A sharpness adjustment mechanism and a bean grinder

Abstract

The utility model provides a kind of blade adjusting mechanism and bean grinder, it is related to the field of grinding equipment.The spacing between fixed grinding wheel and movable grinding wheel of bean grinder is adjusted, and adjusting mechanism includes: adjusting ring, its movable setting is in rack top;Driving ring is connected in the inside of adjusting ring, and its inside is provided with the annular limiting portion of inward bulge;First limiting part, abut on limiting portion, and rotationally set in the outside of driving shaft;And the top of first limiting part is in abutment with the limiting ring embedded in the outside of driving shaft;Guide sleeve, fixed in the inside of rack and with adjusting ring between there is adjusting spacing, its top inside is with the lower outside of driving ring screw connection, its bottom is embedded with second limiting part;Second limiting part rotationally set in the outside of driving shaft, and second limiting part and movable grinding wheel between abutment have elastic member, and elastic member set in the outside of driving shaft.This application can accurately adjust the spacing between two grinding wheels, compensate tolerance, satisfy different coffee grinding needs.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment, and more specifically, to a blade adjustment mechanism and a coffee grinder. Background Technology

[0002] A grinder is a device that grinds beans into powder, such as a coffee grinder. A coffee grinder typically includes a feeding section, a grinding section, and a powder dispensing section. The grinding section consists of two staggered grinding blades that grind coffee beans through their relative rotation.

[0003] However, due to limitations in the injection molding process, existing coffee grinders suffer from poor dimensional stability of injection molded parts, and the cumulative tolerance is prone to exceed the standard. This results in low precision in controlling the distance between the two grinding blades, making it difficult to meet the needs of brewing different types of coffee in terms of the fineness of the coffee powder. Utility Model Content

[0004] The purpose of this invention is to provide a blade adjustment mechanism and a coffee grinder, which can precisely adjust the distance between the two grinding blades, compensate for tolerances, and meet different coffee grinding needs.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This application provides a blade adjustment mechanism for adjusting the distance between a fixed grinding blade and a movable grinding blade in a coffee grinder. The fixed grinding blade is installed inside the frame; the movable grinding blade is correspondingly disposed inside the fixed grinding blade and connected to the bottom end of a drive shaft; the adjustment mechanism includes:

[0007] An adjusting ring, which is movably mounted on the top of the frame;

[0008] A drive ring is connected to the inner side of the adjustment ring, and an inwardly protruding annular limiting part is provided on its inner side;

[0009] The first limiting member abuts against the limiting part and is rotatably sleeved on the outside of the drive shaft; and the top of the first limiting member abuts against the limiting ring embedded on the outside of the drive shaft.

[0010] A guide sleeve is fixed inside the frame and has an adjustable gap with the adjusting ring. Its top inner side is threaded to the lower outer side of the drive ring, and its bottom is embedded with a second limiting member. The second limiting member is rotatably sleeved outside the drive shaft, and an elastic member abuts between the second limiting member and the movable grinding tool. The elastic member is sleeved outside the drive shaft.

[0011] Furthermore, based on the aforementioned scheme, the adjusting ring includes an outer ring sleeve and an inner ring sleeve. The outer ring sleeve is rotatably disposed at the opening at the top of the frame. The inner ring sleeve is spaced apart inside the outer ring sleeve, and its outer wall is connected to the inner wall of the outer ring sleeve through multiple connecting rods. The inner ring sleeve is connected to the driving ring.

[0012] Furthermore, based on the aforementioned scheme, the height of the inner ring sleeve is lower than the height of the outer ring sleeve, and the inner ring sleeve is correspondingly disposed on the lower inner side of the outer ring sleeve; the connecting rod is inclinedly connected between the outer ring sleeve and the inner ring sleeve.

[0013] Furthermore, based on the aforementioned scheme, the inner side of the inner ring sleeve is an annular stepped shape that is narrower at the top and wider at the bottom; the upper part of the drive ring abuts against the lower stepped groove of the inner ring sleeve, and the outer wall of the drive ring is meshed with the inner wall of the inner ring sleeve.

[0014] Furthermore, based on the aforementioned scheme, a positioning ring is also provided on the inner side of the inner ring sleeve. The positioning ring is sleeved outside the drive shaft and has a gap between it and the drive shaft. The outer side of the positioning ring is threadedly connected to the upper inner side of the drive ring, and its top extends axially and is pressed and fixed to the top of the inner ring sleeve.

[0015] Furthermore, based on the aforementioned scheme, the top and bottom of the guide sleeve are respectively provided with stepped grooves, and the second limiting member is embedded in the stepped groove at the bottom; the lower part of the drive ring is threadedly connected to the inner wall of the stepped groove at the top of the guide sleeve, and a third limiting member is provided at the bottom of the stepped groove; the third limiting member is rotatably sleeved on the outside of the drive shaft.

[0016] Furthermore, based on the aforementioned scheme, the guide sleeve includes an inner cylinder and multiple connecting plates, the outer wall of the inner cylinder being connected to the inner wall of the frame through the multiple connecting plates; a feeding space is formed between the multiple connecting plates.

[0017] A coffee grinder includes the aforementioned blade adjustment mechanism, frame, fixed razor blade, movable razor blade, drive shaft, rocker arm assembly, and collection tank, wherein the drive shaft is axially inserted through the frame and the blade adjustment mechanism;

[0018] The fixed grinding blade is installed on the inner side of the bottom of the frame, and the movable grinding blade is fixedly sleeved on the bottom of the drive shaft and corresponds to the inner side of the fixed grinding blade.

[0019] The rocker assembly is disposed on the top of the outer ring sleeve and connected to the top of the drive shaft; and there is a space for movement between the rocker assembly and the outer ring sleeve;

[0020] The collection tank is detachably connected to the bottom of the frame and is located below the fixed grinding blade and the movable grinding blade.

[0021] Furthermore, based on the aforementioned scheme, the fixed grinding tool is threadedly connected to the inner side of the bottom of the frame via a mounting seat.

[0022] Furthermore, based on the aforementioned scheme, the collection tank is threadedly connected to the frame.

[0023] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0024] This application features an adjusting ring at the top of the frame, with a drive ring connected to its inner side. Rotating the adjusting ring causes the connected drive ring to rotate. Since the lower outer side of the drive ring is threaded to the top inner side of the guide sleeve, and the guide sleeve is fixed inside the frame, the rotation of the drive ring causes it to move axially within the frame. The drive shaft is limited by a protruding limiting part on the inner side of the drive ring and a first limiting member, ensuring the drive ring can drive the drive shaft to move synchronously axially and guaranteeing stable operation. The second limiting member at the bottom of the guide sleeve acts on the movable grinding tool through an elastic element, cooperating with the axial movement of the drive shaft to adjust the distance between the movable and fixed grinding tools. This application offers a simple adjustment process; the distance can be adjusted simply by rotating the adjusting ring. The threaded connection ensures high adjustment accuracy, allowing precise control of the grinding coarseness and compensation for tolerances. The stable fit between components effectively prevents changes in the distance after adjustment, ensuring uniform grinding results. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the coffee grinder according to an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of the structure of the coffee grinder according to an embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional view of the coffee grinder according to an embodiment of the present invention;

[0029] Figure 4 This is a partial cross-sectional structural diagram of the adjustment mechanism of this utility model;

[0030] Figure 5 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0031] Icons: 1-Fixed grinding blade, 2-Moving grinding blade, 3-Frame, 4-Drive shaft, 5-Adjusting ring, 51-Outer ring sleeve, 52-Inner ring sleeve, 521-Internal gear ring, 53-Connecting rod, 6-Drive ring, 61-Limiting part, 62-Outer gear ring, 7-First limiting component, 8-Limiting ring, 9-Guide sleeve, 91-Inner cylinder, 92-Connecting plate, 10-Second limiting component, 11-Elastic component, 12-Positioning ring, 13-Third limiting component, 14-Rock arm assembly, 15-Collection tank. Detailed Implementation

[0032] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0033] Please refer to Figures 1-5 The diagram shows the blade adjustment mechanism and the structure of the coffee grinder.

[0034] This embodiment provides a blade adjustment mechanism for adjusting the distance between the fixed grinding blade 1 and the movable grinding blade 2 of a coffee grinder. The fixed grinding blade 1 is installed inside the frame 3; the movable grinding blade 2 is correspondingly arranged inside the fixed grinding blade 1 and connected to the bottom end of the drive shaft 4; the adjustment mechanism includes:

[0035] Adjusting ring 5 is movably mounted on the top of frame 3;

[0036] The drive ring 6 is connected to the inner side of the adjusting ring 5, and its inner side is provided with an inwardly protruding annular limiting part 61;

[0037] The first limiting member 7 abuts against the limiting part 61 and is rotatably sleeved on the outside of the drive shaft 4; and the top of the first limiting member 7 abuts against the limiting ring 8 embedded on the outside of the drive shaft 4.

[0038] The guide sleeve 9 is fixed inside the frame 3 and has an adjustable gap with the adjusting ring 5. Its top inner side is threaded to the lower outer side of the drive ring 6, and its bottom is embedded with a second limiting member 10. The second limiting member 10 is rotatably sleeved on the outside of the drive shaft 4, and an elastic member 11 abuts between the second limiting member 10 and the movable grinding tool 2. The elastic member 11 is sleeved on the outside of the drive shaft 4.

[0039] The following will further describe a blade adjustment mechanism according to this exemplary embodiment.

[0040] In some embodiments, the aforementioned adjustment mechanism includes an adjustment ring 5, a drive ring 6, a first limiting member 7, and a guide cartridge. The adjustment ring 5 is movably disposed on the top of the frame 3, allowing it to rotate and move up and down on the top of the frame 3. The drive ring 6 is connected to the inner side of the adjustment ring 5, and rotation of the adjustment ring 5 drives the drive ring 6 to rotate synchronously. The guide sleeve 9 is fixed inside the frame 3 and has an adjustable gap with the adjustment ring 5, with its top inner side threadedly connected to the lower outer side of the drive ring 6. Because the guide sleeve 9 is fixed, rotation of the drive ring 6, under the action of the threaded connection, causes it to move axially along the guide sleeve 9. An inwardly protruding annular limiting part 61 is provided inside the drive ring 6; a first limiting member 7 abuts against the limiting part 61 and is rotatably sleeved on the outside of the drive shaft 4; and the top of the first limiting member 7 abuts against the limiting ring 8 embedded on the outside of the drive shaft 4; so that when the drive ring 6 moves upward, it can push the drive shaft 4 to move upward synchronously under the limiting action of the first limiting member 7 and the limiting ring 8, thereby increasing the distance between the movable grinding tool 2 and the fixed grinding tool 1. A second limiting member 10 is embedded at the bottom of the guide sleeve 9. The second limiting member 10 is rotatably sleeved on the outside of the drive shaft 4, and an elastic member 11 abuts between the second limiting member 10 and the movable grinding tool 2. The elastic member 11 is sleeved on the outside of the drive shaft 4. The above-mentioned elastic member 11 is preferably a spring. By setting the spring, when the drive ring 6 drives the drive shaft 4 to move upward, the spring is stretched. When it moves downward, the elastic recovery action of the spring pulls the first limiting member 7 and the limiting ring 8 to move downward synchronously with the drive ring 6.

[0041] The adjusting ring 5 drives the drive ring 6 to rotate, and the axial displacement is achieved through the threaded engagement between the drive ring 6 and the guide sleeve 9. This ensures high transmission accuracy and precise control of the thread pitch; for example, a 1mm pitch can achieve 0.1mm-level adjustment, ensuring accurate displacement of the movable grinding tool 2. The cooperation between the first limiting member 7 and the limiting ring 8 stably transmits the axial force of the drive ring 6 to the drive shaft 4, preventing the drive shaft 4 from shifting under force. The elastic member 11 remains compressed during adjustment, buffering the axial impact of the drive shaft 4 and reducing component wear. Furthermore, its elasticity maintains a stable fit between the movable grinding tool 2 and the fixed grinding tool 1, preventing spacing fluctuations due to vibration during grinding. This application features a simple adjustment process; spacing adjustment is achieved by rotating the adjusting ring 5. The threaded connection ensures high adjustment accuracy, allowing precise control of grinding coarseness and tolerance compensation. The stable fit between components effectively prevents changes in spacing after adjustment, ensuring uniform grinding results.

[0042] In a preferred embodiment, the adjustment ring 5 includes an outer ring sleeve 51 and an inner ring sleeve 52. The outer ring sleeve 51 is rotatably disposed at the top opening of the frame 3. The inner ring sleeve 52 is disposed at intervals inside the outer ring sleeve 51, and its outer wall is connected to the inner wall of the outer ring sleeve 51 through multiple connecting rods 53. The inner ring sleeve 52 is connected to the drive ring 6.

[0043] Specifically, the outer ring 51 is a cylindrical ring with a diameter larger than the opening diameter at the top of the frame 3. It is fitted over the opening at the top of the frame 3. The larger diameter of the outer ring 51 facilitates gripping and force application, making rotation easier. The inner ring 52 is a circular structure with a smaller diameter than the outer ring 51, and the two are coaxially arranged. There are 3-4 connecting rods 53, evenly distributed along the circumference. Their ends are welded and fixed to the inner wall of the outer ring 51 and the outer wall of the inner ring 52, respectively, forming a spoke-shaped support structure. The frame structure formed by the connecting rods 53 evenly transmits the torque of the outer ring 51 to the inner ring 52, avoiding deformation caused by single-point force. The spacing between the inner and outer rings 51 reduces the overall weight of the adjusting ring 5, while also providing space for the feed inlet at the top of the frame 3, without affecting the feeding of coffee beans.

[0044] In a preferred embodiment, the height of the inner ring sleeve 52 is lower than the height of the outer ring sleeve 51, and the inner ring sleeve 52 is correspondingly positioned on the lower inner side of the outer ring sleeve 51; the connecting rod 53 is inclinedly connected between the outer ring sleeve 51 and the inner ring sleeve 52. The inner ring sleeve 52 is located on the lower inner side of the outer ring sleeve 51, causing the center of gravity of the adjusting ring 5 to be biased towards the inner side of the frame 3, improving stability during rotation and reducing swaying. The inclined connecting rod 53 decomposes the radial force of the outer ring sleeve 51 into axial and radial components, dispersing stress concentration and enhancing structural strength. Simultaneously, lowering the inner ring sleeve 52 allows for rotational space to be reserved for the top rocker assembly 14.

[0045] In a preferred embodiment, the inner side of the inner ring sleeve 52 is an annular stepped shape, narrower at the top and wider at the bottom. The upper part of the drive ring 6 abuts against the lower stepped groove of the inner ring sleeve 52, and the outer wall of the drive ring 6 meshes with the inner wall of the inner ring sleeve 52. That is, the upper outer wall of the drive ring 6 is provided with an external toothed ring 62, and the inner wall of the inner ring sleeve 52 is correspondingly provided with an internal toothed ring 521, which mesh with each other. The stepped groove provides axial positioning for the drive ring 6, preventing it from moving up and down and ensuring meshing stability. The meshing connection accurately transmits the rotation of the inner ring sleeve 52 to the drive ring 6, avoiding slippage. Compared with friction transmission, the transmission efficiency is increased to over 95%. At the same time, the gear meshing has reverse self-locking property, which can keep the position of the drive ring 6 stable after adjustment and prevent the gap change caused by vibration.

[0046] In a preferred embodiment, a positioning ring 12 is further provided on the inner side of the inner ring sleeve 52. The positioning ring 12 is sleeved on the outside of the drive shaft 4 and has a gap between it and the drive shaft 4. The outer side of the positioning ring 12 is threadedly connected to the upper inner side of the drive ring 6, and its top extends axially and is pressed and fixed to the top of the inner ring sleeve 52. The threaded connection between the positioning ring 12 and the drive ring 6 achieves axial fixation of both. Combined with the stepped groove positioning of the inner ring sleeve 52, the drive ring 6 is constrained in both the axial and radial directions, improving installation accuracy and controlling the coaxiality error within 0.1mm, which can compensate for the tolerance of the injection molding process. The gap between the positioning ring 12 and the drive shaft 4 avoids interference with the rotation of the drive shaft 4, and the flange structure formed by its extension enhances the structural rigidity of the top of the inner ring sleeve 52 and reduces deformation.

[0047] In a preferred embodiment, the guide sleeve 9 has stepped grooves at its top and bottom, and the second limiting member 10 is embedded in the stepped groove at the bottom. The lower part of the drive ring 6 is threadedly connected to the inner wall of the stepped groove at the top of the guide sleeve 9, and a third limiting member 13 is provided at the bottom of the stepped groove. The third limiting member 13 is rotatably sleeved on the outside of the drive shaft 4. The top stepped groove provides radial guidance for the drive ring 6, ensuring smooth threaded transmission. The third limiting member 13 limits the maximum downward movement of the drive ring 6, preventing component collisions caused by excessive thread engagement. The bottom stepped groove fixes the second limiting member 10, ensuring that the elastic force of the elastic member 11 acts stably on the drive shaft 4.

[0048] Understandably, the first limiting member 7, the second limiting member 10, and the third limiting member 13 can all be bearings or annular blocks with bearings installed inside the annular blocks to achieve flexible rotation with the drive shaft 4.

[0049] Furthermore, the bottom of the second limiting member 10 can be connected to a larger diameter abutment block to abut the spring and provide a more stable abutment force for the spring.

[0050] In a preferred embodiment, the guide sleeve 9 includes an inner cylinder 91 and multiple connecting plates 92. The outer wall of the inner cylinder 91 is connected to the inner wall of the frame 3 via the multiple connecting plates 92; a feeding space is formed between the multiple connecting plates 92. The frame structure formed by the connecting plates 92 maximizes the feeding space and avoids material blockage while ensuring the fixing strength of the guide sleeve 9.

[0051] This application embodiment also provides a coffee grinder, including the aforementioned blade adjustment mechanism, a frame 3, a fixed grinding blade 1, a movable grinding blade 2, a drive shaft 4, a rocker assembly 14, and a collection tank 15. The drive shaft 4 is axially inserted through the frame 3 and the blade adjustment mechanism. The fixed grinding blade 1 is installed on the inner bottom of the frame 3, and the movable grinding blade 2 is fixedly sleeved on the bottom of the drive shaft 4 and corresponds to the inner side of the fixed grinding blade 1. The rocker assembly 14 is located on the top of the outer ring sleeve 51 and connected to the top of the drive shaft 4. There is a space for movement between the rocker assembly 14 and the outer ring sleeve 51. The collection tank 15 is detachably connected to the bottom of the frame 3 and is located below the fixed grinding blade 1 and the movable grinding blade 2. The blade adjustment mechanism is integrated with the main body of the coffee grinder, enabling convenient adjustment of the grinding coarseness. The space for movement between the rocker assembly 14 and the outer ring sleeve 51 avoids interference between their rotations, ensuring that adjustment and grinding operations can be performed independently. The detachable design of the collection tank 15 facilitates material removal and cleaning. The overall structure is compact and suitable for home or small commercial settings.

[0052] In a preferred embodiment, the fixed grinding blade 1 is threadedly connected to the inner bottom of the frame 3 via a mounting base. This threaded connection allows for fine-tuning of the mounting height of the fixed grinding blade 1, which, in conjunction with the movable grinding blade 2, expands the range of spacing adjustment. It also facilitates the disassembly of the fixed grinding blade 1 for grinding or replacement, improving maintenance convenience.

[0053] As a preferred embodiment, the collection tank 15 is threadedly connected to the frame 3. The threaded connection has good sealing performance, reducing the powder leakage rate by 90% compared to the snap-fit ​​connection, and is easy to disassemble. At the same time, the connection strength is high, preventing the collection tank 15 from falling off due to vibration during grinding.

[0054] The working principle of this utility model is as follows: When it is necessary to adjust the distance between the fixed grinding blade 1 and the movable grinding blade 2, the outer ring sleeve 51 of the adjusting ring 5 is rotated. The outer ring sleeve 51 drives the inner ring sleeve 52 to rotate through the connecting rod 53. The inner ring sleeve 52 is meshed with the drive ring 6, thereby driving the drive ring 6 to rotate. Since the lower part of the drive ring 6 is threaded to the inner wall of the stepped groove at the top of the guide sleeve 9, the drive ring 6 will move up and down along the guide sleeve 9 when it rotates. The annular limiting part 61 of the drive ring 6 pushes the first limiting member 7. The first limiting member 7 drives the drive shaft 4 to move up and down through the limiting ring 8, thereby driving the movable grinding blade 2 to move up and down, realizing the adjustment of the distance between it and the fixed grinding blade 1. The elastic member 11 plays a buffering and resetting role between the second limiting member 10 and the movable grinding blade 2.

[0055] During grinding, the material is put into the feed space of the guide sleeve 9, the rocker arm assembly 14 is turned to drive the drive shaft 4 to rotate, which in turn drives the movable grinding blade 2 to rotate, and cooperates with the fixed grinding blade 1 to grind the material. The ground material falls into the collection tank 15.

[0056] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0057] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A blade adjustment mechanism for adjusting the distance between a fixed grinding blade and a movable grinding blade of a coffee grinder, wherein the fixed grinding blade is mounted inside the frame; the movable grinding blade is correspondingly disposed inside the fixed grinding blade and connected to the bottom end of a drive shaft; characterized in that, The adjustment mechanism includes: An adjusting ring, which is movably mounted on the top of the frame; A drive ring is connected to the inner side of the adjustment ring, and an inwardly protruding annular limiting part is provided on its inner side; The first limiting member abuts against the limiting part and is rotatably sleeved on the outside of the drive shaft; and the top of the first limiting member abuts against the limiting ring embedded on the outside of the drive shaft. A guide sleeve is fixed inside the frame and has an adjustable gap with the adjusting ring. Its top inner side is threaded to the lower outer side of the drive ring, and its bottom is embedded with a second limiting member. The second limiting member is rotatably sleeved outside the drive shaft, and an elastic member abuts between the second limiting member and the movable grinding tool. The elastic member is sleeved outside the drive shaft.

2. The blade adjustment mechanism according to claim 1, characterized in that, The adjusting ring includes an outer ring sleeve and an inner ring sleeve. The outer ring sleeve is rotatably disposed at the opening at the top of the frame. The inner ring sleeve is spaced inside the outer ring sleeve, and its outer wall is connected to the inner wall of the outer ring sleeve through multiple connecting rods. The inner ring sleeve is connected to the driving ring.

3. The blade adjustment mechanism according to claim 2, characterized in that, The height of the inner ring sleeve is lower than that of the outer ring sleeve, and the inner ring sleeve is correspondingly disposed on the lower inner side of the outer ring sleeve; the connecting rod is inclinedly connected between the outer ring sleeve and the inner ring sleeve.

4. The blade adjustment mechanism according to claim 2, characterized in that, The inner side of the inner ring sleeve is a stepped ring shape that is narrower at the top and wider at the bottom; the upper part of the drive ring abuts against the lower stepped groove of the inner ring sleeve, and the outer wall of the drive ring is meshed with the inner wall of the inner ring sleeve.

5. The blade adjustment mechanism according to claim 4, characterized in that, A positioning ring is also provided on the inner side of the inner ring sleeve. The positioning ring is sleeved outside the drive shaft and has a gap between it and the drive shaft. The outer side of the positioning ring is threaded to the upper inner side of the drive ring, and its top extends axially and is pressed and fixed to the top of the inner ring sleeve.

6. The blade adjustment mechanism according to claim 1, characterized in that, The guide sleeve has stepped grooves at its top and bottom, and the second limiting member is embedded in the stepped groove at the bottom; the lower part of the drive ring is threaded to the inner wall of the stepped groove at the top of the guide sleeve, and a third limiting member is provided at the bottom of the stepped groove; the third limiting member is rotatably sleeved on the outside of the drive shaft.

7. The blade adjustment mechanism according to claim 1, characterized in that, The guide sleeve includes an inner cylinder and multiple connecting plates. The outer wall of the inner cylinder is connected to the inner wall of the frame through the multiple connecting plates. A feeding space is formed between the multiple connecting plates.

8. A coffee grinder, characterized in that, Includes a blade adjustment mechanism, a frame, a fixed sharpening tool, a movable sharpening tool, a drive shaft, a rocker assembly, and a collection tank as described in any one of claims 1-7, wherein the drive shaft is axially disposed through the frame and the blade adjustment mechanism; The fixed grinding blade is installed on the inner side of the bottom of the frame, and the movable grinding blade is fixedly sleeved on the bottom of the drive shaft and corresponds to the inner side of the fixed grinding blade. The rocker assembly is disposed on the top of the outer ring sleeve and connected to the top of the drive shaft; and there is a space for movement between the rocker assembly and the outer ring sleeve; The collection tank is detachably connected to the bottom of the frame and is located below the fixed grinding blade and the movable grinding blade.

9. The coffee grinder according to claim 8, characterized in that, The fixed grinding tool is threadedly connected to the inner side of the bottom of the frame via a mounting base.

10. The coffee grinder according to claim 8, characterized in that, The collection tank is threadedly connected to the frame.

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