TWI570759B - Circuit breakers, actuators and switchgear - Google Patents

Description

Circuit breaker, actuator and switch device

The present invention relates to a circuit breaker, an actuator, and a switching device, and more particularly to a circuit breaker, an actuator, and a switching device having a structure for supporting a movable conductor or a shaft bearing for performing a stable switching operation.

In the case of the switching device for the interruption and the access operation of the electric circuit, there are various types of machines depending on the application. For example, the vacuum circuit breaker shown in Patent Document 1 or Patent Document 2 is used for comparison. High voltage switching device.

The vacuum circuit breaker of the switching device 1 is a vacuum valve (circuit breaker) that performs switching of an electrical circuit in a container that holds a vacuum, and an electromagnetic induction that gives a switching operation force, as described in Patent Documents 1 and 2. The actuator is mainly composed.

The configuration of a conventional vacuum circuit breaker will be described using FIG.

As shown in the figure, the vacuum circuit breaker 50 is roughly configured by a vacuum valve (circuit breaker) 51, an electromagnetic actuator 52, and a link mechanism 53 that connects the two.

Next, the vacuum valve (circuit breaker) 51 is used as follows a vacuum container 3; a fixed electrode 1 fixed to the vacuum container 3 via a fixed conductor 43 and disposed in the vacuum container 3; and a movable electrode 2 disposed opposite to the fixed electrode 1 to The fixed electrode 1 is connected or disconnected in such a manner as to be disconnected, and is fixed to the distal end portion of the movable conductor 4; the tubular circuit breaker bearing 6 is fixed by the movable electrode 2 The movable conductor 4 is supported by a dry bush which is slidable and fixed to the bottom of the vacuum vessel 3 and is internally solid-lubricated; and a bellows 5, one end of which is fixed to the vacuum vessel 3, The other end is attached to the movable conductor 4, and follows the movement of the movable conductor 4, and maintains the vacuum inside the vacuum vessel 3.

On the other hand, the electromagnetic actuator 52 has a movable iron core 18 and a fixed iron core 27 disposed opposite to each other, and a coil 17 that is separated from or in contact with the fixed iron core 27 in response to an electromagnetic force, and is formed from the coil 17 The path of the generated magnetic field and the permanent magnet 19 for simultaneously generating the electromagnetic force for maintaining the contact state of the movable iron core 18 and the fixed iron core 27, and the periphery of the coil 17 as the side legs and simultaneously forming the magnetic flux generated from the coil 17 The iron cover members 7, 44 of the path; and the shaft 8 is coupled to the movable iron core 18 to transmit the driving force with the electromagnetic force generated from the electromagnet; the cylindrical actuation The bearing 22 is formed by a dry bushing to which solid lubrication is applied to the inner surface of the shaft 8 which constitutes the upper portion of the electromagnetic actuator 52; and a cylindrical actuator bearing 21 is utilized. A dry bushing of solid lubrication is applied to the inner surface of the fixed iron core 27 supported on the lower portion of the electromagnetic actuator 52; and, regarding the shaft 8, is formed by: the upper side and the lower side The diameter is thick, and the inner diameter of the actuator bearing 21 of the lower portion of the support shaft 8 is larger than the inner diameter of the actuator bearing 22 of the upper portion of the support shaft 8. Further, a trip spring 20 is attached to the shaft 8, and the spring 20 is stored in the closing motion to store the resilience. The resilience of the trip spring 20 is used during the opening operation.

Next, the movable conductor 4 of the vacuum valve (circuit breaker) 51 is connected to the first connecting shaft 10 via the link pin 13; on the other hand, the shaft 8 of the electromagnetic actuator 52 is interposed between the connecting pin 12 and The second connecting shaft 9 is coupled to the second connecting shaft 9 and the second connecting shaft 9 is connected to the shafts 14 of the link mechanism 53 to be rotatably supported by the rods 11 and the support shafts 15 and 16 . The driving force generated by the electromagnetic actuator 52 is transmitted to the vacuum valve (breaker) 51 through the link mechanism 53, and the fixed electrode 1 and the movable electrode 2 of the vacuum valve (breaker) 51 are disconnected. To make current access or block.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2007-179841

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2004-247093

By the way, the movable conductor 4 or the shaft 8 is reciprocated at a high speed of about 1 to 5 m/sec. In order to smoothly perform the reciprocating motion, it is necessary to manage the movable conductor 4 with high precision or Is the axis 8 The difference in outer diameter between the outer diameter of the circuit breaker bearing 6 and the actuator bearings 21, 22, and the position of the breaker bearing 6 and the actuator bearings 21, 22.

In particular, it is necessary to note that the circuit breaker bearing 6 does not have a partial contact at the sliding portion due to the difference between the outer diameter of the movable conductor 4 and the inner diameter of the bearing. Further, at the same time, it is necessary to note that the difference in size is too small and the degree of freedom of rotation of the movable conductor 4 is small. Therefore, partial contact occurs between the fixed electrode 1 and the movable electrode 2, and no contact failure occurs.

That is, as shown in FIG. 2, when the movable angle of the movable conductor 4 is to be ±θ, the difference between the outer diameter of the movable conductor 4 and the inner diameter of the circuit breaker bearing 6 (d), and the circuit breaker bearing The ratio d/L of the axial length (L) of 6 is preferably set to tan θ. However, in order to increase the movable angle θ of the movable conductor 4 and increase d excessively, the amount of wear due to the contact of the circuit breaker bearing 6 of the movable conductor 4 becomes large, and the movable angle θ of the movable conductor 4 is only It can be increased as much as possible within the range that satisfies the bearing life requirements.

Further, it is necessary to manage the difference in size between the inner diameter of each bearing and the outer diameter of the shaft 8 for the actuator bearings 21 and 22 used in the two groups of the electromagnetic actuators 52, and to manage the two groups. The central axes of the actuator bearings 21 and 22 are highly coincident, and partial contact at the sliding portion does not occur.

The present invention has been made in view of the above problems, and it is an object of the invention to provide a smooth reciprocating motion of a movable conductor or a shaft for a long period of time even when a large dimensional tolerance is set, and it is difficult to occur in an electrode portion. Poor contact breakers and actuators and switching devices.

In order to achieve the above object, the circuit breaker of the present invention comprises: a container; a fixed electrode interposed between the fixed conductor and the container, and disposed in the container; and a movable electrode disposed opposite to the fixed electrode to Interconnecting or blocking current is performed in connection with the fixed electrode, and is fixed to a distal end portion of the movable conductor; and a bearing that supports the movable conductor that fixes the movable electrode to be slidable, And the bearing is fixed to the container; the bearing is a spherical bearing having a hole that is inserted into the movable conductor and supports the movable conductor at a central portion, and the support surface of the movable conductor of the hole is a flat surface, and the outer surface becomes The curved surface shape moves in accordance with the eccentricity of the movable conductor when the movable conductor is eccentric.

Further, in order to achieve the above object, an actuator according to the present invention includes: an electromagnet having: a movable iron core and a fixed iron core disposed to face each other, and the movable iron core is separated from or in contact with the fixed iron core in response to an electromagnetic force; a coil, a permanent magnet that forms a path from a magnetic field generated by the coil and simultaneously generates an electromagnetic force for maintaining a contact state between the movable iron core and the fixed iron core, and a side leg to cover the periphery of the coil while forming the same a cover member for the path of the magnetic flux generated by the coil; a shaft coupled to the movable core, transmitting a driving force with an electromagnetic force generated from the electromagnet; and 2 bearings at the device The upper and lower sides support the shaft; each of the two bearings is a spherical bearing, and has a hole at the center portion that is inserted through the shaft to support the shaft body, and the hole is The support surface of the shaft is a flat surface, and the outer surface has a curved shape, and when the shaft is eccentric, the eccentricity of the shaft is moved.

Further, in order to achieve the above object, the switch device of the present invention includes: the circuit breaker having the above configuration, the actuator having the above configuration, and a link mechanism connecting the circuit breaker and the actuator; The lever mechanism transmits the driving force of the actuator to the circuit breaker, and accesses or blocks the current from the fixed electrode and the movable electrode of the circuit breaker.

According to the present invention, regarding the size of the movable conductor or the shaft or the position at which the bearing is disposed, even if a larger error than the conventional one is allowed, the reciprocating motion of the movable conductor or the shaft can be maintained for a long period of time, and it is difficult to occur. The effect of poor contact at the electrode portion.

1‧‧‧Fixed electrode

2‧‧‧ movable electrode

3‧‧‧Vacuum container

4‧‧‧ movable conductor

5‧‧‧ Bellows

6‧‧‧Circuit breaker bearing

7‧‧‧iron cover

8‧‧‧Axis

9‧‧‧2nd connecting shaft

10‧‧‧1st connecting shaft

11‧‧‧ pole

12, 13‧‧‧ Link pin

14, 15, 16‧‧‧ support shaft

17‧‧‧ coil

18‧‧‧ movable iron core

19‧‧‧ permanent magnet

20‧‧‧Bounce spring

21, 22‧‧‧Actuator bearings

23‧‧‧1st actuator side spherical bearing

24‧‧‧2nd actuator side spherical bearing

25, 35, 37, 46‧‧‧ first cover

26, 36, 38, 47‧‧‧2nd cover

27‧‧‧Fixed core

28‧‧‧ boards

29, 31‧‧‧ countersunk hole

32‧‧‧1st breaker side spherical bearing

33‧‧‧2nd breaker side spherical bearing

34‧‧‧ adjuster

35~38‧‧‧Spherical bearing cover parts

39‧‧‧Roller

40~42‧‧‧Guide

43‧‧‧Fixed conductor

44‧‧‧iron cover

48‧‧‧ frame

50‧‧‧Vacuum circuit breaker

51‧‧‧Vacuum valve (circuit breaker)

52‧‧‧Electromagnetic actuator

53‧‧‧ linkage mechanism

Fig. 1 is a cross-sectional view showing the configuration of a vacuum interrupter of a conventional switching device.

[Fig. 2] is a view for explaining a movable angle (θ) of a movable conductor in a conventional bearing structure, a difference (d) between an outer diameter of a movable conductor and an inner diameter of a breaker bearing, and an axial direction of the breaker bearing 6 A cross-sectional view of the bearing near the length (L) relationship.

[Fig. 3] is a view showing the first embodiment of the switch device of the present invention. Cutaway view of the vacuum circuit breaker.

[Fig. 4] is a movable angle (θ) of the movable conductor in the spherical bearing used in the vacuum circuit breaker of the first embodiment of the switch device of the present invention, the outer diameter of the movable conductor, and the inside of the circuit breaker bearing A cross-sectional view of the vicinity of the spherical bearing in relation to the difference in diameter (d) and the axial length (L) of the breaker bearing.

Fig. 5 is a cross-sectional view showing an electromagnetic actuator of the vacuum circuit breaker of the first embodiment of the switch device of the present invention.

Fig. 6 is a cross-sectional view showing the vacuum circuit breaker of the second embodiment of the switch gear of the present invention.

Fig. 7 is a cross-sectional view showing the vacuum circuit breaker of the third embodiment of the switch gear of the present invention.

[Fig. 8] is a movable angle (θ) of the movable conductor in the spherical bearing used in the vacuum circuit breaker of the third embodiment of the switch device of the present invention, the outer diameter of the movable conductor, and the inside of the circuit breaker bearing A cross-sectional view of the vicinity of the spherical bearing in relation to the difference in diameter (d) and the distance between the breaker bearing and the link pin (L).

Fig. 9 is a cross-sectional view showing the vacuum circuit breaker of the fourth embodiment of the switch gear according to the present invention.

Fig. 10 is a cross-sectional view showing the vacuum circuit breaker of the fifth embodiment of the switch gear of the present invention.

Hereinafter, the break of the present invention will be described based on the illustrated embodiment. Roads and actuators and switching devices. It is to be noted that the same reference numerals are used for the same reference numerals, and the same reference numerals are used for the same constituent parts in the respective embodiments.

[Example 1]

Fig. 3 shows a vacuum circuit breaker 50 of the first embodiment of the switch gear of the present invention. As shown in the figure, the vacuum circuit breaker 50 of the present embodiment is roughly configured by a vacuum valve (circuit breaker) 51, an electromagnetic actuator 52, and a link mechanism 53 that connects the two.

Next, the vacuum valve (circuit breaker) 51 is configured by a vacuum vessel 3, a fixed electrode 1 fixed to the vacuum vessel 3 via a fixed conductor 43, and disposed in the vacuum vessel 3; a movable electrode 2, which is disposed opposite to the fixed electrode 1 to perform current access or interruption in such a manner as to be disconnected from the fixed electrode 1, and is fixed to the end portion of the movable conductor 4; The first breaker side spherical bearing 32 and the second breaker side spherical bearing 33 are arranged in series so as to be slidably supported by the movable conductor 4 to which the movable electrode 2 is fixed, and have a movable conductor 4 inserted through the center portion. The hole, the support surface of the movable conductor 4 of the hole is a flat surface, and the outer surface has a curved shape, and moves away from the eccentricity of the movable conductor 4 when the movable conductor 4 is eccentric; and the bellows 5 is fixed at one end thereof To the vacuum vessel 3, the other end is attached to the movable conductor 4, and follows the movement of the movable conductor 4, and maintains the vacuum inside the vacuum vessel 3.

The first circuit breaker side spherical bearing 32 is utilized and The first cover member 25 having the outer surface of the first circuit breaker side spherical bearing 32 has a substantially curved surface shape and is slidably supported, and the second circuit breaker side spherical bearing 33 is used for the second circuit breaker side spherical bearing. The second cover member 26 whose outer surface of the outer surface 33 is slightly curved is supported to be slidable.

Further, between the first cover member 25 and the second cover member 26, an adjuster 34 for adjusting the distance between the first circuit breaker side spherical bearing 32 and the second circuit breaker side spherical bearing 33 is provided, and these first cover members are provided. The second cover member 26 and the adjuster 34 are integrally formed by a bolt (not shown) and fixed to the bottom of the vacuum container 3.

On the other hand, the electromagnetic actuator 52 has a movable iron core 18 and a fixed iron core 27 disposed opposite to each other, and a coil 17 that is separated from or in contact with the fixed iron core 27 in response to an electromagnetic force, and is formed from the coil 17 The path of the generated magnetic field and the permanent magnet 19 for simultaneously generating the electromagnetic force for maintaining the contact state of the movable iron core 18 and the fixed iron core 27, and the periphery of the coil 17 as the side legs and simultaneously forming the magnetic flux generated from the coil 17 The iron cover members 7, 44 of the path; and the shaft 8 is coupled to the movable iron core 18 to transmit the driving force with the electromagnetic force generated from the electromagnet; and The first actuator side spherical bearing 23 and the second actuator side spherical bearing 24 support the shaft 8 at the upper and lower portions of the electromagnetic actuator 52.

Each of the first actuator side spherical bearing 23 and the second actuator side spherical bearing 24 is configured such that a central portion is inserted through the shaft 8 and has a hole for supporting the shaft 8, and a support surface of the shaft 8 of the hole For the plane, and, The outer surface has a curved shape, and when the shaft 8 is eccentric, it follows the eccentricity of the shaft 8 and moves.

Further, the shaft 8 is formed such that the diameter of the lower portion is thicker than the upper portion, and the inner diameter of the second actuator side spherical bearing 24 of the upper portion of the support shaft 8 is the first of the lower portion of the support shaft 8. The inner diameter of the actuator side spherical bearing 23 is large.

Further, each of the first actuator side spherical bearing 23 and the second actuator side spherical bearing 24 is formed by the outer surface of the first actuator side spherical bearing 23 and the second actuator side spherical bearing 24 The first cover member 46 and the second cover member 47 which are slightly in the same curved shape are supported to be slidable, and the upper second actuator side spherical bearing 24 is fixed to the electromagnetic component via the second cover member 47. The plate member 28 of the body 7 and the lower first actuator side spherical bearing 23 are fixed to the fixed core 27 via the first cover member 46.

Further, a trip spring 20 is attached to the shaft 8, and the spring 20 is stored in the closing motion to store the resilience. The resilience of the trip spring 20 is used during the opening operation.

Next, the movable conductor 4 of the vacuum valve (circuit breaker) 51 is connected to the first connecting shaft 10 via the link pin 13; on the other hand, the shaft 8 of the electromagnetic actuator 52 is interposed between the connecting pin 12 and The second connecting shaft 9 is coupled to the second connecting shaft 9 and the second connecting shaft 9 is connected to the shafts 14 of the link mechanism 53 to be rotatably supported by the rods 11 and the support shafts 15 and 16 . The driving force generated by the actuator actuator 52 is transmitted to the vacuum valve (circuit breaker) 51 through the link mechanism 53 to actuate the vacuum valve The fixed electrode 1 of the (circuit breaker) 51 is disconnected from the movable electrode 2 to perform current access or interruption.

Next, the operation in the vacuum circuit breaker 50 described above will be described.

First, the switching operation of the fixed electrode 1 and the movable electrode 2 is performed by the electromagnetic actuator 52. The movable conductor 4 of the shaft 8 and the movable electrode 2 is connected to the shaft 9, 10, the rod 11, and the link pin. 12, 13, support shaft 14~16 to make a joint, joint action.

In other words, the closed-pole operation attracts the movable iron core 18 attached to the shaft 8 by exciting the coil 17 in the electromagnetic actuator 52; the holding of the closed state is performed by the magnetic force of the permanent magnet 19. . Because of the closed-loop action, the spring force of the trip spring 20 mounted on the shaft 8 is stored with a resilience, and the aforementioned electromagnetic force or the magnetic force of the permanent magnet 19 must be a force against the resilience of the trip spring 20.

The resilience of the trip spring 20 is utilized during the opening action. In other words, the magnetic force of the permanent magnet 19 is offset by the magnetic field in the opposite direction when the coil 17 is excited and closed, and the shaft 8 is actuated by the resilience of the spring 20, and the fixed electrode 1 and the movable electrode 2 are opened. pole.

In the present embodiment, the movable electrode 2 is fixed by using the first breaker-side spherical bearing 32 and the second breaker-side spherical bearing 33 which are arranged in series as the bearing for supporting the movable conductor 4 of the movable electrode 2. The movable conductor 4 is slidably supported, and has a hole through which the movable conductor 4 is inserted at the center portion. The support surface of the movable conductor 4 of the hole is a flat surface, and the outer surface has a curved shape, and the movable conductor 4 follows the eccentricity. In the eccentric movement of the movable conductor 4, the movable conductor 4 continues to moderately restrict the inclination of the central axis; the first circuit breaker side spherical bearing 32 and the second circuit breaker side spherical bearing 33 are present between the movable conductor 4 and the movable conductor 4. When there is a small gap due to the dimensional tolerance, since the inner surface rotates along the surface of the movable conductor 4, the surface of the movable conductor 4 and the first circuit breaker side spherical bearing 32 and the second open circuit can be maintained normally. The surface contact of the sliding portion of the inner surface of the spherical-side spherical bearing 33 also has a certain degree of freedom and is inclined.

FIG. 4 is a conceptual view showing the operation of the first breaker side spherical bearing 32. The movable angle ±θ of the movable conductor 4 is such that the difference between the outer diameter of the movable conductor 4 and the inner diameter of the first breaker side spherical bearing 32 is d, and the first breaker side spherical bearing 32 and the second breaker side spherical surface The distance between the bearings 33 is L and is expressed by Math.

[Math 1] θ=tan ^-1 (d/L)

Therefore, the life of the first circuit breaker side spherical bearing 32 becomes longer than the conventional one, and even if the movable angle θ of the movable conductor 4 is set larger than the conventional one, the first circuit breaker side is not damaged. The life of the spherical bearing 32. In other words, the life of the first circuit breaker side spherical bearing 32 and the contact failure between the fixed electrode 1 and the movable electrode 2 can be prevented, and the above-described degrees of freedom can be achieved.

Further, the first breaker side spherical bearing 32 and the second breaker side spherical bearing 33 are arranged at an appropriate distance, by In the same manner as in the embodiment, the distance between the first circuit breaker side spherical bearing 32 and the second circuit breaker side spherical bearing 33 can be adjusted by using the adjuster 34, and the movable angle of the shaft of the movable conductor 4 can be appropriately adjusted.

Also in the present embodiment, the electromagnetic actuator 52 discloses an example in which two first actuator side spherical bearings 23 and second actuator side spherical bearings 24 are applied.

As described above, it is conventionally applied to a strict tolerance to the difference in size between the inner diameter of the actuator bearings 21, 22 of the electromagnetic actuator 52 and the outer diameter of the shaft 8, but as in the present embodiment, by using the first actuation The method of the second spherical side bearing 23 and the second actuator side spherical bearing 24 maintains the surface of the shaft 8 and the first actuator side spherical bearing 23 and the second, even if it has a larger dimensional tolerance than the conventional setting. The surface of the sliding portion of the inner surface of the actuator side spherical bearing 24 is in contact with each other, and the smooth reciprocating motion of the shaft 8 can be maintained for a longer period of time than is conventional.

The shaft 8 is attached to the movable iron core 18, and the shaft 8 is easily formed by changing the diameter of the movable iron core 18 before and after the attachment position of the movable iron core 18, and is provided with a step, and two are added. The first actuator side spherical bearing 23 and the second actuator side spherical bearing 24 may have different sizes. Near the first actuator side spherical bearing 23 of the trip spring 20, since the shaft is strongly punched at the time of opening, the diameter of the shaft 8 and the bearing size are smaller than the second actuator side spherical bearing on the other side. It is more advantageous to have a large 24 side.

Further, as shown in FIG. 5, the fixed iron core 27 of the first actuator side spherical bearing 23 and the fixed second actuator side spherical bearing 24 are fixed. In the case of the plate member 28, in order to facilitate the positioning of the bearing during assembly, the countersunk holes 29 and 30 are provided, and the first cover member 46 and the second cover member 47 are housed in the countersunk holes 29 and 30, interposed therebetween. The first cover member 46 and the second cover member 47 fix the first actuator side spherical bearing 23 and the second actuator side spherical bearing 24 to the fixed core 27 and the plate member 28.

The magnetic flux Φ generated between the movable iron core 18 and the fixed iron core 27 to which the first actuator side spherical bearing 23 is fixed is proportional to the product of the number of windings n of the coil 17 and the current I, and is expressed by Mathematical Formula 2. .

[Math 2] =nI/R

Here, R is a magnetic resistance, and the length L of the magnetic circuit, the sectional area S, and the magnetic permeability μ are expressed by Math.

[Math 3] R=L/μS

Therefore, in order to obtain a stronger magnetic flux from the same coil 17, it is necessary to lower the magnetic resistance R and to narrow the length L of the magnetic circuit. It is advantageous to increase the sectional area S.

In Fig. 5, the area S ₁ of the surface of the fixed iron core 27 opposed to the movable iron core 18 is preferably equal to the area S ₀ of the movable iron core 18 on the opposite surface, and the area of the fixed core 27 through which the magnetic flux passes S ₂ is also equal to the area S ₁ is at or above _{(S 2 ≧ S 1 = S} 0) is preferred. In order to secure the area S ₁ , the aperture of the fixed core 27 for passing through the shaft 8 penetrating the central portion It becomes a necessary aperture for setting the first actuator side spherical bearing 23 In the case of a small size, as shown in FIG. 5, it is necessary to provide the counter core hole 31 for accommodating the first actuator side spherical bearing 23 in the fixed iron core 27.

According to the configuration of the present embodiment, the movable conductor or the size of the shaft or the installation position of the bearing can maintain the smooth reciprocating motion of the movable conductor or the shaft for a long period of time even if a larger error than the conventional one is allowed. Further, it has an effect of being difficult to cause contact failure in the electrode portion.

[Example 2]

Fig. 6 shows a vacuum circuit breaker 50 of the second embodiment of the switch gear of the present invention. The present embodiment shown in the figure is an example in which two first breaker side spherical bearings 32 and a second breaker side spherical bearing 33 are fixed without using an adjuster.

In other words, in the first embodiment, the first circuit breaker side spherical bearing 32 is fixed to the bottom of the vacuum vessel 3 by bolts or the like via the first cover member 25, but the second circuit breaker side spherical surface is provided in the same manner as in the first embodiment. The bearing 33 is fixed to the frame 48 or the like other than the vacuum container 3 by bolts or the like via the second cover member 26.

Also in the configuration of the present embodiment as described above, the same effects as those of the first embodiment can be obtained.

[Example 3]

Figure 7 shows an embodiment of the switching device of the present invention. 3 vacuum circuit breaker 50. The present embodiment shown in the figure is an example of a case where one spherical bearing is provided on the side of the vacuum valve (circuit breaker) 51.

In other words, in the present embodiment, the spherical bearing on the side of the vacuum valve (circuit breaker) 51 supports the movable conductor 4 as the first circuit breaker side spherical bearing 32 that is fixed in the same manner as in the first and second embodiments. Further, in order to maintain the stability of the rotation direction of the shaft of the movable conductor 4, the roller pin 39 is attached to the link pin 13, and a guide for ensuring the linear motion of the roller 39 is provided around the roller 39. Leads 40 and 41. In terms of the material of the roller 39, for example, a rubber-like elastomer is used, and the guide members 40 and 41 are disposed adjacent thereto. Then, one of the guide members 40 is fixed, and the other guide member 41 becomes slidable in the linear motion direction of the movable conductor 4 as the roller 39 moves.

In the case of this embodiment, the first breaker side spherical bearing 32 operates as shown in Fig. 8 . The difference in size between the outer diameter of the movable conductor 4 and the inner diameter of the first circuit breaker side spherical bearing 32 is d, the distance between the bearing and the coupling portion is L, and the movable angle ±θ of the movable conductor 4 is expressed by Math.

[Math 4] θ=tan ^-1 (d/L)

Also in the configuration of the present embodiment as described above, the same effects as those of the above-described embodiment can be obtained.

[Example 4]

Fig. 9 shows a vacuum circuit breaker 50 of the fourth embodiment of the switch gear of the present invention. The present embodiment shown in the figure is an example in which one spherical bearing is provided on the side of the vacuum valve (circuit breaker) 51, but a linear motion for holding the movable conductor 4 is provided outside the movable conductor 4. Two guides 42 such as a roller.

Even in the configuration of the present embodiment as described above, the same effects as those of the above-described embodiment can be obtained.

[Example 5]

Fig. 10 shows a vacuum circuit breaker 50 of the fourth embodiment of the switch gear of the present invention.

In the present embodiment shown in the figure, on the side of the vacuum valve (circuit breaker) 51, the first cover member 37 and the second cover member 38 are formed into a flat surface with the fixing portion of the vacuum container 3, so that the first cover member is formed. The flat surfaces of the 37 and the second cover members 38 are integrated and integrated, and are fixed to the bottom of the vacuum container 3 by bolts.

On the other hand, regarding the electromagnetic actuator 52 side, the second cover member 36 of the second actuator side spherical bearing 24 at the upper portion thereof and the first cover member 35 of the first actuator side spherical bearing 23 at the lower portion thereof, The fixing portion of the plate member 28 and the fixed iron core 27 is formed into a flat surface, and is fixed to the plate member 28 and the fixed iron core 27 through the flat surfaces of the first and second cover members 35 and 36.

Even in the configuration of the present embodiment as described above, it is a matter of course that the same effects as those of the above-described embodiment can be obtained, and it is not necessary to provide a countersink hole or a regulator, and the effect of a structure which can be simplified can be obtained.

Further, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail for easy understanding of the present invention, and are not necessarily limited to having all of the configurations described. Further, a part of the configuration of one embodiment may be replaced with another configuration, and a configuration of another embodiment may be added to the configuration of another embodiment. Further, some of the configurations of the respective embodiments may be added, deleted, or replaced with other configurations.

1‧‧‧Fixed electrode

2‧‧‧ movable electrode

3‧‧‧Vacuum container

4‧‧‧ movable conductor

5‧‧‧ Bellows

7‧‧‧iron cover

8‧‧‧Axis

9‧‧‧2nd connecting shaft

10‧‧‧1st connecting shaft

11‧‧‧ pole

12, 13‧‧‧ Link pin

14, 15, 16‧‧‧ support shaft

17‧‧‧ coil

18‧‧‧ movable iron core

19‧‧‧ permanent magnet

20‧‧‧Bounce spring

23‧‧‧1st actuator side spherical bearing

24‧‧‧2nd actuator side spherical bearing

25‧‧‧1st cover

26‧‧‧2nd cover

27‧‧‧Fixed core

28‧‧‧ boards

32‧‧‧1st breaker side spherical bearing

33‧‧‧2nd breaker side spherical bearing

34‧‧‧ adjuster

43‧‧‧Fixed conductor

44‧‧‧iron cover

46‧‧‧1st cover

47‧‧‧2nd cover

50‧‧‧Vacuum circuit breaker

51‧‧‧Vacuum valve (circuit breaker)

52‧‧‧Electromagnetic actuator

53‧‧‧ linkage mechanism

Claims (18)

A circuit breaker comprising: a container; a fixed electrode fixed to the container via a fixed conductor and disposed in the container; and a movable electrode disposed opposite to the fixed electrode to be connected to the fixed electrode Interrupting or interrupting current flow, and being fixed to a distal end portion of the movable conductor; and a bearing that supports the movable conductor that fixes the movable electrode to be slidable and fixed to the container The bearing is a spherical bearing having a hole that is inserted into the movable conductor and supports the movable conductor at a central portion thereof. The support surface of the movable conductor of the hole is a flat surface, and the outer surface has a curved shape. When the conductor is eccentric, the movable conductor follows the eccentricity and moves. The spherical bearing is supported by the cover member having a substantially curved surface shape with respect to the outer surface of the spherical bearing, and is slidably supported by the cover member. Fixed to the aforementioned container. The circuit breaker according to claim 1, wherein the container is a vacuum container, one end of the vacuum container is fixed, and the other end is attached to the movable conductor to follow the movement of the movable conductor, and the vacuum is maintained in the vacuum container. Bellows. The circuit breaker according to claim 1, wherein the second spherical surface that is slidably supported by the movable conductor is disposed under the spherical bearing and has the same structure as the spherical bearing. Bearing. The circuit breaker according to claim 3, wherein the second spherical bearing is supported by the second cover member having a substantially curved surface shape with respect to the outer surface of the second spherical bearing, and is slidably supported by the foregoing The second cover member is fixed to the aforementioned container. The circuit breaker according to claim 4, wherein between the cover member supporting the spherical bearing and the second cover member supporting the second spherical bearing, a distance between the spherical bearing and the second spherical bearing is adjusted Regulator. The circuit breaker according to claim 5, wherein the cover member and the second cover member and the adjuster are integrally formed by a bolt and fixed to the container. The circuit breaker according to claim 4, wherein the cover member and the second cover member are formed in a flat surface with the fixing portion of the container, and the flat surface of the cover member and the second cover member are integrated into one body. And is fixed to the aforementioned container. The circuit breaker according to claim 3, wherein the second spherical bearing is supported by a second cover member having a substantially curved surface shape with respect to an outer surface of the second spherical bearing, and is slidably supported while the second cover member The frame is fixed to the outside of the aforementioned container. The circuit breaker according to claim 1, wherein a guide member for supporting the movable conductor outside the spherical bearing and the movable conductor is provided below the spherical bearing. The circuit breaker of claim 9, wherein The guiding member is formed by a fixed guiding member and a guiding member slidable in a linear movement direction of the movable conductor, and a rotatable roller is disposed on the pin connecting the movable conductor, and the roller is further provided. The sub-system is in close proximity to both of the aforementioned guides. The circuit breaker of claim 9, wherein the aforementioned guiding member is two rollers disposed in close proximity to the movable conductor. An actuator comprising: an electromagnet having: a movable iron core disposed opposite to the fixed iron core; and a coil that is separated from or in contact with the fixed iron core in response to an electromagnetic force, and is formed from the coil a permanent magnet of a magnetic field and simultaneously generating an electromagnetic force for maintaining a contact state between the movable iron core and the fixed iron core, and an iron made as a side leg covering the periphery of the coil while forming a path of a magnetic flux generated from the coil a cover member coupled to the movable iron core to transmit a driving force with an electromagnetic force generated from the electromagnet; and two bearings supporting the shaft at an upper and lower portions of the device; the two bearings Each of the spherical bearings has a hole that is inserted into the shaft at the center and supports the shaft. The support surface of the shaft is a flat surface, and the outer surface has a curved shape, and the shaft is eccentric. , follow the eccentricity of the axis and move. The actuator of claim 12, wherein, regarding the aforementioned shaft, the diameter of the lower side is thicker than the upper portion, and the inner diameter of the two spherical bearings supporting the upper surface is larger than the upper spherical surface. Bearing, the lower spherical bearing is larger. The actuator of claim 12 or 13, wherein each of the two spherical bearings is supported by a cover member having a slightly curved surface shape with respect to an outer surface of the spherical bearing, and the upper portion is simultaneously The spherical bearing is fixed to the plate constituting the electromagnet via the cover member, and the spherical bearing of the lower portion is fixed to the fixed core via the cover. The actuator according to claim 12, wherein an area of the surface of the fixed iron core facing the movable iron core is substantially equal to an area of the movable iron core opposing surface, and an area of the side surface portion of the movable iron core The area of the opposite surface of the fixed iron core is equal to or larger. The actuator of claim 14, wherein the spherical bearing fixing portion for fixing the spherical bearing of the upper spherical bearing and the fixed iron core for fixing the lower spherical bearing is provided with a countersunk hole in the countersunk hole Each of the aforementioned cover members is housed and the spherical bearing is fixed. The actuator of claim 14, wherein the cover member of the upper spherical bearing and the cover member of the lower spherical bearing are formed as a flat surface with the fixing portion of the plate member and the fixed iron core, interposed therebetween The flat surface of the cover member is fixed to the plate member and the fixed iron core. A switching device comprising: a circuit breaker according to any one of claims 1 to 11, an actuator according to any one of claims 12 to 17, and a link mechanism connecting the circuit breaker and the actuator; transmitting a driving force of the actuator to the circuit breaker via the link mechanism, and accessing the fixed electrode and the movable electrode of the circuit breaker Perform current access or block.