Automatic bean-grinding adjusting system and automatic bean-grinding adjusting method

Abstract

An automatic bean-grinding adjusting system and an automatic bean-grinding adjusting method, which are applied to a coffee powder preparation device. The coffee powder preparation device comprises a first grinding cutter (8) and a second grinding cutter (9). The automatic bean-grinding adjusting system comprises a driving device (1), a shaft gear (2) and an adjusting member (3), wherein the adjusting member (3) meshes with the first grinding cutter (8); the shaft gear (2) meshes with the adjusting member (3); and the driving device (1) is connected to the shaft gear (2), and can drive the adjusting member (3) to rotate about an axial direction of the first grinding cutter (8) by means of the shaft gear (2), thereby driving the first grinding cutter (8) to move in a preset direction relative to the second grinding cutter (9). The driving device (1), such as a motor, is basically adjusted in units of turns, and can perform a small-distance fine adjustment on the first grinding cutter (8) after cooperating with the shaft gear (2). In addition, the automatic bean-grinding adjusting system further comprises a transmission gear (4) and an encoder (5), thereby achieving precise monitoring of small-angle rotation of the adjusting member (3).

Description

Automatic bean grinding adjustment system and automatic bean grinding adjustment method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications with application number 202310876023.8, entitled “Automatic Bean Grinding Adjustment System and Automatic Bean Grinding Adjustment Method,” filed with the Patent Office of China on July 17, 2023, patent number 202310871348.7, entitled “Novel Automatic Bean Grinding Adjustment System and Adjustment Method Thereof,” and patent number 202310876006.4, entitled “Automatic Bean Grinding Adjustment System and Adjustment Method Thereof,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of coffee powder preparation, and in particular to an automatic adjustment system and method for grinding beans. Background Art

[0004] At present, with the development of society and the improvement of people's living standards and life quality, coffee, as a beverage, is becoming more and more popular among consumers, and people prefer to grind coffee powder by themselves. However, the grinding coarseness adjustment system of the coffee machine in the existing technology often includes a motor, a flat gear and an adjusting sleeve gear, wherein the adjusting sleeve gear is engaged with one of the first grinding tools, and the flat gear is engaged with the adjusting sleeve gear. The motor can drive the flat gear to rotate, and then drive the adjusting sleeve gear to rotate. Since it is engaged with the tool, it drives the first grinding tool to move in the vertical direction relative to the second tool. It can be seen that the rotation angle of the adjusting sleeve directly corresponds to the moving distance of the first grinding tool, and the two are set in direct proportion. When the motor rotates one circle, the distance it travels is 2×R1×π, so the rotation angle of the adjusting sleeve gear is a=360°×(R1 / R2), where R1 is the radius of the spur gear and R2 is the radius of the adjusting sleeve gear. For example, when R1=20mm and R2=60mm, the rotation angle of the adjusting sleeve gear is a=120°, and the tool will also rotate 120° accordingly, so the tool will move a larger distance. It can be seen that since the motor is basically driven in circles, and the transmission ratio between the spur gear and the adjusting sleeve gear is fed back on the diameter, and rationality and miniaturization design need to be considered, the two can only make large angle adjustments, and cannot make fine adjustments of small angles, and thus cannot make fine adjustments of small distances for the tool.

[0005] Application Contents

[0006] The purpose of this application is to provide an automatic bean grinding adjustment system and an automatic bean grinding adjustment method, which to a certain extent solves the technical problem that the bean grinding coarseness adjustment system of the coffee powder preparation device in the prior art relies on the motor and the flat gear for automatic adjustment, and it is difficult to make fine adjustments to the small distance between the cutters after the two are combined.

[0007] The present application provides an automatic bean grinding adjustment system, which is applied to a coffee powder preparation device, wherein the coffee powder preparation device includes a first grinding tool and a second grinding tool, and the automatic bean grinding adjustment system includes: a driving device, a shaft gear, and an adjustment component;

[0008] The adjusting member is engaged with the first grinding tool and is rotatable around the axis of the first grinding tool; the shaft gear is arranged along a direction perpendicular to the axis of the first grinding tool and is engaged with the adjusting member;

[0009] The driving device is connected to the shaft gear and can drive the adjusting member to rotate around the axis direction of the first grinding tool through the shaft gear, thereby driving the first grinding tool to move relative to the second grinding tool along a preset direction.

[0010] In the above technical solution, further, the adjusting member is annular, and both the inner wall and the outer wall thereof are formed with a plurality of first transmission teeth sequentially arranged along the circumference thereof.

[0011] In any of the above technical solutions, further, a plurality of second transmission teeth are formed on the outer wall of the shaft gear, and mesh with the first transmission teeth on the outer wall of the adjusting member.

[0012] In any of the above technical solutions, further, the automatic bean grinding adjustment system further includes a first support member, the driving device and the shaft gear are both provided on the first support member, and the central axis of the shaft gear is rotatable relative to the first support member.

[0013] In any of the above technical solutions, further, the coffee powder preparation device also includes a bean grinding cylinder, and part of the structure of the first grinding tool extends into the bean grinding cylinder; the first grinding tool forms a limiting portion, the bean grinding cylinder forms a limiting groove extending along the height direction of the grinding cylinder, and the limiting portion can be slidably inserted into the limiting groove.

[0014] In any of the above technical solutions, the automatic bean grinding adjustment system further includes a transmission gear and an encoder; wherein the transmission gear is engaged with the adjustment member, and the transmission gear is used to amplify the rotation angle of the adjustment member;

[0015] The central axis of the transmission gear is connected to the rotating part of the encoder, and the encoder is used to record the rotation angle amplified by the transmission gear.

[0016] In any of the above technical solutions, further, the transmission gear is a spur gear.

[0017] In any of the above technical solutions, further, the transmission gear is a shaft gear.

[0018] In any of the above technical solutions, further, the automatic bean grinding adjustment system further includes a second supporting member, and the central axis of the transmission gear is rotatably disposed on the second supporting member.

[0019] In any of the above technical solutions, further, the automatic bean grinding adjustment system further includes a control device, and the control device is connected to the encoder and the drive device respectively.

[0020] The present application also provides an automatic bean grinding adjustment method, which is applied to the automatic bean grinding adjustment system described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of the automatic bean grinding adjustment system, which will not be described in detail here.

[0021] In the above technical solution, the automatic adjustment method for grinding beans further includes the following steps: the user sets the gear position by himself, the control device compares the set gear position with the initial gear position, and when the set gear position is greater than the initial gear position, the control device controls the driving device to rotate in a preset direction until it is equal to the set gear position; when the set gear position is less than the initial gear position, the control device controls the driving device to rotate in the opposite direction of the preset direction until it is equal to the set gear position.

[0022] In any of the above technical solutions, further, the control device calculates the rotation angle of the adjustment member as 360°|M'-M| / m according to the set gear and the initial gear, wherein the set gear is M', M is the initial gear, and m is the total number of gears;

[0023] The control device controls the driving device to drive the shaft gear to rotate, and the shaft gear synchronously drives the adjusting member to rotate along the preset direction or in the direction opposite to the preset direction, while driving the first grinding tool to move along the height direction of its tool axis. At the same time, the adjusting member synchronously drives the transmission gear to rotate, and the encoder detects and records the rotation angle and feeds it back to the control device. The control device makes a judgment and stops the driving device until the rotation angle of the adjusting member is equal to 360°|M'-M| / m.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The automatic bean grinding adjustment system provided in this application operates as follows: a drive device rotates an adjustment member via a shaft gear. This rotation of the adjustment member simultaneously drives the first grinding tool to move relative to the second grinding tool in a predetermined direction, such as a vertical direction, thereby adjusting the distance between the two tools. As can be seen, the drive device, such as a motor, generally uses rotations as adjustment units. In conjunction with the shaft gear, this enables fine adjustments of the adjustment sleeve and the first grinding tool to be made at small angles, thereby finely adjusting the first grinding tool to small distances.

[0026] In addition, the automatic adjustment system for grinding beans also includes a transmission gear and an encoder, so as to achieve accurate monitoring of small-angle rotation of the adjustment component, thereby realizing the complementary relationship between monitoring and adjustment.

[0027] The automatic bean grinding adjustment method provided in this application is applied to an automatic bean grinding adjustment system. By using this method, precise automatic bean grinding adjustment can be achieved, making the bean grinding adjustment process more intelligent and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1 is a schematic diagram of the structure of an automatic bean grinding adjustment system provided in an embodiment of the present application;

[0030] FIG2 is another schematic diagram of the structure of the automatic bean grinding adjustment system provided in an embodiment of the present application;

[0031] FIG3 is a cross-sectional view of the automatic adjustment system for grinding beans provided in an embodiment of the present application.

[0032] Reference numerals:

[0033] 1-driving device, 2-shaft gear, 3-adjusting member, 4-transmission gear, 5-encoder, 6-first supporting member, 61-supporting base plate, 62-vertical plate, 63-auxiliary mounting plate, 7-second supporting member, 71-U-shaped mounting bracket, 72-connecting plate, 8-first grinding tool, 9-second grinding tool, 10-tool holder, 11-transfer member, 12-grinding cylinder. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0035] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] The following describes the automatic bean grinding adjustment system and the automatic bean grinding adjustment method according to some embodiments of the present application with reference to FIG1 to FIG3 .

[0040] Example 1

[0041] 1 to 3 , an embodiment of the present application provides an automatic bean grinding adjustment system, which is applied to a coffee powder preparation device, such as a coffee bean grinder or a coffee machine with a coffee bean grinding function. The coffee powder preparation device includes a first grinding tool 8 and a second grinding tool 9. The automatic bean grinding adjustment system includes: a drive device 1, a shaft gear 2, and an adjustment member 3;

[0042] The adjusting member 3 is engaged with the first grinding tool 8 and can rotate around the axis of the first grinding tool 8; the shaft gear 2 is arranged along a direction perpendicular to the axis of the first grinding tool 8 and is engaged with the adjusting member 3;

[0043] The driving device 1 is connected to the shaft gear 2 and can drive the adjusting member 3 to rotate around the axis direction of the first grinding tool 8 through the shaft gear 2, thereby driving the first grinding tool 8 to move relative to the second grinding tool 9 along a preset direction.

[0044] Based on the structure described above, it can be seen that the use process of the automatic bean grinding adjustment system provided by this application is as follows: the driving device 1 drives the adjustment member 3 to rotate through the shaft gear 2. While the adjustment member 3 rotates, it drives the first grinding tool 8 to move relative to the second grinding tool 9 along a preset direction, such as the vertical direction, thereby adjusting the distance between the two tools.

[0045] Preferably, the adjusting member 3 rotates one tooth pitch for every rotation of the shaft gear 2, and the rotation angle of the adjusting member 3 for advancing one tooth is c = 360° / n. For example, when n = 80, the driving device 1 rotates one circle, the rotation angle of the adjusting member 3 is c = 360° / 80 = 4.5°, and correspondingly, the first grinding tool 8 can be adjusted to a small distance; when n = 120, the driving device 1 rotates one circle, the rotation angle of the adjusting member 3 is c = 360° / 120 = 3°, and correspondingly, the first grinding tool 8 can be adjusted to a small distance.

[0046] In the prior art, when the motor rotates one circle, the distance it travels is 2×R1×π, thereby adjusting the rotation angle of the sleeve gear to a=360°×(R1 / R2), where R1 is the radius of the spur gear and R2 is the radius of the adjustment sleeve gear (note: the radius of the spur gear is smaller than the radius of the adjustment sleeve). For example, when R1=20mm and R2=60mm, the rotation angle of the adjustment sleeve gear is a=120°, and the tool will also rotate 120°. Correspondingly, the first grinding tool can only be adjusted for a large distance.

[0047] From the above comparison, it can be seen that the driving device 1, such as the motor, basically uses circles as the adjustment unit. After cooperating with the shaft gear 2, it can make fine adjustments to the adjustment sleeve and the first grinding tool 8 at small angles, and then make fine adjustments to the first grinding tool 8 at small distances.

[0048] Note: In this embodiment, preferably, as shown in FIG3 , the first grinding tool 8 is an outer tool, the second grinding tool 9 is an inner tool, and the two are a tapered tool matching structure. The first grinding tool 8 is equipped with a tool sleeve 10, and the first grinding tool 8 is mounted on the tool sleeve 10. The outer sleeve of the tool sleeve 10 is provided with a transfer component 11 and the two are fixedly connected. The transfer component 11 engages with the adjustment component 3 (the first grinding tool 8, the tool sleeve 10, and the transfer component 11 can be separate bodies, or the three or two of them can be integrated. The specific selection is based on actual needs, and they are all existing technologies, so they will not be described in detail here). Of course, this is not limited to the above. The automatic adjustment system for grinding beans is not only limited to the application in a tapered tool structure, but can also be applied to a flat tool structure, that is, the first grinding tool 8 is an upper tool, the second grinding tool 9 is a lower tool, and the upper and lower tools are a flat tool matching structure, and a tool holder is connected above the upper tool, and the adjustment component 3 engages with the tool holder. In addition, the coffee powder preparation device also includes other structures such as a mechanism for driving the inner knife to rotate, etc., which belong to the existing technology and will not be described in detail here.

[0049] In addition, preferably, as shown in Figure 1, the coffee powder preparation device also includes a bean grinding cylinder 12, and part of the structure of the first grinding tool 8 extends into the bean grinding cylinder 12, and preferably, part of the structure of the knife sleeve 10 connected to the first grinding tool 8 extends into the bean grinding cylinder 12; the knife sleeve 10 forms a limiting portion, and the bean grinding cylinder 12 forms a limiting groove extending along the height direction of the grinding cylinder 12, and the limiting portion can be slidably inserted into the limiting groove.

[0050] As can be seen from the structure described above, the limiting portion slides within the limiting groove, thereby limiting the first grinding tool 8 so that it can only move along the height direction of the coffee powder preparation device, that is, the vertical direction, and cannot rotate within a plane perpendicular to the height direction. In this way, the first grinding tool 8 can only move in the vertical direction under the drive of the adjustment member 3. Of course, this part is prior art and will not be described in detail here.

[0051] In this embodiment, preferably, as shown in FIG. 1 and FIG. 2 , the adjusting member 3 is annular, and both the inner wall and the outer wall thereof are formed with a plurality of first transmission teeth sequentially arranged along the circumference thereof.

[0052] According to the structure described above, the adjusting member 3 can be meshed with the adapter member 11 through the transmission teeth on the inner wall, and the adjusting member 3 can be meshed with the adjusting member 3 through the transmission teeth on the outer wall.

[0053] Further, preferably, the first transmission teeth are helical teeth that form an angle with the axial direction of the adjustment member 3 , ie, the vertical direction.

[0054] In this embodiment, preferably, as shown in FIG. 1 and FIG. 2 , a plurality of second transmission teeth are formed on the outer wall of the shaft gear 2 , and mesh with the first transmission teeth on the outer wall of the adjusting member 3 to achieve transmission.

[0055] In this embodiment, preferably, as shown in FIG1 , the automatic bean grinding adjustment system further includes a first support member 6 , the driving device 1 and the shaft gear 2 are both disposed on the first support member 6 , and the central axis of the shaft gear 2 is rotatable relative to the first support member 6 .

[0056] According to the structure described above, it can be seen that the first supporting member 6 plays a role in supporting the driving device 1 and the shaft gear 2 .

[0057] Preferably, as shown in Figure 1 , the first support member 6 includes a support base plate 61 and a plurality of vertical plates 62 disposed on the support base plate 61. The vertical plates 62 are spaced apart and serve to support the central axis of the shaft gear 2, which is capable of rotating relative to the support member. Furthermore, the first support member 6 includes an auxiliary mounting plate 63, which is connected to the support base plate 61 and to which the drive device 1 is connected. Preferably, the auxiliary mounting plate 63 is integrally formed with the connecting plate 72 of the second support member 7, described below.

[0058] In this embodiment, preferably, as shown in FIG1 , the automatic bean grinding adjustment system further includes a transmission gear 4 and an encoder 5 ; wherein the transmission gear 4 is engaged with the adjustment member 3 , and the transmission gear 4 is used to amplify the rotation angle of the adjustment member 3 ;

[0059] The central axis of the transmission gear 4 is connected to the rotating part of the encoder 5 , and the encoder 5 is used to record the rotation angle amplified by the transmission gear 4 .

[0060] According to the structure described above, when the driving device 1 drives the adjusting member 3 to rotate through the shaft gear 2 and causes the first grinding tool 8 to move relative to the second grinding tool 9, it will synchronously drive the transmission gear 4 to rotate. The transmission gear 4 amplifies the rotation angle of the adjusting member 3, and is finally recorded and signaled by the encoder 5 to become a signal that can be read by the device.

[0061] It can be seen that the transmission gear 4 and the encoder 5 can convert the distance of the bean grinder into a rotation angle, and amplify the rotation angle data, thereby converting the unknown distance of the bean grinder into quantitative data, that is, accurately monitoring the small angle rotation of the adjustment member 3.

[0062] In this embodiment, preferably, as shown in FIG1 , the transmission gear 4 is a spur gear, the central axis of which is arranged parallel to the central axis of the adjusting member 3 , that is, both are arranged along the vertical direction.

[0063] Preferably, the pitch of the inner teeth of the adjusting member 3 is A. When the adjusting member 3 rotates one circle (360 degrees), the height of the outer knife moving is A, and when the rotation angle of the adjusting member 3 is B, the height of the outer knife moving is

[0064] Preferably, the diameter of the adjusting member 3 is Y, the diameter of the spur gear is Z, and Y>Z, so the rotation angle of the adjusting member 3 is magnified, and the magnification ratio is When the rotation angle of the adjusting member 3 is B, the rotation angle of the spur gear is Encoder 5 will record the aforementioned

[0065] Preferably, the bean grinding device further comprises a control device, and the control device is respectively connected to the encoder 5 and the drive device 1 for communication. The encoder 5 records the It is converted into an electrical signal and transmitted to the control device. The control device can obtain the gear information in real time, compare it with the gear set by the user, and continuously make adjustments until the gear set by the user is finally reached.

[0066] It can be seen that the automatic adjustment system provided by the present application not only has monitoring but also adjustment functions, and the adjustment is entirely based on small angles, thereby achieving higher adjustment accuracy, that is, achieving precise grinding adjustment.

[0067] In this embodiment, preferably, as shown in FIG. 1 , the automatic bean grinding adjustment system further includes a second support member 7 , and the central axis of the transmission gear 4 , ie, the flat gear, is rotatably disposed on the second support member 7 .

[0068] According to the structure described above, the second supporting member 7 plays the role of supporting the spur gear, and preferably, the second supporting member 7 includes an inverted U-shaped mounting frame 71 and connecting plates 72 on both sides of the mounting frame. The spur gear is mounted on the top of the U-shaped mounting frame 71, and the encoder 5 is arranged in the internal cavity of the U-shaped mounting frame 71, and the encoder 5 can be connected to the U-shaped mounting frame 71 through a fastening member such as a screw or a bolt.

[0069] Example 2

[0070] 1 to 3 , the third embodiment of the present application further provides an automatic adjustment method for grinding beans, which is applied to the automatic adjustment system for grinding beans described in the first embodiment above. Therefore, the method has all the beneficial technical effects of the automatic adjustment system for grinding beans, and the same technical features and beneficial effects are not repeated here.

[0071] In this embodiment, preferably, as shown in FIG1 to FIG3 , the automatic adjustment method for grinding beans includes the following steps:

[0072] The user sets the gear position by himself, and the control device compares the set gear position with the initial gear position. When the set gear position is greater than the initial gear position, the control device controls the driving device 1 to rotate in the preset direction until it is equal to the set gear position. When the set gear position is less than the initial gear position, the control device controls the driving device 1 to rotate in the opposite direction of the preset direction until it is equal to the set gear position.

[0073] The automatic bean grinding adjustment method provided in this application is applied to an automatic bean grinding adjustment system. By using this method, precise automatic bean grinding adjustment can be achieved, making the bean grinding adjustment process more intelligent and convenient.

[0074] Preferably, the control device calculates the rotation angle of the adjustment member 3 as 360°|M'-M| / m according to the set gear and the initial gear, wherein the set gear is M', M is the initial gear, and m is the total number of gears;

[0075] The control device controls the driving device 1 to drive the shaft gear 2 to rotate. The shaft gear 2 synchronously drives the adjusting member 3 to rotate in a preset direction or in a direction opposite to the preset direction, and drives the first grinding tool 8 to move in the height direction of its tool axis. At the same time, the adjusting member 3 synchronously drives the transmission gear 4 to rotate, and the encoder 5 detects and records the rotation angle and feeds it back to the control device. The control device makes a judgment until the rotation angle of the adjusting member 3 is equal to 360°|M'-M| / m, and then stops the driving device 1.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application. Industrial Applicability

[0077] The drive device of the automatic bean grinding adjustment system provided herein, such as a motor, primarily uses rotations as adjustment units. When coupled with a shaft gear, this allows for fine adjustment of the adjustment sleeve and the first grinding tool at small angles, thereby finely adjusting the first grinding tool at small distances. Furthermore, the automatic bean grinding adjustment system includes a transmission gear and an encoder to precisely monitor the small-angle rotation of the adjustment component, thereby achieving a complementary monitoring and adjustment mechanism. The automatic bean grinding adjustment method provided herein, applied to the automatic bean grinding adjustment system, enables precise automatic bean grinding adjustment, making the grinding adjustment process more intelligent and convenient.

Claims

1. An automatic adjustment system for grinding beans, applied to a coffee powder preparation device, wherein the coffee powder preparation device comprises a first grinding tool and a second grinding tool, characterized in that: The automatic adjustment system for grinding beans comprises: a driving device, a shaft gear and an adjustment component; Wherein, the adjusting member is meshed with the first grinding tool and can rotate around the axis of the first grinding tool; the shaft gear is arranged along a direction perpendicular to the axis of the first grinding tool and is meshed with the adjusting member; The driving device is connected to the shaft gear, and can drive the adjusting member to rotate around the axis direction of the first grinding tool through the shaft gear, thereby driving the first grinding tool to move along a preset direction relative to the second grinding tool.

2. The automatic adjustment system for grinding beans according to claim 1, characterized in that: The regulating member is annular, and a plurality of first transmission teeth are sequentially arranged along the circumference of the regulating member on the inner wall and the outer wall thereof.

3. The automatic adjustment system for grinding beans according to claim 2, characterized in that: A plurality of second transmission teeth are formed on the outer wall of the shaft gear and mesh with the first transmission teeth on the outer wall of the adjusting member.

4. The automatic adjustment system for grinding beans according to claim 1, characterized in that: The automatic bean grinding adjustment system further includes a first supporting member, the driving device and the shaft gear are both disposed on the first supporting member, and the central axis of the shaft gear is rotatable and can rotate relative to the first supporting member; and / or The coffee powder preparation device also includes a bean grinding cylinder, and part of the structure of the first grinding tool extends into the bean grinding cylinder; the first grinding tool forms a limiting portion, the bean grinding cylinder forms a limiting groove extending along the height direction of the bean grinding cylinder, and the limiting portion can be slidably inserted into the limiting groove.

5. The automatic adjustment system for grinding beans according to any one of claims 1 to 4, characterized in that: The automatic grinding adjustment system further includes a transmission gear and an encoder; wherein the transmission gear is meshed with the adjustment member, and the transmission gear is used to amplify the rotation angle of the adjustment member; The central axis of the transmission gear is connected to the rotating part of the encoder, and the encoder is used to record the rotation angle amplified by the transmission gear.

6. The automatic adjustment system for grinding beans according to claim 5, characterized in that: The transmission gear is a spur gear.

7. The automatic adjustment system for grinding beans according to claim 5, characterized in that: The automatic bean grinding adjustment system further includes a second supporting member, and the central axis of the transmission gear is rotatably disposed on the second supporting member.

8. The automatic adjustment system for grinding beans according to claim 5, characterized in that: The automatic adjustment system for grinding beans also includes a control device, and the control device is connected to the encoder and the drive device respectively.

9. A method for automatically adjusting bean grinding, characterized in that: The method is applied to the automatic adjustment system for grinding beans as claimed in claim 8, and the automatic adjustment method for grinding beans comprises the following steps: The user sets the gear position by himself, and the control device compares the set gear position with the initial gear position. When the set gear position is greater than the initial gear position, the control device controls the drive device to rotate along a preset direction until it is equal to the set gear position. When the set gear position is less than the initial gear position, the control device controls the drive device to rotate in the opposite direction of the preset direction until it is equal to the set gear position.

10. The automatic adjustment method for grinding beans according to claim 9, characterized in that: The control device calculates the rotation angle of the adjustment member as 360°|M'-M| / m according to the set gear and the initial gear, wherein the set gear is M', M is the initial gear, and m is the total number of gears; The control device controls the driving device to drive the shaft gear to rotate, and the shaft gear synchronously drives the adjusting member to rotate along the preset direction or in the direction opposite to the preset direction, while driving the first grinding tool to move along the height direction of its tool axis. At the same time, the adjusting member synchronously drives the transmission gear to rotate, and the encoder detects and records the rotation angle and feeds it back to the control device. The control device makes a judgment until the rotation angle of the adjusting member is equal to 360°|M'-M| / m, and then stops the driving device.

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