Patent Application
20160318029
This application claims priority of Chinese Application No. 201510216098.9, filed on Apr. 30, 2015.
The disclosure relates to a grinding device, and more particularly to a grinding device for grinding beans.
A conventional grinding device as shown in
Therefore, an object of the disclosure is to provide a grinder blade that can alleviate at least one of the drawbacks of the prior art.
According to the disclosure, the grinder blade is adapted to be coupled to and driven rotatably by a rotary shaft. The grinder includes a connecting blade body, a first blade body, and a second blade body. The connecting blade body extends in a horizontal direction and is adapted to be connected to the rotary shaft. The first blade body has a first inclined segment extending obliquely and downwardly from an end of the connecting blade body, a first horizontal segment extending horizontally from the first inclined segment, and a first bent segment extending obliquely and upwardly from the first horizontal segment. The second blade body has a second inclined segment extending obliquely and downwardly from an opposite end of the connecting blade body, a second horizontal segment extending horizontally from the second inclined segment, and a second bent segment extending obliquely and upwardly from the second horizontal segment.
Another object of the disclosure is to provide a grinding device that includes the abovementioned grinder blade.
According to the disclosure, the grinding device includes a container, a rotary shaft, and the abovementioned grinder blade. The container includes a bottom wall and a surrounding wall. The bottom wall has an outer peripheral portion, an inner portion that extends inwardly, upwardly and obliquely from the outer peripheral portion, and a pas sage-defining portion that extends downwardly from an inner edge of the inner portion and that de fines a shaft passage. The surrounding wall extends upwardly from an outer edge of the outer peripheral portion of the bottom wall. The rotary shaft is retained rotatably in the shaft passage. The grinder blade is disposed over the bottom wall of the container.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which:
Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.
Referring to
The container 2 includes a bottom wall 21 having an outer peripheral portion 211, an inner portion 212 that extends inwardly, upwardly and obliquely from the outer peripheral portion 211, and a passage-defining portion 213 that extends downwardly from an inner edge of the inner portion 212 and that defines a shaft passage 214. The container 2 further includes a surrounding wall 22 that extends upwardly from an outer edge of the outer peripheral portion 211 of the bottom wall 21. An angle (Al) defined between the inner portion 212 and the passage-defining portion 213 ranges between 15 and 60 degrees. In this embodiment, the angle (A1) is 50 degrees.
The rotary shaft 31 has a shaft body 311 retained rotatably in the shaft passage 214 and coupled to the grinder blade 4, and a shaft head 312 connected to a top end of the shaft body 311.
The upper and lower bearings 33, 34 are disposed in the shaft passage 214, are spaced apart from each other, and are sleeved on the shaft body 311. The support block 35 is sleeved on the shaft body 311 and is interposed between the upper and lower bearings 33, 34. The sealing ring 36 is sleeved on the shaft body 311 and is disposed between the grinder blade 4 and the upper bearing 33.
In this embodiment, the rotary shaft 31 is driven rotatably by a motor (not shown). The upper and lower bearings 33, 34 can prevent high temperature caused by excessive friction between the rotary shaft 31 and the passage-defining portion 213 when the rotary shaft 31 is rotated. The support block 35 can maintain a certain distance between the upper and lower bearings 33, 34. The sealing ring 36 can prevent ground beans from dropping into the shaft passage 214.
Referring to
The first blade body 6 has a first inclined segment 61 extending obliquely and downwardly from an end of the connecting blade body 5, a first horizontal segment extending horizontally from the first inclined segment 61, and a first bent segment 63 extending obliquely and upwardly from the first horizontal segment 62.
An angle (A2) defined between the connecting blade body 5 and the first inclined segment 61 of the first blade body 61 ranges between 105 and 150 degrees. A distance (D2) between the first inclined segment 61 of the first blade body 6 and the inner portion 212 of the bottom wall 21 ranges between 2 and 6 millimeters. A distance (D3) between the connecting blade body 5 and an extension of the first horizontal segment 62 ranges between 2 and 25 millimeters. A distance (D4) between the first horizontal segment 62 of the first blade body 6 and the outer peripheral portion 211 of the bottom wall 21 ranges between 2 and 6 millimeters. In this embodiment, the angle (A2) is 140 degrees, the distance (D2) is 2.7 millimeters, the distance (D3) is 12.1 millimeters, and the distance (D4) is 2.15 millimeters.
The first blade body further has a first top surface 64, a first bottom surface 65, and a first chamfered surface 66. The first top surface 64 extends from the first inclined segment 61 to the first bent segment 63 through the first horizontal segment 62, and has a first inner edge 641. The first bottom surface 65 is disposed under the first top surface 64, extends from the first inclined segment 61 to the first bent segment 63 through the first horizontal segment 62, and has a first outer edge 651. The first inner edge 641 and the first outer edge 651 are respectively proximate to and distal from the rotary shaft 31. The first chamfered surface 66 is disposed between the first top surface 64 and the first bottom surface 65, and has a first inclined surface portion 661 connected to the first inner edge 641 and a first connecting surface portion 662 interconnecting the first inclined surface portion 661 and the first outer edge 651.
The first outer edge 651 extends in an extending direction which intersects the horizontal direction (T), and an angle (A3) defined between the horizontal direction (T) and the extending direction is larger than 0 degrees and smaller than 10 degrees. With the design of the angle (A3), a length of the first outer edge 651 is increased to facilitate grinding of the beans, and the weight of the first blade body 6 is decreased, thereby preventing the first bent segment 63 from descending and scraping the container 2. An angle (A4) defined between an extension of the first inclined surface portion 661 and an extension of the first bottom surface 65 ranges between 15 and 25 degrees. If the angle (A4) is larger than 25 degrees, the first blade body 6 will not be sharp enough, and if the angle (A4) is smaller than 15 degrees, the first blade body 6 will be difficult to manufacture. The first connecting surface portion 662 has a width (D5) between the first outer edge 651 and the first inclined surface portion 661 which ranges between 0.2 and 0.5 millimeters. If the width (D5) is smaller than 0.2 millimeters, the first blade body 6 will have insufficient structural strength, and if the width (D5) is larger than 0. 5 millimeter, the first blade body 6 will not be sharp enough. In this embodiment, the angle (A3) is 4 degrees, the angle (A4) is 19 degrees, and the width (D5) is 0.3 millimeters.
An angle (A5) defined between the first horizontal segment 62 and the first bent segment 63 ranges between 95 and 120 degrees. A minimum distance (D6) between the first bent segment 63 of the first blade body 6 and the surrounding wall 22 ranges between 1 and 6 millimeters. In this embodiment, the angle (A5) is 110 degrees, and the minimum distance (D6) is 2.2 millimeters. The first inclined segment 61, the first horizontal segment 62, and the first bent segment 63 cooperatively define a first grinding space 67 that opens upwardly.
As shown in
An angle (A6) defined between the connecting blade body 5 and the second inclined segment 71 of the second blade body 7 ranges between 105 and 150 degrees. A distance (D7) between the second inclined segment 71 of the second blade body 7 and the inner portion 212 of the bottom wall 21 ranges between 2 and 6 millimeters. In this embodiment, the angle (A6) is 140 degrees, and the distance (D7) is 2.7 millimeters.
A distance (D8) between the connecting blade body 5 and an extension of the second horizontal segment 72 ranges between 2 and 25 millimeters. A distance (D9) between the second horizontal segment 72 of the second blade body 7 and the outer peripheral portion 211 of the bottom wall 21 ranges between 2 and 6 millimeters. In this embodiment, the distance (D8) is 12.1 millimeters, and the distance (D9) is 2.15 millimeters.
The second blade body 7 further has a second top surface 75, a second bottom surface 74, and a second chamfered surface 76. The second top surface 75 extends from the second inclined segment 71 to the second bent segment 73 through the second horizontal segment 72, and has a second outer edge 751. The second bottom surface 74 is disposed under the second top surface 75, extends from the second inclined segment 71 to the second bent segment 73 through the second horizontal segment 72, and has a second inner edge 741. The second inner edge 741 and the second outer edge 751 are adapted to be respectively proximate to and distal from the rotary shaft 31. The second chamfered surface 76 is disposed between the second top surface 75 and the second bottom surface 74, and has a second inclined surface portion 761 connected to the second inner edge 741, and a second connecting surface portion 762 interconnecting the second inclined surface portion 761 and the second outer edge 751.
The second outer edge 751 extends in an extending direction which intersects the horizontal direction (T), an angle (A7) defined between the horizontal direction (T) and the extending direction is larger than 0 degrees and smaller than 10 degrees. With the design of the angle (A7), a length of the second outer edge 751 is increased to facilitate grinding of the beans, and the weight of the second blade body 7 is decreased to prevent the second bent segment 73 from descending and scraping the container 2. An angle (A8) defined between an extension of the second inclined surface portion 761 and an extension of the second top surface 75 ranges between 15 and 25 degrees. If the angle (A8) is larger than 25 degrees, the second blade body 7 will not be sharp enough, and if the angle (A8) is smaller than 15 degrees, the second blade body 7 will be difficult to manufacture. The second connecting surface portion 762 has a width (D10) between the second outer edge 751 and the second inclined surface portion 761 which ranges between 0.2 and 0.5 millimeters. If the width (D10) is smaller than 0.2 millimeters, the second blade body 7 will have insufficient structural strength, and if the width (D10) is larger than 0.5 millimeter, the second blade body 7 will not be sharp enough. In this embodiment, the angle (A7) is 4 degrees, the angle (A8) is 19 degrees, and the width (D10) is 0.3 millimeters. An angle (A9) defined between the second horizontal segment 72 and the second bent segment 73 ranges between 95 and 120 degrees. A minimum distance (D11) between the second bent segment 73 of the second blade body 7 and the surrounding wall 22 ranges between 1 and 6 millimeters. A maximum distance (D12) in the horizontal direction (T) between the first bent segment 63 and the second bent segment 73 ranges between 50 and 90 millimeters. In this embodiment, the angle (A9) is 110 degrees, the minimum distance (D11) is 2.2 millimeters, and the maximum distance (D12) is 69.8 millimeters. The second inclined segment 71, the second horizontal segment 72, and the second bent segment 73 cooperatively define a second grinding space 77 that opens upwardly.
In operation, by virtue of the configuration of the first blade body 6 and the second blade body 7, the beans on the first inclined segment 61 and the second inclined segment 71 fall onto the first horizontal segment 62 and the second horizontal segment 72, then moved upwardly and outwardly to the first bent segment 63 and the second bent segment 73 by a centrifugal force, and finally fall back to the first horizontal segment 62 and the second horizontal segment 72. In such manner, the beans can remain in the first grinding space 67 and the second grinding space 77 for a relatively long time, and can be well-ground by the first blade body 6 and the second blade body 7.
It should be noted that, if the angle (A5) and the angle (A9) are smaller than 95 degrees, it will be hard for the beans to move upwardly to the first bent segment 63 and the second bent segment 73, and if the angle (A5) and the angle (A9) are larger than 120 degrees, the grinding effectiveness of the first bent segment 63 and the second bent segment 73 may be negatively affected since lengths of the first bent segment 63 and the second inclined segment 73 will have to be shortened to prevent the surrounding wall 22 of the container 2 from being hit by the first bent segment 63 and the second inclined segment 73. In addition, a distance (D13) between atop end of the first bent segment 63 and an extension of the first horizontal segment 62 ranges between 5 and 20 millimeters, and a distance (D14) between a top end of the second bent segment 73 and an extension of the second horizontal segment 72 ranges between 5 and 20 millimeters. In this embodiment, both the distance (D13) and the distance (D14) are 7.7 millimeters.
Referring back to
With the distances (D2, D4, D7, D9) and the minimum distances (D6, D11) specifically designed, the contours of an internal space of the container 2 fit with the shape of the grinder blade 4. In such manner, the beans can be effectively ground instead of accumulating somewhere in the internal space of the container 2, and collision between the grinder blade 4 and the container 2 can be prevented.
As shown in
In conclusion, the W-shaped grinder blade 4 has an enhanced structural strength and can continually stir up the beans for a better grinding effectiveness. Moreover, since the contours of the internal space of the container 2 fit with the shape of the grinder blade 4, the grinding effectiveness is further enhanced and collision between the grinder blade 4 and the container 2 is prevented.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects.
While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201510216098.9 | Apr 2015 | CN | national |
