CN116261766A

CN116261766A - Manipulator

Info

Publication number: CN116261766A
Application number: CN202180065875.8A
Authority: CN
Inventors: 田村幸三; 小林将人; 芝山慎一
Original assignee: Hitachi Industrial Equipment Systems Co Ltd
Current assignee: Hitachi Industrial Equipment Systems Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2023-06-13
Also published as: WO2022244092A1; JPWO2022244092A1; EP4343806A1; JP7422947B2

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, and more particularly, to an operator suitable for operating a movable side of opposite poles of a circuit breaker through an insulating lever as a drive shaft.

Background

As an example of a circuit breaker on the movable side of an electrode operated by an operator, there is a vacuum circuit breaker, and as a prior art document of the vacuum circuit breaker, there is patent document 1.

Patent document 1 describes a vacuum circuit breaker that reduces deflection of a housing of an operator and improves reliability of opening and closing operations by reducing stress caused by shock and vibration generated in accordance with opening and closing operations of the vacuum circuit breaker without increasing the weight and size of the vacuum circuit breaker, the vacuum circuit breaker comprising: a vacuum valve which accommodates at least the fixed side electrode and the movable side electrode and whose periphery is covered with the molded part; and an operator that drives the movable-side electrode through an insulating lever as a drive shaft, the vacuum valve and the operator being arranged on a straight line, and including a fixing member that fixes both across a molded part of the vacuum valve and the operator.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2018-147643

Disclosure of Invention

Technical problem to be solved by the invention

The manipulator generally includes: a movable iron core integrally operated with the insulating operation rod; a fixed iron core (sometimes without a fixed iron core) disposed opposite to the movable iron core in the axial direction; a coil which is disposed around the movable iron core and the fixed iron core and is wound around a bobbin to form a magnetic field for driving the movable iron core; and a cylindrical 1 st yoke provided on the outer peripheral side of the coil, and 2 nd and 3 rd yokes provided on both axial sides of the coil, wherein the insulating operation rod integrally operated with the movable iron core is supported by bearings held by the 2 nd and 3 rd yokes.

However, in the case of the above-described configuration of the manipulator, there are the following technical problems: when the movable electrode and the fixed electrode are in the off state, the end portion of the insulating operation rod on the opposite side to the movable electrode protrudes in the axial direction from the 3 rd yoke, and therefore, a design is required in consideration of the protruding amount of the insulating operation rod, resulting in an increase in the size of the device.

Further, a damper (impact-absorbing function) is generally included to absorb the impact of the end portion of the insulating operation rod protruding in the axial direction from the 3 rd yoke on the container wall when the movable electrode and the fixed electrode are in the off state.

However, the buffer described above is provided with the following technical problems: since a buffer is required to be prepared separately, it is necessary to take a lot of steps, and since a buffer is required to be provided, the number of components increases, which is an important factor for the enlargement of the apparatus.

The present invention has been made in view of the above-described problems, and an object 1 is to provide an operator that does not increase the size of the device.

Further, the 2 nd object of the present invention is to provide an operator which does not require the additional preparation of an impact-attenuating functional member (damper), can reduce the number of parts, and does not cause the device to be enlarged.

Technical scheme for solving technical problems

In order to achieve the above object 1, an manipulator according to the present invention comprises: a movable iron core for driving a drive shaft for operating a movable side electrode disposed opposite to and in electrical contact with a fixed side electrode; and a coil disposed around the movable core, wherein the drive shaft and the movable core are integrally operated together with the opening and closing operation of the movable electrode with respect to the fixed electrode, and wherein in the actuator, the drive shaft is supported by a 1 st bearing on the movable electrode side, and the movable core is supported by a 2 nd bearing on the opposite side of the movable electrode side, and wherein when the movable electrode and the fixed electrode are in an open (separated) state, an end portion of the drive shaft on the opposite side of the movable electrode side does not protrude (protrude) from an axial end portion of the actuator.

In order to achieve the object 2, the manipulator of the present invention includes: a movable iron core for driving a driving shaft for operating a movable side electrode disposed opposite to and capable of electrically contacting 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.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the following technical effects can be obtained: the device is not increased in size, and an impact alleviation function (buffer) is not required to be prepared separately, so that the procedure can be reduced, the number of parts can be reduced, and the device is not increased in size.

Drawings

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

Fig. 2 is a cross-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 axial lengths of a conventional manipulator and a manipulator of the present embodiment.

Fig. 5 (a) is a cross-sectional view showing an embodiment 2 of the manipulator of the present invention, in a state where the fixing bolt is not visible.

Fig. 5 (b) is a sectional view showing a state in which a fixing bolt can be seen in embodiment 2 of the manipulator of the present invention.

Fig. 6 is a diagram showing an operation state of the manipulator according to embodiment 2 of the manipulator of the present invention.

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

Fig. 8 is a cross-sectional view showing an example of a configuration for controlling the air escape amount in the space of the shock absorbing functional member (damper) employed in embodiment 2 of the manipulator of the present invention.

Fig. 9 is a cross-sectional view showing embodiment 3 of the manipulator of the present invention.

Fig. 10 is a cross-sectional view showing an example of the fastening method of the permeable filter in example 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 modification of the manipulator shown in fig. 11.

Detailed Description

The manipulator of the present invention will be described below based on the illustrated embodiment. In the drawings, the same reference numerals are used for the same constituent members.

Before explaining an embodiment of the operator of the present invention, a vacuum circuit breaker using the operator of the present invention will be described with reference to fig. 1.

As shown in fig. 1, the vacuum circuit breaker 100A includes: a vacuum valve 1 formed by integrally injection molding (mold) a solid insulator such as epoxy resin (the periphery of which is covered with a molded part 1A); a fixed-side cable sleeve 2 molded around the fixed-side cable sleeve conductor 15; a movable-side sleeve 3 molded around the outside of the movable-side sleeve conductor 16; and an operator 4 that operates a movable-side electrode 13 described later.

In general, the vacuum valve 1 integrally injection-molded from a solid insulator such as an epoxy resin is called a molded vacuum valve. The molded surface portion is grounded and is electrically insulated by a solid insulator such as epoxy resin, not shown here in particular.

The vacuum valve 1 includes: and (3) withA fixed-side end plate 6 joined to one end of the cylindrical insulator 5; a fixed-side conductor 7 penetrating the fixed-side end plate 6 in an airtight manner; a movable-side end plate 8 joined to the other end of the cylindrical insulator 5; a bellows 9 having a curved shape, one end of which is joined to the movable-side end plate 8 and which allows driving of the movable portion; and a movable side conductor 10 which penetrates the bellows 9 in an airtight manner, maintains the vacuum of the bellows 9, and is driven in the axial direction, the internal pressure of the vacuum valve 1 is maintained at about 10 ^-2 And a vacuum of Pa or less.

The vacuum valve 1 is internally provided with: a floating potential metal 11 supported by the cylindrical insulator 5, a fixed side electrode 12 connected to an end of the fixed side conductor 7, and a movable side electrode 13 connected to an end of the movable side conductor 10.

The movable-side conductor 10 is connected to an insulating operation lever 14, and the insulating operation lever 14 is connected to an actuator 4 connected to a contact mechanism for applying a contact load to the electrode pair. The space around the insulating operation rod 14 is filled with an insulating gas 18 such as air or sulfur hexafluoride.

By driving the movable electrode 13 via the insulating operation lever 14 in conjunction with the driving of the operator 4, the contact 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 of fig. 1 shows an open (separated) state of the fixed side electrode 12 and the movable side electrode 13.

The fixed-side cable sheath 2 electrically connects the fixed-side cable sheath conductor 15 and the fixed-side conductor 7 of the vacuum valve 1, the movable-side cable sheath 3 is configured such that the movable-side cable sheath conductor 16 is disposed on the movable side of the vacuum valve 1, and is integrally injection-molded with the vacuum valve 1 from a solid insulator such as an epoxy resin, the movable-side conductor 10 and the movable-side cable sheath conductor 16 of the vacuum valve 1 are electrically connected via a contact 17 capable of sliding conduction, and a power-side cable and a load-side cable, not shown, are connected to the fixed-side cable sheath 2 and the movable-side cable sheath 3, respectively, so that the vacuum valve 1 can be operated.

In the vacuum interrupter 100A shown in fig. 1, the vacuum valve 1 and the actuator 4 are arranged on a substantially straight line, and a fixing member 19 integrally fixing the vacuum valve 1 and the actuator 4 across a molding portion 1A around the vacuum valve 1 is provided.

The vacuum valve 1 and the actuator 4 using the fixing member 19 have a fixing structure in which the vacuum valve 1 side of the fixing member 19 is fixed to a plurality of molded bulge portions (integrally formed with the molded portion 1A) 20a, 20b in which Insert nuts (Insert nuts) are embedded, which are provided in a protruding manner outside the side surface of the molded portion 1A of the vacuum valve 1, by bolts 21A, 21b as fastening portions, and the actuator 4 side of the fixing member 19 is directly fixed to a housing of the actuator 4 by

bolts

21c, 21d as fastening portions.

Next, a conventional manipulator 4A used in the vacuum interrupter 100A will be described with reference to fig. 2.

As shown in fig. 2, the conventional manipulator 4A generally includes: a movable iron core 22 integrally operable with a drive shaft 14a connected to the insulating operation lever 14; a fixed iron core 25 disposed axially opposite to the movable iron core 22 (there are cases where the fixed iron core 25 is not provided, and in this case, a 1 st bearing 27a described later is made not to touch the movable iron core 22); a coil 23 disposed around the movable iron core 22 and the fixed iron core 25 and wound around a bobbin 24 for generating a magnetic field for driving the movable iron core 22; a cylindrical 1 st yoke 26a provided on the outer peripheral side of the coil 23; a disc-shaped 2 nd yoke 26b provided on the movable electrode 13 side of the coil 23; and a disk-shaped stopper (non-magnetic material such as aluminum or SUS) 26c provided on the opposite side of the coil 23 to the movable-side electrode 13 side for stopping the axial movement of the movable iron core 22, and the drive shaft 14a integrally operated with the movable iron core 22 is configured such that the movable-side electrode 13 side is slidably supported by a 2 nd yoke 26b press-fitted and held in a disk shape and a 1 st bearing (for example, a slide bearing) 27a of the fixed iron core 25, and the opposite side of the movable-side electrode 13 side is slidably supported by a 2 nd bearing (for example, a slide bearing) 27b press-fitted and held in the disk-shaped stopper 26 c.

However, in the case of adopting the above-described configuration of the conventional manipulator 4A, there are the following technical problems: when the movable electrode 13 and the fixed electrode 12 are in the open (separated) state, since the end 14b of the drive shaft 14a on the opposite side to the movable electrode 13 protrudes (projects) from the stopper 26c in the axial direction, a design taking into consideration the protruding amount of the drive shaft 14a is required, resulting in an increase in the size of the device.

The manipulator according to the present invention has been made to solve the above-described problems, and details thereof will be described below.

Example 1

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

The manipulator 4B of the present embodiment shown in fig. 3 has substantially the same configuration as the conventional manipulator 4A shown in fig. 2, but the present embodiment is characterized in that: the drive shaft 14a integrally operating with the movable iron core 22 is configured such that the movable side electrode 13 is held by the disk-shaped 2 nd yoke 26B and the fixed iron core 25 by press-fitting (in this case, the 1 st bearing 27a is not brought into contact with the 1 st bearing (for example, a slide bearing) 27a of the movable iron core 22), the movable iron core 22 integrally operating with the drive shaft 14a is slidably supported by the 2 nd bearing (for example, a slide bearing) 27c of the bobbin 24 held by press-fitting on the opposite side of the movable side electrode 13, and when the movable side electrode 13 and the fixed side electrode 12 are in a disconnected (separated) state, the end 14B of the drive shaft 14a on the opposite side of the movable side electrode 13 does not protrude from the axial end of the actuator 4B, that is, the axial end of the stopper 26 c.

In the embodiment shown in fig. 3, the 2 nd bearing 27c is press-fitted and held to the bobbin 24, but the 2 nd bearing 27c may be held by sandwiching the 2 nd bearing 27c between the bobbin 24 and a stopper (non-magnetic material such as aluminum or SUS) 26c, or by using the bobbin 24 as the 2 nd bearing 27c to support the movable core 22.

In the present embodiment, when the movable electrode 13 and the fixed electrode 12 are in the open (separated) state, the position of the end 14b of the drive shaft 14a on the opposite side to the movable electrode 13 side is substantially the same as the position of the axial end of the 2 nd bearing 27 c.

As described above, the manipulator 4B of the present embodiment also includes, like the conventional manipulator 4A of fig. 2: a movable iron core 22 integrally operable with the drive shaft 14 a; a coil 23 disposed around the movable iron core 22, for generating a magnetic field for operating the movable iron core 22, and wound around a resin bobbin 24; a cylindrical 1 st yoke 26a provided on the outer peripheral side of the coil 23; a disc-shaped 2 nd yoke 26b provided on the movable electrode 13 side of the coil 23; and a disk-shaped stopper 26c made of a nonmagnetic material such as aluminum or SUS provided on the opposite side of the coil 23 to the movable electrode 13 side to stop the axial movement of the movable iron core 22, wherein the 1 st bearing 27a is press-fitted and held by the 2 nd yoke 26b and the fixed iron core 25 (the 1 st bearing 27a is press-fitted and held by the 2 nd yoke 26b, and is not necessarily press-fitted and held by the fixed iron core 25), and the 2 nd bearing 27c is press-fitted and held by the bobbin 24.

The operator 4B of the present embodiment does not protrude in the axial direction from the stopper 26c at the end 14B of the drive shaft 14a on the opposite side to the movable-side electrode 13 side when the movable-side electrode 13 and the fixed-side electrode 12 are in the open (separated) state.

At this time, the position of the end 14b of the drive shaft 14a on the side opposite to the movable-side electrode 13 side, the position of the axial end of the 2 nd bearing 27c, and the position of the axial end of the coil 23 are located axially inward of the stopper 26 c.

In the present embodiment, a notch 22a is provided on the inner diameter side of the movable iron core 22 at the end 14b of the drive shaft 14a opposite to the movable electrode 13 side, and a nut 28 is fitted in the end 14b of the drive shaft 14a opposite to the movable electrode 13 side so as to be positioned in the notch 22 a.

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

Fig. 4 shows a comparison of axial lengths of the conventional manipulator 4A and the manipulator 4B of the present embodiment.

Fig. 4 (a) shows a conventional manipulator 4A, and fig. 4 (B) shows a manipulator 4B according to the present embodiment.

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

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

Therefore, the end 14B of the drive shaft 14A on the opposite side of the movable electrode 13 does not protrude from the stopper 26c in the axial direction, and the operator 4B of the present embodiment is smaller by an amount corresponding to the protruding end (denoted by reference numeral L) than the conventional operator 4A, and the device (the operator 4B and the vacuum interrupter 100A including the same) is not enlarged.

Example 2

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

The manipulator 4C of the present embodiment shown in fig. 5 (a) and 5 (b) is substantially the same in structure as embodiment 1 shown in fig. 3, but the present embodiment is characterized in that: the drive shaft 14a integrally operating with the movable iron core 22 is configured such that the movable side electrode 13 side is slidably supported by a 1 st bearing (for example, a slide bearing) 27a which is pressed into and held by a 2 nd yoke 26b having a disk shape and a fixed iron core 25 (in this case, the 1 st bearing 27a is not made to strike the movable iron core 22 in some cases) and such that the movable side electrode 22 is pressed into and held by a 2 nd bearing (for example, a slide bearing) 27c of a bobbin 24 made of resin, the movable iron core 22 integrally operating with the drive shaft 14a is slidably supported by the 2 nd bearing 27c of the movable iron core 22 which is pressed into and held by the movable side electrode 13 side, and such that a stopper plate 30 for stopping axial movement of an end portion of the movable iron core 22 opposite to the movable side electrode 13 side is provided, and such that a space 33 surrounded by the movable iron core 22, the 2 nd bearing 27c, and the stopper plate 30 is formed when the movable side electrode 13 and the fixed side electrode 12 are in an on (closed) state.

Specifically, the operator 4C of the present embodiment includes: a movable iron core 22 integrally operated with the drive shaft 14 a; a coil 23 disposed around the movable iron core 22, for generating a magnetic field for operating the movable iron core 22, and wound around a resin bobbin 24; and a cylindrical 1 st yoke 26a provided on the outer peripheral side of the coil 23, and a disc-shaped 2 nd yoke 26b and 3 rd yoke 26d provided on the outer peripheral side of the coil 23, wherein the 1 st bearing (for example, a slide bearing) 27a is pressed and held on the outer peripheral side of the 3 rd yoke 26d and the fixed core 25 (in this case, the 1 st bearing 27a is not made to strike the movable core 22 in some cases, the 2 nd bearing (for example, a slide bearing) 27c is partially projected from the 3 rd yoke 26d in the axial direction and is pressed and held on the bobbin 24, and the stopper plate 30 is fixed on the outer peripheral side of the 3 rd yoke 26d in the axial direction by the 3 rd fixing bolt 32c via a bearing holding member 29 made of a nonmagnetic material such as aluminum or SUS provided on the outer peripheral side of the 2 nd bearing 27c, and forms a stopper 33 surrounded by the axial end portion of the movable core 22, the axial projecting portion of the 2 nd bearing 27c and the plate 30 when the movable side electrode 13 and the fixed side electrode 12 are in the on (closed) state.

The operator 4C of the present embodiment is configured such that the 1 st yoke 26a and the 2 nd yoke 26b are fixed at the full turn 8 by the 1 st fixing bolt 32a, and the 1 st yoke 26a and the 3 rd yoke 26d are fixed at the full turn 8 by the 2 nd fixing bolt 32 b.

The nut 28 is fitted to the end 14b of the drive shaft 14a on the side opposite to the movable electrode 13, and the bottom of the nut 28 is held on the surface of a part of the notch 22a, thereby preventing the drive shaft 14a from being separated.

Fig. 6 shows an operation state of the manipulator 4C of the present embodiment. Fig. 6 (a) shows the state where the movable electrode 13 and the fixed electrode 12 are on (closed), fig. 6 (b) shows the state where the movable electrode 13 and the fixed electrode 12 are in the intermediate state (in the middle of operation), and fig. 6 (c) shows the state where the movable electrode 13 and the fixed electrode 12 are off (separated).

As shown in fig. 6, it is seen that as the movable electrode 13 and the fixed electrode 12 transition from the on (closed) state of fig. 6 (a) to the intermediate state of fig. 6 (b), the movable core 22 further transitions to the off state of fig. 6 (c), the volume of the space 33 surrounded by the axial end portion of the movable core 22, the axial protruding portion of the 2 nd bearing 27c, and the stopper plate 30 changes.

The manipulator 4C of the present embodiment includes an impact alleviation function (damper) for controlling the escape amount of air in the space 33 surrounded by the axial end portion of the movable iron core 22, the axial protruding portion of the 2 nd bearing 27C, and the stopper plate 30 described above when the movable electrode 13 and the fixed electrode 12 are in the open (separated) state, and alleviating the impact on the stopper plate 30 when stopping the axial movement of the end portion 14b of the movable iron core 22 on the side opposite to the movable electrode 13 side.

That is, the space 33 surrounded by the axial end portion of the movable iron core 22, the axial protruding portion of the 2 nd bearing 27c, and the stopper plate 30 is in a state where the air inside is difficult to escape (the air escapes not rapidly but gradually) because the clearance between the movable iron core 22 and the 2 nd bearing 27c is small. When the movable electrode 13 and the fixed electrode 12 are in the open (separated) state, the movable core 22 is moved while the space 33 is reduced (while the volume of the space 33 is reduced), but since the escape passage of air in the space 33 is small, a reaction force is generated, and the escape hole of air in the space 33 is increased, and the reaction force is controlled, so that the buffer relaxing function member (buffer) can be constituted.

By controlling the air escape amount of the space 33 surrounded by the axial end portion of the movable iron core 22, the axial protruding portion of the 2 nd bearing 27c, and the stopper plate 30 as an air damper (damper function), the impact when the movable iron core 22 impacts the stopper plate 30 when the movable electrode 13 and the fixed electrode 12 perform the breaking (separating) operation can be relaxed. By relaxing the impact, the rebound of the movable iron core 22 is eliminated or reduced, and the movement of the movable electrode 13 in the on (closing) direction can be suppressed.

The impact-attenuating functional member (damper) will be described below.

Fig. 7 shows an example of the shock absorbing function (damper) employed in the manipulator 4C of the present embodiment.

The shock absorbing function (damper) for absorbing the shock to the stopper plate 30 shown in fig. 7 is constituted by a hole 30a formed in the center of the disk-shaped stopper plate 30, or includes a plurality of

holes

30a and 30b formed in the center of the stopper plate 30 and at positions symmetrical about the center axis of the stopper plate 30 (in the example shown in fig. 7, includes a plurality of

holes

30a and 30b formed in the center of the stopper plate 30 and at positions symmetrical about the center axis of the stopper plate 30), and the amount of escape of the air in the control space 33 from the

holes

30a and 30b is reduced to absorb the shock to the stopper plate 30 when the end portion of the movable iron core 22 opposite to the movable electrode 13 moves in the axial direction.

As an example of the configuration of controlling the escape amount of air in the space 33 from the

holes

30a and 30b, as shown in fig. 8, a screw thread is formed in the hole 30a formed in the center of the stopper plate 30, a bolt 34 with a through hole is fitted into the screw thread of the hole 30a, and the fitting of the bolt 34 with a through hole and the hole 30a formed in the stopper plate 30 is gradually released, whereby the escape amount of air in the space 33 is controlled.

In addition, in the case where the

holes

30a and 30b include a plurality of holes formed in the center of the stopper plate 30 and at positions symmetrical about the center axis of the stopper plate 30, the through hole sizes of the through hole-equipped bolts 34 are made different, and the braking force of the impact-attenuating functional member (damper) can be adjusted.

By adopting the configuration of this embodiment, the axial length of the manipulator 4C can be made to include the impact-attenuating function (damper) without significantly changing from the axial length of the conventional manipulator 4A shown in fig. 2, and it is not necessary to prepare an additional impact-attenuating function (damper), so that the number of steps can be reduced, the number of parts can be reduced, and the product size can be reduced.

Further, by adjusting the air escape amount of the space 33 surrounded by the axial end portion of the movable iron core 22, the axial protruding portion of the 2 nd bearing 27c, and the stopper plate 30, the braking force of the impact-attenuating functional member (damper) can be adjusted.

Example 3

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

As the impact-absorbing function (damper) for absorbing the impact to the stopper plate 30, the manipulator 4D of the present embodiment shown in fig. 9 uses an air-permeable filter 35 made of a waterproof moisture-permeable material or the like, which covers the hole 30c formed in the center of the stopper plate 30. The other structure is the same as that of the operator 4C of embodiment 2 shown in fig. 5 (a).

The air-permeable filter 35 is adhered to the stopper plate 30 with an adhesive, or as shown in fig. 10, the air-permeable filter 35 is fixed to the stopper plate 30 with being sandwiched by a clamp member 36 having a hole 36a formed therethrough in the axial direction.

The breather filter 35 employed in the operator 4D of the present embodiment is a sheet-like film, a bolt type (a type of attachment with bolts), or the like, regardless of its shape. By providing the filter, the filter is not easily affected by the external environment (since water and dust do not enter, the surrounding environment is not easily affected by the characteristics). Further, if the bolt type is adopted, the attachment and detachment of the breather filter 35 are easy.

The effect of the structure of this embodiment is the same as that of embodiment 2.

Examples of other operators will be described with reference to fig. 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. 8, and when the movable electrode 13 and the fixed electrode 12 are in the on (closed) state, the fixing bolt 37 is fitted into the hole 30a, and holds the end 14b of the drive shaft 14a on the side opposite to the movable electrode 13 side.

In the example shown in fig. 11, the movable iron core 22 can be pushed therein with the fixing bolt 37 using the same screw-formed hole 30a as the operator 4C shown in fig. 8. In this case, the position of the hole 30a in which the screw is formed may be located on the central axis in order to push the movable iron core 22 straight thereinto.

Since the movable iron core 22 can be pushed thereinto with the fixing bolt 37 for fixing, the on (closed) state of the movable side electrode 13 and the fixed side electrode 12 can be simply maintained. Further, 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 power, the contact spring management size at the time of inspection can be easily measured.

In the example shown in fig. 12, instead of the fixing bolt 37 shown in fig. 11, the air pipe joint 38 is fitted in the screw-formed hole 30a, and when the movable electrode 13 and the fixed electrode 12 are in the closed state, compressed air is injected into the space 33 through the air pipe joint 38, and the end 14b of the movable iron core 22 on the opposite side to the movable electrode 13 side is held.

If compressed air is used instead of the fixing bolt 37 via the air pipe joint 38, the movable electrode 13 and the fixed electrode 12 can be kept closed even by the compressed air, and the vacuum interrupter 100A can be turned on and off by turning on and off the compressed air.

The present invention is not limited to the above-described embodiments but includes various modifications. For example, the above-described embodiments are described in detail for the purpose of easily understanding the present invention, and are not limited to the configuration in which all the components described are necessarily present. In addition, a part of the structure of one embodiment can be replaced with the structure of another embodiment, and the structure of another embodiment can be added to the structure of one embodiment. In addition, deletion, and substitution of other structures can be performed for part of the structures of the embodiments.

Details of reference numerals

A vacuum valve, a 1A molding part, a 2 fixed side cable sheath, a 3 movable side cable sheath, 4A, 4B, 4C, 4D operators, 5 cylinder insulators, 6 fixed side end plates, 7 fixed side conductors, 8 movable side end plates, 9 bellows, 10 movable side conductors, 11 floating potential metals, 12 fixed side electrodes, 13 movable side electrodes, 14 insulating operation levers, 14A driving shafts, 14B driving shafts, ends on the opposite side of the movable side electrodes, 15 fixed side cable sheath conductors, 16 movable side cable sheath conductors, 17 contacts, 18 insulating gases, 19 fixing members, 20A, 20B molding bulging parts, 21A, 21B, 21C, 21D bolts, 22 movable iron core, 22a notch, 23 coil, 24 bobbin, 25 fixed iron core, 26a 1 st yoke, 26B 2 nd yoke, 26C stopper, 26D 3 rd yoke, 27a 1 st bearing, 27B, 27C 2 nd bearing, 28 nut, 29 bearing holding member, 30 stopper plate, hole formed in the center of stopper plate, hole formed symmetrically about the center axis of stopper plate, 30B, 32a 1 st bolt, 32B 2 nd bolt, 32C 3 rd bolt, 33 space, 34 bolt with through hole, 35 air permeability filter, 36 holding member, hole formed in holding member of 36a, 37 fixing bolt, 38 air piping joint, 100A vacuum circuit breaker.

Claims

1. An operator, comprising:

a movable iron core for driving a driving shaft for operating a movable side electrode disposed opposite to and capable of electrically contacting a fixed side electrode; and

a coil disposed around the movable core,

the drive shaft and the movable iron core integrally operate together with the opening and closing operation of the movable side electrode with respect to the fixed side electrode,

in the manipulator, the drive shaft is supported by a 1 st bearing on the movable side electrode side, the movable iron core is supported by a 2 nd bearing on the opposite side of the movable side electrode side,

when the movable electrode and the fixed electrode are in an open (separated) state, an end portion of the drive shaft on the opposite side to the movable electrode side does not protrude from an axial end portion of the operator.

2. The operator according to claim 1 wherein:

the manipulator includes:

the movable iron core capable of integrally operating with the drive shaft;

a coil which is arranged around the movable iron core, generates a magnetic field for operating the movable iron core, and is wound on a bobbin;

a cylindrical 1 st yoke provided on the outer peripheral side of the coil;

a disk-shaped 2 nd yoke provided on the movable electrode side of the coil; and

a disk-shaped stopper provided on a side of the coil opposite to the movable-side electrode side and capable of stopping the axial movement of the movable iron core,

the 1 st bearing is press-fitted at least to be held by the 2 nd yoke, and the 2 nd bearing is press-fitted to be held by the bobbin, or the 2 nd bearing is a flange bearing to hold the 2 nd bearing by sandwiching the bobbin and the stopper, or the bobbin is used as the 2 nd bearing to support the movable core,

when the movable side electrode and the fixed side electrode are in an open (separated) state, an end portion of the drive shaft on the opposite side to the movable side electrode side does not protrude from the stopper in the axial direction.

3. The operator according to claim 1 or 2, characterized in that:

when the movable electrode and the fixed electrode are in the open (separated) state, the position of the end of the drive shaft on the opposite side from the movable electrode side is substantially the same as the position of the axial end of the 2 nd bearing.

4. A manipulator according to any one of claims 1 to 3, wherein:

a notch is provided on the inner diameter side of the movable iron core at the end of the drive shaft opposite to the movable electrode side, and a nut is fitted to the end of the drive shaft opposite to the movable electrode side so as to be positioned in the notch.

5. An operator, comprising:

a coil disposed around the movable core,

in the manipulator, the drive shaft is supported by a 1 st bearing on the movable-side electrode side, the movable iron core is supported by a 2 nd bearing on the opposite side of the movable-side electrode side, and the manipulator includes a stopper plate capable of stopping axial movement of an end portion of the movable iron core on the opposite side of 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 core, the 2 nd bearing, and the stopper plate is formed.

6. The operator according to claim 5 wherein:

the manipulator includes:

the movable iron core capable of integrally operating with the drive shaft;

a coil which is arranged around the movable iron core, generates a magnetic field for operating the movable iron core, and is wound on a bobbin; and

a cylindrical 1 st yoke provided on the outer peripheral side of the coil, and a disk-shaped 2 nd yoke and 3 rd yoke provided on both sides in the axial direction of the coil,

the 1 st bearing is press-fitted to be held at least by the 2 nd yoke, and the 2 nd bearing protrudes from the 3 rd yoke portion in the axial direction and is press-fitted to be held at the bobbin,

the stopper plate is fixed to an axially outer side of the 3 rd yoke via a bearing holding member provided on an outer peripheral side of the 2 nd bearing,

when the movable side electrode and the fixed side electrode are in an on (closed) state, the space surrounded by the axial end portion of the movable core, the axial protruding portion of the 2 nd bearing, and the stopper plate is formed.

7. The operator according to claim 5 or 6 wherein:

the manipulator has an impact-alleviation function means for controlling the escape amount of air in the space when the movable-side electrode and the fixed-side electrode are in an open-circuit (separated) state, so as to alleviate an impact on the stopper plate when stopping axial movement of an end portion of the movable iron core on the side opposite to the movable-side electrode side.

8. The operator according to claim 7 wherein:

the shock absorbing function member for absorbing shock to the stopper plate is formed of at least 1 hole formed in the stopper plate, and is configured to absorb shock to the stopper plate when stopping axial movement of an end portion of the movable iron core opposite to the movable electrode side by controlling an escape amount of air in the space from the hole.

9. The operator according to claim 8 wherein:

the hole is formed at least at the center of the stopper plate, or includes a plurality of holes formed at the center of the stopper plate and at positions symmetrical about the center axis of the stopper plate,

further, a thread is formed in the hole, and when the through-hole-equipped bolt is fitted into the thread of the hole and the hole includes a plurality of holes formed at the center of the stopper plate and at positions symmetrical about the center axis of the stopper plate, the through-hole sizes of the through-hole-equipped bolts are different.

10. The operator according to claim 7 wherein:

the shock absorbing function member for absorbing shock to the stopper plate is constituted by a hole formed in the center of the stopper plate and a gas permeable filter covering the hole.

11. The operator according to claim 10 wherein:

the air-permeable filter is adhered to the stopper plate with an adhesive, or the air-permeable filter is fixed to the stopper plate with a member having a hole formed therethrough in the axial direction interposed therebetween.

12. The operator according to any one of claims 5 to 11 wherein:

a notch is provided on an inner diameter side of the movable iron core at an end portion of the drive shaft opposite to the movable electrode side, and a nut is fitted to an end portion of the drive shaft opposite to the movable electrode side so as to be positioned in the notch.