JPS6033536Y2 - Electric operating device for disconnector - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electrically operated operating device for disconnecting which increases the opening/closing force of a disconnecting switch and which is small, lightweight, and inexpensive.

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, uses electromagnetic pieces, 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 one end of the worm 5. Gears 7 and 7' are connected to pinion 3,
It meshes with the spur gear 6 to slow down the rotation of the reversible rotary 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.
and the operating arm 10 is fixed, the worm wheel 9 is engaged with the worm 5 1, and the rotation of the worm 5 is transmitted to the operating arm 10 via the worm wheel 9 and the operating shaft 8.
is moved in the direction of the arrow to open and close the disconnector.

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

However, since this type of electric disconnection operating device uses a worm gear device consisting of a worm 5 and a worm wheel 9, the transmission efficiency of rotational force is poor, and when transmitting the rotational force of the worm 5, the worm 5 Since the contact surface between the worm wheel 9 and the worm wheel 9 is very small, the surface pressure increases and galling is likely to occur on the contact surface.

Since the rotation speed of the operating arm 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, a reversible rotary motor with a large output is used. It is necessary to reduce the pitch of each of the wheels 9, and if the radii of the worm 5 and worm wheel 9 are 1□ and 1□, respectively, it is necessary to increase 1°/1□, which increases the size of the device. It has the disadvantage of being 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 multi-stage spur gears are required, so the device becomes quite complex, and
The disadvantage is that the number of parts increases and handling becomes extremely difficult.

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.

In the drawings, the same symbols as in FIG. 1 indicate the same things, 12 is a main shaft rotatably supported by the frame 1 by a bearing 4, and 13 is a reduction gear fixed to one end of the main shaft 12 and meshed with the pinion 3. A spur gear 14 is a square screw formed in the center of the main shaft 12, and 15 is screwed into the square screw 14 of the main shaft 12 and rotates the main shaft 12 so that the main shaft 1 moves on the main shaft 12.
2, a slider that slides in the axial direction; 16, a guide such as a rotatable roller attached to both sides of the slider 15; 17, one end is fixed to the operating shaft 8, and the other end is slidable; A pair of connecting arms engaged with both guides 16 of the child 15, 18 is a notch formed at the other end of the connecting arm 17 in the longitudinal direction of the connecting arm 17, and has a width larger than the diameter of the guide 16. The guide 16 is slidably inserted and engaged with the guide 16.

Reference numeral 19 denotes a sloped portion formed on both sides of the notch 18 at the tip of the connecting arm 17, connected to the notch 18 and inclined at approximately 45 degrees with respect to the longitudinal direction of the notch 18, which prevents the guide 16 from moving beyond a predetermined position. On the other hand, play is provided so that the connecting arm 17 does not rotate beyond a certain angle.

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

Note that 27 is an operating bundle for manual operation that is fitably attached to the other end of the main shaft 12, and 28 is a stopper for the slider 15 that is attached to both ends of the square screw 14.

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.
The reduced and boosted rotational force is transmitted to the main shaft 12 via the spur gear 13, and the slider 15 screwed into the square screw 14 rotates the main shaft 1.
2 Slide the top to the right.

As the slider 15 slides, the guide 16 fits into the notch 18 of the connecting arm 17 and engages with the connecting arm 17, and the connecting arm 17 is decelerated and boosted counterclockwise by the slider 15. The slider 15 rotates in response to the applied force, transmits the rotational force to the operating arm 10 integrated with the connecting arm 17 via the operating shaft 8, applies an opening operating force to the disconnector 25, and the slider 15 moves to the right end. Disconnector 25
Terminate the operation.

When the reversible rotary motor 2 is stopped by a control circuit (not shown), the slider 15 may move slightly due to the inertia of the reversible rotary motor 2, but the connecting arm 17
Since the guide 16 is located on the inclined part 19 of the connecting arm 17
will not be rotated beyond a certain angle, and furthermore, the connecting arm 17 will not be separated from the guide 16.

Further, when the disconnector 25 is changed from an open state to a closed state, 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 boosted by the pinion 3 and the spur gear 13. Furthermore, the pitch of the square screw 14 is smaller than that of a worm gear device, and the square screw 14 is formed with a small pitch. When the radius of the main shaft 12 is 1'□ and the shortest distance from the center of the operating shaft 8 to the circumferential surface of the square screw 14 is 1'2, 1'2/l'l can be made very large. The operating force of the disconnector 25 can be dramatically increased, and the rotational force of the main shaft 12 can be transferred to the operating arm 1 without wasting it.
0 can be communicated.

Furthermore, when the switch 26 comes into contact with and separates from the contact 26',
The rotational speed of the operating arm 10 relative to the waist relative to the rotation of the main shaft 12 is extremely small, resulting in a very large force.

In addition, there is no need to take boosting measures such as 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, surface pressure can be reduced and galling on the contact surface can be prevented.

Furthermore, even if a short-circuit current flows through the blade 26 of the disconnector 25 in the closed state and a force acts in the direction of causing the blade 26 to pop out, the inclined portion 19 of the connecting arm 17 is in contact with the guide 16 in the right angle direction. , the connecting arm 17 does not rotate at all and will not operate or damage the device.

As described above, according to the electric operating device for a disconnector of this invention, there is a main shaft that is connected to a reversible rotating electric motor and rotates, a screw formed on the main shaft, and a screw that is screwed into the screw and slides in the axial direction of the main shaft. a movable slider, a guide formed on a side surface of the slider, an operating shaft perpendicular to the main axis at a distance, and an operating arm fixed to the operating shaft and connected to a disconnector; an operating arm fixed to the operating shaft; a notch formed in the longitudinal direction of the connecting arm at the distal end of the connecting arm into which the guide is slidably inserted and engaged; By providing sloped portions on both sides of the notch that extend to the notch and are inclined at an angle of about 45 degrees with respect to the longitudinal direction of the notch, the disconnector can be operated with a large opening/closing force, and is small, lightweight, and It can be made cheap.

In addition, even if a short circuit current flows through the blade of the disconnector in the closed state, and a force acts in the direction of causing the blade to pop out,
Since the inclined portion of the connecting arm abuts the guide in a perpendicular direction, the connecting arm does not rotate at all, and the device will not be activated or damaged.

Furthermore, even if the slider moves slightly due to the inertia of the motor when the motor is stopped, the guide is located on the slope of the connecting arm, so the connecting arm will not rotate beyond a certain angle. Furthermore, the connecting arm will not become detached from the guide.

[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.
...Guide, 17...Connected arm, 1 death...
...notch part, 19...slanted part, 25...
...Disconnector.

Claims (1)

[Scope of utility model registration request] A main shaft connected to a reversible rotating electric motor to rotate, a screw formed on the main shaft, a slider screwed onto the screw and slidable in the axial direction of the main shaft, and a slider formed on a side surface of the slider. an operating shaft that is perpendicular to the main shaft at a distance, and an operating arm that is fixed to the operating shaft and connected to a disconnector;
an operating arm fixed to the operating shaft; a notch formed in the longitudinal direction of the connecting arm at the distal end of the connecting arm into which the guide is slidably inserted and engaged; An electric operating device for disconnection, comprising inclined parts on both sides of the notch, which are connected to the notch and are inclined at an angle of about 45 degrees with respect to the longitudinal direction of the notch.