JPS6045526B2 - electric cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention expands the functionality of an electric cooker known as a food processor so that it can also be used as a mixer.

Conventional food processors have a reduction ratio of 116 to 117.

The main reason for this was to suppress the vibration of the attachments by increasing the starting torque and suppressing the increase in rotational speed. However, as a result, the performance was too low to be practical when cutting mixed liquids, especially when making juices. However, when we conducted detailed experiments on the correlation between cutter rotation speed and cutting performance, we found the results shown in Figure 2.

In other words, the rotation speed of a conventional food processor is 150
From 0 to 2200, there were only about p and m (under load).
In this case, this is a low value that does not pose a problem compared to the cutting performance of conventional mixers, but the number of rotations is further increased to 150.
When p and m are increased from 0 to 2000, almost the same performance as the conventional type can be obtained. In this case, the rotation speed would need to be increased by nearly twice, which would seem to make the motor unrealizable, but if we consider the characteristics of the commutator motor, we can see that it can be achieved without much problem. FIG. 2 shows the NT curve of a standard motor used for food processors with an output of about 100 W and the characteristics when the motor is decelerated. Commutator motor is 20000, p
, m, mechanical loss, windage loss, etc. of the motor increase rapidly, reaching the limit of rotation, but at rotation speeds below this, it has considerable power. If the reduction ratio is around 117 like in a conventional food processor, the rotation speed of the output shaft will be 3000,
To reach p, m, the motor rotation speed must be 2l000, p,
It is difficult to realize this because it requires m. If the cal reduction ratio is about 115, the rotation speed of the motor is 3000, p, m, the motor rotation speed is 15000, p. m) to 4000, p,
20000 to become m, and p and m, which can be fully realized. Slightly reducing the reduction ratio in this way has a significant effect on increasing the speed of the output shaft. Also, if the reduction ratio is reduced, the starting torque decreases, but since the starting torque of the commutator motor I is larger than that of other types of motors due to the characteristics of the commutator motor, the effect is small. In other words, although the starting torque of a food processor that is directly driven by an induction motor is only about 20:9.a, it is still sufficient to function as a food processor. In this case, even if the reduction ratio is set to 1, the starting torque exceeds 40.9.α, which is sufficient for a food processor. This is also one of the reasons why the reduction ratio has traditionally been increased. Regarding high-speed number balance of attachments, increase the balance accuracy of attachments,
There are a number of conventional methods of reducing motor speed using taps or diodes. In this way, by changing the reduction ratio, a food processor with sufficient mixer performance can be realized.
The specific structure of the cooking device of the present invention will be explained with reference to FIG.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a commutator motor, 2 is a small pulley fixed to the shaft of the motor 1, and 4 is a large pulley, which is connected to the small pulley 2 by a belt 3, and reduces the rotation speed of the motor to 114 to 115. are doing. Further, the large pulley 1J4 is connected to a driven shaft 5, and this driven shaft 5 is supported by an oilless bearing 7 supported by an axle stock 6 and an oilless bearing 9 supported by an inserter lower part 8. The driven shaft 5 (↓) holds a reduction gear unit 11 in which a reduction gear is housed via a one-way rotation clutch 10 held in an insert part 8, and at its tip, the reduction gear It is connected to a sun gear (not shown). Reference numeral 12 denotes an output shaft, which is rotatably held by the reducer unit 11 and whose lower end is connected to a planetary gear (not shown) of the reduction gear so that deceleration power can be extracted.

A lower connector 13 is fixed to the upper end of the output shaft 12, and is removably fitted to an upper connector 16 fixed to the lower end of the main shaft 15, which is held through the container 14. There is.

That is, the container 14 is detachable from the main body 17,
In order for the main shaft 15 of the container 14 to obtain power from the main body 17,
This is done by fitting the lower connector 13 and the upper connector 16 together. Reference numeral 18 indicates a cooking attachment such as a knife cutter fitted to the main shaft 15. It is

A lid 19 covers the opening of the container 14 and is rotatably engaged with the upper surface of the container 14.

At this time, the rod 23, which is held perpendicularly to the hand portion 21 of the container 14 and is always biased upward by the spring 22, is pressed downward by the pressing piece 20 provided on the outer periphery of the lid 19.
Furthermore, the rod 23 has a push rod 24 provided on the main body 17 at its lower end.
is pressed to close the contacts of the safety switch 25 and to release the brake by pressing the horizontal operating portion 27 of the brake device 26 pressed against the outer periphery of the reducer unit 11 by the kick spring 26. The push rod 24 is also provided with a spring 28 that biases the contact of the safety switch 25 in the direction of opening, that is, upward. The brake device 26 is pivotally supported 30 on the chassis 29, and is pressed against or released from a brake surface on the outer periphery of the reduction gear unit 11 by rotating the cover 19. The electric cooker of this embodiment has a reduction gear unit 11.
Using the high-speed driving function and low-speed driving function is possible at will,
That is, in the high-speed operation function, when the selector switch is set to high speed, the reduction gear unit fixing device (not shown) is separated from the reduction gear unit 11, and when the power switch is turned on, the motor 1 rotates in the forward direction.

The circuit is transmitted to the driven shaft 5 via a small pulley 2, a belt 3, and a large pulley 4. A reducer unit 11 containing a reduction gear is rotatable, and A direction rotation clutch 10 is interposed between the unit 11 and the driven shaft 5, and since the clutch 10 is in the locking direction when rotated in the forward direction, the reduction gear unit 11 rotates as the driven shaft 5 rotates. output shaft 1 without being decelerated.
2, the signal is transmitted to the lower connector 13, upper connector 16, and main shaft 15. On the other hand, in the low speed operation function, when the changeover switch is set to low speed, the reduction gear unit fixing device comes into contact with the reduction gear unit 11, and when the power switch is turned on, the motor 1 rotates in the reverse direction.

The rotation is transmitted to the driven shaft 5 via the small pulley IJ2, the belt 3, and the large pulley 4, and the reducer unit 1 is in a fixed state by the reducer unit fixing device, and the reducer unit 11 and the driven shaft 5, the one-way rotation clutch 10 is in the releasing direction in reverse rotation.
The rotation of the driven shaft 5 is decelerated via a reduction gear, and the rotation of the output shaft 1
2. Transmitted to the lower connector 13, upper connector 16, and main shaft 15 (decelerated to 1110 or more of the motor rotation speed). At this time, the brake device 26 does not perform a braking function because the reducer unit 11 does not rotate, but the low-speed operation function is used for the whisking blades, powder kneading blades, etc., so there is no danger. As described above, the electric cooker of the present invention uses a commutator motor and has a speed of 1 to 4 to 115, so it can be used not only as a food processor but also as a mixer. It is a mogu that can greatly expand the functions of the cooking device and has high practical value.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a vertical cross-sectional view of an electric cooker showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view showing the cutting performance of the cooker,
FIG. 3 is an NT characteristic diagram of the motor.

Claims (1)

[Claims] 1 Consists of a main body with a built-in motor, a container detachably attached to the main body, a lid of the container, and a cooking attachment such as a knife cutter fitted to a main shaft located inside the container and linked to the motor. , An electric cooking appliance characterized in that the motor uses a commutator motor and is slowed down to 1/4 to 1/5.