JPH11290222A - Cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cooking device capable of cooking even under a large load at the time of low-speed rotation in which the rotational frequency of an output shaft can be changed in two steps without drops in motor torque. SOLUTION: An output shaft 15 to rotate a cooking attachment is rotated by the motive power of a motor 4 capable of normal and reverse rotation in which the direction of rotation is switched by a selector switch. A driven pulley (the first input vehicle) 34 rotated by the motive power of the motor 4 is installed to the output shaft 15 via the first one-way clutch 36 so that it can transmit motive power. The fifth transmission gear (the second input vehicle) 38 is installed to the output shaft 15 via the second one-way clutch 39 so that it can transmit motive power. Transmission mechanisms 37 and 40-42 to change the speed of the rotation of the first input vehicle 34 and transfer it to the second input vehicle 38 are arranged over both input vehicles 34 and 38. The output shaft is rotated at a high speed without changing the speed of the rotation of the motor at the time of normal rotation of the motor, and the output shaft is rotated at a low speed by the rotation changed in speed via the transmission mechanisms at the time of the reverse rotation of the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device such as a food processor for cooking foods by rotating a cooking attachment such as a chopping cutter or a filer cutter by the power of a motor, and more particularly to a cooking appliance having two types of cooking attachments. A cooker that can be selectively rotated at a speed.

[0002]

2. Description of the Related Art Many food processors have a constant speed (usually 300 rpm) driven by a motor rotated only in one direction.
The rotation of the chopping cutter at 0 to 4000 rpm is suitable for obtaining the torque necessary to cut meat or the like into small pieces. However, the chopping cutter is suitable for making radish, for example. When used in place of a cutter, the rotation is too fast, and the grated material is scattered, which is unsuitable for such cooking.

[0003] In view of the above, there has been proposed a device in which the rotation of the cutter can be selected between a high speed and a low speed. This is a use mode in which a motor is 100% energized without passing through a half-wave rectifier incorporated in a drive circuit of a motor rotated only in one direction, and a half-wave input voltage to the motor is passed through the half-wave rectifier. The use mode of rectifying and supplying 50% current is selected by a changeover switch.

[0004]

As described above, in the prior art in which the rotation speed of the cooking attachment is changed by changing the rotation speed of the motor, if the low-speed rotation is selected, the torque of the motor decreases accordingly. However, when a large load is applied to the cooking attachment, the rotation tends to stop. In addition, as described above, in the related art that involves a decrease in the motor torque, the lower the rotation of the cooking attachment is, the more the rotation tends to stop due to the load. It has not been possible to obtain a configuration that enables low-speed rotation at a low level.

On the other hand, the present inventor has developed a cooking attachment for kneading powder which is suitable for kneading flour for the purpose of increasing the versatility of a food processor.
It was experimentally confirmed that satisfactory powder kneading can be achieved by rotating at a low speed of about m. However, it has been found that when this attachment is used in a food processor capable of switching the speed, the rotation is abnormally high and is not suitable for use.

[0006] The first problem to be solved by the present invention is:
An object of the present invention is to provide a cooker that can change the rotation speed of an output shaft to two levels of high and low without lowering the motor torque and can cook even a large load during low-speed rotation.

A second problem to be solved by the present invention is that
In order to solve the first problem, it is an object of the present invention to provide a cooker that can perform two types of cooking using the same cooking attachment.

[0008] A third problem to be solved by the present invention is as follows.
In order to solve the first problem, it is an object of the present invention to provide a cooker capable of easily selecting a rotation speed of an output shaft.

[0009]

According to a first aspect of the present invention, there is provided a motor capable of rotating forward and reverse, switching means for switching the rotation direction of the motor,
A rotatable output shaft that rotates the cooking attachment,
A first input vehicle which is mounted on the output shaft so as to be capable of transmitting power via a first one-way clutch and is rotated by the power of the motor, and is mounted on the output shaft such that power can be transmitted via a second one-way clutch. A second input vehicle; and a speed change mechanism provided across the first and second input vehicles and transmitting the rotation of the first input vehicle to the second input vehicle.

According to the first aspect of the present invention, when the switching means switches the motor to, for example, forward rotation, the first one-way clutch to which the forward rotating power is applied via the first input vehicle is the first one-way clutch. Since the input wheel is connected to the output shaft, the output shaft rotates together with the first input wheel rotated by the forward rotation of the motor. On the other hand, the rotation of the first input vehicle is changed by the transmission mechanism and transmitted to the second input vehicle to rotate the input vehicle. At this time, the second one-way clutch causes the second input vehicle and the output shaft to rotate. Since the connection is released, the second input vehicle idles with respect to the output shaft. Therefore, the output shaft is rotated by the forward rotating power of the motor to rotate the cooking attachment. Conversely, when the rotation direction of the motor is switched by the switching means, the reverse power causes the first input vehicle to reverse, but the rotation at this time releases the connection of the first one-way clutch to the output shaft. Therefore, the first input vehicle idles with respect to the output shaft. At this time, the rotation of the idling first input vehicle is shifted by the speed change mechanism to rotate the second input vehicle in a direction opposite to that in the forward rotation of the motor, so that the second one-way clutch is connected to the output shaft and the second input shaft. Connect the shaft. Therefore, the output shaft is rotated by the reverse power of the motor shifted by the transmission mechanism.

As described above, according to the first aspect of the present invention, the rotation of the motor can be changed by the speed change mechanism and output by switching the rotation direction of the motor that can be rotated forward and backward by the switching means without controlling the input to the motor. It can be applied to the shaft or the output shaft without changing the rotation of the motor, and the cooking attachment can be rotated at either high speed or low speed together with the output shaft to perform cooking. There is no reduction in motor torque.

In order to solve the second problem, a second aspect of the present invention is directed to a rotation provided to the output shaft from the first input vehicle via the first one-way clutch. A direction is the same as a rotation direction given to the output shaft from the second input vehicle via the second one-way clutch.

Since the invention of claim 2 is dependent on the invention of claim 1, in addition to the operation of the invention of claim 1, the rotation direction is the same regardless of the rotation speed of the output shaft. When the cooking attachment rotated with the output shaft has a cooking blade, it is possible to cook at two different cooking speeds using the blade.

In carrying out the invention of claim 2,
As means for enabling the output shaft to rotate in the same direction at both high speed and low speed, the first and second input wheels are rotated in opposite directions, and The first and second one-way clutches may be connected in the same rotational direction to the output shaft.

In order to solve the third problem, a fourth aspect of the present invention is characterized in that the switching means is an electric switch.

Since the invention of claim 4 is dependent on the invention of claim 1, in addition to the operation of the invention of claim 1, the motor can be rotated forward or reverse, in other words, the rotation of the output shaft can be increased. The selection operation such as a low speed can be switched by a simple operation of the electric switch.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a synthetic resin main body case provided in the food processor, which is assembled from a body case, a bottom case, and a top cover. Inside the main body case 1, a metal support plate 2 is arranged in a horizontal posture. A motor 4 that is rotatable in the forward and reverse directions, which is covered from above by the top cover, is provided at a position separated from the base 1 a of the main body case 1. It is attached to the support plate 2 with it interposed therebetween.

FIG. 7 shows a drive circuit of the motor 4. In FIG. 7, 5 is an AC power supply, 6 is a power switch, 4
a and 4b are field coils of the motor 4, and 7 and 8 are changeover switches. The changeover switch 7 is connected to the field coil 4a.
, A first switching terminal 7b for high-speed cooking, and a second switching terminal 7c for low-speed cooking. Similarly, the switching switch 8 is also connected to the common coil connected to the field coil 4b. It has a terminal 8a, a first switching terminal 8b for high-speed cooking, and a second switching terminal 8c for low-speed cooking. The two changeover switches 7 and 8 are interlocking switches that interlock with each other, and have a common terminal 7 of the changeover switch 7.
a is connected to the first switch terminal 7b, the common terminal 8a of the switch 8 is connected to the first switch terminal 8b, and similarly, the common terminal 7a of the switch 7
Is connected to the second switching terminal 7c, the common terminal 8a of the changeover switch 8 is connected to the second switching terminal 8c. The operation unit of the interlocking switch has a first operator for specifying high-speed cooking and a second operator for specifying low-speed cooking, and is provided on an operation panel (not shown) provided on the outer surface of the main body case 1. ing.

When high-speed cooking is selected by operating the first operator on this operation panel, the common terminal 7a of the changeover switch 7 and the first changeover terminal 7b are connected as shown by the solid line in FIG. At the same time, the common terminal 8a of the changeover switch 8 and the first changeover terminal 8b are connected to rotate the motor 4 in one direction (forward rotation). When the second operator is operated to select low-speed cooking, the common terminal 7a of the changeover switch 7 and the second changeover terminal 7c are connected, and the common terminal 8a of the changeover switch 8 is connected to the second terminal 7a. The second switching terminal 8c is connected to rotate the motor 4 in the other direction (reverse rotation). The rotation speed of the motor 4 during the forward rotation or the reverse rotation is the same, and the motor 4 is rotated at a speed of 210,000 rpm so as to be suitable for high-speed cooking using, for example, a chopping cutter (not shown) as a cooking attachment.

An upper bearing 12 is mounted on the support plate 2 via a bearing retainer 11 connected thereto. A bearing support plate 13 is connected to a lower surface of the bearing retainer 11, and a lower bearing 14 corresponding to the upper bearing 12 is attached to the support plate 13. An output shaft 15 is supported by the upper and lower bearings 12 and 14 so as to be rotatable in a vertical posture. The upper end of the output shaft 15 protrudes into the center of the recess 1b of the upper surface opening of the base 1a, and a coupling 16 is attached to the upper end.

On the base 1a, a cooking container 17 made of, for example, transparent glass having an open upper end is mounted by detachably fitting a container base 18 connected to the lower surface of the cooking container 17 into the recess 1b. . A rotating shaft 19 is provided at the center of the bottom wall of the cooking vessel 17.
Is mounted in a vertical position, and a lower end of a rotating shaft 19 protruding from the center of the container base 18 is provided with a cooking vessel 17 for the base 1a.
A coupling 20 is detachably engaged with the coupling 16 with the attachment and detachment. A cooking attachment that rotates with the rotating shaft 19 is detachably attached to the rotating shaft 19. As the cooking attachment, a chopping cutter (not shown) or a cooking attachment 21 for milling shown in FIG. 1 can be selectively replaced in the cooking container 17 for use. Accordingly, the rotation shaft 19 and the cooking attachment 21 attached thereto are driven to rotate in the cooking container 17 by the output shaft 15.

In FIG. 1, reference numeral 22 denotes a bearing support which penetrates the bottom wall of the cooking container 17 and has a lower end to which a container base 18 is screwed. In FIG. 1, reference numeral 24 denotes a waterproof packing. Reference numeral 25 denotes a lid which is detachably fitted to the upper end opening of the cooking container 17, and while the whole of the cooking container 17 is being pushed downward through the lid 25 in a closed state, as is conventionally known, the lid 25 is closed. The power switch 6 is closed in conjunction therewith.

The downward motor shaft 31 of the motor 4 penetrating the support plate 3 downward and the output shaft 15 are connected to the transmission means 3.
2 are connected. The transmission means 32 is formed by a drive pulley 33 fixed to the motor shaft 31, a driven pulley 34 attached to the output shaft 15 as described later, and a belt 35 wound around the pulleys 33 and 34. ing.

The driven pulley 3 having a larger diameter than the driving pulley 33
Numeral 4 is used as a first input vehicle for the output shaft 15, and includes a lower outer peripheral surface of the output shaft 15 and the driven pulley 3.
4 is attached to the output shaft 15 via a first one-way clutch 36 interposed between the output shaft 15 and the inner peripheral surface of the output shaft 15. The clutch 36 engages, for example, so as to connect the output shaft 15 and the driven pulley 34 when the driven pulley 34 rotates clockwise, and releases the connection when the driven pulley 34 rotates counterclockwise, for example. The driven pulley 34 is provided in a direction in which the driven pulley 34 idles.
The driven pulley 34 is provided with a first
The transmission gear 37 is provided.

On the output shaft 15, a fifth transmission gear 38 serving as a second input wheel, which is located above the driven pulley 34, is connected between an upper outer peripheral surface of the output shaft 15 and an inner peripheral surface of the fifth transmission gear 38. It is attached to the output shaft 15 via a second one-way clutch 39 interposed therebetween so that power can be transmitted. The clutch 39 is engaged, for example, so as to connect the output shaft 15 and the fifth transmission gear 38 when, for example, the fifth transmission gear 38 rotates clockwise, and conversely, when the fifth transmission gear 38 rotates counterclockwise, the coupling is performed. And the fifth speed change gear 38 is provided in a direction in which the fifth speed change gear 38 idles with respect to the output shaft 15.

As shown in FIGS. 2 to 4, the fifth transmission gear 39 is connected to the first transmission gear 37 via second to fourth transmission gears 40 to 42. The first to fifth transmission gear trains interlocking with each other constitute, for example, a transmission mechanism for reducing the speed. That is, the third transmission gear 41 having a smaller diameter is integrally formed on the upper surface of the central portion of the second transmission gear 40 having a larger diameter than the first transmission gear 37.
41 is rotatably supported by the first gear shaft 43. The first gear shaft 43 protrudes downward from a shaft holder 45 mounted on the upper surface of the support plate 2. This gear shaft 4
The second transmission gear 40 supported by 3 is meshed with the first transmission gear 37, and the similarly supported third transmission gear 41 is disposed above the support plate 2. The fourth transmission gear 42 having a diameter larger than that of the third transmission gear 41 is rotatably supported by a second gear shaft 44 projecting downward from a shaft holder 45 and meshed with the third transmission gear 41. . The fourth speed change gear 42 has a diameter larger than that of the fifth speed change gear 3.
8 is engaged.

In the power transmission system extending from the motor 4 to the output shaft 15 as described above, for example, the rotation speed of the motor 4 is 2
1000 rpm, the diameter of the driving pulley 33 is 18 mm, the diameter of the driven pulley 34 is 105 mm, the diameter of the pitch circle of the first transmission gear 37 is 26 mm, the diameter of the pitch circle of the second transmission gear 40 is 116 mm, and the diameter of the third transmission gear 41 is The diameter of the pitch circle is 26 mm, the diameter of the pitch circle of the fourth transmission gear 42 is 40 mm, and the diameter of the pitch circle of the fifth transmission gear 38 is 104
mm.

Next, the operation of the food processor having the above configuration will be described. First, when a chopping cutter (not shown) is attached to the rotating shaft 19 in place of the cooking attachment 21 for milling shown in FIG.
A high-speed cooking is designated by operating a first operation element of an operation panel (not shown), and meat to be cooked or the like is put in the cooking container 17, and a lid 25 is put on the cooking container 17, and the lid 25 is placed downward. The power switch 6 may be closed by pressing and holding.

Then, as indicated by solid arrows in FIG. 7, a current flows through the motor 4, and as the motor 4 is operated and the motor shaft 31 rotates clockwise, the driving pulley 33 interlocked with the rotation. , Driven pulley 34, and first
The fifth to fifth transmission gears 37, 39 to 42, and 38 rotate as indicated by arrows in FIG. At this time, depending on the diameter difference between the pulleys 33 and 34, the driven pulley 34
Since the clockwise rotation is performed at 00 rpm, the first one-way clutch 36 connects the driven pulley 34 and the output shaft 15. However, since the fifth speed change gear 38 rotates counterclockwise, the second one-way clutch 39 releases the connection between the fifth speed change gear 38 and the output shaft 15, and the fifth speed change gear 38 rotates counterclockwise with respect to the output shaft 15. Idle.

As described above, when the output shaft 15 is set at 3600 rpm
m, the high-speed rotation together with the driven pulley 34, the coupling 16 meshed with the output shaft 15,
By rotating the chopping cutter attached to the rotating shaft 19 at high speed together with the rotating shaft 19 via 20, food such as meat in the cooking container 17 can be cut into small pieces and cooked by the cutter.

When the cooking attachment 21 for milling is mounted on the rotary shaft 19 as shown in FIG. 1, the low-speed cooking is performed by operating the second operating element of the operation panel (not shown). In addition to the designation, the powder and water to be cooked are put into the cooking vessel 17 and the lid 25 is put on the cooking vessel 1.
7, the power switch 6 may be closed by pressing and holding the lid 25 downward.

Then, contrary to the high-speed operation, a current flows through the motor 4 as shown by a dotted arrow in FIG. 7, and the motor shaft 31 of the motor 4 rotates to the left. According to this rotation, the driving pulley 33, the driven pulley 34, and the first to fifth transmission gears 37, 39 to 42, 38
Rotate as shown by the arrows. At this time, the driven pulley 34 rotates counterclockwise at 3600 rpm according to the diameter difference between the two pulleys 33 and 34, so that the first one-way clutch 36 releases the connection between the driven pulley 34 and the output shaft 15, and the driven pulley 34 It rotates counterclockwise with respect to the output shaft 15. On the other hand, since the fifth speed change gear 38 rotates clockwise, the second one-way clutch 39 is connected to the fifth speed change gear 3.
8 and the output shaft 15 are connected.

By the way, power transmission from the driven pulley 34 to the fifth transmission gear 38 is performed by first to fourth transmission gear trains, which reduce the rotation. In this case, the first
The rotation of the driven pulley 34, which rotates at a high speed of 3600 rpm, is reduced to a low speed of 200 rpm according to the diameter difference of each pitch circle of the fifth speed change gears 37, 39 to 42, 38.

As described above, the output shaft 15 is set at 200 rpm.
At low speed together with the fifth speed change gear 38,
In this case, the output shaft 15 is rotated clockwise similarly to the case where the chopping cutter is rotated. for that reason,
A coupling 16 meshed with the output shaft 15;
The milling cooking attachment 21 attached to the rotating shaft 19 and the rotating shaft 19 interlocked via 20 can be rotated at a low speed to perform the milling cooking in the cooking container 17.

As described above, the cooking attachment 2 at low speed
1 is rotated, so that the powder is not scattered because the rotation is too fast, and a predetermined powder kneading can be realized. In this case, since the motor 4 is still rotating at a high speed of 21,000 rpm as in the case of cooking using a chopping cutter, the torque does not decrease. Therefore, despite the fact that the rotation speed given to the output shaft 15 is reduced to about 1/20 as compared with the case where the rotation speed is high, the cooking attachment 2 has a resistance that increases as the powder is kneaded.
Predetermined milling can be performed without stopping cooking due to the stop of 1 and without overloading the motor 4.

In the food processor according to the first embodiment, as described above, the direction of applying the current to the motor 4 is switched by the electric changeover switches 7 and 8 by operating the operation element on the operation section. Since the rotation speed of the output shaft 15 is switched by rotating the motor 4 forward or backward, there is no trouble of inserting and removing an intermediate gear for switching the rotation direction into the transmission gear train.
The desired rotation can be obtained by the simple operation of 8 and the convenience is good.

Further, since the speed is changed using the speed change mechanism without controlling the input to the motor 4 as described above, the speed can be changed according to the gear ratio of the speed change mechanism. Therefore, the output shaft 1 can be reduced without reducing the motor torque by selecting the gear ratio.
5, two rotation speeds can be arbitrarily determined.

Since there is a high degree of freedom in setting the gear shifting, it is possible to reduce the difference between the high speed and the low speed, if necessary, unlike the first embodiment. In the case of performing with such a setting, when the rotation direction of the output shaft 15 is the same, when performing grated cooking using, for example, a grated cooking attachment rotated with the output shaft, 2
You can cook on the street. That is, the attachment has a down-grinding blade (cooking blade) oriented in a fixed direction, and the blade is attached to the rotating shaft 19 in a cooking-friendly direction. By selecting and rotating either the high speed or the low speed of the output shaft 15 by the switching operation of 8, it is possible to perform two types of grated cooking according to the selected rotation of the grated cooking attachment. is there.

The present invention is not limited to the first embodiment. The difference between the high speed and the low speed can be arbitrarily set by selecting the gear ratio of the gear train of the transmission mechanism, and the speed can be reduced. The speed is not limited to this, and the speed may be increased by changing the combination of the gear trains. Further, a gear train may be used as the transmission means.

[0041]

The present invention is embodied in the form described above and has the following effects.

According to the first aspect of the present invention, the rotation of the motor is shifted by the speed change mechanism or the output shaft is rotated without shifting without the input control to the motor capable of rotating forward and reverse. Cooking can be performed, so that the rotation speed of the output shaft can be changed to two levels of high and low without lowering the motor torque, and the speed ratio of the transmission mechanism is increased to rotate the output shaft at low speed to perform cooking. At this time, even if a large load acts on the output shaft, the operation is not stopped and cooking can be performed even with the large load.

According to the second aspect of the present invention and the third aspect of the present invention,
In addition to the effect of the first aspect of the invention, since the cooking attachment rotated together with the output shaft is rotated at high speed or low speed, cooking can be performed at two different cooking speeds.

According to the fourth aspect of the invention dependent on the first aspect of the invention, in addition to the effect of the first aspect of the invention, it is possible to easily select the rotation speed of the output shaft to be high or low. be able to.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of an entire food processor according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a main part of a power transmission system for an output shaft of the food processor shown in FIG. 1;

FIG. 3A is a top view showing the configuration of the power transmission system shown in FIG. 2; (B) is a bottom view which shows the structure of the power transmission system shown in FIG.

FIG. 4 is an exploded sectional view showing a configuration of the power transmission system shown in FIG. 2;

FIG. 5 is a diagram showing a rotation direction of each rotating component of the power transmission system shown in FIG. 2 in a state where the motor is normally rotated.

FIG. 6 is a view showing the rotation direction of each rotating component of the power transmission system shown in FIG. 2 in a state where the motor is reversed.

FIG. 7 is an electric circuit diagram showing a motor drive circuit provided in the food processor according to the first embodiment.

[Explanation of symbols]

 4 motor, 7, 8 changeover switch (switching means), 15 output shaft, 21 cooking attachment, 31 motor shaft, 32 transmission means, 33 drive pulley, 34 driven pulley (first input vehicle) 35, a belt, 36, a first one-way clutch, 37, a first transmission gear (transmission mechanism), 38, a fifth transmission gear (second input wheel), 39, a second one-way clutch, 40, a second transmission gear ( Transmission mechanism), 41: third transmission gear (transmission mechanism), 42: fourth transmission gear (transmission mechanism).

Claims (4)

[Claims] 1. A motor capable of rotating forward and reverse, a switching means for switching the rotating direction of the motor, a rotatable output shaft for rotating a cooking attachment, and a power transmission to the output shaft via a first one-way clutch. A first input vehicle mounted on the output shaft and rotated by the power of the motor; a second input vehicle mounted on the output shaft so as to be capable of transmitting power via a second one-way clutch; and the first and second inputs. A speed change mechanism provided across the vehicle to transmit the rotation of the first input vehicle to the second input vehicle. 2. A rotation direction applied from said first input vehicle to said output shaft via said first one-way clutch, and a rotation direction applied from said second input vehicle to said output shaft via said second one-way clutch. The cooker according to claim 1, wherein the directions are the same. 3. The rotation direction of the first and second input wheels is reversed, and the rotation direction of the first and second one-way clutches connected to the output shaft is the same. The cooker according to claim 2, wherein 4. The cooking device according to claim 1, wherein said switching means is an electric switch.