JPS6196619A - Operator for breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operating device that uses an operating spring to perform the closing operation and the tripping operation of a breaker.

[Conventional technology]

Figures 1 to 6 all show the conventional operating device of this type of circuit breaker, with Figure 1 being a front view and Figure 2 being the same as in Figure 1.
8 is a cross-sectional view taken along the line (III)-(III) of FIG. 1, and FIGS.
Fig. 6 is an explanatory diagram of the operation. First, in Figs. 1 and 2, (1) is the frame, (2) is the support pin that rotatably supports the operating lever (3), and (4) is the above-mentioned operation. Lever (3
) is connected to an opening/closing device (not shown), and this connecting pin (4) is always maintained by a trip spring (not shown) provided in the opening/closing device (not shown) It is biased in the direction of arrow (C). (6) is a roller rotatably mounted by a pin (7) in a groove (5) formed at a predetermined position of the operating lever (3), and (8) is a roller that is mounted at a predetermined position of the operating lever (3). This stopper pin (8) is a implanted stopper pin.
As shown in the figure, the operation lever (3) is engaged with the hook (10a) of the first latch lock, which is rotatably supported at a predetermined position of the frame (1) by a support pin (9). This is provided to prevent rotation in the counterclockwise direction. (2) is a frame (
1) A first trigger lever rotatably supported at a predetermined position by a support pin α°C.
(2) is provided to lock the clockwise rotation of the first latch aO when the first tripping electromagnet α6, which will be described later, is deenergized. (to) and α◆ are return springs for returning the first latch αQ and the first trigger lever (2) counterclockwise, respectively. A tripping electromagnet with a plunger (G) that advances and retreats with a predetermined stroke, Q
7) is a frame (
1) is rotatably supported at a predetermined position, and is the main shaft of the breaker, and the roller (
6) is integrally attached with a cam (T) that slides into and out of contact with the cam.

Next, in Fig. 8, α- is a ratchet wheel integrally attached to the main shaft Qη, and on both sides of the groove (1) formed on the outer periphery of this ratchet wheel α9, a pair of saws are provided in a range of approximately 1800 mm. Blade-shaped teeth (2) &! υ is provided. And this ratchet wheel a
9 is subjected to a force to rotate counterclockwise by the closing spring (B) described later, the support pin @: the hook portion of the second latch (good) that is rotatably supported. (2
4a) is adapted to prevent rotation of the ratchet wheel Ql by engaging with a stylus bar installed at a predetermined position on the side surface of the ratchet wheel (6). Furthermore, the stopper pin (2) of the ratchet α9 is attached to the hook (24a) of the second latch (C).
Even if an attempt is made to rotate this second latch (goods) counterclockwise by engaging the Since the trigger lever (E) is engaged with this second latch (C), rotation is locked.弼 is the second above
a return spring for returning the latch (c) clockwise;
@ is a return spring that returns the second trigger lever (E) counterclockwise, and (7) is the power supply's 1°C NJ roFFJ.
A charging electromagnet 6υ having a plunger 4 that advances and retreats with a predetermined stroke is rotatably supported on the frame (1) in the vicinity of the ratchet wheel α.
This eccentric shaft is rotated at a predetermined speed by an eccentric shaft (not shown), and two eccentric ring portions having different eccentric directions (180°) are formed on the eccentric shaft, and an eighth As shown in the figure, a pair of drive claws with different lengths are fitted together so as to be swingable. The tips of both drive claws (to) are adapted to come into sliding contact with a pair of sawtooth teeth υ formed on the outer periphery of the ratchet wheel α9, and are adapted to be in sliding contact with a pair of sawtooth teeth υ formed on the outer periphery of the ratchet wheel α9. When both driving pawls (7) (to) alternately perform rocking motion with the rotation, both driving pawls @μs alternately engage with teeth c+nuυ of the ratchet α field to move the ratchet a9 counterclockwise. It is made to rotate in the direction. (b) is a crank pin (
7), and the other end is connected to a spring receiving plate (7) that supports the free end of the closing spring (7), and a bushing (86a)
) via 1. 3. The restoring elastic force of the compressed closing spring (2) is transmitted to the main shaft αη via the crank rod and the ratchet wheel q1, and the main shaft is rotated counterclockwise. The figure shows a state in which a rotational force of .

A conventional circuit breaker operating device is configured as described above, and the tripping operation will be explained first.

In FIG. 2, when the tripping electromagnet Q0 is excited and the plunger (to) extends, its tip engages one end of the first tri-force lever (2) and pushes it clockwise against the return spring 04. This first trigger lever (2
) is separated from the first latch αQ, and this first latch lock becomes free. Therefore, the connecting pin (4) of the operating lever (3) which is always biased in the direction of the arrow (Q)
) rapidly rotates in the direction of the arrow (0) to perform a tripping operation of the opening/closing device (not shown) connected thereto.The state during this tripping operation is shown in FIG. 4. During the above-described tripping operation, the structural members shown in FIG. 8 do not operate at all.

Next, the charging operation will be explained.

In Fig. 8, when the closing electromagnet ■ is energized and the plunger arm extends, its tip engages one end of the second trigger lever (G), and pushes it clockwise against the return spring (7). This second trigger lever (7)
The other end is detached from the second latch (c), and this second virtual latch becomes free. Therefore, the ratchet wheel CIO, which had been prevented from rotating due to the engagement of the stopper pin (2) with the hook portion (24a) of this second latch, is moved by the restoring elastic force of the compressed closing spring (b). It rapidly rotates counterclockwise together with the main shaft Qη. Therefore, as shown in Fig. 4, the cam (to) that is integral with this main shaft αη also rotates counterclockwise, so this cam (to) is rotated counterclockwise.
3) Rotate the operating lever (3) clockwise via the roller (6). Therefore, the connecting pin (4) of this operation lever (37) rotates in the opposite direction to the arrow (Q) to close the opening/closing device (not shown) connected to it, and simultaneously releases the tripping spring! (not shown). The control lever (3) is compressed to store energy.
At the time when the lever returns to the state shown in FIG. 2, the first latch αO and the first trigger lever (6) are also returned to their original states by the return spring α-○. Then, the cam (to) further rotates together with the main shaft αη, and the roller (61) of the operating lever (3)
As shown in Fig. 6 of the operation lever (3), the stopper pin (8) engages with the hook (10a) of the first latch (1 (J), locking the rotation. Therefore, the closed state of the switchgear is maintained.

Note that after the main shaft αη rotates counterclockwise to the bottom dead center due to the restoring elastic force of the closing spring (B), the main shaft 0η given by this closing spring (B), the cam (to),
The closing spring (b) is rotated again while being compressed by the rotational energy of the ratchet wheel α9, and stops when the rotational energy disappears. After this, the main shaft α force starts to rotate clockwise again due to the restoring elastic force of the closing spring (B), but the drive pawls (To) engage with tooth D (2) of the ratchet wheel α. Rotation is locked by matching.

Next, I will explain the energy storage operation of the closing spring (b).

When the closing operation described above is completed, the closing spring (9)
As shown in the figure, when the eccentric shaft (B) is rotated by the deceleration motor (not shown) and the drive claws (to) alternately perform rocking motion, both drive The pawls (to) engage the teeth (c) of the ratchet wheel α and rotate the ratchet wheel counterclockwise, so the crank rod ■ gradually compresses the closing spring (b). And then I started accumulating energy. Then, as shown in FIG. 8, the closing spring 6
When θ is fully compressed, the second latch (money) and the second trigger lever (e) will return to their original states (,) due to the return spring (a), so the claw Even if the car aS attempts to rotate counterclockwise due to the restoring force of the input spring 6η, the stopper pin (2) of this ratchet wheel
By engaging the hook portion (24a) of the latch (c), the rotation is locked and the charged state of the closing spring can is maintained.

[Problems that Kanmei tries to solve]

Since the conventional circuit breaker operating device fa1 is configured as described above, if the closing electromagnet is excited by an erroneous signal while the closing spring (b) is energized, the second trigger lever is activated. (C) separates from the second latch (C), and as this second latch becomes free, the ratchet wheel θ→ is unlocked, and when the breaker is accidentally closed, the closing spring (A) It has the disadvantage that it is energized without any load.

This invention was made with attention to this point, and even if the closing electromagnet (7) is energized by an erroneous signal when the breaker is in the closed state and the closing spring (7) is energized, It is an object of the present invention to provide a breaker operating device in which the second trigger lever (7) is not disengaged from the second latch and the closing spring (b) is not released under no load.

[Means for solving problems]

The breaker operating device according to the present invention is configured such that an operating piece swingably attached to the tip of a plunger of a closing electromagnet is changed in direction by a kick lever that is rotated in conjunction with a tripping electromagnet. be.

[For production]

According to this invention, even if the closing electromagnet is erroneously energized when the breaker is in the closed state and the closing spring is energized, the kick lever that is rotated in conjunction with the tripping electromagnet can be used to control the operation. Even if the direction of the closing electromagnet is changed and the excited plunger of the closing electromagnet is extended, the operation piece avoids the trigger lever and does not operate it, thereby preventing the closing spring from being released.

〔Example〕

That is, although FIGS. 7 to 10 all show one embodiment of the present invention, the above-mentioned conventional ones (FIGS. 1 to 10)
Since the same reference numerals as in FIG. 6) refer to the same structural members, the explanation thereof will be omitted.

First, in FIGS. 7 and 9, (10b) is a notch step formed at the tip of the first latch QL), and this notch step (10b) has a support pin attached to the frame (1). (
6), one end of a kick lever rotatably supported is removably engaged with the other end of the kick lever (b), and a kick pin is implanted in the other end of the kick lever (b). When the kick lever (B) is rotated clockwise, an operating piece (to be described later) is rotated counterclockwise. (B) is a spring that always biases the kick lever in the clockwise direction.

Next, in FIGS. 8 and 10, reference numeral 2) is an operating piece pivotably attached to the tip of the plunger arm of the input electromagnet (1) by means of a support hinge (b). When the closing electromagnet ■ is energized and the plunger ■ extends, if the kick lever (rotation) does not engage, it engages with one end of the second trigger lever (7), resisting the return spring (end). is rotated clockwise to perform the above-mentioned closing operation.

Then, at the end of this closing operation, as described above, the first latch QQ is connected to the stopper pin (8) of the operating lever (3).
, the first latch aO rotates counterclockwise, changing from the state shown in FIG. 7 to the state shown in FIG. (10b) and rotates clockwise by the spring ■, the kick pin at the other end of the kick lever (B) pushes up the free end of the operating piece as shown in Figure 10 and rotates counterclockwise. Since the closing electromagnetic magnet field is erroneously excited and the plunger (A) extends, the operating piece (■) will not engage the second trigger lever (E), and therefore the closing spring force will be released without any load. I never feel pressured.

〔Effect of the invention〕

As described above, according to the present invention, even if the closing electromagnet (7) is energized by an erroneous signal when the breaker is in the closed state and the closing spring (b) is energized, the second
This has an excellent effect of preventing the closing spring (9) from being released under no load due to rotation of the trigger lever.

4. Detailed Description of the Invention Figures 1 to 6 all show a conventional operating device for this type of circuit breaker.
Fig. 8 is a cross-sectional view taken along the line fl)-(n), and Fig.
01)-(1) sectional view and FIGS. 4 to 6 are operation explanatory diagrams. 7 to 10 all show an embodiment of the present invention, FIG. 7 is a sectional view of a portion corresponding to FIG. A sectional view of a portion corresponding to FIG. 8, and FIGS. 9 and 10 are operation explanatory views.

In the figure, (1) is the frame, (3) is the operating lever,
(4) is the connecting pin, (8) is the stopper pin, Q7) is the main shaft, αQ is the first latch, (10b) is the notch step, (2)
is the first trigger lever - 1O is the ratchet wheel, (a) is the stopper pin, (goods) is the second latch, (to) is the second trigger lever - 14 is the plunger, ■ is the closing solenoid valve, and works ( 2) is the drive pawl, (B) is the input spring, (B) is the kick lever, (B) is the support pin, (B) is the kick pin, the cast spring, and - is the operating piece. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (3)

[Claims] (1) In a device in which the closing operation of the opening/closing device is performed via an operating lever and a ratchet wheel loaded with a closing spring, an operating piece is attached to the plunger of the closing solenoid valve corresponding to the trigger lever that locks the rotation of the ratchet wheel. , the operating piece is tripped and the direction is changed by a kick lever that is rotated in conjunction with the solenoid valve, and even if the closing electromagnet is accidentally energized, this operating piece avoids the trigger lever and prevents the closing spring from releasing. A circuit breaker operating device characterized by: (2) The kick lever is rotated by being released from the notch step of the latch rotated by the operation lever at the end of the closing operation, and the direction of the operation piece is changed via the kick pin. A circuit breaker operating device according to claim 1. (3) The operating device for a circuit breaker according to claim 1, wherein the kick lever is configured such that the direction of the operating piece is changed by a spring.