KR101306467B1 - Switch equipped with a locking functionality - Google Patents

Abstract

PURPOSE: A switch with a locking function is provided to sustain the contact pressure of two planer electrodes, thereby implementing the stable current conducting. CONSTITUTION: A driven lever protrusion (225) is provided in the lower part of a driven lever (222). A latch pin (250) is close to the driven lever protrusion. The latch pin locks the driven lever. A driving lever protrusion is provided in the lower part of a driving lever (212). A latch cam (253) is positioned on the rotation route of the driving lever protrusion.

Description

Switchgear with locking function {SWITCH EQUIPPED WITH A LOCKING FUNCTIONALITY}

The present invention relates to a switch, and more particularly, to a switch having a mechanism that can cancel the repulsive force when the flat plate electrode is inserted.

In distribution lines, switches using SF6 gas as an insulating medium have been used to date. However, SF6 gas is a gas that plays a leading role in global warming by destroying the earth's ozone layer. Therefore, in recent years, improvements to eco-friendly products are required.

Accordingly, an eco-friendly switch using a vacuum interrupter that can cut off a load current or an overcurrent in an ultra-vacuum state has recently emerged.

The switch using SF6 Gas has a structure in which a movable electrode is inserted into a fixed electrode using a tulip type contact. In contrast, a switch using a vacuum interrupter has a structure in which a fixed electrode and a movable electrode conduct current by contacting a circular flat electrode.

In the case of using such a flat plate type electrode, there are shocks and tremors when two plate electrodes collide with a high-speed strong impact at the initial stage during the feeding operation, and maintain contact pressure between the two plate electrodes for stable current supply. There was a problem that was difficult.

Accordingly, the present invention eliminates the shock and vibration of the movable electrode due to the high-speed strong impact at the initial stage of the charging operation when the flat plate type electrode is used, and maintains the contact pressure between the two flat plate electrodes to enable stable current flow. To provide a switch that can be.

Other objects of the present invention will be readily understood through the following description of the embodiments.

Switch according to a preferred embodiment of the present invention for achieving the object as described above, in the switchgear having a locking function, driven driven lever provided in the driven lever; And a latch pin that is in close contact with the driven lever projection and locks the driven lever in response to entering the close state.

Here, the main rover projection provided on the main rover lower; And a latch cam provided on the latch pin and positioned on the main lever lever projection rotation path, wherein the latch cam is rotated during rotation of the main lever lever projection when the switch is switched from the closed state to the open state. When the latch pin is rotated by being pushed by the main lever, the locking of the driven lever can be released.

And, the latch pin, the groove-shaped projection moving groove located on the rotation path of the driven lever projection; And a latch shaft positioned below the protrusion moving groove and in close contact with the driven lever protrusion when the driven lever is locked, the torsion spring is fixed on the latch pin, and the torsion spring is in an initial state. The latch pin may be fixedly installed on the latch pin so that the latch pin locks the driven lever.

In addition, the torsion spring is filled with an elastic force during the rotation of the latch pin while the driven lever projection rotates when the switch is switched from the open state to the closed state, the driven lever projection passes through the projection moving groove In response to the filled elastic force rotating the latch pin in the rotational direction of the driven lever projection so that the side of the driven lever projection adheres to the latch shaft to lock the driven lever. Can be.

In addition, the latch pin may be located below the rotation path of the driven lever.

As described above, the present invention eliminates the shock and vibration of the movable electrode due to the high-speed, high impact at the initial stage during the charging operation when the plate type electrode is used, and maintains the contact pressure between the two plate electrodes by the locking structure. By making it stable, it is possible to enable stable current energization.

1 is a view schematically showing a switchgear according to a preferred embodiment of the present invention from the front.
Figure 2 shows a schematic view from the side of the switch according to an embodiment of the present invention.
3 is a view schematically showing the open state of the switch according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention.

Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

First, with reference to the accompanying Figure 1, the opening and closing operation of the switch of the present invention will be described schematically. 1 is a view schematically showing a switchgear according to a preferred embodiment of the present invention from the front.

Referring to FIG. 1, the attenuator 1 may include a crank 211 connected at one side to a main drive lever 212 and at a side connected to a shaft of a motor 100. As the crank 211 is rotated by one side by the motor 100, the other side may move up and down along the first guide hole 213 on the guide plate 300. At this time, the main lever (212) can be rotated about the first axis (271) by moving up and down while the other side of the crank 211 is guided by the first guide hole (213). To this end, the first guide hole 213 may be formed in an arc shape centering on the first axis 271. One side of the main lever (212) may be rotatably fixed to the first shaft (271), the other side may be fixed to the first spring support member (214). On the lower side of the main lever 212, a main lever lever 215 may be provided. Main mover lever projection 215 may be formed integrally or separately from the main mover 212.

The driven lever 222 may be installed to be rotatable about the first shaft 271. The driven lever 222 may be in front of or behind the main lever 212. The driven lever 222 may be rotated while being guided by the second guide hole 223 on the guide plate 300. To this end, the second guide hole 223 may be formed in an arc shape with the center of the first axis 271. One side of the driven lever 222 may be rotatably fixed to the first shaft 271, and the second spring support member 224 may be fixedly installed at the other side. The driven lever 222 may be provided with a driven lever projection 225 on the lower side. The driven lever projection 225 may be formed integrally or separately from the driven lever 222.

One side of the spring (not shown) may be fixed to the first spring support member 214, and the other side thereof may be fixed to the second spring support member 224. The spring is filled with an elastic force during the increase in the separation distance between the first spring support member 214 and the second spring support member 224 in the process of moving the main lever (212) up or down by the crank 211 can do. Then, the spring starts to decrease after the separation distance between the first spring support member 214 and the second spring support member 224 reaches a maximum (in other words, the main lever 212 and the driven lever 222). The first shaft 271 is pulled by pulling the second spring support member 224 with the filled elastic force when the gap between the main lever 212 and the driven lever 222 begins to decrease after The driven lever 222 can be rotated about the rotation.

The operation link 241 may be fixedly installed on the driven lever 222. The operation link 241 may move up and down according to the vertical movement of the driven lever 222. As the movable electrode moves along the vertical movement of the operation link 241, a closing or opening operation of the switch 1 may be performed.

Hereinafter, a locking means according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 3. Figure 2 shows a schematic view from the side of the switch according to an embodiment of the present invention. 3 is a view schematically showing the open state of the switch according to an embodiment of the present invention.

The locking means 250 may be installed on the rotation path of the main lever lever 215 and the driven lever protrusion 225. At this time, the locking means 250 may be installed on the rotation path lower region of the main lever 212 and the driven lever 222.

The locking means 250 may be rotatably installed with the axis 3rd axis 253 installed in a direction perpendicular to the rotation path of the main lever lever 215 and the driven lever protrusion 225. The locking means 250 may be cylindrical.

The locking means 250 may include a protrusion moving groove 251 having a groove shape having a width greater than or equal to the width of the driven lever protrusion 225. In addition, the locking means 250 may include a latch shaft 252 positioned below the protrusion movement groove 251. The protrusion moving groove 251 and the latch shaft 252 may be positioned corresponding to the rotation path of the driven lever protrusion 225. The latch shaft 252 is brought into close contact with the side of the driven lever projection 225 in response to the driven lever 222 entering the close position (in other words, the driven lever projection 225 or driven shaft). By locking the burr 222), the driven lever 222 can be prevented from vibrating due to the repulsive force at the time of injection. In addition, the latch cam 253 may be fixed on the locking means 250. The latch cam 253 may protrude to the outside of the locking means 250. The latch cam 253 may be positioned on a rotation path of the main lever lever 215. In the state where the driven lever 222 is locked by the latch shaft 252, the latch cam 253 is pushed by the main lever lever 215 while the main lever 212 is rotated during the opening operation of the actuator. The pin 250 may rotate in a direction opposite to the direction of rotation of the main lever 212. At this time, the locking of the driven lever 222 by the latch shaft 252 is released and the state in which the lower end of the driven lever protrusion 225 is caught by the latch shaft 252 may be released. Thereby, the lower end of the driven lever projection 225 is exposed to the projection moving groove 251, and the driven lever projection 225 can rotate while passing through the projection moving groove 251.

The torsion spring 261 may be fixed to the locking means 250. The torsion spring 261 may allow the locking means 250 to be in a locked state in a state where the elastic force is not filled (hereinafter referred to as an "initial state"). Here, the locking state may mean "a state in which at least a part of the latch shaft is located inside the outermost rotation radius of the side positioned on the side of the latch shaft 252 in the closed state of the driven lever protrusion 225." Both ends of the torsion spring 250 may be exposed to the outside of the locking means 250, and one end may be fixed by the fixing pin 262. Then, the stepper 263 may be fixedly installed on the rotation path of the other end of the locking means 250. The stepper 263 may limit the rotation width of the other end of the locking means 250.

Hereinafter, with reference to FIGS. 1 to 3, the locking and unlocking operations will be described. Descriptions of overlapping descriptions will be omitted or simplified.

Referring to FIG. 1, the solid line indicates the positions of the main lever 212 and the driven lever 222 when the switch is in a closed state. In the closed state, latch cam 250 may be in an initial position (A position). At this time, the left lower surface of the driven lever projection 225 is caught by the latch shaft 252, the driven lever 222 may be locked. In FIG. 1, 252a represents the top surface of the latch shaft 252.

When switching from the closed state to the open state, the main drive lever 212 can move downward while rotating counterclockwise by the rotation of the motor 1 and the induction of the crank 211. At this time, while the main lever lever projection 215 rotates about the first shaft 271, by pushing the latch cam 253, the latch pin 250 clockwise about the third shaft 254 to the axis. While rotating, the locking of the latch shaft 252 is expressed differently, the state in which the right side surface of the latch shaft 252 and the left lower surface of the driven lever protrusion 225 are in close contact with each other may be released. At the same time as the release, the driven lever projection 225 may rotate clockwise via the projection moving groove 251 by the elastic force filled in the spring by the rotation of the main lever (212). As a result, the driven lever 222 may be located in an open state.

As a result, as shown in FIG. 3, the main lever 212 and the driven lever 222 may be in an open state.

When the switch is switched from the open state to the closed state, the main drive lever 212 can move upward while rotating clockwise by the rotation of the motor 1 and the induction of the crank 211. At this time, when the main lever (212) is in line with the driven lever 222, the spring is filled with the maximum elastic force, when the main lever (212) is moved in a straight line with the driven lever (222) out of the state By the driven lever 222 is pulled by the elastic force of the spring, the driven lever 222 can rotate in a counterclockwise direction. At this time, while the driven lever projection 225 rotates in the counterclockwise direction, the latch pin 250 may rotate in the clockwise direction by pushing the upper surface 252a of the latch shaft 252. While the driven lever projection 225 passes through the projection moving groove 251, the elastic force may be filled in the torsion spring 261 by the rotation of the latch pin 250. When the driven lever projection 225 completes the passage of the projection movement groove 251, the latch pin 250 is in a locked state (A position in FIG. 1) by the rotation of the torsion spring 261 in the counterclockwise direction. ) Can be located. As a result, rocking may be performed on the driven lever protrusion 225 and the driven lever 222. At this time, the stepper 263 is located on the rotation path of one end of the torsion spring 261 to limit the rotation of the torsion spring 261, thereby the latch pin 250 by the rotation of the torsion spring 261 When entering the locking state (A state of FIG. 1), it is possible to prevent the locking state from being released by vibration due to excessive rotation.

As described above, according to the present invention, when the driven lever 222 enters the closed position and the latch pin 250 locks the driven lever 222 by the elastic force of the torsion spring 261, Vibration due to the repulsive force of the plate electrode can be eliminated during the introduction.

The above operation may be designed to be reversed. The main lever may also be located in front of the driven lever based on the front surface. It may belong to the scope of the present invention as long as it is a structure that can be locked in close contact with the driven lever projection upon entering the closed state from the open state.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

1: switchgear
100: motor
211: crank
212: Main Lever
213: first guide hole
214: first spring support member
215: turning head
222: driven lever
223: second guide hole
224: second spring support member
225: driven lever
250: latch pin
251: turning movement groove
252: latch shaft
253: latch cam
254: third axis
261: torsion spring
271: first axis
300: guide plate

Claims (5)

In the switchgear with a locking function,
Driven lever projections provided on the driven lever; And
And a latch pin close to the driven lever projection to lock the driven lever in response to entering the close state of the switch,
A main lever lever provided on the main lever; And a latch cam provided on the latch pin and positioned on the main lever lever projection path.
When the latch pin is rotated by the latch cam being pushed by the main lever lever during rotation of the main lever lever when the switch is switched from the closed state to the open state, the locking of the driven lever is released.
The latch pin,
A groove-shaped projection moving groove located on a rotation path of the driven lever projection; And
Located on the bottom of the projection moving groove further comprises a latch shaft in close contact with the driven lever projection when locking the driven lever,
Torsion spring is fixed on the latch pin,
And the torsion spring is fixedly installed on the latch pin so that the latch pin locks the driven lever in an initial state. delete delete The method of claim 1,
The torsion spring,
When the switch is switched from the open state to the closed state, the driven lever protrusion rotates to fill an elastic force while rotating the latch pin, and the driven lever protrusion is filled in response to passing through the protrusion moving groove. And locking the driven lever by rotating the latch pin in a rotational direction of the driven lever projection with an elastic force to bring the side portion of the driven lever projection into close contact with the latch shaft. The method of claim 1,
The latch pin is a switch, characterized in that located in the lower portion of the rotary path of the driven lever.

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