JPS64775B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric operating device for a switch such as a disconnector, and more particularly to a connection for transmitting rotational force between an operating electric motor for rotating an operating shaft and the operating shaft. The present invention also relates to a power attachment/detachment device in which connection is made from the electric motor side at the start of an opening/closing operation, and conversely, disconnection is made from the operating shaft side when the opening/closing operation is completed.

An electric operating device for a switch such as a disconnector reduces the rotational force of an electric motor using a gear or the like, and then transmits the reduced rotational force to a link mechanism of the switch to open and close the main body of the switch. Then, when the switch body reaches the closing complete position or opening complete position, these positions are detected by the limit switch and the motor is cut off.
It is designed to be stopped. However, even after the electric motor is cut off, it does not stop immediately and continues to rotate due to its surplus inertial energy. Therefore,
If excess rotational force is directly transmitted to the link mechanism of the switch, it will continue to be driven even though the switch body has already reached the opening/closing position, resulting in damage to the equipment or failure to maintain the specified insulation distance. A situation arises in which people become accustomed to each other.

As a solution to this problem, conventionally, an electromagnetic clutch was interposed between the link mechanism of the switch and the electric motor, and the electromagnetic clutch was disconnected immediately after the electric power was cut off to disconnect the surplus inertial energy of the electric motor from the link mechanism. . However, the above solutions have drawbacks such as the electromagnetic clutch being very expensive and the stopping position fluctuating and becoming unstable due to the residual magnetism of the electromagnetic clutch after the power supply is cut off.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a power attachment/detachment device for an electric operating device that is mechanically simple and reliable in operation.
The drawings shown as embodiments of the present invention will be described in detail below.

As shown in FIGS. 1 to 3, a first shaft 1 is rotatably supported by upper and lower frames 2, 2a.
A gear 3 provided at the upper end of the shaft 1 is connected to an operating shaft 5 of the switch via a speed reduction mechanism 4.
Furthermore, this first shaft 1 is connected to an electric motor 7 via a gear 6 that is loosely fitted at the lower part of the first shaft 1. The first clutch device 8 provided on the gear 6 may be either a friction type or a mesh type, but in this embodiment, it is a friction type, and the first clutch device 8 is driven by an electric motor 7 in both forward and reverse rotation directions. A driving friction plate 9 is provided on the gear 6 which is rotatably mounted on the first shaft 1, and a first driven friction plate 10 corresponding to the above is slidable in the axial direction.
Slip key 1 so that it can rotate together with the first axis 1
1 is provided on the first driven disk 11a mounted by the numeral 1. Further, above the first driven disk 11a, a first
A disc spring 12 is disposed through the shaft 1. A first press-contact seat 13 is mounted above the disc spring 12 and is rotatably movable on the first shaft 1 and slidable in the axial direction, and is integrated with the first press-contact seat 13 on its circumference. Rollers 14, 14 are provided in the first pressure contact seat 13 in the diametrical direction, and are slidable in the axial direction, but are fitted with fixed guides 18, 18 to restrict the rotation of the first pressure contact seat 13. It is being Further, a first detachable cam 15 is connected to a gear 16 and rotatably mounted on the first shaft 1 above the first pressure seat 13, and the rollers 14, 14 are connected to the lower surface of the first detachable cam 15. Correspondingly diametrically recessed 1
7, 17 are formed so that the rollers 14, 14 can move in and out of these recesses 17, 17. Therefore, when the first detachable cam 15 is rotated, the rollers 14 move in and out of the recesses 17, 17, and as a result, the first pressure contact seat 13 slides up and down in the axial direction along the first shaft 1. I will do it.
On the other hand, a gear 6' having a second driving friction plate 9' is mounted on a second shaft 1' which is rotatably supported by the frames 2 and 2a parallel to the first shaft 1.
It is rotatably mounted in mesh with a gear 6 having a. Above the second motive friction plate 9', there is a second driven friction plate 10', similar to the first shaft 1 side.
The second clutch device 8' includes a second driven disc 11'a having a second driven disc 11'a, and is slidably inserted in the second shaft 1' in the axial direction by a sliding key 11'. Spring 12' and first shaft 1
Similarly to the side fixed guides 18, 18 (second
(See figure) Rollers 14', 1 whose rotation is regulated
A second pressure contact seat 13' having a diameter 4' and slidable in the axial direction is disposed therethrough. Furthermore, this second pressure contact seat 13'
Above, a gear 16' having concave portions 17', 17' formed in the diametrical direction on its lower surface is rotatably mounted on the second shaft 1', and a second detachable gear 16' having protrusions 19, 19a provided on its upper surface is rotatably mounted on the second shaft 1'. The cam 15' is the first detachable cam 15.
It meshes with the gear 16 and is loosely fitted onto the second shaft 1'. However, the rollers 14', 14' and the recess 17',
17' means 14, 14 and 17, 1 on the first shaft 1 side.
The position is different from 7 by 90 degrees. Reference numeral 20 denotes a stopper disposed on the frame 2, which stops the projections 19 and 1.
When 9a abuts, the rotation of the second detachable cam 15' is stopped. Further, the frame 2 includes a toothed portion 24 at one end of which meshes with a gear 21 fixed to the upper end of the second shaft 1', and a clutch release lever 23 on which a rotating roller 22 is attached to the other end.
is rotatably supported at its center. Further, a fan-shaped cam 25 is fixed to the lower end of the operating shaft 5, and is adapted to come into contact with the rotating roller 22 of the clutch release lever 23. Two protrusions 27, 27 are provided on the upper surface of the operating gear 26, which is fixed to the operating shaft 5 and constitutes a part of the speed reduction mechanism 4.
a is fixed, and near the operating gear 26 there is a stopper 2 with which the protrusions 27, 27a abut.
8 are arranged. Note that 29 and 29' are between the first driving friction plate 9 and the first driven friction plate 10 and between the second driving friction plate 9 and the second driven friction plate 10.
These springs are installed to separate the driving friction plate 9' and the second driven friction plate 10'.

Next, its operation will be explained.

FIG. 1, especially FIG. 3, shows a state when a switch (not shown) that is interlocked with the operating shaft 5 is in a closed state. If the electric motor 7 is now rotated clockwise from this state, the gear 6 and the first driving friction plate 9 meshed with the electric motor 7 will be rotated counterclockwise. As the gear 6 rotates counterclockwise, the second driving friction plate 9' rotates clockwise together with the gear 6' meshing therewith, and the second driven friction plate 10' rotates in the second driving friction plate 10'.
Since it is press-fitted to the driving friction plate 9', the second shaft 1' is integrally rotated clockwise via the sliding key 11'. This rotation is transmitted to the second attachment/detachment cam 15' via the second shaft 1', and when the second attachment/detachment cam 15' rotates 90 degrees clockwise, the second pressure contact seat 1
The rollers 14', 14' of 3' fall into the recesses 17', 17', and at the same time the protrusion 1 of the second detachable cam 15'
9 comes into contact with the stopper 20 and its 90° rotation is stopped. At the same time, due to the fall of the rollers 14', 14', the springs 29' and 12' are expanded, and the second pressing seat 13', the second driven disc 11'a, and the second driven friction plate 10' are moved toward the second shaft 1'. The rotation of the second motive friction plate 9' by sliding upward is no longer transmitted to the second driven friction plate 10'.

On the other hand, the clockwise rotation of the second attachment/detachment cam 15' is transmitted to the first attachment/detachment cam 15 via the gears 16', 16, and the first attachment/detachment cam 15 rotates 90 degrees counterclockwise. The recess 17 of the first detachable cam 15,
Roller 1 of the first pressure contact seat 13 that had fallen into position 17
4 and 14 come out of the recesses 17 and 17. That is, the first press-contact seat 13 is pushed down, and at the same time, the first press-contact seat 13 slides downward on the first shaft 1, and the disc spring 12 is also compressed, so that the first driven friction plate 10
slides downward on the first shaft 1 and the first driving friction plate 9
is pressure welded to the Therefore, the rotation of the electric motor 7 is caused by the gear 6, the first driving friction 9, the first driven friction plate 10, the first driven disk 11a, the first shaft 1 connected to this disk 11a by the slip key 11, and the first shaft 1. It is transmitted to the operating shaft 5 via the upper gear 3 and the reduction mechanism 4,
The operating shaft 5 is rotated counterclockwise to open a switch (not shown) connected to the operating shaft 5. That is, it is operated from the prime mover 7 side.

As the second shaft 1' rotates clockwise, the clutch release lever 23 that engages with the gear 21 of the second shaft 1' rotates counterclockwise, and as the second detachable cam 15' stops. Then it stops rotating.
This state is shown in FIG.

When the electric motor 7 continues to rotate and the operating shaft 5 rotates approximately 185 degrees in the state shown in FIG. comes into contact with the rotating roller 22 of the clutch release lever 23. This state is shown in FIG.

From this state, the electric motor 7 continues to rotate, and the operating shaft 5
further rotates approximately 5 degrees to rotate the clutch release lever 23, and the protrusion 27 of the operating gear 26 comes into contact with the stopper 28, stopping the rotation of the operating shaft 5. At the same time, a limit switch (not shown) starts the electric motor 7. Power is cut off. At this time, the open state of the switch (not shown) is ensured by the dead center mechanism.

As mentioned above, the clutch release lever 23 is attached to the operating shaft 5.
As the cam 25 rotates clockwise, the gear 21 of the second shaft 1' that meshes with the cam 25 rotates counterclockwise, and the second shaft 1' also rotates counterclockwise. Accordingly, the second detachable cam 15' fixed to the second shaft 1' also rotates counterclockwise.
Since the rollers 14', 14' of the second press-contact seat 13' come out of the recesses 17', 17' of the second detachable cam 15', the second press-contact seat 13' slides downward on the second shaft 1'. The spring 21 is compressed, and the second driven friction plate 10' slides downwardly on the second shaft 1' to be press-connected to the second driving friction plate 9'. Although the electric motor 7 is powered off as described above, it is still rotating due to its surplus inertial energy, and the gears 6 and 6' that mesh with the electric motor 7 are also rotating.
Since the second driven friction plate 10' is electrically connected to the second driving friction plate 9' as described above, the rotation of the electric motor 7 is stopped by the braking action.

On the other hand, the rotation of gear 16' is transmitted to gear 16,
Therefore, the first attachment/detachment cam 15 rotates clockwise, and the rollers 14, 14 of the first pressure contact seat 13 fall into the recesses 17, 17 of the first attachment/detachment cam 15. At the same time, the spring 29 and the disc spring 12 are expanded, and the first pressure contact seat 13 and the first driven friction plate 10 slide upward on the first shaft 1, and the pressure contact with the first driving friction plate 9 is released. Rotation due to surplus inertial energy of the electric motor 7 is not transmitted to the first shaft 1. Therefore, since the rotation of the electric motor 7 is not transmitted to the operating shaft 5, the switch (not shown) is maintained in its normal open state.
The opening operation ends. This state is shown in FIG.

In order to perform the closing operation from the fully opened state shown in FIG. 6, the operating shaft 5 side returns to the state shown in FIG. 1 by performing the operation completely opposite to the above-mentioned opening operation, so a description thereof will be omitted.

As specifically explained above in conjunction with the embodiments, according to the present invention, due to the simple structure using a cam and roller, the electric motor side can be connected to the operation shaft at the start of the opening/closing operation, and conversely, the opening/closing operation can be completed. At times, the connection with the electric motor can be stably and reliably disconnected from the operating shaft side.

Furthermore, the power attachment/detachment device according to the present invention operates very smoothly since the clutch is attached/disconnected by interlocking gears without using a complicated lever or link mechanism, and furthermore, the rotation due to the excess inertial energy of the electric motor after the clutch is disengaged is immediately prevented. Since it can be stopped, instantaneous repeated opening and closing operations are possible, which is very effective.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a front sectional view of the main part shown in partial section, Fig. 2 is a view taken in the direction of - arrow in Fig. 1, and Figs. 3 to 6 are This is an explanatory diagram for explaining the operation and shows the sequence from closing the switch to opening the switch. Code, 1 is the first axis, 1' is the second axis, 5 is the operation axis,
7 is an electric motor, 8 is a first clutch device, and 8' is a second clutch device.
Clutch device, 9 is the first driving friction plate, 9' is the second
A driving friction plate, 10 is a first driven friction plate, 10' is a second driven friction plate, 13 is a first pressure contact seat, 13' is a second
A pressure contact seat, 14 and 14' are rollers, 15 is a first attachment/detachment cam, 15' is a second attachment/detachment cam, 17, 17' are recesses, 23 is a clutch release lever, and 25 is a cam.

Claims (1)

[Claims] 1. A first shaft that is provided with a gear that interlocks with the operating shaft via a speed reduction mechanism at one end, and a second shaft that is parallel to the first shaft that is provided with a gear that interlocks with the operating shaft via a cam and a clutch release lever. and the first axis is
A gear that interlocks with the electric motor, and a first driven disk that is locked in the rotational direction via the gear and a first clutch device are elastically provided between the first pressure seat and the first pressure seat, and the first pressure seat has a diameter. A first attachment/detachment cam having a roller whose position is fixed in the direction, a recess into which the roller fits, and a gear interlocking with the first attachment/detachment cam are rotatably fitted into the second axis, and the first axis is attached to the second axis. A gear that meshes with a gear that is interlocked with the electric motor, and a second driven disk that is locked in the rotational direction through a second clutch device that engages and disengages the first clutch in opposite directions are brought into contact by a second pressure. The second press-contact seat has a roller whose position is fixed by being displaced by 90 degrees from the roller in the diametrical direction of the first press-contact seat. An electric operating device for a switch, comprising a second detachable cam having a recess displaced by 90 degrees with respect to the recess position of the first detachable cam, and a gear interlocking with the second detachable cam, each rotatably fitted therein.