CN112438625B

CN112438625B - Grinding device

Info

Publication number: CN112438625B
Application number: CN201910801877.3A
Authority: CN
Inventors: 魏浩展
Original assignee: Tsann Kuen Zhangzhou Enterprise Co Ltd
Current assignee: Tsann Kuen Zhangzhou Enterprise Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2022-02-18
Anticipated expiration: 2039-08-28
Also published as: CN112438625A; TWI725781B; TW202108058A

Abstract

A grinding device is suitable for grinding an object to be ground and comprises a rotating shaft unit, a knife sharpening unit and a supporting unit, wherein the knife sharpening unit penetrates through the rotating shaft unit and can be driven by the rotating shaft unit to grind the object to be ground, and the supporting unit supports the rotating shaft unit and the knife sharpening unit. The supporting unit is made of conductive composition and is combined with the knife sharpening unit in an injection molding way. Because the supporting unit is made of the conductive composition which can conduct electricity, the situation of charge accumulation can be improved, and the problems of flying powder and residual powder caused by charge accumulation can be solved.

Description

Grinding device

Technical Field

The present invention relates to food processing machines, and more particularly to a grinding apparatus for grinding an object to be ground, such as coffee beans.

Background

A typical bean grinder is adapted to grind coffee beans into coffee powder. The bean grinder generally includes a supporting unit made of non-conductive plastic, a rotating shaft unit passing through the supporting unit, and a sharpening unit clamped to the supporting unit and driven by the rotating shaft unit for grinding coffee beans.

When the sharpening unit is driven to rotate by the rotating shaft unit, the coffee beans can be ground into coffee powder. However, during the grinding process, the coffee beans continuously rub against the sharpening unit, which causes a large amount of charges to accumulate on the surfaces of the supporting unit and the coffee powder, and the coffee powder is likely to adhere to the supporting unit under the action of static electricity and remain in the bean grinder, resulting in insufficient powder output of the coffee powder ground by the bean grinder or powder flying phenomenon that the powder flies due to electrostatic repulsion. In addition, the coffee powder remaining in the bean grinder in the previous time is mixed with the freshly ground coffee powder after being deteriorated, and the flavor of the brewed coffee is also affected.

Disclosure of Invention

The object of the present invention is to provide a grinding device which overcomes at least the disadvantages of the background art.

The grinding device is suitable for grinding an object to be ground and comprises a rotating shaft unit, a knife sharpening unit and a supporting unit, wherein the knife sharpening unit is sleeved on the rotating shaft unit and can be driven by the rotating shaft unit to grind the object to be ground, and the supporting unit supports the rotating shaft unit and the knife sharpening unit. The supporting unit is made of conductive composition and is combined with the knife sharpening unit in an injection molding way.

The grinding device comprises a rotating shaft unit, a grinding unit and a supporting unit, wherein the rotating shaft unit comprises a top shaft part and a bottom shaft part which are opposite to each other, and a connecting shaft part connected between the top shaft part and the bottom shaft part, the grinding unit comprises an inner grinding cutter which is sleeved on the connecting shaft part and can be driven to rotate, and an outer grinding cutter which surrounds the inner grinding cutter and can be matched with the inner grinding cutter to grind an object to be ground, the supporting unit comprises a top seat and a base which are made of conductive compositions and sleeved outside the top shaft part and the bottom shaft part and can be matched with the top seat and the base to support the rotating shaft unit, and the top seat is combined with the outer grinding cutter in an injection molding mode to support the outer grinding cutter.

The supporting unit of the grinding device further comprises a top bearing and a bottom bearing which can conduct electricity and are respectively sleeved on the top shaft part and the bottom shaft part in a penetrating mode, the top bearing is located between the top shaft part and the top base, the bottom bearing is located between the bottom shaft part and the base, the top base is further combined with the top bearing in an injection molding mode, and the base is combined with the bottom bearing in an injection molding mode.

In the grinding device of the present invention, the supporting unit further includes a tool post penetrating the connecting shaft portion and located between the connecting shaft portion and the inner grinding blade, and the tool post is made of the conductive composition and is combined with the inner grinding blade in an injection molding manner.

The conductive composition comprises a plastic component and a conductive component, wherein the plastic component is at least one of nylon plastics, polypropylene, polycarbonate, polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, high-density polyethylene, polyformaldehyde, polybutylene terephthalate and the group consisting of the materials, and the conductive component is at least one of metal, conductive carbon fiber, graphite, a conductive carbon nano tube, a conductive polymer and the group consisting of the materials.

The grinding device comprises 65 wt% -90 wt% of plastic component and 10 wt% -35 wt% of conductive component, wherein the total weight of the conductive component is 100 wt%.

In the polishing apparatus of the present invention, the conductive composition is a conductive polymer.

In the polishing apparatus of the present invention, the supporting unit further includes an electrical wire electrically connected to the top base.

The invention has the beneficial effects that: the supporting unit is made of conductive composition which can conduct electricity, and the knife sharpening unit is combined with the supporting unit by embedding injection molding, so that elements are tightly combined without gaps, and an environment without electrical impedance is created, therefore, static charges generated in the grinding process can be rapidly discharged out of a grinding cavity body by the supporting unit and the knife sharpening unit, and the problems of flying powder, residual powder and the like which are derived from charge accumulation are solved.

Drawings

Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view illustrating a grinding apparatus of the present invention mounted in a housing of a bean grinder and assembled to a driving apparatus;

FIG. 2 is an exploded perspective view of the embodiment, and illustrates the components which are forced apart and are otherwise held together by injection molding for ease of understanding;

FIG. 3 is a sectional view of the embodiment; and

fig. 4 is a sectional view illustrating an assembly method of the embodiment.

Detailed Description

Referring to fig. 1 and 2, an embodiment of a grinding apparatus 10 of the present invention is adapted to grind an object to be ground (e.g., coffee beans) into a ground object (e.g., coffee powder). The grinding device 10 is adapted to be mounted in a mounting housing 101 of a bean grinder and can be driven by a driving device (not shown) of the bean grinder. Since the structure and assembly relationship of the mounting housing 101 and the driving device are not important in the present application and are common knowledge, they will not be described herein.

Referring to fig. 2 and 3, the grinding device 10 includes a rotating shaft unit 1 driven by the driving device to rotate, a knife sharpening unit 2 sleeved on the rotating shaft unit 1, and a supporting unit 3 made of conductive composition and supporting the rotating shaft unit 1 and the knife sharpening unit 2.

The rotating shaft unit 1 includes a rotating shaft 11 made of metal and extending up and down along an axis L, and a conical top sleeve 12 sleeved on the top of the rotating shaft 11 and adapted to be inserted into the driving device.

The rotation shaft 11 includes a cylindrical top shaft 111 and a bottom shaft 112 with a smaller radial width, which are vertically spaced from each other along the axis L, and the top shaft 111 penetrates the top sleeve 12, and a connecting shaft 113 integrally connected between the top shaft 111 and the bottom shaft 112.

The sharpening unit 2 is made of metal and includes an inner sharpening blade 21 sleeved on the connecting shaft portion 113 of the rotation shaft 11 and capable of being driven by the rotation shaft 11 to rotate, an outer sharpening blade 22 surrounding the inner sharpening blade 21 at intervals and capable of grinding the object to be ground in cooperation with the inner sharpening blade 21, and a ring sleeve 23 sleeved outside the outer sharpening blade 22.

The inner grinding burr 21 is generally frusto-conical and has an inner flank 211 facing the outer grinding burr 22.

The outer grinding blade 22 has an outer blade surface 221 facing the inner grinding blade 21 and defining a grinding space 24 together with the inner blade surface 211, and an annular connecting surface 222 extending radially outward from a top edge of the outer blade surface 221.

Before beginning the description of the supporting unit 3, the reader should understand that the above-mentioned "the supporting unit 3 is mainly made of conductive composition" means that most of the components of the supporting unit 3 are made of conductive composition, but some of the components are made of metal. However, in other embodiments of the present invention, each element of the supporting unit 3 can be made of the conductive composition, or each element of the supporting unit 3 can be made of the conductive composition, that is, the material of each element of the supporting unit 3 is the conductive composition, but can contain other possible additives.

The supporting unit 3 includes a top bearing 31 penetrating the top shaft 111 of the rotation shaft 11, a bottom bearing 32 penetrating the bottom shaft 112 of the rotation shaft 11, a tool post 33 penetrating the connecting shaft 113 of the rotation shaft 11 and connecting to the inner grinding blade 21, a positioning ring 34 penetrating the connecting shaft 113 and located below the tool post 33, a base 35 penetrating the bottom shaft 112 of the rotation shaft 1 and extending to surround the outer grinding blade 22, a top base 36 penetrating the top shaft 111 of the rotation shaft 1 and connecting to the outer grinding blade 22 and surrounding the base 35, and an electrical wire 37 electrically connected to the top base 36.

The top bearing 31 and the bottom bearing 32 are both made of metal. The top bearing 31 is located between the top shaft portion 111 and the top base 36, and the bottom bearing 32 is located between the bottom shaft portion 112 and the base 35, and can cooperate with the top bearing 31 to allow the rotation shaft 11 to rotate relative to the base 35 and the top base 36.

The tool seat 33 is made of a conductive composition, tightly fitted over the connecting shaft 113 of the rotation shaft 11, and combined with the inner grinding blade 21 in an injection molding manner, so that the tool seat cannot be detached from the inner grinding blade 21 and tightly attached to the inner grinding blade 21.

The tool holder 33 includes a disc portion 331 and a column portion 332, which is hollow and cylindrical, and is inserted through the connecting shaft portion 113 of the rotation shaft 11 and integrally connected with the disc portion 331.

The conductive composition comprises a plastic component and a conductive component doped in the plastic component. The plastic component accounts for 70 wt% and the conductive component accounts for 30 wt% of the total weight of the conductive composition of 100 wt%.

The plastic component can be selected from, but not limited to, at least one of Nylon (Nylon) plastic, Polypropylene (PP), Polycarbonate (PC), Polystyrene (PS), acrylonitrile-styrene copolymer (SAN), acrylonitrile-butadiene-styrene copolymer (ABS), High Density Polyethylene (HDPE), Polyoxymethylene (POM), Polybutylene terephthalate (PBT), and the like, and the conductive component can be selected from at least one of metal, conductive carbon fiber, graphite, conductive carbon nanotube, conductive polymer, and the like. The plastic component can also be 65 wt% to 90 wt% and the conductive component can also be 10 wt% to 35 wt%, based on 100 wt% of the total weight of the conductive composition. In other variations of this embodiment, the conductive composition is a conductive polymer.

The positioning ring 34 is made of metal, is sleeved on the connecting shaft portion 113 of the rotation shaft 11, and is located between the tool holder 33 and the bottom bearing 32 and spaced above the bottom bearing 32. The positioning ring 34 is used to support the tool holder 33, so as to prevent the tool holder 33 from sliding down along the connecting shaft 113.

The base 35 is made of the same material as the tool holder 33, and includes a bottom collar portion 351 coupled to the outer peripheral surface of the bottom bearing 32 by injection molding, three bottom connecting rod portions 352 extending upward and radially outward from the bottom collar portion 351, and a bottom collar portion 353 integrally connected to the top peripheral edge of the bottom connecting rod portions 352 and surrounding the outer grinding tool 22.

The top seat 36 is made of the same material as the tool seat 33, and includes a top collar portion 361 that is injection-molded and coupled to the outer peripheral surface of the top bearing 31, three top connection rod portions 362 that extend downward and radially outward from the top collar portion 361, and a top frame portion 363 that is integrally connected to the bottom peripheral edge of the top connection rod portions 362 and is fitted around the bottom frame portion 353 of the base 35. The top seat 36 and the bottom seat 35 support the rotating shaft unit 1 through the top bearing 31 and the bottom bearing 32, so that the rotating shaft unit 1 is driven to rotate around the axis L without shaking, i.e. the axis is kept stable.

Referring to fig. 2 to 4, the components of the polishing apparatus 10 are produced as follows: firstly, the tool post 33 is formed by injection molding, and the tool post 33 is combined with the inner grinding blade 21 in the cooling molding process, so that the tool post 33 cannot be detached from the inner grinding blade 21 and tightly combined with the inner grinding blade 21, and further is matched with the inner grinding blade 21 to form an inner blade set 41 as shown in fig. 4; then, the top seat 36 is formed by injection molding, and the top seat 36 is tightly combined with the outer peripheral surface of the top bearing 31 and the connecting surface 222 of the outer grinding cutter 22, so as to cooperate with the top bearing 31 and the outer grinding cutter 22 to form an outer cutter set 42 as shown in fig. 4; finally, the base 35 is formed by injection molding, and the base 35 is tightly combined with the outer peripheral surface of the bottom bearing 32 to form a supporting set 43 as shown in fig. 4 in cooperation with the bottom bearing 32.

The polishing apparatus 10 is assembled in the following manner: the inner blade set 41 is tightly fitted over the connecting shaft 113; then, the positioning ring 34 is sleeved on the connecting shaft portion 113; then, the outer blade set 42 is sleeved on the top shaft portion 111, the outer blade set 42 is supported by a spring 13, the support set 43 is sleeved on the bottom shaft portion 112, and the base 35 is clamped between the outer grinding blade 22 and the top base 36; finally, the top sleeve 12 is sleeved on the top shaft 111.

When the grinding device 10 is in use, the driving device drives the rotating shaft unit 1 to rotate the inner grinding blade 21, so that the inner cutting surface 211 rotates relative to the outer cutting surface 221 to grind the object to be ground in the grinding space 24 into powder and fall into a powder storage box 102 below the grinding device 10.

Since the tool post 33, the base 35 and the top seat 36 of the supporting unit 3 are made of conductive composition in this embodiment, in addition to the spindle unit 1 made of metal, and are respectively and tightly combined with the inner grinding blade 21, the bottom bearing 32 and the outer grinding blade 22 made of metal by injection molding, the combination has no gap, so the resistance value is very small. Therefore, the charges generated during the process of grinding the object to be ground into the ground object can be dispersed to improve the problems of flying powder and residual powder derived from charge accumulation.

In the embodiment, since the wire 37 is further provided, the embodiment can further discharge charges to the outside through the base 35, the bottom bearing 32, the tool holder 33, the inner grinding blade 21, the rotation shaft unit 1, the top bearing 31 and the outer grinding blade 22, and sequentially passing through the top seat 36 and the wire 37, thereby more effectively improving the problem of powder flying caused by the charges accumulated in the grinding device 10 and the grinding object, and reducing the adhesion of the grinding object to the grinding device 10 due to the charges.

In summary, the polishing apparatus 10 of the present invention utilizes the design of the supporting unit 3 to disperse the charges generated during the polishing process, thereby improving the problem of powder flying caused by the charges and the adhesion of the polishing article to the polishing apparatus 10, further reducing the residual amount of the polishing article and increasing the powder output, and indeed achieving the object of the present invention.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.

Claims

1. The utility model provides a grinding device, is applicable to and grinds the thing to it grinds to contain pivot unit, wear to overlap in this pivot unit and can be driven by this pivot unit in order to grind the sharpening unit of the thing to be ground, and support unit that supports this pivot unit and this sharpening unit, its characterized in that: the supporting unit is mainly made of conductive compositions and combined with the sharpening unit in an injection molding mode, the sharpening unit and the rotating shaft unit are made of metal, the rotating shaft unit comprises a top shaft part and a bottom shaft part which are opposite to each other, and a connecting shaft part connected between the top shaft part and the bottom shaft part, the sharpening unit comprises an inner sharpening cutter which is sleeved on the connecting shaft part and can be driven to rotate, and an outer sharpening cutter which surrounds the inner sharpening cutter and can be matched with the inner sharpening cutter to grind the object to be ground, the supporting unit comprises a top seat and a base which are made of conductive compositions and sleeved outside the top shaft part and the bottom shaft part and can be matched with and support the rotating shaft unit, and an electric wire which is electrically connected with the top seat, and the top seat is combined with the outer sharpening cutter in an injection molding mode to support the outer sharpening cutter.

2. The abrading apparatus of claim 1, wherein: the supporting unit further comprises a top bearing and a bottom bearing which can conduct electricity and are respectively sleeved on the top shaft part and the bottom shaft part in a penetrating mode, the top bearing is located between the top shaft part and the top base, the bottom bearing is located between the bottom shaft part and the base, the top base is further combined with the top bearing in an injection molding mode, and the base is combined with the bottom bearing in an injection molding mode.

3. The abrading apparatus of claim 1, wherein: the supporting unit also comprises a tool apron which is sleeved on the connecting shaft part and is positioned between the connecting shaft part and the inner grinding cutter, and the tool apron is made of the conductive composition and is combined with the inner grinding cutter in an injection molding way.

4. A grinding apparatus as defined in any one of claims 1 to 3, wherein: the conductive composition comprises a plastic component and a conductive component, wherein the plastic component is selected from at least one of nylon plastics, polypropylene, polycarbonate, polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, high-density polyethylene, polyformaldehyde, polybutylene terephthalate and the group consisting of the materials, and the conductive component is selected from at least one of metal, conductive carbon fiber, graphite, conductive carbon nanotubes, conductive polymers and the group consisting of the materials.

5. The abrading apparatus of claim 4, wherein: the total weight of the conductive composition is 100 wt%, the plastic component is 65 wt% -90 wt%, and the conductive component is 10 wt% -35 wt%.

6. A grinding apparatus as defined in any one of claims 1 to 3, wherein: the conductive composition is a conductive polymer.