JPH06290686A - Operation mechanism for switch - Google Patents

Abstract

PURPOSE:To make a structure simple, make it possible to make the device small in size, and thereby facilitate manufacture by letting selection be made by a change-over lever between a first terminal and a third terminal. CONSTITUTION:When a disconnect position hold hook 39 is uncoupled by an electric magnet 41 in a state that switching operation with a first terminal is selected, an operation lever 33 is rotated clockwise together with a main shaft 9 by the energy releasing force of a spring member 35, it is hit against a stopper 43 at a connect position with the first terminal so as to be stopped, so that it is held at the connect position by a connect position hold hook 40. A screw shaft 32 is then pulled upward, so that energy is accumulated in the spring member 35. When the switching operation with a third terminal is selected. the lever 36 is rotated counterclockwise, and a pin 34 is thereby engaged with a disconnect position hold hook 44. The selected position of the lever 36 is held by a stop pin 37 pressed with pressure by a pressure contact spring 38. In order to make a connect condition with the third terminal, the hook 44 is uncoupled by an electric magnet 46. The lever 33 is held at a connect position by a hook 45.

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 switch that operates 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 so-called three-position switch spring type operation mechanism (hereinafter simply referred to as an operation mechanism) performed by the operation device, there is an operation mechanism illustrated in FIGS. 3 to 5. This operating mechanism is attached to 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. 4 and 5. 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 a hook shape 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 elongated hole link 18 is pivotally attached to the free end portion of the first link lever 17 fitted on the first operating shaft 10, and the tip end portion of the first elongated hole link 18 is attached. The pin 16 is movably inserted into the long hole 19 provided. Along with this, the root end of the second elongated hole link 21 is pivotally attached to the free end of the second link lever 20 fitted to the second operation shaft 11,
The pin 16 is inserted into the slot 24 provided at the tip of the slot link 21.
The main lever 15 is interlocked by movably inserting.

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. 3 to the ON state shown in FIG. 4, 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, the case where the off state shown in FIG. 3 is changed to the grounded state shown in FIG. 5 will be described. 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 slanted, 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 mechanical design, and assembly is also difficult. In this case, 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 the operating mechanism of the switch, in which a movable terminal is arranged, and the movable terminal is driven by the main shaft of the operating mechanism via a lever, a link, etc., a screw shaft that is vertically moved manually or electrically is fitted to the main shaft. A spring member, one end of which is pivotally attached to the operating lever and a pin protruding from the free end of the operating lever, the other end of which is pivotally attached to the lower end of the screw shaft, and which is stored and released by vertical movement of the screw shaft. 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 cutting position and an inserting position in the operating direction of the selected spindle against the urging force of the spring member. Hold the operating lever A switching position holding hooks are those providing the input position retaining hooks, and an electromagnet for tripping the respective hook.

[0024]

The switching lever selects whether the opening / closing operation is performed with the first terminal or the opening / closing operation is performed with the third terminal. When the former is selected, the switching lever is held at the switching position by the holding pin and the screw shaft is moved downward to store the spring member. When the cut position holding hook that held the lever at the cut position against the spring force of the spring member is pulled out by the electromagnet, the spring member releases the force and the main shaft reaches the first terminal input position via the operating lever. Rotate. Next, the screw shaft is moved upward to store energy in the spring member. When the insertion position holding hook that holds the operation lever at the insertion position is pulled out by the electromagnet against the urging force of the spring member, the spring member releases the force and the main shaft rotates to the cut position via the operation lever. . When the latter is selected, the opening / closing operation with the third terminal can be performed in the same manner.

[0025]

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 invention. In FIG. 1 (A), 29 is an output shaft having a small bevel gear 3.
An operating motor fitted with 0, 31 is a bevel gear with a female screw that is driven by a small bevel gear 30, and vertically moves a screw shaft 32,
9 is a main shaft, 33 is an operating 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 pivotally attached to the lower end of the screw shaft 32. 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 cut-off position holding hook on the side of the first terminal, 40 is the same insertion-position holding hook, 4
1, 42 are electromagnets for removing the hooks 39, 40,
43 is a stopper on the first terminal side of the operating lever 33. Four
Reference numeral 4 denotes a cut-off position holding hook on the third terminal side, 45 denotes the same insertion-position holding hook, 46 and 47 denote electromagnets for removing the hooks 44 and 45, and 48 denotes a third terminal side stopper of the operating lever 33.

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

FIG. 1 (A) shows a state in which the opening / closing operation with the first terminal is selected, and in this figure, when the cut position holding hook 39 is removed by the electromagnet 41, the operation lever 33 moves together with the main shaft 9 of the spring member 35. It is rotated clockwise by the urging force, hits the stopper 43 at the insertion position with the first terminal and stops, and is held at the insertion position by the insertion position holding hook 40 as shown in FIG. 1B. Then, the screw shaft 32 is pulled up, and the spring member 35 is charged to prepare for the next operation as shown in FIG.

FIG. 2A shows the state of connection with the first terminal,
To turn it off, the entry position holding hook 40 is removed by the electromagnet 42. The operating lever 33 is rotated counterclockwise together with the main shaft 9 by the releasing 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 39 as shown in FIG. 2B. It
Then, the screw shaft 32 is moved downward to store the spring member 35 as shown in FIG.

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 44. Switching lever 36
The selected position of (1) is held by the stop pin 37 which is pressed by the pressing spring 38.

In order to bring the third terminal into the on-state, the cut position holding hook 44 is removed by the electromagnet 46. The operation lever 33 is rotated in the counterclockwise direction together with the main shaft 9 by the urging force of the spring member 35, hits the stopper 48 at the insertion position with the third terminal and stops, and is held at the insertion position by the insertion position holding hook 45. The screw shaft 32 is moved upward to store the spring member 35.

To turn off the third terminal, the insertion position holding hook 45 is removed. The operation 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 44. The screw shaft 32 is moved downward to store the spring member 35.

The above description of the operation is given in FIGS. 1 and 2.
The lever 49 shown by the chain double-dashed line is fitted to the main shaft 9 in
If the third terminal is replaced with the ground terminal by connecting to the link mechanism 8 in FIG. 3, the operation of the disconnector with a grounding device shown in FIG. 3 will be explained as it is.

[0034]

The operating mechanism of the switch according to the present invention having the above-described structure is different from the conventional operating mechanism that requires the first and second operating shafts in addition to the main shaft, and has only the main shaft. It is extremely simple, and a lever or link for 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.

Also in the case of electric operation, conventionally, an operating electric motor is provided on each of the first and second operating shafts to store the spring member in each of the forward and reverse directions and to release the spring member during the rotation. However, a special shaft joint that transmits torque during power storage and slips during power release is required, but in the case of the present invention, only the power storage motor for the spring member is necessary, and a special shaft mounting hand is not required, so it is small. It is possible to reduce the cost as well as the cost.

It is possible to easily select whether to insert / disconnect with the first terminal or with the third terminal by rotating 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 operating mechanism for energizing and deactivating the spring member, the spring member is energized in advance and the hook is removed by the electromagnet to perform the energizing / disengaging operation. It is possible to significantly shorten the operation time from receiving the switch closing or opening operation signal to completing the on / off operation.

The present invention has various practical effects such as the above.

[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 operating lever is in a cut position, and FIG. 1B is a state in which a spring member is in a released state in which the operating lever is in an inserted position. 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, and FIG. 2B is a state in which a spring member is in a released state when the operation lever is in a cut position. Figure

FIG. 3 is a configuration diagram of a disconnector with a grounding device equipped with a conventional operation mechanism.

FIG. 4 is an explanatory view of a conventional operating mechanism.

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

[Explanation of symbols]

 7 ... Movable terminal 9 ... Main shaft 32 ... Screw shaft 33 ... Operating lever 34 ... Pin 35 ... Spring member 36 ... Switching lever 37 ... Holding pin 39, 44 ... Cut position holding hook 40.45 ... In position holding hook 41, 42, 46, 47 ... Hook tripping electromagnet

Claims (1)

[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. In a switch operating mechanism in which the movable terminal is driven by a main shaft of an operating mechanism via a lever, a link, etc., a screw shaft that is manually or electrically moved up and down, an operation lever fitted to the main shaft, and the operation One end is pivotally attached to a pin protruding from the free end of the lever, the other end is pivotally attached to the lower end of the screw shaft, and a spring member is stored and released by the vertical movement of the screw shaft, and an operation of the main shaft. A switching lever for selecting a direction, a holding pin for holding the switching lever at a switching position, and a holding pin for holding the operating lever against the urging force of the spring member at the cutting position and the insertion position in the operating direction of the selected main shaft. Cut position holding hook and entry position holding Click and, switch operating mechanism, characterized in that it comprises an electromagnet which tripping the respective hook.