New automatic bean-grinding adjusting system and adjusting method thereof

Abstract

A new automatic bean-grinding adjusting system and an adjusting method thereof. The new automatic bean-grinding adjusting system comprises a driving device (6), a first transmission gear (7), an adjusting member (8), a first fixing member (10), a second fixing member (12), a bearing (9), a second transmission gear (13) and an encoder (14), wherein the driving device (6) drives the adjusting member (8) to rotate by means of the first transmission gear (7); the first transmission gear (7) meshes with an outer side wall of the adjusting member (8); the adjusting member (8) is provided with an accommodating cavity having an opening, a cutter shaft (2) of the first cutter passes through a housing (5) and the opening and extends into the accommodating cavity of the adjusting member (8), a rotating portion of the bearing (9) is connected to the cutter shaft (2), and the fixing portion of the bearing (9) is fixed by means of the first fixing member (10) and the second fixing member (12); in a height direction of the cutter shaft (2), the adjusting member (8) is stationary relative to the housing (5); the first fixing member (10) meshes with the adjusting member (8), and the first fixing member (10) is slidably connected to the housing (5); the second transmission gear (13) meshes with the adjusting member (8); and a central shaft of the second transmission gear (13) is connected to a rotating portion of the encoder (14).

Description

New automatic adjustment system for grinding beans and adjustment method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202310871348.7, filed with the Patent Office of China on July 17, 2023, entitled “Novel automatic bean grinding adjustment system and adjustment method thereof”, No. 202321877234.5, entitled “Automatic bean grinding adjustment system with direct drive structure”, No. 202310876006.4, entitled “Automatic bean grinding adjustment system and adjustment method thereof”, and No. 202321877678.9, entitled “Blade spacing adjustment mechanism with novel multi-stage gear drive”, 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 a novel automatic adjustment system for grinding beans and an adjustment method thereof. Background Art

[0004] Currently, the bean 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 a new automatic adjustment system for bean grinding and an adjustment method thereof, which to a certain extent solves the technical problem in the prior art that the bean grinding system coffee bean grinder lacks a structure for effective feedback and adjustment of the tool movement distance.

[0007] The present application provides a novel 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 in the housing and cooperating with each other, wherein the first cutter is rotatably connected to the housing, and the second cutter is fixedly connected to the housing. The novel automatic bean grinding adjustment system includes: a drive device, a first transmission gear, an adjustment member, a first fixing member, a second fixing member, a bearing, a second transmission gear, and an encoder.

[0008] Wherein, the output end of the driving device is connected to the first transmission gear, and the first transmission gear is engaged with the outer side wall of the adjusting member;

[0009] The adjusting member forms an accommodating cavity with an opening, and the first fixing member, the second fixing member, and the bearing are all disposed in the accommodating cavity; the blade shaft of the first cutting tool extends through the housing and the opening into the accommodating cavity, and the rotating portion of the bearing is connected to the blade shaft, and the fixed portion of the bearing is pressed and fixed by the first fixing member and the second fixing member;

[0010] The adjusting member is fixed relative to the housing along the height direction of the blade shaft; the first fixing member is engaged with the adjusting member; the first fixing member is slidably connected to the housing along the height direction of the blade shaft, and the two are fixedly connected along the height direction perpendicular to the blade shaft;

[0011] 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.

[0012] In the above technical solution, the automatic bean grinding adjustment system further includes a first bracket disposed on the housing, the driving device and the first transmission gear are both disposed on the first bracket, and a central axis of the first transmission gear is rotatable relative to the first bracket;

[0013] An installation space is formed between the first bracket and the housing along the height direction of the blade shaft, and the adjusting member is fixed in the installation space.

[0014] In any of the above technical solutions, further, the automatic bean grinding adjustment system further includes a second bracket disposed on the housing, and the central axis of the second transmission gear is rotatably disposed on the second bracket.

[0015] In any of the above technical solutions, further, the first transmission gear is a shaft gear or a spur gear.

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

[0017] In any of the above technical solutions, further, a bottom of the housing along its height direction is formed with a passage, and a guide housing is formed around the passage, a portion of the structure of the first fixing member extends into the guide housing and is movable relative to the guide housing; an outer side wall of the first fixing member is engaged with an inner wall of the accommodating cavity;

[0018] The first fixing member is formed with a guide groove, and a partial structure of the guide housing is inserted into the guide groove.

[0019] In any of the above technical solutions, further, the first fixing member is formed with a mounting groove penetrating the bottom thereof and a through hole penetrating the top thereof, and the through hole is connected to the mounting groove;

[0020] The bearing is arranged in the installation groove, and the bottom wall of the installation groove presses the top of the fixing portion of the bearing;

[0021] The second fixing member is disposed in the installation groove and is threadedly connected to an inner wall of the installation groove. The top of the second fixing member presses the bottom of the fixing portion of the bearing.

[0022] 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 part of the bearing;

[0023] The novel automatic adjustment system for grinding beans 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.

[0024] 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.

[0025] In any of the above technical solutions, further, the housing is formed with a limiting groove extending along the height direction of the knife shaft, the first fixing member is formed with a limiting portion, and the limiting portion is slidably inserted into the limiting groove.

[0026] 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.

[0027] The present application also provides a novel adjustment method for an automatic bean grinding adjustment system, which is applied to the novel automatic bean grinding adjustment system described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of the novel automatic bean grinding adjustment system, which will not be described in detail here.

[0028] In the above technical solution, further, the adjustment method of the novel automatic bean grinding adjustment system includes the following steps:

[0029] 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.

[0030] 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;

[0031] 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, and the adjusting member synchronously drives the first fixing member to move the knife shaft 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 and stops the driving device until the rotation angle of the adjusting member is equal to 360°|M'-M| / m.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] The automatic adjustment system for grinding beans provided by this application not only has monitoring but also adjustment functions, making the grinding process more controllable. In addition, the outer knife remains stationary, while the inner knife can rotate freely. The inner knife can be raised and lowered using components such as an adjustable member, a first fixing member, a second fixing member, and a bearing. Therefore, the fixed installation position of the outer knife and the outer shell can be used as a reference to adjust the distance between the inner knife and the outer knife, thereby facilitating zero operation. In addition, because the structure that drives the outer knife to rise and fall in the prior art is installed at the bottom of the inner knife's knife shaft, it is easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to 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 any creative work.

[0035] FIG1 is a schematic structural diagram of a novel automatic bean grinding adjustment system provided in an embodiment of the present application;

[0036] FIG2 is another schematic diagram of the structure of the novel automatic bean grinding adjustment system provided in an embodiment of the present application;

[0037] FIG3 is a cross-sectional view of a novel automatic bean grinding adjustment system provided in an embodiment of the present application;

[0038] FIG4 is an enlarged structural diagram of point A in FIG3 .

[0039] Figure markings: 1-inner knife, 2-knife shaft, 21-limiting step, 3-outer knife, 4-knife sleeve, 5-outer shell, 51-upper shell, 52-lower shell, 53-mounting shell, 531-first ring plate, 532-connecting ring plate, 533-second ring plate, 54-guide shell, 6-driving device, 7-first transmission gear, 8-adjusting member, 9-bearing, 10-first fixing member, 101-guide groove, 11-limiting nut, 12-second fixing member, 13-second transmission gear, 14-encoder, 15-second bracket, 16-first bracket, 161-support base plate, 162-vertical plate, 163-auxiliary mounting plate. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The following describes a novel 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 .

[0046] Example 1

[0047] 1 to 4 , an embodiment of the present application provides a novel 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 5 and a first cutter and a second cutter disposed in the housing 5 and cooperating with each other. The first cutter is rotatably connected to the housing 5, and the second cutter is fixedly connected to the housing 5. (Note: the inner cutter 1 and the outer cutter 3 are a conical cutter matching structure in the prior art, which will be described below as an example. Of course, the present invention is not limited to this. The first cutter can also be a lower cutter and the second cutter can also be an upper cutter, that is, the two can also be a flat cutter matching structure. The specific selection is based on actual needs.)

[0048] The new automatic adjustment system for grinding beans includes: a driving device 6, a first transmission gear 7, an adjustment member 8, a first fixing member 10, a second fixing member 12, a bearing 9, a second transmission gear 13, and an encoder 14;

[0049] The output end of the driving device 6 is connected to the first transmission gear 7, and the first transmission gear 7 is meshed with the outer wall of the adjusting member 8;

[0050] The adjusting member 8 forms an open accommodating cavity, in which the first fixing member 10, the second fixing member 12, and the bearing 9 are all disposed. The blade shaft 2 of the inner blade 1 extends through the housing 5 and the opening into the accommodating cavity, and the rotating portion of the bearing 9 is connected to the blade shaft 2. The fixed portion of the bearing 9 is pressed and fixed by the first fixing member 10 and the second fixing member 12.

[0051] Along the height direction of the blade shaft 2, the adjusting member 8 is fixed relative to the outer shell 5; the first fixing member 10 is engaged with the adjusting member 8; the first fixing member 10 is slidingly connected to the outer shell 5 along the height direction of the blade shaft 2, and the two are fixedly connected along the height direction perpendicular to the blade shaft 2, that is, the first fixing member 10 can only move along the height direction of the blade shaft 2, and cannot rotate in the plane perpendicular to the height direction of the blade shaft 2.

[0052] The second transmission gear 13 is engaged with the adjusting member 8, and the second transmission gear 13 is used to amplify the rotation angle of the adjusting member 8; the central axis of the second transmission gear 13 is connected to the rotating part of the encoder 14, and the encoder 14 is used to record the rotation angle amplified by the second transmission gear 13.

[0053] Based on the structure described above, it can be known that the driving device 6 drives the adjusting member 8 to rotate along the preset direction through the first transmission gear 7. Since the adjusting member 8 remains stationary in the height direction of the blade shaft 2, the first fixed member 10 engaged with the adjusting member 8 will move along the height direction of the blade shaft 2, thereby driving the bearing 9, the second fixed member 12 and the blade shaft 2 to move synchronously, and then adjust the distance between the inner blade 1 and the outer blade 3, that is, adjust the blade distance, but at the same time does not affect the rotation of the blade shaft 2 (note that the motor and other structures that drive the inner blade 1 to rotate are all existing technologies and will not be described in detail here), and when the inner blade 1 moves upward, that is, the blade distance is reduced, finer coffee powder is obtained, and when the outer blade 3 moves downward, that is, the blade distance is increased, relatively coarse coffee powder is obtained.

[0054] Furthermore, preferably, the automatic adjustment system for grinding beans further includes a control device, and the control device is communicatively connected to the encoder 14 and the drive device 6 respectively. The user can set the gear by himself, and the control device compares the set gear with the initial gear. When the set gear is greater than the initial gear, the control device controls the drive device 6 to rotate in a preset direction until it is equal to the set gear. When the set gear is less than the initial gear, the control device controls the drive device 6 to rotate in the opposite direction of the preset direction until it is equal to the set gear. Specifically, the control device calculates the rotation angle of the adjustment member 8 as 360°|M'-M| / m based on the set gear and the initial gear, where the set gear is M', M is the initial gear, and m is the total number of gears.

[0055] Combined with the above-mentioned adjustment method, the specific steps are as follows: the control device controls the driving device 6 to drive the first transmission gear 7 to rotate, the first transmission gear 7 synchronously drives the adjusting member 8 to rotate along the preset direction or in the opposite direction to the preset direction, the adjusting member 8 synchronously drives the first fixing member 10 to drive the knife shaft 2 to move along the height direction of the knife shaft 2, at the same time, the adjusting member 8 synchronously drives the second transmission gear 13 to rotate, and the encoder 14 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 8 is equal to 360°|M'-M| / m, and stops the driving device 6.

[0056] It can be seen that the automatic adjustment system for grinding beans provided by the present application not only has monitoring functions, but also has adjustment functions, making the grinding process more controllable. In addition, since the structure for driving the outer knife to rise and fall in the prior art is installed at the bottom of the knife shaft 2 of the inner knife 1, it is easy to install and maintain. In addition, the outer knife 3 remains stationary, and the inner knife 1 rotates and rises, so the fixed installation position of the outer knife 3 and the outer shell 5 can be used as a reference to adjust the knife distance of the inner knife 1, thereby facilitating the zero operation. In addition, since the knife shaft 2 is CNC machined, its own axial and radial accuracy can almost reach 0.01mm or even 0.005mm, thereby greatly improving the assembly accuracy of the knife distance adjustment structure, further ensuring the grinding accuracy, and effectively avoiding the cumulative error caused by assembly in the prior art.

[0057] In this embodiment, preferably, as shown in FIG1 , the automatic bean grinding adjustment system further includes a first bracket 16 disposed on the housing 5 , the driving device 6 and the first transmission gear 7 are both disposed on the first bracket 16 , and the central axis of the first transmission gear 7 is rotatable relative to the first bracket 16 .

[0058] According to the structure described above, the first bracket 16 plays a role in supporting the driving device 6 and the first transmission gear 7, and further, preferably, along the height direction of the knife shaft 2, an installation space is formed between the first bracket 16 and the housing 5, and the adjusting member 8 is fixed in the installation space. It can be seen that the first bracket 16 also plays a role in installing and fixing the adjusting member 8, that is, the adjusting member 8 can only rotate in a plane perpendicular to the knife shaft 2, and cannot move along the height direction of the knife shaft 2.

[0059] Furthermore, preferably, the first transmission gear 7 is a shaft gear. Accordingly, the first bracket 16 includes a support base 161 and a plurality of vertical plates 162 disposed thereon. The vertical plates 162 are spaced apart and serve to support the central axis of the shaft gear, which is capable of rotating relative to the support structure. The support base 161 and the bottom of the housing 5 form the aforementioned mounting space. Furthermore, the first bracket 16 includes an auxiliary mounting plate 163, which is connected to the support base 161. The drive device 6 is also connected to the auxiliary mounting plate 163.

[0060] Note: When the first transmission gear 7 is a shaft gear, the adjusting member 8 will rotate one tooth pitch for every rotation of the shaft gear, and the rotation angle of the adjusting member 8 for moving one tooth is c = 360° / n. For example: when n = 80, the driving device 6 rotates one circle, and the rotation angle of the adjusting member 8 is c = 360° / 80 = 4.5; when n = 120, the driving device 6 rotates one circle, and the rotation angle of the adjusting member 8 is c = 360° / 120 = 3°. Since the rotation angle is proportional to the moving distance of the inner knife 1, the inner knife 1 can be adjusted at a small distance.

[0061] When the first transmission gear 7 is a spur gear, when the driving device 6 rotates one circle, the distance traveled by the spur gear is 2×R1×π, so the rotation angle a of the adjusting member 8 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 8 is =120°. Compared with the first transmission gear 7 being a shaft gear, the inner cutter 1 can only be adjusted over a large distance.

[0062] By comparison, it can be seen that the driving device 6, 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 8 at small angles, and then make fine adjustments to the inner knife 1 at small distances.

[0063] Among them, preferably, the first bracket 16 and the housing 5 can be integrated or separated, depending on actual needs. When the two are separated, the two can be connected by a fastening member such as a bolt.

[0064] Preferably, the first bracket 16 forms a limit hole, and the adjusting member 8 is formed with a circular limit protrusion protruding from the bottom of the adjusting member 8. The limit protrusion is inserted into the limit hole and can rotate relative to the limit hole. Thus, the cooperation between the limit portion and the limit hole achieves horizontal limit of the adjusting member 8, that is, prevents it from deflecting, and allows it to rotate only at a predetermined position, thereby improving adjustment accuracy.

[0065] In this embodiment, preferably, as shown in FIG. 2 , the automatic bean grinding adjustment system further includes a second bracket 15 disposed on the housing 5 , and the central axis of the second transmission gear 13 is rotatably disposed on the second bracket 15 .

[0066] According to the structure described above, the second bracket 15 plays a role in supporting the second transmission gear 13 and the encoder 14 .

[0067] Further, preferably, the second bracket 15 includes an inverted U-shaped mounting frame and connecting plates on both sides of the mounting frame, the flat gear is mounted on the top of the U-shaped mounting frame, the encoder 14 is arranged in the internal cavity of the U-shaped mounting frame, and the encoder 14 can be connected to the U-shaped mounting frame through a fastening member such as a screw or a bolt; the central 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 14 below.

[0068] Among them, preferably, the second bracket 15 and the housing 5 can be integrated or separated, depending on actual needs. When the two are separated, the two can be connected by a fastening member such as a bolt.

[0069] In this embodiment, as shown in Figure 4 , the housing 5 preferably has a slot formed along its bottom height, and a guide housing 54 is formed around the slot. Part of the first fixing member 10 extends into the guide housing 54 and is movable relative thereto. The outer wall of the first fixing member 10 engages with the inner wall of the accommodating cavity. This guide housing 54 guides the movement of the first fixing member 10, preventing it from deflecting and improving adjustment accuracy.

[0070] Furthermore, preferably, the opening is a circular opening. Of course, it is not limited to this and can be selected according to actual needs.

[0071] In this embodiment, preferably, as shown in Figure 4, the first fixing member 10 is formed with a guide groove 101, and part of the structure of the guide shell 54 is inserted into the guide groove 101, which plays a role in guiding the movement of the first fixing member 10, that is, it plays a dual guiding role, thereby improving the adjustment accuracy.

[0072] Furthermore, preferably, the guide groove 101 extends along the outer circumference of the blade shaft 2 and is not a full ring structure. Of course, the present invention is not limited thereto, and the guide groove 101 may also be a full ring structure.

[0073] Furthermore, preferably, the structure of the guide housing 54 inserted into the guide groove 101 is longer than the structure exposed from the guide groove 101 to meet assembly requirements.

[0074] In this embodiment, preferably, as shown in FIG4 , the first fixing member 10 is formed with a mounting groove running through its bottom and a through hole running through its top, and the through hole is connected to the mounting groove, and the through hole is used to avoid the blade shaft 2 of the inner blade 1 .

[0075] Furthermore, preferably, the bearing 9 is disposed in the mounting groove, and the bottom wall of the mounting groove presses the top of the fixing portion of the bearing 9;

[0076] The second fixing member 12 is disposed in the installation groove and is threadedly connected to the inner wall of the installation groove. The top of the second fixing member 12 presses the bottom of the fixing portion of the bearing 9 .

[0077] According to the structure described above, the first fixing member 10 and the second fixing member 12 can be used to compress and fix the fixed portion of the bearing 9, so that the rotating portion of the bearing 9 can rotate freely relative to the fixed portion.

[0078] Furthermore, preferably, as shown in FIG4 , the second fixing member 12 is also provided with an avoidance cavity with a top opening, and the bottom end of the knife shaft 2 can extend into this avoidance cavity. Furthermore, preferably, along the height direction of the knife shaft 2, the cross-section of the second fixing member 12 is U-shaped. Of course, it is not limited to this. The second fixing member 12 can also be an annular sleeve structure, that is, it does not have a bottom.

[0079] In this embodiment, preferably, as shown in FIG4 , the cutter shaft 2 forms a limiting step 21 , and the bottom of the limiting step 21 abuts against the top of the rotating portion of the bearing 9 ;

[0080] The novel automatic adjustment system for grinding beans further includes a limit nut 11 threadably connected to the cutter shaft 2 , and the top of the limit nut 11 abuts against the bottom of the rotating portion of the bearing 9 .

[0081] According to the structure described above, the limiting step 21 and the limiting nut 11 are used to fix the rotating part of the bearing 9 and the knife shaft 2 together so that the two can rotate and move synchronously.

[0082] In this embodiment, as shown in FIG4 , the housing 5 preferably has a limiting groove extending along the height direction of the blade shaft 2, and the first fixing member 10 forms a limiting portion, which is slidably inserted into the limiting groove. Thus, the cooperation between the limiting portion and the limiting groove allows the first fixing member 10 to move only along the height direction of the blade shaft 2 and cannot rotate within a plane perpendicular to the height direction of the blade shaft 2.

[0083] In this embodiment, preferably, as shown in FIG2 , the second transmission gear 13 is a flat gear, the diameter of the adjustment member 8 is Y, the diameter of the second transmission gear 13 is Z, and Y>Z, thereby amplifying the rotation angle of the adjustment member 8, and the amplification ratio is When the rotation angle of the adjusting member 8 is B, the rotation angle of the spur gear is The encoder 14 will record the aforementioned

[0084] In this embodiment, preferably, as shown in Figure 3, the inner wall of the outer shell 5 is formed with a stepped reference surface, the outer wall of the outer knife 3 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 3 and the outer shell 5. During the zeroing process, the position of the inner knife 1 can be adjusted based on the surface of the stepped reference surface perpendicular to the direction of the knife axis 2, that is, the horizontal reference surface, and the outer knife 3 can be installed based on the entire reference surface.

[0085] On this basis, preferably, as shown in FIG3 , the outer shell 5 includes an upper shell 51, a lower shell 52 and a mounting shell 53; wherein the upper shell 51 is a structure with a hollow interior and open top and bottom, the lower shell 52 is connected to the upper shell 51 by bolts, and a transmission gear for driving the knife shaft 2 to rotate, that is, to grind, is installed in the lower shell 52 (this part is the existing technology and will not be described in detail here), and the inner knife 1 and the outer knife 3 are both arranged in the upper shell 51, and correspondingly, the upper shell 51 is provided with a first mounting hole, and the knife shaft 2 of the inner knife 1 is rotatably inserted into the first mounting hole through a bearing 9, and preferably, the lower shell 52 is formed with a second mounting hole, the edge of the second mounting hole is formed with the aforementioned extension portion, and the second mounting hole is mainly used to avoid the knife shaft 2;

[0086] The mounting housing 53 includes a first ring plate 531, a connecting ring plate 532, and a second ring plate 533, which are connected in sequence. The first ring plate 531 and the second ring plate 533 both extend along the height direction of the coffee powder preparation device, and the connecting ring plate 532 extends perpendicular to the height direction of the coffee powder preparation device. The diameter of the first ring plate 531 is larger than the diameter of the second ring plate 533, thus forming a stepped shape, thereby forming a stepped reference surface.

[0087] The coffee powder preparation device also includes a blade housing 4, to which the outer blade 3 is fixed. The outer wall of the blade housing 4 is adapted to fit within the inner wall of the mounting housing 53, and the blade housing 4 rests squarely on the step of the mounting housing 53. The blade housing 4 can be secured to the mounting housing 53 via a fastening member. Note that the outer blade 3 and blade housing 4 can be either integral or separate.

[0088] Example 2

[0089] 1 to 4 , the second embodiment of the present application further provides an adjustment method for a novel automatic bean grinding adjustment system, which is applied to the novel automatic bean grinding adjustment system described in the first embodiment above. Therefore, the method has all the beneficial technical effects of the novel automatic bean grinding adjustment system, and the same technical features and beneficial effects are not repeated here.

[0090] In this embodiment, preferably, as shown in FIG1 to FIG3 , the adjustment method of the new automatic bean grinding adjustment system includes the following steps:

[0091] 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 6 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 6 to rotate in the opposite direction of the preset direction until it is equal to the set gear position.

[0092] In combination with the above, it can be seen that applying this method to the aforementioned automatic adjustment system for grinding beans can achieve automatic detection and automatic adjustment.

[0093] In this embodiment, preferably, as shown in Figures 1 to 3, the control device calculates the rotation angle of the adjustment member 8 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;

[0094] The control device controls the driving device 6 to drive the first transmission gear 7 to rotate, and the first transmission gear 7 synchronously drives the adjusting member 8 to rotate along a preset direction or a direction opposite 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 spacing, 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 spacing, that is, to increase the gear). The adjusting member 8 synchronously drives the first fixed member 10 to move the tool shaft 2 along the height direction of the tool shaft 2. At the same time, the adjusting member 8 synchronously drives the second transmission gear 13 to rotate, and the encoder 14 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 8 is equal to 360°|M'-M| / m, and then stops the driving device 6.

[0095] 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

[0096] The automatic adjustment system for grinding beans provided by this application not only has monitoring but also adjustment functions, making the grinding process more controllable. In addition, the outer knife remains stationary, while the inner knife can rotate freely. The inner knife can be raised and lowered using components such as an adjustable member, a first fixing member, a second fixing member, and a bearing. Therefore, the fixed installation position of the outer knife and the outer shell can be used as a reference to adjust the distance between the inner knife and the outer knife, thereby facilitating zero operation. In addition, because the structure that drives the outer knife to rise and fall in the prior art is installed at the bottom of the inner knife's knife shaft, it is easy to install and maintain.

Claims

1. A novel automatic adjustment system for grinding beans, applied to a coffee powder preparation device, wherein the coffee powder preparation device comprises a housing and a first cutter and a second cutter arranged in the housing and matched with each other, wherein the first cutter is rotatably connected to the housing, and the second cutter is fixedly connected to the housing, characterized in that: The novel automatic adjustment system for grinding beans comprises: a driving device, a first transmission gear, an adjustment member, a first fixing member, a second fixing member, a bearing, 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 side wall of the adjusting member; The adjusting member is formed with an open accommodation cavity, and the first fixing member, the second fixing member and the bearing are all arranged in the accommodation cavity; the knife shaft of the first tool passes through the housing and the opening and extends into the accommodation cavity, and the rotating part of the bearing is connected to the knife shaft, and the fixed part of the bearing is pressed and fixed by the first fixing member and the second fixing member; Along the height direction of the knife shaft, the adjusting member is fixed relative to the housing; the first fixing member is meshed with the adjusting member; the first fixing member and the housing are slidably connected along the height direction of the knife shaft, and the two are fixedly connected along the height direction perpendicular to the knife shaft; 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 new automatic adjustment system for grinding beans according to claim 1 is characterized in that: The automatic bean grinding adjustment system further includes a first bracket disposed on the housing, the driving device and the first transmission gear are both disposed on the first bracket, and the central axis of the first transmission gear is rotatable relative to the first bracket; An installation space is formed between the first bracket and the housing along the height direction of the knife shaft, and the adjusting member is fixed to the installation space.

3. The new automatic adjustment system for grinding beans according to claim 1 is characterized in that: The automatic adjustment system for grinding beans further includes a second bracket disposed on the housing, and a central axis of the second transmission gear is rotatably disposed on the second bracket.

4. The new automatic adjustment system for grinding beans according to claim 1 is characterized in that: The first transmission gear is a shaft gear or a spur gear; and / or the second transmission gear is a spur gear.

5. The new automatic adjustment system for grinding beans according to claim 1 is characterized in that: The bottom of the housing is formed with a through opening along the height direction thereof, and a guide housing is formed around the through opening, a part of the structure of the first fixing member extends into the guide housing and can move relative to the guide housing; the outer side wall of the first fixing member is engaged with the inner wall of the accommodating cavity; The first fixing member is formed with a guide groove, and a partial structure of the guide housing is inserted into the guide groove.

6. The new automatic adjustment system for grinding beans according to claim 1, characterized in that: The first fixing member is formed with a mounting groove penetrating the bottom thereof and a through hole penetrating the top thereof, and the through hole is connected with the mounting groove; The bearing is arranged in the installation groove, and the bottom wall of the installation groove presses the top of the fixing part of the bearing; The second fixing member is disposed in the installation groove and is connected to the inner wall of the installation groove by thread, and the top of the second fixing member presses the bottom of the fixing portion of the bearing.

7. The novel automatic adjustment system for grinding beans according to claim 1, characterized in that: 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 novel automatic adjustment system for grinding beans further comprises a limit nut connected to the cutter shaft thread, and the top of the limit nut abuts against the bottom of the rotating part of the bearing; And / or, 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 located on the reference surface; And / or, the housing is formed with a limiting groove extending along the height direction of the knife shaft, the first fixing member is formed with a limiting portion, and the limiting portion is slidably inserted in the limiting groove.

8. The novel 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. A novel method for adjusting a bean grinding automatic adjustment system, characterized in that: Applied to the novel automatic adjustment system for grinding beans as claimed in claim 8, the adjustment method of the novel 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.

10. The method for adjusting the automatic adjustment system 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 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, the adjusting member synchronously drives the first fixing member to move the knife shaft along the height direction of the knife shaft, and 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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