Bean grinding device of coffee machine

Abstract

The utility model discloses a coffee machine bean grinding device which comprises a bean box, an adjusting ring, a support, a grinding assembly and a rotating wheel, and the bean box is detachably installed on the adjusting ring. A microswitch, a bean grinding chamber and a powder outlet channel are arranged on the support, and the bean grinding chamber is communicated with the powder outlet channel; the grinding assembly comprises a conical cutter, a grinding disc and a driving mechanism, the conical cutter is fixedly installed in the bean grinding cavity, the grinding disc is detachably installed in the bean grinding cavity, a bean grinding gap is formed between the conical cutter and the grinding disc, and the microswitch is electrically connected with the driving mechanism and used for starting and stopping the driving mechanism; the outer side of the rotating wheel is connected with the adjusting ring; a convex rib is arranged on the adjusting ring or the rotating wheel, the bean box rotates to drive the adjusting ring to rotate, the adjusting ring can rotate to drive the rotating wheel to rotate, the convex rib triggers the microswitch, the driving mechanism starts to grind beans, a user must rotate the bean box after installing the bean box to trigger the microswitch, and the situation that the user mistakenly touches the bean box to trigger bean grinding is avoided; the whole safety performance of the bean grinding device is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of coffee machines, and in particular relates to a coffee bean grinding device for a coffee machine. Background Art

[0002] Existing semi-automatic coffee machines all have a bean grinding function. When using, the user first grinds the coffee beans into coffee powder through the bean grinding device, and then brews and extracts the coffee powder. Usually, in order to avoid accidents caused by the idling of the bean grinding cone due to the operation of the motor when the bean box is not installed, or people accidentally touching the cone and getting injured, semi-automatic coffee machines are provided with a safety protection mechanism. For example, CN202322313539.X discloses a bean grinder safety protection device and a bean grinder, which is provided by setting a first positioning column at the bottom of the bean box, a positioning hole at the bean box fixing seat, a second positioning column at the switch movable cover, the first fixing column passes through the switch movable cover and is fixed on the fixing ring, a spring column and a positioning column are provided on the fixing ring, a reset spring is sleeved on the spring column, and the other end is pressed against the outer ring of the switch movable cover, and the switch movable cover is arranged between the bean box fixing seat and the fixing ring in a floating manner. When the bean box leaves the bean box fixing seat, the reset spring lifts the switch movable cover, and the micro switch is in a power-off state. When the bean hopper is installed in the machine, the first positioning post is inserted into the positioning hole. The first positioning post presses down the second positioning post, which moves the switch cover downward, pressing down the microswitch and triggering it. This protective mechanism uses a spring and spring post structure to control the activation and deactivation of the microswitch. The user only needs to press down the second positioning post to trigger the microswitch. However, the second positioning post is located in the positioning hole of the bean hopper mounting base. When the bean hopper is not installed in the machine, the second positioning post is exposed to the outside. Users can easily accidentally touch the second positioning post, triggering the microswitch and causing the grinder to operate, which can easily lead to accidental injury. The overall safety performance of this protective mechanism is poor. Utility Model Content

[0003] The purpose of the utility model is to provide a bean grinding device for a coffee machine, so as to solve the technical problem that the bean grinding device in the existing coffee machine is prone to accidentally touching the micro switch, resulting in poor safety.

[0004] The utility model provides a coffee bean grinding device which can be realized by the following technical solutions:

[0005] A coffee bean grinding device, comprising:

[0006] bean box;

[0007] an adjusting ring, on which the bean box is detachably mounted;

[0008] A bracket, wherein a micro switch, a bean grinding chamber, and a powder outlet channel are provided on the bracket, wherein the bean grinding chamber is connected to the powder outlet channel;

[0009] A grinding assembly comprising a conical cutter, a grinding disc, and a drive mechanism, wherein the conical cutter is fixedly mounted in the bean grinding chamber and electrically connected to the drive mechanism, the grinding disc is detachably mounted in the bean grinding chamber, a grinding gap is formed between the conical cutter and the grinding disc, and the micro switch is electrically connected to the drive mechanism for turning the drive mechanism on and off;

[0010] A rotating wheel, wherein the outer side of the rotating wheel is connected to the adjusting ring, and the inner side of the rotating wheel is rotatably connected to the grinding disc, so that the grinding disc can move up and down relative to the conical cutter;

[0011] The adjusting ring or the rotating wheel is provided with ribs, and the rotation of the bean box can drive the adjusting ring to rotate, so that the ribs trigger the micro switch and the driving mechanism starts to work.

[0012] In one embodiment, the adjustment ring includes a rotating ring and a limiting ring arranged above and below, the inner diameter of the limiting ring is larger than the inner diameter of the rotating ring, the bean box is detachably mounted on the rotating ring, and the rib is provided on the limiting ring.

[0013] In one embodiment, the rotating ring is detachably connected to the limiting ring, and the rotating ring is rotatably connected to the outer side surface of the rotating wheel.

[0014] In one embodiment, a protrusion is provided on the rotating ring, a positioning groove is provided on the limiting ring, and the protrusion is clamped in the positioning groove.

[0015] In one embodiment, the outer side surface of the upper portion of the rotating wheel is provided with a plurality of grooves, the inner side surface of the adjusting ring is provided with a plurality of positioning ribs, the positioning ribs are stuck in the grooves, and the lower portion of the rotating wheel is provided with the convex ribs.

[0016] In one embodiment, the convex rib is in the form of an arc segment.

[0017] In one embodiment, the rotating wheel is provided with a boss, and the limiting ring is mounted on the boss. When the rotating ring rotates, the limiting ring slides on the boss.

[0018] In one embodiment, the bracket is provided with a mounting platform, the micro switch is located on the mounting platform, and the mounting platform is located on one side of the bean grinding chamber.

[0019] In one embodiment, the grinding wheel includes a cutter wheel and a grinding wheel frame, the cutter wheel and the grinding wheel frame are detachably connected, the rotating wheel is provided with an internal thread, the grinding wheel frame is built into the rotating wheel, the grinding wheel frame is provided with an external thread, and the internal thread is connected to the external thread.

[0020] In one embodiment, a handle is provided on the knife disc.

[0021] Compared with the prior art, the bean grinding device of the utility model has the following beneficial effects: by arranging an adjusting ring and a rotating wheel, ribs are provided on the adjusting ring or the rotating wheel, the rotating wheel is connected to the adjusting ring, the bean box rotates to rotate the adjusting ring, the adjusting ring rotates, the rotating wheel rotates, the ribs trigger the micro switch, the driving mechanism works to start grinding beans, the user must install the bean box and then rotate it to trigger the micro switch, avoiding the situation where the user accidentally touches the micro switch and triggers it, and the overall safety performance of the bean grinding device is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the overall decomposition of a coffee bean grinding device of the utility model;

[0024] Figure 2 This is a cross-sectional view of a coffee machine bean grinding device of the utility model, removing the bean box;

[0025] Figure 3 This is a partially exploded schematic diagram of the bean grinding device of the coffee machine according to the first embodiment of the present invention, with the bean box removed;

[0026] Figure 4 This is a partially exploded schematic diagram of the bean grinding device of the coffee machine according to the second embodiment of the present invention, excluding the bean box;

[0027] Figure 5 yes Figure 3 Schematic diagram of the adjustment ring in the coffee machine grinding device shown in the figure.

[0028] Indications in the figure: 1. Bean box; 11. Clamp; 2. Adjusting ring; 21. Rotating ring; 211. Protrusion; 212. Mounting slot; 22. Limiting ring; 221. Positioning slot; 23. Positioning rib; 3. Bracket; 31. Micro switch; 32. Powder outlet channel; 33. Mounting platform; 34. Grinding chamber; 4. Grinding assembly; 41. Conical cutter; 42. Grinding disc; 421. Cutting disc; 4211. Handle; 422. Grinding disc holder; 4221. External thread; 43. Driving mechanism; 5. Rotating wheel; 51. Groove; 52. Boss; 53. Internal thread; 6. Raised rib. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] Example 1

[0032] Figure 1 This is a schematic diagram of the overall decomposition of the coffee machine bean grinding device of this embodiment. Figure 2 This is a cross-sectional view of the coffee machine bean grinding device of this embodiment, removing the bean box; Figure 3 is a partially exploded schematic diagram of the bean grinding device of the coffee machine of this embodiment, excluding the bean box; Figure 5 Schematic diagram of the decomposition of the adjustment ring in the coffee machine grinding device of this embodiment.

[0033] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 5 A coffee machine bean grinding device includes a bean box 1, an adjusting ring 2, a bracket 3, a grinding assembly 4 and a rotating wheel 5. The bean box 1 is detachably mounted on the adjusting ring 2. In this embodiment, a clamping block 11 is provided on the bean box 1, and the adjusting ring 2 is provided with a mounting groove 212. When the bean box 1 is mounted on the adjusting ring 2, the clamping block 11 is mounted in the mounting groove 212, so that the bean box 1 and the adjusting ring 2 are mounted together. When the user rotates the bean box 1, the adjusting ring 2 can be driven to rotate.

[0034] The bracket 3 is provided with a micro switch 31, a bean grinding chamber 34 and a powder discharge channel 32. The micro switch 31 is used to control the opening and closing of the grinding assembly 4. The grinding assembly 4 is installed in the bean grinding chamber 34 and is used to grind the coffee beans dropped from the bean box 1 into coffee powder. The bean grinding chamber 34 is connected to the powder discharge channel 32, and the powder discharge channel 32 is connected to the powder discharge port on the coffee machine body. The coffee powder in the bean grinding chamber 43 is transported to the powder discharge port of the coffee machine through the powder discharge channel 32. The user can receive coffee powder by installing the handle with the powder bowl on the powder discharge port.

[0035] Specifically, the grinding assembly 4 includes a conical cutter 41, a grinding disc 42, and a drive mechanism 43. The conical cutter 41 is fixedly mounted in the bean grinding chamber 34 and is electrically connected to the drive mechanism 43. That is, the drive mechanism 43 provides power for the operation of the conical cutter 41. The grinding disc 42 is detachably mounted in the bean grinding chamber 34. A grinding gap is formed between the conical cutter 41 and the grinding disc 42. The microswitch 31 is electrically connected to the drive mechanism 41 and is used to open and close the drive mechanism 41, thereby controlling the operation of the conical cutter 41 and controlling the opening and closing of the grinding assembly 4. In this embodiment, the drive mechanism 43 is a motor.

[0036] The outer side of the rotating wheel 5 is connected to the adjusting ring 2, and the rotation of the adjusting ring 2 drives the rotating wheel 5 to rotate. The inner side of the rotating wheel 5 is rotatably connected to the grinding disc 42, so that the grinding disc 42 can move up and down relative to the conical blade 41, thereby adjusting the size of the grinding gap, and thus the coarseness of the ground coffee powder. The adjusting ring 2 is provided with a rib 6. When the user installs the bean box 1 on the coffee machine, the bean box 1 and the adjusting ring 2 are installed together. The rotation of the bean box 1 drives the adjusting ring 2 to rotate, so that the rib 6 rotates to abut the micro switch 31, thereby triggering the micro switch 31. At this time, the driving mechanism 43 starts to work, and the conical blade 41 rotates, activating the bean grinding function.

[0037] In the bean grinding device of this embodiment, the user must install the bean box 1 on the adjustment ring 2 and rotate the bean box 1 to trigger the micro switch 31 to activate the drive mechanism 43 and start the bean grinding function. At this time, the grinding assembly 4 is covered by the bean box 1 and cannot be directly touched by the user. This prevents the user from accidentally touching the micro switch 31 while the grinding assembly 4 is exposed, thereby improving overall safety.

[0038] In the grinding assembly 4 of the bean grinding device of this embodiment, the conical cutter 41 is fixedly mounted on the bottom of the bean grinding chamber 34, the grinding disc 42 is detachably mounted on the top of the bean grinding chamber 34, and the lower end of the grinding disc 42 is built into the bean grinding chamber 34, thereby forming a bean grinding gap between the two. When the coffee beans in the bean box 1 fall into the bean grinding gap, the conical cutter 41 is activated, and the coffee beans are ground into coffee powder through the cooperation of the conical cutter 41 and the grinding disc 42. The coffee powder is transported to the powder outlet from the powder outlet channel 42. The grinding disc 42 is conical in shape, with a larger upper portion and a lower lower portion. The farther the distance between the conical cutter 41 and the grinding disc 42, the larger the bean grinding gap and the coarser the ground coffee powder.

[0039] For further information, see Figure 2 and Figure 5The adjustment ring 2 includes a rotating ring 21 and a retaining ring 22, arranged above and below. The retaining ring 22 has a larger inner diameter than the rotating ring 21. The bean box 1 is detachably mounted on the rotating ring 21, and the rib 6 is provided on the retaining ring 22. It will be appreciated that in this embodiment, the mounting groove 212 is provided on the rotating ring 21, and the clamping block 1 is adapted to be mounted within the mounting groove 212. With the retaining ring 22 having a larger inner diameter than the rotating ring 21, the retaining ring 22 can wrap around the outside of the rotating wheel 5 during installation. This design shortens the gap between the rib 6 and the microswitch 31, preventing abutment failure.

[0040] In this embodiment, the retaining ring 22 and the rotating ring 21 are integrally formed using a process such as injection molding to form the adjustment ring 2. Of course, the rotating ring 21 and the retaining ring 22 may also be assembled separately to form the adjustment ring 2, and the specific formation method is not limited. The rotating ring 21 and / or the retaining ring 22 are rotatably connected to the outer surface of the rotating wheel 5. Rotation of the bean box 1 drives the rotating wheel 5, adjusting the vertical movement of the grinding disc 42, thereby adjusting the bean grinding gap.

[0041] For further information, see Figure 5 In order to facilitate installation, the rotating ring 21 and the limiting ring 22 are detachably connected, and the rotating ring 21 is rotatably connected to the outer side of the rotating wheel 5. With this design, the limiting ring 22 can be set to a narrow and wide side.

[0042] Specifically, a protrusion 211 is provided on the rotating ring 21, and a positioning groove 221 is provided on the limiting ring 22. The protrusion 211 is clamped in the positioning groove 221. During installation, the limiting ring 22 is first put on the outside of the rotating wheel 5 near the bottom position, and then the rotating ring 21 is put on the upper part of the rotating wheel 5, and the protrusion 211 is clamped in the positioning groove 221 to complete the assembly.

[0043] Furthermore, the rotating wheel 5 is provided with a boss 51, on which the retaining ring 22 is mounted. When the rotating ring 21 rotates, it drives the retaining ring 22 to slide on the boss 51. This design not only facilitates positioning of the rotating ring 21 during installation, but also provides support for the retaining ring 22, preventing deformation during rotation. In actual use, a gear can be positioned at the bottom of the boss 51, with the lower part of the gear abutting against an ejector pin, making it easier to calculate the arc of rotation.

[0044] For further information, see Figure 2 and Figure 3The outer side surface of the upper portion of the rotating wheel 5 is provided with a plurality of grooves 51, and the inner side surface of the adjusting ring 2 is provided with a plurality of positioning ribs 23. The positioning ribs 51 are retained in the grooves 51, thereby connecting the adjusting ring 2 to the rotating wheel 5. In this embodiment, the positioning ribs 23 are spaced apart on the inner sidewall of the upper portion of the adjusting ring 2. Specifically, the positioning ribs 23 are located on the inner sidewall of the rotating ring 2, and the mounting groove 21 is located at the top of the rotating ring 2.

[0045] Furthermore, in order to ensure that the drive mechanism 43 is always in operation during the process of adjusting the grinding fineness of the coffee powder by the user and to prevent the cone cutter 41 from intermittently stopping, the rib 6 is an arc segment. Specifically, the rib 6 is an arc segment having the same center as the limiting ring 22.

[0046] Furthermore, the bracket 3 is provided with a mounting platform 33, on which the microswitch 31 is located. The mounting platform 33 is located on one side of the bean grinding chamber 34, thereby facilitating the installation of the microswitch 31. The mounting orientation of the microswitch 31 can also be adjusted according to actual circumstances. For example, when the rib 6 is located on the bottom surface of the retaining ring 22, the trigger end of the microswitch 31 can be oriented upward, so that the trigger end is located below the retaining ring 22. As the bean box 1 rotates, when the rib 6 abuts the trigger end of the microswitch 31, the drive mechanism 43 is activated.

[0047] In this embodiment, the rib 6 is provided on the side of the limit ring 22, and the trigger end of the micro switch 31 is located on one side of the limit ring 22. As the bean box 1 rotates, when the rib 5 abuts against the trigger end of the micro switch 31, the drive mechanism 43 is activated to enable the coffee machine to start grinding beans.

[0048] Furthermore, the grinding disc 42 includes a blade disc 421 and a grinding disc frame 422. The blade disc 421 and the grinding disc frame 422 are detachably connected, thereby facilitating user cleaning of the blade disc 421. The rotating wheel 5 is provided with an internal thread 53, which is sleeved onto the outside of the grinding disc frame 422, which is sleeved onto the outside of the bean grinding chamber 43. The grinding disc frame 422 is provided with an external thread 4221, which is connected to the external thread 4221, thereby achieving a threaded connection between the grinding disc frame 422 and the rotating wheel 5. When the rotating wheel 5 rotates, the grinding disc frame 422 can move up and down, thereby driving the blade disc 4211 to move up and down, achieving the purpose of adjusting the size of the bean grinding gap.

[0049] Specifically, a handle 4211 is provided on the cutter disc 421, and the cutter disc 421 and the grinding disc frame 422 are detachably connected by a snap-on connection. When the cutter disc 421 needs to be cleaned, the cutter disc 421 is pulled upward and rotated by the handle 4211, and the cutter disc 421 is separated from the grinding disc frame 422.

[0050] When the bean grinding device of this embodiment is installed in the coffee machine, the bean box 1 is located on the top cover of the coffee machine. Specifically, the top cover is provided with a through hole. After the bottom of the bean box 1 passes through the through hole, the clamping block 11 is installed in the mounting groove 212. As the bean box 1 rotates, the clamping block 11 is misaligned with the edge of the through hole, so that the clamping block 11 cannot be separated from the through hole, thereby further improving the safety of the entire coffee machine.

[0051] Example 2

[0052] Figure 2 is a cross-sectional view of the bean grinding device of the coffee machine of this embodiment, excluding the bean box; Figure 4 This is a partial exploded diagram of the coffee bean grinding device of this embodiment. Figure 3 and Figure 4 The difference from the first embodiment lies in that the rotating wheel 5 is provided with a rib 6. Rotation of the bean container 1 drives the adjustment ring 2, which in turn drives the rotating wheel 5, causing the rib 6 to abut against the microswitch 31, thereby triggering the microswitch 31 and activating the drive mechanism 43, causing the grinding assembly 4 to begin grinding. The effects of the bean grinding device of this embodiment can be referred to in the first embodiment. Furthermore, the structures of the grinding assembly 4 and the bracket 3 of this embodiment are the same as those of the first embodiment and are not further described here.

[0053] Furthermore, in this embodiment, the adjusting ring 2 has a different structure from that of the first embodiment. It has a mounting groove 212 and a positioning rib 23. The mounting groove 212 is adapted to be mounted on the block 11 in the bean box 1, and the positioning rib 23 is adapted to be mounted on the groove 51 in the rotating wheel 5.

[0054] In this embodiment, the rotating wheel 5 can be configured to have a structure in which the upper and lower portions are of inconsistent size. For example, the lower portion of the rotating wheel 5 can also be configured to have the structure of the limiting ring 22 in Example 1; the rotating wheel 5 can also be configured to have a structure in which the upper and lower portions are of consistent size. The position of the rib 6 on the rotating wheel 5 is not restricted and can be set on the side of the rotating wheel 5 or on the bottom surface of the rotating wheel 5. Preferably, it is set on the side of the rotating wheel 5. The installation direction of the micro switch 31 is adjusted according to the position of the rib 6 on the rotating wheel 5. Its installation method can refer to Example 1.

[0055] In this embodiment, the rib 6 is also configured as an arc segment. The length of the arc segment can be adjusted according to the vertical movement of the grinding disc holder 422, so that the entire arc segment can match the range of the bean coarseness adjustment. Accordingly, in order to facilitate the user to select the desired coarseness, a bean coarseness scale can be provided on the bean box 1.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above-mentioned embodiments only express several implementation methods of the utility model. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several variations and improvements can be made, which all fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. A coffee bean grinding device, characterized in that: include: bean box; an adjusting ring, on which the bean box is detachably mounted; A bracket, wherein a micro switch, a bean grinding chamber, and a powder outlet channel are provided on the bracket, wherein the bean grinding chamber is connected to the powder outlet channel; A grinding assembly comprising a conical cutter, a grinding disc, and a drive mechanism, wherein the conical cutter is fixedly mounted in the bean grinding chamber and electrically connected to the drive mechanism, the grinding disc is detachably mounted in the bean grinding chamber, a grinding gap is formed between the conical cutter and the grinding disc, and the micro switch is electrically connected to the drive mechanism for turning the drive mechanism on and off; A rotating wheel, wherein the outer side of the rotating wheel is connected to the adjusting ring, and the inner side of the rotating wheel is rotatably connected to the grinding disc, so that the grinding disc can move up and down relative to the conical cutter; The adjusting ring or the rotating wheel is provided with ribs, and the rotation of the bean box can drive the adjusting ring to rotate, so that the ribs trigger the micro switch and the driving mechanism starts to work.

2. The coffee bean grinding device according to claim 1, characterized in that: The adjustment ring includes a rotating ring and a limiting ring arranged above and below. The inner diameter of the limiting ring is larger than the inner diameter of the rotating ring. The bean box is detachably mounted on the rotating ring. The rib is arranged on the limiting ring.

3. The coffee bean grinding device according to claim 2, characterized in that: The rotating ring is detachably connected to the limiting ring, and the rotating ring is rotatably connected to the outer side surface of the rotating wheel.

4. The coffee bean grinding device according to claim 3, characterized in that: The rotating ring is provided with a protrusion, the limiting ring is provided with a positioning groove, and the protrusion is clamped in the positioning groove.

5. The coffee bean grinding device according to claim 1, characterized in that: A plurality of grooves are provided on the outer side surface of the upper portion of the rotating wheel, a plurality of positioning ribs are provided on the inner side surface of the adjusting ring, the positioning ribs are clamped in the grooves, and the convex ribs are provided on the lower portion of the rotating wheel.

6. The coffee bean grinding device according to any one of claims 1 to 5, characterized in that: The convex rib is in the form of an arc segment.

7. The coffee bean grinding device according to any one of claims 2 to 4, characterized in that: The rotating wheel is provided with a boss, and the limiting ring is mounted on the boss. When the rotating ring rotates, the limiting ring slides on the boss.

8. The coffee bean grinding device according to claim 6, characterized in that: The bracket is provided with a mounting platform, the micro switch is located on the mounting platform, and the mounting platform is located on one side of the bean grinding chamber.

9. The coffee bean grinding device of claim 2, wherein: The grinding disc includes a cutter disc and a grinding disc frame, the cutter disc is detachably connected to the grinding disc frame, the rotating wheel is provided with an internal thread, the grinding disc frame is built into the rotating wheel, the grinding disc frame is provided with an external thread, and the internal thread is connected to the external thread.

10. The coffee bean grinding device of claim 9, wherein: A handle is provided on the knife disc.

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