JP3356890B2 - Circuit breaker operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker operating device for turning on and off a circuit breaker by a trip coil which is always excited.

[0002]

2. Description of the Related Art A conventional circuit breaker operating device has the structure shown in FIG. In FIG. 1, reference numeral 1 denotes a constant-excitation trip coil that changes from an excited state to a non-excited state when cut off.
The coil 3, the iron 4 and the plunger 5 which can move up and down are housed in a magnetic case 2 composed of upper and lower end plates and side plates, and the plunger 5 is attracted by exciting the coil 3.

Reference numeral 6 denotes a support provided on an end plate of the case 2;
Reference numeral 7 denotes a recess formed on the support base 6 in which the plunger 5 moves up and down. Reference numeral 8 denotes a bearing provided at the bottom of the recess 7. Reference numeral 9 denotes a vertical movement shaft having a base planted at the end of the plunger 5. In addition, it is inserted into the bearing 8 and penetrates the support base 6.

[0004] Reference numeral 10 denotes a pin in the front-rear direction penetrated through the end of the plunger 5, reference numeral 11 denotes a screw groove formed at the end of the vertical movement shaft 9, and reference numeral 12 denotes a disk screwed into and fixed to the screw groove 11. 13 is a fixed plate fixed to the support 6, 14 is the fixed plate 1
A tripping spring provided between the base plate 2 and the fixing plate 13; a planting rod 15 planted on the left side of the end plate of the case 2; a support plate 16 standing upright on the right side of the support base 6; Is an operation lever whose center is rotatably supported on the left side of the support plate 16, and one end of which is in contact with the implantation rod 15. Reference numeral 18 denotes a locking groove formed at the upper edge of one end of the operation lever 17, and 19 denotes a bearing provided at the other end of the operation lever 17.

Reference numeral 20 denotes a torsion spring provided at the center of the operation lever 17, one end of which is engaged with the support plate 16, the other end is engaged with the other end of the operation lever 17, and the operation lever 17 is moved to the right. It is biased in the direction of rotation. 21 is a base plate 16
The locking lever 22 is rotatably supported on the right side of the operating lever 17, and the locking part 22 on the left side of the tip is locked to the other end of the operation lever 17. Reference numeral 23 denotes a main shaft that is rotatably provided on the right side of the case 2 and is connected to the main circuit. Reference numeral 24 denotes a main shaft lever having a base fixed to the main shaft 23, and a distal end of the main shaft lever 24 is engaged via a link 25. The stop lever 21 is connected to the right side of the distal end.

Next, the operation will be described. The illustration shows a closed state in which the main shaft 23 is rotated leftward, and the plunger 5 and the vertical moving shaft 9 are in a position where the plunger 5 and the vertical moving shaft 9 are attracted by the excitation of the coil 3.
The release spring 14 is compressed by the contact plate 12 of the vertical movement shaft 9, one end of the operation lever 17 abuts on the implanted rod 15, and the other end of the operation lever 17 is locked by the locking portion 22 of the locking lever 21. Then, the closed state of the main circuit is maintained.

Next, when a cutoff command is received, the coil 3 changes from the excited state to the non-excited state, and the plunger 5 and the vertical movement shaft 9 move downward by the releasing force of the tripping spring 14, and the pin 10
Abuts against the locking groove 18 of the operation lever 17 and presses it, accumulates the torsion spring 20 while rotating the operation lever 17 counterclockwise,
The other end of the operating lever 17 is disengaged from the engaging portion 22 of the engaging lever 21, the engaging lever 21 rotates left while sliding on the lower edge of the operating lever 17, and the main shaft 23 rotates right,
The main circuit is turned off.

Next, upon receiving a throw command, the coil 3 is excited, the plunger 5 and the vertical movement shaft 9 are attracted and moved upward by the priming iron 4, and the pin 10 is disengaged from the locking groove 18 of the operation lever 17. Then, the trip spring 14 is compressed.

On the other hand, the main shaft 23 rotates counterclockwise and the locking lever 2
1 rotates clockwise while sliding the lower edge of the operating lever 17, and when the other end of the operating lever 17 is located on the left side of the tip of the locking lever 21, the operating lever 17 rotates clockwise by the biasing force of the torsion spring 20. Then, the main circuit is locked in the locking portion 22 of the locking lever 21 to maintain the closed state of the main circuit.

[0010]

In the case of the above-mentioned conventional apparatus, a large amount of attraction force is required because the tripping spring 14 is stored and held by the attraction force of the coil 3 at the time of a closing command. And the coil 3 becomes large.

In view of the above, the present invention is intended to provide a circuit breaker in which a tripping spring is tripped, energy is stored and held with a small suction force of the coil, the load force of the tripping coil is reduced, and the tripping coil can be downsized. It is an object to provide an operation device.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a constant-excitation trip coil that changes from an excited state to a non-excited state when cut off ,
A base is planted at the end of the plunger that can move up and down on the coil.
Vertical movement axis and a semi-circular
A notch for a hacker, an operation lever fixed to the rotation shaft, and a portion between a tip of the vertical movement shaft and one end of the operation lever.
And a latch spring provided at the other end of the operation lever.
The tripping spring stopped , the main shaft connected to the main circuit, and the base
Is fixed to the main shaft, and a tip portion abuts on the rotating shaft,
A locking lever for holding the closed state of the main circuit,
In the loading preparation state, the tip of the locking lever is
The main circuit is located at the notch for the
The tripping coil is excited, and is operated by the operation lever.
The latch spring is compressed, and the spindle is
The tip of the locking lever is
The trip coil is separated from the notch and the trip coil is excited.
The plunger is in a suction state, and the operation lever is
Is slightly rotated by the biasing force of the latch spring.
The tip of the locking lever abuts on the rotating shaft and locks,
When the main circuit is turned on, the trip spring
And the tripping spring shuts off the rotating shaft.
The other end of the operation lever is urged to rotate
The trip state is maintained by the shut-off command.
Becomes non-excited, and the operation lever and the rotation shaft
The locking lever is rotated by the pulling force of the trip spring,
Rolls, passes through the notch for the hacker and cuts off the main circuit
The locking lever is moved forward by the
When the tripping coil is positioned in the notch
Is excited, the locking lever of the tip notch on for the mint
The latch spring is pressed by the operating lever.
This is a circuit breaker operating device that is contracted and is ready for closing. Contract
The invention according to claim 2 is characterized in that, when the power is cut off, the excitation state changes to the non-excitation state.
Between the constant excitation trip coil and the trip coil.
Upper and lower sides with a base planted at the end of the plunger that can move up and down
And vertical movement axis of the direction, and is fixed to the rotation shaft lever, One
One end is locked to the plunger of the trip coil, and the other end is
A latch spring locked to one end of the operating lever and one end
At a substantially intermediate portion between one end of the operation lever and the rotation shaft
Locked trip spring and formed at the other end of the operation lever
Locking groove, the main shaft connected to the main circuit, and the base
Main shaft lever fixed to the main shaft and urged in the blocking direction
And a latch pin provided at the tip of the spindle lever.
In the loading preparation state, the spindle lever
A latch pin is detached from the locking groove of the operation lever,
The main circuit is shut off and the plunger is
The latch spring,
The spring is stretched and stored, and the operating lever is
It is urged by the latch spring in the closing direction.
The energy stored in the latch spring is equal to the energy stored in the trip spring.
The main shaft rotates by the input command,
The latch pin of the spindle lever slides on the operation lever.
When the operating lever is in the locking groove,
The latch groove is slightly rotated by the latch spring, and the locking groove is
Abuts and locks on the chippin and holds the main circuit in the closed state
The tripping coil is de-energized by the shut-off command.
The plunger is lowered by the biasing force of the latch spring.
Move, and the operation lever is actuated by the releasing force of the tripping spring.
Rotate, the latch pin disengages from the locking groove, and the
The main shaft lever rotates and the main circuit is shut off, ready for closing
According to the state command, the trip coil is excited and the
The plunger is sucked, the operation lever rotates, and the
The latch spring and the trip spring are stretched and stored.
The operation lever is moved in the closing direction by the latch spring.
This is a circuit breaker operating device that is energized and becomes ready for closing.

[0013]

The circuit breaker operating device of the present invention configured as described above is provided with a normally-excited trip coil that changes from an excited state to a non-excited state at the time of shut-off, and has an operating lever fixed to the rotating shaft.
At the time of the closing preparation state, the latch spring is tripped and the energy is accumulated by the suction of the plunger of the coil, and the operating lever is urged by the accumulated latch spring so that the rotating shaft rotates in the closing direction. Since the operation lever is biased by the tripping spring so that the rotating shaft rotates in the blocking direction, the tripping spring is stored with a small suction force of the tripping coil, and the load force of the tripping coil can be reduced. The size of the detached coil can be reduced.

Further, by increasing the lever ratio of the operation lever, the attraction force of the trip coil can be further reduced and the size can be reduced. In addition, because of the high-speed breaking operation of the circuit breaker,
Even when the load of the trip spring is increased, the increase in the load force of the trip coil can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. In those figures, the same reference numerals as those in FIG. 4 indicate the same or corresponding elements.

[0016] (Example 1) First, In Fig 1 showing a first embodiment, 26 is a rotating shaft, rotating to the left of the vertical shaft 9 planted trip to the plunger 5 of the coil 1 It is provided freely.

Reference numeral 27 denotes a semicircular cutout for the hacker formed at the tip of the rotary shaft 26, reference numeral 28 denotes an operating lever fixed to the base of the rotary shaft 26, and reference numeral 29 denotes one end of the operating lever 28. It is an insertion hole through which the vertical movement shaft 9 is inserted. 3
0 is a disk-shaped contact plate provided at the tip of the vertical motion shaft 9;
Is a latch spring provided between the abutment plate 30 and one end of the operation lever 28; 32 is a locking rod projecting from the case 2 of the trip coil 1; 33 is a trip spring; 28, and the other end is locked to a locking rod 32.

Reference numeral 34 denotes a main shaft that is rotatably provided on the upper right side of the trip coil 1 and is connected to a main circuit 35. Reference numeral 36 denotes a locking lever having a base fixed to the main shaft 34, and a tip end of the rotary shaft 26. And the closed state of the main circuit 35 is maintained.

Next, the operation will be described with reference to FIG. FIG. 2A is a modification of FIG. 1, and FIG. 2A is in a loading preparation state, in which the main shaft 34 rotates counterclockwise, and the tip of the locking lever 36 is located in the notch portion 27 of the rotating shaft 26 for the main shaft. Circuit 3
5 is blocked. On the other hand, the plunger 5
The latch spring 31 is compressed by the tilted operation lever 28 as shown by the broken line in FIG.

Next, upon receiving the input command, as shown in FIG. 2B, the main shaft 34 rotates clockwise, the tip of the locking lever 36 is disengaged from the notch 27, and the main circuit 35 is turned on. Become. At this time, the coil 3 is energized, since the plunger 5 is in the attraction state, one end of the operating lever 28 positioned at the broken line position of FIG. 1 is slightly rotated clockwise by release force of the latch spring 31, the locking lever The distal end of the abutment 36 comes into contact with the rotary shaft 26 and is locked, the main circuit 35 is turned on, and the trip spring 33 is extended.

The tripping spring 33 urges the other end of the operating lever 28 so as to rotate the rotating shaft 26 in the blocking direction, that is, in the counterclockwise direction, and the closed state is maintained. That is, the state shown by the solid line in FIG. 1 is obtained.

Next, when receiving the cutoff command, as shown in Figure 2C, the coil 3 becomes unexcited, together with the plunger 5 is on dynamic by release force of the latch spring 31, the operating lever 28 and the rotary shaft 26 Due to the pulling force of the trip spring 33, the operation lever 28 is turned to the left as shown by the broken line in FIG. 1, the locking lever 36 is turned to the left, passes through the notch 27 for the hacker, and the main circuit 35 is shut off. .

Next, when a command for a preparation state for input is received,
The coil 3 is excited in a state where the locking lever 36 is located at the notch notch 27, and the plunger 5 is sucked. At this time, since the distal end of the locking lever 36 is located in the notch 27 for the hacker, the rotating shaft 26 does not rotate, and as shown by a broken line in FIG. 31 is compressed. Then, the latch spring 31 urges one end of the operation lever 28 in a closing direction, that is, a clockwise direction, and enters a closing preparation state as shown in FIG. 2A.

(Embodiment 2) Next, FIG.
1, the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding components. Reference numeral 37 denotes a rotating shaft rotatably provided below the right side of the trip coil 1, and reference numeral 38 denotes a rotating shaft 37 at the center thereof.
An operation lever 39 is fixed to the plunger 5 of the coil 1 at one end, and a latch spring is fixed at the other end to the left end of the operation lever 38. Reference numeral 40 denotes a tripping spring whose one end is locked substantially at the intermediate portion between the left end of the operation lever 38 and the rotating shaft 37, and 41 denotes a locking groove formed on the lower edge of the right end of the operation lever 38.

Reference numeral 42 denotes a stopper, which is fixedly provided above and below the right end of the operation lever 38, and restricts the moving range of the operation lever 38. Reference numeral 43 denotes a main shaft lever whose base is fixed to the main shaft 34, which is urged in the left rotation direction by a spring (not shown). Reference numeral 44 denotes a latch pin provided at the tip of the spindle lever 43.

Next, the operation will be described. FIG. 3A shows a loading preparation state, in which the operation lever 38 abuts against the stopper 42 that is clockwise rotated downward, the main shaft 34 rotates left, and the main shaft lever 4 is rotated.
The third latch pin 44 is disengaged from the locking groove 41 of the operation lever 38, and the main circuit 35 is shut off. On the other hand, the plunger 5 is attracted by the excitation of the coil 3 and the latch spring 3
9. The trip spring 40 is stretched and stored, and the operating lever 38 is urged by the latch spring 39 in the closing direction, that is, in the clockwise direction. In this state, the energy stored in the latch spring 39 is larger than the energy stored in the trip spring 40.

Next, upon receiving the input command, as shown in FIG. 3B, the main shaft 34 rotates clockwise, and the latch pin 44 of the main shaft lever 43 slides the operating lever 38 while slidingly contacting the inclined portion at the right end of the operating lever 38. Push up, latch pin 4
When 4 is located in the locking groove 41, the operating lever 38 is slightly rotated clockwise by the latch spring 39, the locking groove 41 abuts on the latch pin 44 and is locked, and the main circuit 35 is held in the closed state.

Next, when a cutoff command is received, as shown in FIG. 3C, the coil 3 is de-energized, the plunger 5 is moved down by the biasing force of the latch spring 39, and the operation lever 38 is turned off by the release spring 40. Rotate counterclockwise by the release force, and operate lever 3
8 contacts the upper stopper 42. At this time, the latch pin 44 is disengaged from the locking groove 41, the main shaft lever 43 is rotated left by a spring (not shown), and the main circuit 35 is shut off.

Next, upon receiving a command of a preparation state for loading,
When the coil 3 is excited and the plunger 5 is attracted, the operation lever 38 is rotated clockwise to abut against the lower stopper 42, and the latch spring 39 and the trip spring 40 are stretched and stored, and the operation lever 38 is latched. The spring 39 is urged in the closing direction, that is, the clockwise direction, and enters a loading preparation state as shown in FIG. 3A.

In the first and second embodiments, the length l ₂ from the fulcrum of the operating levers 28 and 38 to the point of action of the latch springs 31 and 39 and the trip springs 33 and 4 from the fulcrum.
When the ratio l ₂ / l ₁ to the length l ₁ to the locking point 0, that is, the lever ratio of the operating levers 28, 38 is increased, the trip springs 33, 40 are tripped and stored with a smaller attraction force than the coil 1. And the load force of the trip coil 1 is further reduced.

[0031]

Since the present invention is configured as described above, it has the following effects. The circuit breaker operating device according to the present invention is provided with a constant excitation trip coil 1 that changes from an excited state to a non-excited state when the circuit breaker is operated, and the operating levers 28 and 38 are fixed to the rotating shafts 26 and 37, and the latch is operated in a closing preparation state. The springs 31 and 39 are tripped to accumulate by the suction of the plunger 5 of the coil 1, and the operation levers 28 and 38 are rotated by the accumulated latch springs 31 and 39 so that the rotating shafts 26 and 37 rotate in the closing direction. In the closing state, the operating levers 28, 38 are urged by the tripping springs 33, 40 so that the rotating shafts 26, 37 rotate in the blocking direction, so that the tripping springs 33, 40 are tripped. 1, the energy can be stored with a small suction force, the load force of the trip coil 1 can be reduced, and the trip coil 1 can be downsized.

Further, by increasing the lever ratio of the operation levers 28 and 38, the attraction force of the trip coil 1 can be further reduced and the size can be reduced. In addition, even when the load of the trip springs 33 and 40 is increased for the high-speed breaking operation of the circuit breaker , the increase in the load force of the trip coil 1 can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic front view of Embodiment 1 of the present invention.

2A, 2B and 2C are explanatory diagrams of the operation of FIG.

FIGS. 3A, 3B, and 3C are operation explanatory diagrams of a second embodiment of the present invention.

FIG. 4 is a cutaway front view of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 trip coil 5 plunger 26 rotating shaft 28 operating lever 31 latch spring 33 trip spring 37 rotating shaft 38 operating lever 39 latch spring 40 trip spring

Continuation of the front page (56) References JP-A-59-60939 (JP, A) JP-A-50-58274 (JP, U) JP-A-63-171935 (JP, U) JP-A-59-144739 (JP, U) , U) Japanese Patent Publication No. 50-31277 (JP, B1)

Claims (2)

(57) [Claims] A trip coil which is always excited to be changed from an excited state to a non-excited state when shut off, and a base is provided at an end of the plunger which is movable up and down of the trip coil.
A vertical movement shaft in which a vertical axis is implanted, a semicircular hack notch formed in the rotation shaft, an operation lever fixed to the rotation shaft, a tip of the vertical movement shaft and the operation lever Between one end of
A latch spring, a release spring locked to the other end of the operation lever, a main shaft connected to a main circuit, a base fixed to the main shaft, and a front end abutting on the rotary shaft.
And a locking lever for holding the closed state of the main circuit.
In the loading preparation state, the tip of the locking lever is
The main circuit is located at the notch for the
The tripping coil is excited, and is operated by the operation lever.
The latch spring is compressed, and the rotation of the main shaft in response to a closing command causes the locking lever to rotate.
Of the hacker is removed from the notch for the hacker,
The coil is energized and the plunger is
And one end of the operation lever is provided with a biasing force of the latch spring.
And the tip of the locking lever rotates
When it comes into contact with the shaft and locks, and the main circuit is turned on,
In addition, the trip spring is extended, and the trip spring is
The operation lever is rotated so as to rotate the rotation shaft in a blocking direction.
The other end of the coil is energized , the closed state is maintained, and the tripping coil is de-energized by the shut-off command.
The operating lever and the rotating shaft are pulled by the tripping spring.
, The locking lever rotates, and the
After passing through the notch, the main circuit is cut off and the locking lever is moved to the
The trip coil is excited when it is located in the
And the tip of the locking lever is located in the notch for the hacker.
The latch spring is compressed by the operating lever.
The breaker operating device that is ready for closing. 2. The state changes from an excited state to a non-excited state at the time of interruption.
A constant excitation trip coil, A base is provided at the end of the plunger which can move up and down of the trip coil.
A vertical movement axis in which a vertical direction is implanted, An operation lever fixed to the rotating shaft, One end is locked to the plunger of the trip coil, and the other end is
A latch spring locked to one end of the operation lever, One end is substantially centered between one end of the operation lever and the rotation shaft.
A tripping spring locked in the space, A locking groove formed at the other end of the operation lever, A spindle connected to the main circuit; A main shaft having a base fixed to the main shaft and urged in a blocking direction
Lever and A latch pin provided at the tip of the spindle lever.
e, In the closing preparation state, the latch pin of the spindle lever is
Is released from the locking groove of the operation lever, and the main
The path is blocked and the plunger excites the trip coil.
The latch spring and the trip spring are attracted by magnetism.
It is stretched and charged, and the operating lever is
The spring is urged in the loading direction by the
The accumulating force of the latch spring is larger than the accumulating force of the trip spring.
listen, With the input command, the spindle rotates and the spindle lever
While the latch pin slides on the operation lever, the engagement
When located in the stop groove, the operation lever is moved to the latch spring.
Rotate slightly, and the locking groove contacts the latch pin.
And the main circuit is held in a closed state, The tripping coil is de-energized by the shut-off command,
The plunger moves down by the biasing force of the latch spring,
The operation lever is rotated by the releasing force of the trip spring.
The latch pin is disengaged from the locking groove, and the spindle
The lever rotates, the main circuit is interrupted, The trip coil is energized by the
The plunger is sucked and the operation lever rotates.
And the latch spring and the trip spring are pulled Stretched
And the operation lever is thrown by the latch spring.
Circuit breaker operating device which is urged in
Place.