JPH02237444A - Geared motor - Google Patents

Abstract

PURPOSE:To lower the price of product by attracting/releasing an operating chip according to whether flux produced from a motor coil exists or not thereby operating a clutch and eliminating electromagnet. CONSTITUTION:Upon power supply to the coil 10 of a motor B, flux is produced therefrom and a rotor 7 is rotated. Furthermore, an operating chip 33 is attracted to a core 31 magnetized through the rotor shaft 13 and the section 28 of a clutch E to be operated is pushed by the operating chip 33 thus bringing about ON state. Consequently, rotation of the rotor 7 is transmitted through the clutch E, an output mechanism F and a row of tooth ring D to an output gear 18 thus rotating an output shaft 17 and an output lever 19 in the direction of an arrow. The rotation is employed for driving of load. Upon interruption of power, flux extincts to stop rotation of the rotor 7 while simultaneously magnetization of the core 31 stops to release the operating chip 33 so as to disengage the clutch E. Consequently, the output mechanism F is brought into free state. Since the clutch can be operated without requiring an electromagnet, the price of product can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a geared motor that can be used to drive various mechanical devices.

[Conventional technology]

This type of geared motor has a clutch interposed in the middle of the gear train that connects the motor and the output member for driving the load, and when the load is not being driven, the clutch can be disengaged to allow free movement of the load. I am trying to make it so that The operation of the krasochi is carried out using an electromagnetic stone.

(Problems to be Solved by the Invention) This conventional configuration has a problem in that the price of the geared motor increases because the electromagnet is expensive.

The present invention was made in view of the above points, and its purpose is to utilize the presence or absence of magnetic flux emitted from the coil of a motor that is essential for driving a load. It is an object of the present invention to provide a one-gear motor having a structure in which the clutch can be operated by the driver and the product price can be reduced.

[Means for solving yA problem]

In order to achieve the above object, the present invention takes the measures as described in the claims above, and its effects are as follows.

[Effect]

When an electric current is applied to the coils of a motor, the magnetic flux generated therefrom causes the rotor to rotate. Further, the operating piece is attracted to the magnetic core by the magnetic flux, and the clutch becomes human-like. The rotation of the rotor is then transmitted to the output member through the clutch, causing it to rotate.

On the other hand, when the energization is cut off, the magnetic flux disappears, so the rotor stops, the operating piece is released, and the clutch is disengaged. The output member is then in a free state.

(Example〕 The drawings showing the embodiments of the present application will be described below.

In Figures 1 and 2, the geared motor includes a base frame A, a motor B, an output mechanism C, and a gear train D for deceleration for transmitting the rotational force of the motor to the output mechanism C. It is configured with the following. In the middle of the tooth gear train D above the father, there is a clasochi E.
An operating mechanism F is attached to the clutch E.

The base frame A is formed by bonding and integrating the first to fourth elements 1 to 4.

Next, as the motor B, a small motor known as a timer motor is used.The motor B is composed of a stator 6 and a rotor 7, as is well known. Stator 6
The yoke 89 is composed of the first and second elements 1.2 of the base frame A, and the coil 10 is interposed between the yokes 8 and 9. Both yokes 8.9 are made of a magnetic material, and have their respective outer peripheries connected to each other to reduce the magnetic resistance there.The inner peripheries are formed by cutting and raising a portion of each. Each has a plurality of magnetic pole pieces 8a and 9a. On the other hand, the rotor 7 is constructed by attaching an annular permanent magnet 12 having a large number of magnetic poles arranged on its outer circumferential surface to a boss 11 made of synthetic resin, and is fixed to the center of the yoke 8. rotor shaft l3
It is rotatably mounted on the. Note that 14 is a pinion integrally molded with the boss I1, and 15 is a well-known anti-reverse member for preventing the rotor from reversing.

Next, the output mechanism C described in item 12 will be explained. 17 is base frame A
An output gear 18 and an output lever 19, which is an example of an output member, are attached to the output shaft rotatably pivoted to the output shaft.
Reference numeral 20 denotes a connecting pin provided on the output lever, to which a load, such as the opening/closing mechanism of a ventilation fan or the drain valve of an electric washing machine, is connected. 2l is output rehar 1
9 and the return spring tensioned between element 4 in the base.

Next, the gear train D is configured to decelerate the rotation of the rotor 7 and transmit it to the output gear 18, and is constructed by combining a plurality of gears.

Next, the clutch E is connected to each gear 23.
24, the clutch element 25 is rotatable with respect to the shaft 27 fixed to the second element 2 in the base frame, and the clutch element 26 is rotatable and rotates along the axis. It is attached so that it can be moved forward or backward in any direction. Each of the above Krasochi elements 25. Reference numeral 26 includes engaging portions 25a, 2 (ia) on mutually opposing surfaces that can be engaged and disengaged from each other. The clutch element 26 is exemplified as a movable portion in the clutch E, and is a portion operated by the operating mechanism F. 28. In addition, 29 is both clasochi elements 25. 2
This is a separation spring interposed between 6 and 6.

Next, the operation mechanism F will be explained. 31 is the magnetic core,
It is made of a magnetic material such as iron and is formed integrally with the rotor shaft l3, and a known shade coil 32 is provided at the tip. A clutch operation piece 33 is made of a magnetic material, and its base is supported by a support piece 34 that is formed integrally with the yoke 9 by cutting and raising a part thereof. Further, the intermediate portion is connected to the end face of the magnetic core 31,
The tip portions are respectively opposed to the operated portions 28 of the above-mentioned clasps. Note that 35 is a return spring.

Next, a locking means provided for locking the rotation of the rotor 7 in the motor B will be explained. 38 is a stop piece attached to the output gear 18, and is formed integrally with the gear 18, but is the pin attached to the gear 18 later? It may be configured as follows. Reference numeral 39 denotes a stop portion provided on the rotor tough, which is constituted by the outer circumferential surface of a bulge portion integrally formed with the boss. The stop may be a relatively smooth surface, a rough surface, or a surface provided with many irregularities.

Next, the third diagram shows the electrical connection of the geared motor with the above configuration, in which a 74m plug 42 is connected to the coil 10 of the motor B via a switch 41.

Next, the operation of the geared motor having the above configuration will be explained. When the switch 41 is in the open state, the operating mechanism F is in the state shown in FIG. 2, each member of the output mechanism C is in the starting position, and the stop piece 3B of the locking means is in the state shown in FIG. It is away from the stop 39.

When the switch 41 is turned on in the above state, the coil 10 is energized, and the magnetic flux generated from the coil 10 for rotating the rotor reaches the magnetic pole pieces 8a, 9a of the yoke 8.9, and the magnetic flux between them and the magnet l2 in the rotor. The rotor 7 rotates due to magnetic attraction and repulsion with the magnetic poles. Further, the magnetic flux extends to the magnetic core 3l through the rotor shaft 13, and the magnetic core 31 is exposed. Then, the operating piece 33 is attracted to the magnetic core 31 as shown in FIG. As a result, as shown in the figure, the operated portion 28 of the clutch E is pushed by the operation piece 33, the clutch element 26 is displaced toward the clutch element 25, and the mutual engaging portion 25a. 26a is engaged. Uμchi clutch E is connected.

When the clutch E is connected as described above, the rotor 7. Rotation force is code 14. 23, 25, 26. It is transmitted to the output gear 18 through various members indicated by 24 and a large number of gears in the gear train D, and the output shaft l7, output lever 19, etc. rotate in the direction of the arrow in FIG. This rotation is used to drive the load.

When the output lever I9 reaches the final position due to the above rotation,
As shown in FIG. 6, the stop piece 3 comes into contact with the stop portion 39, and the rotation of the rotor 7 is locked. Then, the above-mentioned driving force is no longer transmitted to the output shaft 17, and as a result, the load is prevented from being moved excessively and being damaged.

Next, when the power supply to the coil 10 of the motor B is stopped, the magnetic flux disappears. Then, the rotary force of the rotor disappears.

Further, due to the extinction of the magnetic flux, the magnetization of the magnetic core 31 is released,
The operating piece 33 is released from the magnetic core 31 and returned by the spring 35 as shown in FIG. As a result, the clutch element 26 in the clutch E is separated from the clutch element 25 as shown in the figure by the urging force of the spring 29, and the clutch element 26 is in a disengaged state. As a result, the output mechanism C becomes free,
The load also becomes free. In this case, in this example, the output mechanism C returns to the starting position shown in FIG. 1 due to the biasing force of the return spring 21. In some cases, the load is provided with a return means having the same function as the return spring 21, and the load is returned by the return force of the return means.

〔Effect of the invention〕

As described above, in the present invention, when it is desired to drive a load, by energizing the coil 10 of the motor B, the rotor 7 rotates and the clutch E is turned on, thereby preventing the rotation of the rotor 7. The load is transmitted to the output member and transferred to the motor B.
The effect is that it can be easily driven using the rotational force of. On the other hand, when it is desired to stop driving the load and allow it to move freely, by stopping the power supply to the coil 10, the clutch E is disengaged and the edge between the output member indicated by L and the rotor 7 is disengaged. Even if the rotor 7 is difficult to rotate when the motor B is de-energized,
- It has the effect of enabling free movement of the load described in (h).

Moreover, even if the clutch E is made to take care of itself as described above, the operating piece 33 is attracted to and released from the magnetic core 3l depending on the presence or absence of magnetic flux from the coil 10 of the motor B, and that movement is utilized. Since it is configured to take care of the above-mentioned Kula 7,000E, it has the advantage that only extremely inexpensive parts are needed for the structure for performing the above-mentioned Hitokiri. This has the economical effect of making it unnecessary to use an expensive electromagnet as in the conventional configuration, and reducing the price of the gear motor.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and Fig. 1 is a front view showing the internal structure of the geared motor, Fig. 2 is a longitudinal sectional view showing the power transmission path, Fig. 3 is an electrical connection diagram, and Fig. 4 is a front view showing the internal structure of the geared motor. Figure 5 is a longitudinal cross-sectional view showing the operating mechanism with the clutch engaged, and Figure 6 shows the output mechanism force at the winter end position. FIG. 7 is a diagram illustrating the state of the mouth/7k means when the state is reached. A...Base frame, B...Motor, C...Output mechanism, D
...Tooth train, E...Clutch, F...Operating mechanism, 1
0...Coil, 3l...Magnetic core, 33...Operation piece.

Claims (1)

[Claims] A motor includes a coil for generating magnetic flux for rotating the rotor and a rotor that rotates by the magnetic flux emitted from the coil, and an output member for driving a load, and the rotor in the motor and the output member are connected to each other. In a geared motor, the gears are connected by a gear train for deceleration with a clutch in the middle, and the clutch is provided with an operating mechanism for turning it on and off.
The operating mechanism is composed of a magnetic core that is magnetized by magnetic flux emitted from the coil, and an operating piece attached to the magnetic core so as to be attracted or released depending on whether or not it is magnetized. A geared motor in which the operating piece is connected to a movable part of the clutch so that the operating piece is attracted to and released from the magnetic core to turn on and off the clutch, respectively.