JP2002124163A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switchgear which is prevented from shortened life, energy loss and operation failure caused by axial deviation between a switch part 5 and an operating mechanism 9 and easy to assemble. SOLUTION: A switch part 5 equipped with a stationary electrode 1, a movable electrode 2 and a movable electrode rod 3 is fitted to an operating mechanism 9 equipped with an insulation rod 12, an operation rod 6, a driving mechanism 7 and a holding mechanism 8 by a pin, whereby a deviation between an axis of the switch part 5 and an axis of the operating mechanism 9 is accepted by this fitted joint part, and the switch part 5 and the operating mechanism 9 can be separately fabricated and then assembled. The switchgear can thus be assembled with ease and certainty.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device having an electrode which can be freely separated and brought into contact with and separated from each other to open and close a pair of electrodes.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show the construction of a conventional switchgear utilizing electromagnetic repulsion. In FIGS. 6 and 7, the switching device is a switch unit 5 for directly opening and closing an electric circuit.
And an operating mechanism 9 for applying a driving force to the switch unit 5 to open and close the switch unit 5.

The switch section 5 comprises a fixed electrode 1 fixed to a fixed plate 20, a movable electrode 2 disposed opposite to the fixed electrode 1, and a movable electrode rod 3 extending from the movable electrode 2. These electrodes 1 and 2 are housed in a vacuum valve 4 to improve the arc extinguishing property. In addition, fixed electrode 1
Is connected to the fixed-side terminal 10 and the movable electrode 2 to the movable-side terminal 11 to enable connection between the electric circuit and the switch unit 5.

An operating mechanism 9 is provided on the movable electrode bar 3,
An insulating rod 12 electrically insulated from the switch unit 5;
An operating rod 6 provided on the insulating rod 12 for transmitting a driving force, a driving mechanism 7 for generating a driving force on the operating rod 6, and an opening of the fixed electrode 1 and the movable electrode 2 provided on the operating rod 6 Alternatively, the holding mechanism 8 holds the closed state.

The drive mechanism 7 is arranged on a movable shaft 6a which is a part of the operating rod 6, a movable coil 13 fixed to the movable shaft 6a, and a switch portion 5 side (upper side of the paper) of the movable coil 13. An opening-fixing coil 14 fixed to an opening-coil fixing plate 16, and a closing-fixing fixed to a closing-coil fixing plate 17 which is disposed on the opposite side (lower side of the drawing) with the movable coil 13 interposed therebetween. And a coil 15. The movable coil 13 has the movable shaft 6a movably penetrating the opening coil fixing plate 16 and the closing coil fixing plate 17, so that the movable coil 13 can reciprocate between the opening fixed coil 14 and the closing fixed coil 15. It can be moved.

The holding mechanism 8 is composed of a spring fixing plate 19 and a contact pressure input opening spring 18 fixed to the spring fixing plate 19 and the operating rod 6. Contact pressure input release spring 1
Numeral 8 denotes a spring having a non-linear property in which the biasing direction changes according to the movement of the operating rod 6, and applies a load in the closing direction (upward in the drawing) in the closed state and in the opening direction (downward in the drawing) in the open state. It has been set.

Next, the opening operation will be described. In a closed state as shown in FIG. 6, when a pulse current flows from the driving power supply to the opening fixed coil 14 and the movable coil 13, a magnetic field is generated in each of the coils 14 and 13, and mutually opposing electromagnetic repulsive forces are generated. appear. The movable coil 13 is pushed down by the electromagnetic repulsion force, and the movable coil 13 is moved downward.
The movable shaft 6a, that is, the operation rod 6, and the movable electrode 2 interlocked with the operation rod 6 move downward with the movement of the switch, and the switch unit 5 is opened. At this time, the contact pressure input release spring 18
Changes from the bias in the closing direction (upward in the drawing) to the bias in the opening direction (downward in the drawing), and as shown in FIG.
Is kept open.

Next, the closing operation will be described. When a pulse current flows from the driving power supply to the closing fixed coil 15 and the movable coil 13 in the open state in FIG. 7, a magnetic field is generated in each of the coils 15 and 13, and mutually opposing electromagnetic repulsive forces are generated. . The movable coil 13 is pushed upward by the electromagnetic repulsion, and the movable coil 13 is moved upward.
With the movement of the operation rod 6, the movable electrode 2 linked to the operation rod 6 moves upward, and the movable electrode 2 comes into contact with the fixed electrode 1, whereby the switch section 5 is closed. At this time, the contact pressure input opening spring 18 changes from the bias in the opening direction (downward in the drawing) to the closing direction (upward in the drawing),
The open state of the switch section 5 is maintained as shown in FIG.

[0009]

As described above, in the conventional switchgear, since the operating rod 6, the insulating rod 12, and the movable electrode rod 3 are fixed and integrated, as the switch unit 5 is used, Between the side and the operation mechanism 9 side,
They may come into contact with surrounding structures. A frictional force is generated by this contact, and there is a problem that the frictional force reduces the efficiency and shortens the life due to wear of the parts.

Further, since the operating rod 6, the insulating rod 12, and the movable electrode rod 3 are a rigid assembly having an integral structure, other parts must be assembled so that they are aligned with their axes during assembly. In addition, there is a problem that a lot of labor is required for assembling since adjustment of each part can be performed only after assembly is completed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a switchgear which facilitates assembly of components, has a small energy loss and a long life.

[0012]

According to the present invention, means for solving the above-mentioned problems are as follows. (1) A switch unit having a fixed electrode, a movable electrode, and a movable electrode rod extending from the movable electrode, the movable electrode rod being driven in the direction of its axis and being opened and closed, and connected to the switch unit. An operating mechanism for opening and closing the switch unit, wherein the operating mechanism has an axis to be aligned with the axis of the movable electrode rod,
An operating rod connected to the movable electrode rod, a driving mechanism for driving the operating rod in the axial direction, and a holding mechanism provided on the operating rod for holding an open / closed state of the switch unit; The operation rod is provided at at least one position between each of the movable electrode rod, the driving mechanism, and the holding mechanism, such that the driving force can be transmitted between the movable electrode bar and the driving shaft while allowing the axes to be misaligned with each other. It is provided with a connection part.

(2) The operating mechanism includes an insulating rod provided on the operating rod to electrically insulate the driving mechanism from the switch unit, and the pivot joint unit includes the movable electrode rod, the insulating It is provided at at least one location between the rod, the drive mechanism, and the holding mechanism.

(3) The pivotally connected portion is provided between the movable electrode rod and the insulating rod.

(4) The pivotally connecting portion is provided between the insulating rod and the operating rod.

(5) The pivot connection portion is provided between the driving mechanism and the holding mechanism.

(6) The holding mechanism is provided between the switch section and the driving mechanism.

(7) The holding mechanism is provided between the insulating rod and the driving mechanism.

(8) The pivotally connecting portion is provided between the insulating rod and the driving mechanism.

(9) The pivotal connection is a connection by pin connection or bearing connection.

(10) The holding mechanism is a non-linear spring.

(11) The drive mechanism includes a movable shaft for transmitting a driving force to the switch unit, a movable coil fixed to the movable shaft, and a fixed coil provided to face the movable coil. It is a thing.

(12) A guide portion for guiding the operation rod is provided between the holding mechanism and the driving mechanism.

(13) The guide section is integral with the holding mechanism.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 and FIG. 2 are schematic configuration diagrams showing a switchgear according to the first embodiment. 1 and 2, the fixed electrode 1 fixed to the fixed plate 20 is configured to open or close when a movable electrode 2 facing the fixed electrode 1 comes into contact with or separates from the fixed electrode 1. A movable electrode rod 3 extends from the electrode 2. The fixed electrode 1, the movable electrode 2 and the movable electrode rod 3 constitute a switch section 5. Further, the electrodes 1 and 2 are connected to a vacuum valve
It is stored in. The fixed electrode 1 and the movable electrode 2 are provided with a fixed terminal 10 and a movable terminal 11, respectively, to enable connection between the electric circuit and the switch unit 5. The movable electrode rod 3 has a shaft core 3a, and the movable electrode rod 3 is driven in the direction of the axis 3a to open and close the switch unit 5.

As shown in FIG. 3, an insulating rod 12 electrically insulated from the switch section 5 is pivotally attached to the movable electrode rod 3 via the insulating rod 12 by directional pins 21 and 22 perpendicular to each other. The pivot connection portion 20 is a connection portion having a degree of freedom in two directions. That is, the movable electrode rod 3 and the operating rod 6 are pivotally attached to the insulating rod 12 by the pins 21 and 22, respectively, and the shaft cores 3a and 6a of each other.
The pivotal coupling portion 20 is configured to smoothly transmit the driving force in the substantially axial direction while allowing the misalignment.

A driving mechanism 7 for generating a driving force transmitted to the operating rod 6 includes a movable shaft 6a which is a driving mechanism part of the operating rod 6, and a movable coil 13 fixed to the movable shaft 6a.
A fixed coil 14 for opening fixed to the opening coil fixing plate 16 on the switch unit 5 side of the movable coil 13, and a closed electrode fixed to a closed coil fixing plate 17 on the opposite side with the movable coil 13 interposed therebetween. And a fixed coil 15. Movable shaft 6a
Is loosely penetrated through both fixed coil fixing plates 16 and 17 so that it can move up and down in the plane of the paper. The movable coil 13 is configured to be able to reciprocate between the opening fixed coil 14 and the closing fixed coil 15. Have been.

The operating rod 6 is also provided with a holding mechanism 8 for holding the open state or the closed state.
Is a contact pressure input release spring 18 (hereinafter referred to as a spring 1) which is a non-linear spring.
8) and a spring fixing plate 19 for fixing the spring 18. Since the spring 18 is fixed to the operating rod 6 and the spring fixing plate 19 penetrates the operating rod 6 loosely,
The operating rod 6 is capable of reciprocating movement, and also has a feature that the connection position with the spring 18 moves with the movement of the operating rod 6, the spring biasing force and the biasing direction change, and the spring action is reversed. The biasing direction of the spring 18 is set to be held in the opening direction (downward in the drawing) in the open state and in the closing direction (upward in the drawing) in the closed state. The operating mechanism 9 includes the insulating rod 12, the operating rod 6, the driving mechanism 7, and the holding mechanism 8.
Is configured.

Next, the opening operation of the switchgear according to the first embodiment will be described. In a closed state as shown in FIG. 1, when a pulse current flows from a driving power supply (not shown) to the fixed opening coil 14 and the movable coil 13, a magnetic field is generated in each of the coils 14 and 13, and Opposing electromagnetic repulsion is generated. The movable coil 13 is moved by the electromagnetic repulsion.
Is pushed downward on the sheet against the action of the spring 18,
With the movement of the movable coil 13, the operation rod 6 and the movable electrode 2 move downward, and the switch unit 5 is opened.
At this time, the operation of the spring 18 is reversed from the bias in the closing direction (upward in the drawing) to the bias in the opening direction (downward in the drawing), and the open state of the switch unit 5 is maintained as shown in FIG. You.

Next, in this open state, when a pulse current flows from the driving power supply (not shown) to the fixed closing coil 15 and the movable coil 13, each coil 15,
13, a magnetic field is generated, and mutually opposing electromagnetic repulsive forces are generated. The movable coil 13 is pushed upward by the electromagnetic repulsion, and the operation rod 6 and the movable electrode 2 move upward with the movement of the movable coil 13, and the movable electrode 2 comes into contact with the fixed electrode 1. The switch unit 5 is closed. At this time, the spring 18 changes from the bias in the opening direction (downward in the drawing) to the closing direction (upward in the drawing),
The closed state of the switch unit 5 is maintained as shown in FIG.

As described above, the switchgear according to the first embodiment performs the above-described configuration and operation, so that the shaft cores 3a and 6a of the switch unit 5 and the operation mechanism 9 may be slightly misaligned. Also, since the movable electrode rod 3 and the operation rod 6 are pivotally connected via the insulating rod 12 by the pivot connection part 20, the pivot connection is maintained while the respective axes of the switch part 5 and the operation mechanism 9 are maintained. The driving force in the axial direction generated by the driving mechanism 7 can be transmitted while being permitted by the section 20. Thereby, the switch unit 5 and the operation mechanism 9
For example, friction occurs due to contact with the fixed plates 16 and 17 caused by axial misalignment between the operating rods 6 due to the friction.
In addition, it is possible to prevent damage to the movable electrode rod 3, generation of residual stress in the operation rod 6 or the movable electrode rod 3, and reduction in efficiency due to energy loss of these frictional forces.

Further, since the movable electrode rod 3 and the operating rod 6 are pivotally connected via the pivot connecting part 20, the switch part 5 and the operating mechanism 9 can be assembled after being separately assembled. Therefore, since the parts can be assembled separately, it is easy to assemble, and the operation test can be performed separately for the switch unit 5 and the operation mechanism 9, thereby increasing the reliability of the operation test after the assembly is completed.

The insulating rod 12 and the movable electrode rod 3 and the operation rod 6 are pivotally connected to each other by pins 21 and 22, respectively. However, even if only one of the pins is used, the above-described effects can be obtained. . Further, the pivot joint 20 has the insulating rod 12, but when the pivot joint 20 is used at a place where electrical insulation is unnecessary, for example, the movable electrode rod 3 may be used without using the insulating rod 12. The operation rod 6 may be a pivotally connected portion directly connected to the pin.

Further, even if the operation rod 6 between the drive mechanism 7 and the holding mechanism 8 is provided with a pivotally connected portion by a pin, the assembling property and the adjustment are easy and reliable.

Embodiment 2 FIG. 4 is a schematic configuration diagram illustrating the switchgear according to the second embodiment. In FIG. 4, the holding mechanism 8 is provided between the insulating rod 12 and the driving mechanism 7, and a pivotally connecting portion 23 with a pin 31 is provided on the operating rod 6 between the holding mechanism 8 and the driving mechanism 7. Have been. Further, the movable electrode rod 3 is fixed to the insulating rod 12,
The insulating rod 12 is fixed to the operation rod 6. Further, a guide portion 24 for guiding the operation rod 6 is provided on the spring fixing plate 19 to prevent shaft deviation. The other configuration and the opening / closing operation are the same as those in the first embodiment.

As described above, the holding mechanism 8 is provided between the switch unit 5 and the driving mechanism 7, and is pivotally mounted between the holding mechanism 8 and the driving mechanism 7 so that only the driving mechanism 7 can be combined later. Since the coupling portion 23 is provided, the contact pressure of the electrode contact of the switch portion 5 can be adjusted in advance, energy loss due to excessive contact pressure can be reduced, and assembly becomes easy.

The guide portion 2 for guiding the operating rod 6
Since the holding mechanism 8 is provided on the holding mechanism 8, the shaft is prevented from shaking. Further, the guide portion 24 is provided substantially at the center of the driven shaft including the movable electrode rod 3, the insulating rod 12 and the operation rod 6.
Therefore, a stable opening / closing operation can be performed with one support.

Note that at least one of the insulating rod 12 and the movable electrode rod 3 or the operation rod 6 may be a pivotally connected part by a pin.

Further, as shown in FIG. 5, the above-described effect can be obtained even if the holding mechanism 8 is provided on the movable electrode bar 3, so that it does not matter.

As shown in FIG. 5, the same effect can be obtained even if the guide portion 24 is integrated with the spring fixing plate 19, and the number of parts can be reduced.

In each of the above embodiments, the same effect can be obtained even if the pivotally connected portion by the pin is a connected portion by the bearing connection.

In each of the above embodiments, the moving coil 1 is used.
A similar effect can be obtained by using a conductive plate in place of 3 and utilizing an electromagnetic repulsion caused by an eddy current generated in the conductive plate by electromagnetic induction.

[0043]

As is clear from the above description, the effects of the present invention are as follows. (1) A switch unit having a fixed electrode, a movable electrode, and a movable electrode rod extending from the movable electrode, the movable electrode rod being driven in the direction of its axis and being opened and closed, and connected to the switch unit. An operating mechanism for opening and closing the switch unit, wherein the operating mechanism has an axis to be aligned with the axis of the movable electrode rod,
An operating rod connected to the movable electrode rod, a driving mechanism for driving the operating rod in the axial direction, and a holding mechanism provided on the operating rod for holding an open / closed state of the switch unit; The operation rod is provided at at least one position between each of the movable electrode rod, the driving mechanism, and the holding mechanism, such that the driving force can be transmitted between the movable electrode bar and the driving shaft while allowing the axes to be misaligned with each other. The opening / closing device is provided with the attachment / coupling portion, so that the assembling is facilitated, and the opening / closing device that can prevent friction due to misalignment of the shaft center, damage to the operation rod and the movable electrode rod due to the friction, and energy loss due to the friction. Obtainable.

(2) The operating mechanism includes an insulating rod provided on the operating rod to electrically insulate the driving mechanism from the switch unit, and the pivot joint unit includes the movable electrode rod, the insulating Since it is provided at at least one of the positions between the rod, the drive mechanism, and the holding mechanism, assembly is facilitated, friction due to misalignment of the axis, and the operation rod and the movable electrode rod due to the friction. And a switchgear that can prevent energy loss due to the friction and the friction.

(3) Since the pivotally connected portion is provided between the movable electrode rod and the insulating rod, assembly becomes easy, and friction due to misalignment of the shaft center and the operation rod due to this friction are provided. Further, it is possible to obtain an opening and closing device capable of preventing damage to the movable electrode rod and energy loss due to the friction.

(4) Since the pivotally connecting portion is provided between the insulating rod and the operating rod, assembly is facilitated, and friction between the operating rod and the operating rod due to misalignment of the shaft center. It is possible to obtain an opening / closing device capable of preventing damage to the movable electrode rod and energy loss due to the friction.

(5) Since the pivotally connected portion is provided between the drive mechanism and the holding mechanism, assembly is facilitated, and friction between the operating rod and the operating rod due to misalignment of the shaft center. It is possible to obtain an opening / closing device capable of preventing damage to the movable electrode rod and energy loss due to the friction.

(6) Since the holding mechanism is provided between the switch and the drive mechanism, an opening / closing device that can be assembled after adjusting the contact pressure of the switch is obtained. Can be.

(7) Since the holding mechanism is provided between the insulating rod and the driving mechanism, an opening / closing device which can be assembled after adjusting the contact pressure of the switch section is obtained. Can be.

(8) Since the pivotally connected portion is provided between the insulating rod and the drive mechanism, assembly is facilitated, friction due to misalignment of the shaft center, and the operation rod and It is possible to obtain an opening / closing device capable of preventing damage to the movable electrode rod and energy loss due to the friction.

(9) Since the pivotal connection is a connection by pin connection or bearing connection, assembly is facilitated, friction due to misalignment of the shaft center, and the operation rod and the movable electrode rod due to this friction. A switchgear that can prevent damage and energy loss due to the friction can be obtained.

(10) Since the holding mechanism is a non-linear spring, the number of parts is reduced, and a highly reliable switchgear can be obtained.

(11) The drive mechanism includes a movable shaft for transmitting a driving force to the switch unit, a movable coil fixed to the movable shaft, and a fixed coil provided to face the movable coil. Therefore, it is possible to obtain an opening / closing device having a fast response speed and performing a stable opening / closing operation.

(12) Since the guide portion for guiding the operation rod is provided between the holding mechanism and the drive mechanism, it is possible to prevent the operation rod from shifting and perform a stable drive operation. A switchgear which can be obtained can be obtained.

(13) Since the guide portion is integrated with the holding mechanism, it is easy to determine the axis when assembling.
It is possible to obtain a switchgear that can reduce the number of parts and prevent energy loss and malfunction due to shaft runout.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a switchgear according to Embodiment 1 of the present invention in a closed state.

FIG. 2 is a schematic configuration diagram showing the switchgear according to Embodiment 1 of the present invention in an opened state.

FIG. 3 is an exploded perspective view showing a pivotally connected portion of the opening / closing device of the present invention.

FIG. 4 is a schematic configuration diagram showing a switchgear according to Embodiment 2 of the present invention.

FIG. 5 is a schematic configuration diagram showing a switchgear according to Embodiment 3 of the present invention.

FIG. 6 is a schematic diagram showing a conventional switching device in a closed state.

FIG. 7 is a schematic view showing a conventional switchgear in an open state.

[Explanation of symbols]

1 fixed electrode, 2 movable electrode, 3 movable electrode rod, 3a
Shaft core, 5 switch part, 6 operating rod, 6a shaft core,
Reference Signs List 7 drive mechanism, 8 holding mechanism, 9 operating mechanism, 12 insulating rod, 13 movable coil, 14 fixed coil for opening, 15 fixed coil for closing, 18 contact pressure input opening spring, 20, 23 pivotal joint, 24 Guide part.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Sasao 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Hiroyuki Akita 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Rishi Electric Co., Ltd. (72) Inventor Yukimori Kishida 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanbishi Electric Co., Ltd. (72) Inventor Mitsuru Month 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Inside Electric Co., Ltd. (72) Inventor Toshie Takeuchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. F-term (reference) 5G026 LB05 5G028 AA02 AA18 EB01 EB14

Claims (13)

[Claims] A switch having a fixed electrode, a movable electrode, and a movable electrode rod extending from the movable electrode, wherein the movable electrode rod is driven in the direction of its axis to be opened and closed; An operating mechanism connected to open and close the switch unit, wherein the operating mechanism has an axis to be aligned with the axis of the movable electrode rod, and the movable electrode rod An operating rod connected to the operating rod, a driving mechanism that drives the operating rod in the axial direction, and a holding mechanism that is provided on the operating rod and holds an open / closed state of the switch unit. At least one of the movable electrode rod, the drive mechanism and the holding mechanism, at least one place between each of the axes, a pivotal coupling portion that can transmit a driving force between the axes while permitting misalignment of the axes. Preparation Switchgear, characterized in that. 2. The operating mechanism includes an insulating rod provided on the operating rod to electrically insulate the driving mechanism from the switch unit, wherein the pivotally connected unit includes the movable electrode rod and the insulating rod. ,
The switchgear according to claim 1, wherein the switchgear is provided at at least one position between each of the driving mechanism and the holding mechanism. 3. The switchgear according to claim 1, wherein the pivotally connecting portion is provided between the movable electrode rod and the insulating rod. 4. The switchgear according to claim 1, wherein the pivotally connecting portion is provided between the insulating rod and the operation rod. 5. The opening / closing device according to claim 1, wherein the pivotally connecting portion is provided between the driving mechanism and the holding mechanism. 6. The opening and closing device according to claim 1, wherein the holding mechanism is provided between the switch unit and the driving mechanism. 7. The switchgear according to claim 1, wherein the holding mechanism is provided between the insulating rod and the driving mechanism. 8. The switchgear according to claim 1, wherein said pivotally connecting portion is provided between said insulating rod and said drive mechanism. 9. The switchgear according to claim 1, wherein the pivotal connection is a connection using a pin connection or a bearing connection. 10. The switchgear according to claim 1, wherein the holding mechanism is a non-linear spring. 11. The drive mechanism includes a movable shaft transmitting a driving force to the switch unit, a movable coil fixed to the movable shaft, and a fixed coil provided to face the movable coil. The switchgear according to any one of claims 1 to 10, wherein: 12. The opening and closing device according to claim 1, wherein a guide portion for guiding the operation rod is provided between the holding mechanism and the driving mechanism. 13. The opening / closing device according to claim 1, wherein the guide portion is integrated with the holding mechanism.