JPH07147711A - Electrical-equipment driving shaft device for switchboard - Google Patents

Abstract

PURPOSE:To provide an electrical-equipment driving shaft device for a switchboard, in which the position of operation is held positively even under the state, in which an operating device is removed, the operating device cannot be taken off at positions except a specified position during the combination of the operating device and operation and there is no possibility that an electrical equipment is not damaged by excess operating force in the switchboard driving the electrical equipment such as an interiorly finished disconnector by coupling the operating device from the outside. CONSTITUTION:An electrical-equipment driving shaft device for a switchboard consists of a bearing body 1 being fixed onto the main body 4 of the switchboard and rotatably bearing a driving shaft 2, a slot 2D formed in the axial direction at the shaft end of the driving shaft 2, a pin 7 penetrated into the slot and slid and moved in the axial direction of the driving shaft, a keep plate 9 having radial grooves engaged with both ends of the pin and being fastened onto the bearing body 1, a spring 8 energizing the pin 7 in the direction that the pin 7 and the grooves of the keep plate 9 are engaged, and an operating device 5 having a finny projection 5B interlinked with the radial grooves formed to the keep plate on an outer circumference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device drive shaft device for a switchboard for driving an electric device such as a disconnector installed in the switchboard by connecting an operating device from the outside.

[0002]

2. Description of the Related Art Electrical equipment such as a disconnector installed in a switchboard is driven by externally driving the drive shaft end of the electrical equipment by projecting it to the outside of the switchboard and connecting an operating device to the drive shaft end. Is configured to be. FIG. 6 is a structural view showing a conventional example of a drive shaft of a disconnector, and FIG. 7 is a sectional view of FIG. 6 taken along line XX.

6 and 7, the main body 4 of the switchboard
A drive shaft 2 having one end protruding inside and the other end protruding outside is rotatably supported by a bearing body 1 fixed to. This drive shaft 2
Bevel gear 2A is provided at the inner end of the bevel gear 3 and meshes therewith.
The blade 3 of the disconnector is connected via A. A manipulator 5 is externally coupled to the outer shaft end of the drive shaft 2 protruding to the outside of the switchboard, and the blade 3 of the disconnector is rotated by the rotation of the manipulator 5.

A rectangular cylindrical hole 5A is provided at the tip of the operating device 5, and the hole 5A is inserted into and coupled to a prismatic boss 2B provided at the outer shaft end of the drive shaft 2. As for the operation position of the disconnector, the position 3B of the blade 3 shown by the solid line in FIG. 6 is set to “OFF”, and the position 3C shown by the alternate long and short dash line in contact with the fixed terminal 6 of the disconnector provided inside the switchboard is “ON”. age,
Normally, the "off" and "on" positions are displayed on the operating device side.

[0005]

In such a conventional structure, when the operating device is detached from the drive shaft, the drive shaft rotates due to the weight of the blade of the disconnector, so that the position of the blade inside the switchboard is outside. Can no longer be identified. Further, even if the operation device is detached at the "on" position so that the blade's own weight does not act on the drive shaft, the position of the blade is held by the friction between the blade 3 and the fixed terminal 6, so that the position is unstable. I have a problem.

[0006] Alternatively, there is a possibility that the operation device is accidentally removed during operation and the operation device is left in a state where the function is not satisfied. Therefore, when re-installing the controller, it is necessary to open the switchboard and check the position of the blade before performing the installation work.In the case of a closed switchboard with an insulating gas filling type, extra work such as refilling the insulating gas is required. Occur.

Further, when the operating device is manually operated, an excessive force may be applied to cause an operation exceeding the operable range of the drive shaft to damage the device. Therefore, an object of the present invention is to reliably hold the operating position even when the operating device is detached, and to connect the operating device so that the operating device cannot be removed at a position other than the predetermined position during operation, and excessive operation is required. An object of the present invention is to provide an electric device drive shaft device for a switchboard that does not damage the device by force.

[0008]

In order to solve this problem, a drive shaft for connecting an operating device for externally driving an electric device such as a disconnector mounted in a switchboard is provided in a state where the operating device is not connected. An electric equipment drive shaft device for a switchboard, which has a stopper function for holding the position and limiting the rotational movement angle of the drive shaft in a state where the drive unit is connected, and which prevents the drive unit from being removed during operation. The bearing body that is fixed to the main body of the drive shaft to rotatably support the drive shaft, the long hole provided in the axial direction at the shaft end of the prismatic column protruding outside the switchboard of the drive shaft, and the long hole A pin having a length larger than one side of the prismatic shaft that penetrates and slides in the axial direction of the drive shaft, and a radial groove that engages with both ends of the pin are fixed to the bearing body. The press plate is engaged with the pin and the groove of the press plate. A spring for biasing the pin in the direction of,
An operating device having a groove that fits the pin on the end surface and a fin-shaped projection that engages with a radial groove provided on the pressing plate on the outer periphery of the shaft end.

Further, the radial groove of the pressing plate has an axial length several times as large as the diameter of the pin engaging with this groove, and the diameter of the pin from the end surface of the pressing plate on the outer side of the switchboard is smaller than the diameter of the pin. Is provided with a fan-shaped notch connecting the outer circumference of the radial groove from the slightly longer length to the inner side of the switchboard.

[0010]

According to the structure of the present invention, when the operating device is removed, the pin penetrating through the elongated hole at the end of the drive shaft is moved by the spring and engages with the radial groove provided in the pressing plate, and the drive shaft is driven. To prevent its rotation and maintain its position. When the operating device is attached, the pin is pushed against the spring, the engagement between the pin and the radial groove provided on the pressing plate is released, and the drive shaft can be rotated. Further, while the drive shaft is rotating, the fin-shaped projection provided on the outer periphery of the shaft end of the operating device hits the pressing plate at a position other than the predetermined position, and the operating device cannot be removed.

Further, when the drive shaft is rotated a predetermined angle with the operating device attached, the fin-shaped projection provided on the operating device hits the end of the fan-shaped notch of the pressing plate to change the rotational angle of the driving shaft. Restrict.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial cross-sectional structural view showing an embodiment of the present invention, FIG. 2 is a state diagram in which operating devices are combined in FIG. 1, and FIG.
Is a sectional view taken along line YY, FIG. 4 is a sectional view taken along line ZZ in FIG. 1, and FIG. 5 is a sectional view taken along line WW in FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5, the structure for fixing the bearing body 1 to the main body 4 of the switchboard and the structure for driving the blade 3 of the disconnector installed therein are the same as those of the conventional example. Is omitted.

In the present invention, the hole 2C into which the spring 8 is inserted is machined in the prismatic boss 2B provided on the shaft end portion of the drive shaft 2 which projects to the outside of the switchboard, and the spring 8 is formed at the back of this hole 2C. Insert. Further, an elongated hole 2D is provided in this portion, and a pin 7 longer than one side of the prismatic boss 2B is inserted into the elongated hole 2D with the spring 8 slightly compressed. Pin 7 is a long hole 2D
The spring 8 can be slid and moved in the axial direction of the drive shaft 2 while compressing the spring 8 using the guide as a guide.

Further, a pressing plate 9 is fixed to the bearing body 1 around the shaft end portion of the drive shaft 2 protruding outside the switchboard. The pressing plate 9 has a pin 7 corresponding to the position of the pin 7 when the blade 3 of the disconnector is in the "OFF" and "ON" positions.
And radial grooves 9A and 9B that engage as shown in FIG.
Is provided. The length of the grooves 9A and 9B in the axial direction of the pressing plate is several times the diameter of the pin 7, and from the end surface of the pressing plate 9 on the outer side of the switchboard slightly larger than the diameter of the pin 7 As shown in FIG. 4, a fan-shaped notch 9C connecting the outer circumferences of the radial grooves is provided on the inner side of the.

The operating device 5 has a half-moon shaped groove 5C which fits with the pin 7 on its end face, and further engages with and can pass through the groove 9A or 9B of the pressing plate 9 on the outer periphery of the shaft end.
A fin-shaped projection 5B as shown in FIG. By configuring as described above, the manipulator 5 is provided with the groove 5 on the end face thereof.
When C is aligned with the pin 7 and coupled to the drive shaft 2, the boss hole 5A of the operating device is inserted into the boss 2B of the drive shaft 2, and the end face of the operating device 5 moves the pin 7 against the spring 8 inward. Then, the engagement between the pin 7 and the groove 9A or 9B of the pressing plate 9 is released, and the drive shaft 2 is rotatable in the state in which the operating device 5 is connected. When rotated to a predetermined position, the projection 5B hits the contact surface 9D of the pressing plate 9 shown in FIG. 4 and acts as a stopper to limit the rotation angle of the drive shaft 2 so that an excessive force is not applied to the disconnector or the like. It has become.

When the operating device is removed after the operating device is connected and the blade 3 of the disconnecting switch is operated to the "OFF" or "ON" position, the pin 8 is returned by the spring 8 and the pin 7 is pressed. The blade 3 is held in the “off” or “on” position by engaging with the groove 9A or 9B of the plate 9. A fin-shaped projection 5B provided on the outer periphery of the shaft end of the operating device at a position other than a predetermined position, that is, "OFF" or "ON", while the drive shaft is rotating.
Since it hits the pressing plate 9, the operating device cannot be removed.

[0017]

According to the present invention, the operating position is securely held even when the operating device is removed, and the operating device cannot be pulled out at a position other than the predetermined position during operation by connecting the operating device. It is possible to obtain an electric device drive shaft device for a switchboard in which the position setting operation is reliable and the device is not damaged by an excessive operating force.

[Brief description of drawings]

FIG. 1 is a partial sectional structural view showing an embodiment of the present invention.

FIG. 2 is a state diagram in which an operating device is connected to FIG.

FIG. 3 is a cross-sectional view of FIG. 1 taken along line YY.

FIG. 4 is a cross-sectional view of FIG. 1 taken along line ZZ.

5 is a cross-sectional view of FIG. 1 taken along line WW.

FIG. 6 is a structural diagram showing a conventional example of a drive shaft of a disconnector.

FIG. 7 is a cross-sectional view of FIG. 6 taken along line XX.

[Explanation of symbols]

 1 bearing body 2 drive shaft 2B boss 2C hole 2D long hole 3 blade 4 main body of switchboard 5 operator 5A boss hole 5B protrusion 5C half-moon shaped groove 7 pin 8 spring 9 presser plate 9A groove 9B groove 9C notch 9D contact surface

Claims (2)

[Claims] 1. A drive shaft for connecting an operating device for externally driving an electric device such as a disconnector installed in a switchboard, holds its position without connecting the operating device, and connects the operating device with the operating device. An electrical equipment drive shaft device for a switchboard that has a stopper function that limits the rotation angle of the drive shaft and that does not allow the actuator to be removed during operation. It is fixed to the switchboard body and the drive shaft can be rotated. Bearing, the elongated hole provided in the axial direction at the axial end of the prismatic column that protrudes outside the switchboard of this drive shaft, and the slide shaft that penetrates this elongated hole and slides in the axial direction of the drive shaft. A pin having a length larger than one side of the prismatic shaft, a pressing plate fixed to the bearing body having a radial groove engaging with both ends of the pin, and the pin and the groove of the pressing plate. The spring that urges the pin in the engaging direction and the front face Switchboard electrical equipment drive shaft apparatus characterized by comprising a manipulator having a fin-like projection which engages the radial groove provided in the plate presser on the outer periphery of the shaft end has a groove that mate with pins. 2. The radial groove of the pressing plate according to claim 1, wherein an axial length of the radial groove is several times as large as a diameter of a pin engaging with the groove, and a radial board of the pressing plate is provided. An electric machine drive shaft device for a switchboard, comprising a fan-shaped notch that connects the outer circumference of a radial groove from a length slightly larger than the diameter of the pin to the inner side of the switchboard from the outer end surface.