CPC B01F 35/3204 (2022.01) [B01F 27/808 (2022.01); B01F 35/31 (2022.01); B01F 35/3213 (2022.01); B01F 35/332 (2022.01); B01F 2035/351 (2022.01); B01F 2035/352 (2022.01); B01F 2101/1805 (2022.01)] | 17 Claims |
1. A blender having bi-directionally rotatable blades, the blender comprising:
a container configured to accommodate food;
a blade assembly including a main blade shaft that has an upper portion coupled to a first blade and a lower portion coupled to a first main coupler so as to rotate in a forward direction and a reverse-rotation blade shaft that has an upper portion coupled to a second blade and a lower portion coupled to a first reverse-rotation coupler so as to rotate in a reverse direction and that has a structure which is coaxial with the main blade shaft and through which the main blade shaft passes;
a gearbox assembly including a main gear shaft coupled to a second main coupler, which is engaged with the first main coupler, so as to rotate in the forward direction, a plurality of gears configured to convert the forward rotation of the main gear shaft to reverse rotation, a second reverse-rotation coupler configured to transmit the reverse rotation transmitted through the plurality of gears to the first reverse-rotation coupler, and a gearbox housing configured to surround outer sides of the main gear shaft, the plurality of gears, and the second reverse-rotation coupler; and
a case that has the gearbox assembly provided therein and a case upper plate formed to cover an upper portion of the gearbox assembly, the case upper plate being formed so that the second main coupler and the second reverse-rotation coupler pass therethrough,
wherein the plurality of gears include:
a main gear coupled to the main gear shaft to rotate in the forward direction;
a first sub-gear including a main gear engagement portion, which is engaged with the main gear, and a second sub-gear engagement portion, which is formed to have a diameter different from that of the main gear engagement portion, to rotate in the reverse direction;
a second sub-gear including a first sub-gear engagement portion, which is engaged with the second sub-gear engagement portion, and a reverse-rotation gear engagement portion, which is formed to have a diameter different from that of the first sub-gear engagement portion, to rotate in the forward direction; and
a reverse-rotation gear which is engaged with the reverse-rotation gear engagement portion to transmit the reverse rotation to the second reverse-rotation coupler and which has a structure coaxial with the main gear shaft.
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