TWI586303B - Coffee beans grinding tools - Google Patents

Description

Coffee bean grinding tool

The invention relates to the grinding technology of plant particles, in particular to a grinding tool, which is suitable for the grinding field of coffee beans.

There are quite a lot of people drinking coffee. Some people drink coffee made on the spot. Some people like to buy coffee beans and make rich coffee. No matter which type of coffee, it is a grinding mode, grinding coffee beans into granules, chips or powder of different sizes, adding hot water to brew a cup of hot coffee.

There are quite a number of factors affecting coffee, such as different types of coffee beans, brewing coffee with different tastes. Of course, the size of the particles is related to the aging time, and the rate of instant dissolution is very large. Only the selected coffee bean machine is used, and the excellent grinding tool is used to change the size of the coffee beans to be granulated.

There are quite a few types of grinding tools, such as a propeller type, a flat type (Flat Burrs), a cone type (ConicaI Burrs) or a dent type grinding disc (also known as a ghost tooth cutter disc).

Among them, the parallel grinding tool is shorter than the molar grinding disc, but the coffee beans are ground into pieces, which is not conducive to water extraction. The toothed grinding disc has a long grinding time and is easy to cause the particles to be deteriorated by heat, which affects the taste of the coffee.

Therefore, how to make the grinding tool have the advantages of the parallel and the caries two modes has become an urgent problem to be solved by the present invention.

In view of this, the present invention provides a new grinding tool whose main purpose is to combine the advantages of the parallel and the two-toothed mode, and to grind the machine in a shorter time than the conventional grinding tool. The size of the particles is required to increase the yield of the coffee.

For the above purposes, the grinding tool of the present invention consists of a first cutter head and a second cutter disc, the second cutter disc structure being substantially identical to the first cutter disc.

The first cutter head is a ring having a grinding surface that protrudes a plurality of teeth: the teeth of the innermost ring are defined as flat teeth, and the flat teeth surround the inner ring surface of the first cutter head, adjacent to the second A tooth groove is formed between the flat teeth, each flat tooth has a flat tooth top, and the two sides of the tooth top respectively engage a cutting surface and a tooth back; the teeth of the outermost ring are regarded as caries, and the teeth are close to the first cutter head. The outer annulus forms a valley between adjacent two molars, each of which has an acutely designed tooth tip extending in the circumferential direction.

Wherein, the radius of each cutter disc intersects the cutting surface of the flat teeth to form an angle of 5°-20°.

The crest of the flat tooth is oblique and intersects with a virtual horizontal line parallel to the diameter of the cutterhead to form an included angle of 5° to 25°.

The cutting faces of the flat teeth intersect with the backs of the other flat teeth to form a pitch angle of 45° to 65°.

When the two cutter discs are arranged side by side at a certain distance, the grinding surfaces of the two cutter discs face each other, the teeth of the two grinding surfaces are offset from each other and the flat teeth are opposite in direction, and the grinding operation is performed on the coffee beans passing between the two cutter discs.

In this way, each cutterhead is structurally designed to combine the advantages of the parallel and the two modes of the molars, so that the abrasive cutter can grind the particles of the required size in a short time, and relatively improve the yield of the coffee.

The above-described objects, structures and functions of the present invention will be described with reference to the detailed description of the embodiments.

10‧‧‧Tools

11‧‧‧ outer annulus

12‧‧‧First Cutter

13‧‧‧Combination Department

14‧‧‧second cutterhead

15‧‧‧ Center

16‧‧‧Grinding surface

17‧‧‧ Radius

18‧‧‧ Inner torus

19‧‧‧ horizontal line

20‧‧‧flat teeth

22‧‧‧ cutting surface

24‧‧‧ Back

26‧‧‧ tooth groove

28‧‧‧ tooth top

30‧‧‧ teeth

32‧‧‧ tooth tips

34‧‧‧ tooth valley

40‧‧‧ grinding coffee machine

42‧‧‧Feeder

44‧‧‧Motor shaft

46‧‧‧ front cover

48‧‧‧Adjustment button

θ 1‧‧‧ angle

θ 2‧‧‧ angle

θ 3‧‧‧ tooth angle

Figure 1 is a perspective view of a preferred embodiment of the cutter when combined.

Figure 2 is a perspective view of the tool after it has been separated.

Figure 3 is a plan view of the polished surface of the first cutter head.

Figure 4 is a cross-sectional view of the tool of Figure 1.

Figure 5 is a schematic view of the tool mounted inside the coffee bean mill.

As shown in Figures 1 and 2, the specific construction of the preferred embodiment of the tool 10 is illustrated by a first cutter head 12 and a second cutter head 14 which are capable of grinding coffee beans into granules of the desired size.

The first cutter head 12 is a circular ring, one of its two sides being defined as an abrasive surface 16. In the second and third figures, the abrasive surface 16 protrudes into a plurality of teeth, and is classified into two types, the flat teeth 20 and the molars 30. In the present embodiment, with the center 15 of the first cutter head 12 as the axis, the teeth are surrounded by four concentric circles, one of which is the flat tooth 20 and the other three turns are the molars 30.

The teeth of the innermost ring are defined as flat teeth 20 which surround the inner annulus 18 of the first cutter head 12 and define a toothed groove 26 between adjacent flat teeth 20. Each of the flat teeth 20 has a tooth tip 28 which is flat and has a cutting face 22 and a tooth back 24 on each of its sides.

The cutting face 22 of each flat tooth 20 intersects the radius 17 of the first cutter head 12 to form an angle θ1 which determines the length of the tooth groove 26 to reach the outermost ring of the molars 30. The angle θ 1 is preferably in the range of 5° to 20°.

In Fig. 4, the crests 28 are oblique, intersecting a virtual horizontal line 19 parallel to the diameter of the first or second cutter head 12 or 14, forming an angle ranging from 5° to 25°. θ 2.

In addition, the cutting face 22 of each flat tooth 20 intersects the tooth back 24 of the next flat tooth 20 to form a tooth groove angle θ 3 that determines the shape of the tooth groove 26. The range of the gullet angle θ 3 is preferably 45° to 65°.

Looking back at Figures 2 and 3, it is better that the three turns of the molars 30 are staggered from each other. Taking the outermost teeth 30 as an example, the molars 30 are adjacent to the outer annulus 11 of the first cutter head 12, and a valley 34 is formed between the adjacent second molars 30. Each of the molars 20 has a tooth tip 32 that is designed at an acute angle and along the circumference The direction extends.

The structure or functional shape of the second cutter head 14 is substantially the same as that of the first cutter head 12, and therefore will not be described.

The first and second cutter heads 12, 14 each have a pair of joint portions 13, which are locked into the joint portion 13 by two fasteners (not shown) such as screws, so that the two cutter discs 12, 14 are arranged side by side. As shown in Fig. 4, the polishing faces 16 of the first and second cutter heads 12, 14 face each other with a certain distance therebetween. At this point, the teeth 30 of the two abrasive faces 16 are offset from each other, and the first cutter head 12 is opposite to the flat teeth 20 of the second cutter head 14.

From the 2nd, 4th, and 5th views, the set of cutters 10 are mounted in a grinder of the coffee bean maker 40 in conjunction with a feeder 42. The feeder 42 is connected to a motor shaft 44 at one end and a front cover 46 at the other end, and a scale knob 48 is assembled outside the front cover 46.

When the coffee bean machine 40 is energized, the twist knob 48 is aligned with any scale to adjust the two cutter discs 12, 14, and the distance between the two abrasive surfaces 16 is changed to achieve the particle size selection function. In general, the smaller the scale value, the larger the particle volume, for example, the particles on the 1st scale are larger than the particles on the 4th scale.

Next, the motor shaft 44 rotates the feeder 42 to guide the coffee beans (not shown) into the axial space surrounded by the inner ring surface 18 of the tool 10. Under the action of gravity, the coffee beans usually fall between the flat teeth 20 of the inner ring of the two abrasive faces 16, not crushed by the opposing two-teeth tops 28, or are cut into a number of coffee pieces by the cutting face 22. These pieces are relatively large in volume, and when the outer ring surface 11 is rolled along the tooth groove 26, the teeth 30 which are staggered by the second cutter discs 12, 14 are ground to a smaller extent until the volume is equal to or smaller than the preset value of the particles. The outer surface of the coffee bean machine 40 can be dropped by the outermost teeth 30.

Therefore, the cutter 10 performs the grinding operation on the coffee beans passing between the two cutter discs 12, 14 in the side-by-side state.

11‧‧‧ outer annulus

12‧‧‧First Cutter

13‧‧‧Combination Department

15‧‧‧ Center

16‧‧‧Grinding surface

17‧‧‧ Radius

18‧‧‧ Inner torus

20‧‧‧flat teeth

22‧‧‧ cutting surface

24‧‧‧ Back

26‧‧‧ tooth groove

28‧‧‧ tooth top

30‧‧‧ teeth

32‧‧‧ tooth tips

34‧‧‧ tooth valley

θ 1‧‧‧ angle

Claims (7)

A coffee bean grinding tool comprises: a first cutter head (12), which is a circular ring and has a grinding surface (16), the grinding surface (16) protruding a plurality of teeth: the innermost teeth are defined as flat teeth (20), the flat teeth (20) surround the inner annular surface (18) of the first cutter head (12), and a tooth groove (26) is formed between the adjacent two flat teeth (20), each flat tooth ( 20) having a flat crest (28), the two sides of the crest (28) respectively engaging a cutting surface (22) and a tooth back (24); the outermost teeth are regarded as molars (30), and the molars ( 30) close to the outer annular surface (11) of the first cutter head (12), forming a valley (34) between adjacent two molars (30), each of the molars (20) having an acutely designed tooth tip ( 32), the tooth tip (32) extends in a circumferential direction; a second cutter head (14) having a structure substantially the same as that of the first cutter head (12); when the two cutter discs (12, 14) are spaced apart by a certain distance The grinding surfaces (16) of the two cutter discs (12, 14) face each other, the teeth (30) of the two grinding surfaces (16) are offset from each other and the flat teeth (20) are opposite in direction, and the pair passes through the two cutter discs (12, 14). The coffee beans between them perform the grinding operation. The coffee bean sharpening tool of claim 1, wherein the radius of each of the cutter heads (12, 14) intersects the cutting face (22) of the flat teeth (20) to form an angle (θ 1). The coffee bean grinding tool according to claim 2, wherein the angle (θ 1) is 5° to 20°. The coffee bean sharpening tool of claim 1, wherein the tooth tip (28) of the flat tooth (20) is oblique to a virtual horizontal line parallel to the diameter of the cutter head (12 or 14). (19) intersect to form an angle (θ 2). The coffee bean grinding tool according to claim 4, wherein the angle (θ 2) is 5° to 25°. The coffee bean grinding tool according to claim 1, wherein the cutting face (22) of the flat tooth (20) intersects the back (24) of the other flat tooth (20) to form a tooth groove angle. (θ 3). The coffee bean grinding tool according to claim 6, wherein the groove angle (θ 3) is 45° to 65°.