CN116261766A - Manipulator - Google Patents

Abstract

In order to provide an operator, the present invention is characterized by comprising: a movable iron core for driving a driving shaft for operating a movable side electrode disposed opposite to and capable of being in electrical contact with a fixed side electrode; and a coil disposed around the movable core, wherein the drive shaft and the movable core integrally operate together with the opening and closing operation of the movable electrode with respect to the fixed electrode, wherein the actuator is configured such that the drive shaft is supported by a 1 st bearing on the movable electrode side, the movable core is supported by a 2 nd bearing on the opposite side of the movable electrode side, and the actuator includes a stopper plate capable of stopping axial movement of an end portion of the movable core on the opposite side of the movable electrode side, and wherein a space surrounded by the movable core, the 2 nd bearing, and the stopper plate is formed when the movable electrode and the fixed electrode are in an on (closed) state.

Description

manipulator

technical field

The present invention relates to an operator, in particular an operator adapted to operate the movable side of the opposing poles of a circuit breaker by means of an insulated operating rod as a drive shaft.

Background technique

A vacuum circuit breaker is an example of a circuit breaker in which a movable side of an electrode is operated by a manipulator, and Patent Document 1 is a prior art document of the vacuum circuit breaker.

This patent document 1 describes a vacuum circuit breaker, in order not to increase the weight of the vacuum circuit breaker, and to reduce the size of the vacuum circuit breaker due to the shock and vibration caused by the opening and closing operation of the vacuum circuit breaker. The deflection of the casing improves the reliability of the opening and closing operation. The vacuum circuit breaker includes: a vacuum valve that accommodates at least the fixed-side electrode and the movable-side electrode and is covered by a molded part; An operator for driving the movable side electrode by an insulating operating rod, the vacuum valve and the operator are arranged on a straight line, and include a molded part of the vacuum valve and the operator connecting both Fixed fixed parts.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2018-147643

Contents of the invention

The technical problem to be solved by the invention

The above-mentioned manipulator generally generally includes: a movable iron core integrally operated with an insulating operating rod; a fixed iron core arranged opposite to the movable iron core in the axial direction (sometimes there is no fixed iron core); Around the iron core and the fixed iron core, a coil wound on a bobbin forming a magnetic field for driving the movable iron core; and a cylindrical first yoke provided on the outer peripheral side of the coil and a The second yoke and the third yoke on both sides in the axial direction, and the insulating operation rod that moves integrally with the movable iron core are supported by bearings held by the second yoke and the third yoke.

However, in the case of the structure of the manipulator described above, there is the following technical problem: when the movable-side electrode and the fixed-side electrode are in the disconnected state, the end of the insulating operation rod on the side opposite to the movable-side electrode Since it protrudes from the third yoke in the axial direction, it is necessary to design in consideration of the amount of protrusion of the insulating operating rod, resulting in an increase in size of the device.

In addition, it usually includes a shock absorber (shock mitigation function) for relaxing the impact of the end of the insulating operating rod protruding from the third yoke in the axial direction against the container wall when the movable side electrode and the fixed side electrode are in the disconnected state. part).

However, there is a technical problem in installing the above-mentioned buffer as follows: because it is necessary to prepare the buffer separately, it requires a lot of procedures, and because the buffer needs to be installed, the number of parts will increase, which is an important factor for increasing the size of the device. reason.

The present invention has been made in view of the above-mentioned technical problems, and a first object is to provide a manipulator that does not increase the size of the device.

In addition, a second object of the present invention is to provide a manipulator that does not require an additional impact-absorbing functional component (shock absorber), reduces procedures, and reduces the number of components without increasing the size of the device.

Technical solutions for technical problems

In order to achieve the above-mentioned first object, the manipulator of the present invention includes: a movable iron core that drives a drive shaft for operating a movable core that is disposed opposite to the fixed-side electrode and that can be electrically contacted with the fixed-side electrode. a movable side electrode; and a coil disposed around the movable iron core, the driving shaft and the movable iron core integrally operate together with the opening and closing operation of the movable side electrode relative to the fixed side electrode , in the manipulator, the drive shaft is supported by a first bearing on the side of the movable side electrode, and the movable iron core is supported by a second bearing on the side opposite to the side of the movable side electrode. Bearing support, when the movable-side electrode and the fixed-side electrode are in a disconnected (separated) state, the end of the drive shaft on the side opposite to the movable-side electrode does not move from the manipulator The axial end protrudes (protrudes).

In addition, in order to achieve the above-mentioned second object, the manipulator of the present invention includes: a movable iron core for driving a drive shaft, wherein the drive shaft is arranged opposite to the fixed-side electrode and can be connected to the fixed-side electrode for operation. a movable side electrode in electrical contact with the electrodes; and a coil disposed around the movable iron core, and the opening and closing of the drive shaft and the movable iron core and the movable side electrode relative to the fixed side electrode In the manipulator, the drive shaft is supported by the first bearing on the side of the movable electrode, and the movable electrode is on the opposite side of the movable electrode. The iron core is supported by the second bearing, and the manipulator includes a stopper plate capable of stopping the axial movement of the end of the movable iron core on the side opposite to the movable-side electrode side. When the movable-side electrode and the fixed-side electrode are in a connected (closed) state, a space surrounded by the movable iron core, the second bearing, and the stopper plate is formed.

The effect of the invention

According to the present invention, the following technical effects can be obtained: no need to prepare an additional shock absorbing functional part (shock absorber) without increasing the size of the device, reducing procedures, and reducing the number of parts without increasing the size of the device .

Description of drawings

Fig. 1 is a diagram showing a cross-section of a part of a vacuum circuit breaker using an operator of the present invention.

Fig. 2 is a sectional view showing a conventional manipulator.

Fig. 3 is a cross-sectional view showing Embodiment 1 of the manipulator of the present invention.

FIG. 4 is a diagram comparing the axial lengths of a conventional manipulator and the manipulator of this embodiment.

FIG. 5( a ) shows Embodiment 2 of the manipulator of the present invention, and is a cross-sectional view in a state where fixing bolts cannot be seen.

Fig. 5(b) shows Embodiment 2 of the manipulator of the present invention, and is a cross-sectional view in which a fixing bolt can be seen.

Fig. 6 is a diagram showing the operating state of the manipulator according to the second embodiment of the manipulator of the present invention.

Fig. 7 is a cross-sectional view showing an example of a shock absorbing functional member (shock absorber) employed in Embodiment 2 of the manipulator of the present invention.

Fig. 8 is a cross-sectional view showing an example of a structure for controlling the air escape amount in the space of the shock absorbing functional member (shock absorber) employed in the second embodiment of the manipulator of the present invention.

Fig. 9 is a sectional view showing Embodiment 3 of the manipulator of the present invention.

10 is a cross-sectional view showing an example of a fixing method of a permeable filter in Embodiment 3 of the manipulator of the present invention.

Fig. 11 is a cross-sectional view showing another example of the manipulator of the present invention.

Fig. 12 is a cross-sectional view showing a modified example of the manipulator shown in Fig. 11 .

Detailed ways

Hereinafter, the manipulator of the present invention will be described based on the illustrated embodiments. In the respective drawings, the same reference numerals are used for the same components.

Before describing an example of the manipulator of the present invention, a vacuum circuit breaker using the manipulator of the present invention will be described with reference to FIG. 1 .

As shown in FIG. 1 , a vacuum circuit breaker 100A roughly includes: a vacuum valve 1 integrally molded from a solid insulating material such as epoxy resin (surrounded by a molded portion 1A); a fixed-side cable bushing conductor 15 The fixed-side cable bushing 2 molded around the periphery of the movable-side cable bushing 3; the movable-side cable bushing 3 molded around the outer periphery of the movable-side cable bushing conductor 16; and an operator for operating the movable-side electrode 13 described later. 4.

Usually, the vacuum valve 1 integrally formed by injection molding of a solid insulating material such as epoxy resin is called a molded vacuum valve. The molded surface is partially grounded and electrically insulated by a solid insulator such as epoxy, not specifically shown here.

The above-mentioned vacuum valve 1 includes: a fixed-side end plate 6 joined to one end of the cylindrical insulating member 5; a fixed-side conductor 7 airtightly penetrating through the fixed-side end plate 6; The movable side end plate 8; one end is joined to the movable side end plate 8, a curved bellows 9 that allows the driving of the movable part; With the movable side conductor 10, the internal pressure of the vacuum valve 1 is maintained at a vacuum of about 10 ^-2 Pa or less.

Inside the vacuum valve 1 are disposed: a floating potential metal 11 supported by a cylindrical insulator 5 , a fixed-side electrode 12 connected to the end of the fixed-side conductor 7 , and a metal electrode 12 connected to the end of the movable-side conductor 10 . Movable side electrode 13 .

The movable-side conductor 10 is connected to an insulating operating rod 14 connected to an operator 4 connected to a contact mechanism that applies a contact load to the pair of electrodes. The space around the insulating operating rod 14 is filled with an insulating gas 18 such as air or sulfur hexafluoride.

By driving the movable electrode 13 through the insulating operating rod 14 in conjunction with the driving of the manipulator 4 , the contact and separation between the fixed electrode 12 and the movable electrode 13 , that is, the open state and the closed state of the vacuum valve 1 can be switched. The vacuum valve 1 in FIG. 1 shows the disconnected (separated) state of the fixed-side electrode 12 and the movable-side electrode 13 .

The fixed-side cable sleeve 2 electrically connects the fixed-side cable sleeve conductor 15 to the fixed-side conductor 7 of the vacuum valve 1, and the movable-side cable sleeve 3 arranges the movable-side cable sleeve conductor 16 on the movable side of the vacuum valve 1. Together with the vacuum valve 1, it is formed by integral injection molding of a solid insulator such as epoxy resin. The movable side conductor 10 of the vacuum valve 1 and the movable side cable bushing conductor 16 are electrically connected via a contact 17 that can slide and conduct electricity. A power supply side cable and a load side cable (not shown) are respectively connected to the fixed side cable bushing 2 and the movable side cable bushing 3 to form an operable structure.

In the vacuum circuit breaker 100A shown in FIG. 1 , the vacuum valve 1 and the operator 4 are disposed on a substantially straight line, and have a molded part 1A around the vacuum valve 1 and the operator 4 integrally fixed thereto. Fixing part 19.

The fixing structure of the vacuum valve 1 and the manipulator 4 using the fixing member 19 is such that the vacuum valve 1 side of the fixing member 19 is fixed to the molding part 1A protrudingly provided on the vacuum valve 1 by bolts 21a and 21b as fastening parts. A plurality of molded bulges (molded integrally with the molded part 1A) 20a, 20b embedded with insert nuts (Insert nuts) on the outside of the side surface, the manipulator 4 side of the fixing member 19 is formed by Bolts 21c and 21d on the upper part are directly fixed to the casing of the manipulator 4 .

Next, the conventional operator 4A used in the vacuum circuit breaker 100A described above will be described with reference to FIG. 2 .

As shown in FIG. 2 , a conventional manipulator 4A roughly includes: a movable iron core 22 that can move integrally with a drive shaft 14 a connected to an insulating operating rod 14 ; Fixed iron core 25 (there is also a case where there is no fixed iron core 25, in which case the first bearing 27a described later does not touch the movable iron core 22); it is arranged between the movable iron core 22 and the fixed iron core Around 25, a coil 23 wound on a bobbin 24 for generating a magnetic field for driving the movable iron core 22; a cylindrical first yoke 26a arranged on the outer peripheral side of the coil 23; The disc-shaped second yoke 26b on the side of the movable side electrode 13 of 23; The disc-shaped stopper (aluminum, SUS, etc. non-magnetic material) 26c for stopping, and the drive shaft 14a that moves integrally with the movable iron core 22 are configured so that the movable-side electrode 13 side is held by press-fitting. The disk-shaped second yoke 26b and the first bearing (such as a sliding bearing) 27a for fixing the iron core 25 are slidably supported, and the side opposite to the movable-side electrode 13 side is held by the disk-shaped stopper by press fitting. The 2nd bearing (for example, sliding bearing) 27b of 26c slides and supports.

However, in the case of adopting the above-mentioned structure of the conventional manipulator 4A, there is a technical problem as follows: when the movable-side electrode 13 and the fixed-side electrode 12 are in the disconnected (separated) state, because the driving shaft 14a and the Since the end 14b on the opposite side of the movable electrode 13 protrudes (protrudes) from the stopper 26c in the axial direction, it is necessary to design in consideration of the protruding amount of the drive shaft 14a, leading to an increase in size of the device.

The manipulator of the present invention is completed in order to solve the above-mentioned technical problems, and its details will be described below.

Example 1

Fig. 3 shows Embodiment 1 of the manipulator of the present invention.

The manipulator 4B of this embodiment shown in FIG. 3 has substantially the same structure as the conventional manipulator 4A shown in FIG. The shaft 14a is configured such that the movable-side electrode 13 side is press-fitted and held by the disk-shaped second yoke 26b and the fixed iron core 25 (there is also a case where the fixed iron core 25 is not provided, and in this case The first bearing (for example, a sliding bearing) 27a is slidably supported so that the first bearing 27a does not touch the movable iron core 22), and the movable iron that integrally operates with the drive shaft 14a is on the opposite side of the movable side electrode 13 side. The core 22 is slidably supported by a second bearing (such as a sliding bearing) 27c pressed into and held on the resin bobbin 24, and when the movable side electrode 13 and the fixed side electrode 12 are in the disconnected (separated) state, the drive shaft The end 14b of 14a on the side opposite to the side of the movable-side electrode 13 does not protrude from the axial end of the manipulator 4B, that is, the axial end of the stopper 26c.

In the embodiment shown in FIG. 3 , the second bearing 27c is press-fitted and held on the bobbin 24, but it is also possible to configure the second bearing 27c as a flange bearing, and use the bobbin 24 and the stopper ( Aluminum, SUS and other non-magnetic materials) 26c sandwich the second bearing 27c to hold the second bearing 27c, or use the bobbin 24 as the second bearing 27c to support the movable iron core 22.

In this embodiment, when the movable-side electrode 13 and the fixed-side electrode 12 are in the disconnected (separated) state, the position and the second The positions of the axial ends of the bearings 27c are substantially the same.

As described above, the manipulator 4B of this embodiment also includes the movable iron core 22 that can move integrally with the drive shaft 14a similarly to the conventional manipulator 4A of FIG. 2 ; A coil 23 wound on a resin bobbin 24 for generating a magnetic field for moving the movable iron core 22; a cylindrical first yoke 26a provided on the outer peripheral side of the coil 23; The disc-shaped second yoke 26b on the side of the movable side electrode 13 of 23; The disc-shaped stopper 26c formed of a non-magnetic material such as aluminum or SUS, the first bearing 27a is press-fitted to hold the second yoke 26b and the fixed iron core 25 (the first bearing 27a is press-fitted What is necessary is just to hold by the 2nd yoke 26b, it does not necessarily need to press-fit and hold to the fixed iron core 25), and the 2nd bearing 27c is hold|maintained by the bobbin 24 by press-fitting.

In the manipulator 4B of this embodiment, when the movable-side electrode 13 and the fixed-side electrode 12 are in the disconnected (separated) state, the end portion 14b of the drive shaft 14a on the side opposite to the movable-side electrode 13 does not stop. The piece 26c protrudes in the axial direction.

At this time, the position of the end 14b of the drive shaft 14a on the side opposite to the side of the movable electrode 13, the position of the axial end of the second bearing 27c, and the position of the axial end of the coil 23 are located at the stop. The axial inner side of the movable member 26c.

In addition, in this embodiment, a notch 22a is provided on the inner diameter side of the movable iron core 22 where the end 14b of the drive shaft 14a opposite to the side of the movable side electrode 13 is located, and the nut 28 is positioned in the notch. 22a is fitted into the end portion 14b of the drive shaft 14a on the side opposite to the movable side electrode 13 side.

By fitting the nut 28 to the end 14b of the drive shaft 14a opposite to the movable electrode 13 side, the bottom of the nut 28 can be held by a part of the notch 22a, preventing the drive shaft 14a from coming off.

FIG. 4 shows a comparison of the axial lengths of the conventional manipulator 4A and the manipulator 4B of this embodiment.

(a) of FIG. 4 is 4 A of conventional manipulators, and (b) of FIG. 4 is the manipulator 4B of this Example.

As shown in FIG. 4( a ), in the conventional manipulator 4A, when the movable electrode 13 and the fixed electrode 12 are in the disconnected (separated) state, the side of the drive shaft 14 a opposite to the movable electrode 13 is The side end portion 14b protrudes (protrudes) in the axial direction from the stopper 26c.

In the manipulator 4B of the present embodiment, as shown in (b) of FIG. 4 , when the movable side electrode 13 and the fixed side electrode 12 are in an open circuit (separated) state, the side of the drive shaft 14 a connected to the movable side electrode 13 is The end portion 14b on the opposite side does not protrude from the stopper 26c in the axial direction.

Therefore, in the manipulator 4B of this embodiment, compared with the conventional manipulator 4A, the end 14b of the drive shaft 14a on the side opposite to the side of the movable-side electrode 13 does not protrude from the stopper 26c in the axial direction, so that The corresponding amount (indicated by reference symbol L) becomes small, and the size of the device (manipulator 4B and vacuum circuit breaker 100A including it) is not increased.

Example 2

Fig. 5(a) and Fig. 5(b) show Embodiment 2 of the manipulator of the present invention.

The manipulator 4C of this embodiment shown in FIG. 5(a) and FIG. 5(b) has substantially the same structure as that of Embodiment 1 shown in FIG. The driving shaft 14a that moves ground is configured such that the side of the movable side electrode 13 is press-fitted and held by a disc-shaped second yoke 26b and a fixed iron core 25 (there is also a case where the fixed iron core 25 is not provided). In this case, the first bearing (for example, a sliding bearing) 27a is slidably supported so that the first bearing 27a does not impact the movable iron core 22, and is integrated with the drive shaft 14a on the side opposite to the movable-side electrode 13 side. The movable iron core 22 that moves ground is slidably supported by the second bearing (for example, a sliding bearing) 27c that is press-fitted and held on the resin bobbin 24, and includes a connection between the movable iron core 22 and the movable side electrode 13. The stopper plate 30, which stops the axial movement of the end portion on the opposite side, is formed with the movable iron core 22, the second The space 33 surrounded by the bearing 27c and the stopper plate 30 .

Specifically, the manipulator 4C of this embodiment includes: a movable iron core 22 that moves integrally with the drive shaft 14a; is arranged around the movable iron core 22, and generates a magnetic field for moving the movable iron core 22 A coil 23 wound on a bobbin 24 made of resin; a cylindrical first yoke 26a provided on the outer peripheral side of the coil 23; The second yoke 26b and the third yoke 26d, the first bearing (such as a sliding bearing) 27a are press-fitted and held on the second yoke 26b and the fixed iron core 25 (there is also a case where the fixed iron core 25 is not provided, In this case, the first bearing 27a does not impact the movable iron core 22), and the second bearing (for example, a sliding bearing) 27c protrudes from the third yoke 26d in the axial direction and is pressed in to be held on the bobbin 24. The stopper plate 30 is fixed to the third yoke at the full turn 8 by the third fixing bolt 32c via the bearing holding member 29 formed of a non-magnetic material such as aluminum or SUS provided on the outer peripheral side of the second bearing 27c. 26d, when the movable side electrode 13 and the fixed side electrode 12 are in the connected (closed) state, the axial end of the movable iron core 22, the axial protrusion of the second bearing 27c and the stopper are formed. The space 33 surrounded by the moving plate 30 .

The manipulator 4C of the present embodiment is configured such that the first yoke 26a and the second yoke 26b are fixed at 8 places around the entire turn by the first fixing bolt 32a, and the first yoke 26a and the third yoke 26d are fixed by the second fixing bolt 32a. 32b is fixed at full turn 8.

In addition, in this embodiment, a notch 22a is provided on the inner diameter side of the movable iron core 22 where the end 14b of the drive shaft 14a opposite to the side of the movable side electrode 13 is located, and the nut 28 is positioned in the notch. 22a is fitted into the end portion 14b of the drive shaft 14a on the side opposite to the movable side electrode 13 side.

Fitting the nut 28 to the end 14b of the drive shaft 14a opposite to the movable side electrode 13 can hold the bottom of the nut 28 on a part of the notch 22a and prevent the drive shaft 14a from coming off.

FIG. 6 shows the operating state of the manipulator 4C of this embodiment. Figure 6(a) shows that the movable side electrode 13 and the fixed side electrode 12 are in the on (closed) state, and Figure 6(b) shows that the movable side electrode 13 and the fixed side electrode 12 are in an intermediate state (in the middle of the operation) 6(c) shows when the movable-side electrode 13 and the fixed-side electrode 12 are in the disconnected (separated) state.

As shown in FIG. 6, it can be seen that as the movable side electrode 13 and the fixed side electrode 12 transition from the on (closed) state of FIG. 6(a) to the intermediate state of FIG. In the cut state of (c), the volume of the space 33 surrounded by the axial end portion of the movable iron core 22 , the axially protruding portion of the second bearing 27c, and the stopper plate 30 changes.

The manipulator 4C of the present embodiment includes a shock-relieving functional part (buffer) which controls the movement by the axial end of the above-mentioned movable iron core 22 when the movable-side electrode 13 and the fixed-side electrode 12 are in the disconnected (separated) state. portion, the axially protruding portion of the second bearing 27c, and the escape amount of air in the space 33 surrounded by the stopper plate 30, so that the end of the movable iron core 22 on the side opposite to the side of the movable side electrode 13 impact on the stopper plate 30 when the axial movement of the portion 14b stops.

That is, the space 33 surrounded by the axial end portion of the movable iron core 22, the axially protruding portion of the second bearing 27c, and the stopper plate 30 is located inside because the gap between the movable iron core 22 and the second bearing 27c is small. A state in which air is difficult to escape (air does not escape rapidly but gradually). When the movable side electrode 13 and the fixed side electrode 12 are in the disconnected (separated) state, the movable iron core 22 is moved while reducing the space 33 (reducing the volume of the space 33), but due to the escape of the air in the space 33 Reaction force is generated due to fewer exit passages, and air escape holes in the space 33 are increased. By controlling the reaction force, it is possible to constitute a cushioning function part (shock absorber).

Thus, by controlling the amount of air escaped from the space 33 surrounded by the axial end portion of the movable iron core 22, the axially protruding portion of the second bearing 27c, and the stopper plate 30 as an air buffer (buffer function), The impact when the movable iron core 22 hits the stopper plate 30 when the movable-side electrode 13 and the fixed-side electrode 12 are disconnected (separated) can be alleviated. By alleviating this impact, the rebound of the movable iron core 22 disappears or becomes smaller, and the movement of the movable-side electrode 13 in the ON (closing) direction can be suppressed.

Hereinafter, the above-mentioned shock absorbing functional member (shock absorber) will be described.

FIG. 7 shows an example of a shock absorbing functional member (shock absorber) employed in the manipulator 4C of this embodiment.

The shock-absorbing function part (shock absorber) for relaxing the impact on the stopper plate 30 shown in FIG. The center and a plurality of holes 30a, 30b formed at symmetrical positions centering on the central axis of the stop plate 30 (in the example shown in FIG. The central axis of 30 is a plurality of holes 30a, 30b) in symmetrical positions, and the amount of air in the space 33 escaping from the holes 30a, 30b is controlled, so that the movement of the movable iron core 22 and the movable Impact on the stopper plate 30 when the end portion on the opposite side of the side electrode 13 moves in the axial direction.

As an example of the configuration to control the amount of escape of the air in the space 33 from the above-mentioned holes 30a, 30b, as shown in FIG. The bolt 34 is fitted into the screw thread of the hole 30a, and the amount of air escaped from the space 33 is controlled by gradually disengaging the bolt 34 with a through hole from the hole 30a formed in the stopper plate 30 .

In addition, when the holes 30a, 30b include a plurality of holes formed in the center of the stopper plate 30 and formed in a symmetrical shape centered on the center axis of the stopper plate 30, the bolt 34 with a through hole can pass through. Different hole sizes enable adjustment of the braking force of the shock absorbing function (shock absorber).

By adopting such a structure of this embodiment, the axial length of the manipulator 4C can be included without greatly changing the axial length of the conventional manipulator 4A shown in FIG. ), there is no need to prepare additional shock absorbing functional parts (shock absorbers), the procedures can be reduced, the number of parts can be reduced, and the product size can be reduced.

In addition, by adjusting the amount of air escaping from the space 33 surrounded by the axial end of the movable iron core 22, the axial protrusion of the second bearing 27c, and the stopper plate 30, it is possible to adjust the shock absorbing function (shock absorber). braking force.

Example 3

Fig. 9 shows Embodiment 3 of the manipulator of the present invention.

Manipulator 4D of this embodiment shown in FIG. A gas permeable filter 35 formed of a wet material or the like. The other structures are the same as those of the manipulator 4C of the second embodiment shown in FIG. 5( a ).

The air-permeable filter 35 mentioned above is pasted on the stop plate 30 with an adhesive, or as shown in FIG. and is fixed to the stopper plate 30 .

The air-permeable filter 35 used in the manipulator 4D of this embodiment is a sheet-like film, a bolt type (a type that is mounted with bolts), etc., regardless of its shape. By installing a filter, it is less likely to be affected by the external environment (since water and dust do not enter, the surrounding environment is less likely to affect the characteristics). In addition, if the bolt type is used, the air-permeable filter 35 can be easily attached and detached.

The structure of this embodiment has the same effect as that of the second embodiment.

Examples of other manipulators will be described using FIGS. 11 and 12 .

In the example of the manipulator shown in FIG. 11, a threaded hole 30a is formed in the center of the stopper plate 30 similarly to the manipulator 4C shown in FIG. In the (closed) state, the fixing bolt 37 is fitted into the hole 30 a to hold the end 14 b of the driving shaft 14 a on the side opposite to the side of the movable-side electrode 13 .

In the example shown in FIG. 11 , using the same threaded hole 30 a as that of the manipulator 4C shown in FIG. 8 , the movable iron core 22 can be pushed in with the fixing bolt 37 . In this case, in order to push the movable iron core 22 straight thereinto, the position of the hole 30 a formed with the thread should just be located on the central axis.

Since the movable iron core 22 can be pushed and fixed by the fixing bolt 37, the connected (closed) state of the movable side electrode 13 and the fixed side electrode 12 can be easily maintained. In addition, since the on (closed) state of the movable side electrode 13 and the fixed side electrode 12 can be maintained without a power source such as external electric power, it is possible to easily measure the contact spring management dimension at the time of inspection.

In the example shown in FIG. 12 , instead of the fixing bolt 37 shown in FIG. 11 , the joint 38 for air piping is fitted into the threaded hole 30 a, and the movable side electrode 13 and the fixed side electrode 12 are connected (closed). ) state, inject compressed air into the space 33 through the joint 38 for air piping, and hold the end 14 b of the movable iron core 22 on the side opposite to the movable side electrode 13 side.

If compressed air is used instead of the fixing bolts 37 via the air piping joint 38, the movable side electrode 13 and the fixed side electrode 12 can be kept closed even with compressed air, and the vacuum circuit breaker 100A can be switched on and off by the compressed air. stop action.

The present invention is not limited to the above-described embodiments but includes various modified examples. For example, the above-mentioned embodiments have been described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to having all the configurations described. In addition, a part of the structure of one example can be replaced with the structure of another example, and the structure of another example can also be added to the structure of one example. In addition, addition, deletion, and substitution of other structures can be performed on a part of the structures of the respective embodiments.

Explanation of reference signs

1...vacuum valve, 1A...molding part, 2...fixed side cable bushing, 3...movable side cable bushing, 4, 4A, 4B, 4C, 4D...manipulator, 5...cylindrical insulation, 6... Fixed side end plate, 7...fixed side conductor, 8...movable side end plate, 9...corrugated tube, 10...movable side conductor, 11...floating potential metal, 12...fixed side electrode, 13...movable side electrode, 14...Insulated operating rod, 14a...Drive shaft, 14b...End portion of the drive shaft on the side opposite to the electrode on the movable side, 15...Fixed side cable bushing conductor, 16...Mobile side cable bushing conductor, 17... Contact, 18...insulating gas, 19...fixed part, 20a, 20b...molded bulge, 21a, 21b, 21c, 21d...bolt, 22...movable iron core, 22a...notch, 23...coil, 24... Bobbin, 25...fixed core, 26a...1st yoke, 26b...2nd yoke, 26c...stopper, 26d...3rd yoke, 27a...1st bearing, 27b, 27c...2nd bearing , 28... Nut, 29... Bearing holding member, 30... Stopper plate, 30a, 30c... Holes formed in the center of the stopper plate, 30b... Holes formed symmetrically around the central axis of the stopper plate, 32a ...1st bolt, 32b...2nd bolt, 32c...3rd bolt, 33...space, 34...bolt with a through hole, 35...permeable filter, 36...clamping member, 36a...formed on the clamping member Hole, 37...fixing bolt, 38...joint for air piping, 100A...vacuum circuit breaker.

Claims (12)

1. An operator, characterized in that, comprising: a movable iron core for driving a drive shaft for operating a movable side electrode disposed opposite to and capable of electrical contact with the fixed side electrode; and a coil disposed around the movable iron core, The drive shaft and the movable iron core integrally operate together with the opening and closing operation of the movable-side electrode relative to the fixed-side electrode, In the manipulator, the drive shaft is supported by a first bearing on the movable side electrode side, and the movable iron core is supported by a second bearing on the side opposite to the movable side electrode side. support, When the movable-side electrode and the fixed-side electrode are in the disconnected (separated) state, the end of the drive shaft on the side opposite to the side of the movable-side electrode does not extend from the axial direction of the manipulator. Protruding ends. 2. The manipulator according to claim 1, characterized in that: The operators include: the movable iron core capable of integrally acting with the drive shaft; a coil wound on a bobbin arranged around the movable iron core to generate a magnetic field for moving the movable iron core; a cylindrical first yoke provided on the outer peripheral side of the coil; a disk-shaped second yoke provided on the movable side electrode side of the coil; and a disc-shaped stopper capable of stopping the axial movement of the movable iron core provided on the side of the coil opposite to the side of the movable-side electrode, The first bearing is at least press-fitted and held by the second yoke, and the second bearing is press-fitted and held by the bobbin, or the second bearing is a flange bearing and The reel frame and the stopper are clamped to hold the second bearing, or the reel frame is used as the second bearing to support the movable iron core, When the movable-side electrode and the fixed-side electrode are in the disconnected (separated) state, the end portion of the drive shaft on the side opposite to the side of the movable-side electrode does not move from the stopper in the axial direction. pieces stand out. 3. The manipulator according to claim 1 or 2, characterized in that: When the movable-side electrode and the fixed-side electrode are in the disconnected (separated) state, the position of the end of the drive shaft opposite to the side of the movable-side electrode and the position of the second bearing The positions of the axial ends are substantially the same. 4. The manipulator according to any one of claims 1 to 3, characterized in that: A notch is provided on the inner diameter side of the movable iron core where the end of the drive shaft opposite to the movable side electrode is located, and a nut is fitted into the notch so as to be located in the notch. An end portion of the drive shaft on the side opposite to the side of the movable side electrode. 5. An operator, characterized in that, comprising: a movable iron core for driving a drive shaft for operating a movable side electrode disposed opposite to and capable of electrical contact with the fixed side electrode; and a coil disposed around the movable iron core, The drive shaft and the movable iron core integrally operate together with the opening and closing operation of the movable-side electrode relative to the fixed-side electrode, In the manipulator, the drive shaft is supported by a first bearing on the movable side electrode side, and the movable iron core is supported by a second bearing on the side opposite to the movable side electrode side. supported, and the manipulator includes a stopper plate capable of stopping the axial movement of the end portion of the movable iron core on the side opposite to the movable side electrode side, When the movable-side electrode and the fixed-side electrode are in an on (closed) state, a space surrounded by the movable iron core, the second bearing, and the stopper plate is formed. 6. The manipulator according to claim 5, characterized in that: The operators include: the movable iron core capable of integrally acting with the drive shaft; a coil wound on a bobbin arranged around the movable iron core to generate a magnetic field for moving the movable iron core; and a cylindrical first yoke provided on the outer peripheral side of the coil, and disc-shaped second and third yokes provided on both axial sides of the coil, At least the first bearing is press-fitted and held by the second yoke, and the second bearing protrudes from the third yoke in the axial direction and is press-fitted and held by the bobbin , The stopper plate is fixed on the axially outer side of the third yoke via a bearing holding member provided on an outer peripheral side of the second bearing, When the movable side electrode and the fixed side electrode are in the on (closed) state, the axial end portion of the movable iron core, the axially protruding portion of the second bearing, and the stopper are formed. The space surrounded by the moving plate. 7. The manipulator according to claim 5 or 6, characterized in that: The manipulator has a shock-relaxing functional part that controls the amount of escape of air in the space when the movable-side electrode and the fixed-side electrode are in a disconnected (separated) state, so as to relax Impact on the stopper plate when axial movement of the end portion of the movable iron core opposite to the movable side electrode side stops. 8. The manipulator according to claim 7, characterized in that: The impact relieving function part for mitigating the impact on the stopper plate is composed of at least one hole formed in the stopper plate, and controls the escape amount of the air in the space from the hole, The impact on the stopper plate is alleviated when the axial movement of the end portion of the movable iron core opposite to the movable side electrode side is stopped. 9. The manipulator according to claim 8, characterized in that: The hole is formed at least at the center of the stop plate, or includes a plurality of holes formed at the center of the stop plate and at positions symmetrical about the central axis of the stop plate, And, a thread is formed in the hole, and a bolt with a through hole is fitted into the thread of the hole and the hole includes a center axis formed at the center of the stop plate and a center axis of the stop plate. In the case of a plurality of positions symmetrical to the center, the through-hole sizes of the bolts with through-holes are different. 10. The manipulator according to claim 7, characterized in that: The shock-absorbing functional part for relaxing the impact on the stopper plate is composed of a hole formed in the center of the stopper plate and a gas-permeable filter covering the hole. 11. The manipulator according to claim 10, characterized in that: The gas-permeable filter is attached to the stopper plate with an adhesive, or the gas-permeable filter is fixed to the stopper plate by being sandwiched between members having holes formed therethrough in the axial direction. 12. The manipulator according to any one of claims 5-11, characterized in that: A notch is provided on the inner diameter side of the movable iron core where the end of the drive shaft on the side opposite to the movable side electrode is located, and a nut is fitted into the notch so as to be located in the notch. The end of the drive shaft on the side opposite to the side of the movable side electrode.

Images