JP2000208004A - Mechanical locking mechanism of switchgear operating device - Google Patents

Abstract

(57) [Summary] [Problem] When a switch is not operated, it can be mechanically locked at an operation device side so that the switch does not operate by an external force from the switch side. In the event of an emergency stop when the vehicle is in operation, it can be stopped immediately, and even if an external force acts in that state, it can be mechanically locked so as not to operate. SOLUTION: A lock cam 17 is fixed to an operation shaft 2 for transmitting rotation of a motor 3 to a switch. On the lock cam 17,
A plurality of rotation stopping grooves 17a and 17b which engage with the lock lever 14 at the closing and opening completion positions and a large number of lock grooves 17c which can be engaged with the lock lever 14 in the middle thereof are provided. When the switch is operated, the lock lever 14 is disengaged by the operation of the claw release coil 6 which is excited by a command, and when the lock is applied, the command is released to release not only the closing and opening completion positions but also the opening and closing. Emergency stop during operation and mechanical locking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical lock mechanism of an operating device used for a switch such as a disconnector.

[0002]

2. Description of the Related Art Generally, a mechanical lock mechanism used in an operation device for a switch such as a disconnector is locked when an opening / closing operation of the switch is completed, and the state is maintained.

FIGS. 3A and 3B show an example of a mechanical lock mechanism of a conventional switch operating device. FIG. 3A is a top view and FIG. 3B is a side view. In FIG. 3, an operation shaft 2 for transmitting rotation of the motor 3 to a switch (not shown) is connected to a motor 3 fixed to the frame 1 via a gear (not shown). A lock cam 4 having rotation stopping grooves 4a and 4b is fixed to the operation shaft 2. The lock cam 4 includes a stopper pin 10a that stops the switch at the closing completion position,
Stopper pins 10b for stopping at the release completion position are attached, and the operation is stopped by abutting against a stopper 12 fixed to the frame 1.

A leaf spring 11 is fixed to the frame 1, and the leaf spring 11 presses the stopper pins 10a and 10b to maintain the operation completion position.

The L-shaped lock lever 5 has a base end fixed to a pin 8 rotatably supported by a bearing 9 fixed to the frame 1, and a pawl puller fixed to the frame 1 via a link 7. It is incorporated in the release coil 6 and is connected to a plunger 13 that operates by exciting the claw release coil 6.

[0006] In the above mechanical lock mechanism, usually,
That is, at the opening / closing operation completion position where the switch is not opened / closed, the distal end of the L-shaped lock lever 5 is fitted into the rotation stopping groove 4b or the rotation stopping groove 4a of the lock cam 4, so that the external force transmitted from the switch is operated. The operating device does not operate even when it acts on the shaft 2. In this state, the stopper pin 10b or the stopper pin 1
0a is located between the stopper 12 and the leaf spring 11, and the fine movement at the opening completion position or the closing completion position is regulated.

FIG. 3 shows the state of the operating device when the switch is opened, and when the switch is opened,
In response to an electric command, the nail release coil 6 is excited, the plunger 13 is attracted, the L-shaped lock lever 5 is rotated with the pin 8 as a fulcrum, and the L-shaped lock lever 5 is pulled out of the rotation stopper groove 4b of the lock cam 4 to lock the lock cam 4. Cancel. Thereafter, when the motor 3 is rotated, the rotational force is transmitted to the operation shaft 2, and the operation shaft 2 rotates clockwise.

At this time, since the lock cam 4 also rotates clockwise integrally with the operation shaft 2, the stopper pin 10b
Is separated from between the stopper 12 and the leaf spring 11 against the spring force of the leaf spring 11. And the operation shaft 2 is approximately 18
When the switch is turned by 0 degrees and immediately before the closing of the switch is completed, the power supply to the motor 3 is cut off, the switch is turned on, and the rotation of the operation shaft 2 is stopped. At the same time, the electric command is cut off, the excitation of the nail release coil 6 is released, and the suction of the plunger 13 is stopped.
Pivots around the pin 8 via the link 7 and returns.

At this time, since the detent groove 4a has reached the position where it engages with the L-shaped lock lever 5, the tip of the L-shaped lock lever 5 fits into the detent groove 4a, and the operating shaft 2 is locked. become. Further, in this state, the stopper pin 10a also fits between the stopper 12 and the leaf spring 11, so that the fine movement of the operating shaft 2 in the closed state is also restricted.
In addition, since the opening operation of the switch is performed by an operation completely opposite to the closing operation, the description thereof is omitted.

[0010]

However, in the conventional mechanical lock mechanism of the switch operating device, the mechanical lock of the operating shaft 2 works only at the closing completion position and the opening completion position of the switch. That is, conventionally, when it is desired to stop the operation urgently during the opening / closing operation, the circuit is electrically cut off and the operation is stopped by cutting off the power supply to the motor 3. However, even if an attempt is made to stop the operation by turning off the power of the motor 3 during the operation, the operation cannot be stopped immediately due to the inertia force from the switch side or the inertia force of the motor 3.

When the motor is stopped halfway, L
The lock lever 5 is provided with the rotation preventing grooves 4a, 4
Since it does not engage with any of b, the mechanical lock is not engaged, and the operating shaft 2 may move due to an external force from the switch side, and the switch may operate.

Accordingly, the present invention provides a mechanical lock mechanism for an operating device that can be stopped urgently during operation and that does not operate even if an external force is applied from the switch side.

[0013]

According to the present invention, a switch is opened and closed by an operation shaft reciprocally rotated by a motor, and the operation shaft is locked at a position where the switch is completely opened and closed. In the mechanical lock mechanism of the switch operating device, the mechanical locking mechanism is fixed to the operating shaft, and has a rotation stop groove provided at a release and closing completion position, and a plurality of rotation stop grooves are provided between the two rotation stop grooves. A lock cam having a lock groove, a lock lever rotatably supported by a frame and removably engaging the rotation stop groove and the lock groove of the lock cam, and a lock lever attached to the lock lever. A spring for applying a force in a direction to be engaged with the detent groove and the lock groove, and connected to the lock lever,
A claw release coil for applying a force in a direction to release the lock lever from the rotation stop groove and the lock groove, and during the opening and closing operation of the switch, the excitation of the claw release coil is released. The operation shaft can be locked by engaging the lock lever with the lock groove.

Thus, at the closing completion position and the opening completion position of the switch, the operating shaft 2 is always locked by the engagement of the lock lever with the rotation stopper groove of the lock cam, and external force is applied from the switch side. When working, the switch does not work. When performing the opening and closing operation, an electric operation command is given to the nail releasing coil, and the nail releasing coil is excited,
The operation can be performed by releasing the lock lever from the rotation stopping groove of the lock cam.

If it is desired to stop the operation of the switch urgently during the operation of the switching operation, the excitation applied to the nail releasing coil is released by electrically cutting off the operation command. When the lock lever is engaged with any one of the plurality of lock grooves of the lock cam, the operation shaft is locked, rotation of the operation shaft is stopped, and the switch can be stopped.

[0016]

FIG. 1 shows an embodiment of a mechanical lock mechanism of a switch operating device according to the present invention.
(A) is a top view, (B) is a front view of (A). FIG.
Is a top view for explaining the operation, (A) shows the state of the operating device at the opening completion position of the switch, (B)
Indicates that the operating device is locked during the closing operation,
(C) shows the state of the operating device at the loading completion position.

In FIG. 1, a lock cam 17 is fixed to the operation shaft 2. The lock cam 17 is provided with a stopper pin 10a for stopping the switch at the closing completion position and a stopper pin 10b for stopping at the opening completion position. The stopper cam 10 comes into contact with the stopper 12 fixed to the frame 1 to perform the operation. It is designed to stop. The lock cam 17 is provided with a rotation stop groove 17a in which the lock lever 14 is engaged at the closing completion position and a rotation stop groove 17b in which the lock lever 14 is engaged at the release completion position. A large number of lock grooves 17c that can be engaged with the rotation stop grooves 17c are provided at arbitrary positions between the rotation stop grooves 17a and the rotation stop grooves 17b.

The lock lever 14 has a base end fixed to a pin 15 rotatably supported by a bearing 18 fixed to the frame 1, and is formed rotatably with the pin 15 as a fulcrum. 17 rotation stop groove 17
a, a spring 17 which always acts in a direction engaging with the lock groove 17c is mounted. In the center of the lock lever 14, a claw release coil 6 that is excited by an electric command, a plunger 13 that is operated by exciting the claw release coil 6, and a link 16 that transmits the operation to the lock lever 14 are provided. Are connected, and the rotation stopping grooves 17a and 17b and the locking groove 17c of the lock cam 17 are connected.
And the lock lever 14 can be disengaged.

Next, the operation of the above-described lock mechanism of the present invention will be described. In a normal state, that is, when the opening / closing operation without opening / closing the switch is completed, the rotation stopper groove 17b of the lock cam 17 is at the position where the end of the lock lever 14 is in the open completion position.
In addition, at the closing completion position, each is fitted into and engaged with the rotation stopping groove 17a, so that even if an external force transmitted from the switch acts on the operation shaft 2, the operation is not performed. The state is shown in FIG. 2 (A) or (C).

When the switch is closed, the operation shown in FIG.
In the open state of the switch shown in (A), the pawl release coil 6 is excited by the electric command, the plunger 13 is sucked, the lock lever 14 is supported by the pin 15, and the rotation stopping groove 17 b of the lock cam 17 is turned on. And the lock of the lock cam 17 is released. Thereafter, when the motor 3 is rotated, the rotational force is transmitted to the operation shaft 2, and the operation shaft 2 rotates clockwise. At this time, since the lock cam 17 also rotates clockwise integrally with the operation shaft 2, the stopper pin 10 b resists the spring force of the leaf spring 11 and
2 and leaves from the leaf spring 11.

When the operating shaft 2 is rotated by approximately 180 degrees, and immediately before the switch is turned on, the power supply to the motor 3 is cut off, the switch is turned on, and the operating shaft 2 is turned on. Rotation stops. At the same time, the electric directive was cut off,
The excitation of the nail release coil 6 is released, and the plunger 13 is released.
Is stopped, the lock lever 14 is moved to the link 16
Via the pin 15 as a fulcrum, and return. At this time, since the rotation stop groove 17a has reached the position where it engages with the lock lever 14, the tip of the lock lever 14 fits into the rotation stop groove 17a, and the operation shaft 2 is locked. Further, in this state, the stopper pin 10a also fits between the stopper 12 and the leaf spring 11, so that the fine movement of the operating shaft 2 in the closed state is also restricted.

On the other hand, when it is desired to stop the operation urgently in the course of the closing operation, the power supply to the motor 3 is cut off by stopping the operation of the motor 3 by electrically cutting off the operation command. The excitation of the coil 6 is released, and the suction of the plunger 13 is stopped. Thereby, the lock lever 1
4 rotates via the link 16 with the pin 15 as a fulcrum, and returns, so that the distal end of the lock lever 14 fits into the lock groove 17c, and the operation shaft 2 is locked.

In the above process, the motor 3 does not stop immediately even if the supply of power is cut off, but does not stop immediately, but rotates due to inertial force. Therefore, the operating shaft 2 also slightly rotates. The lever 14 securely fits into one of the plurality of lock grooves 17 c to stop the rotation of the operation shaft 2 and lock the operation shaft 2. The closing operation of the switch has been described above. However, since the opening operation is performed by an operation completely opposite to the closing operation, the description is omitted.

[0024]

According to the present invention, when the operation in the normal state is not performed, the operating shaft can be mechanically locked on the operating device side so that the switch does not operate by external force. In the case of urgently stopping the switch when the switch is opening and closing, the lock lever of the operating device can be stopped immediately by engaging the lock lever of the lock cam with the lock groove. Thus, even if an external force acts from the switch side, the operating device can be mechanically locked so that the switch does not operate.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of a mechanical lock mechanism of a switch operating device of the present invention, in which (A) is a top view,
(B) is a front view of (A).

FIG. 2 is a top view for explaining the operation, in which (A) shows a state of the operation device at a position where the opening of the switch is completed;
(B) shows a state where the operating device is locked during the closing operation, and (C) shows a state of the operating device at the closing completion position.

3A and 3B show an example of a mechanical lock mechanism of a conventional switch operating device, wherein FIG. 3A is a top view and FIG. 3B is a side view.

[Explanation of symbols]

 1 Frame 2 Operating shaft 3 Motor 6 Claw release coil 14 Lock lever 15 Pin 16 Link 17 Lock cam 17a, 17b Detent groove 17c Lock groove 18 Bearing 19 Spring

Claims (1)

[Claims] An open / close operation of a switch is performed by an operation shaft reciprocally rotated by a motor, and a mechanical lock mechanism of a switch operating device for locking the operation shaft at a position where the switch is completely opened and closed. A lock cam fixed to the operation shaft, having a rotation stop groove provided at each of the opening and closing completion positions, and having a plurality of lock grooves provided between the two rotation stop grooves; A lock lever rotatably supported by the frame and removably engaging the rotation stop groove and the lock groove of the lock cam; and a lock lever mounted on the lock lever, and locking the lock lever with the rotation stop groove and the lock. A spring that applies a force in a direction to be engaged with the groove; and a spring that is connected to the lock lever. A claw release coil for applying a force in a direction to be detached from the lock groove, wherein the lock lever is engaged with the lock groove by releasing the excitation of the claw release coil during the opening / closing operation of the switch. A mechanical lock mechanism of the switch operating device, wherein the operating shaft is made lockable.