JP3278976B2 - Switch operation mechanism - Google Patents

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, to a switchgear having a function of a disconnecting switch and a grounding device.
The present invention relates to a spring-type operation mechanism for a third-position ground switch that performs operations in three position states, namely, off (open) and grounding with a single operation device.

[0002]

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

The disconnecting switch 1 with a grounding device comprises an operating mechanism 3 installed below a disconnecting switch body 2.

The disconnector body 2 has a first terminal 4 and a second terminal 6.
And a third terminal 5 having a first terminal 4 and a ground terminal (third terminal) 5 at predetermined positions inside thereof, and a second terminal 6 movable to switch between the first terminal 4 and the third terminal 5. Connected to terminal 7.

The movable terminal 7 is moved by a link mechanism 8 linked to the operating mechanism 3 to a cutting position indicated by a solid line in FIG.
A switching operation is performed between a ground position connected to the ground terminal 5 shown by a dashed line and an on position shown by a dashed line.

[0006] This switching operation is performed by the operating mechanism 3 which operates quickly by using the stored energy of the spring in order to minimize damage caused by arcing.

The operation mechanism 3 is configured as shown in FIGS. The operating mechanism 3 includes a main shaft 9 and a first operating shaft 1.
0, and a second operation shaft 11.

The first operation shaft 10 and the second operation shaft 11 have:
Spring levers 12 and 13 are fitted, respectively, and a spring member 14 composed of a compression coil spring is mounted between these two spring levers 12 and 13. That is, one end of the spring member 14 is pivotally attached to the free end of 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.

On the main shaft 9, a main lever 15 formed in an overall frame shape is pivotally mounted. A pin 16 protrudes from the free end of one protruding piece 15 a of the main lever 15.

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

A part of the disconnector link mechanism 8 is pivotally connected to and linked to the free end of the other protruding piece 15b of the main lever 15. In addition, 23, 26, 27, and 28 are stoppers.

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

This device operates by switching the first operating shaft 10 counterclockwise to switch from the off state to the ground state, and by rotating the second operating shaft 11 counterclockwise. The operating direction is designed so that the state changes from the off state to the on state.

First, 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). In accordance with this operation, the spring lever 13 stores energy while accumulating the spring member 14 while rotating counterclockwise.
The second long hole link 21 pivotally connected to the link lever 20 moves to the left as viewed in the figure, but since the pin 16 can move inside the long hole 24, the main lever 15 is stationary. Further, the spring lever 13 is rotated, and the dead center 2
When the number exceeds 2, the stored energy is released to rotate vigorously, and the spring lever 13 hits the stopper 23 and stops. On the other hand, the end of the elongated hole 24 comes into contact with the pin 16 and vigorously rotates the main lever 15 in the clockwise direction to reach the entering 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 performed in a completely opposite manner to the above.

Next, a description will be given of a case where a transition from the off state shown in FIG. 4 to the ground state shown in FIG. In this case,
The first operation shaft 10 is rotated counterclockwise by a manual operation device (not shown) or the like. Then, the spring lever 12 accumulates the spring member 14 while rotating counterclockwise,
The first long link 18 pivotally connected to the first link lever 17 moves rightward in the figure, but the main lever 15 is stationary because the pin 16 can move inside the long hole 19. Further, the spring lever 12 is rotated and the dead center 2
When the value exceeds 5, the stored energy is released to vigorously rotate, and the spring lever 12 hits the stopper 26 and stops. On the other hand, the end of the elongated hole 19 comes into contact with the pin 16 and vigorously rotates the main lever 15 counterclockwise to reach the ground contact position. In conjunction with this operation, the disconnector also shifts from off to ground.

The operation of shifting from the ground state to the off state is performed in a completely opposite manner to that described above.

[0018]

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

Therefore, the angle between the line connecting the main shaft 9 and the first operation shaft 10 and the line connecting the first operation shaft 10 and the second operation shaft 11 is an obtuse angle (about 130 degrees), The distance between the main shaft 9 and the second operation shaft 11 is significantly longer than the distance between the main shaft 9 and the first operation shaft 10. For this reason, the entire length of the second elongated hole link 21 is increased, and there is a problem that the useless space is large and the volume is large as a whole structure, so that the production cost is increased.

Further, the second long hole link 21 is connected to the spring member 1.
Therefore, the first operating shaft 10 and the second operating shaft 11 respectively have a spring lever and a first link lever, or a spring lever and a second link lever.
There was a problem that one lever was required and the number of members increased.

Furthermore, since the operating angle of each lever and link becomes oblique and the number of members that operate vertically or in parallel is small in the entire mechanism, it is difficult to determine the angle of each member in the mechanism design. At the time of assembly, there is a problem that it is difficult to adjust the stroke of a long hole link or the like.

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

[0023]

Means for solving the above-mentioned problems in the present invention is to dispose a first terminal and a third terminal, connect the first terminal and the third terminal, and pivotally connect one end of the second terminal. A movable terminal is disposed, and the movable terminal is operated by a main shaft of the operation mechanism via a lever, a link, or the like. A stopper which is held at a predetermined position, an operation lever which is fitted to the main shaft, and one end pivotally attached to a pin protruding from a free end of the operation lever, and the other end pivotally attached to the crank pin, and A spring member that is charged by the rotation of the lever, a switching lever that selects the operation direction of the main shaft, a pin that holds the switching lever in the switching position, and a cut position in the operation direction of the selected main shaft. 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 tripping the cutting position holding hook and the entering position holding hook is provided.

[0025]

The switching lever is used to select between opening and closing with the first terminal and opening and closing with the third terminal. When the former is selected, the switching lever is held at the switching position by the holding pin, the rotating lever is half-turned, the spring member is compressed and charged by the crank pin, and the rotating lever is prevented from rotating by the stopper. When the cutting position holding hook that holds the operation lever in the cutting position against the release force of the spring member is removed, the spring member is released and the main shaft is rotated to the first terminal insertion position via the operation lever. I do.

Next, the rotary lever is half-turned electrically or manually, and the spring member is pulled and stored by the crank pin, and the rotary lever is prevented from rotating by the stopper. When the on-position holding hook that holds the operation lever in the on position against the urging force of the spring member is released, the spring member is released and the main shaft is rotated to the off position via the operation lever.

In the case where the latter is selected, the third
Opening and closing operations can be performed between terminals.

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

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

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

Next, the operation of the above-described apparatus of the present embodiment 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 cutting position holding hook 39 is removed, the operating lever 33 and the main shaft 9 release the spring force of the spring member 35. 1B, and stops by hitting the stopper 41 at the position where the first terminal is inserted.
Is held at the entry position by the entry position holding hook 40 as shown in FIG. In this state, the stopper 31 is pulled out, and the rotation lever 29 is rotated half a rotation by manual or electric operation.
As shown in the above, the spring member 35 is pulled by the crank pin 30 so as to be stored in tension to prepare for the next operation.

FIG. 2 (A) shows an input state with the first terminal.
To put it in the off state, 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
, And is held at the cutting position by the cutting position holding hook 39 as shown in FIG. And the stopper 31
Is pulled out, and the rotating lever 29 is rotated to perform a half-turn, and FIG.
As shown in (A), the spring member 35 compresses and accumulates by the crank pin 30 and prepares for the next operation.

To select an opening / closing operation with the third terminal, the switching lever 36 is rotated counterclockwise to
Is engaged with the cutting position holding hook 42. Switching lever 36
Is held by the stop pin 37 held by the press-contact spring 38.

To enter the third terminal, the off-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 position where the terminal enters, the stopper hits the stopper 44 and is held at the entry position by the entry position holding hook 43. The rotation lever 29 is rotated by 180 °, and the spring member 35 is pulled and stored by the crank pin 30 and is held by the stopper 31.

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

The above operation will be described with reference to FIGS.
, A lever 45 indicated by a two-dot chain line is fitted to the main shaft 9,
If the third terminal is read as a ground terminal after being connected to the link mechanism 8 in FIG. 4, the operation of the disconnecting switch with the grounding device shown in FIG. 4 will be described.

FIG. 3 is a view showing an electromagnet provided for tripping the respective off-position and on-position holding hooks. Each hook is provided with an arm for operating the electromagnet, and a first-terminal-side off-position holding hook 39 is provided. Is excited by exciting the electromagnet 46, the insertion position holding hook 40 is excited by the electromagnet 47, the cutting position holding hook 42 on the third terminal side is excited by the electromagnet 48, and the insertion position holding hook 43 is excited by the electromagnet 49. Is 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 which requires the first and second operation shafts in addition to the main shaft. It becomes extremely simple, and no lever or link is required to connect the main shaft with the first and second operation shafts. 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 caused by the large number of levers and links are eliminated.

In the case of electric operation, the first and second motors are conventionally used.
An operating motor is provided for each operating shaft, and the spring members are charged each time the motor rotates forward and backward.In order to release the force during rotation, a special shaft joint that transmits torque when storing and slides when releasing is required. However, in the case of the present invention, only the motor for driving the rotary lever is sufficient, and a special shaft joint is not required, so that the size can be reduced and the cost can be reduced.

Whether to switch on / off with the first terminal or on / off with the third terminal can be easily selected by turning the switching lever. Is performed by removing the on / off position holding hooks arranged symmetrically about 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 the configuration is simple, so there is little possibility of failure.

Also, unlike the conventional one in which the spring member is charged after receiving the opening / closing operation command and the opening / closing operation is performed by the releasing force, the spring member is charged at the same time when the on / off operation is completed. In preparation for the next operation, for example, in FIG. 3, when the electromagnet 46 is excited and the cutting position holding hook 39 is released, the operating lever 33 is moved to the position of engagement with the first terminal by the urging force of the spring member 35. Since this is maintained, the time from receiving the opening / closing operation command to completing the opening / closing operation is greatly reduced.

Various remarkable effects can be obtained.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is an explanatory view of one embodiment of the present invention. FIG. 1A is a diagram showing a state of charge of a spring member at a cut position of an operation lever. FIG. Figure

FIGS. 2A and 2B are explanatory views of one embodiment of the present invention. FIG. 2A is a diagram showing the state of energy storage of a spring member when the operation lever is in the on position. FIG. Figure

FIG. 3 is an explanatory view of one embodiment of the present invention.

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

FIG. 5 is an explanatory view of a conventional operation mechanism.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... 1st terminal 5 ... 3rd terminal 6 ... 2nd terminal 7 ... Movable terminal 9 ... Spindle 29 ... Rotating lever 30 ... Crank pin 31 ... Stopper 33 ... Operation lever 34 ... Pin 35 ... Spring member 36 ... Switching lever 37 ... Holding pins 39, 42 ... Off position holding hooks 40, 43 ... On position holding hooks 46-49 ... Electromagnets

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 33/28-33/59 H01H 31/02

Claims (2)

(57) [Claims] A first terminal and a third terminal are arranged, and a second terminal connected to a movable terminal to be turned on (closed) and cut off (open) respectively by the first terminal and the third terminal is provided. An operation mechanism of a switch in which the movable terminal is driven by a main shaft of the operation mechanism via a lever, a link, or the like, wherein the rotation lever includes a crank pin and rotates manually or electrically, and holds the rotation lever at a predetermined position. One end is pivotally connected to a stopper, an operation lever fitted to the main shaft, and a pin protruding from a free end of the operation lever, and the other end is pivotally connected to the crank pin. A biased spring member, a switching lever for selecting an operation direction of the main shaft, a holding pin for holding the switching lever in a switching position, and a release position of the spring member in a cut position and an on position in the selected main shaft operation direction. 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. The switch operating mechanism according to claim 1, further comprising an electromagnet for tripping the cutting position holding hook and the entering position holding hook.