JPH08298040A - Circuit breaker operating device and vacuum circuit breaker - Google Patents

Abstract

PURPOSE: To provide a small-sized, highly reliable. inexpensive circuit breaker operating device and a vacuum circuit breaker using it without using any independent, different shock absorber. CONSTITUTION: An operating lever 31 for opening and closing switch contacts 2, 3 by an operating shaft 8 has a cam device 35 for accumulating energy in a contact pressure spring 33 when the operating lever 31 is moved from closed position to open position, and since the cam device 35 acts on the contact pressure spring 33 while the operating lever 31 moves from the closed position to the open position to accumulate the energy in the contact pressure spring 33, the excess opening energy at opening is absorbed by the contact pressure spring so that the bounce of the contacts 2, 3 can be prevented. Accordingly, the bounce of the contacts at opening can be prevented without requiring the provision of a different shock absorber, and a small-sized. highly reliable, inexpensive operating device can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker operating device, and more particularly, to a circuit breaker operating device which is particularly suitable for operating a vacuum circuit breaker and which can absorb mechanical energy of a contact when the contact is opened. It relates to the vacuum circuit breaker that was used.

[0002]

14 to 17 show a vacuum circuit breaker which has been used so far, FIGS. 14 and 15 show an open state of the vacuum circuit breaker, and FIGS. 16 and 17 show a closed pole. It shows the state. In these drawings, a vacuum circuit breaker comprises a casing 1 which is an outer box, and a vacuum switch 4 which is provided in the casing 1 and has a fixed contact 2 and a movable contact 3 which can be brought into contact with and separated from each other. ing. The vacuum switch 4 is fixed to the casing 1 by terminals 5 and 6. The terminal 6 has a flexible conductor 7 so that the movable contactor 3 can be moved into and out of contact with the fixed contactor 2. The vacuum circuit breaker further has an operating shaft 8 which is a crossbar, and is provided with a vacuum switch 4 by a closing command or a trip command.
And a circuit breaker operating device 10 for connecting the operating shaft 8 to the vacuum switch 4 to open and close the vacuum switch 4. Circuit breaker operating device 10
Is provided with an operating lever 11 and a contact drive device 12, and the operating lever 11 is fixed to the operating shaft 8 and
16 is a lever that swings to the open position (FIG. 14) or the closed position (FIG. 16) to open or close the contactors 2 and 3, and the contactor drive device 12 includes an operating lever 11 that is closed in FIG. Has a contact pressure spring 13 for applying contact pressure between the contacts when in the position, and in combination with the operating lever 11,
The movement of the operating lever 11 is transmitted to the contacts 2 and 3 of the switch 4 to open and close the contacts.

The operating mechanism 9 includes a closing device and a tripping device (not shown) for performing various operations of the vacuum circuit breaker. On the operating shaft 8 of the operating mechanism 9, the movable contact 3 of the vacuum switch 4 is swung to the open position (FIG. 14) or the closed position (FIG. 16) by the rotation of the operating shaft 8 to move the movable contactor 3 to the open position (see FIG. 14) or an operating lever 11 for driving to the closed position (FIG. 16). The tip of the operation lever 11 has an operation rod 14 fixed to the movable contactor 3.
It is pivotally attached by a pin 16 to a bracket 15 which is slidably mounted on. An insulating flange 17 is also fixed to the other end of the operating rod 14.
A contact pressure spring 13 is provided on the operation rod 14 between the bracket 15 and the bracket 15 in a compressed state to apply a contact pressure between the contacts 2 and 3 when the operation lever 8 is in the closed position shown in FIG. .

The operating shaft 8 is further provided with a damper lever 18, and when the operating shaft 8 is in the position shown in FIG. 14, an oil damper 19 and a stopper 2 which are shock absorbers.
The operation shaft 8 and the operation lever 11 are prevented from rotating further clockwise than this position by abutting on 0.

When a closing command is given to the operating mechanism 9 while such a vacuum circuit breaker is in the open position shown in FIG. 14, the operating mechanism 9 moves the operating shaft 8 together with the operating lever 11 in the counterclockwise direction in FIG. Is rotated to the bracket 1
5, contact pressure spring 13, flange 17 and operating rod 14
The movable contactor 3 of the vacuum switch 4 is moved upward via.
Although the movable contact 3 eventually contacts the fixed contact 2 and cannot move further, the operating lever 8 continues to rotate counterclockwise and pushes the bracket 15 upward.
At this time, the flange 1 fixed to the operation rod 14
7 cannot move, so the bracket 15 is the operating rod 1
4 is slid to compress the contact pressure spring 13 to store energy, and a contact pressure is applied between the contacts 2 and 3 to reach the closed position shown in FIG.

When the trip command is given when the vacuum circuit breaker is in the closed position of FIG. 16, the operating mechanism 9 rotates the operating shaft 8 in the clockwise direction to move the bracket 15 via the operating lever 11. Pull it down as shown. The bracket 15 is engaged with the nut at the lower end of the operation rod 14 to operate the operation rod 1.
4 is pulled down to open the contacts 2 and 3 of the vacuum switch 4. Simultaneously with the rotating operation of the operation shaft 8, the damper lever 18 also rotates in the clockwise direction, first hits the oil damper 19 to absorb the energy, and then hits the stopper 20 to stop at the opening position in FIG.

[0007] Such an oil damper (shock absorber)
If 19 does not exist or if there is a failure, the above-described opening energy cannot be absorbed, and the damper lever 18 directly collides with the stopper 20, causing the damper lever 18 to bounce back due to the excess opening energy, and the operating shaft. 8
Is rotated in the closing direction, and the movable contactor 3 of the vacuum switch 4 approaches the fixed contactor 2. When such a phenomenon occurs, the separation distance between the contacts 2 and 3 becomes insufficient,
Failure of current interruption occurs, insulation breakdown occurs between contacts 2 and 3, and a flashover occurs. Even if the vacuum circuit breaker is in the open position, current continues to flow and arc energy destroys the vacuum circuit breaker. There is even something to do.

[0008]

As described above,
In the conventional vacuum circuit breaker, the shock absorber required to absorb the opening energy and prevent the rebound of the contact was provided as an independent and separate mechanism. Therefore, when viewed as a vacuum circuit breaker as a whole, the size of the device is increased and the price is increased. Also,
In a device that uses an oil damper as a shock absorber, this is one of the causes that causes failure as a vacuum circuit breaker because the opening energy is not absorbed due to oil leakage, etc.・ Maintenance work was required.

[0009]

Therefore, in the circuit breaker operating device according to the present invention, the switch having the movable contact between the open position and the close position is opened and closed by the operation shaft of the operation mechanism. A circuit breaker operating device for operating the operating lever, which is fixed to the operating shaft and swings to the open position or the closed position by the operating shaft to open or close the contactor, and the operating lever is in the closed position. And a contact drive device that has a contact pressure spring that applies a contact pressure between the contacts and that is combined with the operation lever to transmit the movement of the operation lever to the contact of the switch to open and close the contact. The operation lever is provided with a cam device which is combined with the contact drive device and stores energy in the contact pressure spring during movement of the operation lever from the closed position to the open position.

In the circuit breaker operating device according to the second aspect of the present invention, the contact drive device includes an operating rod connected to the contact and combined with the cam device of the operating lever, and the cam device is relative to the operating rod. And a fork portion slidably engaged therewith, and the contact pressure spring is arranged on the operating rod between the operating rod and the fork portion of the cam device.

In the circuit breaker operating device according to the third aspect of the present invention, the cam device is provided at the tip of the swinging operating lever, and contacts the operating lever at least at the end of the movement from the closed position to the open position. It has a cam shape that acts on the pressure spring.

In the circuit breaker operating device according to a fourth aspect of the present invention, there is provided a stopper for contacting the operating rod at a portion where the operating rod and the bifurcated portion are engaged with each other to limit radial movement of the operating rod. There is.

According to another aspect of the vacuum circuit breaker of the present invention, a casing, a vacuum switch provided in the casing, an operating mechanism having a vacuum switch operating shaft, and opening and closing the vacuum switch. The circuit breaker operating device according to claim 1.

[0014]

In the circuit breaker operating device according to the first aspect of the present invention, the cam device provided on the operating lever functions as the contact pressure spring of the contactor drive device while the operating lever moves from the closed position to the open position. Acts to store the contact pressure spring.

In the circuit breaker operating device according to the second aspect of the present invention, the forked portion of the cam device slidably engages the operating rod and simultaneously contacts the contact pressure spring.

In the circuit breaker operating device according to the third aspect of the present invention, the cam action acts on the contact pressure spring at least at the end of the movement of the operating lever from the closed position to the open position by selecting the cam shape of the cam device. To do.

In the circuit breaker operating device according to the fourth aspect, the stopper contacts the operating rod to limit the radial movement.

According to another aspect of the vacuum circuit breaker of the present invention, a cam provided on the operating lever while the operating lever moves from the closed position to the open position in response to the operation of the vacuum switch operating shaft of the operating mechanism. The device acts on the contact spring of the contact drive to store it.

[0019]

1 to 3 show a vacuum circuit breaker equipped with a circuit breaker operating device according to an embodiment of the present invention in an open position, and FIGS. 4 to 6 show the vacuum circuit breaker of the present invention. The instrument is shown in the closed position. The vacuum circuit breaker of the present invention includes a casing 1 which is an outer box, and a vacuum switch 4 which is provided in the casing 1 and has a fixed contact 2 and a movable contact 3 which can be brought into and out of contact with each other. The vacuum switch 4 is fixed to the casing 1 by terminals 5 and 6. The terminal 6 has a flexible conductor 7 so that the movable contactor 3 can be moved into and out of contact with the fixed contactor 2. The vacuum circuit breaker further has an operating shaft 8 which is a crossbar, and an operating mechanism 9 for opening and closing the vacuum switch 4 according to a closing command and a trip command, and a vacuum opening and closing by connecting the operating shaft 8 to the vacuum switch 4. The circuit breaker operating device 30 for opening and closing the device 4 is provided. The circuit breaker operating device 30 includes an operating lever 31 and a contact driving device 32.
Is a lever that is fixed to the operating shaft 8 and swings to the open position (FIG. 1) or the closed position (FIG. 4) by the operating shaft 8 to open or close the contactors 2 and 3; The device 32 has a contact pressure spring 33 that provides a contact pressure between the contacts 2 and 3 when the operating lever 31 is in the closed position of FIG.
The movement of 1 is transmitted to the contacts 2 and 3 of the switch 4 to open and close.

The operating mechanism 9 includes a closing device and a tripping device (not shown), which may be known devices, for operating various operations of the vacuum circuit breaker. On the operating shaft 8 of the operating mechanism 9, the movable contactor 3 of the vacuum switch 4 is swung to the open position (FIG. 1) or the closed position (FIG. 4) by the rotation of the operating shaft 8 to move the movable contact 3 to the open position (see FIG. 1) or an operation lever 31 for driving to the closed position (FIG. 4) is attached. In the illustrated example, the operation lever 31 is a member having a structure as shown in FIGS. 11 and 12, and the operation lever 31 is integrally formed on the operation shaft 8 having a polygonal cross section, and the cam device is provided at the tip thereof. I have 35.

The operating lever 31 is connected to a contact drive device 32 connected to the movable contact 3 by a cam device 35 at the tip. The contactor drive device 32 includes an operation rod 36 aligned and fixed to the movable contactor 3, and an operation rod 36.
A lock nut 37 with a washer provided near the upper end of
A lock nut 38 with a washer provided near the lower end of the operation rod 36 and a contact pressure spring 33 provided on the operation rod 36 between the two lock nuts 37 and 38 are provided. The contact pressure spring 33 has a lock nut 37 whose one end is on the upper side.
The contact pressure spring 33 and the lower stop nut 38 at the other end.
And the cam device 35 of the operation lever 31 inserted between the contact point and the contact point via the washer 40. In other words, the cam device 35 of the operation lever 31 is inserted between the lock nut 38 on the lower side and the contact pressure spring 33 to compress the contact pressure spring 33, and the cam device 35 is responsive to the rotational position of the operation lever 31. Operation rod 3
By the action of the cam device 35 that rotates with respect to 6, the distance between the lower stop nut 38 and the contact spring 33 can be changed to change the compression amount of the contact spring 33. As shown in FIGS. 11 and 12, the operating lever 31 is bifurcated by forming a groove 41 in the cam device 35 at the tip thereof, and this groove 41 is shown in FIGS. 1 to 6. Thus, the lower end of the operating rod 36 is received, and the lower end of the operating rod 36 is prevented from swinging.

As shown in detail in FIGS. 7 to 10, the cam device 35 provided at the tip of the operating lever 31 has a width dimension X larger than the width of the tip of the operating lever 31, and is substantially parallel to each other. A bulge having surfaces 42 and 43.
In the illustrated example, the cam surfaces 42 and 43 are actually curved surfaces that bulge slightly outward with an extremely large radius of curvature, and end portions 44 and 45 are formed on the cam surface 42 and the cam surface 43. Ends 46 and 47 are formed at the end. The cam surface 42 is in contact with the contact pressure spring 33 via a washer 40, and the cam surface 43 is in contact with the lower stop nut 38. The lengths of the cam surfaces 42 and 43 are set so that when the operation lever 31 is rotated to the contact opening position shown in FIGS. 1 and 8 and tilted with respect to the operation rod 36 of the contactor drive device 32, the operation rod 36 moves. The width measured in the axial direction is shown in Fig. 7.
The dimension Y is larger than the dimension X shown in FIG. At the open position, as shown in FIGS. 2 and 3, the stopper lever 48 fixed to the operating shaft 8 is provided.
Is in contact with the stopper 49 and prevents the operating shaft 8 from rotating further.

FIGS. 8 to 10 show the operating lever 31 when the circuit breaker operating device 30 is in the open position, between the open position and the closed position, and in the closed position. The positional relationship between the contactor drive device 32 and the contactor drive device 32 is shown in detail.

In FIG. 8, the tip of the operating lever 31 of the circuit breaker operating device 30 is in the open position in which the operating shaft 8 of the operating mechanism 9 tilts downward, and the cam device 35 of the operating lever 31 moves. It is rotated clockwise with respect to the operating rod 36, and the end portion 44 of the cam surface 42 and the end portion 47 of the cam surface 43 of the cam device 35 are in contact with the washer 40 and the lock nut 38, respectively. Therefore, the washer 40 is separated from the lock nut 38 by the dimension Y.
Is larger than the minimum width dimension X (FIG. 7) of the cam device 35. In this open position, the circuit breaker operating device is shown in FIGS.
In this state, the stopper 49 (FIG. 3) prevents further movement in the contact opening direction.

When a closing command is given to the operating mechanism 9 while the circuit breaker operating device 30 is in the open position, the operating shaft 8 is rotated by the operating mechanism 9 together with the operating lever 31 in the counterclockwise direction in FIG. Then, the cam surface 42 of the cam device 35 is tilted with respect to the operation rod 36 and pushes the movable contactor 3 upward through the washer 40, the contact spring 33 and the operation rod 36 to the intermediate position shown in FIG. .

At this intermediate position, the cam device 35 has its cam surfaces 42 and 43 substantially at right angles to the operating rod 36, and has the minimum width dimension X. In this embodiment, this dimension X is equal to the distance from the lower stop nut 38 on the operating rod 36 to the step 50 (FIGS. 8 and 9). The washer 40 on the operation rod 36 is prevented from moving further than this by the step 50. In this way, since the width of the cam device 35 is minimized at this position, the compression amount of the contact pressure spring 33 is also minimized.

When the operating lever 31 further rotates counterclockwise beyond the above-mentioned intermediate position and pushes up the movable contactor 3 via the contactor drive device 32, the movable contactor 3 eventually comes into fixed contact. Although the child 2 comes into contact with it and cannot move further, the operating lever 8 continues to rotate counterclockwise to apply an upward force to the washer 40. At this time,
Since the upper stop nut 37 fixed to the operation rod 36 cannot move, the washer 40 slides on the operation rod 36 to compress the contact pressure spring 33 to store energy, and the contact pressure between the contacts 2 and 3 is increased. To obtain the closed pole position shown in FIGS. 4 and 10. In this position, the cam surface 42 of the cam device 35 is
The end portion 45 of the washer 40 against the action of the contact spring 33.
Is pushing up.

When the trip command is given when the vacuum circuit breaker is in the closed pole position in FIG. 4, the operating mechanism 9 causes the operating shaft 8 to move.
At the same time, the operation lever 31 is rotated clockwise to gradually release the pressing force applied to the contact pressure spring 33 and return it to the intermediate position shown in FIG. In this position, the movable contactor 3 is the fixed contactor 2
Away from and the current is about to be cut off. After the operation lever 31 further rotates and exceeds the intermediate position, the operation rod 36 is pulled down by the cam surface 43 of the cam device 35 via the lower stop nut 38 in the drawing, and the contactor is completely removed. It is tried to move to the opening position of FIG.

As described above, the washer 4 is operated until the circuit breaker operating device 30 moves from the intermediate position to the opening position.
Cam device 35 inserted between 0 and the lock nut 38
Is rotated clockwise while moving downward in the figure as a whole, and the end portion 44 of the cam surface 42 and the end portion 4 of the cam surface 43 are rotated.
7, the washer 40 is stopped from the nut 38, and the contact pressure spring 33 is compressed to store energy. During this time,
The movable contactor 3 and the contact drive device 32, which are rapidly moved in the opening direction by the circuit breaker operating device 30, try to move further due to their inertial energy beyond the opening position at which they should stop. To do.

However, in the circuit breaker operating device 30 of the present invention, this contact opening energy causes the operating lever 31 to rotate and the cam device 35 to rotate. It is consumed to compress and store energy. Therefore, until the operating lever 31 moves from the intermediate position of FIG. 7 to reach the opening position of FIG.
9 is compressed by the dimension Y-Z which is obtained by subtracting the dimension Z from the dimension Y of FIG. 8, the opening energy is sufficiently absorbed by the contact spring 33, and the stopper lever 48 shown in FIG. 3 bounces even if it hits the stopper 49. Since there is no such a case and the contact can be prevented from rebounding when the contact is opened, it is not necessary to provide a separate shock absorber, and the operating device is small, highly reliable, and low in cost.

11 and 12 are perspective views showing the operating lever 31 of the circuit breaker operating device 30 of the present invention together with other related parts. In FIG. 11, three operating levers 31 are provided at intervals on the operating shaft 8 of the operating mechanism 9. On the operation shaft 8 having a long polygonal cross section, an operation lever 31 integrally formed is adapted to rotate integrally with the operation shaft 8. Flange members 51 are integrally formed on both sides of the operation lever 31.

The bifurcated portion formed by the groove 41 on the cam device 35 of the operating lever 31 is slidably engaged with the operating rod 36 between the lock nut 38 and the washer 40 on the lower side of the operating rod 36. The cam device 35 is in contact with the contact spring. In this way, the bifurcated portion of the cam device 35 slidably engages the operation rod 36 and contacts the contact pressure spring 33, supports the operation rod 36 from both sides, and connects the contact spring 33 to the bifurcated portion. I will support you in terms. Therefore, the positional relationship between the cam device 35 and the operation rod 36 is stable, and the assembly is easy. Further, the contact relationship between the cam device 35 and the contact pressure spring 33 is stable, and the reliability of the operating device of the circuit breaker can be increased.

As best shown in FIG. 13, the circuit breaker operating device 30 of the present invention is further supported at one end by a structural member such as the casing 1 of the breaker and at the other end by an operating rod 36.
A rod-shaped stopper 52 is provided which is in contact with the operating rod 31 at a portion where the fork and the bifurcated portion (groove 41) of the cam device 35 are engaged with each other and which restricts the radial deflection or movement of the operating rod 36. The stopper 52 abuts against the limited operation rod 36 from the opening side of the groove 41 to limit the movement of the operation rod 36 in the radial direction toward the opening side. Since the stopper 52 is provided, the operation rod 36
It is possible to limit the deflection of the shaft center of, and to improve the operational reliability with a simple configuration.

[0034]

The circuit breaker operating device according to claim 1 is
A circuit breaker operating device for opening and closing a switch having a movable contact between an open position and a closed position by an operation shaft of an operation mechanism, the circuit breaker operating device being fixed to the operation shaft and opened or closed by the operation shaft. An operating lever that swings to the closed position to open or close the contactor, and a contact pressure spring that applies contact pressure between the contactors when the operating lever is in the closed position, combined with the operation lever, A contactor drive device that transmits the movement of the operation lever to the contactor of the switch to open and close the contactor, and the operation lever is combined with the contactor drive device to move the operation lever from the closed position to the open position. Since the cam device that stores energy in the contact pressure spring during movement is provided, while the operation lever moves from the closed position to the open position, the cam device provided on the operation lever acts as the contact pressure spring for the contact drive device. Acting to store the contact pressure spring The surplus energy at the time of opening is absorbed by the contact pressure spring, the rebounding of the contactor at the time of opening the contact can be prevented, there is no need to provide a separate shock absorber, and the operating device is small, highly reliable, and inexpensive. it can.

In the circuit breaker operating device according to the second aspect of the present invention, the contact driving device includes an operating rod connected to the contact and combined with the cam device of the operating lever, and the cam device is provided with respect to the operating rod. Since the forked spring is disposed on the operating rod between the operating rod and the forked portion of the cam device, the forked portion of the cam device slides on the operating rod. The cam device and the operating rod are movably engaged and come into contact with the contact pressure spring, so that the positional relationship between the cam device and the operation rod is stable, and the assembly is easy, and the contact relationship between the cam device and the contact pressure spring is stable. The reliability of the operating device can be increased.

In the circuit breaker operating device according to the third aspect of the present invention, the cam device is provided at the tip of the oscillating operating lever, and is contacted at least at the end of the movement of the operating lever from the closed position to the open position. Since the cam device acts on the pressure spring, the cam device is provided on the tip of the swinging operation lever and acts on the contact spring at least at the end of the movement of the operation lever from the closed position to the open position. Therefore, it is possible to prevent the rebound of the contactor by absorbing the opening energy immediately before the opening operation is completed without hindering the contactor opening operation.

In the circuit breaker operating device according to a fourth aspect of the present invention, there is provided a stopper that abuts the operating rod at a portion where the operating rod and the forked portion are engaged with each other and limits the radial movement of the operating rod. Therefore, since a stopper is provided that abuts the operating rod at the portion where the operating rod and the bifurcated portion engage with each other and limits the radial movement of the operating rod, it is possible to limit the deflection of the axial center of the operating rod. It is possible to improve the operation reliability with a simple configuration.

In the vacuum circuit breaker according to a fifth aspect of the present invention, a casing, a vacuum switch provided in the casing, an operating mechanism having a vacuum switch operating shaft for opening and closing the vacuum switch, Since the circuit breaker operating device according to claim 1 is provided, the cam device provided on the operating lever acts on the contact pressure spring of the contact drive device while the operating lever moves from the closed position to the open position. Since the contact pressure spring stores energy, excess energy at the time of opening is absorbed by the contact pressure spring, the rebound of the contacts of the vacuum switch when the contact is opened can be prevented, and a separate buffer is provided for the circuit breaker operating device. There is no need to install a device, the vacuum circuit breaker is small and highly reliable, and the cost can be reduced.

[Brief description of drawings]

1 is a schematic side cross-sectional view taken along the line AA of FIG. 2 showing a state in which a vacuum circuit breaker using a circuit breaker operating device according to an embodiment of the present invention is in an open position.

FIG. 2 is a schematic front view of the vacuum circuit breaker of FIG.

3 shows a stopper of the vacuum circuit breaker of FIG. 1,
FIG. 3 is a schematic side cross-sectional view taken along the line BB of FIG. 2.

FIG. 4 is a schematic side cross-sectional view taken along the line CC of FIG. 5, showing a state in which the vacuum circuit breaker using the circuit breaker operating device of the embodiment of the present invention is in the closed position.

5 is a schematic front view of the vacuum circuit breaker of FIG.

6 shows a stopper of the vacuum circuit breaker of FIG. 4,
FIG. 6 is a schematic side cross-sectional view taken along the line DD of FIG. 5.

FIG. 7 is a side view showing an operating lever of the circuit breaker operating device of the present invention.

FIG. 8 is a side view showing the operating lever and the operating rod of the circuit breaker operating device of the present invention in the open position.

FIG. 9 is a side view showing the operating lever and the operating rod of the circuit breaker operating device of the present invention in an intermediate position.

FIG. 10 is a side view showing the operating lever and the operating rod of the circuit breaker operating device of the present invention in the closed position.

FIG. 11 is a perspective view showing an operating lever integrally formed with an operating shaft of the circuit breaker operating device of the present invention.

FIG. 12 is an exploded perspective view showing an operation lever and a flange, which are originally integrated, in order to make the operation lever portion of FIG. 11 easy to understand.

FIG. 13 is a schematic side sectional view showing a stopper of the circuit breaker operating device of the present invention.

FIG. 14 is a line E- of FIG. 15 showing a state in which the vacuum circuit breaker using the conventional circuit breaker operating device is in the open position.
It is a schematic side sectional drawing along E.

FIG. 15 is a schematic front view of the vacuum circuit breaker of FIG.

FIG. 16 is a line F- of FIG. 17 showing a state in which the vacuum circuit breaker using the conventional circuit breaker operating device is in the closed pole position.
It is a schematic side sectional drawing along F.

FIG. 17 is a schematic front view of the vacuum circuit breaker of FIG. 16.

[Explanation of symbols]

1 casing, 2 and 3 contactor, 4 switch, 8 operating shaft, 9 operating mechanism, 30 circuit breaker operating device, 31
Operating lever, 32 contact drive device, 33 contact spring,
35 cam device, 36 operation rod, 41 groove, 49
Stopper

Claims (5)

[Claims] 1. A circuit breaker operating device for opening and closing a switch having a movable contact between an open position and a closed position by an operation shaft of an operation mechanism, the circuit breaker operating device being fixed to the operation shaft. It has an operating lever that swings to an open position or a closed position by a shaft to open or close the contactor, and a contact pressure spring that applies a contact pressure between the contactors when the operation lever is in the closed position. A contact drive device that is combined with the operation lever to transmit the movement of the operation lever to the contactor of the switch to open and close the contactor, wherein the operation lever drives the contactor. A circuit breaker operating device comprising a cam device, which is combined with a device to store energy in the contact pressure spring during movement of the operating lever from the closed position to the open position. 2. The contact drive device comprises an operation rod connected to the contact and combined with the cam device of the operation lever, the cam device slidably engaged with the operation rod. 2. The circuit breaker operating device according to claim 1, further comprising a forked portion, wherein the contact pressure spring is arranged on the operating rod between the operating rod and the forked portion of the cam device. 3. A cam shape provided on the tip of the swinging operation lever, and acting on the contact pressure spring at least at the end of the movement of the operation lever from the closed position to the open position. The circuit breaker operating device according to claim 1 or 2. 4. The circuit breaker operation according to claim 2, further comprising a stopper that abuts on the operation rod at a portion where the operation rod and the bifurcated portion are engaged with each other to limit radial movement of the operation rod. apparatus. 5. A circuit breaker operating device according to claim 1, further comprising a casing, a vacuum switch provided in the casing, a vacuum switch operating shaft, and an operating mechanism for opening and closing the vacuum switch. Vacuum circuit breaker with and.