JPS6260777B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a switch operating mechanism.

FIG. 1 shows an example of the configuration of an opening/closing part of a switch that is opened and closed by a switch operating mechanism according to the present invention.

In FIG. 1, 1 is a vacuum switch tube,
A lead is connected to the outside of the fixed electrode and the movable electrode, respectively. 2 is a movable stud, 3
is an insulation mold, 4 is a wipe spring, 5 is a lever,
Reference numeral 5a is a shaft, and the main shaft is controlled through various functions such as adjustment of mounting dimensions by the movable stud 2, electrical insulation by the insulating mold 3, contact pressure by the wipe spring 4, and converting rotational motion into linear motion by the lever 5. The movement in the rotational direction at 6 moves the movable electrode to open and close the vacuum switch tube 1. The main shaft 6 is rotatably supported in the housing 10 by a main shaft pin 0610. Further, the main shaft 6 is provided with a crank 7 and a crank pin 12 at its tip.
By moving the crank pin 12, the main shaft 6 is moved in the rotational direction via the crank 7, and the vacuum switch pipe 1 is opened and closed.

Note that the crank window 1012 is connected to the crank pin 12.
has the required width to allow the movement necessary to open and close the vacuum switch tube 1.

Since the switch is configured as described above, the switch can be opened and closed by driving the crank pin 12 in the required direction for the required stroke. However, when opening and closing the switch, generally an arc is generated at the contact part when closing and closing the switch. Therefore, the opening/closing operation of the switch contact must be performed at a constant speed, regardless of whether the operator performs a closing or closing operation. Also, in case of an emergency,
Since a trip function is also required that allows cutting to be performed at a constant speed regardless of manual operation, the crank pin 12 is not normally operated manually, but instead is operated manually. The crank pin 12 is driven by converting the force into a closing/disengaging operation force at a constant speed, and is also driven via an operating mechanism section that can perform a trip operation if necessary.

The present invention relates to a structure of an operating mechanism that satisfies the above-mentioned requirements, and provides a circuit breaker operating mechanism that has a simple structure and has the above-mentioned quick closing and shutting and trip functions.

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 2, 3, and 4 are diagrams showing a switch operating mechanism that is a part of the device according to the embodiment of the present invention,
Regarding the opening/closing operation, FIG. 2 shows the closed state, FIG. 3 shows the closed state, and FIG. 4 shows the state in the process from shutting off to closing. In FIG. 2, reference numeral 11 denotes an operating lever, one end of which is rotatably connected to the crank pin 12, and a spring 13 is applied to a pin 1112 provided near the center of the lever, urging it upward in the drawing. . 14 is a spring, which is hung on a connecting pin 1121 provided at an intermediate position between the crank pin 12 and the pin 1112 on the operating rod 11;
3 is auxiliary energized. Further, the other end of the operating rod 11 hits a stopper fixedly provided on the housing 10, so as to limit the range of movement in the upper direction in the drawing.

21 is a latch arm, one end of which is the operating rod 11
is rotatably connected to the connecting pin 1121. Reference numeral 22 denotes a fan-shaped lever, one end of which is rotatably attached to a rotating shaft 1022 fixed to the housing, and rotatably connected to the latch arm 21 by a connecting pin 2122. 23 is rotatably attached to a rotating shaft 1023 fixed to the housing 10 by an L-shaped latch, so that a roller 2223 provided on the L-shaped latch 23 can slidably engage with a shoulder 2201 of the fan-shaped lever 22. It's getting old. Reference numeral 24 denotes a tri-platz, which is rotatably attached to a rotating shaft 1024 fixed to the housing 10 and has a notch 240 therein.
1 is a roller 2324 provided on the L-shaped latch 23
It is slidably engaged.

Reference numeral 31 denotes a charging arm, one end of which is rotatably connected to the operating rod 11 by a connecting pin 1131. Reference numeral 32 denotes a loading link, one end of which is rotatably connected to the loading arm 31 by a connecting pin 3132. 33 is a closing lever, one end of which is rotatably connected to the closing link 32 by a connecting pin 3233, and the other end is connected to a handle shaft 34 that applies an operating force from the outside, and is connected to the housing 10.
It is rotatably held by a bearing 3334.

Note that the spring 14 is provided to assist the spring 13 in the event of shearing, and thereby the size of the spring 13 can be reduced.

35 is an auxiliary link, connecting pin 1 to operating rod 11
They are rotatably connected via 131. 36 is an auxiliary lever and a connecting pin 3536 is connected to the auxiliary ring 35.
The other end is rotatably connected to a connecting pin 3638 provided on the stop lever 38 that abuts against the stopper 41. Also, 40 is an auxiliary spring, one end of which is attached to the housing 1.
0, and the other end is fixed to the auxiliary lever 36, and operates to push the auxiliary lever 36. FIG. 3 shows the same switch operating mechanism as FIG. 2 in a closed state. FIG. 4 similarly shows a state in which the springs 13 and 14 are loaded before entering the closing state. At this time, the releasing force of the auxiliary spring 40 acts to push down the operating rod 11 via the auxiliary link 35, and as a result acts in a direction against the spring 13. There is.

FIG. 5 is an exploded perspective view of a handle shaft operating mechanism for operating the handle shaft 34 of the operating opening portion of the switch. The handle shaft operating mechanism section is roughly divided into a closing mechanism that rotates and closes the handle shaft 34, and a lock holding mechanism that locks and holds the handle shaft 34 in the closed state.

Figures 6 and 7 are of the above-mentioned loading mechanism, Figure 8,
FIG. 9 is an explanatory view showing the different operating states of the lock holding mechanism.

First, the closing mechanism of the handle shaft operating mechanism will be explained. In FIG. 5, FIG. 6, and FIG. 7, 34 is a handle shaft;
This is the handle shaft itself shown in FIG. This handle shaft 34 is rotatably supported by the housing 101a via a bearing 102. Reference numeral 103 denotes an input cam fixed to the handle shaft 34, and has a manual handle insertion portion 103a. Reference numeral 104 denotes a charging gear that connects the plate 104a at a predetermined interval.
These are the housing 101a and the housing 101.
It is rotatably supported between the parts b. 105 is between the input gear 104 and the plate 104a,
The input roller is rotatably supported via a pin 105a, and is arranged so as to engage the input cam 103 when the input gear 104 rotates. 1
06 is driven by the motor M, and the input gear 1
04 is a driving gear, 107 is the motor M
A lever for operating a limit switch for driving or stopping the input gear 104, which is operated by a protruding portion of the pin 105a fixed to a plate 104a integrally provided with the input gear 104. One end 107a of this limit switch operating lever 107 is configured to operate the limit switch 108.
The other end is rotatably supported by the housing 101b by a pin 107b. The operating lever 107 is always biased clockwise around the pin 107b via the end 107a by a spring built into the limit switch 108. Further, the lever 107 has a pin 105a.
It has an engaging part 107c that can be engaged with the protrusion of the housing 101b, and a bent part 107d that can be engaged with the housing 101b for positioning in the clockwise direction.

The housing 101b accommodates and supports each component of the input mechanism and is fixed to the housing 101a.

Next, the lock holding mechanism will be explained.

In FIG. 5, FIG. 8, and FIG. 9, reference numeral 121 is a substantially Z-shaped lock lever, which is rotatably supported by a shaft 122 on the housing 101c. This lock lever 121 has one end locked to the housing 101c, and the other end to a twist spring 123 locked to a pin 121a fixedly installed on the lock lever 121.
As a result, it is constantly biased clockwise around the shaft 122. Moreover, the lock lever 121 is
Arm portion 12 for engaging the shaft 5a shown in FIG.
1b. 129 is the handle shaft 34
A lock cam is fixedly disposed in a predetermined positional relationship to the lock lever 121, and is provided so as to be able to engage with the lock lever 121, and has one end locked to the housing 101c and the other end locked to the lock cam 129. A spring 130 constantly biases the bearing 102 in a clockwise direction. The casing 101c stores and supports each component of the lock holding mechanism.
It is fixed to 01b.

Next, the operation will be explained.

When the contact of the vacuum switch is closed, the switch operating mechanism is as shown in FIG. ga tritu platsu 2
Since the roller 2223 is engaged with and suppressed by the notch 2401 of the fan-shaped lever 22, the roller 2223
I'm holding down 1. As a result, since the line connecting the connecting pin 1121 and the connecting pin 2122 is on the left side of the rotation axis 1022 in the drawing, the operating rod 11 is
Although a force is applied to rotate the fan-shaped lever 22 clockwise, the engagement between the roller 2223 and the shoulder 2201 keeps it locked in the state shown in FIG.

On the other hand, in this contact closed state, the closing mechanism of the handle shaft operating mechanism is in the state shown by the dashed line in FIG. 6, and the lock holding mechanism is in the state shown in FIG. 8.

That is, in the charging mechanism shown in FIG.
It rotates counterclockwise around the handle shaft 34 via the pin 105a and the closing roller 105, and the contact closing is completed at the solid line position, but the closing gear 10
4 continues to rotate, and the limit switch 108 is operated via the protrusion of the pin 105a and the lever 107, and stops at the position indicated by the dashed line, thus completing the operation of the closing mechanism. Further, in the lock holding mechanism shown in FIG. 8, the lock cam 129 fixed to the handle shaft 34 completes contact closing at the position shown by the dashed line in the figure, and the arm portion 121b is held in contact with the shaft 5a. Pin 12 of lock lever 121
1a and is locked and held at the position shown by the solid line in the figure.

Next, the operation when tripping in this state will be explained.

In FIG. 2, when the trigger latch 24 is pulled in the direction of arrow A, the roller 2324 slides through the notch 2401 of the trigger latch 24 due to the biasing force of the springs 13 and 14, and then comes out of the engaged state and is moved by the roller 2223. The pressure on the shoulder 2201 of the fan-shaped lever 22 is released, the fan-shaped lever 22 rotates clockwise, the crank pin 12 moves to the cutoff position, and the contact of the vacuum switch 1 is opened. This state is shown in FIG. With this operation, crank pin 1
2 moves to the cutoff position, the main shaft 6 rotates clockwise, and the lever 5 moves from the position shown in FIG. 8 to the position shown in FIG. 9. With this, lock lever 1
21 is pushed by the shaft 5a and rotates counterclockwise about the shaft 122, the lock cam 129 is released from the pin 121a, and the handle shaft 34 is rotated clockwise by the biasing force of the torsion spring 130. As a result, the charging mechanism and the lock holding mechanism enter the states shown in FIGS. 7 and 9, respectively, and stand by for the next charging operation.

Now, in this standby state, when the motor M is driven by the input signal and the input gear 104 rotates clockwise, the input roller 105 moves to the input cam 103.
This input cam 103 and the handle shaft 3
4 is rotated counterclockwise and reaches the position shown in solid line in FIG. On the other hand, due to the rotation of the handle shaft 34, the operating rod 11 is moved to the closing link 3 as shown in FIG.
2. Crank pin 12 via input arm 33
It is pushed down using the position as a fulcrum, and the spring 13 is accordingly biased. At the same time, the latch arm 21 is also pushed down and the fan-shaped latch 22
rotates counterclockwise, and the roller 2223 slides on the roll portion 2202 of the fan-shaped lever 22. Since the L-shaped latch 23 is lightly biased clockwise by a spring (not shown) around the rotating shaft 1023, the roller 2223 is attached to the shoulder 2201 by counterclockwise rotation of the fan-shaped lever 22. engage.

On the other hand, since the trigger latch 24 is lightly biased clockwise by a spring (not shown), when the shoulder portion 2201 and the roller 2223 are engaged, the roller 2324 is pushed into the notch 2401 of the trigger latch 24.
It is locked by.

In the process of biasing this series of springs 13,
Until the crank pin 12, connecting pin 1131, and connecting pin 3536 are aligned, the auxiliary spring 40 is also biased and acts to push up the operating rod 11.
After that, the auxiliary spring 40 is released and acts to push down the operating rod 11. Through the above process, the state shown in FIG. 4 is reached.

When the handle shaft 34 further rotates counterclockwise, the roller 32 of the input link 32 engages the locking stopper 42.
01 hits, and the position of the connecting pin 3132 moves from the right side to the left side in the drawing from the line connecting the connecting pin 1131 and the connecting pin 3233, so the force due to the tensile force of the spring 13 and the force due to the expansion force of the auxiliary spring 40 are Due to the force determined by the difference, the operating rod 11 moves as shown in the drawing.
Driven upward, the operating rod 11 rotates about the connecting pin 1121, and the crank pin 12 moves to the closing position. Note that the spring 13 and the auxiliary spring 40
By selecting the size of , the charging speed can be set to a predetermined speed.

As a result of the above, the state returns to the closed state shown in FIG.

In the closed state, the position of the connecting pin 1131 is above the line connecting the crank pin 12 and the connecting pin 3536 in the drawing, so the tensile force of the spring 13 and the expansion force of the auxiliary spring 40 act as an addition. The operation lever 11 is rotated with the fulcrum connecting pin 1121 as a fulcrum.
Since the crank pin 12 is rotated counterclockwise, a large closing force acts on the crank pin 12.

The above-described loading operation is completed when the loading cam 103 reaches the position shown by the solid line in FIG. 6, but the motor M still continues to rotate and the loading roller 105 reaches the position shown by the dashed-dotted line in FIG. Then, by operating the limit switch 108 using the lever 107, the motor M
As mentioned above, stopping the .

Moreover, the main shaft 6 is
is rotated counterclockwise from the position shown in FIG. 9 to the position shown in FIG.
2 in the clockwise direction from the position shown in FIG. 9 to the state shown in FIG. 8. As a result, the end of the lock cam 129 engages with the pin 121a, thereby locking the rotation of the handle shaft 34.

As a result of the above closing operation, the switch operating mechanism section is in the state shown in FIG. 2, the closing mechanism is in the state shown by the dashed line in FIG. 6, and the lock holding mechanism is in the state shown by the solid line in FIG. 8. In this closed state, the trip operation is performed, that is,
By operating the trip latch 24 in response to a trip signal, the switch operating mechanism changes from the state shown in FIG. 2 to FIG. 3, and the closing mechanism changes from the state shown by the dashed-dotted line in FIG. The mechanism operates in the states of FIGS. 8-9, forms a trip state, and waits for the input signal as described above.

By repeating the above closing and tripping operations, the vacuum switch shown in FIG. 1 can be opened and closed, and this embodiment has the following advantages.

(a) The switch requires a large closing holding force (a force that applies the contact pressure of the electrode after closing, but this is achieved not only by the spring 13 but also by the auxiliary spring 4).
Since 0 is added, it is possible to obtain an arbitrary amount of holding force by appropriately designing this size.

(b) Although a switch requires a large closing holding force, it is preferable to limit the closing starting force (the force applied to the movable electrode during closing) to a predetermined range in order to reduce mechanical collisions, chatter, etc. However, by providing the auxiliary spring 40, the closing starting force can be suppressed to a required value while ensuring the required closing holding force.

(c) When performing a closing operation using the handle, with only the spring 13, the operating force becomes heavier as the force is accumulated (that is, as the handle is rotated), but by providing the auxiliary spring 40, the operating force becomes heavier. can be flattened.

(d) In the closing state, it is locked by the lock holding mechanism, so the trip operation from the closing state and the closing operation from the tripping state can be performed reliably, and together with the display mechanism (not shown), Reliability can be improved.

As described above, the switch operation mechanism according to the present invention has the effect of providing a highly reliable switch that has a simple structure, is inexpensive, and can reliably quickly close and close contacts. be.

As described above, according to the switch operating mechanism according to the present invention, the switch contacts can be reliably tripped, closed, and cut off with a simple configuration, and by providing an auxiliary spring, the switch can be operated as required. This has the effect of suppressing the charging start force to a required value while ensuring the charging holding force.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the opening/closing part, Fig. 2 is an explanatory diagram showing the first operating state (closing state) of an embodiment of the operating mechanism part of the switch according to the present invention, and Fig. 3 is the same. An explanatory diagram showing the state during the second operation (blocking state), FIG. 4 is an explanatory diagram showing the state in the process of transitioning from the second operation state to the first operation state, and FIG. An exploded perspective view of the handle shaft operating mechanism of one embodiment for operating the handle shaft of the operating mechanism, FIG. 6 is an explanatory diagram showing the closing operation of the closing mechanism in the handle shaft operating mechanism, and FIG. 7 is the same. FIG. 8 is an explanatory diagram showing the closing operation of the lock holding mechanism in the handle shaft operating mechanism, and FIG. 9 is an explanatory diagram showing the shut-off state. 10...Housing, 11...Operation rod, 12...Crank pin, 13...Spring, 14...Spring, 21...
... Latch arm, 22 ... Fan-shaped lever, 23 ...
L-type latch, 24...Trip latch, 25...
Trip lever, 31... Insertion arm, 32...
Closing link, 33... Closing lever, 34... Handle shaft, 35... Auxiliary link, 36... Auxiliary lever, 40... Auxiliary spring, 38... Stop lever, 40... Stopper, 1022, 1023,
1024... Rotating axis, 1121, 2122, 11
31, 3132, 3233, 3536, 3638
...Connecting pin, 2223, 2324...Roller,
1112...Pin, 101a, 101b, 101
c... Housing of the handle shaft operating mechanism section, 102...
Handle shaft bearing, 103... Closing cam, 104
... Feeding gear, 105 ... Feeding roller, 106...
...Drive gear, 107...Lever for limit switch operation, 108...Limit switch, 121...
... Lock lever, 122 ... Lock lever shaft,
123...Twist spring for lock lever, 129...
...Lock cam, 130...Torsion spring for handle shaft. In addition, in the figures, the same reference numerals indicate the same parts.

Claims (1)

[Claims] 1. A crank pin connected to a movable contact of a switch and supported in a predetermined position when the switch is in an open state, an operating lever having one end attached to the crank pin, and engaging between both ends of the operating lever, a spring that biases the operating lever in a first direction with the crank pin supported at the predetermined position as a fulcrum; a spring that is connected between the crank pin mounting portion of the operating lever and the spring engaging portion; A locking mechanism that locks the input device in a charged state, a handle shaft connected to the other end of the operating rod via a link mechanism consisting of a loading arm, a loading link, and a loading lever, and a handle shaft that rotates the handle shaft. a drive mechanism that moves the operating rod to a predetermined position in a second direction opposite to the first direction while accumulating force in the spring about the fulcrum; Engaged with a portion of the closing link, the operating rod is rotated in the closing direction, which is the first direction, about the connecting portion with the locking mechanism as a fulcrum by the biasing force of the stored spring. a locking stopper that allows the operating rod to release the locking when the operating rod is locked to the locking mechanism in the closed state, and the operating rod releases the connecting portion with the link mechanism by the biasing force of the spring; It is attached to an auxiliary link connected to the other end of the operating rod, and is attached to an auxiliary link that allows the operating rod to be rotated in the shutoff direction as a fulcrum, so that the operating rod is rotated in the same direction as the first direction when the switch is in the closed state. An operating mechanism for a switch comprising an auxiliary spring that urges the operating rod in a direction opposite to the first direction when charging and storing energy.