JPH0448603Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field The present invention relates to a disconnector operating device for opening and closing a disconnector.

(2) Prior Art When a disconnector is used to open or close an electric circuit through which a loop current or the like flows, the opening and closing operations must be performed at a certain speed. Pneumatic operation may be considered for opening and closing the circuit, but this is not so desirable in terms of maintenance and labor savings.

Therefore, an electric spring operation type operating device is used in which the force for opening and closing operations is temporarily stored (charged) in a spring by a motor, and then the circuit is opened and closed (discharged) by the biasing force of the spring.

A conventional electric spring operated operating device is shown in FIG. As shown in the figure, an operating spring 3 serving as a biasing means is coupled to an arm 2 fixed approximately at the center of a rotatable operating shaft 1, so that the rotated operating shaft 1 always returns to the neutral position B. It's getting old. An arm 5 is connected to one end of the operating shaft 1 via an operating clutch 4, and the tip of the arm 5 is connected to a disconnector 6. The other end of the operating shaft 1 is connected to a drive means 8 via a charging clutch 7. The driving means 8 includes a worm wheel 10 connected to the charging clutch 7 via an arm shaft 9, and a worm 12 attached to the rotating shaft of a motor 11 meshing therewith. That is, 13 is a spring charging mechanism section for charging the operating spring 3, and 14 is a spring operating mechanism section that opens and closes the disconnector 6 by the biasing force of the charged operating spring 3.

When closing the disconnector 6 using such an operating device, the operating clutch 4 is disengaged and the charging clutch 7 is engaged, the motor 11 is rotated in the direction a, and the operating shaft 1 is rotated in the direction c. When the arm 2 rotates to position A against the biasing force of the operating spring 3, the rotation of the motor 11 is stopped, and when the operating clutch 4 is engaged and the charging clutch 7 is disengaged, the arm 2 is rotated by the biasing force of the operating spring 3. At the same time as arm 2 rotates from position A to position B, arm 5, which was at position f, rotates to position e, and disconnector 6 closes. Conversely, when opening the disconnector 6, the operating clutch 4 is disengaged and the charging clutch 7 is engaged, the motor 11 is rotated in the direction b, and the operating shaft 1 is rotated in the direction d. When the arm 2 rotates from the neutral position B to the position C against the biasing force of the operating spring 3, the rotation of the motor 11 is stopped, and when the operating clutch 4 is engaged and the charging clutch 7 is disengaged, the operating spring 3 is released. Arm 2 rotates from position C to position B due to the biasing force, and at the same time arm 5, which was at position e, rotates to position f, and disconnector 6 opens.

However, when charging the operating spring,
The direction of rotation of the motor must be switched in response to the opening and closing of the disconnect switch, which makes the motor control circuit shown in Figure 2a and the motor operation circuit shown in Figure 2b complicated, and the number of circuit components increases. There will be more. In other words, economic efficiency and reliability cannot be fully satisfied.
In addition, in Fig. 2, CS is the control operation switch, 8
8MC is an electromagnetic switch for "on", 88MD is for "off"
Electromagnetic switch for motor, 89MA is amateur for motor,
89MF is a motor field, and LS1 and LS2 are limit switches.

(3) Purpose of the invention Therefore, the object of the present invention is to provide a disconnector operating device that can open and close the disconnector without changing the rotational direction of the motor.

(4) Summary of the invention The present invention provides a reduction means for reducing the rotational speed of the motor between the motor and the operating shaft, and a crank mechanism that converts rotational motion into reciprocating rotational motion of the operating shaft. The operating shaft can be rotated back and forth without changing the direction of rotation.

(5) Embodiments Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings. The present invention is a partial improvement of the conventional operating device, so the same parts are given the same reference numerals and only the differences will be explained.

The structure of the operating device according to the present invention is as shown in FIG. That is, the drive means 20 for reciprocating the operation shaft 1 includes a motor 21, a deceleration means 22,
It is comprised of a crank mechanism 23 that converts rotational motion into reciprocating rotational motion of the operating shaft 1.

First, the deceleration means 22 will be explained. As shown in the figure, a deceleration shaft 24 is rotatably supported, and the deceleration shaft 24 is rotatably supported.
A base end portion of a swing lever 26 is attached to 4 via a one-way clutch 25. A U-shaped notch 27 is formed at the tip of the swing lever 26, and an eccentric cam 28, which is integrally fixed to the rotating shaft of the motor 21, is loosely fitted into the notch 27 so as to be freely rotatable. In addition, a one-way clutch 2 for rotating the deceleration shaft 24 only in a certain direction
9 is provided between the deceleration shaft 24 and a member that supports the deceleration shaft 24.

Next, the crank mechanism 23 will be explained.

The base end of the arm 30 is fixed to the end of the deceleration shaft 24, and the base end of the arm 31 is also fixed to the end of the arm shaft 9. The tips of the arms 30 and 31 are rotatably coupled to the end of the rod 32 via pins, respectively.

Due to the above structure, when the motor 21 rotates in the direction of the arrow in the figure, the eccentric cam 28
rotates, and the swing lever 26 swings vertically about the deceleration shaft 24. Then, due to the action of the one-way clutch 29, the deceleration shaft 2
4 is designed not to rotate in the opposite direction to the arrow, so the reduction shaft 24 is connected to the one-way clutch 25.
As a result, the swing lever 26 is rotated by the amount by which the swing lever 26 swings downward. That is, the rotation speed of the deceleration shaft 24 is reduced to be sufficiently lower than the rotation speed of the motor 21. The rotational movement of the deceleration shaft 24 decelerated in this manner is changed by the crank mechanism 23 into a reciprocating rotational movement of the arm shaft 9, that is, a reciprocating rotational movement of the operating shaft 1. Therefore, the disconnector 6 can be opened and closed without changing the direction of rotation of the motor 21.

Next, the operation of the operating device when closing and opening the disconnector 6 will be explained based on FIG. 5, respectively. In addition, the numbers in the figure indicate the component parts, A is "off state", B is "on operation", C is "on state", D is "off operation", E is "in command", and F is ""T" indicates "Charge", "C" indicates "Discharge", and "R" indicates the dead point of the operating spring. When closing the disconnector 6, the arm 30 rotates 180 degrees from the state shown by the solid line in FIG. 3 to the state shown by the broken line. Then, as described above, the arm 2 rotates from position B to position A, and charging is completed. Next, the arm 2 returns from the broken line state to the solid line state, that is, from the position A to the position B, and discharge is completed, and at the same time the disconnector 6 is closed. On the other hand, when opening the disconnector 6, the fourth
The arm 30 changes from the solid line state to the broken line state in the figure.
Rotate 180°. Then, the arm 2 rotates from position B to position C, and charging is completed. Next, from the broken line state to the solid line state, that is, arm 2
returns from position C to position B, completing discharge, and at the same time, disconnector 6 opens.

Next, the control circuit of the motor in the operating device of the present invention is shown in FIG.
Shown in Figure b. Note that the reference numerals shown in FIG. 6 are the same as the parts shown in FIG. 2. As can be seen by comparing FIG. 2 and FIG. 6, the motor control circuit and operation circuit are simpler than the conventional ones, and the number of parts constituting the circuit is small.

Note that the biasing means is not limited to an operating spring.

(6) Effects As described above with the examples and drawings,
According to the present invention, since the deceleration means and the crank mechanism are provided between the motor and the operating shaft, the disconnector can be opened and closed without changing the direction of rotation of the motor. Additionally, the motor control circuit and operation circuit are simplified, and the number of components constituting the circuit can be reduced. That is, the reliability and economical efficiency of the operation of the disconnector are high.

[Brief explanation of the drawing]

Figures 1 and 2 relate to a conventional disconnect switch operating device, where Figure 1 is a structural diagram, Figure 2a is a motor control circuit diagram, Figure 2b is a motor operation circuit diagram, and Figure 3 is a diagram of a motor control circuit. ~
FIG. 6 relates to a disconnector operating device according to the present invention,
Figure 3 is a structural diagram of the operating device before charging starts for the "ON" operation, Figure 4 is a structural diagram of the operating device before charging starts for the "OFF" operation, and Figure 5 shows each of the operating devices. FIG. 6A is a motor control circuit diagram, and FIG. 6B is a motor operation circuit diagram. 1... Operating shaft, 2, 5, 30, 31... Arm, 3... Operating spring, 4... Operating clutch, 6
...Disconnector, 7...Charging clutch, 20...
... Drive means, 21 ... Motor, 22 ... Reduction means, 23 ... Crank mechanism, 24 ... Reduction shaft, 2
5, 29... One-way clutch, 26... Swing arm, 27... Notch, 28... Eccentric cam, 32... Rod.

Claims (1)

[Scope of utility model registration request] an operating shaft rotatably supported; a biasing means for returning the operating shaft rotated in both directions to a neutral position; an arm connected to one end of the operating shaft via an operating clutch and connected to a disconnector; A disconnector operating device comprising a drive means connected to the other end of an operating shaft via a charging clutch and capable of reciprocally rotating the operating shaft, the drive means 20 includes a motor 21 and a rotating A swing lever 26 is attached at the base end of the swing lever 26 to the freely provided deceleration shaft 24 via a one-way clutch 25, and a notch 27 is formed at the tip of the swing lever 26. It is composed of a deceleration means 22 in which an eccentric cam 28 integral with the rotational shaft of the motor 21 is loosely fitted in a rotatable manner, and a crank mechanism 23 that converts the rotational movement of the deceleration shaft 24 into a reciprocating rotational movement of the operating shaft 1. A disconnector operating device characterized by: