A burr assembly for grinding coffee beans

Abstract

This invention provides a burr assembly for grinding coffee beans, including an inner burr and an outer burr sleeve. A first feed groove is obliquely arranged around the outer periphery of the inner burr, and a first grinding groove is arranged around the lower end of the first feed groove. The outer burr sleeve is fitted around the outer periphery of the inner burr, and a second feed groove and a second grinding groove are provided inside the outer burr sleeve, forming a first grinding space and a second grinding space between the outer burr sleeve and the inner burr. Two positioning planes are symmetrically arranged on the outer surface of the outer burr sleeve. By setting the first feed groove and the first grinding groove obliquely around the outer periphery of the inner burr, and cooperating with the second feed groove and the second grinding groove inside the outer burr sleeve, a two-stage progressive grinding space is formed. The first grinding space achieves primary crushing and guiding of the coffee beans, while the second grinding space completes fine grinding. This effectively avoids the problem of uneven grinding particles caused by bean jamming, resulting in finer coffee powder and significantly improving the taste of coffee beverages.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinding technology, specifically to a burr assembly for grinding coffee beans. Background Technology

[0002] Coffee is a popular beverage enjoyed by many, serving as a daily energy boost and improving work efficiency. It's also a common leisure drink, enjoyed at parties or during entertainment. Furthermore, coffee is believed to have benefits such as relieving hangovers and acting as a diuretic. Making coffee requires grinding coffee beans into powder, so a good grinder is crucial for the quality of the coffee powder and also affects the taste of the final product.

[0003] Currently available coffee grinders and automatic coffee grinders often suffer from imperfect grinding blades and tooth groove structures, leading to jamming during bean feeding. This results in uneven grind size, with coarsely ground coffee that negatively impacts the taste and texture of the coffee. Furthermore, the outer blade sleeve is prone to axial displacement after installation, causing coffee grounds to leak into the installation gaps. Utility Model Content

[0004] The purpose of this invention is to provide a blade assembly for grinding coffee beans, which aims to solve the problems in the prior art such as uneven grinding particles, easy axial displacement of the outer blade sleeve after installation with the coffee machine, and easy leakage of powder into the installation gap.

[0005] To achieve the above objectives, this utility model provides a burr assembly for grinding coffee beans, comprising: an inner burr, which is frustoconical in shape, with a first feed groove obliquely surrounding its outer periphery; a first grinding groove surrounding the lower end of the first feed groove; the upper end of the first feed groove being flush with the upper end of the inner burr; the upper end of the first grinding groove being connected to the lower end of the first feed groove; and the lower end of the first grinding groove being located near the bottom of the inner burr; and an outer burr sleeve fitted around the outer periphery of the inner burr, the outer burr sleeve having a first through hole and a second through hole communicating with each other. The inner wall of the first through hole is provided with a second feed groove, and a first grinding space is formed between the second feed groove and the first feed groove. The inner wall of the second through hole is provided with a second grinding groove, and a second grinding space is formed between the second grinding groove and the first grinding groove. The outer side of the outer blade sleeve is symmetrically provided with two positioning planes, and the two positioning planes are located near the upper end of the outer blade sleeve. The bottom of the outer blade sleeve is provided with a first annular flange extending horizontally outward. A second annular flange is provided above the first annular flange at intervals, and an annular groove is provided between the first annular flange and the second annular flange.

[0006] Furthermore, the first feed trough is an inclined trough with an arc, and the second feed trough is a straight trough formed by two intersecting planes.

[0007] Furthermore, both the first and second feed troughs are provided with edge cutting edges on their sides.

[0008] Furthermore, at least a portion of the first grinding groove extends toward the side edge of the first feed groove, and at least a portion of the second grinding groove extends toward the side edge of the second feed groove.

[0009] Furthermore, both the first through hole and the second through hole are tapered through holes, and the smaller diameter end of the first through hole is connected to the smaller diameter end of the second through hole.

[0010] Furthermore, the diameter of the large-diameter end of the first through hole is larger than the diameter of the large-diameter end of the second through hole.

[0011] Furthermore, the inner cutter disc has a vertically extending connecting hole at its center, penetrating its upper and lower end faces.

[0012] The burr assembly for grinding coffee beans provided by this utility model has the following advantages compared to the prior art:

[0013] 1. By setting an inclined first feeding groove and a first grinding groove around the outer periphery of the inner blade disc, and cooperating with the second feeding groove and the second grinding groove set inside the outer blade sleeve, a two-stage progressive grinding space is formed. The first grinding space realizes the primary crushing and guiding of coffee beans, and the second grinding space completes fine grinding. This effectively avoids the problem of uneven grinding particles caused by bean jamming, making the coffee powder finer and significantly improving the taste of coffee beverages.

[0014] 2. The symmetrical positioning planes on the outer side of the outer blade sleeve are precisely matched with the coffee machine mounting structure. Combined with the double limiting structure formed by the first and second annular flanges at the bottom, it can prevent the outer blade sleeve from axially displacing during the grinding process, which helps to improve the axial stability of the blade assembly.

[0015] 3. The annular groove between the first and second annular flanges forms a multi-layer sealing structure, which provides a better sealing effect during grinding, making it less likely for coffee powder to accumulate and effectively preventing equipment wear and cleaning problems caused by coffee powder entering the installation gap. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a burr assembly for grinding coffee beans according to the present invention;

[0017] Figure 2 This is an exploded view of a burr assembly for grinding coffee beans according to the present invention.

[0018] Figure 3 This is a vertical cross-sectional view of a burr assembly for grinding coffee beans according to this utility model.

[0019] Explanation of reference numerals in the attached figures

[0020] 10-Inner cutter head; 11-First feed groove; 12-First grinding groove; 13-Coupling hole;

[0021] 20-Outer blade sleeve; 201-First through hole; 202-Second through hole; 21-Second feed groove; 22-Second grinding groove; 23-Positioning plane; 24-First annular flange; 25-Second annular flange; 26-Annular groove;

[0022] 30 - First grinding space; 31 - Second grinding space; 32 - Groove edge. Detailed Implementation

[0023] The present invention will be described in detail below with reference to specific embodiments.

[0024] In this utility model, when directional terms appear, they are used to facilitate the description of this utility model and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, when terms such as "set in," "connected," or "linked" appear, these terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figures 1 to 3 As shown, a burr assembly for grinding coffee beans includes an inner burr 10 and an outer burr sleeve 20.

[0027] The inner cutter disc 10 is frustum-shaped. A first feed groove 11 is inclinedly arranged around the outer periphery of the inner cutter disc 10. A first grinding groove 12 is arranged around the lower end of the first feed groove 11. The upper end of the first feed groove 11 is flush with the upper end of the inner cutter disc 10. The upper end of the first grinding groove 12 is connected to the lower end of the first feed groove 11. The lower end of the first grinding groove 12 is located near the bottom of the inner cutter disc 10.

[0028] An outer blade sleeve 20 is fitted around the outer periphery of the inner blade disc 10. The outer blade sleeve 20 has a first through hole 201 and a second through hole 202 that are connected. A second feed groove 21 surrounds the inner wall of the first through hole 201, forming a first grinding space 30 between the second feed groove 21 and the first feed groove 11. A second grinding groove 22 is formed on the inner wall of the second through hole 202, forming a second grinding space 31 between the second grinding groove 22 and the first grinding groove 12. The gap between the first grinding space 30 and the second grinding space 31 is larger than the gap between the second grinding space 31, thus forming a two-stage progressive grinding space. The first grinding space 30 performs primary crushing and guiding of the coffee beans, while the second grinding space 31 performs fine grinding, effectively avoiding uneven grinding particles caused by bean jamming, resulting in finer coffee powder and significantly improved coffee flavor.

[0029] The outer blade sleeve 20 has two symmetrical positioning planes 23 on its outer side. The two positioning planes 23 are located close to the upper end of the outer blade sleeve 20, so that they can be precisely matched with the installation structure of the coffee machine, preventing the outer blade sleeve 20 from axially displacing during the grinding process, and helping to improve the axial stability of the blade assembly.

[0030] The bottom of the outer blade sleeve 20 is provided with a first annular flange 24 extending horizontally outward. Above the first annular flange 24, a second annular flange 25 is provided at a distance. An annular groove 26 is provided between the first annular flange 24 and the second annular flange 25. This annular groove 26 is used to install an annular sealing ring, thereby achieving a more secure connection with the coffee machine. Moreover, the annular groove 26 between the first annular flange 24 and the second annular flange 25 forms a labyrinth-like sealing structure, which, together with the annular sealing ring, forms a multi-layer sealing structure. This provides a better sealing effect during grinding, prevents coffee powder from accumulating, and effectively avoids equipment wear and cleaning problems caused by coffee powder entering the installation gap.

[0031] In this embodiment, the first feed trough 11 is an inclined trough with an arc, and the second feed trough 21 is a straight trough formed by two intersecting planes, so that there is a large gap between the first feed trough 11 and the second feed trough 21, which facilitates the smooth falling of coffee beans.

[0032] In this embodiment, both the first feed trough 11 and the second feed trough 21 are provided with trough edge blades 32 on their sides for primary crushing and guiding of coffee beans falling into the first grinding space 30.

[0033] In this embodiment, at least a portion of the first grinding groove 12 extends toward the side edge of the first feeding groove 11, and at least a portion of the second grinding groove 22 extends toward the side edge of the second feeding groove 21, for grinding and transitioning the crushed coffee bean particles so that they can enter the second grinding space 31 for fine grinding.

[0034] In this embodiment, both the first through hole 201 and the second through hole 202 are tapered through holes, with the smaller diameter end of the first through hole 201 connected to the smaller diameter end of the second through hole 202. The larger diameter end of the first through hole 201 is larger than the larger diameter end of the second through hole 202, facilitating the entry of coffee beans and the exit of coffee powder.

[0035] In this embodiment, the inner blade disc has a vertically extending connecting hole 13 through its upper and lower end faces at its center. The connecting hole 13 is used to connect the motor shaft of the coffee grinder.

[0036] Where there is no conflict, the above embodiments and features can be combined with each other.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A burr assembly for grinding coffee beans, characterized in that, include: An inner cutter disc, which is frustum-shaped, has a first feed groove arranged obliquely around its outer periphery. A first grinding groove is arranged around the lower end of the first feed groove. The upper end of the first feed groove is flush with the upper end of the inner cutter disc. The upper end of the first grinding groove is connected to the lower end of the first feed groove. The lower end of the first grinding groove is located near the bottom of the inner cutter disc. An outer blade sleeve is fitted around the outer periphery of the inner blade disc. The inner side of the outer blade sleeve is provided with a first through hole and a second through hole that are connected. The inner wall of the first through hole is surrounded by a second feed groove. A first grinding space is formed between the second feed groove and the first feed groove. The inner wall of the second through hole is provided with a second grinding groove. A second grinding space is formed between the second grinding groove and the first grinding groove. The outer side of the outer blade sleeve is symmetrically provided with two positioning planes, which are located near the upper end of the outer blade sleeve. The bottom of the outer blade sleeve is provided with a first annular flange extending horizontally outward, and a second annular flange is provided above the first annular flange at intervals. An annular groove is provided between the first annular flange and the second annular flange.

2. The burr assembly for grinding coffee beans according to claim 1, characterized in that, The first feed trough is an inclined trough with an arc, and the second feed trough is a straight trough formed by two intersecting planes.

3. The burr assembly for grinding coffee beans according to claim 2, characterized in that, Both the first and second feed troughs have edge cutting edges on their sides.

4. The burr assembly for grinding coffee beans according to claim 1, characterized in that, The first grinding groove extends at least a portion toward the side edge of the first feed groove, and the second grinding groove extends at least a portion toward the side edge of the second feed groove.

5. The burr assembly for grinding coffee beans according to claim 1, characterized in that, Both the first through hole and the second through hole are tapered through holes, and the smaller diameter end of the first through hole is connected to the smaller diameter end of the second through hole.

6. The burr assembly for grinding coffee beans according to claim 5, characterized in that, The diameter of the large-diameter end of the first through hole is larger than the diameter of the large-diameter end of the second through hole.

7. The burr assembly for grinding coffee beans according to claim 1, characterized in that, The inner cutter disc has a vertically extending connecting hole at its center, penetrating its upper and lower end faces.

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