Bean grinder

Abstract

The utility model relates to a bean grinder which comprises a bean grinder body, a bean bin is arranged on the bean grinder body, the bean bin is provided with a powder cavity, a lower cutter and a powder stirring piece are arranged in the powder cavity, and the bean grinder body is further provided with a first driving motor and a second driving motor which respectively and independently drive a main shaft and the powder stirring piece to rotate. The first driving motor and the second driving motor are arranged to independently drive the main shaft and the powder stirring piece respectively, so that the rotating speed of the powder stirring piece is kept constant, bean flour in the powder cavity can be pushed out at the optimal speed without residues, and meanwhile, the second driving motor can be controlled to freely adjust the rotating speed of the lower cutter according to the requirement for the size of bean flour particles.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee bean grinders, in particular to a coffee bean grinder. Background Art

[0002] The lower knife and powder paddle of traditional coffee bean grinders are fixed on the main shaft, which drives the lower knife and the powder paddle to rotate at the same time. The speed of the lower knife and the powder paddle changes with the speed of the main shaft, and the speed of the lower knife and the powder paddle cannot be adjusted independently. When the speed of the lower knife is reduced, the speed of the powder paddle also decreases, resulting in insufficient centrifugal force of the powder paddle, and the bean powder is not easily pushed out of the powder chamber, resulting in low powder output efficiency. Utility Model Content

[0003] The utility model aims to provide a coffee bean grinder, wherein the lower knife and the powder stirring piece rotate separately, and the rotation speed of the lower knife can be freely adjusted while the rotation speed of the powder stirring piece is maintained.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A bean grinder comprises a bean grinder body, wherein the bean grinder body is provided with a bean bin, the bean bin has a powder cavity, a lower knife and a powder stirring piece are arranged in the powder cavity, and the bean grinder body is further provided with a first drive motor and a second drive motor which independently drive a main shaft and the powder stirring piece to rotate.

[0006] As a preferred solution, a main shaft is provided at the output end of the first driving motor, and the main shaft extends into the powder chamber and is connected to the lower knife drive.

[0007] As a preferred solution, a turntable is provided at one end of the main shaft extending into the powder chamber, and the lower knife is detachably arranged on the turntable.

[0008] As a preferred solution, the central axes of the lower knife, the powder removing member and the main shaft are located on the same straight line.

[0009] As a preferred solution, a powder outlet is provided on the side wall of the powder chamber, and a powder removing block extending radially outward is provided on the outer side wall of the powder removing member.

[0010] As a preferred solution, the powder-digging block extends upward to the peripheral side of the lower knife.

[0011] As a preferred embodiment, the powder removing member is annular, and is provided with an extension portion extending downward, the bean bin is provided with a first clearance groove corresponding to the extension portion, the outer side wall of the extension portion is provided with external teeth, and the output end of the second drive motor is provided with a gear, and the second drive motor drives the powder removing member to rotate through the engagement of the gear with the external teeth.

[0012] As a preferred solution, a mounting groove for mounting a second driving motor is provided at the lower end of the bean bin, a second clearance groove corresponding to the gear is provided in the mounting groove, a clearance notch connected to the first clearance groove is provided on one side of the second clearance groove, and a part of the gear is exposed from the clearance notch and meshes with the external teeth.

[0013] As a preferred solution, a first bearing is provided on the inner side of the extension portion, and the extension portion is rotatably connected to the bean bin via the first bearing.

[0014] As a preferred solution, a second bearing is provided on the main shaft, and the main shaft is rotatably connected to the bean bin via the second bearing.

[0015] Beneficial effects of the utility model:

[0016] The utility model arranges a first drive motor and a second drive motor to independently drive the main shaft and the powder plucking member, so that the rotation speed of the powder plucking member remains constant, and the bean powder in the powder chamber can be pushed out at an optimal speed without residue. At the same time, the second drive motor can be controlled to freely adjust the rotation speed of the lower knife according to the size requirements of the bean powder particles.

[0017] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a bean bin according to an embodiment of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0021] Figure 4 This is a front side view of a bean bin according to an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the bottom structure of a bean bin according to an embodiment of the utility model.

[0023] Description of the accompanying drawings:

[0024] 10-bean bin; 11-powder chamber; 12-powder outlet;

[0025] 13-first clearance groove; 14-installation groove; 15-second clearance groove;

[0026] 16-gap; 20-spindle; 21-turntable;

[0027] 30-lower knife; 40-powdering piece; 41-powdering block;

[0028] 42-extension portion; 421-external teeth; 50-first drive motor;

[0029] 60-second drive motor; 61-gear; 70-first bearing;

[0030] 80-Second bearing. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the present invention, 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, 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 invention can be understood according to the specific circumstances.

[0033] like Figure 1-5 As shown, the utility model discloses a bean grinder, including a bean grinder body, a bean bin 10 is provided on the bean grinder body, the bean bin 10 has a powder chamber 11, a lower knife 30 and a powder-pulling member 40 are provided in the powder chamber 11, and the bean grinder body is also provided with a first drive motor 50 and a second drive motor 60 that independently drive the main shaft 20 and the powder-pulling member 40 to rotate. By arranging the first drive motor 50 and the second drive motor 60 to independently drive the main shaft 20 and the powder-pulling member 40, the rotation speed of the powder-pulling member 40 is kept constant, and the bean powder in the powder chamber 11 can be pushed out at an optimal speed without residue. At the same time, the second drive motor 60 can be controlled to freely adjust the rotation speed of the lower knife 30 according to the size requirements of the bean powder particles.

[0034] The output end of the first driving motor 50 is provided with a main shaft 20, the main shaft extends into the powder chamber 11 and is drivingly connected to the lower knife 30, and one end of the main shaft 20 extending into the powder chamber 11 is provided with a rotating disk 21, and the lower knife 30 is detachably arranged on the rotating disk 21. In this embodiment, the central axes of the lower knife 30, the powder moving member 40 and the main shaft 20 are located on the same straight line.

[0035] The side wall of the powder chamber 11 is provided with a powder outlet 12, the outer side wall of the powder plucking member 40 is provided with a powder plucking block 41 extending radially outward, the powder plucking block 41 extends upward to the peripheral side of the lower knife 30, the powder plucking member 40 is annular, and the powder plucking member 40 is provided with an extension portion 42 extending downward, the bean bin 10 is provided with a first give way groove 13 corresponding to the extension portion 42, the outer side wall of the extension portion 42 is provided with external teeth 421, the output end of the second drive motor 60 is provided with a gear 61, and the second drive motor 60 drives the powder plucking member 40 to rotate through the engagement of the gear 61 with the external teeth 421.

[0036] In this embodiment, a mounting groove for mounting the second drive motor 60 is provided at the lower end of the bean bin 10, a second clearance groove 15 corresponding to the gear 61 is provided in the mounting groove, a clearance notch 16 communicating with the first clearance groove 13 is provided on one side of the second clearance groove 15, a part of the gear 61 is exposed from the clearance notch 16 and meshes with the external teeth 421, a first bearing 70 is provided on the inner side of the extension part 42, and the extension part 42 is rotatably connected to the bean bin 10 through the first bearing 70. In this embodiment, the first bearing 70 is a radial bearing.

[0037] The main shaft 20 is provided with a second bearing 80, and the main shaft 20 is rotatably connected to the bean bin 10 via the second bearing 80. In this embodiment, the second bearing 80 is a thrust bearing.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical practice of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A coffee bean grinder, comprising a coffee bean grinder body, characterized in that: The bean grinder body is provided with a bean bin, which has a powder cavity, in which a lower knife and a powder-pulling member are provided, and the bean grinder body is further provided with a first drive motor and a second drive motor which independently drive the main shaft and the powder-pulling member to rotate.

2. A coffee bean grinder according to claim 1, characterized in that: The output end of the first driving motor is provided with a main shaft, and the main shaft extends into the powder chamber and is connected to the lower knife drive.

3. A coffee bean grinder according to claim 2, characterized in that: A rotating disk is arranged at one end of the main shaft extending into the powder chamber, and the lower knife is detachably arranged on the rotating disk.

4. The coffee bean grinder according to claim 2, characterized in that: The central axes of the lower knife, the powder plucking member and the main shaft are located on the same straight line.

5. The coffee bean grinder according to claim 1, characterized in that: The side wall of the powder cavity is provided with a powder outlet, and the outer side wall of the powder-digging piece is provided with a powder-digging block extending radially outward.

6. The coffee bean grinder according to claim 5, characterized in that: The powder-digging block extends upward to the peripheral side of the lower knife.

7. The coffee bean grinder according to claim 1, characterized in that: The powder plucking piece is annular, and is provided with an extension portion extending downward, the bean bin is provided with a first give way groove corresponding to the extension portion, the outer side wall of the extension portion is provided with external teeth, the output end of the second drive motor is provided with a gear, and the second drive motor drives the powder plucking piece to rotate by meshing the gear with the external teeth.

8. The coffee bean grinder according to claim 7, characterized in that: The lower end of the bean bin is provided with an installation groove for installing a second drive motor, and a second give way groove corresponding to the gear is provided in the installation groove, and a give way notch connected to the first give way groove is provided on one side of the second give way groove, and a part of the gear is exposed from the give way notch and meshes with the external teeth.

9. The coffee bean grinder according to claim 7, characterized in that: A first bearing is provided on the inner side of the extension part, and the extension part is rotatably connected to the bean bin via the first bearing.

10. The coffee bean grinder according to claim 2, characterized in that: The main shaft is provided with a second bearing, and the main shaft is rotatably connected to the bean bin via the second bearing.

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