JPS598014B2 - Instrument operating mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the operation mechanism of a disconnector used in power substation equipment or power receiving equipment, and other equipment requiring mechanical operation.

Conventionally, this type of operating mechanism includes a combination type of rotary lever or a gear type using a worm gear.
In the former case, in order to increase the rotational force (output) of the power shaft in response to an external operating force (input), it was necessary to increase the movement of the rotating lever or link, which required a large space.

On the other hand, with the latter, large output can be obtained in a small space by selecting gears, but this requires a large number of gears, and the gears must absorb all the reaction force when producing output. Because it had to be thrown, it was necessary to use high-precision gears made of high-strength materials and using advanced processing technology.

The present invention has been made in view of the above-mentioned ideas, and is designed to obtain the rotational force of the power shaft by utilizing the screwing relationship between the screw and the nut, and to release most of the reaction force applied to the screw to another member. This made it possible to obtain large output in a small space.

It attempts to provide a mechanism for operating the instrument.

An example of a disconnector will be described below with reference to the drawings.

The blade 1 is rotatably provided around its lower end as a fulcrum, and
By rotating clockwise, the upper part becomes the blade receiver 2.
It's starting to move away from.

One end of a link 3 is connected to the center of the blade 1, and the other end of the link 3 is connected to an arm 4 fixed to a power shaft 5.

Corresponding to the clockwise and counterclockwise rotations of the power shaft 5, the blade 1 rotates in the opening and closing directions.

On the other hand, reference numeral 7 denotes a wall for removing the entire disconnect switch, and an operating shaft 10 is mounted thereon by bearings 8 and 9 so as to be perpendicular to the power shaft 5. A nut 12 is screwed into the threaded portion 11 of 10.

A shaft portion is provided at both ends of this nut 12, and a roller 13 whose peripheral surface is in contact with the wall 7 and a link 14 pivotally connected to an arm 6 whose one end is fixed to the power shaft 5 are attached to the shaft portion. It is pivotally supported.

In the above configuration, if the operating shaft 10 is now rotated clockwise, the rotational force will be applied to the nut 12 as the threaded portion 11 rotates. , it cannot rotate and tries to descend downwards by the action of the screw.

Therefore, the link 14 pivoted on the nut 12 is connected to the arm 6.
Since the arm 6 rotates in a direction that widens the opening angle, the arm 6 rotates counterclockwise.

Therefore, a counterclockwise rotational force acts on the power shaft 5, and the arm 4 also rotates counterclockwise, pulling the link 3. As a result, the blade 1 also rotates counterclockwise, and the disconnector is turned off as a whole. I started working as a.

In such a series of operations, the arm 6 is attached to the nut 1.
2, a reaction force is generated that pushes the operating shaft 10 toward the wall 7, and this reaction force attempts to bend the operating shaft 10, but the roller 13, which is pivotally supported by the nut 12, is in contact with the wall 7. Therefore, the reaction force is not directed against the operating shaft 10, but against the roller 1.
It comes to act on the wall 7 through 3.

Therefore, since no reaction force acts on the operating shaft 10, the rotational force applied to the operating shaft 10, that is, the input, is sufficient to move the nut 12 up and down with an extremely small rotational force.

As described above, according to the above embodiment, the rotational force applied to the operation shaft only needs to be the rotational force for vertical movement of the nut, and the rotational force applied to the operation shaft is applied to the power shaft. To,
Since the output is generated by adding a rotational force equivalent to the reaction force of the load, it is possible to obtain a large output with a small input.

In addition, since no large force is applied to the threaded part of the operating shaft, its diameter can be made smaller and the screw pitch can be reduced, and the material and machining accuracy of the threaded part can be improved compared to conventional gear methods. High strength, high precision, etc. are no longer required.

Furthermore, since the entire device can be made compact due to the above points, even though a large output can be obtained for a small input, the required space can be extremely small.

As described above, the present invention provides an instrument operating mechanism that can transmit a large operating force in a small space.

[Brief explanation of drawings]

FIG. 1 is a side view of an operating mechanism according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line 1-2 in FIG. Explanation of symbols, 1...Blade, 2...Blade receiver, 3...Link, 4...Arm, 5...Power shaft,
6...Arm, 7...Wall, 8...Bearing, 9...
Bearing, 10... Operating shaft, 11... Threaded portion, 12...
・Nut, 13...Roller, 14...Link.

Claims (1)

[Claims] 1 Attach an operating shaft parallel to the wall via a bearing, screw a nut on which a link and a roller that contacts the wall are pivotally attached to the threaded part of the operating shaft, and rotate the link in a direction perpendicular to the operating shaft. It is pivoted to the arm of the power shaft installed in the
An operating mechanism for an instrument, characterized in that an input rotational force is applied to the operation shaft to obtain an output rotational force centered on the power shaft.