High-precision external adjustment type bean grinder

Abstract

The utility model discloses a high-precision external adjustment bean grinder, which comprises a main machine shell, a grinding component and a thickness adjusting structure, the thickness adjusting structure comprises an outer adjusting ring, an inner driving ring, a transmission gear and a linkage component, the outer adjusting ring is sleeved and rotates relative to the main machine shell, the outer adjusting ring comprises an inner gear ring, the inner driving ring comprises an outer gear ring, and the transmission gear is arranged on the outer gear ring. The outer adjusting ring is meshed with the inner driving ring through the transmission gear and drives the inner driving ring to rotate so as to drive the linkage assembly to adjust the grinding disc gap. After the number of rotation turns of the inner driving gear ring is increased, the adjusting precision of the adjusting structure is greatly improved, the advantages that an outer adjusting type bean grinder is convenient to adjust and a one-circle type bean grinder is clear in scale indication are reserved, and meanwhile the problem that in the prior art, a one-circle type adjusting bean grinder is low in precision is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee grinding equipment, in particular to a high-precision externally adjustable coffee bean grinder. Background Art

[0002] The grinding process is very important for coffee making. There are various independent and professional coffee grinders on the market. In terms of grinding drive method, coffee grinders are currently divided into two basic styles: electric grinders and manual grinders. Electric grinders are more labor-saving and convenient when grinding, and the single grinding amount is relatively large.

[0003] The basic functions of electric bean grinders currently include the function of adjusting the coarseness of coffee powder, so that users can prepare different types of coffee such as Italian, Mocha, hand-brewed, French press, etc. by adjusting the coarseness of coffee powder. The adjustment structure of electric bean grinders currently on the market usually includes two forms. One form is to facilitate adjustment. A circle of adjustment rings is set on the main body of the bean grinder. According to the principle of the screw rod, the adjustment ring directly drives the drive member to move up and down to adjust the grinding disc gap. Since the adjustment range of the grinding disc gap of the bean grinder is small, usually within 2mm, a one-circle adjustment ring is used. The adjustment accuracy of the drive member is poor within the limited rotation angle range. Another form is to improve the adjustment accuracy by adjusting the adjustment member in multiple circles. However, the problem with this type of adjustment device is that due to the multi-circle adjustment, when determining the number of adjustment gears, the user needs to pay attention not only to the rotation scale on the adjustment member but also to the number of circles of the adjustment member, which is very easy to confuse when consumers use it. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a high-precision external adjustment type coffee grinder, which improves the accuracy of particle size adjustment based on the single-turn adjustment of the adjustment ring. To achieve the above purpose, the present invention provides the following technical solutions:

[0005] The utility model provides a high-precision external adjustment type bean grinder, comprising a main body housing, a grinding assembly and a coarse and fine adjustment structure, wherein the coarse and fine adjustment structure is used to adjust the grinding gap of the grinding assembly, and the coarse and fine adjustment structure comprises:

[0006] An outer adjustment ring rotates relative to the main body housing, and the outer adjustment ring includes an inner gear ring;

[0007] An inner driving ring, which drives the grinding assembly to rise and fall to adjust the gap through a linkage assembly, and the inner driving ring includes an outer gear ring;

[0008] Transmission gear, the outer adjustment ring is meshed with the inner drive ring through the transmission gear;

[0009] The reduction ratio between the outer adjustment ring and the inner drive ring is less than or equal to 1:1.4.

[0010] As a further improvement of the present invention, the outer adjustment ring is coaxially arranged with the inner drive ring.

[0011] As a further improvement of the present invention, the reduction ratio between the outer adjustment ring and the inner drive ring is less than or equal to 1:1.6.

[0012] As a further improvement of the utility model, the reduction ratio between the outer adjustment ring and the inner drive ring is less than or equal to 1:1.6 and greater than or equal to 1:3.

[0013] As a further improvement of the present invention, the outer adjustment ring cooperates with the main body housing to be provided with adjustment scales distributed circumferentially.

[0014] As a further improvement of the utility model, the grinding assembly includes an outer grinding disc and an inner grinding disc which are sleeved with each other, and the linkage assembly includes a driving sleeve rod, which is used to drive the outer grinding disc or the inner grinding disc to move axially. The driving sleeve rod is restricted from rotating in the main body housing, and the driving sleeve rod is threadedly connected to the inner driving ring. When the outer adjusting ring drives the inner driving ring to rotate, the driving sleeve rod is driven to move axially up and down.

[0015] As a further improvement of the utility model, a mounting bracket is arranged inside the main body shell, a driving motor is fixed on the mounting bracket, a connecting shaft is arranged on the inner grinding disc, the output end of the driving motor is connected to the connecting shaft, the connecting shaft is driven to rotate, the connecting shaft and the output end of the driving motor are axially slidingly arranged, and one end of the driving sleeve rod is axially fixedly connected to the connecting shaft.

[0016] As a further improvement of the utility model, the outer adjustment ring is rotatably connected to the mounting bracket, a transmission gear mounting seat is provided on the mounting bracket, and the transmission gear is rotatably arranged with the transmission gear mounting seat.

[0017] As a further improvement of the utility model, the outer adjustment ring is provided with a rolling groove, the mounting bracket is provided with a first marble assembly that rolls with the rolling groove, and the mounting bracket is also provided with a second marble assembly that cooperates with the inner gear ring of the outer adjustment ring.

[0018] As a further improvement of the utility model, a mounting bracket and a grinding disc bracket are arranged in the main body shell, and the mounting bracket and the grinding disc bracket are respectively integrally formed, and the mounting bracket is fixedly connected to the grinding disc bracket, and the driving sleeve rod is axially slidingly arranged in the mounting bracket, and the grinding disc bracket includes an outer grinding disc mounting hole and a connecting shaft mounting hole, and two coaxially arranged bearings are arranged in the connecting shaft mounting hole, and the connecting shaft is passed through the bearings.

[0019] In summary, the utility model includes at least one of the following beneficial technical effects:

[0020] By adopting the above technical solution, the utility model has the following advantages:

[0021] By making the number of teeth of the outer adjustment ring of the adjustment structure larger than the number of teeth of the inner drive ring and meshing through the transmission gear, the reduction ratio reaches at least 1:1.4. Under ideal conditions, when the outer adjustment ring is driven 1 circle, it can at least drive the inner drive gear ring to rotate 1.4 circles. After increasing the number of circles of the inner drive gear ring, the adjustment accuracy of the adjustment structure is greatly increased. In other words, compared with the one-circle adjustment grinder in the prior art, the adjustment structure of the utility model enables the outer adjustment ring to have more adjustment levels. The advantages of the convenient adjustment of the outer adjustment grinder and the clear scale indication of the one-circle grinder are retained, while overcoming the problem of low accuracy of the one-circle adjustment grinder in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the coarse and fine adjustment structure of one embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of one embodiment of the utility model;

[0024] Figure 3 This is a schematic cross-sectional view of the structure of one embodiment of the utility model;

[0025] Figure 4 This utility model Figure 3 Enlarged structural diagram at A in the middle.

[0026] Figure numerals: 1. Main body housing; 2. Outer adjustment ring; 3. Inner drive ring; 4. Transmission gear; 5. Adjustment scale; 6. Outer grinding disc; 7. Inner grinding disc; 8. Driving sleeve rod; 9. Mounting bracket; 10. Driving motor; 11. Connecting shaft; 12. Rolling groove; 13. First marble assembly; 14. Second marble assembly; 15. Grinding disc bracket; 16. Outer grinding disc mounting hole; 17. Connecting shaft mounting hole; 18. Bearing. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise specified, "plurality" means two or more.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection. It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Although the embodiments of the utility model have been shown and described, those skilled in the art should understand that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the utility model, and the scope of the utility model is defined by the claims and their equivalents. Improvements made without creative work should be included in the scope of protection of the utility model.

[0031] One specific implementation example is Figure 1-3 As shown, a high-precision external adjustment type coffee bean grinder includes a main body shell 1, a grinding assembly and a coarseness adjustment structure, the grinding assembly includes an outer grinding disc 6 and an inner grinding disc 7, the coarseness adjustment structure is used to adjust the gap between the outer grinding disc 6 and the inner grinding disc 7, the coarseness adjustment structure includes an outer adjustment ring 2, an inner driving ring 3, a transmission gear 4 and a linkage assembly, the outer adjustment ring 2 is sleeved and rotated relative to the main body shell 1, the outer adjustment ring 2 includes an inner gear ring, the inner driving ring 3 includes an outer gear ring, the outer adjustment ring 2 and the inner driving ring 3 are coaxially arranged, the outer adjustment ring 2 is meshed with the inner driving ring 3 through the transmission gear 4, and the outer adjustment ring 2 drives the inner driving ring 3 to rotate to drive the linkage assembly to adjust the gap between the grinding discs.

[0032] The outer adjustment ring 2 is cooperated with the main body housing 1 to set adjustment scales 5 distributed circumferentially. Since the adjustment angle of the outer adjustment ring 2 is set to be less than or equal to 360°, the user can accurately and clearly read the current coarse and fine gear by adjusting the scale 5 during use, thereby solving the problem in the prior art that both single-turn adjustment and multi-turn adjustment technologies cannot take into account both adjustment accuracy and clear adjustment gear indication.

[0033] By setting the diameter ratio of the outer adjustment ring 2 and the inner drive ring 3, the reduction ratio of the outer adjustment ring 2 and the inner drive ring 3 is less than or equal to 1:1.4, which can effectively increase the number of rotations of the inner drive ring 3 and thus improve the adjustment accuracy.

[0034] Preferably, the reduction ratio between the outer adjustment ring 2 and the inner drive ring 3 is less than or equal to 1:1.6 and greater than or equal to 1:3, so that the ratio setting of the outer adjustment ring 2 and the inner drive ring 3 is suitable for a miniaturized portable grinder, and the minimum adjustment unit of the adjustment scale 5 is within the controllable range of fine hand operation movements.

[0035] The inner driving ring 3 drives the grinding assembly to move up and down to adjust the gap by cooperating with the thread of the linkage assembly. It can move the inner grinding disc 7 up and down, or it can move the outer grinding disc 6 up and down.

[0036] The linkage assembly includes at least one driving sleeve rod 8, which is threadedly connected to the inner driving ring 3. The inner driving ring 3 is axially limited and arranged in the main body housing 1, and is rotatably arranged relative to the main body housing 1. The driving sleeve rod 8 is rotationally limited and arranged in the main body housing 1, and is relatively axially slidable.

[0037] When the coarse and fine adjustment structure is arranged at the lower end of the main body housing 1, the output end of the driving sleeve rod 8 drives the outer grinding disc 6 to move to adjust the gap.

[0038] When the coarse and fine adjustment structure is arranged at the upper end of the main body housing 1, the output end of the driving sleeve rod 8 drives the inner grinding disc 7 to move and adjust the gap.

[0039] like Figure 3 As shown, as a specific implementation, a mounting bracket 9 and a grinding disc bracket 15 are arranged in the main body housing 1, and the mounting bracket 9 and the grinding disc bracket 15 are respectively integrally formed, and the mounting bracket 9 is fixedly connected to the grinding disc bracket 15. The outer adjustment ring 2 can be selected to be rotatably connected to the main body housing 1 or the mounting bracket 9, and is preferably rotatably connected to the mounting bracket 9. The transmission gear 4 and the inner drive ring 3 are rotatably arranged on the mounting bracket 9, and the drive sleeve rod 8 is axially slidably arranged in the mounting bracket 9. The grinding disc bracket 15 includes an outer grinding disc mounting hole 16 and a connecting shaft mounting hole 17. Two coaxially arranged bearings 18 are arranged in the connecting shaft mounting hole 17, and the connecting shaft 11 is passed through the bearing 18. By arranging the mounting bracket 9 and the grinding disc bracket 15 as one component, the outer adjustment ring 2, the transmission gear 4, the inner drive ring 3 and the drive sleeve rod 8 are all arranged on the mounting bracket 9, which solves the problem of assembly cumulative error caused by multi-stage matching caused by the separation of the mounting parts of each component of the coarseness adjustment structure of the grinder in the prior art.

[0040] like Figure 4As shown, the outer adjustment ring 2 is provided with a rolling groove 12, and the mounting bracket 9 is provided with a first marble assembly 13 that rolls with the rolling groove 12, so that the outer adjustment ring 2 can rotate more stably and smoothly. The mounting bracket 9 is also provided with a second marble assembly 14 that cooperates with the inner tooth ring of the outer adjustment ring 2. The second marble assembly 14 bounces between the inner teeth when the outer adjustment ring 2 rotates, thereby providing sliding resistance for the outer adjustment ring 2 and playing a role in locking and positioning the outer adjustment ring 2.

[0041] As a specific implementation manner, the driving sleeve rod 8 can selectively drive the driving motor 10 to move axially and thereby drive the inner grinding disc 7 to rotate. Specifically, a mounting bracket 9 is arranged in the main body housing 1, and the inner driving ring 3 is rotatably arranged on the mounting bracket 9. A transmission gear 4 mounting seat is arranged on the mounting bracket 9, and the transmission gear 4 is rotatably arranged with the transmission gear 4 mounting seat. The outer adjustment ring 2 is meshed with the inner driving ring 3 through the transmission gear 4, and the inner driving ring 3 is threadedly connected with the driving sleeve rod 8. The driving sleeve rod 8 is slidingly arranged with the mounting bracket 9, and a driving motor 10 mounting cavity is arranged in the driving sleeve rod 8. The driving motor 10 is fixed in the driving sleeve rod 8, and the connecting shaft 11 is fixedly connected to the output end of the driving motor 10, and the other end of the connecting shaft 11 is connected to the inner grinding disc 7.

[0042] Its working principle is to rotate the outer adjustment ring 2, drive the inner drive ring 3 to rotate through the transmission gear 4, and then drive the drive sleeve 8 to move up and down through the threaded cooperation, and the drive sleeve 8 drives the motor, the connecting shaft 11 and the inner grinding disc 7 fixed on the connecting shaft 11 to move up and down.

[0043] As a specific implementation manner, the driving sleeve rod 8 can choose to directly drive the connecting shaft 11 of the inner grinding disc 7 to move. Specifically, a mounting bracket 9 is arranged in the main body housing 1, and the inner driving ring 3 is rotatably arranged on the mounting bracket 9. A transmission gear 4 mounting seat is arranged on the mounting bracket 9. The transmission gear 4 is rotatably arranged with the transmission gear 4 mounting seat, and the outer adjustment ring 2 is rotatably arranged on the mounting bracket 9, and is meshed with the inner driving ring 3 through the transmission gear 4. The mounting bracket 9 is fixed with a driving motor 10, and the output end of the driving motor 10 is connected to the connecting shaft 11, and the driving connecting shaft 11 is driven to rotate. The connecting shaft 11 is axially slidingly arranged with the output end of the driving motor 10, the inner driving ring 3 is threadedly connected to the driving sleeve rod 8, the driving sleeve rod 8 is slidingly arranged with the mounting bracket 9, and one end of the driving sleeve rod 8 is axially fixedly connected with the connecting shaft 11.

[0044] The working principle is that the outer adjusting ring 2 is rotated, and the inner driving ring 3 is driven to rotate through the transmission gear 4, and then the driving sleeve rod 8 is driven to move up and down through the threaded fit, and the driving sleeve rod 8 drives the connecting shaft 11 and the inner grinding disc 7 fixed on the connecting shaft 11 to move up and down. By directly driving the inner grinding disc 7 to move up and down, the defect of fatigue of the adjusting structure and gradual position deviation caused by the adjustment structure driving the motor to move together is solved, which affects the stability of the coarseness of the ground beans.

[0045] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A high-precision externally adjustable coffee bean grinder, comprising a main body housing (1), a grinding assembly and a coarseness and fineness adjustment structure, wherein the coarseness and fineness adjustment structure is used to adjust the grinding gap of the grinding assembly, characterized in that: The coarseness and fineness adjustment structure comprises: An outer adjustment ring (2) is rotatable relative to the main body housing (1), and the outer adjustment ring (2) comprises an inner gear ring; An inner driving ring (3), the inner driving ring (3) drives the grinding assembly to rise and fall to adjust the gap through a linkage assembly, and the inner driving ring (3) comprises an outer gear ring; A transmission gear (4), wherein the outer adjustment ring (2) is meshed with the inner drive ring (3) through the transmission gear (4); The reduction ratio between the outer adjustment ring (2) and the inner drive ring (3) is less than or equal to 1:1.

4.

2. The high-precision external adjustment coffee grinder according to claim 1, characterized in that: The outer adjustment ring (2) and the inner drive ring (3) are coaxially arranged.

3. A high-precision externally adjustable coffee grinder according to claim 1 or 2, characterized in that: The reduction ratio between the outer adjustment ring (2) and the inner drive ring (3) is less than or equal to 1:1.

6.

4. The high-precision externally adjustable coffee grinder according to claim 3, characterized in that: The reduction ratio between the outer adjustment ring (2) and the inner drive ring (3) is less than or equal to 1:1.6 and greater than or equal to 1:

3.

5. The high-precision external adjustment coffee bean grinder according to claim 2, characterized in that: The outer adjustment ring (2) cooperates with the main body housing (1) to be provided with adjustment scales (5) distributed in the circumferential direction.

6. The high-precision external adjustment coffee bean grinder according to claim 2, characterized in that: The grinding assembly comprises an outer grinding disc (6) and an inner grinding disc (7) which are sleeved with each other, and the linkage assembly comprises a driving sleeve rod (8) which is used to drive the outer grinding disc (6) or the inner grinding disc (7) to move axially. The driving sleeve rod (8) is restricted from rotating in the main machine housing (1). The driving sleeve rod (8) is threadedly connected to the inner driving ring (3). When the outer adjustment ring (2) drives the inner driving ring (3) to rotate, the driving sleeve rod (8) is driven to move axially up and down.

7. The high-precision externally adjustable coffee grinder according to claim 6, characterized in that: A mounting bracket (9) is arranged inside the main body housing (1), a driving motor (10) is fixed to the mounting bracket (9), a connecting shaft (11) is arranged on the inner grinding disc (7), an output end of the driving motor (10) is connected to the connecting shaft (11), the connecting shaft (11) is driven to rotate, the connecting shaft (11) and the output end of the driving motor (10) are axially slidably arranged, and one end of the driving sleeve rod (8) is axially fixedly connected to the connecting shaft (11).

8. The high-precision externally adjustable coffee grinder according to claim 7, characterized in that: The outer adjustment ring (2) is rotatably connected to the mounting bracket (9), a transmission gear (4) mounting seat is provided on the mounting bracket (9), and the transmission gear (4) and the transmission gear (4) mounting seat are rotatably arranged.

9. The high-precision externally adjustable coffee grinder according to claim 7, characterized in that: The outer adjustment ring (2) is provided with a rolling groove (12), the mounting bracket (9) is provided with a first marble assembly (13) that rolls with the rolling groove (12), and the mounting bracket (9) is also provided with a second marble assembly (14) that cooperates with the inner tooth ring of the outer adjustment ring (2).

10. The high-precision externally adjustable coffee grinder according to claim 6, characterized in that: The main machine housing (1) is provided with a mounting bracket (9) and a grinding disc bracket (15), the mounting bracket (9) and the grinding disc bracket (15) are respectively integrally formed, the mounting bracket (9) is fixedly connected to the grinding disc bracket (15), the driving sleeve rod (8) is axially slidably arranged in the mounting bracket (9), the grinding disc bracket (15) comprises an outer grinding disc mounting hole (16) and a connecting shaft mounting hole (17), two coaxially arranged bearings (18) are arranged in the connecting shaft mounting hole (17), and the connecting shaft (11) is passed through the bearings (18).

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