Multi-speed food processing device with electrical motor
A food processing device having a motor shaft of a motor from the device coupled to the tool carrying shaft for multi-speed operation. The tool carrying shaft and the motor shaft are connected by two distinct trains, continuously driven, each train comprising one free wheel, mounted with relation to the free wheel of the other train in such a way that power from the motor is only transmitted to the tool carrying shaft by the relevant train in a single direction of rotation of the motor and that for the other direction of rotation of said motor, the power is only transmitted to the tool carrying shaft by the other train.
1. A device for processing food, the device comprising:
an electric motor including a motor shaft, wherein the motor shaft is rotatable in two directions;
a tool carrying shaft adapted to drive at least one cutting tool, the tool carrying shaft being substantially parallel to the motor shaft; and
a coupling assembly adapted to transmit power generated by the electric motor to the tool carrying shaft, the coupling assembly including two distinct coupling sub-devices, each coupling sub-device having at least one wheel mounted to one of either the motor shaft and the tool carrying shaft via a free wheel rotatable without load in a first direction of rotation, and transmitting a torque by friction in a second, opposite direction of rotation,
wherein only one of the coupling sub-devices transmits the power generated by the electric motor to the tool carrying shaft when the motor shaft is rotating in one of the two directions, and the other of the coupling sub-devices transmits the power generated by the electric motor to the tool carrying shaft when the motor shaft is rotating in the other of the two directions, and
wherein the coupling sub-devices have different coupling ratios such that the tool carrying shaft has a different speed of rotation depending on a direction of rotation of the motor shaft.
2. The device according to claim 1 , wherein at least one of the coupling sub-devices comprises toothed wheels for coupling the motor shaft and the tool carrying shaft.
3. The device according to claim 1 , wherein at least one of the coupling sub-devices comprises a belt drive for coupling the motor shaft and the tool carrying shaft.
4. The device according to claim 3 , wherein the belt is an elastic type belt.
5. The device according to claim 1 , wherein one of the coupling sub-devices comprises a loose wheel in the coupling train, thereby allowing the tool carrying shaft to always turn in the same direction independent of a direction of rotation of the motor shaft.
6. The device according to claim 1 wherein the electrical motor is a one-speed asynchronous type motor.
7. The device according to claim 1 , wherein the electrical motor is a dual-speed asynchronous type motor.
8. The device according to claim 1 , wherein the coupling ratio of the two coupling sub-devices has a ratio between them that is roughly in an interval.
9. The device according to claim 1 , wherein a selection of the speed of rotation of the tool carrying shaft is manual.
10. The device according to claim 1 , wherein a selection of the speed of rotation of the tool carrying shaft is automatic.
11. The device according to claim 1 , wherein the free wheels are mounted on the tool carrying shaft.