JP2588602B2 - Movable electrode drive structure of switch - Google Patents

Description

Description: Object of the Invention (Industrial application field) The present invention relates to a movable electrode driving structure of a switch having a simple structure.

(Prior Art) Conventionally, as shown in FIG.
On both sides of the main body case 52, bushings 53 and 54 on the power supply side and the load side, each containing a fixed electrode for three phases, are provided facing each other. A support member 55 having a movable electrode (both not shown) is mounted on the load-side fixed electrode incorporated in the load-side bushing 54, and the load-side fixed electrode and the power supply-side fixed electrode 53a are mounted by the movable electrode. And can be separated from each other.
Further, three swing levers 57 are fixed to the opening / closing drive shaft 56 in correspondence with the support members 55, and a linking projection 59 is provided on the inner surface of a forked swing arm 58 protruding from the swing lever 57. Is provided. Then, the support member 55 is driven via the linking projection 59 to perform the closing operation of the switch 51.

(Problems to be Solved by the Invention) However, in the movable electrode drive structure of the switch 51, a swing lever 57 is attached to the open / close drive shaft 56 for each phase, as shown in FIG. ing. Therefore, not only does the number of components increase, but also the distance between the support members 55 increases, which causes a problem that the switch 51 becomes large and the manufacturing cost increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a movable electrode driving structure for a switch, which can reduce the number of parts to reduce the size of the switch, and can reduce the manufacturing cost by using the same part as the swing lever. To provide.

(Means for Solving the Problems) In order to achieve the above object, in the movable electrode drive structure of the switch according to the present invention, a pair of swing levers having the same shape are formed on the open / close drive shaft by 180 ° opposite sides. The two movable electrode bodies at both ends are provided so as to correspond to the movable electrode bodies at both ends in the phase direction, and a bifurcated swing arm is provided for each swing lever. A central movable electrode body is linked between the opposed outer surfaces of the arm.

(Operation) In the movable electrode drive structure of the switch configured as described above, the movable electrode body is driven to be opened and closed by a pair of swing levers having the same shape.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
Description will be made with reference to the drawings.

As shown in FIG. 2, the main body case 2 of the gas switch 1 in which the arc-extinguishing gas is filled is formed in an octagonal box shape, and a pressure release hole 25 is provided in the center of one end face. A pressure-release lid F is attached to the pressure-release hole 25 with a bolt 5.

On each side wall of the main body case 2, bushings 3.4 on the power supply side and the load side are inserted and attached in a sealed manner for each phase. A fixed electrode 3a connected to a conductive member (not shown) in the bushing 3 is provided at an inner end of the bushing 3 on the power supply side.
Is protruding.

A fixed electrode 4a protrudes from the inner end of the bushing 4 on the load side similarly to the fixed electrode 3a on the power supply side, and a movable electrode body 4b is slidably disposed on the outer periphery thereof. The movable electrode body 4b is disposed so as to be able to contact and separate from the fixed electrode 3a on the power supply side. A cylindrical support member 6 made of an insulating synthetic resin is connected and arranged around the outer periphery of the movable electrode body 4b.
Is attached to one end of a bellows 7 made of synthetic rubber. The other end of the bellows 7 is attached to the inner end of the load-side bushing 4. An orifice cone 8 is attached to the tip of the support member 6.

When the support member 6 moves from the position indicated by the dashed line (in the closed state) to the position indicated by the solid line (in the open state) in FIG. Fixed electrode 3a of bushing 3
It blows to the side.

As shown in FIGS. 3 and 4, a bearing 9 is provided at the center lower portion of the inner surface of the main body case 2 at the end of the mechanism section case 26, and the bearing 9 is provided at the corresponding inner surface of the pressure release hole 25 of the main body case 2. A pair of mounting members 11 are fixed at positions corresponding to 9.

An opening / closing drive shaft having one end pivotally supported by the bearing 9
At the other end of 10, a mounting plate 12 is attached via a bearing member 10a. The drive shaft 10 is inserted between the two end surfaces of the main body case 2 by inserting one end of the drive shaft 10 into the bearing 9 and fixing the mounting plate 12 to the mounting member 11 with bolts 12a.

As shown in FIGS. 1 and 6, the drive shaft 10 has two insulating rocking levers 13 made of synthetic resin or the like corresponding to the support members 6 at both ends in the longitudinal direction, that is, in the phase direction. Provided at the tip of each swing lever 13 are arms 15a and 15b as swing arms protruding in a U-shape.

As shown in FIG. 5, the swing lever 13 has a 90
The notch mounting recess 13a is arranged corresponding to the drive shaft 10, and a bolt 14 inserted from one side of the base end portion is screwed to the drive shaft 10 so as to be rotatable integrally with the drive shaft 10. Be worn. Both swinging levers 13 are attached from the opposite side to the drive shaft 10 by 180 degrees, are symmetrical in the left-right direction with one arm portion 15b facing each other, and have the same distance as the distance between the arm portions 15a and 15b. Are arranged only apart from each other. A cylindrical linking projection 16a is provided on the inner surface of the distal end of each of the arms 15a and 15b of each swing lever 13. In addition, a similar linking projection 16b is provided on the outer surface of the distal end of each arm 15b facing each other in both swing levers 13.

The support member 6 of each phase is provided between the arm portions 15a and 15b of each swing lever 13 and the arm portion 1 on the opposite side of both swing levers 13.
The linking projections 16a and 16b are respectively engaged with the linking grooves 6a which are arranged between 5b and are recessed on both side surfaces of the support member 6. When the drive shaft 10 is turned open and turned, the arm
The support member 6 is driven to be opened and closed via the linking projections 16a and 16b of 15a and 15b.

An opening / closing lever 17 and an auxiliary lever 18 are integrally fixed to one end of the drive shaft 10 on the bearing 9 side, and both ends thereof extend in the same direction. A pin 19 is fixed between the tip of the opening and closing lever 17 and the auxiliary lever 18. On the other end of the drive shaft 10 protruding from the mounting plate 12, a fan-shaped locking lever 20 is fixed.
A pair of mounting pieces 21 are fixed to the outer surface of the mounting plate 12 with the drive shaft 10 interposed therebetween so as to be spaced apart from each other, and the mounting piece 21 is provided with a stopper 22 constituting an adjusting portion.

A plurality of spacers 23 and an elastic material 24 such as rubber, which constitute an adjusting portion together with the stopper 22, are externally inserted into the stopper 22, and the base end of the stopper 22 is inserted through the mounting piece 22, and By locking the split pin 22a through, the stopper 2
2 is attached to the mounting piece 21. When the stopper 22 is not attached to the mounting piece 21, the drive shaft 10
Can rotate freely, and when the stopper 22 is attached to the mounting piece 21, the locking lever 20 is locked to the stopper 22 to regulate the amount of rotation of the drive shaft 10. Further, by increasing or decreasing the number of spacers 23 externally inserted into the stopper 22, fine adjustment of the rotation amount of the drive shaft 10 is possible.

A spring support rod 32 having a guide groove 32b extending in a longitudinal direction from an end surface of the distal end portion is rotatably supported at a base end portion of the mechanism portion case 26 in the main body case 2. The opening / closing lever 17 and the auxiliary lever are provided in the guide groove 32b.
Pins 19 between 18 are slidably engaged.

The drive shaft 10 includes an auxiliary lever 18 and an open / close lever 17.
The opening and closing drive is performed manually and automatically by an opening / closing drive device (not shown) in the mechanism section case 26 via the spring support rod 32 and the like.

The operation of the movable electrode drive structure of the switch configured as described above will be described.

In this movable electrode driving structure, first, the driving shafts 10 correspond to the supporting members 6 at both ends of the three supporting members 6.
From the opposite side, a pair of swing levers 13 having the same shape are symmetrical, that is, both swing levers
The linking projections 16b provided on the thirteen arms 15b are attached to face each other. Then, the arm portions 15a, 15 of the swing lever 13
The engagement protrusions 16a and 16b provided on the b are engaged with the engagement groove 6a of the support member 6. Then, in response to the drive shaft 10 being rotated by the opening / closing drive device, the three support members 6 are linked to each other.
Driven via 16a, 16b.

Therefore, the support members 6 for the three phases are collectively and firmly supported and driven by the arm portions 15a and 15b of the pair of swing arms, and the switch 1 can be closed and opened. In other words, unlike the conventional one using three swing levers,
Since the central supporting member 6 is sandwiched by the arm portions 15b of the swing lever 13 that drives the supporting members 6 on both sides thereof,
The distance between the support members 6 can be reduced, and the switch can be made smaller than before by disposing the support members 6 close to each other.

Further, in the movable electrode drive structure of the present embodiment, the same shape as the swing lever 13 for driving the movable electrode body 4b in association with the drive shaft 10 is used. Therefore, it is not necessary to separately manufacture and use parts having different shapes as the swing lever 13, and the manufacturing cost can be reduced.

Note that the present invention is not limited to the above-described embodiment, and is implemented by using a pair of symmetrically provided swing levers,
The present invention may be arbitrarily changed without departing from the spirit of the present invention, such as by mounting the drive shaft 10 in the same direction.

Effect of the Invention As described in detail above, the present invention can reduce the number of parts and downsize the switch, and can reduce the manufacturing cost by using the same part as the swing lever. Thus, the invention is industrially excellent.

[Brief description of the drawings]

FIG. 1 is a side view showing a swing arm and an opening / closing drive shaft in a gas switch according to an embodiment of the present invention, FIG. 2 is a front sectional view of a main body case, and FIG. FIG. 4 is a side sectional view of the mechanism case, FIG. 5 is a front view of an opening / closing drive shaft connected to the opening / closing drive device, FIG. 6 is a partial sectional view of a swing arm and a support member, FIG. FIG. 1 is a front sectional view showing a main body case of a conventional gas switch, and FIG. 8 is a side view showing a swing arm and an opening / closing drive shaft. Switch 1, fixed electrode 3a, movable electrode body 4b, switching drive shaft 10,
Swing lever 13, arm portions 15a and 15b as swing arms,
Coupling projections 16a, 16b.

Claims (1)

(57) [Claims] 1. A movable electrode driving structure for a switch in which a movable electrode body is arranged so as to be able to contact and separate three phases from a fixed electrode, and the movable electrode body is linked to an opening / closing drive shaft arranged in a phase direction. A pair of rocking levers having the same shape as the open / close drive shaft
Attached so as to correspond to the movable electrode bodies at both ends in the phase direction from the 0 degree opposite side, and provided a bifurcated swing arm for each swing lever, and linked each of the movable electrode bodies at both ends between each swing arm. A movable electrode driving structure for a switch, wherein a central movable electrode body is linked between opposing outer surfaces of both swing arms.