JP3199898B2 - 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 for operating a switch such as a disconnector or a load switch.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional switch operating mechanism for operating a grounding disconnector attached to a metal-closed switchgear. 3, a clip 2 is erected on a conductor 17 indicated by a dashed line at the right end of FIG. 3 provided inside a metal-closed switchgear (not shown), and is fixed to the conductor 17 with bolts 16A. On the right side surface of the ground conductor 18 provided as shown by a chain line below the left side of the clip 2,
The lower terminal 13a of the flexible conductor 13 made of flat braided wire is bolted
It is fixed at 16B.

[0003] Above the left side of the ground conductor 18, an operation shaft 21A of an operation mechanism of the switch is provided in a direction orthogonal to the paper surface, and both ends of the operation shaft 21A are provided on side plates (not shown) of the operation mechanism of the switch. Bearings (not shown)
An operation handle (not shown) is detachably attached to an end of the operation shaft 21A that penetrates one of the bearings.

On the right side of the operating shaft 21A, a lever shaft 21B is provided above the connecting conductor 18 in parallel with the operating shaft 21A, and both ends of the lever shaft 21B are also mounted on the above-mentioned side plates (not shown) via bearings (not shown). Is supported. The operation shaft 21A
Below this, a fixing pin 29 is provided in a direction orthogonal to the paper surface, and both ends of the fixing pin 29 are supported by support brackets (not shown) protruding from the above-mentioned side plates.

[0005] A tubular portion at the right end of the drive lever 22 is inserted into the left operating shaft 21A via a key 21a.
An arcuate cam portion 22a protrudes in a direction perpendicular to the plane of the drawing. On the left end of the drive lever 22, the upper end of the spring guide 27 is a pin 26A.
The spring guide 27 is formed with a substantially inverted U-shaped guide groove 27a whose lower end is open from the intermediate portion to the lower end. The fixing pin 29 described above is loosely fitted to the lower end of the guide groove 27a, and the operation spring 28 is slightly compressed between the fixing pin 29 and the lower surface of the head at the upper end of the spring guide 27. It is loosely fitted.

A tubular portion at the lower end of the driven lever 23 is inserted into the operating shaft 21A adjacent to the driving lever 22. A semicircular cam portion 23a is protruded from the tubular portion in a direction perpendicular to the plane of the drawing. The upper left surface of the cam portion 23a contacts the upper right surface of the cam portion 22a of the drive lever 22, and the operation spring 28 It is pressed by the restoring force.

A tubular portion 24a at the lower end of the drive lever 24 is inserted into the right lever shaft 21B. This driven lever 24
Is connected to the upper end of the connecting link 25 via a pin 26C, and the left end of the connecting link 25 is connected to a pin 26B.
Is connected to the upper end of the driven lever 23 via the

The left end of the blade 1 is fixed to the right side surface of the tubular portion 24a at the lower end of the driven lever 24. The right end of the blade 1 is inserted into the clip 2 from above. An upper terminal 13b of the flexible conductor 13 is fixed to the left end of the blade 1 with a bolt (not shown). As a result, the conductor 17 is grounded via the clip 2, the blade 1 and the flexible conductor 13 and the ground conductor 18. I have.

In the switch operating mechanism configured as described above, when the blade 1 in the closed state shown in FIG. 3 is opened, the operating handle attached to one end of the operating shaft 21A is turned in FIG. Turn clockwise. Then, the drive lever 22 inserted into the operation shaft 21A via the key 22a also swings counterclockwise as shown by the arrow G1, and the spring guide connected to the tip of the drive lever 22 via the pin 26A.
27 is driven downward as indicated by arrow F. As a result, the operation spring 28 loosely fitted to the spring guide 27 is compressed. The operation handle is further rotated, and the drive lever 22 is
When rotated 90 ° to be vertical, the cam of the drive lever 22
The end face 22b of the cam portion 23a of the driven lever 23
, And the operation spring 28 is in the most compressed state.

When the operation handle is further turned counterclockwise,
The end face 23b is pressed by the end face 22b, and the driven lever 23
Is driven in the counterclockwise direction as indicated by an arrow G2, and is urged by the return force of the operation spring 28 to swing from the above-described vertical state to the right side of the operation shaft 21A.
As shown in FIG. 4, the driven lever 23 stops in a substantially horizontal state, and the driven lever 23 swings counterclockwise by about 90 ° and stops.

By the swing of the driven lever 23, a link connected to the tip of the driven lever 23 via a pin 26B.
3 is driven leftward as indicated by an arrow H in FIG. 3, and a driven lever 24 connected to the right end of the link 25 via a pin 26C is driven counterclockwise as indicated by an arrow J in FIG. Is done.

By driving the driven lever 24 in the counterclockwise direction, the blade 1 whose base end is fixed to the right end of the boss portion 24a of the driven lever 24 moves counterclockwise as shown by an arrow K in FIG. It swings and is opened from the clip 2 as shown by the arrow M in FIG.

Conversely, when the open blade 1 shown in FIG. 4 is inserted into the clip 2 and the conductor 17 connected to the clip 2 is grounded, the operating handle (not shown) inserted into the operating shaft 21A is used. Turn clockwise in FIG.

Then, the drive lever 22 inserted into the operation shaft 21A via the key 22a also swings clockwise as shown by the arrow N in FIG. 4, and is connected to the tip of the drive lever 22 via the pin 26A. The upper end of the spring guide 27 is driven downward as indicated by the arrow P. As a result, the operation spring 28 mounted on the spring guide 27 is compressed, and the drive lever 22 is turned about 90 °.
When the pin 26A rotates and swings on a line connecting the operating shaft 21A and the fixed pin 29, the pin 26A becomes the shortest and the cam portion 22a
Is in contact with the left end surface of the cam portion 23a.

When the operating handle is further turned, the return force of the operating spring 28 causes the upper end of the spring guide 27 and the spring guide 27 to move.
The tip of the drive lever 22 connected to the pin 27A via the pin 26A is driven to the left in FIG. 3 from below the operation shaft 21A, and the left end of the cam portion 22a of the drive lever 22 is connected to the left To stop in a substantially horizontal state as shown in FIG.

The driven lever 23 drives the driven lever 23 so that the driven lever 22 swings on a line connecting the fixed pin 29 and the operating shaft 21A, and the end face 22 of the cam portion 22a of the driven lever 22 is moved.
From the point in time when b swings on the line connecting the operating shaft 21A and the fixing pin 29, the end face 22b is pressed against the end face opposite to the end face 23b of the cam portion 23a, and clockwise as shown by the arrow L2 in FIG. Rocks.

By the swing of the driven lever 23, a link connected to the tip of the driven lever 23 via a pin 26B.
The driven lever 24 connected to the right end of the link 25 via a pin 26C is driven clockwise as indicated by an arrow R in FIG. You.

When the driven lever 24 is driven clockwise, the blade 1 whose base end is fixed to the right end of the boss 24a of the driven lever 24 swings clockwise as shown by an arrow R in FIG. Then, as shown in FIG.

FIG. 5 shows that the operating mechanism of the switch when the blade 1 is in the open state as shown in FIG. It is a graph which shows the relationship of a moment.

As shown in FIG. 5, the drive torque 31A applied to the drive lever 22 rises and attenuates substantially in a sinusoidal curve. On the other hand, the load moment 32A is applied to the drive lever 22 after the drive torque 31A has been attenuated to about half.

FIG. 6 is a graph showing the relationship between the rotation angle of the drive lever 22 and the drive torque and load moment when the blade 1 in the closed state of FIG. 4 is opened to reach FIG. Also in FIG. 6, the drive torque 31B applied to the drive bar 22 rises and attenuates substantially in a sinusoidal curve.
The load moment is applied at the point of low initial drive torque of the sinusoid.

[0022]

However, in such a switch operating mechanism showing the relationship between the rotation angle of the operating lever 22, the driving torque and the load torque, the opening moment and the opening Since the initial drive torque is reduced, the maximum value of the drive torque is increased.

Then, in order to withstand the load, not only the wire diameter of the coil spring 28 must be increased and the outer diameter must also be increased, but also the required operating force of the operating handle increases, and the compression force of the coil spring 28 and the return force In order to withstand the impact of time, the link mechanism must also be strengthened. Then, the load moment also increases, and there is a disadvantage that the effect is reversed.

As a result, the outer shape of the operating mechanism of the switch increases, and the outer shapes of the load switch and the switch gear in which the operating mechanism of the switch is housed also increase. Therefore, an object of the present invention is to
An object of the present invention is to provide a switch operating mechanism that is easy to operate, has a small external shape, and can extend its life.

[0025]

According to one aspect of the present invention, there is provided a drive plate inserted into an operation shaft.
In switch operating mechanism approaching and moving away from the clip and blade from the oscillating of said arc-shaped groove centered on the operating shaft to the drive plate is formed, provided the pin for swinging the groove, An operating spring is locked to this pin and a fixed pin provided below the operating shaft, one side of the driving plate is opposed to a positioning pin, and one side is connected to the other side of the driving plate, and the blade is rocked on the other side. A moving lever is provided, and even if an overcurrent flows while the blade is inserted into the clip, the operation of the drive plate in the opening direction is prevented by the positioning pin.

[0026] The invention according to claim 2 is based on the opening of claim 1.
In operation mechanism of閉器, the operation spring thus being moved to the swinging direction of the drive plate.

[0027]

According to the first aspect of the present invention, the electromagnetic force generated by the overcurrent flowing between the blade and the clip is:
The rocking operation of the drive plate caused by the electromagnetic force transmitted to the lever and transmitted from the lever to the other side of the drive plate is prevented by the stopper disposed on one side of the drive plate.

According to the second aspect of the present invention,
The swinging operation of the drive plate caused by the electromagnetic force generated by the overcurrent flowing between the blade and the clip and transmitted to the other side of the drive plate is prevented by the operation spring having one side locked to one side of the drive plate.

[0029]

FIG. 1 is a view showing an operating mechanism of a switch according to the present invention, and is a view corresponding to FIG. 3 shown in the prior art, and FIG. 2 is a blade of the operating mechanism of the switch shown in FIG. FIG. 5 is a view showing a state in which the electrode 1 is opened and corresponding to FIG. 4. The same parts as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, an operation shaft 14A provided on the left side in a direction orthogonal to the paper surface is supported at both ends by side plates (not shown) via bearings. The lower ends of a pair of substantially fan-shaped drive plates 6 are inserted into the operation shaft 14A via keys (not shown). The drive plate 6 has an arc-shaped groove 6a formed at the upper portion thereof with the axis of the operation shaft 14A as a center.

A positioning pin 11 is provided on the left side of the operation shaft 14A, and the lower surface of the drive plate 6 is in contact with the upper surface of the positioning pin 11. On the right side of the operation shaft 14A, a positioning pin 12 is provided slightly below the position symmetrical to the positioning pin 11. A spring fixing pin 10 is provided below the operation shaft 14A. The lower end of the operation spring 7 is locked to the spring fixing pin 10, and the upper end of the operation spring 7 is fitted to the left end of the groove 6a. It is locked by a spring hook pin 8.

A lever shaft 14B is provided on the upper right side of the operation shaft 14A.
Are provided in the direction perpendicular to the paper surface, and both ends are supported by bearings of side plates (not shown). A lever shaft 14C is also provided on the right side of the lever shaft 14B in a direction orthogonal to the paper surface, and is supported by a side plate (not shown) via a bearing (not shown).

The left lever shaft 14B has a substantially L
An intermediate portion of the lever 4 is inserted into the lever 4, and the end of one side 4 a of the lever 4 is connected to a strip-shaped link 5 via a pin 15 </ b> B.
Is connected to the right end of the driving plate 6 via a pin 15A. An extension (not shown) extending to the lower left from the center of the pins 15A and 15B is assembled to pass slightly to the left of the axis of the operation shaft 14A. The left end of the band-shaped link 3 is connected to the tip of the other side 4b of the lever 4 via a pin 15C.

A boss 9a of the lever 9 is inserted into the right lever shaft 14C, and a lower end of the lever 9 is provided with a pin 15D.
The right end of the link 3 is connected via the. On the right side of the upper end of the lever 9, the left end of the blade 1 whose tip is inserted into the clip 2 from above is fixed in the same manner as in the related art.
An upper end of a flexible conductor 13 is fixed to a base end of the blade 1 with a bolt (not shown), and a lower terminal 13a at a lower end of the flexible conductor 13 is disposed on a metal-closed switchgear together with an operation mechanism of the switch. It is fixed to the ground conductor 18 provided with bolts 16B.

In the operation mechanism of the switch constructed as described above, when the blade 1 in the closed state shown in FIG. 1 is opened as shown in FIG. The mounted operation handle is turned clockwise in FIG. Then, the drive plate 6 inserted into the operation shaft 14A via a key (not shown) also swings clockwise as shown by the arrow A2, and is loosely fitted into the left end of the groove 6a formed on the upper portion of the drive plate 6. The spring hook pin 8 is also driven to the upper right as shown by the arrow A1. As a result, the operation spring 7 whose upper end is locked to the spring hook pin 8 is pulled, and the spring hook pin 8
Is the longest when it moves by an angle α1 to the extension of the line connecting the operating shaft 14A and the fixed pin 10.

When the operating handle is further turned, the lower surface on the right side of the driving plate 6 driven by the returning force of the operating spring 7 comes into contact with the upper surface of the positioning pin 12, and as shown in FIG.
Swings by an angle α2 slightly larger than the angle α1 shown in FIG. 1, and the pin 15A stops in a state substantially horizontal to the operation shaft 14A.

As a result, the distance L2 between the spring hook pin 8 and the fixed pin 10 is smaller than the distance L1 between the spring hook pin 8 and the fixed pin 10 in FIG.

The drive of the drive plate 6 also drives the link 5, and the drive of the link 5 causes the one side 4 a of the lever 4 to swing counterclockwise. Then, the other side 4b of the lever 4 also swings counterclockwise, and drives the link 3 rightward as shown by the arrow D in FIG.

By driving the link 3 rightward,
The lever 9 connected to the right end of the link 3 via the pin 15D is driven to the right, and the blade 1 whose base end is fixed to the right end of the boss 9a of the lever 9 is as shown by an arrow E in FIG. 2 and is opened from the clip 2 as shown in FIG.

Conversely, when the open blade 1 shown in FIG. 2 is inserted into the clip 2 and the conductor 17 connected to the clip 2 is grounded, the operating handle (not shown) inserted into the operating shaft 14A is used. Turn counterclockwise in FIG.

Then, the drive plate 6 inserted into the operation shaft 14A via a key (not shown) also swings counterclockwise, and the spring hook pin 8 at the right end of the groove 6a of the drive plate 6 is also indicated by an arrow C. Is driven to the left. As a result, the operation spring 7 whose upper end is locked to the spring hook pin 8 is pulled, and the spring hook pin 8 reaches the angle α on the line connecting the operating shaft 14A and the fixed pin 10.
It becomes the longest when it swings by two.

When the operating handle is further turned, the driving plate 6 is driven in a counterclockwise direction together with the spring hook pin 8 by the return force of the operating spring 7, and the lower left surface of the driving plate 6 is positioned by the positioning pin.
11 and stops while swinging by the angle α1 shown in FIG.

By driving the driving plate 6, the link 5
Is driven upward, and one side 4a of the lever 4 swings clockwise. Then, the other side 4b of the lever 4 also swings clockwise, driving the link 3 leftward in FIG.

By driving the link 3, the lever 9 connected to the right end of the link 3 via the pin 15D is driven to the left, and the blade 1 whose base end is fixed to the right end of the boss 9a of the lever 9 Swings clockwise and is put into the clip 2 as shown in FIG.

In the switch operating mechanism thus constructed, in FIG. 1, an overcurrent flowing from the clip 2 through the blade 1 to the ground conductor 18 via the blade 1 causes the blade 1 to turn to the arrow E as shown in FIG. When the electromagnetic force acts in the counterclockwise direction shown in the figure, the counterclockwise driving force acting on the lever 9 and the lever 4 with the counterclockwise driving force of the blade 1 also causes the driving plate 6 to rotate counterclockwise. Work on. However, the driving force on the driving plate 6 in the counterclockwise direction is
And the link 5 and the pin 15A are transmitted to the drive plate 6, but an extension of a line connecting the pin 15A and the pin 15B passes through the left side of the operation shaft 14A in FIG. Since the driving force is applied to the positioning pin 11, the counterclockwise swing of the driving plate 6 is prevented by the positioning pin 11. Therefore, since the swing of the blade 1 in the counterclockwise direction is prevented regardless of the return force of the operation spring 7, the outer shape of the operation spring 7 is increased without increasing the strength.
The overcurrent strength of the fitting portion between the blade 1 and the clip 2 can be increased.

The load torque at the beginning of the opening operation is only the force required to extend the operating spring 7, and the amount of change in the length of the operating spring 7 at this time is the same as that of the operating spring 28 shown in FIG. Since the return force of the operating spring 7 is added in the initial stage of starting the blade 1, the opening operation becomes easy. Similarly, at the end of the closing operation, since the amount of change in the length of the operation spring 7 is small, a decrease in the return force can be suppressed, and the throwing force by the operation spring 7 can be increased, thereby facilitating the closing operation. .

Further, in FIGS. 1 and 2, L1> L2
By doing so, the load torque at the time of opening is increased, so that the required torque at the start of opening can be increased, and the overcurrent intensity can be increased.

Note that depending on the load switch to which this switch operating mechanism is applied and the insulation class of the switchgear, etc.
The right lever shaft 14C is omitted, and the blade 1 is connected to the lever shaft 14C.
The outer shape may be reduced by fixing to B and omitting the link 3.

Further, in the above embodiment, the operation spring 7 for urging the drive plate 6 has been described as an example.
A fixed pin is provided on a line extending upward from a line connecting the fixed pin 10 and the operation shaft 14A, the upper end of the compression coil spring is supported by the fixed pin, and the spring hook pin 8 is pressed by the lower end. You may.

[0050]

As described above , according to the present invention ,
The electromagnetic force generated by the overcurrent flowing between the blade and the clip is transmitted to the lever, and the oscillating motion of the drive plate by the electromagnetic force transmitted from this lever to the other side of the drive plate is positioned on one side of the drive plate. Because it was blocked by the pin ,
It is possible to provide a switch operating mechanism that is easy to operate, has a small external shape, and can extend its life.

[0051]

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing an embodiment of a switch operating mechanism according to the present invention.

FIG. 2 is a partial longitudinal sectional view showing the operation of the switch operating mechanism of the present invention.

FIG. 3 is a partial longitudinal sectional view showing an example of a conventional switch operating mechanism.

FIG. 4 is a partial longitudinal sectional view showing the operation of a conventional switch operating mechanism.

FIG. 5 is a graph showing the operation of a conventional switch operating mechanism.

FIG. 6 is a graph different from FIG. 5 showing the operation of the conventional switch operating mechanism.

[Explanation of symbols]

1 ... Blade, 2 ... Clip, 3,5 ... Link, 4,9
... Lever, 6 ... Drive plate, 7 ... Operation spring, 8 ... Spring hook pin, 10 ... Fixing pin, 11,12 ... Positioning pin, 13 ... Flexible conductor, 14A ... Operation shaft, 14B, 14C ... Lever shaft, 15A , 15
B, 15C, 15D: pin, 16A, 16B: bolt, 17: conductor, 18: ground conductor.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tadashi Nonoshita 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu factory, Toshiba Corporation (56) References Japanese Utility Model Sho 58-62526 (JP, U) Japanese Patent Publication Sho 45- 40618 (JP, B1) Jiko 46-35212 (JP, Y1) Jiko 57-1380 (JP, Y2) Jiko 33-12428 (JP, Y1) Jiko 45-11129 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01H 31/28 H01H 33/42

Claims (2)

(57) [Claims] 1. A switch operating mechanism approaching and moving away from the from the oscillating drive plate that is inserted into the operating shaft <br/> clip and blade, wherein the drive plate circle centered on the operating shaft An arc-shaped groove is formed, a pin that swings in the groove is provided, an operation spring is locked to a fixed pin provided below the pin and the operation shaft, and one side of the driving plate is opposed to a positioning pin, A lever connected to the other side of the driving plate and swinging the blade at the other side, and the opening of the driving plate in the opening direction even if an overcurrent flows while the blade is being inserted into the clip; The switch is operated by the positioning pin. 2. The operating mechanism for a switch according to claim 1, wherein said operating spring moves in a swinging direction of said drive plate.