JPS6031135Y2 - Switch operating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an operating device used in a switch such as a disconnector.

In principle, the operating device used in the switch reduces the rotation of the operating motor, which is the drive source, using a speed reduction mechanism such as a gear, and then transfers this reduced driving force to the link mechanism of the switch. It opens and closes by transmitting information to the

In this case, completion of opening or closing of the switch is detected by actuating a limit switch as the link mechanism is driven, and the operation motor is stopped by cutting off power to the operation motor. .

However, even after the power supply is cut off, the operation motor rotates due to its inertial energy, so the driving force due to the inertial energy is transmitted to the link mechanism even though the opening or closing operation of the switch is completed.

Therefore, an impact force is applied to each part of the switch including the contact part, and in the worst case, it may cause damage to the equipment or make it difficult to maintain a predetermined insulation distance.

In order to solve this problem, conventionally, a dog clutch, an electric clutch, or the like is attached to the driving shaft, and the link mechanism is separated from the operating motor as appropriate.

Furthermore, in order to prevent the switch body from opening or closing automatically due to external forces such as earthquakes or other vibrations or natural wind, this type of switch operating device generally requires expensive locking devices or dead point configurations. It is necessary to provide a complicated link mechanism for this purpose.

However, since the dog clutch or electric clutch and the locking device of the switch or the link mechanism for configuring the dead center are provided separately according to their respective purposes,
Not only is the price expensive, but the mechanism is also complicated, leading to an increase in the size of the operating device.

In view of the drawbacks of the prior art described above, the technical object of the present invention is to provide a switch operating device that is mechanically simple, can be reduced in cost, and can be downsized.

The configuration of the present invention, which is distantly related to such an object, has a first lever that has a roller at its tip and rotates by a certain angle when driven by an operating motor, while the tip is bifurcated into a substantially Y-shape, The rotation of the first lever is continuous with two opposing recesses each having an arc cut out with a radius approximately equal to the distance between the rotation center and the end of the roller. A second lever is provided with a groove that can engage with the roller as the first lever rotates, and transmits this rotational force to the switch main body by the rotation of the first lever, and a second lever that is provided with a groove that can engage with the roller as the first lever rotates; The present invention is characterized in that it includes a limit switch that is actuated to stop the operating motor when the engagement with the groove is released.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, a gear 2 is fixed to the upper end of a rotating shaft 1a of an operating motor 1, which is a drive source, and a first gear 3a, which is a part of a reduction gear 3, meshes with this gear 2. ing.

A second gear 3c is fixed to the upper end of the shaft 3b above the first gear 3a to form a reduction gear system.

Furthermore, one end of the elliptical louver 4 meshes with the second gear 3C.

A pin 5 having a roller 6 attached to its tip is implanted at the other end of the second lever 4.

Further, on both sides of this lever 4, operating levers 7.7a are provided.
is a protruding part.

The operating lever 7.7a operates the limit switch 8 for opening and the limit switch 8a for closing at the final positions of the switch main body (not shown) for opening and closing operations, respectively.

A second lever 9, which is fixed to the upper end of the shaft 11 and engages with the roller 6 as the first lever 4 rotates, controls the operation shaft 14 through a gear 12 fixed to the lower end of the shaft 11. The driving force is transmitted to the gear 13 fixed to the lower end.

That is, the second lever 9 has a substantially Y-shape, and on the inside of its bifurcated tip, there is a center of rotation of the second lever 4, which is located between this rotation center and the end of the roller 6. Concave portions 9a and 9b are formed by cutting out circular arcs whose radius is approximately the distance, and grooves 9C continuous to the concave portions 9a and 9b are formed in the longitudinal direction to ensure rotation of the second lever 9 through approximately 90°. It is formed by cutting across the center.

At this time, the rotation of the second lever 9 is stopped by the stopper 10°10a.
It is now regulated by

Further, the operating shaft 14 passes through a hollow portion of a bearing 15 that rotatably supports the lever 4, and its upper end portion is connected to a link mechanism (not shown) of the switch.

If formed in this way, the overall volume of the operating device can be reduced, but if this point is ignored, it is not necessarily necessary to configure it as in this embodiment.

That is, the positions of the gear 13 and the operating shaft 14 are not particularly limited as long as the gear 13 can mesh with the gear 12.

Next, the operation of the operating device according to the above embodiment is illustrated in FIGS.
A detailed explanation will be given mainly based on FIGS. 2a to 2d with the addition of FIG. 2d.

FIG. 2a shows the state of the operating device when the switch is in the open state.

Now, when the operating motor 1 is energized, the rotating shaft 1a rotates clockwise.

This rotation is decelerated by the first gear aat shaft 3b and the second gear 3c, which are the speed reducer 3, and is transmitted to the first lever 4 meshing with the second gear 3c, and as a result, the first lever 4 moves clockwise. Rotate.

At the beginning of this rotation of the second lever 4, the roller 6 is
While abutting one recess 9a of the lever 9, press the four parts 9a.
, the rotation of the lever 4 is not transmitted to the second lever 9.

The final stage of this operation is shown in FIG. 2a.

Further rotation of the lever 4 causes the roller 6 to move into the groove 9c.
When engaged, the rotational force of the lever 4 is transmitted to the second lever 9.

As a result, the second lever 9 begins to rotate counterclockwise.

As the second lever 9 rotates, the shaft 11 and gear 12 also rotate together, so the counterclockwise rotational force is transmitted to the operating shaft 14 via the gear 13.
rotates clockwise.

The state during this operation is shown in FIG.

When the lever 4 further rotates clockwise, the R of the roller 6
9c and comes into contact with the other recess 9b, and the second lever 9 comes into contact with the stopper 10a and stops.

At this time, the switch completes its circuit closing operation and enters the closed circuit state, and the operating lever 7a operates the limit switch 8a, so that the power supply to the operating motor 1 is immediately stopped.

This state is shown in FIG. 2C.

At this time, the operation motor 1 rotates for a while due to surplus energy even though the power supply is stopped, so the operation motor 1 rotates for a while due to the surplus energy.
continues to rotate clockwise.

However, at this time, since the roller 6 of the second lever 4 is in contact with the recess 9b of the second lever 9, it rolls along the recess 9b.

Therefore, the rotational force of the lever 4 is not transmitted to the second lever 9, and eventually the rotation of the lever 4 also stops as the operating motor 1 stops.

This state is shown in FIG. 2d.

As a result, when the switch is in a state where the circuit is completely closed, that is, from the state shown in FIG. It is not transmitted to the main body and a good closed circuit state can be maintained.

On the other hand, when the circuit closing operation is completed, that is, in the state shown in FIG. Even if an attempt is made to rotate the lever 9 clockwise, the roller 6 of the second lever 4 is engaged with the recess 9b of the second lever 9, so this rotation is prevented.

This is because at this time, the external force acts only in the linear direction connecting the roller 6 and the center of rotation of the second lever 4, but does not act at all in the direction that causes the second lever 9 to rotate clockwise.

Therefore, in this closed circuit state, the second lever 9 cannot rotate clockwise, and the natural opening of the switch is prevented.

That is, the switch is locked in a closed state. On the other hand, since the circuit opening operation of the above embodiment can be performed in a completely opposite manner, the explanation thereof will be omitted.

Further, the open state is maintained in the same manner as the closed state by the contact between the roller 6 and the recess 9a.

As specifically explained above in conjunction with the embodiments, an engaging clutch or an electric clutch may be used to connect the mechanism for separating the inertial energy of the operating motor from the link mechanism and the mechanism for maintaining the open and closed states of the switch main body. Instead, it can be reduced to one simple mechanism centering on the first lever and the second lever, which not only makes it possible to reduce the cost, but also makes the device more compact.

Moreover, since the second lever always stops at the same position regardless of the inertial energy of the operating motor, the operation is also stabilized.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the present invention, Figures 2a to 2
In order to explain the operation, FIG. d is an explanatory diagram showing in order the open state, the state in the middle of the closing operation, the state at the completion of the closing operation, and the state where the metal has completely stopped after inertial energy has been applied. In the drawing, 1 is an operating motor, 4 is a lever, 6 is a roller,
8, 8a are limit switches, 9 is a second lever 91.
92 is a recess, and 9C is a groove.

Claims (1)

[Scope of utility model registration request] A first lever that has a roller at its tip and rotates at a certain angle about the base plate as a center of rotation when driven by an operating motor, and an arc whose radius is approximately the distance between the center of rotation of the first lever and the end of the roller. At the beginning and end of the rotation of the first ruver, there are four parts formed opposite each other on the inside of the tip part so that the roller comes into contact with it and slides thereon, and a concave part connected to the recessed part and cut at the center part in the longitudinal direction. A base plate portion having a substantially Y-shape with a tip portion split into two, and having a groove that engages with the roller between the initial stage and the final stage as the second lever rotates, and serves as the center of rotation. A second lever that transmits rotational force based on the rotation of the first lever to the switch main body via a shaft fixed to the lever is activated when the engagement between the roller and the groove accompanying the rotation of the second lever is released. a limit switch for stopping the operating motor;
A switch operating device having a stopper for regulating the position of the second lever to a position where the engagement between the roller and the groove is released as the second lever rotates.