JPH04328218A - Electric apparatus drive shaft holding device of closed distribution panel - Google Patents

Abstract

PURPOSE:To construct an electric apparatus drive shaft for a closed distribution board, in which an interiorly fitted electric apparatus such as a circuit breaker is driven by means of coupling of an operational device externally, in a structure as capable of retaining and displaying the operating position such as turned-off and-on of the electric apparatus in the condition that the operational device is kept removed. CONSTITUTION:A pin 7 penetrating in the diametric direction of an axially slidable drive shaft 2 and having a length greater than the dia. of the drive shaft 2, is installed at the end of this drive shaft 2 which is to couple an operational device. A baffle plate 9 provided with radial groove to be detained with the two ends of the pin 7 in the circuit breaker positioned in turned-off and-on is fixed to the bearing part around the drive shaft end in the condition that the operational device is kept removed. In the condition that this operational device is coupled, the pin 7 is slid, in the direction of disengaging it from the groove in the baffle plate 9, by means of insertion of an operating rod, and thus the drive shaft 7 is put free for rotating.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a closed power distribution board that connects an operating device from the outside to drive electrical equipment such as a disconnector installed in a closed power distribution board, and maintains its operating position even if the operating device is removed. This invention relates to an electrical equipment drive shaft holding device.

0002

[Prior Art] Electrical equipment such as a disconnector installed in a closed power distribution board is driven from the outside by having a drive shaft end of the electrical equipment protrude outside the closed power distribution board, and an operating device being connected to the end of the drive shaft. It is configured to be driven by

FIG. 3 is a structural diagram showing a conventional example of a drive shaft of a disconnecting switch, and FIG. 4 is a front view of FIG. 3 taken along the line X--X.

3 and 4, a bearing 1 fixed to a main body 4 of a closed switchboard rotatably supports a drive shaft 2 with one end protruding inside and the other end protruding outside. A bevel gear 2A is provided at the inner end of the drive shaft 2, and a blade 3 of a disconnector is connected via a bevel gear 3A that meshes with the bevel gear 2A. An operating shaft 5 of an operating device is coupled from the outside to the external shaft end of the drive shaft 2 protruding to the outside of the closed switchboard, and rotation of the operating shaft 5 rotates the blade 3 of the disconnector. There is.

A prismatic boss 5A is provided at the tip of the operating shaft 5, and the boss 5A is inserted into a prismatic boss hole 2B provided at the external shaft end of the drive shaft 2 and coupled thereto. The operating position of the disconnector is position 3B of the blade 3, which is shown by the solid line in Figure 3.
is set to ``off'', and position 3C shown by the dotted line, which contacts the fixed terminal 6 of the disconnector provided inside the closed switchboard, is set to ``on'', and these ``off'' and ``on'' positions are indicated on the controller side. It is normal for the structure to be

[0006]

[Problem to be Solved by the Invention] With such a conventional structure, when the operating device is removed from the drive shaft when inspecting the operating device, the drive shaft rotates due to the weight of the blade of the disconnector. , the blade position inside the closed switchboard cannot be determined from the outside. Furthermore, even if the operating device is removed at the "on" position so that the blade's own weight is not applied to the drive shaft, the blade's position is maintained by friction between the blade 3 and the fixed terminal 6, so the position is unstable. There is a problem.

Therefore, when reinstalling the operating device after inspection, it is necessary to open the closed switchboard and check the position of the blades before installing.If the closed switchboard is filled with insulating gas, it is necessary to fill it with insulating gas again. Additional work will be required.

[0008] Therefore, the purpose of the present invention is to
It is an object of the present invention to provide a structure of a drive shaft that can reliably hold the position of a blade even when an operating device is removed, and can confirm the position indication.

[0009]

[Means for solving the problem] A closed switchboard that maintains the position of a drive shaft that connects an operating device that externally drives electrical equipment such as a disconnector installed in the closed switchboard without connecting the operating device. An electric equipment drive shaft holding device comprising: a bearing that is fixed to the main body of a closed switchboard and rotatably supported with one end protruding outside the closed switchboard; and a shaft of the drive shaft that protrudes outside the closed switchboard. A long hole provided in the axial direction at the end, a pin having a length larger than the diameter of the drive shaft that passes through the long hole and slides in the axial direction of the drive shaft, and engages with both ends of the pin. A baffle plate having a radial groove and fixed to the main body of the closed switchboard; and a spring biasing the pin in a direction in which the pin and the groove of the baffle plate engage, and the baffle plate has a radial groove. shall have a symbol indicating the operating position of the electrical equipment at a position opposite to the groove.

0010

[Operation] According to the structure of the present invention, when the operating device is removed, the pin passing through the elongated hole at the end of the drive shaft is moved by the spring, engages with the radial groove provided in the baffle plate, and the pin passes through the elongated hole at the end of the drive shaft. prevents rotation and maintains its position. Further, the baffle plate with which the pin engages is provided with a radial groove, and a symbol indicating the operating position is provided at a position opposite to this groove, so that the operating position can be determined from this.

[0011]

Embodiment FIG. 1 is a structural diagram showing an embodiment of the present invention, and FIG. 2 is a front view of FIG. 1 as viewed from the Y--Y line. Figures 1 and 2
In this case, the structure for fixing the bearing 1 to the main body and the structure for driving the blades of the built-in disconnector are the same as in the conventional example, and therefore their explanation will be omitted.

In the present invention, a prismatic boss hole 2 is provided at the shaft end of the drive shaft 2 that protrudes outside the closed switchboard.
The depth of B is machined to be deeper than that of the conventional example, and the spring 8 is inserted deep into this boss hole 2B. Also, there is a long hole 2C in this part.
A pin 7 longer than the diameter of the drive shaft 2 is inserted into the elongated hole 2C with the spring 8 slightly compressed. The pin 7 can slide in the axial direction of the drive shaft 2 while compressing the spring 8 using the elongated hole 2C as a guide.

Furthermore, a baffle plate 9 is fixed to the main body 4 around the shaft end of the drive shaft 2 that protrudes to the outside of the closed switchboard. This baffle plate 9 has the blade 3 of the disconnector ``off'' and ``off''.
Radial grooves 9A and 9B are provided to engage the pin 7 in accordance with the position of the pin 7 in the "on" position.

With the above configuration, when the operating shaft 5 is connected to the drive shaft 2, the boss 5A of the operating shaft is inserted into the boss hole 2B of the drive shaft 2, and the boss 5A connects the pin 7 with the spring 8.
The drive shaft 2 is moved inward against the pressure to release the engagement between the pin 7 and the grooves 9A and 9B of the baffle plate 9, and the drive shaft 2 becomes rotatable when the operating device is connected.

[0015] Connect the operating device and disconnect the blade 3 of the disconnector.
When the operating device is removed after being operated to the "off" or "on" position, the pin 7 is returned by the spring 8, and the pin 7 engages with the grooves 9A and 9B of the baffle plate 9, causing the blade 3 to move to the "off" or "on" position. hold it in the ``off'' or ``on'' position. Furthermore, the baffle board 9
By providing an indication of "off" or "on" near the grooves 9A and 9B, the position of the blade 3 can be read by looking at the position of the pin 7.

[0016]

Effects of the Invention According to the present invention, even when the operating device is removed, the blade can be reliably held in the ``off'' or ``on'' position. Since the blade position of the disconnector can be clearly read by looking at the position of the pin that engages with the disconnector, there is no need to open the closed switchboard to check the blade position. Also, during inspection of the operating device, the manual handle can be used instead of the operating device to directly operate the operating device.

[Brief explanation of drawings]

[Fig. 1] Structural diagram showing an embodiment of the present invention

[Figure 2] Front view of Figure 1 seen from the Y-Y line

[Figure 3] Figure 3 is a structural diagram showing a conventional example of the drive shaft of a disconnector.

[Figure 4] Figure 3 is
-Front view seen from X-ray

[Explanation of symbols]

1 Bearing 2 Drive shaft 2B Boss hole 2C long hole 3 Blade 4 Main body 5 Operation axis 5A Boss 7 Pin 8 Spring 9 Baffle board 9A groove 9B Groove

Claims (2)

[Claims] Claim 1: An electrical device drive for a closed power distribution board in which a drive shaft connected to an operating device for externally driving an electrical device such as a disconnector installed in the closed power distribution board maintains its position without connecting the operating device. The shaft holding device includes a bearing that is fixed to the main body of the closed switchboard and is rotatably supported with one end protruding outside the closed switchboard, and an axial support on the shaft end of the drive shaft that protrudes outside the closed switchboard. an elongated hole provided in the elongated hole, a pin having a length larger than the diameter of the drive shaft that passes through the elongated hole and slides in the axial direction of the drive shaft, and a radial groove that engages with both ends of the pin. an electrical equipment drive shaft for a closed power distribution board, comprising: a baffle plate fixed to the main body of the closed power distribution board; and a spring that biases the pin in a direction in which the pin and the groove of the baffle plate engage with each other. holding device. 2. An electric equipment drive shaft holding device for a closed switchboard according to claim 1, wherein the baffle plate has a symbol indicating an operating position of the electric equipment at a position opposite to the radial groove.