JP2536931Y2 - Spring actuator for circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a spring operating device for a circuit breaker of a type in which a closing spring is charged by the biasing force of a closing spring.

2. Description of the Related Art As a breaker operating device, there is a so-called spring-in / spring-off type operating device that accumulates a breaking spring by an urging force of a closing spring.

The present applicant has previously described FIG. 4 (A) as this type of operating device.
And Japanese Patent Application Laid-Open No. 63-19718 (Japanese Patent Application No. 61-161466). FIG. 4A shows a state in which both the closing spring 2 and the blocking spring 4 are charged, and FIG. 4B shows a state in which the blocking spring is released. In these figures, 1 is a frame for fixing the operation device, 2 is a closing spring fixed to the frame 1, 3 is a link mechanism supported on the frame 1, 4 is a blocking spring fixed to the frame 1, 5 is A shock absorber fixed to one end side of the cut-off spring 4, 6 a charging mechanism for storing the closing spring, 7 an output shaft to the breaker, 8 a plunger rod,
9 is a slider and 10 is a lock pin of the controller. The fourth
In FIGS. (A) and (B), an axis indicated by a black circle means an axis fixed to the frame 1.

The link mechanism 3 includes a first link mechanism 30 that controls the release of the closing spring 2, a second link mechanism (a trip link mechanism) 31 that releases the release spring 4, and a releasing force of the closing spring 2. To the blocking spring 4. 33 is a movable axis X1 connecting the links 32b and 32e of the main link mechanism 32.
And a hook, ie, an engaging member, which engages with the holding member to maintain the charged state of the blocking spring.

The operating device drives the plunger rod 8 by the release of the closing spring 2 to displace the slider 9, and transmits the displacement of the slider 9 to the output shaft 7 via the main link mechanism 32 to perform the closing operation of the circuit breaker. Do. In the course of this closing operation, an operating force is applied to the blocking spring 4 by the urging force of the closing spring 2 to accumulate the blocking spring. As shown in FIG.
Is stored by the engagement member 33 and the trip link mechanism 31. The force stored in the blocking spring 4 is released via the link 32e of the main link mechanism 32.
Is transmitted to each link.

When releasing the breaker spring 4 to open the circuit breaker, the engagement between the lock pin 10 and the semicircular rotary engagement member 31h called a hook is released. When the engagement between the lock pin 10 and the rotation engagement member 31h is released, the engagement between the notch 31g1 of the engagement member 31g and the movable shaft X2 to which the link 31e and the link 31f are connected is released. And the trip link mechanism 31 and the main link mechanism 32
Are deformed as shown in FIG. 4 (B). Thereby, the engagement between the engagement member 33 and the movable shaft X1 is released, and the blocking spring 4 is released.

[Problem to be Solved by the Invention] The conventional operating device shown in FIGS. 4A and 4B has the following problems.

(B) In order to prevent excessive force from being applied to the rotation engagement member 31h, a number of links are provided in the trip link mechanism 31, and the force transmitted from the blocking spring 4 through the main link mechanism 32 is reduced. Since the guide member is guided to the rotating engagement member side while being attenuated, the number of components constituting the trip link mechanism 31 becomes very large, and assembly becomes troublesome and cost increases.

(B) The purpose of the circuit breaker is to operate immediately when a trip command is issued and to open a faulty circuit, so that the circuit breaker is actually activated after the trip command is issued. It is desirable that the time until the device operates is as short as possible. However, since the conventional trip link mechanism 31 is complicatedly configured by a large number of links, after a trip command is given and the engagement between the lock pin 10 and the rotation engagement member 31h is released, It has been difficult to reduce the time until the main shaft 7 rotates.

(C) In the conventional tripping link mechanism 31, there is an engaging portion between the notch 31g1 of the rotary engaging member 31g and the movable shaft X2 in the middle of the transmission path. In this engagement portion, the notch 31 g1 and the movable shaft X2 are engaged so as to collide with each other when the blocking spring 4 is charged, so that the wear is remarkable, and this shortens the life of the link mechanism. Had become.

An object of the present invention is to provide a spring operating device for a circuit breaker that has a simple structure, can operate at high speed, and has a long life.

[Means for Solving the Problems] The spring operating device for a circuit breaker to which the present invention is directed is a closing spring 2 for applying a closing operating force to the circuit breaker, and a breaking spring 4 for providing a breaking operating force to the circuit breaker. And between the closing spring 2 and the blocking spring 4, the urging force of the closing spring 4 is transmitted to the blocking spring 4 to accumulate the blocking spring 4 by the biasing force of the closing spring 2, and A main link mechanism 32 that is partially engaged with the engaging member 33 to be fixed when the energy storage is completed.
And a rotation engaging member 310h provided so as to be held at the locking position in engagement with the locking pin 10 provided on the controller, and the rotation engaging member 310h and the locking pin The main link model is held in a fixed state when
When the engagement between the lock member and the lock pin is released, the engagement between the main link mechanism 32 and the engagement member 33 is released with the rotation of the rotation engagement member, and the locked state of the main link mechanism is released. And a trip link mechanism 310 for releasing.

In the present invention, a pair of frame plates 1a and 1b are provided facing each other at a predetermined interval, and a pair of guide slots 1a1 and
1 b1 is formed.

The trip link mechanism 310 has a pair of guide slots 1a1.
And a moving rod connected to one end of a link 32e constituting a part of the main link mechanism 32, with both ends fitted and held in the guide long hole so as to be able to move along the longitudinal direction of 1b1. 310a and a return spring 310d for urging the moving rod 310a toward one end in the longitudinal direction of the guide slots 1a1 and 1b1.
And two arm portions 310 provided at a predetermined angle.
a V-shaped pivot having an e1 and 310 e2 and an intermediate portion rotatably supported by the pair of frame plates via a shaft 310f while being disposed between the pair of frame plates 1a and 1b. Link 310e
Is disposed between the pair of frame plates 1a and 1b, and one end is connected to the moving rod 310a, and the other end is connected to one arm 310 e1 of the rotating link 310e via a shaft to move. A first connecting link 310c provided to be able to rotate relatively to the rotating link with the movement of the rod 310a
One end is connected to the other arm 310 e2 via a shaft so that the other arm 310 e2 can be relatively rotated with respect to the other arm 310 e2 of the rotation link. And a second connection link 310g whose other end is connected to the rotation engaging member 310h via a shaft so as to be rotatable relative to the rotation engaging member 310h. When the lock pin 10 and the rotation engagement member 310h are engaged, the moving rod 310a
Is fixed to one end side of the guide slots 1a1 and 1b1 to fix the main link mechanism in the state of being engaged with the engagement member 33, and the engagement between the lock pin and the rotation engagement member is released. At this time, the main rod mechanism is moved to the other end side of the guide elongated hole by relatively rotating the rotation engagement member 310h, the second connection link, and the rotation link, thereby connecting the main link mechanism to the engagement member. The positional relationship between the guide elongated hole, the first and second connection links, and the rotation engagement member is set so as to be detached from the link 33.

[Operation] As described above, the moving rod 310a that is fitted and held in the guide elongated holes 1a1 and 1b1 formed in the pair of frame plates 1a and 1b is provided, and is transmitted from the main link mechanism 32 side. When the stored force of the blocking spring 4 is transmitted to the rotary engaging member 310h via the moving rod 310a, the force transmitted from the main link mechanism side in the conventional operating device shown in FIG. A large number of links provided for guiding to the dynamic engagement member can be omitted.

Further, as described above, the moving rod 3 e moves between the link 32 e constituting a part of the main link mechanism 32 and the rotation
10a, the first connecting link 310c, and the shaft 31 on the frame plates 1a, 1b.
V-shaped rotating link 310e with an intermediate portion supported via 0f
And the second connecting link 310g, the majority of the force transmitted from the main link mechanism is received by the frame plates 1a and 1b via the shaft 310f of the rotating link 310e. Therefore, only by sufficiently increasing the strength of the shaft 310f of the rotating link 310e, it is possible to withstand the force transmitted from the main link mechanism side.

In the conventional operating device shown in FIG. 4, a complicated link mechanism is provided in order to attenuate the force transmitted from the main link mechanism side to the rotation engagement member side. As described above, most of this force is received by the frame plates 1a and 1b via the shaft 310f of the rotating link 310e, so that the tripping link mechanism 310 is configured without providing a complicated link mechanism. be able to.

Further, when the rotating link 310e is formed in a V-shape as described above, the length and angle of the arms 310e1 and 310e2 of the rotating link are appropriately determined, so that the force applied to the second connecting link 310g is determined. Can be reduced, so that the tripping operation can be controlled using the lock pin 10 and the rotation engagement member 310h as in the related art.

As described above, according to the present invention, since the number of links constituting the trip link mechanism can be reduced,
The trip operation speed can be increased.

In addition, in the present invention, the life of the link mechanism can be prolonged because the engagement portion that causes wear is not provided in the middle of the tripping link mechanism.

Further, in the present invention, the moving rod 310a is connected to the guide slot 1a1.
And a return spring 310d that urges one end in the longitudinal direction of 1b1
Is provided, it is possible to assist the returning operation of the moving rod and quickly perform the returning operation of the trip link mechanism.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a configuration of a main link mechanism and a trip link mechanism in a closed state of an operation device according to an embodiment of the present invention.
The figure shows a partial cross-sectional view of the main part of FIG. The configuration of the operating device of this embodiment other than the portions shown in FIGS. 1 and 2 is the same as that of the conventional operating device shown in FIG.

In FIG. 1, the axes painted black are the axes fixed to the frame plates 1a and 1b.

In the present invention, as shown in FIG. 2, a pair of frame plates 1a and 1b opposed to each other at a predetermined interval are provided, and a link mechanism is disposed between the pair of frame plates. You. In the pair of frame plates 1a and 1b,
A pair of guide slots 1 a1 and 1 b1 extending in a substantially vertical direction
Are formed in alignment with each other. FIG. 1 shows only one frame plate 1a of the pair of frame plates.

The moving rod 310a is inserted into the pair of guide slots 1a1 and 1b1.
Guide rollers 310b rotatably provided at both ends of the main link mechanism 32 are movably fitted and held. One end of a link 32e forming a part of the main link mechanism 32 is attached to the moving rod 310a,
Is connected to one end of the connection link 310c. One end of a return spring 310d is fixed to the moving rod 310a, and the other end of the spring is fixed to the frame plates 1a and 1b. The movable rod 310a is urged by the return spring 310d to one end side in the longitudinal direction of the guide slots 1a1 and 1b1.

A rotating link 310e is rotatably supported by the pair of frame plates 1a and 1b by a shaft 310f. Rotating link
310e is two arms provided at a predetermined angle
A V-shaped link having 310 e1 and 310 e2, and an intermediate portion thereof is supported by frame plates 1 a and 1 b by a shaft 310 f. The other end of the first connection link 310c is rotatably connected to one arm portion 310e1 of the rotation link 310e via a shaft, and the first connection link is moved with the movement of the movement rod 310a.
The 310c can rotate relatively to the rotation link.

One end of a second connection link 310g is rotatably connected to the other arm 310e2 of the rotation link 310e via a shaft. The other end of the second connection link 310g is connected to the rotation engagement member 310h via a shaft so that the second connection link 310g can rotate relatively to the rotation engagement member 310h. The rotation engagement member 310h is formed in a semicircular shape, and as shown in FIG. 1, the end of the flat surface engages with the lock pin 10 and is held at the lock position. It has become. 310i is a rotation engagement member
This is a return spring that urges 310h.

In the operation device shown in FIGS. 1 to 3, as shown in FIG.
When the main rod mechanism 32 is engaged with the engaging member 33 while the moving rod 310e is fixed to one longitudinal end of the guide slots 1a1 and 1b1 when the main link mechanism 32 is engaged with the engaging member 33h. And the relative rotation of the rotation engaging member 310h, the second connection link and the rotation link when the engagement between the lock pin 10 and the rotation engagement member 310h is released. By moving rod 310a
Are moved to the other end in the longitudinal direction of the guide slots 1 a1 and 1 b1 so that the main link mechanism 32 is pulled off from the engagement member 33, and the guide slots 1 a1 and 1 b1, The positional relationship between the second connection link 310c and the rotation engagement member 310h is set.

In the above embodiment, when a trip command is issued, the lock pin 10 rotates, and the engagement between the lock pin 10 and the rotation engagement member 310h is released. When the engagement between the lock pin 10 and the rotation engagement member 310h is released, the rotation link 310e rotates in the direction of the arrow shown in the figure, and the moving rod 310a moves the guide slot 1a1 and
1 Move toward the other end (lower end) in the longitudinal direction of b1. As a result, the main link mechanism 32 is disengaged from the engaging member 33 and the fixed state is released, and the blocking spring 4 is released. FIG. 3 shows an overall view of the state at the moment when the tripping operation is completed. Thereafter, the moving rod 310a is pulled back to one longitudinal end of the guide slots 1a1 and 1b1 by the urging force of the return spring 310d, and the trip link mechanism 310 returns to the state shown in FIG. At this time, the rotation engaging member 310h is simultaneously
It returns by the spring force of 0i and engages with the lock pin 10. The links 32b and 32e of the main link mechanism 32 approach each other with the return of the moving rod 310a, and the link 32a is displaced so as to bring the slider 9 into contact with the tip of the plunger rod 8.

When closing the circuit breaker, the closing spring 2 is released and the slider 9 is pushed and moved by the plunger rod 8. At this time, since the trip link mechanism 310 is already in the fixed state, the moving rod 310a does not move, and the link 32e rotates about the moving rod 310a. As a result, the main link mechanism 32 returns to the state shown in FIG.

[Effects of the Invention] According to the present invention, the following effects can be obtained.

(A) A moving rod that is fitted and held in a long slot for guide formed in a pair of frame plates disposed opposite to each other and moves is provided, and the accumulated force of the blocking spring transmitted from the main link mechanism side is applied to the moving rod. Since the power is transmitted to the rotation engaging member via the rotary actuator, a number of links provided to guide the force transmitted from the main link mechanism side to the rotation engaging member side in the conventional operating device are omitted. be able to.

(B) A V-shape in which an intermediate portion is supported between a link constituting a part of the main link mechanism and the rotation engagement member by a moving rod, a first connecting link, and a frame plate via a shaft. And the frame plate receives most of the force transmitted from the main link mechanism via the shaft of the rotating link. By simply increasing the strength of the shaft of the dynamic link, it is possible to withstand the force transmitted from the main link mechanism side. Many links provided to attenuate the transmitted force can be omitted. Therefore, the structure of the tripping link mechanism can be simplified in combination with the effect of the above (a), and the assembly of the link mechanism can be facilitated to reduce the manufacturing cost.

(C) Since the force transmitted from the main link mechanism is transmitted to the rotation engaging member via the V-shaped rotation link, the length and angle of the arm portion of the rotation link Is appropriately determined, the force applied to the rotation engaging member via the second connection link can be reduced. Therefore,
The tripping operation can be controlled by using the same lock pin and the rotation engagement member as in the related art, and it is not necessary to use a particularly enhanced lock pin and the rotation engagement member.

(D) Since the number of links constituting the trip link mechanism can be reduced, the trip operation speed can be increased, and the time required for the spindle to start moving after the trip command is given is reduced. can do.

(E) The life of the link mechanism can be prolonged because an engagement portion that causes wear is not provided in the middle of the trip link mechanism.

(F) Since the return spring for urging the moving rod toward one end in the longitudinal direction of the guide elongated hole is provided, the return operation of the trip link mechanism can be quickly performed.

[Brief description of the drawings]

FIG. 1 is a view showing a main part of an embodiment of the present invention, FIG. 2 is a partial sectional view of a main part of FIG. 1, FIG. 3 is a view showing a state in the middle of a tripped state, FIG. (A) and (B) are the figures which show the structure of the conventional operating device. 1 ... frame, 1a, 1b ... frame plate, 1 a1 and 1 b1
... Long hole for guiding, 2 ... Spring spring, 3 ... Link mechanism, 31,310 ... Link mechanism for trip, 310a ... Movable rod, 310c ... First connection link, 310e ... Rotating link,
310g ... second connection link, 310h ... rotary engagement member, 32
…… Main link mechanism, 4 …… Cutting spring, 5 …… Buffer, 6
...... Energy storage mechanism, 7 ... output shaft, 8 ... plunger rod, 9 ... slider, 10 ... locking pin.

Claims (1)

(57) [Scope of request for utility model registration] A closing spring (2) for applying a closing operating force to a circuit breaker, and a closing spring (4) for applying a closing operating force to the circuit breaker.
And a biasing force of the closing spring (2) disposed between the closing spring (2) and the blocking spring (4) so as to accumulate the blocking spring (4) by the biasing force of the closing spring (2). Spring (4)
And a main link mechanism (32) that is partially engaged with the engaging member (33) to be fixed when the charging of the blocking spring is completed, and a locking pin provided in the controller. (10) The rotation engagement member (310) provided so as to be held in the locked position by being engaged with (310).
h), the main link mechanism is held in the fixed state when the rotation engaging member (310h) and the lock pin are engaged, and the rotation engagement member (310h) and the lock When the engagement with the pin is released, the main link mechanism (32) and the engagement member (33) are released from engagement with the rotation of the rotation engagement member, and the main link mechanism is fixed. Release link mechanism (31
0), a pair of frame plates (1a and 1b) are provided facing each other at a predetermined interval, and a pair of guide plates are aligned with the pair of frame plates. Slots (1a1 and 1b1) are formed, and the trip link mechanism (310) is moved so as to be able to move along the longitudinal direction of the pair of guide slots (1a1 and 1b1). The moving rod (310) connected to one end of a link (32e) constituting a part of the main link mechanism, with both ends fitted and held in the guide slot.
a) and the moving rod (310a) is inserted into the guide slots (1a1 and 1b).
1) Return spring (310d) that urges one end in the longitudinal direction
A pair of frame plates (1a and 1b) having two arm portions 310 e1 and 310 e2 provided at a predetermined angle.
A V-shaped rotating link (310e) in which an intermediate portion is rotatably supported by the pair of frame plates via a shaft (310f) while being disposed therebetween, and the pair of frame plates (1a and 1b), one end is connected to the moving rod (310a), and the other end is connected to one arm (310e1) of the rotation link (310e) via a shaft, A first connecting link (310c) provided so as to be able to rotate relatively to the rotating link with the movement of the moving rod (310a), and being disposed between the pair of frame plates; One end is connected to the other arm portion (310 e2) via a shaft so as to be able to rotate relatively to the other arm portion (310 e2) of the rotation link, and The other end of the rotation engaging member (310h) is rotatable relative to the engaging member (310h).
And a second connecting link (310g) connected via a shaft to the moving rod (310a) when the lock pin (10) and the rotation engaging member (310h) are engaged. ) Is fixed to one end side of the guide slots (1a1 and 1b1) to fix the main link mechanism in a state where the main link mechanism is engaged with the engagement member (33). When the engagement with the link is released, the rotating rod (310h), the second connecting link, and the rotating link are relatively rotated, so that the movable rod is connected to the other of the guide elongated holes. The positional relationship among the guide long hole, the first and second connection links, and the rotation engagement member is such that the main link mechanism is moved to the end side and the main link mechanism is pulled off from the engagement member (33). A spring operating device for a circuit breaker, which is set.