JPS6364665B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention seeks to provide a power device for a cooker in which functions such as bread kneading, whisking, cutting, and grinding, which were previously independent functions, are performed in one device. be.

Conventionally, the number of revolutions of the blade for bread kneading and whisking was 300.
〜400r.pm, which requires relatively large torque, and food processors require 1500r.pm〜2000r.p.
m, which also required torque. For this reason, induction motors were used for bread kneading and whipping, and commutator motors were used for food processors, and each motor was used to suit its characteristics. For this reason, it has been difficult to obtain a single motor that satisfies these functions.

The present invention attempts to obtain these different speed-torque characteristics using one motor,
By combining a belt and pulley speed reducer and a planetary gear speed reducer, a two-stage speed reduction ratio can be obtained.

Also, in such a case, the problem arises when actually using the food processor, if it is used at high speed when it should be used at low speed, for example, when a heavy load such as bread kneading is performed at high speed using a food processor. If this is done, it is extremely dangerous and the equipment itself may be damaged.

The present invention aims to provide a power device for a cooker that can change the reduction ratio while ensuring safety so that such a problem does not occur.

When a commutator motor is used as a motor to realize the above functions, a combination of reduction ratios of approximately 1/4 to 1/7 and 1/20 to 1/50 is required. Therefore, the present invention uses a pulley and a belt as the first stage deceleration method.
Reduce the speed to 4 to 1/7, and use the second stage planetary gear to reduce speed to 1/5.
The reduction ratio has been reduced to ~1/7, resulting in a total reduction ratio of 1/20 to 1/50 for the first and second stages. Furthermore, by fixing the planetary gear so that it does not function as a speed reducer, it is possible to obtain the speed of only the first stage.

An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figure 1, 1 is a motor;
2 is a small pulley fixed to the motor shaft, 3 is a belt, 4 is a large pulley, 5 is a driven shaft fixed to the large pulley 4, 6 is a one-way clutch device, 7 is a planetary gear fitted with the driven shaft 5 A sun gear 8 is a gear case housing a planetary gear reducer, and an outer gear 8' of the planetary gear reducer is fixed to this gear case 8, and a one-way clutch device 6 is connected to the gear case 8 via an insert portion 9. Both are fixed. 10 is an output shaft of the planetary gear, 11 is a lower connector fixed to the output shaft 10, 12 is an upper connector that fits into the lower connector 11, and 13 is a main shaft fixed to the upper connector 12. 14 is an oil seal, and 15 is a bearing for the main shaft 13. Further, 16 is a bearing of the driven shaft 5, 17 is a bearing mounting base, 18 is a chassis, 19 is a main body, 20 is a back plate, 21 is a container to which the main shaft 13 is attached, and 22 is a container lid that covers the opening of the container 21. be.

In FIG. 2, 23 is a rotational direction changeover switch, and by operating this switch 23, the rotational direction of the motor 1 is changed over. 24 is a cam interlocked with the rotation direction switch 23; 25;
is a brake arm, and 26 is a brake spring.
The cam 24 is rotated by operating the rotation direction changeover switch 23. Since the brake arm 25 is pressed against the cam 24 by the brake spring 26, the movement of the cam 24 causes the brake arm 25 to be pressed against the gear case 8 via the brake pad 27 and to be moved away from the gear case 8. Now, the rotation direction of motor 1 is
When the one-way clutch device 6 is released in the same direction, the rotational direction changeover switch 23 and the brake arm 25 are positioned to lock the gear case 8. At this time, the power transmitted from the motor 1 is transmitted to the sun gear 7, which is a planetary gear, via pulleys 2 and 4. The output from the planetary gear is output shaft 1
0 to the main shaft 13. In this case, the ratio between the rotational speed of the motor 1 and the rotational speed of the main shaft 13, that is, the reduction ratio, is the product of the reduction ratio of the pulleys 2 and 4 and the reduction ratio of the planetary gear. The former is 1/5, the latter is 1/
If it is 7, the ratio will be 1/35. Further, when the rotational direction of the motor 1 is the same as the locking direction of the one-way clutch device 6, the rotational direction changeover switch 23 and the brake arm 25 are in a position to release the gear case 8. The rotation of the motor 1 is transmitted to the driven shaft 5 via the pulleys 2 and 4, but a one-way clutch device 6
The force latched to is transmitted to the gear case 8 via the insert portion 9. Since the gear case 8 is integrated with the outer gear 8' of the planetary gear, in this state it is also fixed to the sun gear 7 fitted with the driven shaft 5, and two of the three elements of the planetary gear are fixed. Since this means that the output shaft 10, which is another element, is also fixed, the output shaft 10 and the driven shaft 5 rotate as one. Therefore, the reduction ratio between the main shaft 13 and the motor 1 is equal to the reduction ratio of the pulley, which is 1/5.
becomes.

In this way, the rotation direction of the motor 1 is changed by the rotation direction changeover switch 23, and the gear case 8 is simultaneously released and locked by the cam 24 linked to this switch 23, thereby changing the reduction ratio. be able to. Also, since the direction of rotation of this cooker changes when the reduction ratio changes, the fitting part of the blades to be installed can be designed to prevent danger from accidentally moving at high speed with the low speed blades. can.

Further, reference numeral 28 denotes a push plate that performs a swinging motion as the rotation direction changeover switch 23 rotates, and 29 is a power switch. As a result, the switch button is unlocked. By doing so, it is possible to prevent the motor 1 from suddenly reversing when the rotation direction is changed.

In Fig. 3, 30 is the rotation direction changeover switch 2.
3 is a crown gear using a sheet metal linked to the shaft, and 31 is the other corresponding gear. Further, 32 is a boss for attaching the attachment portion of the cam 24 to the main body 19. By adopting such a structure, the mounting portions of the cam 24 and the brake arm 25 can be separated. In this way, the rotation direction changeover switch 23, which requires precise installation, can be protected from the heavy chassis 18, on which the motor 1, gears, etc. are attached, shaking due to external forces such as shocks during transportation. .

As described above, the power device of the cooking device of the present invention includes a motor, a driven shaft that transmits the power of the motor via a belt and a pulley, and an output that transmits the power from the driven shaft via a planetary gear reducer. a shaft, the driven shaft is connected to the sun gear of the planetary gear, and a one-way clutch device is provided between the driven shaft or the output shaft and a gear case to which the outer gear of the planetary gear reducer is fixed; By changing the rotational direction of the motor with the rotational direction changeover switch, the driven shaft and gear case are connected or disconnected by the action of the one-way clutch, and the action of the cam interlocked with the rotational direction changeover switch is controlled. It has a mechanism that fixes or frees the outer gear of the planetary gear reducer by bringing the brake arm operated by the gear case into contact with and separating from the gear case. When the outer gear of the gear reducer is set free and the one-way rotational clutch device is released, the outer gear is fixed. According to this configuration, the motor can be changed by operating the rotational direction changeover switch. When the rotation direction of the planetary gear reducer is changed, a mechanism consisting of a cam and a brake arm that work in conjunction with this rotation direction changeover switch locks and releases the gear case that locks the outer gear of the planetary gear reducer, thereby changing the reduction ratio. Because of this, when switching the rotation direction, it is possible to obtain different rotation speeds with high reliability.This also allows one device to perform multiple cooking functions, and its configuration is extremely simple. Therefore, it can be obtained at low cost.

Furthermore, since the rotation direction changes when the reduction ratio changes, the present invention is designed to improve the fitting part of the blades attached to the output shaft so that there is no danger even if the low-speed blades are accidentally moved at high speeds. can do.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the device of the present invention;
2 is a plan view of the main part of FIG. 1, and FIG. 3 is a sectional view of the main part. 1...Motor, 6...One-way clutch device,
7... Sun gear, 8... Gear case, 8'... Outer gear, 10... Output shaft, 21... Container, 22...
... Container lid, 23 ... Rotation direction switch, 25
...brake arm.

Claims (1)

[Claims] 1 has a motor, a driven shaft that transmits the power of the motor via a belt and a pulley, and an output shaft that transmits power from the driven shaft via a planetary gear reducer, and the driven shaft is a planetary gear reducer. A one-way clutch device is provided between the gear case connected to the sun gear and to which the driven shaft or output shaft and the outer gear of the planetary gear reducer are fixed, and the rotation direction of the motor is changed by a rotation direction changeover switch. The driven shaft and the gear case are connected and disconnected by the action of the one-way clutch, and
It has a mechanism that fixes or frees the outer gear of the planetary gear reducer by bringing a brake arm, which is operated by the action of a cam interlocking with the rotation direction changeover switch, into contact with and away from the gear case. A power device for a cooking appliance, characterized in that when a one-way clutch device is locked, the outer gear of the planetary gear reducer is free, and when the one-way clutch device is released in the rotating direction, the outer gear is fixed.