JPH06338243A - Operating mechanism for switch - Google Patents

Abstract

PURPOSE:To provide an operating mechanism for a switch which is of a simple structure, which can be formed compact, of which action is simple, which can be manufactured easily, and which is of low cost. CONSTITUTION:A device is provided with a spring member 35 pivotally attached between a rotary lever 29 to energize the spring member manually or by power, and an operation lever 33 engaged with a main shaft 9, and a changing lever 36 to select an operation direction of the main shaft 9. Holding hooks 39, 42 and 40, 43 to hold the operation lever 29 against energization force of the spring member are provided symmetrically about the center of the changing lever 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch operating mechanism, and more particularly, it has the functions of a disconnecting switch and a grounding device together, and is turned on (closed).
The present invention relates to a spring-type operating mechanism for a three-position ground switch, which performs operations in three position states of cutting (opening) and grounding with a single operating device.

[0002]

2. Description of the Related Art A disconnector with a grounding device is constructed so as to have the functions of both a disconnector and a grounding device, and operation in three position states of ON (closed), OFF (open) and grounding is performed by one operation. As a spring type operation mechanism of a so-called three-position switch (hereinafter, simply referred to as an operation mechanism) performed by the operation device, there is an operation mechanism illustrated in FIGS. 4 to 6. This operating mechanism is mounted on the disconnecting switch 1 with a grounding device as shown in FIG.

The disconnector 1 with a grounding device has an operating mechanism 3 installed below a disconnector body 2.

The disconnector body 2 has a first terminal 4 and a second terminal 6
And a third terminal 5, the first terminal 4 and the ground terminal (third terminal) 5 are arranged at predetermined internal positions, and the second terminal 6 is movable to switch between the first terminal 4 and the third terminal 5. It is connected to terminal 7.

The movable terminal 7 is moved by the link mechanism 8 interlocking with the operation mechanism 3 to the cut position indicated by the solid line in the figure and
The switching operation is performed between the grounding position connected to the grounding terminal 5 shown by the dotted chain line and the entry position shown by the three-dotted chain line.

This switching operation is performed by the operating mechanism 3 which operates quickly by utilizing the energy stored in the spring in order to minimize damage caused by arcing.

The operating mechanism 3 is constructed as shown in FIGS. 5 and 6. The operating mechanism 3 includes a main shaft 9 and a first operating shaft 1.
It has 0 and the 2nd operation axis 11.

The first operating shaft 10 and the second operating shaft 11 include
The spring levers 12 and 13 are fitted to each other, and the spring member 14 formed of a compression coil spring is mounted between the two spring levers 12 and 13. That is, one end of the spring member 14 is pivotally attached to the free end of the one spring lever 12, and the other end of the spring member 14 is pivotally attached to the free end of the other spring lever 13.

A main lever 15 formed in the shape of an entire piece is pivotally attached to the main shaft 9. A pin 16 is projectingly provided on the free end of one projecting piece 15a of the main lever 15.

Further, the root end of the first oblong hole link 18 is pivotally attached to the free end of the first link lever 17 fitted to the first operating shaft 10 and provided at the tip end portion of the first oblong hole link 18. The pin 16 is movably inserted into the elongated hole 19. With this,
The root end portion of the second elongated hole link 21 is pivotally attached to the free end portion of the second link lever 20 fitted to the second operation shaft 11, and the elongated hole 24 provided at the tip portion of the second elongated hole link 21 The main lever 15 is interlocked by inserting the pin 16 movably.

A part of the link mechanism 8 of the disconnector is pivotally attached to the free end of the other projecting piece 15b of the main lever 15 so as to interlock with the free end. Incidentally, 23, 26, 27 and 28 are stoppers.

Next, the operation of the above-mentioned conventional apparatus will be described.

In this device, the first operating shaft 10 is rotated counterclockwise to switch from the off state to the grounded state, and the second operating shaft 11 is rotated counterclockwise. It is designed by setting the direction of motion so that it will change from the OFF state to the ON state.

First, in order to shift from the OFF state shown in FIG. 4 to the ON state shown in FIG. 5, the second operating shaft 11 is rotated counterclockwise by a manual operating device or an electric operating device (not shown). According to this operation, the spring lever 13 rotates counterclockwise to store the spring member 14, and
The second elongated hole link 21 pivotally attached to the link lever 20 moves leftward in the drawing, but the pin 16 can move in the elongated hole 24, so that the main lever 15 is stationary. Further, the spring lever 13 is rotated to move to a dead point 2 on the mechanism.
When it exceeds 2, the spring lever 13 vigorously rotates due to the release of the stored energy, and the spring lever 13 contacts the stopper 23 and stops. On the other hand, the end of the elongated hole 24 comes into contact with the pin 16 and swivels the main lever 15 clockwise to reach the insertion position. In connection with this operation, the disconnector also shifts from the off state to the on state.

The operation of shifting from the ON state to the OFF state is the reverse of the above.

Next, description will be given of the case where the off state shown in FIG. 4 is changed to the grounded state shown in FIG. In this case,
The first operating shaft 10 is rotated counterclockwise by a manual operating device or the like (not shown). Then, the spring lever 12 rotates counterclockwise to store the spring member 14, and
The first elongated hole link 18 pivotally attached to the first link lever 17 moves to the right in the figure, but the pin 16 can move in the elongated hole 19, so that the main lever 15 is stationary. Further, the spring lever 12 is rotated to move to a dead point 2 on the mechanism.
When it exceeds 5, the spring 12 pivots vigorously due to the release of stored energy, and the spring lever 12 contacts the stopper 26 and stops. On the other hand, the end of the elongated hole 19 comes into contact with the pin 16 and swivels the main lever 15 counterclockwise to reach the grounding position. In conjunction with this operation, the disconnector also shifts from the off state to the grounded state.

The operation of shifting from the grounded state to the off state is the reverse of the above.

[0018]

In the conventional switch operating mechanism as described above, the angles formed by the elongated holes 19 and 24 of the two first elongated hole links 18 and the second elongated hole links 21 are reduced. , The frictional force between the first elongated hole link 18 and the second elongated hole link 21 during the operation of the mechanism becomes smaller as the mechanism is closer to the parallel, and a smooth operation can be obtained.
The elongated hole link 18 and the second elongated hole link 21 are arranged such that the angles formed by the elongated holes are close to parallel.

Therefore, the angle formed by the line segment connecting the main shaft 9 and the first operating shaft 10 and the line segment connecting the first operating shaft 10 and the second operating shaft 11 becomes an obtuse angle (about 130 degrees). The distance between the main shaft 9 and the second operation shaft 11 becomes significantly longer than the distance between the main shaft 9 and the first operation shaft 10. As a result, the total length of the second elongated hole link 21 becomes long, there is a lot of wasted space and the volume is large as a whole structure, and there is a problem that the production cost becomes high.

Further, the second elongated hole link 21 has the spring member 1
Since the first operation shaft 10 and the second operation shaft 11 respectively intersect with the shaft of No. 4, the spring lever and the first link lever, or the spring lever and the second link lever have a total of 4 in total.
There is a problem that two levers are needed and the number of members increases.

Further, in the mechanism as a whole, the operating angle of each lever and link is oblique, and there are few members that operate vertically or in parallel, so it is difficult to determine the angle of each member in terms of mechanism design. At the time of assembly, there is a problem that it is difficult to adjust the stroke of the long hole link or the like.

In view of the above points, it is an object of the present invention to newly provide an inexpensive switch operating mechanism which has a simple structure, can be downsized, has a simple operation, and can be easily manufactured.

[0023]

Means for solving the above-mentioned problems in the present invention is to arrange a first terminal and a third terminal, to connect to a second terminal, and to pivot one end thereof. In a switch operating mechanism in which a movable terminal is arranged and the movable terminal is driven by a main shaft of an operating mechanism via a lever, a link, etc., a rotary lever equipped with a crank pin and manually or electrically rotated and a rotary lever are provided. One end is pivotally attached to a stopper which is held at a predetermined position, an operation lever which is fitted to the main shaft, and a pin protruding from the free end of the operation lever, and the other end is pivotally attached to the crank pin to rotate the rotation. A spring member that stores energy by the rotation of the lever, a switching lever that selects the operating direction of the spindle, a pin that holds the switching lever in the switching position, and a cut position in the operating direction of the selected spindle. The location, a switching position holding hooks for holding the operating lever against the release force of the spring member, is intended to provide an input position retaining hooks.

Further, an electromagnet for detaching the cut position holding hook and the entry position holding hook is provided.

[0025]

The switching lever selects whether to perform the opening / closing operation with the first terminal or the opening / closing operation with the third terminal. When the former is selected, the switching lever is held at the switching position by the holding pin, the rotary lever is half-turned to compress and store the spring member by the crank pin, and the rotary lever blocks rotation by the stopper. When the off-position holding hook that holds the operation lever in the off position is removed against the release force of the spring member, the spring member is released and the main shaft is rotated through the operation lever to the insertion position of the first terminal. To do.

Next, the rotary lever is electrically or manually half-turned to pull and store the spring member by the crank pin, and the rotary lever prevents rotation by the stopper. When the insertion position holding hook that holds the operation lever at the insertion position is removed against the releasing force of the spring member, the spring member is released and the main shaft is rotated to the cutting position via the operation lever.

When the latter is selected, the third process is performed in the same manner.
It can be opened and closed with the terminal.

Further, in the case where the tripping electromagnet is provided, the cutting position holding hook and the entry position holding hook are tripped by the electromagnet.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings.

1 and 2 are explanatory views showing an embodiment of the present invention, in which 29 is a rotary lever provided with a crank pin 30 and rotated manually or electrically, 31 is a stopper for holding the rotary lever 29 at a predetermined position, Reference numeral 32 is a pressure contact spring, and 29a is a fitting groove of a stopper 31 provided on the rotary lever 29, which is provided at two positions. Reference numeral 9 is a main shaft, 33 is an operation lever fitted to the main shaft 9, 34 is a pin protruding from the free end of the lever 33, and 35 is a spring member, one end of which is pivotally attached to the pin 34 and the other end of which is It is pivotally attached to the crank pin 30. Reference numeral 36 is a switching lever for selecting whether to perform opening / closing operation with the first terminal or opening / closing operation with the third terminal, 37 is a stop pin, and 38 is a pressure contact spring. 39 is a hook for holding the cut position on the first terminal side, 40
Is a hook for holding the same insertion position, and 41 is a stopper on the first terminal side of the operating lever 33. 42 is a cut-off position holding hook on the side of the third terminal, 43 is the same insertion-position holding hook, 44 is the operating lever 3
3 is a third terminal side stopper.

Next, the operation of the apparatus of this embodiment constructed as described above will be described with reference to FIGS.

FIG. 1A shows a state in which the opening / closing operation with the first terminal is selected. In FIG. 1A, when the cut position holding hook 39 is removed, the operating lever 33 moves together with the main shaft 9 to release the spring member 35. Is rotated in the clockwise direction by the stopper, hits the stopper 41 at the insertion position with the first terminal, and stops.
As described above, it is held at the entry position by the entry position holding hook 40. In this state, the stopper 31 is pulled out, and the rotary lever 29 is half-rotated by manual or electric operation.
As described above, the spring member 35 is pulled by the crank pin 30 and tension-accumulated to prepare for the next operation.

FIG. 2A shows the state of connection with the first terminal,
To turn this off, the entry position holding hook 40 is removed.
The operation lever 33 is rotated counterclockwise together with the main shaft 9 by the urging force of the spring member 35, and the switching lever 36 is turned to the off position.
2B, and is held at the cut position by the cut position holding hook 39 as shown in FIG. And the stopper 31
Is pulled out, and the rotary lever 29 is rotated to perform a half-rotation.
As shown in (A), the spring member 35 is compressed and stored by the crank pin 30 to prepare for the next operation.

When the opening / closing operation with the third terminal is selected, the switching lever 36 is rotated counterclockwise to move the pin 34.
Is engaged with the cut position holding hook 42. Switching lever 36
The selected position of is held by the stop pin 37 held by the press contact spring 38.

To bring the third terminal into the engaged state, the cut position holding hook 42 is removed. The operation lever 33 is rotated counterclockwise together with the main shaft 9 by the urging force of the spring member 35.
At the insertion position with the terminal, it hits the stopper 44 and stops, and is retained at the insertion position by the insertion position holding hook 43. The rotary lever 29 is rotated 180 °, the spring member 35 is tension-stored by the crank pin 30, and is held by the stopper 31.

In order to disconnect the third terminal, the insertion position holding hook 43 is removed. The operating lever 33 is rotated clockwise together with the main shaft 9 by the urging force of the spring member 35, hits the switching lever 36 at the cut position and stops, and is held at the cut position by the cut position holding hook 42. Rotating lever 29 is 1
The spring member 35 is rotated 80 degrees, the spring member 35 is compressed and stored by the crank pin 30, and is held by the stopper 31.

The above description of the operation is given in FIGS. 1 and 2.
The lever 45 shown by the chain double-dashed line is fitted to the main shaft 9 in
If the third terminal is read as a ground terminal by connecting to the link mechanism 8 in FIG. 4, the operation of the disconnector with a grounding device shown in FIG.

FIG. 3 is a view in which electromagnets for disengaging the cut position and entry position holding hooks are provided. Each hook is provided with an arm for operating with the electromagnet, and the cut position holding hook 39 on the first terminal side is provided. Is excited by exciting the electromagnet 46, the insertion position holding hook 40 is excited by the electromagnet 47, the off position holding hook 42 on the third terminal side is exciting the electromagnet 48, and the insertion position holding hook 43 is exciting the electromagnet 49. Be tripped by.

[0039]

The operation mechanism of the switch according to the present invention having the above-described structure is different from the conventional operation mechanism that requires the first and second operation shafts in addition to the main shaft, and is composed of only the main shaft. It is extremely simple, and a lever or link connecting the main shaft and the first and second operation shafts is not required, and the number of parts and the volume of the mounting space are reduced, and the size can be reduced. Also, all design and manufacturing problems due to the large number of levers and links are eliminated.

Even in the case of electrically operating, the first and second methods are conventionally used.
An operating motor is provided for each operating shaft, and a special shaft joint that transmits torque during power storage and slides during power release is required to store the spring member during forward and reverse rotation and release the power during rotation. However, in the case of the present invention, only the electric motor for driving the rotary lever is required and no special shaft joint is required, so that the size can be reduced and the cost can be reduced.

The selection as to whether to connect / disconnect to / from the first terminal or to / from the third terminal can be easily performed by turning the switching lever. Is performed by removing the on / off position holding hooks symmetrically arranged around the line connecting the switching lever and the main shaft, so that both the on / off operation with the first terminal and the on / off operation with the third terminal are performed. The operation is exactly the same, and since it has a simple configuration, there is little possibility of failure.

Further, unlike the conventional one in which the spring member is energized after receiving the opening / closing operation command and the opening / closing operation is performed by its releasing force, the spring member is energized at the same time when the on / off operation is completed. In preparation for the next operation, for example, when the electromagnet 46 is excited and the cut position holding hook 39 is removed in FIG. 3, the operation lever 33 is moved to the insertion position with the first terminal by the urging force of the spring member 35. Since it is held, the time from receiving the opening / closing operation command to completing the opening / closing operation is significantly shortened.

Various remarkable effects such as the above are obtained.

[Brief description of drawings]

FIG. 1A is an explanatory diagram of an embodiment of the present invention. FIG. 1A is a state in which a spring member is in a stored state when an operation lever is in a cut position. FIG. Figure

FIG. 2A is an explanatory diagram of an embodiment of the present invention. FIG. 2A is a state in which a spring member is in a stored state when an operation lever is in a closed position. FIG. Figure

FIG. 3 is an explanatory diagram of an embodiment of the present invention.

FIG. 4 is a block diagram of a disconnector with a grounding device equipped with a conventional operation mechanism.

FIG. 5 is an explanatory diagram of a conventional operating mechanism.

FIG. 6 is an explanatory view of a conventional operating mechanism.

[Explanation of symbols]

 4 ... 1st terminal 5 ... 3rd terminal 6 ... 2nd terminal 7 ... Movable terminal 9 ... Main shaft 29 ... Rotating lever 30 ... Crank pin 31 ... Stopper 33 ... Operation lever 34 ... Pin 35 ... Spring member 36 ... Switching lever 37 ... Holding pins 39, 42 ... Cutting position holding hooks 40, 43 ... In position holding hooks 46 to 49 ... Electromagnets

Claims (2)

[Claims] 1. A first terminal and a third terminal are arranged, and a second terminal is connected to a movable terminal that is inserted (closed) and cut (open) into the first terminal and the third terminal, respectively. , A switch operating mechanism in which the movable terminal is driven by a main shaft of the operating mechanism via a lever, a link, etc., and a rotating lever which is provided with a crank pin and is rotated manually or electrically, and which holds the rotating lever at a predetermined position. One end is pivotally attached to the stopper, the operation lever fitted to the main shaft, and a pin protruding from the free end of the operation lever, and the other end is pivotally attached to the crank pin, and the rotation lever rotates to store the electricity. A biased spring member, a switching lever for selecting the operating direction of the spindle, a holding pin for holding the switching lever in the switching position, and a release position of the spring member at the cutting position and the insertion position in the operating direction of the selected spindle. power A switching position holding hooks for holding the operating lever and anti, switch operating mechanism, characterized by comprising a input position retaining hooks. 2. An operating mechanism for a switch according to claim 1, further comprising an electromagnet for tripping each of the cut position holding hook and the entry position holding hook.