JPS5926096B2 - Switch operation mechanism - Google Patents

Description

[Detailed description of the invention] The present invention relates to a switch operating mechanism.

Furthermore, prior to the quick cutting and closing of the switch due to the release of the charged spring force, the operating link connected to the movable contact of the opening/closing part is gradually rotated, and when the spring force is suddenly released, the operation link is moved. This is an improvement in which the contactor already has some initial velocity so that the switch can be turned on and off smoothly.

It is important to perform opening and closing operations as quickly as possible not only in circuit breakers that interrupt fault currents, but also in switches that open and close load currents and charging currents.

However, when attempting to rapidly move a stationary movable contact, energy is consumed due to acceleration, resulting in a loss of speed.

All conventional switches that attempt to obtain operating force during opening/closing operations by releasing charged spring force suddenly cause the movable contact, which is stationary until the dead point is exceeded, to suddenly move beyond the dead point. The system uses a spring force released by the robot to cause rapid movement.

Therefore, the above-mentioned drawbacks remain as essential attributes that cannot be avoided.

Therefore, in view of the fact that the above-mentioned disadvantages of the prior art are caused by the rapid state change in which the movable contact transitions from a stationary state to an operating state, the present invention provides an approach to the movable contact prior to sudden release of spring force. The purpose of this invention is to provide an operating mechanism that can guarantee smooth closing and closing operations of the switch by attaching the following.

Therefore, the configuration includes a second lever whose base end is fixed to a rotatable shaft and a second lever whose base end is pivotally connected to the shaft, and the first lever and the second lever are connected to each other. A spring is installed between the tips of the second lever, and the base end of the second lever is provided with arms that extend on both sides in a direction perpendicular to the longitudinal direction of the second lever. One end of the operating link connected to the movable contact of the arm is pivotally connected, and the lever engages with one of the arms when the first lever rotates in one direction as the shaft rotates in one direction. a first auxiliary lever having an abbreviated shape, which contacts the second lever and transmits the rotational force at this time to the second lever, causing the second lever to rotate in the opposite direction; and a first auxiliary lever in the opposite direction of the shaft. When the second lever rotates in the opposite direction as the lever rotates, it engages with the other arm and comes into contact with the second lever, transmitting the rotational force to the second lever as well. The present invention is characterized in that it has a second auxiliary lever in the shape of an abbreviation for rotating the two levers in the one direction.

Embodiments of the present invention will be described in detail below based on the drawings.

Figures 1a to 1C are during the switch closing operation, and Figures 2a to 1C are
FIG. 2C is a front view of this embodiment showing the state during the shutoff operation.

As shown in FIGS. 1A to 2C, a worm 2 is fixed to the tip of a transmission shaft 1 which is connected to an appropriate drive source (not shown) and is rotatable. A worm wheel 3 fixed to a shaft 4 is engaged with the worm 2.

-! A base end portion of a second lever 5 is fixed to the shaft 4, which rotates due to the rotational force transmitted through the transmission shaft 1, the worm 2, and the worm wheel 3 when driven by the drive source. The proximal end of No. 6 is pivotally connected.

A spring 7 is mounted between the tips of the first lever 5 and the second lever 6.

The pins 8 and 9 have the function of suspending the spring 7, and the pin 9 also has the function of connecting the second lever 6 and the operation link 10.

Further, the other end of the operation link 10 is connected to a movable contact (not shown) of an opening/closing part (not shown) of the switch, and as the second lever 6 rotates, the movable contact It has the function of moving up and down.

Further, at the base end of the first louver 50, there is an integral arm 5a extending from both sides in a direction perpendicular to the longitudinal direction of the first louver 5.

5b is formed.

When the first lever 5 is rotated clockwise from the state shown in FIG.
The first auxiliary lever 11 is brought into contact with the second lever 6, and the rotational force at this time is transmitted to the second lever 6, causing the second lever 6 to rotate counterclockwise. ing.

On the other hand, when the second lever 5 is rotated counterclockwise from the state shown in FIG. The second auxiliary lever 12 is brought into contact with the second lever 6, and the rotational force at this time is transmitted to the second lever 6, causing the second lever 6 to rotate clockwise.

The first auxiliary lever 11 and the second auxiliary lever 12 at this time
The levers are of the same shape and are pivoted to pins 13 and 14, respectively, so that the inside of each bent portion faces the arm 5a or the arm 5b.

Further, the stopper 15 restricts the clockwise rotation of the second lever 60, and the stopper 16 restricts the counterclockwise rotation of the second lever 6.

Here, the operation of the operating mechanism of this embodiment will be explained in detail together with its operating mode.

When the opening/closing section is in a closed state, it is in a state as shown in FIG. 1a.

That is, the second lever 6 is restricted from rotating clockwise by the stopper 15.

In this state, when the drive source is driven to rotate the shaft 4 clockwise, the lever 5 also rotates clockwise integrally with this.

When the lever 5 rotates to a certain extent, the arm 5a engages with the first auxiliary lever 11, causing the first auxiliary lever 11 to rotate counterclockwise.

When the lever 5 further rotates clockwise toward the dead point, the first auxiliary lever 11. is the second lever 6
Since the second lever 6 comes into contact with the second lever 6, the rotational force at this time is also transmitted to the second lever 6.

Therefore, this second lever 6 gradually rotates counterclockwise, and at the same time gradually lowers the movable contact via the operating link 10.

This state is shown in FIG. Through this series of operations, the spring force charged in the spring 7 is released all at once when the dead point is exceeded, but the free left rotation of the lever 5 is restricted by the worm 2 via the shaft 4 and the worm wheel 3. Therefore, the second lever 6 rapidly rotates counterclockwise until it is regulated by the stopper 16 to follow the release of the spring force.

At the same time, the movable contactor is also rapidly lowered via the operation link 10 to complete the closing operation.

This state is shown in FIG. 1C. On the other hand, the shutoff operation can be performed by performing the reverse operation of the closing operation.

That is, the lever 5 is rotated counterclockwise from the closed state shown in FIG. 2a (same state as in FIG. 1C).

When the lever 5 rotates to a certain extent, the arm 5b engages with the second auxiliary lever 12 to rotate the second auxiliary lever 12 clockwise.

When the lever 5 continues to further rotate counterclockwise toward the dead point, the second auxiliary lever 12 comes into contact with the second lever 6, so the rotational force at this time is also transmitted to the second lever 6. be done.

Therefore, this second lever 6 is gradually rotated clockwise, and at the same time, the movable contact is also gradually raised via the operating link 10.

This state is shown in Figure 2. In this state, if the second lever 5 continues to rotate counterclockwise and exceeds the dead point, the spring force will be released in the same way as during the closing operation, so the second lever 6 will continue to rotate counterclockwise until it is regulated by the stopper 15. rapidly rotate in the direction.

Accompanying this, the movable contact is also rapidly raised via the operation link 10, and the disconnection operation is completed.

, this state is shown in FIG. 2C. That is, in the operating mechanism according to this embodiment, the second lever 6 is running toward a predetermined direction before the dead point is exceeded even in the closing and closing operations.

Further, in the above embodiment, the final stage of the drive system that applies rotational force to the shaft 4 to which the first lever 5 is fixed is the worm 2.
It was formed by a combination of and worm wheel 3,
It is not limited to this.

However, in this case, as long as the transmission shaft 1 is not rotated, the worm wheel 3, and by extension the lever 5, will not rotate freely, so a special locking mechanism is used to keep the opening/closing part closed and closed. becomes unnecessary.

Further, a similar function can be provided by forming the final stage of the drive system with a combination of a spur gear and a latch.

As specifically explained above in conjunction with the embodiments, according to the present invention, in any of the closing and closing operations, the second lever that directly applies the operating force to the operating link connected to the movable contact is activated by the spring force. Since the dust is rotated prior to rapid discharge and the dust has a certain initial velocity at the time of discharge of the spring force, extremely smooth and efficient closing/closing of the switch can be performed.

[Brief explanation of the drawing]

Figure 1 C1 Figure 2 C is a front view showing an embodiment of the present invention.
FIG. 1C and FIG. 2C show various aspects at the time of the closing operation, and FIGS. 2a to 2C show each aspect at the time of the shutoff operation, respectively. That is, Fig. 1a and Fig. 2C are the cut-off state, Fig. 1b and Fig. 2 are the state immediately before the dead point, Fig. 1C1 Fig. 2a
indicates the input state, respectively. In the drawing, 4 is the shaft, 5 is the lever, 5a and 5b are the arms, and 6
is a second lever, 7 is a spring, 10 is an operating link, 11 is a first auxiliary lever, and 12 is a second auxiliary lever.

Claims (1)

[Claims] 1 having a first lever having a base end fixed to a rotatable shaft and a second lever having a base end pivotally attached to the shaft;
A spring is installed between the distal end portions of the first lever and the second lever, and arms extending from both sides of the first lever in a direction perpendicular to the longitudinal direction are provided at the base end of the first lever. One end of the operating link connected to the movable contact of the opening/closing part is pivotally attached to the tip of the second lever, and the second lever is pivoted in one direction as the shaft rotates in one direction. An abbreviated-shaped second lever that engages one of the arms during rotation and also contacts the second lever, transmitting the rotational force to the second lever and causing the second lever to rotate in the opposite direction. 1
When the auxiliary lever rotates in the opposite direction as the shaft rotates in the opposite direction, the auxiliary lever engages with the other arm and comes into contact with the second lever to absorb the rotational force at this time. An operating mechanism for a switch, characterized in that it has a second auxiliary lever in the shape of an abbreviation that also transmits information to a second lever and rotates the second lever in the one direction.