner diameter of the top of the material holding part is larger than the inner diameter of the bottom.

[0025] Preferably, an installation bracket is further included. The installation bracket is connected to the material bin housing, and the outer grinding head is arranged on the installation bracket;

[0026] A limiting protrusion is provided at the bottom of the installation bracket, and the limiting protrusion is used to support the bottom of the outer grinding head.

[0027] Preferably, the installation bracket includes an installation sleeve and an installation ring. The inner wall of the installation ring is connected to the outer wall of the installation sleeve, and the outer wall of the installation ring faces the inner wall of the material bin housing;

[0028] Among them, a connecting column is provided on the material holding part, and the connecting column extends towards the installation bracket. A limiting hole for inserting the connecting column is provided on the installation ring;

[0029] The limiting protrusion is arranged at the bottom of the installation sleeve.

[0030] A coffee grinder of the present application has at least the following technical effects:

[0031] 1. By setting the inner diameter of the material passing part to be less than or equal to the inner diameter of the outer grinding head, the material passing part can orderly introduce coffee beans into the grinding channel, improving the grinding efficiency of the grinding channel. At the same time, the inner edge of the top of the outer grinding head is completely located at the bottom of the material passing part, which can prevent coffee powder in the grinding channel from entering the top of the outer grinding head and being difficult to clean, reducing hygienic hazards;

[0032] 2. By providing a bearing between the installation cylinder of the connecting bracket and the rotating shaft and providing a snap ring limiting ring at the upper end of the connecting cylinder, the bearing at the upper end of the installation cylinder is limited; a spring is provided between the installation cylinder and the inner grinding head, and the spring is sleeved on the bearing. The upper end of the spring is used to limit the bearing at the lower end of the installation cylinder, thereby improving the stability of the bearings at the upper and lower ends of the installation cylinder;

[0033] 3. Set up an installation bracket for installing the outer grinding head. At the same time, the installation bracket is connected to the bin housing, so that the outer grinding head can be fixed relative to the bin housing, thus ensuring the stability of the outer grinding head and the stability of ground coffee. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic perspective view of a coffee grinder provided by an embodiment of the present application;

[0035] Figure 2 is a schematic cross-sectional view of a coffee grinder provided by an embodiment of the present application;

[0036] Figure 3 is a schematic perspective view of the bin housing provided by an embodiment of the present application;

[0037] Figure 4 is a schematic cross-sectional view of the bin housing provided by an embodiment of the present application;

[0038] Figure 5 is a schematic perspective view of the installation bracket provided by an embodiment of the present application;

[0039] Figure 6 is Figure 2 a partially enlarged view of A.

[0040] Reference numerals: 1, upper housing; 2, power mechanism; 3, bin housing; 4, inner grinding head; 5, outer grinding head; 6, cup body; 7, grinding channel; 8, material storage part; 9, material passing part; 10, motor; 11, rotating shaft; 12, bearing; 13, connecting bracket; 14, installation cylinder; 15, support column; 16, connecting cylinder; 17, limiting block; 18, reinforcing rib; 19, spring; 20, outer retaining ring; 21, circlip; 22, installation groove; 23, limiting ring; 24, support rib; 25, installation bracket; 26, installation ring; 27, installation sleeve; 28, connecting column; 29, limiting hole; 30, limiting protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the following provides a detailed, clear, and complete description of the present disclosure in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0042] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0043] Those skilled in the art should understand that in the disclosure of this application, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this application.

[0044] The following further elaborates on this application in conjunction with the drawings. Refer to Figures 1 to 6 the description.

[0045] This application provides a coffee grinder (hereinafter referred to as the grinder), which is used to grind coffee beans into coffee powder. As Figures 1 to 2 shown, the grinder includes a housing assembly, a power mechanism 2, and a grinding assembly. The power mechanism 2 and the grinding assembly are both arranged inside the housing assembly. The grinding assembly is connected to the power mechanism 2. The power mechanism 2 is used to provide power to the grinding assembly, and the grinding assembly rotates to grind coffee beans into powder, realizing automatic grinding of coffee beans. In this application, the power mechanism 2 includes a motor 10, a reduction gearbox, a rotating shaft 11, a battery, and a charging base. The charging base is connected to the charging base and the motor 10. A charging port is provided on the charging base, enabling the user to charge the battery through the charging port. The battery is used to supply power to the motor 10. Of course, when the charging base is connected to an external power source, it can also directly supply power to the motor 10. The motor 10 is connected to the reduction gearbox, and the reduction gearbox is connected to the rotating shaft 11. The reduction gearbox drives the rotating shaft 11 to rotate. Among them, the grinding assembly includes an inner grinding head 4 and an outer grinding head 5. The rotating shaft 11 is connected to the inner grinding head 4, so that the rotating shaft 11 drives the inner grinding head 4 to rotate relative to the outer grinding head 5, thereby grinding the coffee beans in the grinding channel 7.

[0046] As Figure 2 shown, the housing assembly includes an upper housing 1, a hopper housing 3, and a cup body 6. The upper end of the hopper housing 3 is connected to the upper housing 1, and the lower end of the hopper housing 3 is connected to the cup body 6. The hopper housing 3 is detachably connected to the upper housing 1, and the cup body 6 is detachably connected to the hopper housing 3. The upper housing 1 is used to install the power mechanism 2, the hopper housing 3 is used to hold coffee beans, and the cup body 6 is used to hold the ground coffee powder. The grinding assembly is located at the lower end of the hopper housing 3. The upper end of the grinding channel 7 of the grinding assembly is communicated with the hopper housing 3 to facilitate the entry of coffee beans into the grinding channel 7, and the lower end of the grinding channel 7 is communicated with the cup body 6 to facilitate the ground coffee powder to enter the cup body 6 from the grinding channel 7.

[0047] It should be noted that the power mechanism 2 can also be replaced by a manual driving mechanism, that is, the function of manually grinding coffee beans can be realized; in addition, whether the cup body 6 is provided or not can also be selected according to actual needs. Of course, in addition to grinding coffee beans, the grinder of the present application can also grind other bean products, such as soybeans, or other seasonings, such as agricultural products like Chinese prickly ash and chili peppers.

[0048] As Figures 2 to 4 shown, a material passing part 9 and a material holding part 8 are provided on the bin housing 3. The material holding part 8 is located at the upper end of the material passing part 9. The bottom of the material holding part 8 is connected to the top of the material passing part 9. The material holding part 8 communicates with the material passing part 9. Among them, the inner diameter of the top of the material holding part 8 is larger than the inner diameter of the bottom, so that the material holding part 8 presents a bowl-shaped structure with a large top and a small bottom, its opening is large, and the bottom outlet is small. The material holding part 8 is used to hold coffee beans so that the grinder can hold a relatively large amount of coffee beans at one time.

[0049] Furthermore, as Figure 4 、 Figure 6 shown, a material passing channel is provided in the material passing part 9. The upper end of the material passing channel communicates with the material holding part 8, and the lower end of the material passing channel communicates with the grinding channel 7; the material passing part 9 is integrally in a cylindrical structure, the bottom of the material passing part 9 is a flat end face, and the bottom of the material passing part 9 fits with the top of the outer grinding head 5. Among them, the inner diameter of the outer grinding head 5 is at least equal to the inner diameter of the material passing part 9, that is, the inner diameter of the outer grinding head 5 is greater than or equal to the inner diameter of the material passing part 9, so that the inner edge of the top of the outer grinding head 5 is completely located at the lower end of the material passing part 9, so that coffee powder will not enter the top of the outer grinding head 5, avoiding the residue of coffee powder in places that are difficult to clean and reducing the hygiene hazard. In this embodiment, the material passing part 9 is located between the material holding part 8 and the grinding channel 7. The material passing part 9 can orderly introduce coffee beans into the grinding channel 7 and effectively buffer the entry of coffee beans into the grinding channel 7, avoiding the coffee beans in the material holding part 8 from pouring into the grinding channel 7 all at once, thus ensuring the grinding effect.

[0050] As Figure 6 shown, a connecting bracket 13 is provided on the material passing part 9. The connecting bracket 13 extends towards the power mechanism 2. The bottom of the connecting bracket 13 is connected to the material passing part 9. One end of the connecting bracket 13 away from the material passing part 9 is connected to the rotating shaft 11. Among them, a bearing 12 is provided between the connecting bracket 13 and the rotating shaft 11 so that the rotating shaft 11 can rotate relative to the connecting bracket 13 and can improve the connection stability between the bin housing 3 and the rotating shaft 11, effectively avoiding the misalignment of the bin housing 3 relative to the inner grinding head 4 and ensuring the relative position stability between the bin housing 3 and the outer grinding head 5.

[0051] Furthermore, as Figure 6As shown, the connecting bracket 13 includes an installation cylinder 14 and a support column 15. The installation cylinder 14 is a cylindrical structure. The rotating shaft 11 is arranged inside the installation cylinder 14. The bottom of the installation cylinder 14 is connected to the support column 15. One end of the support column 15 away from the installation cylinder 14 is connected to the material passing part 9. Among them, installation grooves 22 are provided at both ends of the installation cylinder 14. The installation grooves 22 are recessed towards the middle of the installation cylinder 14. The installation cylinder 14 is used for installing the bearing 12.

[0052] As Figure 6 shown, a snap ring 21 and a limit ring 23 are provided at one end of the installation cylinder 14 close to the power mechanism 2, that is, the snap ring 21 and the limit ring 23 are provided at the upper end of the installation cylinder 14. Both the limit ring 23 and the snap ring 21 are arranged on the rotating shaft 11. Among them, the limit ring 23 is located at the lower end of the snap ring 21. The limit ring 23 is located between the snap ring 21 and the installation cylinder 14. A clamping groove for installing the snap ring 21 is provided on the rotating shaft 11. The snap ring 21 is fixed relative to the rotating shaft 11. The snap ring 21 is used for limiting the upper end of the limit ring 23. The outer diameter of the limit ring 23 is larger than the inner diameter of the installation cylinder 14, so that the limit ring 23 limits the bearing 12 installed at the upper end of the installation cylinder 14 to prevent the bearing 12 from moving upward.

[0053] Among them, as Figure 2 、 Figure 6 shown, a spring 19 is sleeved on the rotating shaft 11. The spring 19 is located between the installation cylinder 14 and the inner grinding head 4. That is, the upper end of the spring 19 abuts against the bearing 12 at the lower end of the installation cylinder 14, and the lower end of the spring 19 abuts against the upper end of the inner grinding head 4. In this embodiment, the rotating shaft 11 drives the inner grinding head 4 to move up and down axially, which can change the size of the grinding channel 7 between the inner grinding head 4 and the outer grinding head 5, so as to realize the adjustment of the grinding fineness of coffee beans. On the one hand, the spring 19 can limit the bearing 12 at the lower end of the installation cylinder 14, and on the other hand, the spring 19 can apply an axial force to the inner grinding head 4 to ensure the stability of the grinding channel 7.

[0054] As Figure 4 、 Figure 6As shown in the figure, the support column 15 is further extended. One end of the support column 15 is connected to the mounting cylinder 14, and the other end is connected to the material passing part 9. The upper end of the support column 15 is connected to the middle or lower part of the mounting cylinder 14, which can reduce the manufacturing material of the support column 15 and effectively save the manufacturing cost. There are at least two support columns 15, and the support columns 15 are arranged at equal intervals along the circumferential direction of the material passing part 9. An opening is formed between the support columns 15 for the coffee beans in the material holding part 8 to enter the material passing part 9. Among them, in this embodiment, the support column 15 is set to four. The support column 15 is in an arched structure, which can increase the structural strength and structural stability of the support column 15 and effectively bear the pressure of the coffee beans in the material holding part 8 on the support column 15. Among them, reinforcing ribs 18 are provided on the support column 15. The lower end of the reinforcing rib 18 is connected to the top of the support column 15, the inner side of the reinforcing rib 18 is connected to the outer wall of the mounting cylinder 14, the lower end surface of the reinforcing rib 18 is fitted with the upper end surface of the support column 15, and the reinforcing rib 18 is basically in a triangular structure. The reinforcing rib 18 can increase the connection strength and connection stability between the mounting cylinder 14 and the connecting column 28.

[0055] As Figure 4 , Figure 6 shown in the figure, the mounting cylinder 14 is further extended. A connecting cylinder 16 is provided inside the mounting cylinder 14. The outer diameter of the connecting cylinder 16 is smaller than the inner diameter of the mounting cylinder 14. The connecting cylinder 16 is sleeved on the rotating shaft 11. The inner diameter of the connecting cylinder 16 is slightly larger than the outer diameter of the rotating shaft 11. Among them, the axial length of the connecting cylinder 16 is smaller than the axial length of the mounting cylinder 14, and the axis of the connecting cylinder 16 is on the same straight line as the axis of the mounting cylinder 14. Among them, there is a gap between the axial ends of the connecting cylinder 16 and the axial ends of the mounting cylinder 14. An installation groove 22 is formed between the end of the connecting cylinder 16 and the inner wall of the mounting cylinder 14 for installing the bearing 12. As Figure 4 shown in the figure, a limiting block 17 is provided on the outer wall of the connecting cylinder 16. The connecting cylinder 16 is connected to the mounting cylinder 14 through the limiting block 17. The end of the limiting block 17 is flush with the end of the connecting cylinder 16. There is at least one limiting block 17, and the limiting block 17 is located between the mounting cylinder 14 and the connecting cylinder 16. The limiting block 17 is used to support and limit the bearing 12. At the same time, by setting the limiting block 17, the connection between the mounting cylinder 14 and the connecting cylinder 16 can be realized, and the manufacturing cost can be saved. In this embodiment, the limiting block 17 is set to six, and the six limiting blocks 17 are arranged at equal intervals. The gap between the limiting blocks 17 can play a heat dissipation effect and avoid overheating at the connection between the rotating shaft 11 and the connecting cylinder 16.

[0056] As Figure 3 , Figure 4 , Figure 6As shown, an outer retaining ring 20 is provided outside the material passing portion 9. The outer retaining ring 20 is sleeved outside the material passing portion 9. The axis of the outer retaining ring 20 is on the same straight line as that of the material passing portion 9. The inner diameter of the outer retaining ring 20 is greater than the outer diameter of the material passing portion 9, that is, there is a gap between the inner wall of the outer retaining ring 20 and the outer wall of the material passing portion 9. The inner wall of the outer retaining ring 20 faces the outer wall of the outer grinding head 5, so that the outer retaining ring 20 can limit the outside of the outer grinding head 5 to prevent the outer grinding head 5 from moving and misaligning. Moreover, the outer retaining ring 20 can provide secondary protection to prevent powder from passing through the outer retaining ring 20. It should be noted that the inner wall of the outer retaining ring 20 can be in contact with the outer wall of the outer grinding head 5, or there can be a slight gap between the inner wall of the outer retaining ring 20 and the outer wall of the outer grinding head 5, which can be selected according to actual needs.

[0057] As Figure 3 、 Figure 4 shown, support ribs 24 are provided between the outer retaining ring 20 and the material passing portion 9. There are at least two support ribs 24, and the support ribs 24 are arranged at equal intervals. The outer retaining ring 20 and the material passing portion 9 are strengthened and connected through the support ribs 24, making the structure of the bin housing 3 relatively stable. It should be noted that in this embodiment, the number of support ribs 24 is set to twelve, and the number of them can be selected according to actual needs. In addition, the outer retaining ring 20 is a closed ring structure, which can be set to a circular shape, an oval shape, or other shapes. In actual use, the structure of the outer retaining ring 20 can be selected according to needs. Among them, the structure of the outer retaining ring 20 can also be adapted to the shape of the outer grinding head 5.

[0058] Furthermore, as Figure 6 shown, the radial thickness of the material passing portion 9 is less than the radial thickness of the outer grinding head 5, the inner diameter of the material passing portion 9 is less than the inner diameter of the outer grinding head 5, and the outer diameter of the material passing portion 9 is less than the outer diameter of the outer grinding head 5, that is, the outer edge of the material passing portion 9 is completely located at the upper end of the material passing portion 9, and at least part of the material passing portion 9 is in contact with the upper end of the material passing portion 9, so as to ensure the fitting property between the material passing portion 9 and the outer grinding head 5. In this embodiment, the bottom of the support rib 24 is flush with the bottom of the material passing portion 9, so as to strengthen the connection stability between the bin housing 3 and the outer grinding head 5, and ensure that the connection stability between the outer retaining ring 20, the material passing portion 9, the support rib 24 and the outer grinding head 5 is better under the cooperation of the three.

[0059] As Figures 5 to 6As shown in the figure, the coffee grinder is further expanded; in this embodiment, the coffee grinder further includes a mounting bracket 25. The mounting bracket 25 is connected to the bin housing 3, and the outer grinding head 5 is arranged on the mounting bracket 25, that is, the mounting bracket 25 is used to mount the outer grinding head 5. Specifically, the mounting bracket 25 includes a mounting sleeve 27 and a mounting ring 26. The mounting sleeve 27 is a special-shaped cylinder, and the structure of the mounting sleeve 27 is the same as that of the outer grinding head 5. The inner wall of the mounting sleeve 27 fits with the outer wall of the outer grinding head 5. Among them, a limiting protrusion 30 is provided at the bottom of the mounting sleeve 27. The limiting protrusion 30 protrudes towards the center of the mounting sleeve 27, and the protruding length of the limiting protrusion 30 is less than the radial thickness of the outer grinding head 5, that is, the outer edge of the limiting protrusion 30 does not exceed the inner edge of the outer grinding head 5, so that the coffee powder in the grinding channel 7 will not enter the limiting protrusion 30, reducing the hygiene hazard. The limiting protrusion 30 fits with the bottom of the outer grinding head 5, and the limiting protrusion 30 is used to support the bottom of the outer grinding head 5 to prevent the outer grinding head 5 from falling out of the mounting sleeve 27, and can realize the stable connection of the mounting bracket 25 to the outer grinding head 5.

[0060] As Figure 5 shown, the mounting ring 26 is sleeved on the outside of the mounting sleeve 27. The axial thickness of the mounting ring 26 is less than the axial thickness of the mounting sleeve 27. The mounting ring 26 is connected to the upper end of the mounting sleeve 27. The inner wall of the mounting ring 26 is connected to the outer wall of the mounting sleeve 27. The outer wall of the mounting ring 26 faces the inner wall of the bin housing 3. The outer wall of the mounting ring 26 can be set to fit with the inner wall of the bin housing 3, or there can be a slight gap between the outer wall of the mounting ring 26 and the inner wall of the bin housing 3, which can be selected according to actual needs in actual use. Among them, as Figure 5 shown, the mounting ring 26 is L-shaped, and the outer side of the mounting ring 26 has an upward-extending annular ring to increase the contact area between the mounting ring 26 and the bin housing 3, thereby increasing the connection stability.

[0061] Among them, as Figure 3 、 Figure 6 shown, the material holding part 8 is provided with a connecting column 28. The connecting column 28 is a cylindrical structure, and the connecting column 28 extends towards the mounting bracket 25. As Figure 5 、 Figure 6 shown, the mounting ring 26 is provided with a limiting hole 29 for the connecting column 28 to insert. The bottom of the connecting column 28 is inserted into the limiting hole 29 to realize the connection between the mounting bracket 25 and the bin housing 3, and can further strengthen the connection stability of the mounting bracket 25, the outer grinding head 5 and the bin housing 3.

[0062] It should be noted that in the case where the various embodiments of the present application do not conflict with the solutions and the technical solutions can coexist, they can be arbitrarily combined into new embodiments.

[0063] The above has introduced the present application in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A coffee grinder, characterized in that: It comprises an outer grinding head (5), an inner grinding head (4) and a silo shell (3), wherein the outer grinding head (5) is sleeved on the outer side of the inner grinding head (4), and the bottom of the silo shell (3) is in contact with the top of the outer grinding head (5); The silo shell (3) is provided with a material transfer portion (9), a grinding channel (7) is provided between the inner grinding head (4) and the outer grinding head (5), and the grinding channel (7) is connected to the material transfer portion (9); Wherein, the inner diameter of the outer grinding head (5) is at least equal to the inner diameter of the material transfer portion (9).

2. The coffee grinder according to claim 1, characterized in that The coffee grinder further comprises a power mechanism (2), wherein the power mechanism (2) comprises a rotating shaft (11), and the rotating shaft (11) passes through the material transfer portion (9) and is connected to the inner grinding head (4); The material transfer portion (9) is provided with a connecting bracket (13), and one end of the connecting bracket (13) away from the material transfer portion (9) is connected to the rotating shaft (11) via a bearing (12); A spring (19) is provided between the connecting bracket (13) and the inner grinding head (4), and the spring (19) is sleeved on the rotating shaft (11).

3. The coffee grinder according to claim 2, characterized in that The connecting bracket (13) comprises a mounting tube (14) and a supporting column (15); the mounting tube (14) is connected to the rotating shaft (11); and a mounting groove (22) for mounting a bearing (12) is provided at an end of the mounting tube (14); There are at least two support columns (15), and the support columns (15) are arranged at equal intervals; one end of the support column (15) is connected to the installation cylinder (14), and the other end is connected to the material transfer portion (9).

4. The coffee grinder according to claim 3, characterized in that A connecting tube (16) is provided inside the installation tube (14), the connecting tube (16) is sleeved on the rotating shaft (11), and an end of the connecting tube (16) and an inner wall of the installation tube (14) form a mounting groove (22); A limit block (17) is provided on the outer wall of the connecting tube (16), the connecting tube (16) is connected to the mounting tube (14) via the limit block (17), and the end of the limit block (17) is flush with the end of the connecting tube (16).

5. The coffee grinder according to claim 3, characterized in that A retaining ring (21) and a limiting ring (23) are provided at one end of the mounting tube (14) close to the power mechanism (2), and the limiting ring (23) is sleeved on the rotating shaft (11); The rotating shaft (11) is provided with a slot for installing a retaining ring (21), the limiting ring (23) is located between the retaining ring (21) and the installation tube (14), and the outer diameter of the limiting ring (23) is greater than the inner diameter of the installation tube (14).

6. The coffee grinder according to claim 3, characterized in that The support column (15) is an arched structure, and the support column (15) is connected to the middle part of the installation tube (14); The support column (15) is provided with a reinforcing rib (18), the lower end of the reinforcing rib (18) is connected to the top of the support column (15), and the inner side of the reinforcing rib (18) is connected to the outer wall of the installation tube (14).

7. The coffee grinder according to claim 1, characterized in that An outer retaining ring (20) is disposed outside the material transfer portion (9), and the inner wall of the outer retaining ring (20) faces the outer wall of the outer grinding head (5); Support ribs (24) are provided between the outer retaining ring (20) and the material transfer portion (9), and there are at least two support ribs (24), and the support ribs (24) are arranged at equal intervals; Wherein, the bottom of the supporting rib (24) is flush with the bottom of the material transfer portion (9).

8. The coffee grinder according to claim 1, characterized in that The silo shell (3) further comprises a material holding portion (8), the bottom of the material holding portion (8) being connected to the top of the material transfer portion (9), the material holding portion (8) being in communication with the material transfer portion (9), and the inner diameter of the top of the material holding portion (8) being greater than the inner diameter of the bottom.

9. The coffee grinder according to claim 8, characterized in that It also includes a mounting bracket (25), the mounting bracket (25) is connected to the silo housing (3), and the external grinding head (5) is arranged on the mounting bracket (25); A limiting protrusion (30) is provided at the bottom of the mounting bracket (25), and the limiting protrusion (30) is used to support the bottom of the outer grinding head (5).

10. The coffee grinder according to claim 9, characterized in that The mounting bracket (25) comprises a mounting sleeve (27) and a mounting ring (26), the inner wall of the mounting ring (26) is connected to the outer wall of the mounting sleeve (27), and the outer wall of the mounting ring (26) is opposite to the inner wall of the silo shell (3); The material receiving portion (8) is provided with a connecting column (28), the connecting column (28) extends toward the mounting bracket (25), and the mounting ring (26) is provided with a limiting hole (29) for inserting the connecting column (28); The limiting protrusion (30) is arranged at the bottom of the installation sleeve (27).

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