JPH0512893Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an operation mechanism for collectively operating three-phase switches.

``Prior Art'' Generally, an operating mechanism that operates three-phase switches all at once is constructed by disposing three levers on an operating shaft that rotates back and forth by a drive source, and connecting these levers to the switches. The reciprocating rotation of the operating shaft is converted into linear motion to open and close the switch.

In this case, when the three-phase switches are arranged in a straight line, by arranging the operating shaft parallel to the three-phase switches, the positional relationship between the three-phase switches and the three levers can be adjusted. Since they are the same, three-phase switches can be operated all at once.

However, in gas-insulated switchgear, the three-phase switches are often housed together in a cylindrical container, and in this case, in order to effectively utilize the space inside the container, the three-phase switches are housed in a triangular shape. Often arranged in shapes. In this case, the positional relationship between the lever and the switch cannot be made the same for all three phases, so in order to open and close all three phases at the same time and at the same speed, this switch must be Not only does it require a complicated link mechanism to connect the lever and the lever, but it also requires high-precision parts.

``Problem to be solved by the invention'' Using a complicated link mechanism as described above not only hinders the effective use of space inside the container, but also increases the number of parts and uses high-precision parts, resulting in lower costs. It is also expensive.

"Means for Solving the Problems" In view of the drawbacks of the above-mentioned prior art, the present invention aims to provide a switch operation mechanism that is simple in structure and small in size. In a device that opens and closes three phase switches 3A, 3B, and 3C at once by reciprocating rotation of levers 6A, 6B, and 6C disposed on an operating shaft 4, the three-phase switches 3
Parallel to the two-phase switches 3A, 3C among A, 3B, and 3C, and the same distance from the other one-phase switch 3B to the three-phase switches 6A, 6B, and 6C, respectively. While the operating shaft 4 is arranged as shown in FIG.
Two levers 6A and 6C connected to the two-phase switches 3A and 3C, respectively, are fixed to the operating shaft 4, and a lever 6B connected to the other one-phase switch 3B is fixed to the operating shaft 4. The two-phase switches 3A,
A bevel gear 7A fixed to one lever 6A of the two levers 6A and 6C connected to the lever 3C.
and a bevel gear 7B fixed to a lever 6B connected to the other one-phase switch 3B are configured to rotate in opposite directions to each other by a bevel gear 12 driven by a drive source 10.

"Operation" When the bevel gear 12 is rotated by the drive source 10,
Two levers 6A, 6C connected to the switches 3A, 3C located at the base of the triangle rotate in the same direction to open and close the switches 3A, 3C. At this time, switch 3B located at the apex of the triangle
The lever 6B connected to the two levers 6
This switch 3B is opened and closed by simultaneously rotating in the opposite direction to A and 6C. In this case, three-phase switch 3
A, 3B, 3C and three levers 6A, 6B, 6C
Since the distance between the three phases is the same for all three phases, the three-phase switches 3A, 3B, and 3C can be opened and closed in a good manner at the same time.

"Embodiments" Examples of the present invention will be described in detail below with reference to the drawings. Note that FIG. 1 is a front sectional view of an embodiment of the present invention, and FIG. 2 is a side view.

In these figures, three-phase switches 3A, 3B, and 3C having a movable contact 1 and a fixed contact 2 are arranged in a triangular shape. The rotatably supported operating shaft 4 has an axis parallel to the switches 3A and 3C, and is connected to the switches 3A, 3C and the switch 3B.
These three-phase switches 3A, 3B, 3C
They are arranged so that the distance between them is the same.

A lever 6A is connected to the movable contact 1 of the switch 3A via a rod 5, to which a bevel gear 7A is fixed and which is connected to the operating shaft 4 by a key 8A or the like.
is fixed to. Also, a lever 6B is connected to the movable contact 1 of the switch 3B via a rod 5.
A bevel gear 7B is fixed thereto, and is rotatably disposed on the operating shaft 4 by a bush 9 or the like. Further, a lever 6C connected to the movable contact 1 of the switch 3C via a rod 5 has a key 8.
It is fixed to the operating shaft 4 by C or the like. Note that the operating shafts 4 of the levers 6A, 6B, 6C
Regarding the positional relationship in the circumferential direction, the lever 6A and the lever 6C are located at the same position, and the lever 6B is disposed symmetrically to the axial center of the operating shaft 4 with respect to the axial center of the operating shaft 4. Also, these levers 6A, 6
B and 6C are prevented from moving in the axial direction of the operating shaft 4 by a stopper or the like (not shown).

On the other hand, a drive shaft 11 driven by a drive source 10
A bevel gear 12 is fixed to the lever 6A, and this bevel gear 12 is connected to the bevel gear 7 fixed to the lever 6A.
A and a bevel gear 7 fixed to the lever 6B.
It meshes with B.

Next, the operation of the above embodiment will be explained.

Figures 1 and 2 are switches 3A, 3B, and 3C.
shows an open circuit state, and in this state, the drive source 10
When the drive shaft 11 is rotated in the direction of arrow A, the bevel gear 12 also rotates integrally with the drive shaft 11. The bevel gear 7A meshed with the bevel gear 12 rotates clockwise in FIG. move. Therefore, the movable contact 1 of the switch 3A moves to the right via the rod 5, and the movable contact 1 moves to the fixed contact 2.
, and the switch 3A is closed. At this time, as described above, since the operating shaft 4 is also rotating clockwise, the lever 6C fixed to the operating shaft 4 also rotates clockwise together with the operating shaft 4, and the switch 3C The circuit is also closed in exactly the same way as the switch 3A.
On the other hand, as the bevel gear 12 rotates in the direction of arrow A, the bevel gear 7B, which is rotatably disposed on the operating shaft 4, rotates counterclockwise, and as a result, the lever 6B also rotates in the direction of the bevel gear 6B. rotates counterclockwise as one unit. Therefore, the movable contact 1 of the switch 3B moves to the right via the rod 5, and the movable contact 1 contacts the fixed contact 2, thereby closing the switch 3B.

The circuit closing operation of the switches 3A, 3B, 3C is performed by the switches 3A, 3B, 3C and the lever 6 as described above.
The distances to A, 6B, and 6C are the same,
In addition, as the bevel gear 12 of the drive shaft 11 rotates, the levers 6A, 6B, and 6C connected to the switches 3A, 3B, and 3C, respectively, rotate simultaneously. This will be done in batches.

In addition, the opening operation of the switches 3A, 3B, and 3C can be performed by rotating the drive shaft 11 in the direction opposite to the arrow A direction.
Since this is performed by an operation completely opposite to the above-mentioned circuit closing operation, the explanation thereof will be omitted.

``Effect of the invention'' As described above in detail with the embodiments, according to the invention, when the three-phase switches are not in a straight line, the three-phase switches are arranged in a triangular shape for effective use of space. In this case, the three-phase switch can be opened and closed at once with a simple and compact operating mechanism. Furthermore, since the driving force is transmitted by the bevel gears 7A and 7B without going through a link, it also has the advantage of reliable operation.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1. In the figure, 3A, 3B, 3C are switches, 4 is an operating shaft, 6A, 6B, 6C are levers, 7A, 7
B and 12 are bevel gears, and 10 is a driving source.

Claims (1)

[Scope of utility model registration request] Three-phase switches 3A, 3 arranged in a triangular shape
Lever 6A, 6 which B, 3C is arranged on operation shaft 4
In a device that opens and closes all three phases at once by reciprocating rotation of B and 6C, a switch that is parallel to the two-phase switches 3A and 3C among the three-phase switches 3A, 3B, and 3C and connected to the other one-phase switch 3B. Between the three-phase switch 3A,
The operating shaft 4 is arranged so that the distances from the two-phase switches 3A and 3C are the same, while the two levers 6 are connected to the two-phase switches 3A and 3C, respectively.
A, 6C are fixed to the operating shaft 4, and a lever 6B is connected to the other one-phase switch 3B.
the two levers 6 relative to the axis of the operating shaft 4.
A, 6C is rotatably disposed on the operating shaft 4 at a symmetrical position, and is fixed to one lever 6A of the two levers 6A, 6C connected to the two-phase switches 3A, 3C. The bevel gear 7A and the bevel gear 7B fixed to the lever 6B connected to the other one-phase switch 3B are configured to rotate in opposite directions to each other by a bevel gear 12 driven by a drive source 10. A switch operation mechanism characterized by: