JPH089862Y2 - Operating device for closing the circuit breaker - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an operating device for closing a circuit breaker for closing a circuit breaker by releasing the stored closing spring.

B. Outline of the Invention The present invention is an operating device for closing a circuit breaker that stores the closing spring in the first half rotation of the closing cam, releases the closing spring in the remaining half rotation, and closes the circuit breaker. , When the closing operation is completed and the closing cam reverses, the projection formed on the closing cam presses the buffer means via the stopper so that the closing cam is reversed after the closing operation is completed. The swing is prevented from occurring and the operating device is prevented from vibrating.

C. Prior art Fig. 3 shows the block diagram of the operating device used to insert the vacuum circuit breaker used in the gas insulated switchgear.

The operating device is configured as follows. The rotation of the motor 1 as a drive means is transmitted to the gear 3 via the speed reducer 2,
The gear 4 is rotated. The gear 4 is rotatably supported by the rotating shaft 6 and fixed to the arm 5, and the arm 5 is attached to the rotating shaft 6 via a one-way clutch. A closing cam 7 is attached to the rotating shaft 6, and a holding plate 9 attached to the closing spring 8 and a position of the closing cam 7 apart from the rotating shaft 6 are connected via a rod 10. On the other hand, the central portion of the arm 12 is fixed to the operation shaft 11 for turning on and off the vacuum circuit breaker (not shown) by rotating, and one end thereof is located below the closing cam 7.

The rotation of the motor 1 causes the closing cam 7 to rotate in the direction of the arrow, and when the position of the pin 13 which is the connecting portion between the rod 10 and the closing cam 7 exceeds the top dead center, the hook 14 comes into contact with the protrusion 17, As shown in FIG. 4 (a), the storage is completed. At this time, the closing spring 8 is in a compressed state. When the hook 14 is removed from the protrusion 17, only the closing cam 7 rotates right by the action of the one-way clutch due to the releasing force of the closing spring 8, and one end of the arm 12 is pushed downward at high speed as shown in FIG. 4 (b). ,
The operating shaft 11 rotates counterclockwise and the vacuum circuit breaker is turned on. At the time of closing, an interruption spring (not shown) attached to the other end of the arm 12 stores energy, and the taper portion 15a of the lock lever 15 engages with the other end of the arm 12 to move to the right. When the hook 16 engages with the lock lever 15 that is about to turn to, the breaking operation of the vacuum circuit breaker is blocked.

When the hook 16 is removed from the lock lever 15, the lock lever 15
Is rotated to the right, and the arm 12 is rotated in the direction shown by the broken line in FIG. 3 by the release of the breaking spring, and the vacuum circuit breaker is cut off.

Even after the closing of the vacuum circuit breaker is completed, the closing cam 7 is rotated by the inertial force, and is rotated to the position shown by the chain double-dashed line in FIG. This reverse rotation is blocked by the action of the one-way clutch.

D. Problems to be solved by the device However, since the one-way clutch blocks the rotational movement of the closing cam that tries to rotate in the reverse direction, a large vibration is generated in the operating device.

Therefore, the one-way clutch needs to be a large clutch that does not rotate in the reverse direction even when the torque is greater than the reverse torque of the closing cam (maximum torque of the closing spring). Therefore, the cost becomes high.

Then, this invention aims at providing the operating device for closing a circuit breaker which solved such a subject.

E. Means for Solving the Problems The structure of the present invention for achieving such an object is a presser plate for fixing a closing cam to a rotating shaft that is interlockingly connected to a driving means and for storing a closing spring, Closing circuit breaker in which an arm whose one end is pushed out by the closing cam is attached to the operating shaft that connects and disconnects the circuit breaker by rotating and connecting the position of the closing cam away from the rotating shaft via a rod. In the operating device for a vehicle, a stopper is provided in the vicinity of the closing cam so as to be rotatable, and a buffering means for stopping the rotation of the stopper and a return spring for urging the stopper toward the buffering means are provided, while a breaker is provided. Immediately before the rotation direction of the closing cam changes after turning on, the stopper is rotated toward the anti-buffering device side, and the stopper is overcome, and after the rotation direction is changed, the closing cam reverses and the stopper is inserted. A buffer means so as to press Te, and characterized by forming a protrusion that engages with the tip end portion of the stopper to a position away from the rotation axis in the closing cam.

F. Action After the circuit breaker is closed and immediately before the closing cam rotation direction changes, the projection of the closing cam presses the tip of the stopper, which causes the stopper to rotate against the biasing force of the return spring. The projection gets over the stopper. When the closing cam reverses and the stopper is pressed from the opposite direction,
Since the stopper hits the buffer means, reverse rotation of the closing cam is prevented, and the buffer due to the stop of the closing cam is absorbed by the buffer means.

G. Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Since the present embodiment is an improvement of a part of the conventional operating device for closing the circuit breaker, the same parts as those of the prior art are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

(A) Configuration of the Embodiment The configuration of the operating device for closing the circuit breaker according to the present invention is as follows.
It will be described with reference to the drawings.

As shown in the figure, a stopper 21 is provided near the closing cam 7 so as to be rotatable around the support shaft 20. The tip of the stopper 21 projects toward the rotary shaft 6. Below the stopper 21, there is provided a buffer means 22 for preventing the stopper 21 from rotating in the clockwise direction.
A return spring 23 that biases the lower end of 21 is provided. Buffer means
22 is an impact shaft 26 inserted into the through hole 25 of the support member 24,
It is composed of a disc spring 27 inserted through the impact shaft 26.

The stopper 21 and the cushioning means 22 are provided at positions satisfying the following requirements. That is, when the rotation of the closing cam 7 is stopped and the rotation direction is changed after the closing, the pin 13 is overcome without being restricted by the stopper 21 just before the closing cam 7 in the figure finishes rotating in the clockwise direction. It is provided at a position where it is restrained by the stopper 21 when trying to reverse the rotation thereafter.

(B) Operation of Embodiment Next, the operation of the operating device for closing the circuit breaker will be described with reference to FIGS.
It will be described with reference to the drawings.

The closing cam 7 rotates clockwise due to the release of the closing spring 8, and immediately before the rotation is stopped, the pin 13 contacts the tip of the stopper 21 as shown in FIG. At this time, the return spring
Since the stopper 21 is pushed upward against the urging force of the stopper 23, the stopper 21 rotates counterclockwise, and as a result, the pin 13 moves along the locus shown by the alternate long and short dash line in the figure to move the stopper 21. I will get over it. When the closing spring 8 is released and the closing cam 7 tries to rotate counterclockwise, the first
As shown in FIG. 7A, the pin 13 pushes the stopper 21 from top to bottom, and the stopper 21 tries to rotate clockwise. At this time, the lower end of the stopper 21 pushes the buffer means 22, and the disc spring 27 is compressed. In other words, the kinetic energy due to the reverse rotation of the closing cam 7 is absorbed by the disc spring 27,
Vibration caused by stopping the closing cam 7 does not occur.

H. Effect of the Invention As can be seen from the above description, the operating device for closing the circuit breaker according to the present invention has the following effects.

Since the stopper that prevents the rotation of the closing cam is provided immediately after the closing cam reverses, the swing due to the reverse rotation of the closing spring is prevented.

Further, since the shock absorbing means for preventing the impact due to the stop of the rotation of the closing cam is provided, the impact does not occur when the closing cam stops, and the vibration of the operating device is prevented.

Furthermore, the expensive one-way clutch that has been used in the past is not required, and the cost is reduced.

[Brief description of drawings]

FIGS. 1 and 2 relate to an embodiment of an operating device for closing a circuit breaker according to the present invention. FIG. 1 (a) is a configuration diagram of a main part, and FIG. 1 (b) is FIG. 1 (a). Left side view, FIG. 2 is an explanatory view of operation, FIGS. 3 to 4 are related to a conventional operating device for closing a circuit breaker, FIG. 3 is a configuration diagram of the operating device, FIG. 4 (a),
(B), (c) is operation explanatory drawing. 1 ... Motor, 6 ... Rotary axis, 7 ... Driving cam, 8 ...
Closing spring, 9 ... Presser plate, 10 ... Rod, 11 ... Operation axis, 12 ... Arm, 20 ... Support axis, 21 ... Stopper, 22
…… Cushioning means, 23 …… Return spring.

Claims (1)

[Scope of utility model registration request] 1. A holding plate for fixing a closing cam to a rotating shaft which is interlocked with a driving means and storing a closing spring, and a position of the closing cam separated from the rotating shaft are connected via a rod. In an operating device for closing a circuit breaker, in which an arm whose one end is pushed out by a closing cam is attached to an operation shaft that turns on and off the circuit breaker by rotating, a stopper is rotatably provided near the closing cam. In addition to providing a buffering means for stopping the rotation of the stopper and a return spring for urging the stopper toward the buffering means, the stopper is provided with an anti-buffering means immediately before the direction of rotation of the closing cam changes after the circuit breaker is closed. The rotation axis of the closing cam is such that the closing cam reverses and pushes the buffering means through the stopper after the rotation direction changes and the rotation direction changes. Operating device of the circuit breaker for turned, characterized in that the formation of the protrusion engages the distal portion of the stopper in position.