Grinding structure of a high-precision coffee bean grinder

Abstract

This utility model discloses a grinding structure for a high-precision coffee bean grinder, including a motor. A bean feeding shaft is fixedly connected to the output shaft at the front end of the motor. An inner grinding blade assembly is fixed outside the bean feeding shaft. A cavity is fixed to the front end of the motor, and an adjusting seat is fixed to the front end of the cavity. A threaded adjusting disc is connected to the front end of the adjusting seat via a threaded connection. A scale indicator is fixed outside the threaded adjusting disc. A blade holder is placed inside the adjusting seat. The front end of the blade holder abuts against the rear end of the threaded adjusting disc, and an outer grinding blade assembly is fixed to the rear end of the blade holder, located in front of the inner grinding blade assembly. This utility model uses a rotating inner grinding blade assembly. The short motor output shaft can meet the perpendicularity requirements of the rotor shaft. The outer grinding blade assembly can move back and forth, thereby adjusting the gap between the inner and outer grinding blade assemblies and thus adjusting the coarseness of the coffee bean grind. The guide post and spring settings ensure a high degree of concentricity between the inner and outer grinding blade assemblies, resulting in uniform coffee bean grinding.

Description

Technical Field

[0001] This utility model relates to the field of coffee bean grinder technology, specifically a grinding structure for a high-precision coffee bean grinder. Background Technology

[0002] Existing high-precision coffee grinders use a fixed inner grinding blade, with a motor shaft driving an outer grinding blade to rotate and grind the beans. The outer grinding blade can move back and forth on the motor shaft to adjust the grind size. However, due to the relatively long motor shaft, the rotor shaft's perpendicularity may not meet high-precision requirements after assembly. Furthermore, there is a gap between the outer grinding blade and the motor shaft, resulting in insufficient parallelism between the inner and outer grinding blades, leading to uneven coffee bean grinding and ultimately affecting the stability of coffee extraction. Utility Model Content

[0003] In view of the above-mentioned defects in the prior art, the purpose of this utility model is to provide a grinding structure for a high-precision coffee bean grinder.

[0004] The technical solution of this utility model is: a grinding structure for a high-precision coffee bean grinder, including a motor, a bean feeding shaft fixedly connected to the output shaft at the front end of the motor, an inner grinding blade assembly fixed outside the bean feeding shaft, a cavity shell fixed at the front end of the motor, an adjustment seat fixed at the front end of the cavity shell, a threaded adjustment disc connected to the front end of the adjustment seat by a threaded connection, a scale indicator disc fixed outside the threaded adjustment disc, a blade holder placed inside the adjustment seat, the front end of the blade holder abutting against the rear end of the threaded adjustment disc, and an outer grinding blade assembly fixed at the rear end of the blade holder in front of the inner grinding blade assembly, with a gap between the inner grinding blade assembly and the outer grinding blade assembly.

[0005] Furthermore, the front end of the cavity shell is fixed with multiple guide posts extending forward and backward, and each guide post is fitted with a spring extending forward and backward, which is locked between the cavity shell and the tool holder.

[0006] Furthermore, the outer edge of the tool holder has a number of through holes equal to the number of guide pins, and the guide pins pass through the through holes and slide back and forth with the through holes.

[0007] Furthermore, the upper end of the blade holder has a feed inlet located above the bean feeding shaft, the lower end of the cavity shell has a discharge outlet, and the inner grinding blade assembly and the outer grinding blade assembly are located above the discharge outlet.

[0008] Furthermore, the front end of the adjusting seat has an internal threaded hole, and the rear end of the threaded adjusting disc has an external threaded part, which is screwed into the internal threaded hole.

[0009] The advantages of the grinding structure of the high-precision coffee bean grinder provided by this utility model are as follows: it adopts a method in which the inner grinding blade group rotates while the outer grinding blade group does not rotate; the motor output shaft is relatively short, which can meet the verticality requirements of the rotor shaft; the outer grinding blade group can move back and forth, thereby adjusting the gap between the inner and outer grinding blade groups and thus adjusting the coarseness of the coffee bean grind; the setting of multiple guide pillars and springs ensures that the inner and outer grinding blade groups have a high degree of concentricity while the outer grinding blade group is adjusted back and forth, thereby making the coffee bean grind uniform. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the present invention;

[0012] Figure 3 This is an exploded view of the present invention.

[0013] In the figure: 1—motor, 2—bean feeding shaft, 3—internal grinding blade assembly, 4—cavity shell, 41—discharge port, 5—adjusting seat, 51—internal threaded hole, 6—threaded adjustment disc, 61—external threaded part, 7—scale indicator disc, 8—blade holder, 81—through hole, 82—feed inlet, 9—external grinding blade assembly, 10—guide post, 11—spring. Detailed Implementation

[0014] To provide a more intuitive and complete understanding of the technical solution of this utility model, the following non-limiting features are described in conjunction with the accompanying drawings:

[0015] like Figure 1 — Figure 3 As shown, a high-precision coffee bean grinder's grinding structure includes a motor 1. A bean feeding shaft 2 is fixedly connected to the output shaft at the front end of the motor 1. An inner grinding blade assembly 3 is fixed at the rear end of the bean feeding shaft 2. A cavity shell 4 is fixed to the front end of the motor 1. An adjusting seat 5 is fixed to the front end of the cavity shell 4 by screws. A threaded adjusting disc 6 is connected to the front end of the adjusting seat 5 by a threaded connection. A scale indicator disc 7 is fixed to the outside of the threaded adjusting disc 6. A blade holder 8 is placed inside the adjusting seat 5. The front end of the blade holder 8 abuts against the rear end of the threaded adjusting disc 6. An outer grinding blade assembly 9 is fixed to the rear end of the blade holder 8, located in front of the inner grinding blade assembly 3. A gap is left between the inner grinding blade assembly 3 and the outer grinding blade assembly 9. Both the inner grinding blade assembly 3 and the outer grinding blade assembly 9 extend into the cavity shell 4.

[0016] like Figure 3As shown, a plurality of guide posts 10 extending forward and backward are fixed along the circumference at the front end of the cavity shell 4, and each guide post 10 is fitted with a spring 11 extending forward and backward. The spring 11 is engaged between the cavity shell 4 and the tool holder 8. When the tool holder 8 moves backward, the spring 11 is compressed. The spring 11 is provided to facilitate the reset of the tool holder 8. The number of guide posts 10 and springs 11 is preferably four.

[0017] like Figure 3 As shown, in order to enable the tool holder 8 to move back and forth stably, the outer edge of the tool holder 8 has a number of through holes 81 equal to the number of guide posts 10. The guide posts 10 pass through the through holes 81 and slide back and forth with the through holes 81.

[0018] like Figure 2 As shown, the upper end of the blade holder 8 has a feed inlet 82 located above the bean feeding shaft 2, and the lower end of the cavity shell 4 has a discharge outlet 41. The inner grinding blade assembly 3 and the outer grinding blade assembly 9 are located above the discharge outlet 41. Coffee beans are fed in through the feed inlet 82, pass through the bean feeding shaft 2 between the inner grinding blade assembly 3 and the outer grinding blade assembly 9, and are then ground before exiting through the discharge outlet 41. The gap between the inner grinding blade assembly 3 and the outer grinding blade assembly 9 is connected to the feed inlet 82.

[0019] like Figure 3 As shown, the adjusting seat 5 has an internal threaded hole 51 at its front end, and the threaded adjusting disc 6 has an external threaded part 61 at its rear end, which is screwed into the internal threaded hole 51. Through the cooperation between the external threaded part 61 and the internal threaded hole 51, the threaded adjusting disc 6 can move back and forth. A scale is provided on the scale indicator disc 7 (not shown in the figure).

[0020] The present invention provides a grinding structure for a high-precision coffee bean grinder. It employs an inner grinding blade assembly 3 that rotates while the outer grinding blade assembly 9 remains stationary. The motor 1 has a short output shaft, which satisfies the perpendicularity requirements of the rotor shaft. The outer grinding blade assembly 9 can move back and forth, thereby adjusting the gap between the inner and outer grinding blade assemblies 3 and thus the coarseness of the coffee bean grind. The arrangement of multiple guide pillars 10 and springs 11 ensures a high degree of concentricity between the inner and outer grinding blade assemblies 3 and 9 while the outer grinding blade assembly 9 is being adjusted back and forth, resulting in uniform coffee bean grinding.

[0021] Of course, the above are only preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any simple modifications and equivalent structural changes made based on the contents of the present utility model specification and drawings should also be included within the patent protection scope of the present utility model.

Claims

1. A grinding structure for a high-precision coffee bean grinder, comprising a motor, wherein a bean feeding shaft is fixedly connected to the output shaft at the front end of the motor, characterized in that: An internal grinding blade assembly is fixed to the outside of the bean feeding shaft. A cavity shell is fixed to the front end of the motor. An adjustment seat is fixed to the front end of the cavity shell. A threaded adjustment disc is connected to the front end of the adjustment seat by a threaded connection. A scale indicator is fixed to the outside of the threaded adjustment disc. A blade holder is placed inside the adjustment seat. The front end of the blade holder abuts against the rear end of the threaded adjustment disc. An external grinding blade assembly is fixed to the rear end of the blade holder in front of the internal grinding blade assembly. A gap is left between the internal grinding blade assembly and the external grinding blade assembly.

2. The grinding structure of a high-precision coffee bean grinder according to claim 1, characterized in that: The front end of the cavity shell is fixed with multiple guide posts that extend forward and backward. Each guide post is fitted with a spring that extends forward and backward, and the spring is locked between the cavity shell and the tool holder.

3. The grinding structure of a high-precision coffee bean grinder according to claim 2, characterized in that: The outer edge of the tool holder has through holes equal in number to the number of guide pins. The guide pins pass through the through holes and slide back and forth with the through holes.

4. The grinding structure of a high-precision coffee bean grinder according to claim 1, characterized in that: The upper end of the blade holder has a feed inlet located above the bean feeding shaft, and the lower end of the cavity shell has a discharge outlet. The inner grinding blade assembly and the outer grinding blade assembly are located above the discharge outlet.

5. The grinding structure of a high-precision coffee bean grinder according to claim 1, characterized in that: The front end of the adjusting seat has an internal threaded hole, and the rear end of the threaded adjusting disc has an external threaded part, which is screwed into the internal threaded hole.

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