Automatic bean grinding adjustment system and adjustment method therefor

Abstract

An automatic bean grinding adjustment system and an adjustment method therefor. The system comprises: a driving apparatus (1), a first transmission gear (2), an adjustment member (3), a connecting assembly (4), a second transmission gear (5), and an encoder (6). The driving apparatus (1) is connected to the first transmission gear (2), and the first transmission gear (2) is meshed with an outer side wall of the adjustment member (3). A mounting recess is formed on the adjustment member (3), an extension part (124) extending into the mounting recess is formed on a housing (12), and the mounting recess and the extension part (124) are meshed. A cutter shaft (10) of a first cutter extends into the mounting recess, and the cutter shaft (10) is rotatably connected to the adjustment member (3) and the extension part (124) by means of the connecting assembly (4). The cutter shaft (10), by means of the connecting assembly (4), always abuts against a bottom wall of the mounting recess of the adjustment member (3), so that the cutter shaft (10) and the adjustment member (3) synchronously move. The second transmission gear (5) is meshed with the adjustment member (3). A central shaft of the second transmission gear (5) is connected to a rotating part of the encoder (6). The system is not only provided with a monitoring function, but also is provided with an adjustment function, so that a bean grinding process is more controllable.

Description

Automatic bean grinding adjustment system and adjustment method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202310876006.4, filed with the Patent Office of China on July 17, 2023, entitled “Automatic bean grinding adjustment system and adjustment method thereof”, No. 202310871348.7, entitled “Novel automatic bean grinding adjustment system and adjustment method thereof”, No. 202321877670.2, entitled “Blade spacing adjustment mechanism with multi-stage gear drive”, No. 202321866641.6, entitled “Automatic bean grinding adjustment mechanism with novel drive structure”, and No. 202321877234.5, entitled “Automatic bean grinding adjustment system with direct drive structure”, 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 for grinding beans and an adjustment method thereof. Background Art

[0004] Currently, the grinding system in coffee powder preparation equipment often includes two grinding tools, one of which moves vertically relative to the other tool under the action of the drive system, thereby adjusting the distance between the two tools and making the ground coffee powder have different coarseness. However, there is currently a lack of a structure that effectively provides feedback and adjusts the tool movement distance.

[0005] Application Contents

[0006] The purpose of this application is to provide an automatic adjustment system for grinding beans and an adjustment method thereof, which to a certain extent solves the technical problem in the prior art that the grinding system lacks a structure for effective feedback and adjustment of the tool movement distance.

[0007] The present application provides an automatic bean grinding adjustment system, which is applied to a coffee powder preparation device. The coffee powder preparation device includes a housing and a first cutter and a second cutter disposed within the housing. The first cutter is rotatably connected to the housing, and the second cutter is fixedly connected to the housing. The first cutter and the second cutter cooperate with each other.

[0008] The automatic bean grinding adjustment system includes: a driving device, a first transmission gear, an adjustment member, a connecting assembly, a second transmission gear, and an encoder; wherein the output end of the driving device is connected to the first transmission gear, and the first transmission gear is meshed with the outer wall of the adjustment member;

[0009] The adjusting member is formed with a mounting groove, the housing is formed with an extension portion extending into the mounting groove, and the extension portion is engaged with an inner side wall of the mounting groove; the knife shaft of the first cutting tool extends into the mounting groove, the connecting assembly is disposed in the mounting groove, and the knife shaft is rotatably connected to the adjusting member and the extension portion via the connecting assembly, and the knife shaft is always in contact with the bottom wall of the mounting groove of the adjusting member via the connecting assembly, so that the knife shaft and the adjusting member move synchronously;

[0010] The second transmission gear is engaged with the adjusting member, and the second transmission gear is used to amplify the rotation angle of the adjusting member; the central axis of the second transmission gear is connected to the rotating part of the encoder, and the encoder is used to record the rotation angle amplified by the second transmission gear.

[0011] In the above technical solution, further, the connecting assembly includes a bearing, an upper fixing member, a lower fixing member, and an elastic member; wherein the bearing is sleeved on the outside of the cutter shaft, and the rotating portion of the bearing is fixedly connected to the cutter shaft, and the fixed portion of the bearing is fixed via the upper fixing member and the lower fixing member, so that the cutter shaft together with the rotating portion of the bearing can rotate relative to the fixed portion of the bearing;

[0012] One end of the elastic member is connected to the extension portion, and the other end of the elastic member abuts against or is connected to the upper fixing member to apply pressure to the upper fixing member, the bearing and the lower fixing member, so that the lower fixing member always abuts against the inner bottom wall of the mounting groove.

[0013] In any of the above technical solutions, further, the upper fixing member is annular, and is sleeved on the outside of the knife shaft and can move relative to the knife shaft;

[0014] The upper fixing member is formed with a limiting groove penetrating the bottom thereof, and the inner wall of the limiting groove is pressed against at least the top of the fixing portion of the bearing;

[0015] The upper fixing member is formed with a flange portion, and the flange portion extends along the outer periphery of the bottom opening of the limiting groove; one end of the elastic member abuts against or is connected to the flange portion.

[0016] In any of the above technical solutions, further, the top of the lower fixing member is pressed against the bottom of the fixing part of the bearing; the lower fixing member forms an avoidance cavity, part of the structure of the knife shaft extends into the avoidance cavity, and the lower fixing member can move relative to the knife shaft.

[0017] In any of the above technical solutions, further, the cutter shaft forms a limiting step, and the bottom of the limiting step abuts against the top of the rotating portion of the bearing;

[0018] The automatic bean grinding adjustment system further includes a limiting nut threadedly connected to the cutter shaft, and the top of the limiting nut abuts against the bottom of the rotating portion of the bearing.

[0019] In any of the above technical solutions, further, the extension portion includes an inner ring plate, a connecting plate and an outer ring plate connected in sequence to form an annular groove; wherein the outer ring plate extends into the mounting groove and engages with the side wall of the mounting groove; the top of the elastic member extends into the groove and is connected to the bottom wall of the groove.

[0020] In any of the above technical solutions, further, the inner wall of the housing is formed with a stepped reference surface, the outer wall of the second tool is formed with a mounting surface adapted to the reference surface, and the mounting surface is located on the reference surface.

[0021] In any of the above technical solutions, further, the automatic bean grinding adjustment system also includes a first support member arranged on the housing, the driving device and the first transmission gear are both arranged on the first support member, and the central axis of the first transmission gear is rotatable relative to the first support member.

[0022] In any of the above technical solutions, further, the automatic bean grinding adjustment system further includes a second supporting member provided on the housing, and the central axis of the second transmission gear is rotatably provided on the second supporting member.

[0023] In any of the above technical solutions, further, the automatic bean grinding adjustment system further includes a control device, and the control device is communicatively connected to the encoder and the drive device respectively.

[0024] In any of the above technical solutions, further, the first transmission gear is a spur gear or a shaft gear;

[0025] The automatic bean grinding adjustment system further includes a control device, and the control device is communicatively connected to the encoder and the drive device respectively.

[0026] The present application also provides an adjustment method for an automatic bean grinding adjustment system, 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.

[0027] In the above technical solution, further, the adjustment method of the automatic bean grinding adjustment system includes the following steps:

[0028] 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 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.

[0029] 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;

[0030] The control device controls the driving device to drive the first transmission gear to rotate, and the first transmission gear synchronously drives the adjusting member to rotate along the preset direction or in the direction opposite to the preset direction, while driving the adjusting member together with the connecting component and the knife shaft to move along the height direction of the knife shaft. At the same time, the adjusting member synchronously drives the second 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.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] The automatic adjustment system for grinding beans provided by this application not only monitors but also adjusts the grinding process, making the grinding process more controllable. Furthermore, since the structure that drives the outer blade to rise and fall, as in the prior art, is installed at the bottom of the inner blade's shaft, it facilitates installation and maintenance. Furthermore, the outer blade remains stationary while the inner blade rotates and rises, allowing the fixed mounting position of the outer blade and the outer shell to be used as a reference for adjusting the inner blade's distance, thereby facilitating zeroing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] FIG1 is a schematic diagram of the structure of the automatic bean grinding adjustment system provided in Example 1 of the present application;

[0035] FIG2 is a cross-sectional view of the automatic bean grinding adjustment system provided in Example 1 of the present application;

[0036] FIG3 is an enlarged structural diagram of FIG2 at point A;

[0037] FIG4 is a schematic diagram of the structure of the automatic adjustment system for grinding beans provided in Example 2 of the present application.

[0038] Figure markings: 1-driving device, 2-first transmission gear, 3-adjusting member, 4-connecting assembly, 41-bearing, 42-upper fixing member, 421-flanging portion, 43-lower fixing member, 44-elastic member, 45-limiting nut, 5-second transmission gear, 6-encoder, 7-first supporting member, 8-second supporting member, 9-inner knife, 10-knife shaft, 101-limiting step, 11-outer knife, 111-knife sleeve, 12-outer shell, 121-upper shell, 122-lower shell, 123-mounting shell, 1231-first ring plate, 1232-connecting ring plate, 1233-second ring plate, 124-extension portion, 1241-inner ring plate, 1242-connecting plate, 1243-outer ring plate. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The following describes the automatic bean grinding adjustment system and adjustment method thereof according to some embodiments of the present application with reference to FIG. 1 to FIG. 4 .

[0045] Example 1

[0046] 1 to 3 , an embodiment of the present application provides an automatic adjustment system for grinding beans, which is applied to a coffee powder preparation device such as a bean grinder or a coffee machine with a bean grinding function. The coffee powder preparation device includes a housing 12 and a first cutter, i.e., an inner cutter 9, and a second cutter, i.e., an outer cutter 11, disposed in the housing 12. The inner cutter 9 is rotatably connected to the housing 12, and the outer cutter 11 is fixedly connected to the housing 12. The inner cutter 9 and the outer cutter 11 cooperate with each other (note: the inner cutter 9 and the outer cutter 11 are a conical cutter cooperation structure in the prior art, which will be described as an example hereinafter. Of course, the present invention is not limited thereto. The first cutter may also be a lower cutter, and the second cutter may also be an upper cutter, i.e., a flat cutter cooperation structure is also possible, and the selection is based on actual needs);

[0047] The automatic grinding adjustment system includes: a drive device 1, a first transmission gear 2, an adjustment member 3, a connecting assembly 4, a second transmission gear 5, and an encoder 6. The output end of the drive device 1 is connected to the first transmission gear 2, and the first transmission gear 2 is meshed with the outer wall of the adjustment member 3.

[0048] The adjusting member 3 is formed with a mounting groove, and the outer shell 12 is formed with an extension portion 124 extending into the mounting groove, and the extension portion 124 is engaged with the inner side wall of the mounting groove. It can be seen that the inner wall and the outer wall of the adjusting member 3 are both provided with transmission teeth; the blade shaft 10 of the inner blade 9 passes through the bottom of the outer shell 12 and extends into the mounting groove, the connecting component 4 is provided in the mounting groove, and the blade shaft 10 is rotatably connected to the adjusting member 3 and the extension portion 124 through the connecting component 4, and the blade shaft 10 is always in contact with the bottom wall of the mounting groove of the adjusting member 3 through the connecting component 4, so that the blade shaft 10 and the adjusting member 3 move synchronously, that is, under the action of the connecting component 4, the blade shaft 10 can move synchronously with the adjusting member 3 and can rotate freely relative to the adjusting member 3;

[0049] The second transmission gear 5 is engaged with the adjusting member 3, and the second transmission gear 5 is used to amplify the rotation angle of the adjusting member 3; the central axis of the second transmission gear 5 is connected to the rotating part of the encoder 6, and the encoder 6 is used to record the rotation angle amplified by the second transmission gear 5.

[0050] Based on the structure described above, it can be known that the driving device 1 drives the adjusting member 3 to rotate along the preset direction through the first transmission gear 2. Since the adjusting member 3 is engaged with the extension portion 124 of the outer shell 12, the extension portion 124 of the outer shell 12 is driven to rotate. However, since the outer shell 12 and its extension portion 124 are fixed, the adjusting member 3 is forced to move along the height direction of the blade shaft 10 while rotating, and since the blade shaft 10 moves synchronously with the adjusting member 3 through the connecting component 4, the distance between the inner blade 9 and the outer blade 11 on the blade shaft 10 is adjusted, thereby achieving the adjustment of the coarseness of the coffee powder.

[0051] Moreover, the user can set 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 along 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. Specifically, the control device calculates the rotation angle of the adjusting member 3 as 360°|M'-M| / m based on the set gear position and the initial gear position, where the set gear position is M', M is the initial gear position, and m is the total number of gears.

[0052] Combined with the above-mentioned adjustment method, the specific steps are as follows: the control device controls the driving device 1 to drive the first transmission gear 2 to rotate, and the first transmission gear 2 synchronously drives the adjusting member 3 to rotate along the preset direction or in the opposite direction to the preset direction, while driving the adjusting member 3 together with the connecting component 4 and the knife shaft 10 to move along the height direction of the knife shaft 10. At the same time, the adjusting member 3 synchronously drives the second transmission gear 5 to rotate, and the encoder 6 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 stops the driving device 1.

[0053] It can be seen that the automatic adjustment system for grinding beans provided by the present application not only has the function of monitoring, but also has the function of adjustment, making the grinding process more controllable. In addition, since the structure for driving the outer knife 11 to rise and fall in the prior art is installed at the bottom of the knife shaft 10 of the inner knife 9, it is easy to install and maintain. In addition, the outer knife 11 remains stationary, and the inner knife 9 rotates and rises (note that the motor that drives the rotation of the inner knife 9 is a separately set structure, not the aforementioned drive device 1, and the structure such as the motor that drives the rotation of the inner knife 9 is prior art and will not be described in detail here). Therefore, the fixed installation position of the outer knife 11 and the outer shell 12 can be used as a reference to adjust the knife distance of the inner knife 9, thereby facilitating the zero operation.

[0054] Furthermore, preferably, the inner wall of the outer shell 12 is formed with a stepped reference surface, the outer wall of the outer knife 11 is formed with a mounting surface adapted to the reference surface, and the mounting surface is located on the reference surface to serve as the mounting position of the outer knife 11 and the outer shell 12. During the zeroing process, the position of the inner knife 9 can be adjusted based on the surface of the stepped reference surface perpendicular to the direction of the knife axis 10, that is, the horizontal reference surface, and the outer knife 11 can be installed based on the entire reference surface.

[0055] On this basis, preferably, as shown in Figure 2, the shell 12 includes an upper shell 121, a lower shell 122 and a mounting shell 123; wherein the upper shell 121 is a structure with a hollow interior and open top and bottom, the lower shell 122 is connected to the upper shell 121 by bolts, and a transmission gear for driving the knife shaft 10 to rotate, that is, to grind, is installed in the lower shell 122 (this part is the existing technology and will not be described in detail here), and the inner knife 9 and the outer knife 11 are both arranged in the upper shell 121, and correspondingly, the upper shell 121 is provided with a first mounting hole, and the knife shaft 10 of the inner knife 9 is rotatably inserted into this first mounting hole through a bearing 41, and preferably, the lower shell 122 is formed with a second mounting hole, and the edge of this second mounting hole is formed with the aforementioned extension portion 124, and the second mounting hole is mainly used to avoid the knife shaft 10;

[0056] The mounting housing 123 includes a first ring plate 1231, a connecting ring plate 1232, and a second ring plate 1233, which are connected in sequence. The first ring plate 1231 and the second ring plate 1233 both extend along the height direction of the coffee powder preparation device, and the connecting ring plate 1232 extends perpendicular to the height direction of the coffee powder preparation device. The diameter of the first ring plate 1231 is greater than the diameter of the second ring plate 1233, thus forming a stepped shape, thereby forming a stepped reference surface.

[0057] The coffee powder preparation device also includes a blade housing 111, to which the outer blade 11 is fixed. The outer wall of the blade housing 111 is adapted to fit within the inner wall of the mounting housing 123, and the blade housing 111 is positioned on the step of the mounting housing 123. The blade housing 111 can be secured to the mounting housing 123 via a fastening member. Note that the outer blade 11 and blade housing 111 can be either integral or separate.

[0058] In this embodiment, preferably, as shown in FIG3 , the connecting assembly 4 includes a bearing 41, an upper fixing member 42, a lower fixing member 43, and an elastic member 44; wherein the bearing 41 is sleeved on the outside of the cutter shaft 10, and the rotating portion of the bearing 41 is fixedly connected to the cutter shaft 10, and the fixed portion of the bearing 41 is fixed via the upper fixing member 42 and the lower fixing member 43, so that the cutter shaft 10 and the rotating portion of the bearing 41 can rotate relative to the fixed portion of the bearing 41;

[0059] One end of the elastic member 44 is connected to the extension portion 124, and the other end of the elastic member 44 abuts or is connected to the upper fixing member 42 to apply pressure to the upper fixing member 42, the bearing 41 and the lower fixing member 43, so that the lower fixing member 43 always abuts against the inner bottom wall of the installation groove.

[0060] According to the structure described above, when the driving device 1 drives the adjusting member 3 to rotate through the first transmission gear 2, since the extension portion 124 engaged with the adjusting member 3 remains stationary, the adjusting member 3 can only move along the height direction of the coffee powder preparation device, that is, the vertical direction, and since the elastic member 44 can always push the upper bearing 41 fixing member, the fixing portion of the bearing 41, and the lower bearing 41 fixing member downward in sequence, and finally make the bottom of the lower bearing 41 fixing member always tightly against the bottom wall of the mounting groove of the adjusting member 3, when the adjusting member 3 moves, it can synchronously drive the above-mentioned components together with the knife shaft 10 to move up and down, but at the same time does not affect the rotation of the knife shaft 10, and at the same time the knife shaft 10 moves, it drives the inner knife 9 thereon to move, thereby adjusting the distance between the two knives, that is, adjusting the knife distance, and then realizing the adjustment of the coarseness of the grinding.

[0061] Furthermore, since the outer blade 11 remains stationary, the fixed installation position of the outer blade 11 and the housing 12 can be used as a reference. The inner blade 9 adjustment device can be used to adjust the distance between the inner blade 9 and the reference, thereby determining the position of the inner blade 9. The outer blade 11 can then be installed based on the fixed reference, thereby ensuring that the outer blade 11 and the inner blade 9 are zeroed before shipment, thereby ensuring the grinding accuracy.

[0062] In addition, preferably, the blade shaft 10 is processed by CNC, and its own axial and radial accuracy can almost reach 0.01mm or even 0.005mm. Therefore, installing the above-mentioned adjustment structure on the blade shaft 10 greatly improves the assembly accuracy, further ensures the grinding accuracy, and avoids the cumulative error caused by assembly in the existing technology.

[0063] In this embodiment, preferably, as shown in FIG. 3 , since the bearing 41 is annular, the upper fixing member 42 is also designed to be annular, and is sleeved on the outside of the cutter shaft 10 and can move relative to the cutter shaft 10 .

[0064] Furthermore, preferably, as shown in FIG3 , the upper fixing member 42 is formed with a limiting groove running through the bottom thereof, the bearing 41 is arranged in the mounting groove, and the inner wall of the limiting groove is pressed against the top and side of the fixing portion of the bearing 41 , and in addition, the top of the lower fixing member 43 is pressed against the bottom of the fixing portion of the bearing 41 , thereby achieving the pressing and fixing of the fixing portion of the bearing 41 .

[0065] In this embodiment, preferably, as shown in FIG3 , the upper fixing member 42 is formed with a flange portion 421 , and the flange portion 421 extends along the periphery of the bottom opening of the limiting groove; one end of the elastic member 44 abuts against or is connected to the flange portion 421 .

[0066] According to the structure described above, the flange portion 421 provides a force-applying surface for the elastic member 44, so as to ensure that the elastic member 44 can always push the upper bearing 41 fixing member, the bearing 41, and the lower bearing 41 fixing member in sequence to have a tendency to move downward, and finally make the bottom of the lower bearing 41 fixing member always tightly against the bottom wall of the mounting groove of the adjusting member 3, so that the adjusting member 3 can move while synchronously driving the knife shaft 10 and the inner knife 9 to move synchronously.

[0067] In this embodiment, preferably, as shown in FIG. 3 , the lower fixing member 43 is formed with an avoidance cavity, a portion of the structure of the blade shaft 10 extends into the avoidance cavity, and the lower fixing member 43 is movable relative to the blade shaft 10 .

[0068] According to the structure described above, the avoidance cavity can avoid the bottom of the cutter shaft 10 to avoid interference and ensure the normal rotation of the cutter shaft 10.

[0069] Furthermore, preferably, along the height direction of the blade shaft 10 , the cross section of the lower fixing member 43 is U-shaped, and the outer peripheral edge of the opening thereof can just press the bottom of the fixing portion of the bearing 41 .

[0070] In this embodiment, preferably, as shown in FIG3 , the cutter shaft 10 forms a limiting step 101 , and the bottom of the limiting step 101 abuts against the top of the rotating portion of the bearing 41 ;

[0071] The automatic bean grinding adjustment system further includes a limiting nut 45 threadedly connected to the blade shaft 10 , and the top of the limiting nut 45 abuts against the bottom of the rotating portion of the bearing 41 .

[0072] Based on the structure described above, it can be known that the limiting step 101 and the limiting nut 45 serve to connect and fix the rotating part of the bearing 41 to the knife shaft 10.

[0073] In this embodiment, as shown in FIG3 , the extension portion 124 preferably includes an inner ring plate 1241, a connecting plate 1242, and an outer ring plate 1243, which are sequentially connected to form an annular groove. The top of the elastic member 44 extends into the groove and connects to the bottom wall of the groove. The outer ring plate 1243 extends into the mounting groove and engages with the sidewalls of the mounting groove. Thus, the extension portion 124 having the above structure not only satisfies the sidewalls of the mounting groove but also provides a mounting position for the elastic member 44.

[0074] Furthermore, preferably, the inner ring plate 1241 , the connecting plate 1242 and the outer ring plate 1243 are an integral structure with the outer shell 12 .

[0075] In this embodiment, preferably, as shown in FIG1 , the first transmission gear 2 is a spur gear.

[0076] In this embodiment, preferably, as shown in FIG1 , the automatic bean grinding adjustment system further includes a first support member 7 disposed on the housing 12 , the drive device 1 and the first transmission gear 2 are both disposed on the first support member 7 , and the center axis of the first transmission gear 2, i.e., the flat gear, can rotate relative to the first support member 7 . It can be seen that the first support member 7 serves to support the drive device 1 and the first transmission gear 2 .

[0077] Among them, preferably, the first supporting member 7 is a stepped plate, and the driving device 1 is arranged below it, and the first transmission gear 2, that is, the flat gear is arranged above it. The first supporting member 7 is formed with a through hole passing through its top and bottom, and the top of the output shaft of the driving device 1 is inserted into the center hole of the first transmission gear 2 through this through hole.

[0078] Among them, preferably, the first supporting member 7 and the housing 12 can be integrated or can be a separate structure, which can be selected according to actual needs. When the two are separate structures, the two can be connected by a fastening member such as a bolt.

[0079] In this embodiment, preferably, as shown in FIG1 , the automatic bean grinding adjustment system further includes a second support member 8 disposed on the housing 12 , and the central axis of the second transmission gear 5 is rotatably disposed on the second support member 8 . It can be seen that the second support member 8 serves to support the spur gear.

[0080] Among them, preferably, the second supporting member 8 includes an inverted U-shaped mounting frame and connecting plates 1242 on both sides of the mounting frame, the flat gear is installed on the top of the U-shaped mounting frame, the encoder 6 is arranged in the internal cavity of the U-shaped mounting frame, and the encoder 6 can be connected to the U-shaped mounting frame through a fastening member such as a screw or bolt; the center axis of the flat gear passes through the top of the U-shaped mounting frame and is connected to the rotating part of the encoder 6 below.

[0081] Among them, preferably, the second supporting member 8 and the housing 12 can be integrated or can be a separate structure, which can be selected according to actual needs. When the two are separate structures, the two can be connected by a fastening member such as a bolt.

[0082] In this embodiment, preferably, as shown in FIG1 , the second transmission gear 5 is a flat gear, the diameter of the adjustment member 3 is Y, the diameter of the second transmission gear 5 is Z, and Y>Z, so the rotation angle of the adjustment 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 6 will record the aforementioned

[0083] Example 2

[0084] As shown in FIG4 , the automatic adjustment system for grinding beans in this embodiment is an improvement on the first embodiment. The technical contents disclosed in the first embodiment will not be described repeatedly, and the contents disclosed in the first embodiment also belong to the contents disclosed in this embodiment.

[0085] The improvement of the second embodiment relative to the first embodiment is that the first transmission gear 2 is changed from a flat gear to a shaft gear. For every rotation of the shaft gear, the adjusting member 3 will rotate one tooth pitch, and the rotation angle of the adjusting member 3 moving one tooth is c = 360° / n. For example, when n = 80, the driving device 1 rotates one circle, and the rotation angle of the adjusting member 3 is c = 360° / 80 = 4.5; when n = 120, the driving device 1 rotates one circle, and the rotation angle of the adjusting member 3 is c = 360° / 120 = 3°. Since the rotation angle is proportional to the moving distance of the inner knife 9, the inner knife 9 can be adjusted by a small distance.

[0086] As for the spur gear, when the driving device 1 rotates one circle, the distance traveled by the spur gear is 2×R1×π, so the rotation angle a of the adjusting member 3 is = 360°×(R1 / R2), wherein 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 a of the adjusting member 3 is = 120°, and correspondingly, the inner knife 9 can only be adjusted over a large distance.

[0087] By comparison, it can be seen that the driving device 1, such as a motor, basically uses circles as adjustment units. After cooperating with the shaft gear, it can make fine adjustments to the adjustment component 3 at small angles, and then make fine adjustments to the inner knife 9 at small distances.

[0088] Furthermore, the first support member 7 includes a support base and multiple vertical plates mounted on the support base. The vertical plates are spaced apart and support the central axis of the shaft gear, which is capable of rotating relative to the support member. Furthermore, the first support member 7 includes an auxiliary mounting plate, which is connected to the support base and to which the drive device 1 is connected. Preferably, the auxiliary mounting plate is integrally formed with the connecting plate 1242 of the second support member 8, described below.

[0089] Example 3

[0090] Embodiment 4 of the present application further provides an adjustment method for an automatic bean grinding adjustment system, which is applied to the above-mentioned embodiment 2 or the automatic bean grinding adjustment system described in embodiment 2. Therefore, it has all the beneficial technical effects of the automatic bean grinding adjustment system, and the same technical features and beneficial effects are not repeated here.

[0091] In this embodiment, preferably, the adjustment method of the automatic bean grinding adjustment system includes the following steps:

[0092] 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.

[0093] As can be seen from the above description, applying this method to the aforementioned automatic adjustment system for grinding beans can achieve automatic detection and automatic adjustment.

[0094] In combination with the above, and referring to Figures 1 to 4, the detailed steps of this adjustment method are as follows:

[0095] The control device calculates the rotation angle of the adjustment member 3 as 360°|M'-M| / m based on the set gear position and the initial gear position, where the set gear position is M', M is the initial gear position, and m is the total number of gears (note: the number of gears is proportional to the tool pitch. The larger the number of gears, the larger the tool pitch, and the smaller the number of gears, the smaller the tool pitch).

[0096] The control device controls the driving device 1 to drive the first transmission gear 2 to rotate, and the first transmission gear 2 synchronously drives the adjusting member 3 to rotate along the preset direction or in the opposite direction to the preset direction (that is, when adjusting from a large gear to a small gear, it rotates along the preset direction to reduce the tool pitch, that is, to reduce the gear; when adjusting from a small gear to a large gear, it rotates in the opposite direction of the preset direction to increase the tool pitch, that is, to increase the gear). At the same time, the adjusting member 3 is driven together with the knife shaft 10 to move along the height direction of the knife shaft 10. At the same time, the adjusting member 3 synchronously drives the second transmission gear 5 to rotate, and the encoder 6 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 stops the driving device 1.

[0097] 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

[0098] The automatic adjustment system for grinding beans provided by this application not only monitors but also adjusts the grinding process, making the grinding process more controllable. Furthermore, since the structure that drives the outer blade to rise and fall, as in the prior art, is installed at the bottom of the inner blade's shaft, it facilitates installation and maintenance. Furthermore, the outer blade remains stationary while the inner blade rotates and rises, allowing the fixed mounting position of the outer blade and the outer shell to be used as a reference for adjusting the inner blade's distance, thereby facilitating zeroing operations.

Claims

1. An automatic adjustment system for grinding beans, applied to a coffee powder preparation device, the coffee powder preparation device comprising a housing and a first cutter and a second cutter arranged in the housing, wherein the first cutter is rotatably connected to the housing, the second cutter is fixedly connected to the housing, and the first cutter and the second cutter cooperate, characterized in that: The automatic adjustment system for grinding beans comprises: a driving device, a first transmission gear, an adjustment member, a connecting assembly, a second transmission gear and an encoder; wherein the output end of the driving device is connected to the first transmission gear, and the first transmission gear is meshed with the outer wall of the adjustment member; The adjusting member is formed with a mounting groove, the housing is formed with an extension portion extending into the mounting groove, and the extension portion is meshed with an inner side wall of the mounting groove; the knife shaft of the first tool extends into the mounting groove, the connecting assembly is arranged in the mounting groove, and the knife shaft is rotatably connected with the adjusting member and the extension portion through the connecting assembly, and the knife shaft is always in contact with the bottom wall of the mounting groove of the adjusting member through the connecting assembly, so that the knife shaft and the adjusting member move synchronously; The second transmission gear is meshed with the adjusting member, and the second transmission gear is used to amplify the rotation angle of the adjusting member; the central axis of the second transmission gear is connected to the rotating part of the encoder, and the encoder is used to record the rotation angle amplified by the second transmission gear.

2. The automatic adjustment system for grinding beans according to claim 1, characterized in that: The connecting assembly includes a bearing, an upper fixing member, a lower fixing member and an elastic member; wherein the bearing is sleeved on the outside of the knife shaft, and the rotating part of the bearing is fixedly connected to the knife shaft, and the fixed part of the bearing is fixed via the upper fixing member and the lower fixing member, so that the knife shaft together with the rotating part of the bearing can rotate relative to the fixed part of the bearing; One end of the elastic member is connected to the extension portion, and the other end of the elastic member abuts against or is connected to the upper fixing member to apply pressure to the upper fixing member, the bearing and the lower fixing member, so that the lower fixing member always abuts against the inner bottom wall of the mounting groove.

3. The automatic adjustment system for grinding beans according to claim 2, characterized in that: The upper fixing member is annular and is sleeved on the outside of the knife shaft and can move relative to the knife shaft; The upper fixing member is formed with a limiting groove penetrating the bottom thereof, and the inner wall of the limiting groove is at least pressed against the top of the fixing portion of the bearing; The upper fixing member is formed with a flange portion, and the flange portion extends along the outer periphery of the bottom opening of the limiting groove; one end of the elastic member abuts against or is connected to the flange portion.

4. The automatic adjustment system for grinding beans according to claim 2, characterized in that: The top of the lower fixing member is pressed against the bottom of the fixing portion of the bearing; the lower fixing member is formed with an avoidance cavity, a part of the structure of the knife shaft extends into the avoidance cavity, and the lower fixing member can move relative to the knife shaft; and / or The knife shaft forms a limiting step, and the bottom of the limiting step abuts against the top of the rotating part of the bearing; The automatic adjustment system for grinding beans further comprises a limiting nut threadably connected to the knife shaft, and the top of the limiting nut abuts against the bottom of the rotating portion of the bearing.

5. The automatic adjustment system for grinding beans according to claim 2, characterized in that: The extension portion includes an inner ring plate, a connecting plate and an outer ring plate connected in sequence to form an annular groove; wherein the outer ring plate extends into the mounting groove and engages with the side wall of the mounting groove; the top of the elastic member extends into the groove and is connected to the bottom wall of the groove.

6. The automatic adjustment system for grinding beans according to claim 1, characterized in that: The inner wall of the housing is formed with a stepped reference surface, the outer wall of the second tool is formed with a mounting surface matched with the reference surface, and the mounting surface is seated on the reference surface.

7. 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 disposed on the housing, the driving device and the first transmission gear are both disposed on the first supporting member, and a central axis of the first transmission gear is rotatable relative to the first supporting member; and / or The automatic bean grinding adjustment system further includes a second supporting member disposed on the housing, and a central axis of the second transmission gear is rotatably disposed on the second supporting member.

8. The automatic adjustment system for grinding beans according to any one of claims 1 to 7, characterized in that: The automatic adjustment system for grinding beans also includes a control device, and the control device is communicatively connected with the encoder and the drive device respectively.

9. The automatic adjustment system for grinding beans according to claim 8, characterized in that: The first transmission gear is a spur gear or a shaft gear; The automatic adjustment system for grinding beans also includes a control device, and the control device is communicatively connected with the encoder and the drive device respectively.

10. A method for adjusting an automatic adjustment system for grinding beans, characterized in that: Applied to the automatic adjustment system for grinding beans as claimed in claim 9, the adjustment method of the automatic adjustment system 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.

11. The method for adjusting the automatic adjustment system for grinding beans according to claim 10, 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 first transmission gear to rotate. The first transmission gear synchronously drives the adjusting member to rotate along the preset direction or in the direction opposite to the preset direction, and drives the adjusting member together with the connecting component and the knife shaft to move along the height direction of the knife shaft. At the same time, the adjusting member synchronously drives the second 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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