JPS5981815A - Operating mechanism 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 The present invention relates to an improvement in the operation mechanism of a road circuit breaker.
The purpose is to provide a circuit breaker operating mechanism that has a structural hourly wheel with fewer failures, can be built compactly, and can be obtained at low cost.

The invention will now be described in detail with reference to the figures. As best shown in Figure 1.2, the circuit breaker main body 1 has main circuit terminals 2, 3 on the back and a switch tube 4 between the two terminals. The internal switch of the switch tube 4 is closed by pushing up the push-up rod 5 at the bottom thereof. Operation mechanism section 6
is incorporated into one side of the main body 1 in a flat manner.

As shown in FIG. 3, the push-up rod 5 is pivotally connected to a mounting lever 8 via a spring 7, and the spray lever 8 passes through the main body 1 and rotates between its side plates 9 and 10. It is fixed to the side of the main shaft 11 which is installed so as to protrude from the side.

The main shaft 11 has an arm 12 extending laterally near one side plate 9, and further extends from the distal end of the arm 12 in the direction of extension of the main shaft 11, and is provided with an elongated hole 9a in the longitudinal direction of the side plate 9. An operating shaft 13 that freely passes through and projects into the mechanism section 6
has.

Therefore, the main shaft 11 is connected to the long hole 9a of the operation shaft 13.
The push-up rod 5 is rotated by vertical movement within the shaft, and the push-up rod 5 is moved up and down. A stopper bin 15 is provided near the other side plate 10 of the main shaft 11 and protrudes toward the side plate 10 via an arm 14 extending laterally.
A stopper protrusion 16 is fixed to the stopper pin 15, which comes into contact with the stopper pin 15 during its rotation to prevent its rotation.

The operating mechanism section 6 is configured on the outside of the side plate 9. As clearly shown in FIG. 4.5, one end of the main lever 17 is rotatably attached to the tip of the operating shaft 13 protruding from the elongated hole 9a of the side plate 9.

A latch roller 18 is located near one end of the main lever 17.
is pivoted, and a charging roller 19 is pivoted near the other end.

A bracket 20 is pivotally supported on the shaft of the latch roller 18,
A shutoff spring 22, which is a push spring, is interposed between the bracket 20 and the upper frame plate 21 of the mechanism section 6, so that the main lever 17 is urged downward. Further, a bracket 23 is attached to the other end of the main lever 17-.
A closing spring 24, which is a pressing spring, is also interposed between this and the upper frame plate 21, and the main lever 17 is also urged downward. A support rod 39 passes through the push spring 24, and the upper part of the support rod 39 projects upward through the upper frame plate 21 and the stopper plate 40 above the upper frame plate 21, and has a stopper at its tip to prevent the lowering. A nut 41 is screwed together.

The latch 25 is pivoted 14 times below the latch roller 18 and freely pivoted 1IvJ times on the side wall 9, and is urged by a pull spring 26 to rise up 1 times p++1 times in the clockwise direction. The oblique side 25a can come into sliding contact with the latch roller 18.

The hold levers 27 and 271 are provided so that the latch 25 can be freely sandwiched therebetween, and a trip roller 28 is pivotally attached to one end of the hold levers so as to be in sliding contact with the upper left side of the latch 25. (QIJ slope 9 can be freely rotated 1
It is fixed to a shaft 29 through which it passes. The shaft 29 has a trip lever 30 projecting outward on the inside of the side plate 9, and this trip lever 3° is connected to the shaft 29 and the hold lever 27 by a helical spring 31 interposed between the side plate 9 and the side plate 9.
It is also biased clockwise. Trip lever 3o
The side in the biasing direction is energized in response to a tripping command, and is
Push out the rod 34 of the Φ iron core 32 and release the trip lever 3.
A trip coil 33 that presses and rotates o in the counterclockwise direction is fixed. The movable core 32 can also be pushed in by hand from the front of the main body.

A charging cam 35 is provided below the charging roller 19 so as to be rotatable by a motor M inside the side plate 9. The charging cam 35 slides on the charging roller 19 to push up and rotate the main lever 17, and instantaneously releases the main lever 17. As clearly shown in FIG. 6, the motor M is fixed to the inside of the side plate 9 via a chaotic gear head.
The rotating shaft 36 of this gear head freely passes through the side plate 9 and projects into the mechanism section 6, and a cam lever 37 is attached thereto. The cam lever 37 protrudes outward, and a connecting pin 37a is protruded from the outside of the Q section. The input cam 35 is fitted into the shaft cylinder 37b of the cam lever 37 so as to be relatively rotatable, and the connecting pin 37a is connected to the input cam 35.
It is movably fitted into an elongated hole 35a of the circular arc wipe. The axis H37b of the cam lever 37 is 8! It is rotatably supported by the cover plate 38 of the structural part 6. Therefore, the input cam 35 rotates by being transmitted with the rotation of the cam lever 37 via the connecting pin 37a, and rotates once for each rotation of the main lever 17.
Push up and release.

Next, the effect will be explained. FIG. 7 shows the operating mechanism section 6 in the open state of the circuit breaker switch. In this state, the operating shaft 13 is located below within the elongated hole 9a. When a closing command is issued from this state, the closing cam 35 is activated by the motor M.
rotates clockwise, and the feeding roller 1 is rotated by its cam surface.
9, the main lever 17 is pushed up so as to rotate counterclockwise about the operating shaft 13 while compressing the springs 22 and 24, thereby storing energy in the springs 22 and 24. At this time, the latch roller 18 also rises, so the latch 25 is gradually released and rotated clockwise by the spring 26. The hold lever 27 also springs 3 according to the latch 25's rotation 1.
1 rotates clockwise. Then, the input cam 35
rotates further and reaches the position shown in Figure 5, the latch 25
stands up, the top of its oblique side 25a is located directly below the latch roller 18, and the main lever 17
rides on the top of the oblique side 25a of the latch 25, and the latch roller 1
It is now in a state where it can be rotated ~clockwise using the pivot point 8 as a fulcrum. At this point, the hold lever 27 is almost horizontal, holding the latch 25 in an upright position. When the input cam 35 further rotates and comes off the input roller 19 as shown in FIG. At this time, the operating shaft 13 moves up inside the elongated hole 9a, rotates the main shaft 11, pushes up the push-up rod 5, and turns on the switch in the vacuum switch tube 4. Note that after the input cam 35 is removed from the input roller 19, the input cam 3
5 is subjected to the downward force of the input roller 19 by the instantaneous input spring 24 in its rotational direction, and thus receives a forced rotational force. If this force is directly transmitted to the motor M side, the gear head will be damaged, but in this embodiment, the closing cam 35
While receiving the downward force of the charging roller 19, the charging cam 3
5 is disengaged from the pin 37a within the range of its elongated hole 35a and freely moves to the same side, thereby allowing the downward force of the closing cam 35 to be released. Next, when shutting off the switch from the closed state, issuing a trip command will energize the trip coil 33 and push out the rod 34, which will push the trip lever 30 and push the hold lever 27.
It is also rotated counterclockwise. Then, the trip roller 28 comes off the upper side of the latch 25, so the latch 25 is released, and due to the restoring force of the blocking spring 22, the latch roller 18 rotates the latch 25 counterclockwise while moving the latch 25 toward its oblique side 25a. It descends while rolling. At the same time, the main lever 17 rotates counterclockwise in the Wr direction about the pivot of the bracket 23 of the closing spring 24, and the operating shaft 13 descends within the elongated hole 9a. As a result, the main shaft 11 is rotated counterclockwise, its push-up rod 5 is lowered, and the switch in the vacuum switch tube 4 is cut off. The rotation range of the main shaft 11 is limited by the contact between the stopper pin 15 and the stopper protrusion 16.

As explained above, the present invention pivots one end of the main lever 17 to one end of the operating shaft 13 that moves up and down to turn on and off the switch, and blocks the inner vicinity of the pivoted part of the main lever 17. The spring 22 and the closing spring 24 urge the vicinity of the side end of the main lever 17 in the downward rotation direction, respectively, and the loading roller 19 is inserted between the connecting portions of the springs 22 and 24 of the main lever 17. , and the above ≧fζ breakage 22
A latch roller 18 is provided at each joint of the main lever 17, and a charging cam 35 is provided below the main lever 17, which is rotated by a motor M to push up the charging roller 19 and instantly release it. Under the roller 18 (14), a latch 25 is pivoted, which is released when the latch roller 18 is pushed up by the input cam 35, and the rotation layer 1 stands up due to the urging spring force, and can push up and hold the latch roller 18. A trip coil 33 is provided near the latch 25 to force the latch 25 to fall down by excitation and remove the fulcrum of the main lever 17. When the closing cam 35 pushes up the main lever 17, the shutoff spring 22 and closing spring 24 are energized. At the same time,
After making a fulcrum by raising the latch 25 in contact with the main lever 17, the closing cam 35 is removed from the main lever 17, and the closing spring 24 causes the main lever 17 to pivot in one direction, thereby pushing up the operating shaft 13. Turn on the switch and
Also, by excitation of the trip coil 33, the latch 25 is tilted down, the fulcrum is moved to the connection part of the closing spring 24, and the breaking spring 2
2, the main lever 17 is rotated in the opposite direction, and the operating shaft 13 is lowered to shut off the switch. The effect of being able to provide an inexpensive operation mechanism for the circuit breaker can be obtained.

[Brief explanation of the drawing]

Figure 1 is a front view of the entire circuit breaker, Figure 2 is a side view of the same, and Figure 3 is a front view of the entire circuit breaker.
The figure is a perspective view of a part of the operating mechanism, FIG. 4 is a front view of the same, FIG. 5 is a side view of the same, FIG. 6 is a perspective view of another part of the operating mechanism, and FIGS. 7 and 8. is a side view of the operating device IRs showing the operating conditions. 1...Body, 4...Vacuum switch tube, 5...
・Push-up rod, 6... Operating mechanism section, 11...
Main shaft, 13... Operating shaft, 17... Main lever, 18... Latch roller, 19...
Closing roller, 22... Cutoff spring, 24... Closing spring, 25... Usochi, 26... Pulling spring, 2
7.Hold lever, 30..1~Rip lever, 32..0 Wm iron core, 33. . ...Trip coil, 34...Rod, 35...
・Insertion cam 1M...Motor. 2 Figure 2 Figure 3

Claims (1)

[Claims] An operating shaft that reciprocates to turn on and off a switch, a main lever with one end rotatably attached to the operating shaft, and one end of the main lever biased in one direction of rotation. a closing spring that biases the other side of the main lever in one rotational direction; a latch roller provided at a connecting portion of the closing spring of the main lever; and a closing spring that biases the main lever toward the other side; It is provided near the input roller provided between the input roller and the spring joint, and the biasing side of the main lever, and is rotated by a motor to push the input roller in the opposite direction and release it instantly. a closing cam, which is pivoted near the latch roller on the biasing force side of the main lever and is always urged in the rotating upright direction, and stands up when the main lever is pushed up by the closing cam to push up the latch roller. A latch that can be held, and a trip coil that is energized by a cutoff command to cause the erected latch to fall down and remove the fulcrum of the main lever, the operation shaft being rotated as the fulcrum of the main lever moves. A circuit breaker operating groove characterized by reciprocating to turn on and off a switch.