JPH0877892A - Operation mechanism of vacuum switch - Google Patents

Abstract

PURPOSE: To provide a necessary contact pressure characteristic by a small contact pressure spring even in the case of a vacuum switch or the like having large current capacity by providing the contact pressure spring to make a spring load act in the outgoing direction of a toggle link device on the basis of supplied operation force. CONSTITUTION: Contact pressure boosting power is constituted in the proper magnitude in the vicinity where a movable contactor 3 comes into contact with a fixed contactor 1 so that a first link 10 and a second link 11 constituting a toggle link 9 become an almost straight line shape while maintaining an angle of a nonreverse degree. When an operation rod 15 operates leftward, a contact pressure spring 9 is started to be more compressed than an initial compression condition. Simultaneously with this, a load is enlarged by a toggle boosting effect while increasing the load, and operates a prescribed contact pressure stroke to become a necessary value, and closing operation is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in the operating mechanism of vacuum switches.

[0002]

28 is a side sectional view showing the structure of a conventional vacuum switch, and FIG. 29 is a front view thereof. In the figure, the insulating frame 107 is fixed to the carriage 110. The vacuum switch tube 101 has an upper main circuit conductor 106.
The movable contactor 103 is fastened to the insulating frame 107 together with the flexible contact 104, and
8 is connected. The insulating rod 105 and the pressure contact device 109 are connected to the movable contact 103 of the vacuum switch tube 101. The drive lever 111 is configured by integrally forming a three-phase lever 111a and a common lever 111b. The three-phase lever 111a is provided for each phase in a direction perpendicular to the plane of the drawing, and a supported and fixed shaft 112 is provided. Rotate around the center.
The pressure contact device 109 for each phase is connected to the right end of the three-phase lever 111a, and the operating rod 1 is connected to the left end of the common lever 111b.
The operation device 114 is connected via 13. The illustrated state is a closed state of the vacuum switch.

Next, the operation of opening the main circuit from the illustrated closed state will be described. First, the operation device 114 operates in response to a signal from a control device (not shown). The operation rod 113 is pulled up in accordance with the operation of the operation device 114, and the drive lever 111 starts rotating in the clockwise direction. Along with this, the movable end (lower end) of the contact pressure spring 109 is pulled downward. In this initial state, the movable contactor 103 is still pressed upward by the upper end of the contact pressure spring 109 together with the insulating rod 105, and thus is stationary. Subsequently, the operation of the reverse stroke of the contact pressure stroke is performed, and at the same time, the movable contactor 103 starts the lowering operation to start the fixed contactor 102.
Separated from After continuing the operation, the final position is reached and the opening operation is completed.

Next, the closing operation from the open state will be described. First, the operating device 114 operates to operate the operating rod 11
3 moves downward. As a result, the drive lever 1
11 rotates counterclockwise to contact pressure spring 109, insulating rod 1
05 and the movable contactor 103 operate in the opposite direction to the opening operation. In the contact pressure stroke near the end of the closing operation, the contact portion 103a of the movable contactor 103 becomes the contact portion 1 of the fixed contactor 102.
02a. At the same time, the spring force of the contact pressure spring 109, which is compressed and set to a high load of several hundreds of kilograms, and the impact force at the time of contact directly act in the direction in which the closing operation of the operating device 114 is hindered. Therefore, the operating device 114 overcomes this large load and continues to operate, and while the load is increased, the operating device 114 carries out the contact pressure stroke of the movable contactor 103 to complete the closing operation.

[0005]

In the conventional vacuum switch having the above-described structure, the contact pressure load on the contact is increased as the current is increased. Moreover, in addition to this contact pressure load, an impact load is generated in the vicinity of the final stroke of the closing operation, so a large operating force is required to overcome these and still apply. Therefore, a large operating device is inevitably required. Further, a switch for high voltage requires a high closing speed, and therefore the fixed contact 102 and the movable contact 10 are required.
An increasing impact load is generated during contact between points 3 and 4. As a result, a collision vibration is generated between the contacts for a while, and contact and opening are transiently repeated, after which the final closing state is reached. In this way, each contacting operation causes plastic deformation of the contact portion due to the impact load, which accelerates wear again, and the contact pressure load is greatly reduced after opening and closing a large number of times. In addition, since it is ignited by collision vibration, it is consumed at an accelerating rate, accompanied by welding of contacts, and in the worst case, there is a risk that it cannot be opened.

The present invention has been made in order to solve the above-mentioned problems. Even in the case of a vacuum switch or the like having a large current capacity that requires a high contact pressure load, the contact force required by a contact pressure spring smaller than the conventional one is required. The purpose is to obtain pressure characteristics. Another object is to make it possible to set the final closing operation speed of the movable contactor to be low. Moreover, it aims at reducing the maximum operation load of an operating device and making an operating device small. Moreover, it aims at providing the operating device excellent in the certainty and stability of operation. Moreover, it aims at improving an open characteristic.

[0007]

In the operating mechanism of the vacuum switch according to the present invention, the output end of the toggle link device is connected to the insulating rod connected to the movable contact, and the input end of the toggle link device is connected. When the operating means is engaged with the operating means and the operating means operates in the direction to extend the toggle link device, the contact pressure including the spring to be stored in the power transmission path from the operating means to the input end portion. Equipped with equipment.

Further, a toggle link device connected to the insulating rod is provided with the other end of the first link having one end connected to the insulating rod.
The other end of the second link having one end as a fixed fulcrum is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the open state of the vacuum switch tube, and in the closed state of the vacuum switch tube. Configured as a device having a substantially linearly extended shape, and engaging a movable input point,
An operating rod that drives the toggle link device by operating in a substantially linear manner, and when the operating rod operates in a direction to extend the toggle link device, energy is stored via the power transmission path from the operating rod to the movable input point. And a contacting device including a spring to be operated.

Further, the operating rod is arranged in an angle range sandwiched by the first link and the second link.

Further, a stopper for limiting the rotation of the first link or the second link within a predetermined range is provided.

A guide link is provided, the other end of which rotates with one fixed end as a fulcrum and which is connected to the end of the insulating rod.

Further, the operating rod is configured to engage with the connecting point on the second link.

Further, a holding member having a hole for holding the connecting pin connecting the insulating rod and the other end of the first link slidably only in the operation stroke direction of the movable contact is provided.

Further, there is provided an operation rod having a hole into which the movable input point of the toggle link device is loosely fitted and having a guide portion for directly driving the movable input point in the opening direction of the vacuum switch by the hole end wall portion. .

Further, an operation lever is provided which engages with the movable input point of the toggle link device and rotates to drive the toggle link device.

Further, one end of the second link, which is a floating fulcrum, is provided on the rotating operation lever.

Further, at the initial position of the contact pressure stroke of the movable contact, a floating fulcrum is provided at a position deviating from the line segment connecting the rotation fulcrum of the operating lever and the movable input point.

In addition, the other end of the first arm whose one end is pivotally attached to the movable contact side movable member and the other end of the second arm whose one end is pivotally supported by a fixed pin are provided. A toggle link device which is rotatably loosely connected to each other and whose connecting position is a bending connection point, and a contact pressure including a spring to be accumulated by relative movement of the bending connection point within the loose fitting connection range. A device and operating means connected to the toggle link device were provided.

In addition, the other end of the first arm whose one end is axially attached to the movable member on the movable contact side and the other end of the second arm whose one end is axially supported by the fixing pin are The other end of the second arm portion is rotatably and loosely connected to each other via a connecting pin inserted into a guide hole formed with a predetermined directionality,
A toggle link device with the position of the connecting pin as a bending connecting point, a contact pressure device including a spring to be stored by relative movement of the connecting pin in a guide hole, and an operating means connected to the toggle link device. And provided.

The guide hole locks the connecting pin at one end of the guide hole until the start of the contact pressure process at the time of turning on the vacuum switch tube, and moves the connecting pin in a predetermined direction as the contact pressure process progresses. The connecting pin is configured to have a hole shape so that the connecting pin is stopped at an intermediate position where a gap is formed between the connecting pin and the other end when the vacuum switch tube is closed.

Further, one end is axially attached to the movable contact side movable member, the first link having the output point at the axial attachment point, one end is axially supported by a fixed pin, and the other end is provided with a predetermined direction. Connected to the other end of the first link through a connecting pin inserted in the guide hole and a drive lever having a guide hole formed so that the output point and the connecting pin are connected in the open state of the vacuum switch tube. A second link pivotally supported at a predetermined point on the drive lever that is on a substantially extended line of the straight line and at which a straight line connecting the connecting pin and the fixed pin has a predetermined angle with respect to the extended line; A contacting device including a spring to be stored by relative movement of the connecting pin in the guide hole, and an operating means connected to the drive lever,
Was set up.

Further, in the closed state of the vacuum switch tube, the internal angle formed by the straight line connecting the output point and the connecting pin and the axis acting on the spring is set to be larger than a right angle and smaller than 180 degrees.

Further, in the closed state of the vacuum switch tube, the straight line connecting the output point and the connecting pin and the axial line on which the spring acts are arranged in a substantially straight line.

The predetermined angle is set to be larger than a right angle and smaller than 180 degrees in the initial state of the pressure contact step.

The predetermined angle is smaller than a right angle and larger than 0 degree in the initial state of the pressure contact step.

Further, one end is axially attached to the movable member on the movable contact side, the first link having the axial attachment point as an output point, and one end is pivotally supported by a fixed pin, and the other end is provided with a predetermined direction. Drive lever that has a guide hole formed to have the property of being formed, and is connected to the other end of the first link through a connecting pin that is inserted into the guide hole to form a toggle link, and one end of which is pivotally supported by the fixed pin. The spring receiving member provided at a position angularly displaced in the rotation direction of the drive lever, one end of which is pivotally supported by the connecting pin, and the other end of which is held slidably in the axial direction with respect to the spring receiving member. Connected to the spring guide, the contact pressure spring sandwiched between the connecting pin and the spring receiving member along the spring guide, the stopper that stops the rotation of the spring receiving member from the start of the pressure contact process of the vacuum switch tube, and the drive lever The operating means is provided.

Further, in the closed state of the vacuum switch tube, the output point, the connecting pin and the fixing pin are arranged in a substantially straight line, and the contact pressure spring urges the connecting pin in a direction corresponding to the opening direction of the vacuum switch tube. Configured to do so.

Further, the spring guide is composed of at least two axially separated members screwed together.

The other end of the spring receiving member is supported by a supporting member whose length is adjustable.

Further, one end is pivotally attached to the movable member on the movable contact side, the first link whose output point is the pivotal attachment point, and one end is pivotally supported by a fixed pin, and the other end has a predetermined direction. And a drive lever connected to the other end of the first link via a connecting pin inserted in the guide hole, and a spring receiving member provided on the drive lever, A spring guide having one end connected to the connecting pin and the other end held slidably in the axial direction with respect to the spring receiving member, and a contact spring held between the connecting pin and the spring receiving member along the spring guide. And an operating means connected to the drive lever.

Further, the guide direction of the guide hole is configured to have a predetermined angle in the range from 0 degree to a right angle with respect to the straight line connecting the connecting pin and the fixing pin.

Further, one end is axially attached to the movable member on the movable contact side, the first link having the axial attachment point as an output point, and one end is axially supported by a fixed pin and the other end is provided in a predetermined direction. Between the drive lever connected to the other end of the first link via the connecting pin inserted in the guide hole and the connecting pin and the frame of the vacuum switch. A contact device that is connected and that generates contact pressure according to the position of the connecting pin, and an operating means that is connected to the drive lever are provided.

Further, the pressure contact device is configured to be connected to the connecting pin via the thrust link arranged so as to have a predetermined angle with respect to the drive lever when the vacuum switch tube is closed.

Further, in the pressure contact device, the pressure contact spring is biased by the spring link whose one end is pivotally supported, and the connection point between the thrust link and the spring link is the position where the spring link is pivotally supported and the spring link. It is configured to be at an intermediate point between the engagement point position of the contact pressure spring and the contact point spring.

In the pressure contact device, the pressure contact spring is biased by a spring link whose one end is pivotally supported, and the engagement point position between the spring link and the pressure contact spring is the connection point between the thrust link and the spring link. And the axially supported position of the spring link, the axial line of the thrust link is shorter than the axial line of the drive lever, and the rotational position viewed from the connecting pin is substantially the same.

Further, one end is axially attached to the movable member on the movable contact side, the first link having the output point at the axial attachment point, and one end is axially supported by a fixed pin and the other end is provided in a predetermined direction. A drive lever connected to the other end of the first link via a connecting pin inserted into the guide hole, and a thrust link connected to the connecting pin at one end. , One end of which is connected to a fixed portion of the vacuum switchgear and the other end of which is connected to the other end of the thrust link, and which forms a V-shape with the thrust link, and the position of the connecting pin that engages with the spring link. A contact pressure device for generating a contact pressure according to the above, and an operation means connected to the drive lever are provided.

Further, the other end of the first arm portion, one end of which is pivotally attached to the movable contact side movable member of the vacuum switch tube, and the other end of the second arm portion, one end of which is axially supported by the fixing pin. Part and
A toggle link device that is rotatably connected to each other and has its connecting position as a bending connecting point, an operating means connected to the toggle link device, and a bending connecting point, and the degree of bending of the toggle link device is a predetermined angle. A contact pressure device having a contact pressure spring that applies a spring load in the output direction of the toggle link device based on the operation force supplied from the operation means when opened.

[0038]

The toggle link device multiplies the operating force by the toggle effect and lowers the final closing operation speed of the movable contact. The contact pressure device applies a force to be a source of contact pressure to the toggle link device from a predetermined time when the vacuum switch is turned on.

Further, the toggle link device has a bent shape when the vacuum switch tube is open, and has a shape that extends substantially linearly when the vacuum switch tube is closed, so that the speed at the time of contact of the contacts can be increased. A large contact pressure is applied to the movable contact while being reduced. The operating rod transmits the driving force to the toggle link device via the pressure contact device when the operating rod is turned on.

Further, the operating rod arranged in the angle range sandwiched by the first link and the second link drives the toggle link device in a space-saving arrangement.

Further, the stopper prevents the toggle link from being reversed.

Further, the guide link laterally supports the movable contactor.

Further, the second link having the connecting point for engaging the operation rod matches the difference in operation process between the toggle link device and the operation mechanism thereof.

The holding member holds the connecting pin slidably only in the operation stroke direction of the movable contact.

The guide portion of the operating rod drives the toggle link device when the vacuum switch is opened, and applies a predetermined spring load as a contact pressure within the range of the length of the hole provided when the vacuum switch is opened. Therefore, the driving force is transmitted through the pressure contact device.

Further, the operation lever that rotates to drive the toggle link device engages with the movable input point of the toggle link device and rotationally drives it.

Further, the structure in which one end of the second link, which is a floating fulcrum, is provided on the rotating operation lever causes the toggle link device to change the toggle magnification unevenly according to the rotation of the operation lever. .

At the initial position of the contact pressure stroke of the movable contact, the floating fulcrum provided at a position deviating from the line segment connecting the rotation fulcrum of the operating lever and the movable input point has a large contact pressure in the contact pressure step. A configuration that increases or a configuration that does not increase much is achieved by a slight movement of the fulcrum position.

When the toggle link extends to a predetermined position, the first arm portion and the second arm portion, which are loosely fitted and connected to each other, further move the connecting pin relative to each other within the loose fitting range so that the toggle link is further moved. It is extended, and thereby the spring is stored to reach a predetermined contact pressure.

The guide hole locks the connecting pin until the start of the contact pressure process, and after the start of the contact pressure process, the connecting pin is guided in a predetermined direction to store the spring and reaches a predetermined contact pressure.

The guide hole holds the connecting pin until the start of the pressure contacting process, and guides the connecting pin along a predetermined direction as the pressure contacting process progresses. Hold the connecting pin in the middle of the guide hole in the final loading state.

The second link transmits the driving force applied to the drive lever to the connecting pin, and after the contact pressure step is reached, the second link moves in the direction opposite to the first link around the fulcrum provided on the drive lever. The spring is rotated to store energy in the spring to reach a predetermined contact pressure.

By keeping the angle defining the bending degree of the toggle link in the closed state to less than 180 degrees,
There is always latent force in the opening direction on the first link.

On the contrary, by setting the angle defining the bending degree of the toggle link in the closed state to approximately 180 degrees,
Maintain a stable loading state.

By making the angle formed by the axis of the second link with respect to the line of action of the spring of the pressure contact device larger than a right angle,
A characteristic is obtained in which the contact pressure load in the contact pressure step is relatively increased when the closing operation is completed.

On the contrary, by making the angle smaller than the right angle, it is possible to obtain a characteristic that the contact pressure load in the contact pressure step is relatively reduced at the completion of the charging operation.

The spring receiving member stopped by the stopper and the spring guide connected to the connecting pin that slides in the guide hole after the pressure contact step store the contact pressure spring held therebetween.

In the closed state, the contact pressure spring applies a component force to the connecting pin in the direction of bending the toggle link (opening the vacuum switch tube).

The at least two axially separated members forming the spring guide change the timing at which the contact pressure first acts by adjusting the screw engagement thereof.

When the length of the supporting member is adjusted, the supporting position of one end of the spring receiving member changes.

The drive lever serves as a base for holding the spring receiving member, the spring guide and the contact pressure spring, and the contact pressure spring stores energy by the movement of the connecting pin guided in the guide hole.

The guide hole for guiding the connecting pin provides a contact pressure process characteristic according to the angular displacement of the guide direction with respect to the reference line.

The pressure contact device, one end of which is fixed to the frame of the vacuum switch, reduces the equivalent movable weight.

The thrust link arranged at a predetermined angle with respect to the drive lever transmits the acting force of the contact pressure spring to the connecting pin as a large contact pressure. In addition, the opening drive component force is always applied to the connecting pin even after the closing.

With respect to the fulcrum position, the spring link in which the action point of the contact pressure spring is provided farther from the connection point with the thrust link increases the action force of the contact pressure spring and transmits it to the thrust link.

If a thrust link having an axis shorter than the axis of the drive lever is provided on the axis of the drive lever and connected to the end of the spring link, the space occupied by the thrust link and the pressure contact device is reduced.

When the thrust link and the spring link form a V-shape, the contact pressure load of the contact pressure spring becomes very large and is transmitted to the connecting pin. In addition, the contact pressure load can be easily adjusted.

The contact pressure device connected to the bending connecting point applies a spring load in the output direction of the toggle link device by the operating force supplied from the operating means when the bending degree of the toggle link device opens to a predetermined angle or more. Let

[0069]

【Example】

(Embodiment 1) FIG. 1 and FIG. 2 are side views showing states of an operating mechanism of a vacuum switch according to Embodiment 1 at the time of opening and at the time of closing, respectively. In the figure, the vacuum switch tube 1 is
It is fastened to the insulating frame 107 together with the upper main circuit conductor 106. The fixed contactor 2 and the movable contactor 3 of the vacuum switch tube 1 are arranged so that their respective contact portions 2a and 3a are brought into abutting contact with each other, and the operation of the movable contactor 3 causes the contactor portions 2a and 3a to move to each other. Contact or separate. The flexible conductor 4 follows the movement of the movable contact 3 and connects the movable contact 3 and the main circuit conductor 108.
The insulating rod 5 made of an insulating material and coupled to the lower end of the movable contactor 3 insulates the main circuit portion from the ground. One end of the guide link 6 is rotatably supported by a fulcrum 7 fixed to a part 51 of the frame of the vacuum switch, and the other end is an insulating rod at a connecting pin (hereinafter simply referred to as a floating connecting point) 8 of a floating connecting point. It is connected with 5. The first link 10 and the second link 11 are connected in an inverted V shape to form the toggle link 9. The upper end of the first link 10 can rotate about the floating connection point 8, and the lower end of the second link 11 can rotate about the fulcrum 12. In addition, the operating rod 15 connected to the operating device 14 is connected to the connecting pin (hereinafter simply referred to as a bending connecting point) 13 of the inverted “U” -shaped bending connecting point between the first link 10 and the second link 11. It is connected to the right end via a pressure contact device 16. The pressure contact device 16 includes a left spring seat 17 and a right spring seat 1
8 and guide portions 20 and 21 are formed on both spring seats, respectively. The guide portions 20 and 21 hold the contact pressure spring 19 which is a compression spring, and the operation rod 15
A shaft 22 fastened at its right end so that its length can be adjusted is configured to pass through the contact pressure spring 19.

A guide portion 15a is provided in the middle of the shaft 22, and a guide hole 23 is formed in the guide portion 15a so as to be loosely engaged with the bending connecting point 13. The length of the guide hole 23 in the axial direction (horizontal direction in the figure) is formed to be slightly longer than the length corresponding to the stroke so that the guide hole 23 can slide in the stroke corresponding to the wipe amount of the contact. In the illustrated state, the contact pressure spring 19 has its length regulated by a right spring seat 18 provided at the right end of the shaft 22 and a left spring seat 17 locked at the bending connection point 13. That is, the bending connection point 1 is formed on the left end wall of the guide hole 23.
The load of the contact pressure spring 19 is designed so as to retain a predetermined initial contact pressure in the initial compressed state in which 3 is in contact.
In the closed state, as shown in FIG. 2, the bending connecting point 13 is located at a position on the right side of the guide hole 23, and is designed so that a slight proper gap is left.

Next, the operation of the first embodiment will be described. FIG. 1 shows an open state of the vacuum switch, and a case where the closing operation is performed will be described. In the figure, first, the operating device 14 operates in response to a closing command from a control device (not shown). Then, the three-phase shaft 25 connected to the operating device 14 rotates clockwise. The three-phase axis 25 is an axis extending in the direction perpendicular to the plane of the drawing.
The three-phase shaft 25 is provided with a lever 26 corresponding to each phase vacuum switch tube 1 for operating the vacuum switch tube 1. When the clockwise rotation of the three-phase shaft 25 is transmitted to the lever 26, the operation rod 15 connected to the lever 26 starts a substantially linear movement in the left direction in the drawing. Along with this, power is transmitted to the spring seat 17, the contact spring 19, and the spring seat 18, and the bending connecting point 13 almost follows the operating rod 15 and moves to the left. This causes the second lever 11 to rotate counterclockwise about the fulcrum 12. Further, the first lever 10 rotates in the clockwise direction with the floating connecting point 8 of the guide link 6 that rotates about the fulcrum 7 as the center of rotation. In this way, the degree of bending of the inverted V shape formed by the first lever 10 and the second lever 11 changes in the direction of decreasing (direction of extending the bending), so that the floating connecting point 8 is connected. The movable contact 3 moves together with the insulating rod 5 in the closing direction.

In the initial stage of the above-described closing operation,
The operation load is the movable weight and the spring in the initial compression state, and both are small. Therefore, the degree of flexing of the toggle link 9 is increased to maximize the speed-up effect and accelerate quickly by a small operation stroke of the operation device 14 so that the speed becomes a required speed in a short time. In the vicinity where the movable contact 3 finally comes into contact with the fixed contact 1 after further operation, the first link 10 and the second link 11 forming the toggle link 9 form a substantially linear shape with an angle not to be reversed. In this way, the contact pressure booster is configured to have an appropriate magnitude. Further operating rod 15
Is operated to the left, the contact pressure spring 19 starts to be further compressed from the initial compressed state. Then, as the load increases along with this, the load is expanded by the toggle boosting effect, and a predetermined contact pressure stroke that should be a required value is operated to complete the closing operation (FIG. 2). In the contact stroke in the closing operation, in the process of compressing the contact pressure spring 19 by the operation device 14, the contact pressure spring compression load, which occupies the largest specific gravity of the operation load, is reduced to a fraction by the toggle link effect. The load increase that is outstanding disappears and the load is leveled as a whole. Therefore, the impact at the time of contact with the contacts is greatly reduced, and the operation becomes smooth.

In the above structure, the first link 10 and the second link 11 have substantially the same length, and the inclination angles of the first link 10 and the second link 11 with respect to the horizontal direction are substantially the same. With such a configuration, the characteristic that the contact pressure acting on the contact point is expanded to the product obtained by multiplying the contact pressure spring load by the contact pressure booster is most effectively used, and the toggle link effect is maximized. In addition, the maximum stroke in the same space can be obtained. Also, the change in bending angle (the smaller angle formed by both links) is 0 to 1.
It can be within 80 degrees, but when operating from the open position side (when bent most) to the loading position side,
In practice, it is difficult to start due to friction, so it is desirable to set the angle with a margin in consideration of the friction angle.
In addition, a stopper 24 or a reversal preventing means may be provided on both outer sides of the opening and closing positions in order to prevent the bending angle from exceeding 180 degrees and 0 degrees due to the inertial force in the opening and closing operations. To ensure reliable operation. This is necessary in order to reliably hold the respective set angle positions over a large number of operations, especially when the bending angles are configured to be in the extreme positions close to 180 and 0 degrees.

The contact pressure load characteristic acting between the contact point 2a of the fixed contactor 2 and the contact point 3a of the movable contactor 3 depends on the boosting ratio (toggle magnification) corresponding to the position of the toggle link. Increase and change. Therefore, even if the spring constant is constant, the contact pressure load increases in the final stage of the wiping stroke rather than in the initial stage. Therefore, for example, when a high contact pressure load is required to pass a large current, the contact load by the spring is set to a slightly smaller load at the beginning of the wiping process in order to suppress the maximum load applied between the contacts. And can be easily configured to exert a sufficiently high load near the end. Further, since the contact pressure spring 19 can be a spring having a load reduced to 1 / (toggle ratio) of the necessary contact pressure load, it can be realized with a small wire diameter, and a required contact pressure load is generated in a small space. The configuration can be easily realized.

Next, in the opening operation, the three-phase shaft 25 moves from the state shown in FIG. Then, the operating rod 15 moves substantially straight to the right, and the bending connecting point 13 moves to the guide hole 2
It abuts on the left end wall portion of No. 3. Along with this, the contact pressure spring 19 expands, and the contact pressure load decreases. Next, the left end wall portion of the guide hole 23 starts pushing the bending connection point 13 to the right by further movement of the operation rod 15. As a result, the first link 10 and the second link 11 constituting the toggle link 9 are respectively rotated in the direction in which the degree of bending is increased (the direction in which the bending angle is decreased), and the contacts are opened. Next, operating rod 15
Following the above-mentioned operation, each part operates and moves the necessary stroke to complete the opening operation (Fig. 1). In the opening operation above,
In the reverse process of the contact stroke at the initial stage of operation, the operation stroke of the operating rod 15 and the operating device 14 is longer than the slight movement stroke of the movable contactor 3 due to the toggle link effect. The longer the stroke, the less opening force is required. Therefore,
It is possible to open the contact with a small opening force as long as the required opening speed is given. Further, the inertial force of the operation rod 15 and the three-phase shaft 25, which has reached a high speed until the contacts are separated, is greatly expanded via the toggle link 9, and acts on the movable contactor 3 as a large tripping force. Therefore, a stable opening operation is always maintained without a strong opening spring. In the opening operation, a large accident current may flow to cause partial welding at the contacts, and in such a case, a large trip force is required. While the above-mentioned structure is relatively compact and simple, a desired large trip force can be obtained.

(Second Embodiment) FIG. 3 is a side view showing an operating mechanism of a vacuum switch according to a second embodiment. This embodiment essentially has a configuration very similar to that of the first embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In the figure, the operating rod 15 is connected to a connecting point 13 via a pressure contact device 16.
The driving force is transmitted to. The pressure contact device 16 is a right spring seat 17
And a left spring seat 18, and both spring seats are provided with a guide portion 2
0 and 21 are formed. The guide 22 and 21 hold the contact pressure spring 19, and the shaft 22 connected to the connection point 13 slidably penetrates the case 16a of the contact pressure device 16. The driving force of the operating rod 15 is the case 16
It is connected to the connecting point 13 via a, the contact pressure spring 19, the spring seat 18 and the shaft 22. In the opening operation, the operating rod 15 moves rightward in the drawing. As a result, the case 16a of the pressure contact device 16 is driven to drive the shaft 22 via the contact spring 19, and the right end of the case 16a abuts the shaft end 22a to drive the connecting point 13 to the right. To do.
The subsequent operation is similar to that of the first embodiment. In the closing operation, the operating rod 15 moves to the left in the drawing, and the case 16
The connection point 13 is driven from a through the contact pressure spring 22 and the shaft 22. When the operating rod 15 further moves to the left and enters the contact pressure stroke, the contact pressure spring 19 starts to be further compressed from the initial compression state. Then, as the load increases along with this, the load is expanded by the toggle boosting effect, and a predetermined contact pressure stroke that should be a required value is operated to complete the closing operation.

(Third Embodiment) FIG. 4 is a side view showing an operating mechanism of a vacuum switch according to a third embodiment. The same or corresponding parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. FIG.
In, the connection point 27, which is the operation input point, is the axis of the second link 11 of the toggle link 9 (the fulcrum 12 and the bending connection point 1).
It is provided at a position slightly displaced on a line (connecting with 3). By providing the connecting point 27 at such a position,
The difference in the operation process between the operating device 14 and the toggle link 9 is matched, the operating force from the operating device 14 is small, and the number of interlocking members can be reduced. Operating device 14
The operating rod 15 from the relative positional relationship between the toggle link 9 and the toggle link 9.
In the arrangement in which is inclined, the shape of the lever member forming the second link 11 may be any shape suitable for providing the connecting point 27.

(Fourth Embodiment) FIG. 5 is a side view showing an operating mechanism of a vacuum switch according to a fourth embodiment. FIG. 6 is a sectional view of the support plate 40 and the like shown in FIG. 5 as viewed from the right. In FIG. 5, the fixed support plate 40 is provided with a guide hole 28 having an allowance in an appropriate longitudinal direction in which the movable contact 3 operates.
Are formed. The guide pin 28 supports the connecting pin 8 (floating connecting point) together with the rolling wheel 29 so as to be slidable and rollable. As a result, the movement of the movable contactor 3 is restricted only in the stroke direction, so that it can withstand the bending force received from the toggle link 9. In addition, it is possible to secure the required guiding accuracy in the case of requiring a highly accurate linear guide of a large-capacity vacuum switch tube and a long operation stroke in a high-voltage switch tube. Further, it is possible to suppress the bending load particularly applied to the insulating tubular portion of the vacuum switch tube 1 against a large mechanical impact or an electromagnetic force generated in the movable energizing portion when the impact during operation or a large current flows. Therefore, unnecessary friction is prevented and stable operation is performed. In this way, stable opening and closing performance can always be maintained.

(Fifth Embodiment) FIG. 7 is a side view showing an operating mechanism of a vacuum switch according to a fifth embodiment. The same or corresponding parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Figure 7
In, the first arm 32 is provided at a position corresponding to the toggle link 9 of each phase on the shaft 31 common to each phase. In addition, one (common to each phase) second arm 33 is provided at a position suitable for connecting to the operation device 14. The first arm 32 and the second arm 33 have an axis 3
When the second arms 33 which are fixed to each other via 1 are driven, the first arms 32 provided corresponding to the respective phases are driven. The entire operating portion formed by the first arm 32, the second arm 33 and the shaft 31 is referred to as an operating lever 34. A pin (hereinafter simply referred to as a turning point) 35 serving as a turning point is provided on the first arm 32 of the operation lever 34, and
One end of the link 11 is pivotally supported at this turning point 35. FIG.
FIG. 6 is a detailed view showing an engagement relationship between the operation lever 34 and the toggle link 9. In FIG. 8, a rod 36 is connected to a connection point 13 between the first link 10 and the second link 11. Then, the spring seat 37 formed at the tip of the first arm 32
The rod 36 is inserted through a hole 38 provided at the center of the pressure contact spring 19 to hold one end of the contact pressure spring 19.
Therefore, the contact pressure spring 19 is mounted so that the driving end (upper end) of the first arm 32 approaches the connecting point 13.
The contact pressure spring 19 is configured such that, in its open (non-compressed) state, the initial compression load is transmitted as a force equivalent to the contact pressure required at the initial contact of the contact. FIG. 8 shows the initial state of the contact pressure stroke. In this state, the first arm 32 is driven in the counterclockwise direction, and the connection point 13 is driven leftward via the contact pressure spring in which the initial compression load is set. It is in the state of beginning to do. From here, the contact pressure spring 19 is further compressed to connect the connecting point 13
Apply sufficient force to the contact pressure load.

In FIG. 8, the turning point 35 of the second link is slightly displaced (deviated or deviated) with respect to the axis passing through the shaft 31 of the operating lever 34 and the connecting point 13 in the initial state of the contact pressure stroke. It means that it is provided. As a result, during the contact pressure stroke operation, the rotation point 35, which is the fulcrum of the second link 11, changes its position in the vertical and horizontal directions with the rotation of the lever while the upper end of the first link 10 is restrained. Along with this, a characteristic is obtained in which the toggle characteristic subtly changes corresponding to the rotation angle corresponding to the contact pressure stroke of the operation lever 34. For example, when the rotary shaft 31 is displaced in the upper right direction, the toggle magnification becomes smaller at the end of the contact pressure stroke, and becomes larger at the end in the contact pressure stroke. The degree of change becomes more significant as the fulcrum moves away from the center of rotation of the lever. Actually, it is needless to say that the above-mentioned elements and the contact pressure spring characteristics are actually related to each other so that the contact pressure load does not change, or on the contrary, has a large change, and so on.

Various configurations are produced depending on where the turning point 35 is provided. 9 to 11 schematically show four types of configurations in which the position of the turning point 35 is different, by a diagram. In the figure, the solid line shows the initial stage of the contact pressure stroke, and the chain double-dashed line shows the closed state. The same parts as those shown in FIG. 8 are designated by the same reference numerals and, for simplification of the drawing, parts not directly related to the operation description are not shown. Figure 9
Shows the configuration when the drive shaft 31 and the pivot point 35 of the second link are arranged at the same position. The arm length of the second link 11 has a hole 38 (FIG. 8) that determines the posture of the rod 36.
And the shaft 31 have substantially the same size. The solid line in the figure shows the initial state of the contact pressure stroke, and the alternate long and short dash line shows the final position of the contact pressure stroke of only the first arm 32. Since the states of the rod 36 and the contact pressure spring 19 change little, the expression of their displacement is omitted. In the closing operation, when the first arm 32 rotates in the counterclockwise direction, when the movable contactor (not shown) comes into contact with the fixed contactor (not shown) in the initial stage of the contact pressure stroke, at the same time with the first contact. The link 10 and the second link 11 stop in that state. After that, only the first arm 32 operates counterclockwise against the contact spring 19. During this time, the contact pressure increases in proportion to the spring constant of the contact spring 19, reaches the maximum value when the contact stroke is completed, and the closing operation is completed.

In comparison with FIG. 9, FIG. 10 shows the pivot point 35 of the second link 11 as the center point of the shaft 31 and the connecting point 13.
Is displaced to the upper right (first quadrant region) side with respect to a line segment (hereinafter, referred to as a reference line) connecting the center point of the. In the contact pressure stroke of this configuration, the toggle magnification obtained by the first link 10 and the second link 11 decreases with the operation. The solid line in the figure shows the initial state of the contact pressure stroke, and the alternate long and short dash line shows the first arm 32, the first link 10, the second link and the rod 3.
The state of the final position of each contact pressure stroke of 6 is shown. Illustration of the state change of the contact pressure spring 19 is omitted. When the first arm 32 moves counterclockwise from the initial state of the contact pressure stroke shown by the solid line, the rotation point 35 of the second link 11 supported on the first arm 32 also rotates about the shaft 31. Move to position A in the upper left direction. On the other hand, the first link 10 whose upper end is constrained rotates counterclockwise. In this way, the angle sandwiched by the first link 10 and the second link 11 at the beginning of the pressure contact stroke changes, and a large angle initially becomes small at the end of the pressure contact stroke. Along with this, the toggle magnification formed by the first link 10 and the second link 11 changes from a large value to a small value. Therefore, the rate of increase in the contact pressure of the contact pressure spring 19 in the contact pressure stroke can be made a characteristic that the change is small in the contact pressure step due to the toggle magnification that greatly changes. The above characteristics are mainly due to the turning point 35.
The displacement, angle, and degree of displacement (dimension between 31 and 35) can be obtained as appropriate values.

In FIG. 11, in comparison with FIG. 9, the turning point 35 is displaced to the upper left (second quadrant region) side with respect to the reference line, and in the contact pressure stroke operation, the first link 10 and the first link 10 are moved. This is a configuration example in which the toggle magnification obtained by the two-link 11 changes so as to increase with the operation. The solid line in the figure shows the initial state of the contact pressure stroke, and the alternate long and short dash line shows the first arm 3
2 shows the state of the final position of the contact pressure stroke of each of the first link 10, the second link 11, and the rod 36. Illustration of the state change of the contact pressure spring 19 is omitted. When the first arm 32 moves counterclockwise from the initial state of the contact pressure stroke shown by the solid line, the rotation point 35 of the second link 11 supported on the first arm 32 also rotates about the shaft 31. Move to the position A in the lower left direction. On the other hand, the first link 10 whose upper end is restricted rotates clockwise. In this way, the angle sandwiched by the first link 10 and the second link 11 at the beginning of the pressure contact stroke changes, and a small angle initially increases at the end of the pressure contact stroke. Along with this, the toggle magnification formed by the first link 10 and the second link 11 changes from a small value to a large value. Therefore, the contact pressure of the contact spring 19 in the contact stroke can be increased.

In the example of FIG. 12, the shaft 31 and the second link 11 are used.
Are configured to rotate about the same points.
Moreover, the dimension between the hole 38 and the shaft 31 that determines the posture of the rod 36 is longer than the length of the arm of the second link 11. The solid line in the figure shows the initial state of the contact pressure stroke, and the alternate long and short dash line shows the state of the final position of the contact pressure stroke of each of the first arm 32, the rod 36 and the contact pressure spring 19. In the closing operation, when the contacts come into contact with each other in the initial stage of the contact pressure stroke in the process in which the first arm 32 rotates counterclockwise, at the same time, the first link 10 and the second link 11 stop in their respective states. After that, only the first arm 32 operates counterclockwise against the contact pressure spring 19. During this time, the contact pressure increases in proportion to the spring constant of the contact spring 19, but the angle formed by the center line of the rod 36 with respect to the reference line of the second link 11 is 90 ° before and after the stroke operation. The center is set so as to be distributed to both sides to prevent the contact pressure load from becoming small in the latter half of the contact pressure stroke. In other words, the contact pressure spring 19 is formed so as to operate without changing its characteristics.

FIG. 13 is a graph showing changes in the contact pressure characteristics in the respective arrangements shown in FIGS. 9 to 12. In the configurations of FIGS. 10 and 12, the degree of increase in the contact pressure load is small, and the configuration of FIG. 11 is large. The configuration of FIG. 9 has an intermediate degree of increase.

(Sixth Embodiment) FIG. 14 is a side view showing an operating mechanism of a vacuum switch according to a sixth embodiment. Vacuum switch tube 1, fixed contact 2, its contact portion 2a, movable contact 3, its contact portion 3a, flexible conductor 4, insulating rod 5, guide link 6, fulcrum 7, floating connection point 8, operating device 14, Since the part 51 of the frame, the main circuit conductors 106 and 108, and each part of the insulating frame 107 are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

The upper end of the first link 10 is pivotally supported by the floating connection point 8 and the lower end is connected to one end of the second link 61 at the bending connection point (connection pin) 13. Second link 6
The other end of 1 is rotatably supported at a fulcrum 66 provided on the drive lever 62. A spring seat 18 is provided below the drive lever 62, and a contact pressure spring 19 is mounted between the spring seat 18 and the lower right portion of the second link 61 to form the contact pressure device 16. At this time, the contact pressure spring 19 is held in the state of the initial compression load. The bent connecting point (connecting pin) 13 is loosely fitted in a guide hole 62 a provided in the drive lever 62. The drive lever 62 is fixed to a lever 64 via a fixed pin 65, and the lever 64 is connected to the operating device 14 via an operating rod 63. In the open state of the vacuum switch tube 1 shown in the figure, the bending connecting point (connecting pin) 13 has a guide hole 62.
It is in contact with the upper end side portion 62b of a. In the open state shown in FIG. 14, the fulcrum 66 is substantially on the extension of the straight line connecting the floating connection point 8 and the bending connection point 13. Therefore, these three points are substantially aligned. If the bending connecting point 13 is displaced to the upper left with respect to the line segment connecting the fulcrum 66 and the floating connecting point 8, that is, if the three connecting points have an upward convex shape, then the displacement Depending on the degree, the first link 10 may not be activated when it is turned on. Therefore, it is necessary to arrange the fulcrum 66, the bending connection point 13, and the floating connection point 8 on a substantially straight line.

Next, the operation of the sixth embodiment will be described. The operating device 14 is driven and the operating rod 63 is moved to the position shown in FIG.
When it is moved to the right, the lever 64 rotates clockwise.
As a result, the drive lever 62 and the second link 61 rotate clockwise around the pin 65. The bending connecting point (connecting pin) 13 is thereby driven rightward in the figure, and the first link 10 pushes up the floating connecting point 8 while rotating counterclockwise. As a result, the floating connection point 8 becomes the guide link 6
The movable contact 3 is pushed up while being guided by the clockwise rotation guide by. When the contact part 3a comes into contact with the contact part 2a, the floating connection point 8 stops at that position. After that, a constant distance is maintained between the stopped floating connection point 8 and the fixed pin 65. Subsequently, when the drive lever 62 is further driven, the bending connection point 13 is relatively pushed down within the guide hole 62a, so that the first link 10 rotates counterclockwise about the floating connection point 8. Movement is allowed. At the same time, the second link 61 starts to rotate clockwise around the fulcrum 66. At this time (up to) when the bending connection point 13 starts to separate from the upper end side portion 62b of the guide hole 62a.
Is the initial compression state of the pressure contact device 16.

When the drive lever 62 is further driven by the predetermined amount after the initial compression state, the vacuum switch tube 1 is turned on as shown in FIG. In the state of FIG. 15, a gap is formed between the bending connection point 13 and the upper end side portion 62b of the guide hole 62a, and the pressure contact device 16 stores energy correspondingly. That is, a predetermined contact pressure is applied to the contact points 3a and 2
It is given during a. A gap remains between the bending connection point 13 and the lower end of the guide hole 62a. As described above, the remaining gap suppresses the situation where the movable part rebounds excessively near the final closing position and the contacts are restarted and separated from each other.

In the sixth embodiment, the moving distance of the bending connecting point 13 in the guide hole 62a, that is, the upper end side portion 62b.
The distance from the position to the position of the bending connection point 13 at the time of closing shown in FIG. 15 corresponds approximately to the contact pressure process of the contact. Further, in the initial state of the closing operation of the vacuum switch tube 1 (FIG. 14), the first link 10 and the second link 61 which are arranged almost in a straight line via the bending connection point 13 and the drive lever 6 are arranged.
An axial line connecting the second pin 65 and the fulcrum 66 constitutes a dogleg-shaped toggle link. Therefore, the bending angle of the toggle link at this time is an angle formed by the floating connection point 8, the fulcrum 66, and the pin 65. On the other hand, when the closing is completed (FIG. 15), the first link 10 and the axial line portion (corresponding to the action line of the contact spring 19) connecting the bending connection point 13 and the pin 65,
A toggle link 9 having a V-shape is formed. Since the toggle link 9 has a shape that is expanded when the contact point is closed, as in the first embodiment, the driving force applied from the second link 61 to the bending connection point 13 in the substantially right direction is due to the toggle effect. To be multiplied. Therefore, a large contact pressure can be provided with a small operating force. Further, in the contact pressure process, a high contact pressure load and a large impact load based on the contact load act between the contacts, and these loads are reduced to a fraction by a toggle link and added to the operating device 14. . In this way, the load is low and flat as a whole, and the operation is possible even with a small operation force. Further, although the speed is increased in the initial stage of the closing operation, the contact portion 3a comes into contact with the contact portion 2a through a process of changing from the speed increasing operation to the speed reducing operation in accordance with the decrease in the bending degree of the toggle link.

Even in the closed state shown in FIG. 15, the toggle link 9 is not fully extended and remains in the shape of a dogleg. In other words, the bending angle of the toggle link 9 is selected to be larger than the right angle and smaller than 180 degrees. With this configuration, the rotational force in the clockwise direction is always generated in the first link 10 after the closing, so that the opening speed at the opening operation is increased. However, if the operating device 14 can generate a large opening drive force, the first link 10 and the action line of the contact pressure spring 19 are configured to be substantially linear when they are closed. With this configuration, even if an electric / mechanical impact load that is inevitably generated in a movable part is not transmitted to the operation device 14, the closed state can be stably maintained. There is an advantage that can be. In this case, the first
A stopper 67 is provided in order to prevent the toggle link 9 from being inverted due to excessive movement of the link 10 and the operation lever 62. This prevents the opening / closing operation characteristics from fluctuating due to the reversal of the toggle link 9. Even if the toggle link 9 is not extended linearly, the toggle constituted by the first link 10 and the second link 61 may cause an excessive operation due to the high-speed closing operation, or may be operated by a large number of operations. The toggle link 9 may be inverted due to the fact that the operation becomes unstable with the natural increase in the clearance of the connecting portion. Therefore, it is preferable to provide the stopper 67.

In the initial state of the pressure contact step, the second link 61 is connected to the first straight line connecting the bending connection point 13 and the pin 65 (that is, the direction of the action line of the contact pressure spring 19).
Of the second straight line connecting the fulcrum 66 and the bending connection point 13, in other words, what posture the second link 61 maintains with respect to the line of action of the contact spring 19. There is a change in the contact pressure process characteristics depending on whether or not it is present. Specifically, in the initial state of the pressure contact step, the second straight line is in a clockwise angular position as viewed from the first straight line, in a angular position larger than the right angle, and Three different configurations are possible, one at a smaller angular position. First, if it is in a right angle position,
The operating force transmitted by the second link 61 is orthogonal to the line of action of the contact pressure spring load, and therefore has almost no effect on the contact pressure originally exerted by the contact pressure spring 19. Next, when it is at an angular position larger than the right angle, the direction of the contact pressure component force directly applied from the operating force with respect to the direction of the contact pressure generated by the contact pressure spring 19 during the operation of the contact pressure stroke. Is approximately in the opposite direction, so the subtractive contact pressure has a lower value. This tendency becomes remarkable as the backward component increases as the angular position becomes larger than the right angle. If the fulcrum 66 exists on the extension line of the action line of the contact pressure spring 19 (that is, the angle of 180 degrees), the reverse direction component becomes the maximum and the contact pressure becomes the minimum. On the contrary, when the angle position is smaller than the right angle, the direction of the contact force component force directly applied from the operating force with respect to the contact pressure generation direction obtained by the contact pressure spring 19 during the operation of the contact pressure stroke. Are almost in the same direction, and the contact pressure becomes higher by being added accordingly. This tendency becomes more remarkable as the component in the same direction increases as the angular position becomes smaller than the right angle. If the fulcrum 66 exists on the line of action of the contact pressure spring 19 (that is, the angle is 0 degree), the same direction component becomes the maximum, and the maximum contact pressure is obtained.

As described above, in this embodiment, since the operating force is vectorally combined with and applied to the contact pressure spring load, the angular position of the second link 61 with respect to the first straight line is changed. As a result, different contact pressure process characteristics can be obtained. The contact pressure at the contact is obtained by the vector sum of the contact spring load and the operating force transmitted by the second link 61 during the contact stroke operation, but the operating device 14 is stopped in the completion state of the closing after the stroke operation. Then, since it is maintained in that state, the operating force does not contribute to the contact pressure. At the same time, the contact pressure changes to a value corresponding to the load obtained by only the contact pressure spring 19 and is held. As a result,
The characteristic that the contact pressure is higher or lower than the contact pressure obtained by the contact pressure spring 19 obtained in the closing completed state is dynamically obtained during the contact pressure stroke operation without changing the operating force of the operating device 14. be able to.

FIG. 16 is a graph showing an example of the contact pressure process characteristics, where A is the contact pressure spring 19 obtained in the completion state of charging.
The contact pressure by the contact pressure spring 19 is higher than that by the contact pressure B, the characteristic B depends on the contact pressure by the contact pressure spring 19 all the time, and the characteristic C is the contact pressure by the contact pressure spring 19 obtained in the completion state of injection. The characteristics that each of them has a lower contact pressure than that of the above. For example, in the case of a switch of a circuit in which the making current is large and the energizing current in the steady state is small, such as when a short circuit or a capacitor is made, a high contact pressure is applied during the contact stroke operation. Therefore, it is preferable that the contact pressure of a lower load, which is the minimum required for energization, is applied in the charged state, and thus the characteristic such as A is preferable. By setting the optimum characteristics in this way, the operating device 14 can be made as small as possible and economically constructed. On the other hand, when a high-impedance large-capacity device with a small making current and a large energizing current is connected as a load, the contact pressure during making operation is made relatively low by setting the characteristic like C. To reduce the load applied during the closing operation. In this way, the load can be further leveled, and a necessary and sufficient contact pressure can be obtained in the completion state of charging. In addition to the angular position of the second link 61 as described above, there are factors that affect the change in the contact pressure process characteristics. For example, as the length of the arm of the second link 61 becomes longer, the degree of change in the characteristics becomes gentler, and as the length of the arm of the second link 61 becomes shorter, the degree of change becomes more remarkable. Therefore, the length of the arm of the second link 61 is appropriately selected. By doing so, the characteristics can be adjusted.

Although only one operating lever 62 is shown in FIGS. 14 and 15, the first link 10 is not shown.
It is preferable that a pair of the second link 61 and the second link 61 are provided in a direction perpendicular to the paper surface of the drawing so that the bending connection point 13 is inserted through the pair of guide holes 62a. By providing the pair of operation levers 62 in this way, the fulcrum 66
Since the bending connection point 13 and the bending connection point 13 can be supported from both ends thereof, it is possible to prevent the rotation posture of the second link 61 from being collapsed and to regulate the rotation range so as not to deviate from a predetermined range. it can.

(Seventh Embodiment) FIG. 17 is a side view showing an operating mechanism of a vacuum switch according to a seventh embodiment. Vacuum switch tube 1, fixed contact 2, its contact portion 2a, movable contact 3, its contact portion 3a, flexible conductor 4, insulating rod 5, guide link 6, fulcrum 7, floating connection point 8, operating device 14, Since the part 51 of the frame, the main circuit conductors 106 and 108, and each part of the insulating frame 107 are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted. 1st link 1
The upper end of 0 is pivotally supported at the floating connection point 8 and the lower end is connected to one end of the drive lever 71 at a bending connection point (connection pin) 13. Since the bent connecting point (connecting pin) 13 is engaged with the guide hole 71a provided in the drive lever 71, it can slide along the guide hole 71a. The other end of the drive lever 71 is rotatably supported by a fixed pin 65, and is driven by the operating device 14 via the operating rod 63. The spring receiving member 73 can also rotate around the pin 65 separately from the operation lever 71. One end of the spring guide 72 is axially supported by the bending connection point 13 while holding the contact spring 19, and the other end is fixed by a nut 74 through a hole 73a of a spring receiving member 73. A spring guide 72 whose one end is fixed to the bending connection point 13, a spring receiving member 73, a contact spring 19, and a nut 7.
Reference numeral 4 constitutes a pressure contact device 16. The stopper 75 is attached to a predetermined fixed portion of the vacuum switch frame.

Next, the operation of the seventh embodiment will be described. The operating device 14 is driven and the operating rod 63 is moved to the position shown in FIG.
When it is moved to the right, the drive lever 71 rotates clockwise about the pin 65. The bending connecting point (connecting pin) 13 inserted in the guide hole 71a is thereby driven rightward in the figure, and the first link 10 pushes up the floating connecting point 8. As a result, the floating connection point 8 rises while being guided by the guide link 6 in the clockwise direction, and the movable contact 3 is pushed up. When the contact part 3a comes into contact with the contact part 2a, the floating connection point 8 stops at that position. The bending connection point (connection pin) 13 can slide in the guide hole 71a, but a predetermined force (corresponding to the initial contact pressure load) is applied by the contact pressure spring 19 in the axial direction of the contact pressure spring 19. So
The bent connection point (connection pin) 13 remains at the upper end of the guide hole 71a until the floating connection point 8 stops.

When the floating connection point 8 stops (that is, reaches the initial stage of the pressure contact stroke), a fixed distance is maintained between the stopped floating connection point 8 and the fixed pin 65. Further, almost at the same time when the floating connection point 8 stops, the right end of the spring receiving member 73 contacts the head of the stopper 75.
After that, when the drive lever 71 is further driven, the bending connection point 13 is relatively pushed down in the guide hole 71a, so that the first link 10 centered on the floating connection point 8 is formed.
The counterclockwise rotation of the drive lever 71 and the clockwise rotation of the drive lever 71 are allowed. Further, since the movement of the spring receiving member 73 is stopped by the stopper 75, the bending connecting point 13
The pressing down of the contact pressure is accompanied by the compression of the contact pressure spring 19. The time when the bending connection point 13 starts to separate from the upper end portion of the guide hole 71a is the initial compression state of the pressure contact device 16. Therefore, in order to exert the toggle effect required for the initial compression state,
The positional relationship of each part at the time of starting the separation is determined.
When the drive lever 71 is further driven by a predetermined amount after the initial compression state, the vacuum switch tube 1 enters the closed state shown in FIG. In the state of FIG. 18, the bending connection point 13 and the guide hole 7
A gap is formed between the upper end portion of 1a and the pressure contact device 16 is charged accordingly. That is, a predetermined contact pressure is applied to the contact portion 3a. A gap remains between the bent connection point 13 and the lower end of the guide hole 71a. As described above, the remaining gap suppresses the situation where the movable part rebounds excessively near the final closing position and the contacts are restarted and separated from each other.

In the seventh embodiment, the first link 10 and the drive lever 71 form a dogleg-shaped toggle link 9. The operation of the toggle link 9 is similar to that of the first embodiment and the like, and therefore its explanation is omitted. However,
In this embodiment as well, as in the sixth embodiment, the bending extension of the toggle link 9 is not stopped by the contact of the contact portions 3a and 2a, but the bending connection point (connection pin) 13 moves while the bending is extended even after the contact. It has a structural feature that the contact pressure spring 19 is stored. Note that this feature is common to Examples 8 to 14 described later. 17 and 18, the angular displacement of the spring guide 72 with respect to the central axis of the drive lever 71 is due to the toggle effect at the closing position of the first link 10 and the drive lever 71, the opening drive component force of the contact pressure spring 19, and It is determined by selecting an appropriate position in consideration of the relationship between the contact force components and adjusting the characteristics.

17 and 18, the guide hole 71
The operation characteristics differ depending on how the longitudinal centerline of a is provided with angular displacement with respect to the central axis of the drive lever 71. For example, in FIGS. 17 and 18, the longitudinal direction of the guide hole 71a is substantially parallel to the central axis of the drive lever 71, that is, the center of the pin 65 exists substantially on the extension of the longitudinal central axis of the guide hole 71a. With this state as a reference, when the central axis of the guide hole 71a in the longitudinal direction is slightly inclined in the clockwise direction, the contact pressure stroke distance of the contact pressure spring 19 increases. On the contrary, when it is slightly tilted counterclockwise, the contact pressure stroke of the contact spring 19 is reduced. This is effective as a method when it is desired to give a required opening speed to the contact after the contact pressure stroke operation or when the contact opening time is set to an appropriate value. Due to the opening / closing operation, the bent connecting point (connecting pin) 13 slides in the guide hole 71a under high speed and high load conditions, resulting in large resistance and friction loss. Then, there is a possibility that various inconveniences may occur due to a large number of operations. Therefore, the bending connection point (connection pin) 13
It is preferable to provide a roller (not shown) between the guide hole 71a and the guide hole 71a so as to make rolling contact. In this way, the load on the operating device 14 is reduced, and stable operation characteristics are exhibited even when the operation device is operated many times.

(Embodiment 8) FIG. 19 is a side view showing a part of the operating mechanism of a vacuum switch according to Embodiment 8. Example 7
The difference is that the rod end 76 has a spring guide 7
2 is provided separately, and both are screwed together. The other parts are the same as those in the seventh embodiment, and the description thereof will be omitted. The initial load of the contact pressure spring 19 is adjusted by adjusting the connecting length of the both. Also,
The position of the spring receiving member 73 at the lower end is adjusted by the nut 74, and the timing at which the contact pressure of the contact pressure spring 19 acts on the contact position of the contact is adjusted. These adjustments can be easily performed when assembling and adjusting the operating mechanism.

(Ninth Embodiment) FIG. 20 is a side view showing a part of an operating mechanism of a vacuum switch according to a ninth embodiment. Example 7
The description of the seventh embodiment is applied to the portions common to the above, and only different points will be described. Spring receiving member 73
The lower left end of A is pivotally supported by a fixed pin 65, and the right end is pivotally supported by a pin 76. The pin 76 is the support member 7
7 is engaged with a hole 77a that is long in the vertical direction in the figure. The support member 77 is connected to a support member 79 fixed to the frame 91 of the vacuum switch via bolts 78 and the like. Therefore, the position of the pin 76 can be adjusted by adjusting the tightening position of the bolt 78. If the position of the pin 76 changes, the contact pressure will change accordingly.
A guide hole 72a that is long in the axial direction is provided at the upper left end of the spring guide 72. The bent connecting point (connecting pin) 13 loosely fitted in the guide hole 72a has a gap between it and the upper left end of the guide hole 72a when the vacuum switch tube is opened (the state shown in FIG. 20), and the contact point is small. It abuts on the lower right end at the start of the pressing process. The bent connection point 13 after contacting the contact spring 1 while sliding in the guide hole 71a of the drive lever 71.
Compress 9. By adjusting the tightening position of the nut 74, the position of the guide hole 72a with respect to the bending connection point 13 slides, so that the timing at which the contact pressure first acts can be changed.

(Embodiment 10) FIG. 21 is a side view showing an operating mechanism of a vacuum switch according to Embodiment 10. Vacuum switch tube 1, fixed contact 2, its contact portion 2a, movable contact 3, its contact portion 3a, flexible conductor 4, insulating rod 5, guide link 6, fulcrum 7, floating connection point 8, operating device 14, A portion 51 of the frame, main circuit conductors 106 and 108, and
Since each part of the insulating frame 107 is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted. FIG. 21 shows the open state. The upper end of the first link 10 is pivotally supported by the floating connection point 8, and the lower end is a bent connection point (connection pin) 1
3 is connected to one end of the drive lever 80. Since the bent connecting point (connecting pin) 13 is engaged with the guide hole 80a provided in the drive lever 80, it can slide along the guide hole 80a. The other end of the drive lever 80 is rotatably supported by a fixed pin 65, and is driven by the operating device 14 via the lever 64 and the operating rod 63. In this embodiment, the pressure contact device 16 is provided on the drive lever 80. The contact pressure spring 19 is held by the upper spring seat 26 and the lower spring seat 18.
The lower spring seat 18 is fixed on the drive lever 80, and the upper spring seat 26 moves in accordance with the bending connecting point (connecting pin) 13 inserted through the tip end portion thereof. In the opened state of the vacuum switch tube 1, the initial compression load is applied to the contact pressure spring 19.

Next, the operation of the tenth embodiment will be described. The operating device 14 is driven and the operating rod 63 is moved to the position shown in FIG.
When moved to the right of 7, the drive lever 80 rotates clockwise about the pin 65. The bending connecting point (connecting pin) 13 inserted in the guide hole 80a is thereby driven rightward in the drawing, and the first link 10 pushes up the floating connecting point 8. As a result, the floating connection point 8 rises while being guided by the guide link 6 in the clockwise direction, and the movable contact 3 is pushed up. When the contact part 3a comes into contact with the contact part 2a, the floating connection point 8 stops at that position. The bending connecting point (connecting pin) 13 can slide in the guide hole 80a, but since a predetermined force is applied by the contact pressure spring 19, the bending connecting point (connecting pin) 13 is the floating connecting point 8 Stays at the upper end of the guide hole 80a until it stops.

When the floating connection point 8 stops (that is, reaches the initial stage of the contact pressure stroke), a fixed distance is maintained between the stopped floating connection point 8 and the fixed pin 65. Thereafter, when the drive lever 80 is further driven, the bending connecting point 13 is relatively pushed down along the guide hole 80a, so that the first link 10 rotates counterclockwise about the floating connecting point 8. The movement and the clockwise rotation of the drive lever 71 are allowed. Further, the depression of the bending connection point 13 is accompanied by the compression of the contact pressure spring 19. This bend connection point 1
3 is the initial compression state of the contact pressure device 16 at the time when the pressure contact device 16 starts to separate from the upper end of the guide hole 80a. Therefore, in order to exert the toggle effect required for the initial compression state, the positional relationship between the respective parts and the slope of the guide hole 80a at the time of starting the opening are determined. After the initial compression state, when the drive lever 80 is further driven by a predetermined amount, the vacuum switch tube 1 enters the closed state shown in FIG. In the state of FIG. 22, a gap is formed between the bending connection point 13 and the upper end portion of the guide hole 80a, and the pressure contact device 16 is charged by that amount.
That is, a predetermined contact pressure is applied to the contact portion 3a.
A gap remains between the bending connection point 13 and the lower end of the guide hole 80a. As described above, the remaining gap suppresses the situation where the movable part rebounds excessively near the final closing position and the contacts are restarted and separated from each other.

In the tenth embodiment, the first link 1
The “0” and the drive lever 80 form a dogleg-shaped toggle link 9. The operation of the toggle link 9 is similar to that of the first embodiment and the like, and therefore its explanation is omitted.

(Embodiment 11) FIG. 23 is a side view showing an operating mechanism of a vacuum switch according to Embodiment 11. Vacuum switch tube 1, fixed contact 2, its contact portion 2a, movable contact 3, its contact portion 3a, flexible conductor 4, insulating rod 5, guide link 6, fulcrum 7, floating connection point 8, operating device 14, A portion 51 of the frame, main circuit conductors 106 and 108, and
Since each part of the insulating frame 107 is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted. The upper end of the first link 10 is pivotally supported on the floating connection point 8, and the lower end is connected to one end of the drive lever 81 at a bending connection point (connection pin) 13. The other end of the drive lever 81 is rotatably supported by a pin 65. The drive lever 81 is connected to the operating device 14 via the operating rod 63.
The bent connecting point (connecting pin) 13 is loosely fitted in a guide hole 81 a provided in the drive lever 81. Further, it is connected to the thrust link 82 via the bending connection point (connection pin) 13. The thrust link 82 is connected to a spring link 83 via a pin 86, and the spring link 83 has a pin 87.
Is pivotally supported by. The pin 87 is attached to a support member 85 fixed to the frame 91 of the vacuum switch. The spring link 83 has a spring receiving portion 83a and a frame 91.
A contact pressure spring 19 is loaded between the stopper and the stopper 84.
Is adjusted in height so as to regulate the movement of the spring receiving portion 83a and determine the initial compression load of the contact pressure spring 19.

In the eleventh embodiment, the bending connecting point (connecting pin) 13 is pushed down from the initial compressed state, and the spring link 83 pivots counterclockwise about the pin 87 and contacts via the thrust link 82. The pressure spring 19 is compressed.
At the end of the contact pressure process, the compressed contact pressure spring 19 applies a predetermined load to the movable contactor 3, and the bending connection point (connection pin) 1
No. 3 leaves a slight gap with the lower end of the guide hole 81a.
The configuration according to the eleventh embodiment is easy even in a large-capacity vacuum switch or the like where the contact pressure spring is strong, and the contact pressure load can be easily adjusted. Further, the expansion and contraction width of the contact pressure spring 19 is small, and thus the process operation is short.
Further, since the pin 87 is fixed, one of the movable parts is installed in a stationary state. Therefore, the equivalent movable weight is small, and a small driving force is sufficient for high speed operation.
By disposing the thrust link 82 with respect to the operation direction of the movable contactor 3 or with the inclination angle appropriately selected with respect to the first link 10, the acting force of the contact pressure spring 19 is set to a large contact pressure and is simultaneously released. It can be configured as a high-speed, large-capacity operating type that also increases the driving force component. On the contrary, it is possible to adjust the characteristics such as increasing the opening drive component force while keeping the contact pressure small.

(Embodiment 12) FIG. 24 is a side view showing an operating mechanism of a vacuum switch according to Embodiment 12. The present embodiment is different from Embodiment 1 except that the position where the pressure contact device 16 is provided is different.
The configuration is basically similar to that of Example 1, and the description of Example 11 is applied. As shown in FIG. 24, the spring link 83 is extended to the left, and the pressure contact device 16 is provided farther from the pin 87, which is a fulcrum, than the pin 86. According to the configuration of this embodiment, the load of the contact pressure spring 19 is increased by the lever principle and transmitted to the thrust link 82, so that a large contact pressure can be obtained even with a contact pressure spring having a small load.

(Thirteenth Embodiment) FIG. 25 is a side view showing an operating mechanism of a vacuum switch according to a thirteenth embodiment. The present embodiment is different from Embodiment 1 except that the arrangement of the thrust link 82 is different.
The configuration is basically similar to that of Example 1, and the description of Example 11 is applied. In FIG. 25, the thrust link 82 has a shorter length than the drive lever 81 and is installed in the drive lever 81, that is, the thrust link 82 and the drive lever 81 are substantially in the same angular position as viewed from the connecting pin 13. Configured to be. The installation width of the pressure contact device 16 is small, and it is also possible to install the pressure contact device in the left-right reversal (line object) from the state shown in the drawing. With such a configuration, the space occupied by the thrust link 82 and the pressure contact device 16 is compact.

(Embodiment 14) FIG. 26 is a side view showing an operating mechanism of a vacuum switch according to Embodiment 14. This embodiment has basically the same configuration as that of the eleventh embodiment except that the structure of the pressure contact device 16 is different, and the description of the eleventh embodiment is applied to the same components. In FIG. 26, the thrust link 82 is connected to the spring link 83 via a pin 86. The spring link 83 is rotatably supported by a pin 87 on a support member 89 fixed to a frame 91 of the vacuum switch. Spring receiving portion 83 of the spring link 83
A bolt 84 and a nut 88 are attached to a, and the bolt 84 penetrates the contact pressure spring 19 loaded between the left spring seat 90 and the right spring seat 89a and is slidable with respect to the support member 89. . The state of FIG. 26 is a closed state, and the spring link 83 compresses the contact pressure spring 19. As shown in the figure, the thrust link 82 and the spring link 83 are connected to each other by connecting the bending connecting point 13, the pin 86, and the pin 87 to V.
Form a toggle link in the shape of a letter. A clockwise rotational force is generated in the spring link 83 after the closing operation is completed. With this configuration, the contact pressure can be provided even with a contact pressure spring having a small load, which is a fraction of the contact pressure required between the contacts. Since the initial compression load of the contact pressure spring 19 can be adjusted by changing the position of the nut 88, the required contact pressure characteristics can be obtained. Moreover, various characteristics can be obtained by changing the angle of the V-shape.

FIG. 27 is a graph showing a schematic change in the operating load at the time of making operation in each of the above-described embodiments (1 to 14) in comparison with the conventional one. A shows the characteristic of the operating mechanism of the conventional vacuum switch, and B shows the characteristic of the operating mechanism of the vacuum switch according to Examples 1 to 14. As is clear from FIG. 27, the operation load in the case of this embodiment (1 to 14) is smaller than that in the conventional case. Moreover, in each of the above-described Examples 6 to 14, the guide holes 62a, 71a, 80a, and 81a.
In the above, an example is shown in which it is formed to be linearly long in a predetermined direction, but it is also possible to obtain various contact pressure process characteristics by forming it in a curved shape or a combination of straight and curved lines.

[0113]

Since the present invention is configured as described above, it has the following effects.

The output end of the toggle link device is connected to the insulating rod connected to the movable contact, the operating means is engaged with the input end of the toggle link device, and the operating means extends the toggle link device. When operating, the operating force is multiplied by the toggle effect because it has the contacting device including the spring to be stored in the power transmission path from the operating means to the input end, so that the operating force is increased, and thus the operating force is high. Even in the case of a high-voltage large-capacity vacuum switch that requires a contact pressure load, the required load can be easily obtained by the low-load spring. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve.

Further, the toggle link device connected to the insulating rod is provided with the other end of the first link having one end connected to the insulating rod.
The other end of the second link having one end as a fixed fulcrum is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the open state of the vacuum switch tube, and in the closed state of the vacuum switch tube. Configured as a device having a substantially linearly extended shape, and engaging a movable input point,
An operating rod that drives the toggle link device by operating in a substantially linear manner, and when the operating rod operates in a direction to extend the toggle link device, energy is stored via the power transmission path from the operating rod to the movable input point. Since it has a contact pressure device including a spring to be operated, the operating force is multiplied by the toggle effect, and therefore, even in the case of a high-voltage large-capacity vacuum switch that requires a high contact pressure load, a low load is required. The required load can be easily obtained by the spring. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve.

Further, since the operating rod is arranged in the angular range sandwiched by the first link and the second link, the operating mechanism can be arranged in a small space.

Further, since the stopper for limiting the rotation of the first link or the second link to the predetermined range is provided, it is possible to reliably prevent the toggle link from being reversed.

Further, since the guide link having the other end that rotates with the fixed one end as a fulcrum is connected to the end of the insulating rod, the operation of the movable contact can be supported by a simple structure.

Further, since the operating rod is constructed so as to be engaged with the connecting point on the second link, it is possible to match the difference in operation process between the toggle link device and its operating mechanism.

Further, since the holding member having the hole for holding the connecting pin connecting the insulating rod and the other end of the first link slidably only in the operation stroke direction of the movable contact is provided, the vacuum switch tube It is possible to suppress an undesired bending load applied to the insulating cylinder, prevent unnecessary friction, and ensure stable operation.

Further, an operating rod having a hole into which the movable input point of the toggle link device is loosely fitted and having a guide portion for directly driving the movable input point in the opening direction of the vacuum switch by the hole end wall portion is provided. Therefore, when the vacuum switch is opened, the toggle link device is driven by this guide part, and when it is closed, a predetermined spring load is applied as a contact pressure within the range of the length of the hole. It is possible to easily achieve a configuration capable of transmission.

Further, since the operation lever which engages with the movable input point of the toggle link device and rotates to drive the toggle link device is provided, the comparatively compact structure is similar to the case where the operation rod is used. The effect can be obtained.

Since one end of the second link, which is a floating fulcrum, is provided on the rotating operation lever, the toggle link device is driven while adjusting the toggle magnification to a desired value according to the rotation of the operation lever. be able to.

At the initial position of the contact pressure stroke of the movable contactor, since the floating fulcrum is provided at a position deviating from the line segment connecting the rotation fulcrum of the operating lever and the movable input point, the contact pressure is increased in the contact pressure step. A configuration that increases, a configuration that does not increase much, and the like can be realized by slightly moving the fulcrum position.

Further, the other end of the first arm whose one end is pivotally attached to the movable contact side movable member and the other end of the second arm whose one end is pivotally supported by the fixing pin are The toggle link device is configured to be freely rotatably connected to each other, and the connection position is a bending connection point, and the spring of the pressure contact device is stored by relative movement of the bending connection point within the free fitting connection range. Therefore, the contact pressure can be obtained by the operating force multiplied by the toggle effect. Therefore, even in the case of a high-voltage large-capacity vacuum switch that requires a high contact pressure load, the required load can be easily obtained with a small operating force. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve.

Further, the other end of the first arm and the other end of the second arm are inserted into guide holes formed by giving a predetermined directionality to the other end of the second arm. A toggle link device is constructed by rotatably loosely connecting to each other via a connecting pin and using the position of the connecting pin as a bending connecting point to store the spring of the pressure contact device by relative movement of the connecting pin in the guide hole. Since it is configured to urge, the contact pressure can be obtained by the operating force multiplied by the toggle effect. Therefore, even in the case of a high-voltage large-capacity vacuum switch that requires a high contact pressure load,
The required load can be easily obtained with a small operating force. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve.

Since the guide hole is stopped at an intermediate position so that a gap is left between the guide hole and the connecting pin even when the vacuum switch tube is in the closed state, near the final closing position,
It is possible to prevent the movable part from rebounding excessively and the contacts from opening.

Further, the first link, the drive lever having the guide hole, and the second link connected to the first link via the connecting pin inserted in the guide hole and pivotally supported at a predetermined point on the drive lever. Since the toggle link is configured by and the spring of the pressure contact device is stored by the relative movement of the connecting pin in the guide hole, the contact pressure can be obtained by the operating force multiplied by the toggle effect. . Therefore, even in the case of a high-voltage large-capacity vacuum switch that requires a high contact pressure load, the required load can be easily obtained with a small operating force. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve.
Moreover, various desired operating characteristics can be obtained by changing the mounting posture of the second link.

In the closed state of the vacuum switch tube, the internal angle formed by the straight line connecting the output point and the connecting pin and the axis acting on the spring is set to be larger than the right angle and smaller than 180 degrees. Since the opening drive component force can be generated at the time, a quick opening operation can be obtained.

In the closed state of the vacuum switch tube, the straight line connecting the output point and the connecting pin and the axial line of the spring are arranged in a substantially straight line, so that the contact state is stable and stable. Can be held.

By making the predetermined angle between the line of action of the spring of the pressure contact device connecting the fixed pin of the drive lever and the connecting pin and the axis of the second link larger than a right angle and smaller than 180 degrees, the contact pressure is increased. It is possible to obtain the characteristic that the contact pressure load in the process is relatively increased at the completion of the charging operation.

By setting the above predetermined angle to be smaller than a right angle and larger than 0 degree, it is possible to obtain a characteristic that the contact pressure load in the contact pressure step is relatively reduced at the completion of the closing operation.

Further, a toggle link is constituted by the first link and the drive lever, and is supported by the same fixed pin as the drive lever and provided at a position angularly displaced in the rotational direction of the drive lever, and the connecting pin. The contact pressure spring held along the spring guide between the two is configured to store energy by stopping the rotation of the spring receiving member by the stopper from the start of the contact pressure process, so the operating force multiplied by the toggle effect The contact pressure can be obtained by. Therefore, even in the case of a high-voltage large-capacity vacuum switch that requires a high contact pressure load, the required load can be easily obtained with a small operating force. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve. Further, desired opening / closing characteristics can be obtained by changing the mounting angle of the spring receiving member and the mounting position of the stopper. Further, since the opening drive force can be changed according to the angle of the action axis of the contact pressure spring, desired characteristics can be obtained with a simple configuration.

In the closed state of the vacuum switch tube, the output point, the connecting pin and the fixing pin are arranged in a substantially straight line,
Since the contact pressure spring is configured to urge the connecting pin in the direction corresponding to the opening direction of the vacuum switch tube, the contact pressure spring is urged during the opening drive, and a quick opening operation can be obtained.

Since the spring guide is constructed by screwing at least two axially separated members, the timing at which the contact pressure first acts can be easily changed by adjusting the screwing. it can.

Since the other end of the spring receiving member is supported by the length-adjustable supporting member, the support position of one end of the spring receiving member is moved to, for example, the contact pressure of each phase in the large-sized multiphase switch. Since the contact timing can be changed subtly, the adjustment is easy.

Also, a toggle link is formed by the first link and the drive lever, the spring receiving member is provided on the drive lever, one end is connected to the connecting pin, and the other end is axially relative to the spring receiving member. Since the contact pressure spring is sandwiched between the connecting pin and the spring receiving member along the slidably held spring guide, the contact pressure can be obtained by the operating force multiplied by the toggle effect. Therefore, even in the case of a high-voltage large-capacity vacuum switch that requires a high contact pressure load, the required load can be easily obtained with a small operating force. In addition, the entire operating device can be made compact by reducing the maximum operating load, and the final closing operation speed of the movable contact can be reduced, so that the life of the vacuum switch is extended and reliability is improved. Improve. Further, since the pressure contact device has a small number of constituent elements and a simple structure, a compact and inexpensive structure can be achieved.

By configuring the guide direction of the guide hole to have a predetermined angle within a range from 0 degree to a right angle with respect to the straight line connecting the connecting pin and the fixing pin, any contact pressure process characteristic can be simplified. Can be provided.

Also, since the toggle link is constituted by the first link and the drive lever and the pressure contact device is connected between the connecting pin and the frame of the vacuum switch, the equivalent movable weight can be reduced. Therefore, high speed operation can be realized in a short process. It is easy to adjust the contact pressure.

Since the pressure contact device is configured to be connected to the connecting pin via the thrust link which is arranged so as to have a predetermined angle with respect to the drive lever when the vacuum switch tube is closed, The contact pressure and the opening drive force can be changed according to the arrangement angle. In this way, it is possible to provide the contact pressure and the opening driving force that are most suitable for the switches having various ratings and characteristics.

The pressure contact device biases the contact pressure spring by a spring link whose one end is axially supported, and the connection point between the thrust link and the spring link is in contact with the position where the spring link is axially supported and the spring link. Since it is arranged at an intermediate point between the engagement point position with the pressure spring, the acting force of the contact pressure spring is increased and transmitted to the thrust link. Therefore, even a contact pressure spring with a small load can provide a large contact pressure and an opening driving force.

The pressure contact device urges the pressure contact spring by a spring link whose one end is axially supported, and the engagement point position between the spring link and the pressure contact spring is the connection point between the thrust link and the spring link. Since the thrust link is located at an intermediate point between the axially supported position of the spring link, the axial line of the thrust link is shorter than the axial line of the drive lever, and the rotational position viewed from the connecting pin is substantially the same, The space occupied by the pressure contact device becomes compact.

The first link and the drive lever form a toggle link, one end of which is connected to the connecting pin, and the other end of which is connected to the fixed part of the vacuum switchgear. Since a spring link that is connected to the thrust link and forms a V-shape together with the thrust link is provided, the contact pressure load of the contact pressure spring becomes very large and is transmitted to the connecting pin. Therefore, even if a large contact pressure is required, a contact pressure spring with a small load is sufficient. Further, by changing the toggle angle of the toggle link constituted by the spring link and the thrust link, various contact pressure characteristics can be easily provided.

At the bending connection point, a contact pressure device that applies a spring load in the output direction of the toggle link device by the operating force supplied from the operating means when the bending degree of the toggle link device is opened to a predetermined angle or more is connected. Therefore, the contact pressure is provided together with the toggle effect, reducing the burden on the operating means.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a state when an operating mechanism of a vacuum switch according to a first embodiment of the present invention is opened.

FIG. 2 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the first embodiment is closed.

FIG. 3 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the second embodiment is closed.

FIG. 4 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the third embodiment is turned on.

FIG. 5 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the fourth embodiment is closed.

6 is a cross-sectional view of a part of the operating mechanism shown in FIG.

FIG. 7 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the fifth embodiment is turned on.

8 is an enlarged view of a part of the operating mechanism shown in FIG.

FIG. 9 is a diagram showing only a main diagram of a modified example of the operating mechanism of the vacuum switch according to the fifth embodiment.

FIG. 10 is a diagram showing only a main diagram of a modified example of the operating mechanism of the vacuum switch according to the fifth embodiment.

FIG. 11 is a diagram showing only a main diagram of a modified example of the operating mechanism of the vacuum switch according to the fifth embodiment.

FIG. 12 is a diagram showing only a main diagram of a modified example of the operating mechanism of the vacuum switch according to the fifth embodiment.

FIG. 13 is obtained by the configuration shown in FIGS.
It is a graph which shows the relationship of a contact pressure process and contact pressure.

FIG. 14 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the sixth embodiment is opened.

FIG. 15 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the sixth embodiment is closed.

16 is a graph showing an example of contact pressure process characteristics according to Example 6. FIG.

FIG. 17 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the seventh embodiment is opened.

FIG. 18 is a side sectional view showing a state when the operation mechanism of the vacuum switch according to the seventh embodiment is turned on.

FIG. 19 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the eighth embodiment is turned on.

FIG. 20 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the ninth embodiment is opened.

FIG. 21 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the tenth embodiment is opened.

FIG. 22 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the tenth embodiment is turned on.

FIG. 23 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the eleventh embodiment is turned on.

FIG. 24 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the twelfth embodiment is closed.

FIG. 25 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the thirteenth embodiment is closed.

FIG. 26 is a side sectional view showing a state when the operating mechanism of the vacuum switch according to the fourteenth embodiment is turned on.

FIG. 27 is a graph showing changes in operating load at the time of a closing operation in Examples 1 to 14 in comparison with a conventional one.

FIG. 28 is a side sectional view showing the structure of a conventional vacuum switch.

29 is a front view of the vacuum switch shown in FIG. 28. FIG.

[Explanation of symbols]

1 vacuum switch tube, 3 movable contacts, 5 insulating rods, 6
Guide link, 8 connecting pin (floating connecting point), 9 toggle link, 10 1st link, 11 2nd link, 1
2 fulcrum, 13 connecting pin (bending connecting point), 15 operation rod, 15a guide part, 16 pressure contact device, 19 pressure contact spring, 23 guide hole, 24 stopper, 27 connection point, 31 drive shaft, 34 operation lever, 35 Pivot point,
40 support plate, 61 second link, 62 drive lever,
62a guide hole, 62b upper end side, 63 operation rod, 64 lever, 65 pin, 66 fulcrum, 71 drive lever, 71a guide hole, 72 spring guide, 73
Spring receiving member, 75 stopper, 76 rod end,
77 support member, 78 bolt, 79 support member, 80
Drive lever, 80a guide hole, 81 drive lever,
81a guide hole, 82 thrust link, 83 spring link, 89 support member, 91 frame.

Claims (31)

[Claims] 1. An insulating rod made of an insulating material, which is connected to a movable contact of a vacuum switch tube, a toggle link device whose output end is connected to the insulating rod, and an input end of the toggle link device. The engaging operation means and the spring to be stored in the power transmission path from the operation means to the input end when the operation means operates in the direction to extend the toggle link device. A vacuum switch operating mechanism that includes a pressure contact device including the. 2. An insulating rod made of an insulating material, which is connected to the movable contact of the vacuum switch tube, the other end of the first link having one end connected to the insulating rod, and the second end having one end as a fixed fulcrum. The other end of the link is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the open state of the vacuum switch tube, and extends substantially linearly in the closed state of the vacuum switch tube. A toggle link device having a shape, an operation rod that engages with the movable input point and operates in a substantially linear manner to drive the toggle link device, and the operation rod operates in a direction to extend the toggle link device. At this time, a vacuum switch operating mechanism comprising: a pressure contact device including a spring to be stored in the power transmission path from the operation rod to the movable input point. 3. The operating rod includes the first link and the second link.
The operating mechanism of the vacuum switch according to claim 2, wherein the operating mechanism is arranged in an angle range sandwiched by the link. 4. The operating mechanism of the vacuum switch according to claim 2, further comprising a stopper for limiting the rotation of the first link or the second link within a predetermined range. 5. The operating mechanism of the vacuum switch according to claim 2, further comprising a guide link having the other end that rotates with one fixed end as a fulcrum and which is connected to the end of the insulating rod. 6. An insulating rod made of an insulating material, which is connected to the movable contact of the vacuum switch tube, the other end of the first link whose one end is connected to the insulating rod, and the second end whose one end is a fixed fulcrum. A toggle link device configured by connecting the other end of the link to each other, having a bent shape in the open state of the vacuum switch tube, and having a shape that extends substantially linearly in the closed state of the vacuum switch tube, An operating rod that engages with a connecting point provided on the second link and operates in a substantially linear manner to drive the toggle link device; and when the operating rod operates in a direction to extend the toggle link device. A vacuum switch operating mechanism including: a pressure contact device including a spring to be stored in the power transmission path from the operation rod to the connection point. 7. An insulating rod made of an insulating material, which is connected to the movable contact of the vacuum switch tube, and one end of which is connected to the insulating rod through a connecting pin and the other end of which is connected to the insulating rod. The other end of the second link serving as a fixed fulcrum is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the opened state of the vacuum switch tube, and in the closed state of the vacuum switch tube. A toggle link device having a shape that extends substantially linearly, an operating rod that engages the movable input point and operates in a substantially linear manner to drive the toggle link device, and the operating rod operates the toggle link device. When operating in the direction of extension, a contact pressure device including a spring to be stored in the power transmission path from the operation rod to the movable input point, and the connecting pin to move the movable contact. Vacuum switch operating mechanism comprising a holding member having a hole for holding only slidably in stroke direction. 8. An insulating rod made of an insulating material, which is connected to the movable contact of the vacuum switch tube, the other end of the first link whose one end is connected to the insulating rod, and the second end which has one end as a fixed fulcrum. The other end of the link is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the open state of the vacuum switch tube, and extends substantially linearly in the closed state of the vacuum switch tube. A toggle link device having a shape, an operation rod having a hole for loosely fitting the movable input point, and a guide portion for directly driving the movable input point in the opening direction of the vacuum switch by the hole end wall portion, An operating mechanism for a vacuum switch, comprising: a pressure contact device including a spring for transmitting the driving force when the operating rod is closed to a movable input point and accumulating the force. 9. An insulating rod made of an insulating material, which is connected to the movable contact of the vacuum switch tube, the other end of the first link whose one end is connected to the insulating rod, and the second end which is pivotally supported at one end. The other end of the link is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the open state of the vacuum switch tube, and extends substantially linearly in the closed state of the vacuum switch tube. A toggle link device having a shape, an operation lever that engages with the movable input point and rotates to drive the toggle link device, and the operation rod operates in a direction to extend the toggle link device, An operating mechanism for a vacuum switch, comprising: a pressure contact device including a spring to be stored in the power transmission path from the operation rod to the movable input point. 10. An insulating rod made of an insulating material, connected to a movable contact of a vacuum switch tube, another end of a first link having one end connected to the insulating rod, and a second end having a floating fulcrum at one end. The other end of the link is connected to each other, and the connecting point is configured as a movable input point, and has a bent shape in the open state of the vacuum switch tube, and extends substantially linearly in the closed state of the vacuum switch tube. A toggle link device having a shape, an operating lever that engages with the movable input point and rotates to drive the toggle link device, and that holds the floating fulcrum, and the operating rod extends the toggle link device. And a pressure contact device including a spring to be stored in the power transmission path from the operation rod to the movable input point when operating in a direction. 11. The floating fulcrum is provided at a position deviating from a line segment connecting a rotation fulcrum of the operation lever and the movable input point at an initial position of a contact pressure stroke of the movable contactor. The operating mechanism of the vacuum switch according to claim 10. 12. An insulating rod made of an insulating material, which is connected to a movable contact of a vacuum switch tube, and the other end of a first arm whose one end is axially attached to the insulating rod.
A toggle link device, in which one end is pivotally supported by a fixing pin and the other end of the second arm is rotatably loosely fitted to each other, and the connecting position is a bending connecting point, and the bending connecting point is An operating mechanism for a vacuum switch, comprising: a pressure contact device including a spring to be charged by relative movement within the loose fitting connection range; and an operating means connected to the toggle link device. 13. The other end of a first arm whose one end is axially attached to a movable contact side movable member of a vacuum switch tube, and the other end of a second arm whose one end is pivotally supported by a fixing pin. Part and the second arm part are rotatably and loosely connected to each other via a connecting pin inserted into a guide hole formed in the other end part of the second arm part so as to have a predetermined directionality, and the position of the connecting pin is changed. A toggle link device serving as a bending connection point, a contact pressure device including a spring to be stored by relative movement of the connection pin in the guide hole, and an operating means connected to the toggle link device. The operating mechanism of the provided vacuum switch. 14. The guide hole locks the connecting pin at one end of the guide hole until the start of the contact pressure step at the time of turning on the vacuum switch tube, and the connecting pin is locked as the contact pressure step progresses. A hole shape that guides along the predetermined directionality and stops the connecting pin at an intermediate position where a gap is formed between the connecting pin and the other end side when the vacuum switch tube is closed. The operating mechanism of the vacuum switch according to claim 13. 15. A first member in which one end is axially attached to a movable contact side movable member of a vacuum switch tube, and the axial attachment point serves as an output point.
The link, the drive lever having one end rotatably supported by a fixed pin, and the other end having a guide hole formed with a predetermined directionality, and the connecting pin inserted through the guide hole to the first link. Connected to the other end of the vacuum switch tube and in a state where the vacuum switch tube is open, the point is on a substantially extended line of a straight line connecting the output point and the connecting pin, and the connecting pin and the fixed pin are connected to the extended line. A second link pivotally supported at a predetermined point on the drive lever such that the connecting straight line has a predetermined angle, and a spring to be stored by relative movement of the connecting pin in the guide hole are included. A vacuum switch operating mechanism comprising a pressure contact device and operating means connected to the drive lever. 16. The interior angle formed by the straight line connecting the output point and the connecting pin and the axis acting on the spring in the closed state of the vacuum switch tube is larger than a right angle 18
The operating mechanism of the vacuum switch according to claim 15, wherein the operating mechanism is smaller than 0 degree. 17. The vacuum according to claim 15, wherein, in the closed state of the vacuum switch tube, a straight line connecting the output point and the connecting pin and an axis line on which the spring acts are substantially aligned with each other. Switch operating mechanism. 18. The operating mechanism for a vacuum switch according to claim 15, wherein the predetermined angle is larger than a right angle and smaller than 180 degrees in the initial state of the contact pressure step. 19. The operating mechanism of the vacuum switch according to claim 15, wherein the predetermined angle is smaller than a right angle and larger than 0 degree in the initial state of the contact pressure step. 20. A first member in which one end is axially attached to a movable contact side movable member of a vacuum switch tube, and the axial attachment point serves as an output point.
A link and a guide hole, one end of which is axially supported by a fixed pin, and the other end of which has a guide direction formed with a predetermined directionality, and the other of the first link through the connecting pin inserted in the guide hole. A drive lever connected to the end portion to form a toggle link, a spring receiving member provided at a position where one end is pivotally supported by the fixed pin and angularly displaced in the rotation direction of the drive lever, and one end is connected to the connecting pin. A spring guide axially supported and the other end of which is held slidably in the axial direction with respect to the spring receiving member, and a contact pressure spring sandwiched between the connecting pin and the spring receiving member along the spring guide. An operating mechanism of a vacuum switch, comprising: a stopper for stopping the rotation of the spring receiving member from the start of the pressure contact step of the vacuum switch tube; and an operating means connected to the drive lever. 21. In the closed state of the vacuum switch tube, the output point, the connecting pin, and the fixing pin are arranged in a substantially straight line, and the contact pressure spring causes the connecting pin to move in the opening direction of the vacuum switch tube. The operating mechanism of the vacuum switch according to claim 20, wherein the operating mechanism is urged in a direction corresponding to. 22. The operating mechanism of the vacuum switch according to claim 20, wherein the spring guide is formed by screwing at least two axially separated members. 23. The operating mechanism of the vacuum switch according to claim 20, wherein the other end of the spring receiving member is supported by a supporting member whose length is adjustable. 24. A first member of which one end is axially attached to a movable contact side movable member of a vacuum switch tube and whose axial attachment point is an output point.
A link and a guide hole, one end of which is axially supported by a fixed pin, and the other end of which has a guide direction formed with a predetermined directionality, and the other of the first link through the connecting pin inserted in the guide hole. A drive lever connected to the end, a spring receiving member provided on the drive lever, one end connected to the connecting pin, and the other end held slidably in the axial direction with respect to the spring receiving member. An operating mechanism of a vacuum switch, comprising: a spring guide, a contact pressure spring sandwiched between the connecting pin and the spring receiving member along the spring guide, and operating means connected to the drive lever. 25. The vacuum switch according to claim 24, wherein the guide direction of the guide hole has a predetermined angle in a range from 0 degree to a right angle with respect to a straight line connecting the connecting pin and the fixing pin. Operating mechanism. 26. A first member in which one end is axially attached to a movable contact side movable member of a vacuum switch tube, and the axial attachment point serves as an output point.
A link and a guide hole, one end of which is axially supported by a fixed pin, and the other end of which has a guide direction formed with a predetermined directionality, and the other of the first link through the connecting pin inserted in the guide hole. A drive lever connected to the end, a contact pressure device connected between the connecting pin and the frame of the vacuum switch, and generating contact pressure according to the position of the connecting pin, and connected to the drive lever. An operating mechanism for a vacuum switch equipped with operating means. 27. The pressure contact device is connected to the connecting pin via a thrust link arranged so as to have a predetermined angle with respect to the drive lever when the vacuum switch tube is closed. 3. The method according to claim 2,
6 vacuum switch operating mechanism. 28. The pressure contact device biases a pressure contact spring by a spring link whose one end is pivotally supported, and a connection point between the thrust link and the spring link is a position where the spring link is pivotally supported. And at an intermediate point between the engagement point positions of the spring link and the contact pressure spring.
6 vacuum switch operating mechanism. 29. The pressure contact device biases the contact pressure spring by a spring link whose one end is axially supported, and the engagement point position between the spring link and the pressure contact spring is the thrust link and the spring. It is located at an intermediate point between the connection point with the link and the axially supported position of the spring link, the axial line of the thrust link is shorter than the axial line of the drive lever, and the rotational position viewed from the connecting pin is substantially the same. 2. The method according to claim 2, wherein
6 vacuum switch operating mechanism. 30. A first member in which one end is axially attached to a movable contact side movable member of a vacuum switch tube, and the axial attachment point serves as an output point.
A link and a guide hole, one end of which is axially supported by a fixed pin, and the other end of which has a guide direction formed with a predetermined directionality, and the other of the first link through the connecting pin inserted in the guide hole. A drive lever connected to the end, a thrust link having one end connected to the connecting pin, one end connected to a fixed portion of the vacuum switchgear, the other end connected to the other end of the thrust link, A spring link that forms a V-shape with the thrust link, a contact pressure device that engages with the spring link to generate contact pressure according to the position of the connecting pin, and an operating means connected to the drive lever, Vacuum switch operation mechanism equipped with. 31. The other end of a first arm portion, one end of which is pivotally attached to a movable contact side movable member of a vacuum switch tube, and the other end of a second arm portion, one end portion of which is pivotally supported by a fixing pin. And a toggle link device in which the connecting portions are rotatably connected to each other, and the connection position is a bending connection point, an operating means connected to the toggle link device, and the toggle link device connected to the bending connection point. A contact pressure device having a contact pressure spring that exerts a spring load in the output direction of the toggle link device based on the operation force supplied from the operation means when the bending degree of the toggle link device is opened to a predetermined angle or more. Vacuum switch operating mechanism.