JPH0633632Y2 - Vacuum valve mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vacuum valve mounting structure.

[Prior Art] Generally, in a switch using a vacuum valve, as shown in FIG. 7, a vacuum is placed in a storage chamber 53 provided at the inner end of a hollow bushing 52 made of porcelain fixed to a case 51. A valve 54 is arranged, and a conductive rod 56 is inserted into an insertion hole 55 that communicates with the housing chamber 53 and extends over the entire outer end portion of the bushing 52. The conductive rod 56 is fixed to the outer peripheral edge portions of both ends of the insertion hole 55 of the bushing 52 with a nut 57 and a spring pin 58 via an interposing member 64, and is integrally formed with the valve 54 at the end portion on the case 51 side. The valve 54 is held in a fixed position by being screwed to the formed fixed electrode 59.

A movable electrode 60 is disposed inside the valve 54 so as to face the fixed electrode 59, and the movable electrode 60 is provided outside the valve 54 with respect to the inner wall of the storage chamber 53 by a holding plate 61 and a mounting plate 62.
It is led out of the bushing 52 through the inside of the cylindrical portion 63 fixed via the. The movable electrode 60 moves in the left-right direction on a predetermined reciprocating path, that is, inside the passage tube portion 63 by the rotation of a rotating body (not shown), and contacts and separates from the fixed electrode 59 in the valve 54 to open and close the electric path.

[Problems to be Solved by the Invention] However, since the bushing 52 is made of ceramics, its surface is not perfectly smooth. Therefore,
The nuts 57 and the like screwed on both ends of the conductive rod 56 are tightened and fixed to the outer peripheral edge of the insertion hole 55 in an indefinite posture. Based on the posture of the nut 57 and the like, the conductive rod 56 does not have the axial center line thereof coincident with the center line of the insertion hole 55, and the conductive chamber 56 is in an indefinite posture.
It projects into 53. The position of the vacuum valve 54 in the accommodation chamber 53 of the bushing 52 is changed by the deviation of the posture of the conductive rod 56, and the movable electrode 60 is moved along the passage set based on the predetermined position of the valve 53. Interfere with the exercise of. As a result, the movement of the movable electrode 60 lacks smoothness, which adversely affects the opening and closing of the electric path.

The present invention has been made to solve the above-mentioned problems, and the purpose thereof is to create a vacuum in which the movable electrode always performs a predetermined operation and ensures a good opening and closing of the electric path without being influenced by the posture of the conductive rod. It is to provide a mounting structure for a valve.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention has a bushing in which a conductive rod is inserted and fixed, and a fixed electrode of a vacuum valve is connected to an inner end of the conductive rod. In a mounting structure of a vacuum valve in which a movable electrode moving on a predetermined reciprocating path is brought into contact with and separated from a fixed electrode, a flexible conductive member is interposed between an inner end of the conductive rod and the fixed electrode, The gist of the present invention is that the flexible conductive member is deformed so that the fixed electrode is connected to and supported by the inner end of the conductive rod so that the fixed electrode is always positioned on the same axis as the movable electrode.

[Operation] By adopting the above-mentioned means in this invention, the eccentricity between the conductive rod and the fixed electrode is absorbed by the flexible conductive member in order to keep the fixed electrode and the movable electrode on the same axis in the valve. The movement of the movable electrode, which moves toward and away from the fixed electrode in the valve, can be smoothly performed.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to FIGS.

In FIG. 1, the case 1 is provided with a mounting hole 2 through which
A bushing 3 made of porcelain that is inserted from the inner end (right end) into the mounting hole 2 has a flange portion 4 on the outer periphery of substantially the center thereof.
It is fixed to the case 1 at. Bushing 3
An insertion port 6 for the conductive rod 5 is provided at the left end of the through hole 7, and a through hole 7 extending from the insertion port 6 to the right end side communicates with a storage chamber 8 formed in the right half portion of the bushing 3 through a projecting port 6a. ing. Outer peripheral edge portions at the left and right ends of the through hole 7 are formed flat, and these outer peripheral edge portions serve as locking walls 9 and 10.

Then, in the insertion opening 6 of the bushing 3, the conductive rod 5
A nut 12 is screwed into the left end portion of the left locking wall 9 through the spring washer 13, the pressing plate 14 and the packing 15.
It is fastened and fixed to. On the other hand, the protruding port 6a of the bushing 3
Inside, a nut 16 is also screwed into the right end portion of the conductive rod 5, and the nut 16 is fastened and fixed to the right locking wall 10 via a washer 17 and a packing 18. Therefore, the conductive rod 5 is fixed to the bushing 3 by the nuts 12 and 16.

Further, the right end of the conductive rod 5 is a conductive flexible member 20 as a flexible conductive member configured by assembling four conductive flexible metal plates 19a and 19b having a channel-shaped cross section in a box shape. It is connected to the fixed electrode 21 integrally formed with the vacuum valve 31 via. The conductive flexible member 20 will be described below with reference to FIGS.

A pair of left and right vertically elongated metal plates 19a are bent in a channel shape so that their central portions are separated from each other to form elastic portions 22a, and are bolted to each other at projecting pieces provided at both upper and lower end portions. The elastic portions 22b of the pair of inner and outer horizontal metal plates 19b arranged so as to intersect with the vertical metal plates 19a are overlapped with the elastic portions 22a of the vertical metal plate 19a, and further project from the left and right ends to the side. It is bolted on one side. The right end of the conductive rod 5 penetrates the horizontally elongated metal plate 19b arranged on the left side and is fixed to the vertically elongated metal plate 19a, and the left end of the fixed electrode 21 is fixed to the vertically elongated metal plate 19a arranged on the right side. There is. Then, between the conductive rod 5 and the fixed electrode 21, these metal plates 19a and 19b elastically deform so that the conductive flexible member 20 allows and absorbs the eccentricity of the two.

Further, a storage space 23 surrounded by elastic portions 22a and 22b is formed in the conductive flexible member 20. A support member 24 having a U-shaped side face is formed on the side surface of the outer lateral elongated metal plate 19b via a spring washer 29, and a spring washer 30 is also formed on the side surface of the inner elongated metal plate 19a facing the side member. Bearing members 25 are respectively provided so as to extend through the. In the storage space 23, the bearing member 25 enters into the recess 24a of the support member 24, and the two 24, 25 are rotatably connected by the shaft 26 loosely inserted in the pin holes 27, 28. The support member 24 and the bearing member 25
And the pin holes 27, 28 of the two members 24, 25 are formed so that their inner diameters are larger than the outer diameter of the shaft 26. This allows the bearing member
The reference numeral 25 is adapted to rotate with respect to the support member 24 in all directions by a predetermined angle.

As shown in FIG. 1, in the vacuum valve 31, on the same axis as the fixed electrode 21, a movable electrode 32 that is hermetically inserted from the left side of the valve 31 is arranged. The 32 contacts 21a, 32a face each other. In addition, at the end of the movable electrode 32 protruding from the valve 31, a current-carrying metal fitting 33 is attached to the nut.
It is fixed by tightening at 35. Then, the movable electrode 32 is biased in the opening direction (rightward in FIG. 1) by the opening spring 34 provided between the valve 31 and the energization fitting 33. When the conductor rod 5 is fixed to the bushing 3 in the best mode, that is, when the axis of the conductor rod 5 coincides with the center line of the through hole 7, the conductive rod 5, the fixed electrode 21, and the movable electrode 32 are arranged.
The three are provided so as to be located on the same axis.

A movable member 37 is connected to the right end of the movable electrode 32 via a connecting rod 36, and a long hole 38 extending in the axial direction is provided at the center in the longitudinal direction thereof. Then, a shaft extending orthogonally to the movable member 37 from a drive plate 41 having a channel-shaped cross section, which is provided above the insulating rotary body 40 arranged below the movable member 37.
42 passes through the long hole 38, and further the shaft 42 and the metal fitting 33
A push spring 43 is mounted between the inner surface and the inner surface. The diameter of the shaft 42 is set to be slightly smaller than the vertical width of the long hole 38,
When the rotating body 40 is rotated counterclockwise by the rotating insulator 44 connected to the rotating body 40, the shaft 42 is moved leftward in the elongated hole 38 and presses the current-carrying metal fitting 33 via the pressing spring 43. Then, the movable electrode 32 is moved leftward against the biasing force of the opening spring 34.
As a result, the contact 32a of the movable electrode 32 comes into contact with the contact 21a of the fixed electrode 21 in the valve 31, so that the conductive rod 5 and the current carrying fitting 3
The electric circuit between the terminals 11 and 45 respectively connected to 3 is closed.

In addition, the electric circuit is cut off in the reverse operation to the above.
With the clockwise rotation of 40, the shaft 42 moves and returns to the position determined by the bolt 39 screwed into the right end of the movable member 37 in the elongated hole 38. Then, the force of the pressing spring 43 applied to the energizing metal fitting 33 is released, and the movable electrode 32 is biased to the right by the opening spring 34 and the opening spring (not shown) provided in the mechanism portion. , Abuts on the bolt 39 and moves further rightward together with the rotary insulator 44. Therefore, in the valve 31, the contact 32a of the movable electrode 32 is replaced by the contact 21a of the fixed electrode 21.
The electric circuit is cut off at a distance from.

Now, in order to assemble the above-mentioned vacuum valve mounting mechanism, the conductive rod 5 is fixed to the bushing 3, the bushing 3 is further fixed to the case 1, and then the conductive rod 5 and the fixed electrode 21 of the valve 31 are conductively flexible. Attach via member 20. As described above, the conductive portion 5 is attached to the bushing 3 by fastening the nuts 12 and 16 to the locking walls 9 and 10 at both ends of the conductive rod 5. Since the surfaces of the locking walls 9 and 10 of the porcelain bushing 3 are not smooth and the postures of the nuts 12 and 16 fixed to the bushing 3 are indefinite, the axis of the conductive rod 5 is also the center of the through hole 7. Movable electrode 32 without matching lines
It will deviate from the axis of.

In the storage chamber 8, the fixed electrode 21 of the valve 31 is connected to the conductive rod 5 through the conductive flexible member 20 so that the left end is supported and the right end is provided with a movable electrode.
32 is airtightly inserted. And the nut described above
When the axes of the conductive rods 5 are misaligned due to the unfixed postures of 12 and 16, the elasticity of the metal plates 19a and 19b of the conductive flexible member 20 is set so that the fixed electrode 21 is held on the same axis as the movable electrode 32. The deformation allows eccentricity between the fixed electrode 21 and the conductive rod 5. Therefore, the movable electrode 32 and the fixed electrode 21 are always held on the same axis.

In addition, the axes of the fixed electrode 21 and the movable electrode 32 are automatically made to coincide with each other so that they are brought into contact with and separated from each other, so that it is not necessary to provide a component that constitutes a moving path of the movable electrode 32.
The structure is simple and the cost is reduced.

In addition, in the storage space 23 of the conductive flexible member 20, the support member 24 and the bearing member 25 fixed to the metal plates 19a and 19b are rotatably assembled, so that the conductive flexible member 20 has a flexible function. It is configured to give strength to this without impairing. Therefore, the conductive flexible member 20 has a long service life.

4 to 6 (a) and (b) show the conductive flexible member 20.
Another example of is shown. These are all vertical metal plates
Although the shape of the elongated metal plates 19a and the elongated metal plates 19b are changed to provide a more flexible function, only a pair of elongated metal plates 19a is shown in the drawing for convenience. That is, FIG. 4 shows a structure in which the elastic portion 22a of the metal plate 19a is projected obliquely, the flexibility is increased by the inclined portion 45, and FIG. 5 shows the elastic portion.
The concave portions 46 for promoting flexibility are formed at two upper and lower portions of the 22a.

Further, FIGS. 6 (a) and 6 (b) show the vertically elongated flexible metal plate 19a on the left side.
On the other hand, a horizontally long flexible metal plate 19b is attached in a cross shape to form a left metal plate 19c, and a right metal plate 19d having a shape corresponding to the left metal plate 19c is attached to four bolts. And the inside of the curved portion of the right metal plate 19d is used as a storage space.

[Effects] As described in detail above, according to the vacuum valve mounting structure of the present invention, the fixed electrode is the same as the movable electrode when the flexible conductive member is deformed without being affected by the posture of the conductive rod. Since the movable electrode is held on the axis, the movable electrode always performs a predetermined operation to ensure an excellent opening and closing of the electric path.

[Brief description of drawings]

FIG. 1 is a sectional view showing a mounting structure of a vacuum valve in the present invention, FIG. 2 is a perspective view showing a conductive flexible member for connecting a conductive rod and a fixed electrode, and FIG. 3 is a sectional view of FIG. Fourth
FIGS. 6 (a) and 6 (b) are a sectional view and a side view showing another example of the conductive flexible member, and FIG. 7 is a sectional view showing a conventional example. Bushing 3, conductive rod 5, conductive flexible member 20 as a flexible conductive member, fixed electrode 21, movable electrode 32, vacuum valve 31.

Claims (1)

[Scope of utility model registration request] 1. A bushing has a conductive rod inserted through and fixed to the bushing, and a fixed electrode of a vacuum valve is connected to the inner end of the conductive rod. A movable electrode that moves on a predetermined reciprocating path is connected to the fixed electrode. In the vacuum valve mounting structure that is separated, a flexible conductive member is interposed between the inner end of the conductive rod and the fixed electrode, and the flexible conductive member is deformed so that A vacuum valve mounting structure in which a fixed electrode is connected and supported so that it is always positioned on the same axis as the movable electrode with respect to the end.