JPS5921471Y2 - Electric operating device for disconnector - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electric operating device for a disconnector that increases the force for opening and closing the disconnector.

Generally, automatic operating devices for disconnecting switches mainly include a compressed air operating type and an electric operating type.

The former uses a compressed air source such as a compressor, but it requires an airtight structure and uses a solenoid valve, and tends to be quite complex in structure.
There are drawbacks such as difficulty in processing and assembly, difficulty in handling, large size of the device, and considerable cost.

Furthermore, in the past, air circuit breakers were often used, so it was easy to obtain a compressed air source. is becoming extremely difficult.

In addition, the latter uses a rotary electric motor, and a conventional electric operating device for a disconnector of this type is equipped with a reversible rotary electric motor 2 at the left end of an outer frame 1, as shown in FIG.
A pinion 3 is attached to the tip of the rotating shaft of the reversible rotating electric motor 2,
A worm 5 rotatably supported by two bearings 4 such as a bearing is attached to the center of the frame 1, and a spur gear 6 is fixed to the first part of the worm 5. pinion 3 respectively.
, are meshed with the spur gear 6 to slow down the rotation of the reversible rotary electric motor 2 and rotate the worm 5.

Further, an operating shaft 8 is provided on the upper part of the worm 5 and is perpendicular to the worm 5 and rotatably supported by two bearings (not shown) such as a bearing. , the worm wheel 9 is attached to the operating shaft 8.
Then, the operating arm 10 is fixed, the worm wheel 9 is engaged with the worm 5, the rotation of the worm 5 is transmitted to the worm wheel 9 and the operating arm 10, the operating arm 10 is moved in the direction of the arrow, and the disconnector is opened and closed. It is carried out.

The other end of the worm 5 is located inside the locking device 11 and has a polygonal shape for manual operation.

However, this type of electric operating device for disconnectors is
Because a worm gear device consisting of a
Since there is very little contact surface with the surface, the surface pressure increases and galling is likely to occur on the contact surface.

Furthermore, since the rotational speed of the operation @10 is constant with respect to the rotation of the worm 5, in order to increase the operating force for opening and closing the disconnector, it is necessary to use a reversible rotary motor 2 with a large output, or to use a worm. It is necessary to reduce the pitch of each of the worm 5 and the worm wheel 9, and the radius of the worm 5 and the worm wheel 9 to be 11 and 1, respectively.
If it is set to 2, it is necessary to increase the size of 12/11, which has the drawback of making the device large and expensive.

In addition, as the external size of the device increases, the low pressure chamber of the cubicle becomes extremely large.Furthermore, if it is impossible to increase the output with a worm gear device, boosting measures such as multistage spur gears are required. However, the disadvantage is that the device becomes quite complex, has a large number of parts, and is extremely difficult to handle.

This idea was made with the above points in mind,
Next, this invention will be explained in detail with reference to FIG. 2 showing one embodiment thereof.

In the drawings, the same symbols as in FIG. 1 indicate the same parts, 12 is a main shaft rotatably supported by the frame 1' by a bearing 4, and 13 is fixed to one end of the main shaft 12 and meshed with a pinion 3. A reduction spur gear, 14 is a square bevel formed in the center of the main shaft 12, 15 is a slider that is screwed into the square screw 14 of the main shaft 12 and slides on the main shaft 12 as the main shaft 12 rotates, 16 is a A first connecting arm 17 has one end fixed to the operating shaft 8; a second connecting arm 17 has one end rotatably attached to the other end of the first connecting arm 16, and the other end attached to the slider 15;
18 is a stopper for the slider 15 attached to both ends of the square screw 14, and 19 is an operating handle for manual operation that is fitably attached to the other end of the main shaft 12.

The rotation of the operating arm 10 fixed to the operating shaft 8 rotates the rotating rod 21 around the fulcrum 22 via the connecting rod 20, rotates the auxiliary rod 23 integrated with the rotating rod 21, and further rotates the driving rod 21. 24, the switch 26 of the disconnector 25 is moved.

As shown in the figure, when the disconnector 25 is in the closed state, the first connecting arm 16 and the second connecting arm 17 are approximately perpendicular to each other, and the second connecting arm 17 and the main shaft 12 are horizontally orthogonal to each other. It has been taken.

Next, the operation of the above embodiment will be explained.

When the reversible rotary motor 2 is turned on and rotated in the closed state of the disconnector 25 shown by the solid line in FIG. 2, the pinion 3,
The main shaft 12 is decelerated via the spur gear 13.

The increased rotational force is transmitted, and the slider 15 screwed into the square screw 14 slides on the main shaft 12 to the right.

Then, due to the sliding of the slider 15, the second connection @17 follows while changing the angle with the main shaft 12, and at the same time the first connection @
16 also rotates around the operating shaft 8 while changing its angle with the second connecting arm 17.

The rotational force of the first connecting arm 16 is transmitted to the operating arm 10 integrated with the first connecting arm 16 via the operating shaft 8, and
An opening operating force is applied to the disconnector 25 through the like.

By the way, when the switch 26 comes into contact with the contact 26',
The greatest operating force is required.

As shown in the figure, the first connecting arm 16 and the second connecting arm 17, and the second connecting arm 17 and the main shaft 12 are almost perpendicular to each other, so that
The rotation angle of the first connecting arm 16 becomes smaller than the movement of the slider 15, and the rotational force of the main shaft 12 is extremely reduced and increased by nine times, making it possible to transmit the largest force to the first connecting arm 16. ,
The disconnector 25 can be easily operated.

Note that when the opening operation of the disconnector 25 is completed and the reversible rotary motor 2 is stopped by a control circuit (not shown), the slider 15 moves slightly due to the inertia of the reversible rotary motor 2. However, when the disconnector 25 is closed, the first connecting arm 16 is almost at a standstill compared to the slight movement of the slider 15, so there is no problem with the disconnector 25. Even if the disconnector 25 is opened, the disconnector 25 will not be affected.

Further, when the disconnector 25 is turned on, the reversible rotary electric motor 2 is rotated in the reverse direction by a control circuit (not shown).

Therefore, the rotation of the reversible rotary electric motor 2 can be sufficiently decelerated and increased by 9 times using only the pinion 3 and the spur gear 13. Furthermore, the pitch of the square screw 14 is small compared to a worm gear device, and the square screw 14 is formed with a small pitch. The radius of the main shaft 12 is l'
1, and when the shortest distance from the center of the operating shaft 8 to the center of the square screw 14 is l'2, 12'/11' can be made very large. The disconnector 25 that can give the greatest force
The operating force and performance of the machine can be dramatically improved.

In addition, there is no need to take boosting measures such as conventional two-stage spur gears, and there is no need to make the reversible rotating electric motor 2 large, making the device small and lightweight and easy to handle. It can be made cheap.

Furthermore, since the contact surface between the square screw 14 and the slider 15 can be made very wide, the surface pressure can be reduced and galling on the contact surface can be prevented.

In addition, in the illustrated closing state of the disconnector 25, the disconnector 2
Even if the electromagnetic force due to the short-circuit current flowing from the blade 5 or the force of the blade's own weight flows back into the device, the device will not be activated or damaged.

As described above, according to the electric operating device for a disconnector of this invention, a screw is formed on the main shaft linked to the reversible rotating electric motor,
A slider that is screwed onto the screw is slidably attached to the main shaft, and a rotational force is applied to the operating shaft perpendicular to the main shaft at a distance, and to the other end of the operating arm, one end of which is connected to the disconnector, and to the operating arm. One end of the first connecting arm that transmits the transmission is fixed, one end of the second connecting arm is rotatably attached to the other end of the first connecting arm, and a slider is attached to the other end of the second connecting arm to disconnect the disconnection. When the container is loaded,
By making the main shaft and the second connecting arm substantially orthogonal, and by making the first connecting arm and the second connecting arm substantially orthogonal, the operating force for opening and closing the disconnector can be dramatically increased.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of a conventional electric operating device for a disconnector, and FIG. 2 is a cutaway front view of an embodiment of the electric operating device for a disconnector according to the present invention. 2... Reversible rotating electric motor, 8... Operating shaft, 10... Operating arm, 12... Main shaft, 1
4...Screw, 15...Slider, 16.
...First connecting arm, 17... Second connecting arm,
25...Disconnector.

Claims (1)

[Scope of utility model registration request] A screw is formed on a main shaft that is linked to a reversible rotating electric motor, a slider that is screwed onto the screw is slidably attached to the main shaft, and one end is attached to an operating shaft perpendicular to the main shaft at a distance. The other end of the operating arm connected to the disconnector and one end of the first connecting arm that transmits rotational force to the operating arm are fixed, and one end of the second connecting arm is rotatably attached to the other end of the first connecting arm. At the same time, the slider is attached to the other end of the second connecting arm, and when the disconnector is in the closed state, the main shaft and the second connecting arm are substantially perpendicular to each other, and the first connecting arm and An electric operating device for a disconnector in which the second connecting arm is substantially orthogonal to the second connecting arm.