KR20130035171A - Operating device for three-position switch - Google Patents

Abstract

PURPOSE: An operating device for a three-position switch is provided to prevent an operation error by using two driving rollers. CONSTITUTION: A circular convex part(7a,7b) is installed to a driving gear(4). A circular concave part(8a,8b,8c) is installed to a geneva gear(8). The circular concave part adjusts the idling speed on the shaft of the driving gear. A roller(6a,6b) is installed to the driving gear. A roller fitting groove is installed to the geneva gear.

Description

Operating device for three-position switch

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manipulator of a switch, and in particular, a three-position switch that combines the functions of a disconnector and a grounding device to switch between three positions of “on”, “off”, and “ground” by one manipulator. It relates to a manipulator.

For example, Patent Document 1 describes that switching between the "on", "off", and "ground" three positions of a disconnecting device with a grounding device is performed by a single operating device by the Geneva mechanism.

7 and 8 are schematic diagrams showing an example of a conventional manipulator using the Geneva mechanism, wherein the output shaft 9 of the Geneva gear 8 is connected to the movable contact 10 via an operating mechanism 9a such as a link mechanism. The movable contact 10 is rotated via the operating mechanism 9a by the rotation of the output shaft 9 of the Geneva gear 8 to contact the fixed contact 11 of the disconnector or the fixed contact 12 of the grounding device. / Is released.

The drive roller 6a and the circular convex part 7a are provided in the side surface of the drive gear 4, The Geneva gear 8 is engaged with the circular convex part 7a of the drive gear 4, and is "on". The circular arc recesses 8a, 8b, 8c holding the " off " and " ground " positions are formed, and the driving roller of the drive gear 4 is rotated by the rotation of the drive gear 4. Driving roller engaging grooves 8d and 8e through which 6a enter and exit are formed, and the driving roller 6a is driven by roller rotation grooves 8d and 8d by the rotation of the driving gear 4. 8e) to rotate the Geneva gear 8.

In the "off" position of FIG. 7, since the circular convex part 7a provided in the drive gear 4 is engaged with the circular concave part 8c of the Geneva gear 8, the output shaft 9 is "off". And the input shaft 5 is in a state capable of idling, and the driving roller 6a provided in the driving gear 4 is engaged with the driving roller engaging groove 8d of the Geneva gear 8. Since it is not, the rotational force of the input shaft 5 of the drive gear 4 is not transmitted to the output shaft 9 of the Geneva gear 8.

7 and 8, when the reduction gear 3 fixed to the operation shaft 2 by the motor or the handwheel in the "off" position is rotated in the clockwise direction, the drive gear meshes with the reduction gear 3. (4) rotates counterclockwise. By this rotation, the driving roller 6a revolves and engages with the driving roller engaging groove 8d of the Geneva gear 8 so that the output shaft 9 rotates clockwise and the driving gear The engagement between the circular arc convex part 7a of (4) and the circular arc recessed part 8c of the Geneva gear 8 is canceled | released. As the Geneva gear 8 rotates in this way, the arc recesses 8a and 8b of the Geneva gear 8 also rotate, and the arc recesses 8a and 8b are arc recesses for maintaining the "off" position. (8c) is provided at the same angle (theta) as the operation angle of the output shaft 9, and the drive roller engaging grooves 8d and 8e have an angle of 1/2 of the operating angle of the output shaft 9 ( Since the " on " operation is completed as shown in Fig. 8, the arc convex portion 7a and the arc concave portion 8a are engaged so that the output shaft 9 is in the " on " position. maintain.

If the input shaft 5 continues to rotate counterclockwise in this "on" position, the circular convex convex portion 7a and the circular concave portion 8a are engaged so that the output shaft 9 is in the "on" position. While being held, the drive gear 4 stops by idling until the drive roller 6a collides with the Geneva gear 8.

In the " on " state of the disconnector, the " off " operation rotates the operation shaft 2 counterclockwise by a motor or by hand to rotate the Geneva gear 8 clockwise. When the grounding device is operated, the operation in the opposite direction to the disconnector operation is performed. Since the actuator has one driving roller and its idle radius is constant, the operating angles of the disconnecting device and the grounding device are the same.

Patent Document 1: Japanese Patent Application Laid-Open No. 3-133018

The above conventional manipulator has the following problems.

(1) Since there is only one driving roller for the drive gear, the idle radius is constant, so the operating angles of the disconnecting device and the grounding device must be the same. Therefore, when the operating angle of the disconnecting device and the operating angle of the grounding device are different, In the manipulator with one roller, it cannot be operated with one.

(2) In case of "off" operation by disconnector, if the motor is stopped after completion of operation, even if there is a coast, the outing is small enough to cause no problem or is enough to cause problems. If it is, the brake can be prevented from overrun to the operating area of the grounding device by applying a brake. However, when the "off" operation is performed manually, there is an opening / closing indication, but there is no stopper for the steering wheel stop.Therefore, there is a fear that the operation should be stopped by the "off" by mistake. have.

(3) At the start of the operation by the Geneva mechanism, the ratio of the operating angle of the output side to the operating angle of the input side becomes exponentially large, and the ratio of the output torque to the input torque inversely decreases therein. The end of the operation is reversed, and the output torque characteristic is U-shaped. For this reason, when the "on" or "ground" operation is performed manually, it is difficult to grasp the operation completion point only by the display and the operation sense installed on the output shaft. Therefore, the driving roller may be operated until it stops due to collision with the Geneva gear. have. At this time, since the operation angle of the driving roller from the completion of the operation to the collision with the Geneva gear is large, unnecessary operation is required, and the operability from the opening / closing display position display to the operation stop becomes large, so the operability is not good.

Accordingly, the present invention provides a manipulator of a three-position switchgear capable of reliably switching three positions of "on", "off", and "ground" with one manipulator when the operation angles of the disconnecting device and the grounding device are different. .

The invention of claim 1 includes a Geneva gear for switching three positions of "on", "off", and "ground" of the three-position switchgear provided with the disconnecting device and the grounding device, and a drive gear for driving the Geneva gear. The drive gear has a pair of circular convex portions and a pair of driving rollers on its side, and the Geneva gear is engaged with the circular convex portions to maintain the " on ", " off " and " ground " Three circular arc recesses for idling the other circumference of the cylinder, and a pair of driving roller engaging grooves engaged with the driving rollers to transfer rotational force to the output shaft of the Geneva gear between the circular arc recesses; Two circular recesses each having an angle between " off " and " on " and " off " to " ground " The roller engagement groove for the movement arranges the angle between "off" at 1/2 of the operation angle of the said output shaft, respectively, and the said drive roller has one drive roller in the "off" position. A positioner engaged with one roller engagement groove on the same side, and the other driving roller are disposed at positions engaged with the other roller engagement groove on the same side, respectively.

According to the invention of claim 2, the switching rod for switching the mode of " manual disconnector manual operation ", " electric operation " or " grounding device manual operation " is slidably and axially in an arc-shaped slit formed on a fixed plate fixed to the manipulator. It is held so as to be movable forward and backward, and the switching rod is integrally formed with a stopper provided with a stopper pin, and the width of the slit is wider than the outer diameter of the switching rod in the " off " position, and in other positions than the outer diameter of the switching rod. Although it is narrow, it is wider than the narrow diameter part, and the said stopper position can be switched in the "off" position, but in other positions, the narrow diameter of the stopper switch bar is slidable but the mode cannot be switched. The stopper pin engages the roller for driving one side of the Geneva gear during the manual operation of the disconnector. To the stopper pin which is moved into the groove and engaged by moving into the other driving roller engagement groove of the Geneva gear during manual operation of the grounding device, and moved to the driving roller engagement groove in each manual operation. It is formed on the stopper so that the driving roller does not touch and overrun at the " off ", and is positioned at an intermediate position between the pair of driving roller engaging grooves which do not act on the driving roller during the electric operation. It is an operating device of the 3-position switchgear of Claim 1 characterized by the above-mentioned.

In the invention of claim 3, a slider is provided on the fixed plate so as to be slidable, and a shutter is provided to open and close a manual handle insertion hole for inserting a manual handle for rotating the operation shaft of the drive gear from the outside, wherein the shutter and the slider are provided. In the "electric operation" mode, the slider touches the stopper so that the shutter cannot be opened, and in the manual operation mode, the slider does not touch the stopper to open the shutter and open the manual handle insertion hole. It is an operating device of the 3-position switchgear of Claim 2 characterized by the above-mentioned.

In order to minimize the size of the SF ₆ gas-sealed switchgear, the operation angle of the disconnecting device and the operation angle of the grounding device may be different depending on the arrangement of the storage device and the performance of the device. On the other hand, for example, a gear manipulator is relatively easy to cope with a 3-position switchgear with a different operating angle, but since the operating angle is changed by a change in operating voltage, extra strokes are required to secure contact reliability and insulation performance. You need to take it long. Since the Geneva manipulator of the present invention can operate a three-position switchgear at a different operation angle with one, and there is no change in the opening and closing angle even when the operating voltage is changed, the operation is assured and there is no need to consider an extra stroke. It is possible to provide a reliable, small and inexpensive 3-position switchgear with high operation reliability.

In the manipulator of the present invention, the stopper is set to the "off" position during manual operation, so that the operation stop position can be clearly determined during the "on"-"off" operation of the disconnecting device and the "off"-"ground" operation of the grounding device. Therefore, the misoperation of the overrun can be prevented during the "off" operation. In addition, the setting position of the stopper can be detected with a limit switch to distinguish between disconnector operation and grounding device operation.

By arranging two driving rollers, the manipulator of the present invention reduces unnecessary operation angles from the completion of operation to the operation stop during "on" operation or "ground" operation by manual operation. Operation misalignment is also reduced.

The manipulator of the present invention is provided with a shutter mechanism on the manual operation shaft and is associated with the stopper so that (1) manual operation is impossible at the time of the electric operation. (2) Electric operation is impossible during manual operation. (3) The stopper cannot be switched unless it is in the "off" position. (4) During manual operation, safety measures such as switching of the stopper are impossible unless the handle is pulled out once in "off".

1: (a) is a side view of the Example of this invention, (b) is a front view.
FIG. 2 is a view showing an "on" state of the disconnector of FIG.
3: (a) is a side view of Example 2 (electric motion) of this invention, (b) is a front view.
4: (a) is a side view of Example 2 (manual operation) of this invention, (b) is a front view.
FIG. 5: (a) is a side view of Example 3 (electric motion) of this invention, (b) is a front view.
FIG. 6: (a) is a side view of Example 3 (manual operation) of this invention, (b) is a front view.
Fig. 7 is a diagram showing an “off” position in the embodiment according to the conventional patent technique.
FIG. 8 is a view showing completion time of "on" operation of the disconnector of FIG.

An embodiment of the present invention will be described with reference to the drawings.

≪ Example 1 >

In FIG. 1, the drive gear 4 fixed to the input shaft 5 is engaged with the reduction gear 3 fixed to the operating shaft 2 rotated by a motor or a handwheel, and the rotation of the operating shaft 2 is engaged. As a result, the drive gear 4 is rotated via the reduction gear 3 so that the Geneva gear 8 is driven.

The output shaft 9 of the Geneva gear 8 is connected to the movable contact via the operation mechanism similarly to the conventional example shown in Figs. The movable contactor is rotated by the operation mechanism by the rotation of the output shaft 9 of the Geneva gear 8 to contact / detach the fixed contactor of the disconnector or the fixed contactor of the grounding device to operate "on" and "off".

On the side surface of the drive gear 4, a pair of drive rollers 6a, 6b are provided on the left and right, and a pair of circular arc convex portions 7a, 7b are provided on the upper and lower sides. At the periphery of the Geneva gear 8, circular recesses 8a, 8b, 8c are provided at portions corresponding to the respective positions of the "on", "off", and "ground" positions of the switchgear at intervals. And a pair of driving roller engaging grooves 8d and 8e are provided at left and right sides at intervals.

By the rotation of the drive gear 4, the driving rollers 6a and 6b enter the driving roller engaging grooves 8d and 8e of the Geneva gear 8 and are engaged to engage the Geneva gear 8. Rotate In addition, by the rotation of the drive gear 4 and the rotation of the Geneva gear 8, the circular convex portions 7a, 7b of the drive gear 4 are circular arc recesses 8a, 8b of the Geneva gear 8; ) And (8c) to hold the "on", "off", and "ground" positions, respectively.

The arcuate recesses 8a, 8b, 8c of the Geneva gear 8 operate the output shaft 9 at angles between "off" and "on" and between "off" and "ground". It arrange | positions in the same angle (alpha), (beta), and maintains the "on", "off", "ground" position of the output shaft 9 after completion | finish of operation, and maintains the rudder of the drive gear 4 so that idling is possible.

The angles of the driving roller engaging grooves 8d and 8e of the Geneva gear 8 are circular arc recesses 8a of the "on" and circular arcs of the "ground" in the circular arc recesses 8c of the "off". Each of the recesses 8b was disposed at 1/2 of the operating angles α and β, that is, at angles α / 2 and β / 2, respectively. The revolving radius of the driving rollers 6a and 6b is R1 and the driving roller 6b is such that the driving roller 6a is engaged with each of the driving roller engaging grooves 8d and 8e. It is arrange | positioned so that R2 may correspond to the different operation angle of a disconnector and a grounding device.

FIG. 1 shows the "off" position among the three positions, and when the drive gear 4 is rotated in the direction of the arrow (counterclockwise), the "on" operation of the disconnector is performed, and FIG. 2 shows the "on" position of the disconnector. Then, the driving roller 6a revolves in the counterclockwise direction by the rotation of the driving gear 4 from the "off" position shown in FIG. 1, and the driving roller engaging groove 8d of the Geneva gear 8 is rotated. Engage with and rotate the output shaft 9 clockwise. As the Geneva gear 8 rotates, the arc convex portion 7b and the arc concave portion 8a are engaged with each other to turn on, and the motor 1 is stopped to complete the operation.

In FIG. 2, the circular convex portion 7b and the circular concave portion 8a are engaged. When the driving roller 6a is further revolved clockwise during manual operation, the input side is driven by the driving roller 6b. It is shown by the dotted line that the engine can be idle until it hits the Geneva gear 8. In addition, when the driving roller 6a is rotated clockwise from the state of FIG. 2, it returns to the state of FIG. 1 and completes the "off" operation of a disconnecting device.

The state shown in FIG. 1 is a disconnector "off" and a grounding device "off". In this state, if the driving roller 6b is further idled clockwise, the operation becomes "ground", and the output shaft 9 of the Geneva gear 8 rotates the operating angle β in the counterclockwise direction, and the circular convex portion 7b is rotated. ) And the circular arc recess 8b are engaged and held at the "ground" position to complete the grounding operation. When the driving roller 6b revolves clockwise, the driving roller 6a collides with the Geneva gear 8 and the operation is stopped.

<Example 2>

Fig. 3 shows a state in which the stopper is set to the electric operation and the disconnector is electrically operated &quot; off &quot;, and Fig. 4 shows a state in which the stopper is set to the disconnector manual operation and the disconnector is manually &quot; off &quot;

3 and 4, the slit 25a is formed in an arc shape around the output shaft 9 on the fixed plate 25 fixed to the manipulator, and the switching rod 23 is slidable in the slit 25a. It is arranged. In the "off" state shown, the width of the slit 25a is formed wider than the outer diameter of the switching rod 23 so that the switching rod 23 can be slid in the slit 25a. It is possible to switch freely in any of the three modes of "electric operation" and "grounding device manual operation".

The switching rod 23 is integrally formed with the stopper 21 having the stopper pin 22, and the stopper 21 is provided between the fixed plate 25 and the Geneva gear 8 so as to be rotatable about the output shaft 9. Is placed. The switching rod 23 is slid in the slit 25a while being pulled out in the axial direction against the spring 24 to switch to a required mode among "manual disconnector operation", "motor operation" and "grounding device manual operation". The pulled out bar 23 can be returned to the axial direction and held and set by the spring 24. In this state, when the "on", "off", and "ground" operations are performed, the stopper 21 is pushed to the Geneva gear 8 by the spring 24 so that the stopper 21 is integrated with the Geneva gear 8 to operate. .

In any of the three modes, the width of the slit 25a is wider than the outer diameter of the switch bar 23 in the "off" position, but the width of the slit 25a is larger than the outer diameter of the switch bar 23 in the "off" position. Since it was narrowed down, since the switching rod 23 cannot be pulled out in an axial direction, a mode cannot be switched.

In the case of the &quot; electric operation &quot; mode shown in FIG. 3, the narrow diameter portion 23a of the switching rod 23 is at the same position as the fixed plate 25, and the &quot; disconnector manual operation &quot; In the "operation" mode, the narrow diameter portion 23b of the switching rod 23 is at the same position as the fixed plate 25. In addition, the opening angle of the slit 25a is an angle at which the narrow diameter portions 23a and 23b of the switching rod 23 do not touch the ends of the slit 25a even in the "on" operation or the "grounding" operation in any mode. Since the "on" and "ground" operations can be performed without a problem. In the transmission operation mode shown in Fig. 3, the driving rollers 6a and 6b do not work with the stopper pin 22, so that operation in three positions is possible by transmission.

As shown in Fig. 4, when the stopper pin 22 is set in the driving roller engaging groove 8e by the switching rod 23 in the &quot; off &quot; 6a can be engaged with one driving roller engaging groove 8d on the same side, while the other driving roller 6b is provided with a stopper pin (8) in the other driving roller engaging groove 8e on the same side. 22) can not rotate anymore. Therefore, since the driving roller 6a can be manually engaged with the driving roller engaging groove 8d, the disconnecting unit can be operated in an "on" or "off" operation, and in the case of an "off" operation, the driving roller ( Since 6b) is in the driving roller engaging groove 8e, the stopper pin 22 cannot be rotated in contact with the stopper pin 22, so there is no fear of accidentally passing the "off" to the "ground". At this time, the stopper 21 is pushed into the Geneva gear 8 side, and the narrow diameter portion 23b of the switching rod 23 is at the position of the fixed plate 25. The width of the slit 25a of the fixed plate 25 is wider than the switching bar 23 in the &quot; off &quot; position and narrower than the outer diameter of the switching bar 23 in other positions, but the narrow diameter portion 23d of the switching bar (( Since it is wider than 23b), the stopper 21 can be switched in the &quot; off &quot; position, but in the other positions, the narrower portions 23d and 23b of the switching rod are slidable but cannot be switched. The operation of the grounding device is the same as that of the disconnector.

<Example 3>

5 and 6, a case (not shown) of the manipulator is provided with a manual handle insertion hole 2a, and a slider 26 is provided on the fixing plate 25 fixed to the manipulator so as to be slidable up and down. The manual handle insertion hole 2a is provided in the case of the manipulator, and the slider 26 is connected to the shutter 27 which opens and closes the manual handle insertion hole 2a which passes the manual handle from the outside of the manipulator into the manipulator. The manual handle is connected to a mechanism for rotating the operating shaft 2 (see FIG. 1) in the manipulator. The shutter 27 is rotated when the manual operation condition is satisfied by the control means (not shown), thereby opening the manual handle insertion hole 2a and allowing the slider 26 to descend.

In FIG. 5, since the stopper 21 and the stopper pin 22 are pulled forward in the "electric operation" mode, the slider 26 touches the stopper 21 and the shutter 27 cannot be opened. The stopper 21 is arcuate, and since the slider touches both the "on", "off" and "ground" positions, the manual handle insertion hole 2a is closed, so the manual handle cannot be passed through the manual handle insertion hole 2a. Operation is impossible. In this state, the limit switch 28 indicating "shutter open" of the shutter 27 does not operate and the stopper 21 is pulled forward, so the limit for displaying "switch disconnector manual operation" or "grounding device manual operation" is shown. The switches 29a and 29b also do not operate.

In Fig. 6, since the stopper 21 and the stopper pin 22 are set to the position of the "switch disconnector manual operation" mode in which the stopper 21 and the stopper pin 22 are pushed in, the slider 26 slides freely without touching the stopper 21, so that the shutter ( Since the 27) can be opened, the operating shaft 2 can be manually operated by passing the manual handle through the manual handle insertion hole 2a. In this state, the limit switch 28 operates, emits a signal, and continues the signal of "shutter open" until the handle is pulled out.

The stopper 21 also operates the limit switch 29a to issue a disconnector operation signal. This signal continues at any position from "off" to "on" until the operation mode is switched differently. The limit switch 29b operates and emits a signal when it enters the "grounding device manual operation" mode which does not operate at any position during the "breaker manual operation" mode. In this way, the setting position of the stopper can be detected by the limit switch, thereby making it possible to distinguish between disconnector operation and grounding device operation.

In addition, since the slider 26 prevents the axial movement of the stopper 21 during manual handle insertion, neither the electric drive nor the grounding device manual operation can be changed unless the handle is pulled out once in the "off" position.

1: motor
2: control shaft
2a: manual handle insertion hole
3: reduction gear
4: drive gear
5: input shaft
6a, b: driving roller
7a, b: circular convex portion
8: geneva gear
8a to c: circular recess
8d, e: driving roller engaging groove
9: output shaft
9a: operating mechanism
10: operation contactor
11: disconnector fixed contact
12: Grounding device fixed contact
21: Stopper
22: stopper pin
23: switching rod
23a, b: the neck of the conversion rod
24: spring
25: fixed plate
25a: slit of fixing plate
26: slider
27: shutter
28: limit switch
29a, b: limit switch

Claims (3)

It is provided with the Geneva gear which switches three positions of "On", "Off", and "Ground" of a 3-position switchgear provided with a disconnecting device and a grounding device, and the drive gear which drives Geneva gear,
The drive gear has a pair of circular arc convex portions and a pair of driving rollers on a side surface,
The said Geneva gear engages with the said circular convex part, and maintains the "on", "off", and "ground" positions, and the three circular concave parts which idlely rotate the circumference of the said drive gear, and these circular concave parts, A pair of driving roller engaging grooves engaged with the driving rollers for transmitting rotational force to the output shaft of the Geneva gear,
The three circular arc recesses each have an angle between "off" and "on" and between "off" and "ground" in the same manner as the operating angle of the output shaft,
The pair of driving roller engaging grooves are arranged such that the angle between &quot; off &quot; is 1/2 of the operating angle of the respective output shafts,
The pair of driving rollers have a position where one driving roller is engaged with one roller engaging groove on the same side and the other driving roller is engaged with the other roller on the same side in the "off" position. Manipulators of three-position switchgear, characterized in that arranged in each position to be engaged with the groove. The method of claim 1,
In the arc-shaped slit formed on the fixed plate fixed to the manipulator, a switching rod for mode switching of "switch disconnector manual operation", "electric operation" or "grounding device manual operation" is held slidably and forward and backward in the axial direction. ,
The conversion rod is formed integrally with the stopper is installed stopper pin,
The width of the slit is wider than the outer diameter of the switch bar in the &quot; off &quot; position, and is narrower than the outer diameter of the switch bar in other positions, but wider than the narrow diameter part, so that the stopper can be switched in the &quot; off &quot; position. It is possible, but in other positions, the narrow diameter of the stopper switch bar is formed to be slidable but the mode cannot be switched,
The stopper pin moves into the one driving roller engagement groove of the Geneva gear during manual operation of the disconnector, and moves into the other driving roller engagement groove of the Geneva gear during manual operation of the grounding device. The driving roller is engaged with the stopper pin moved to the driving roller engaging groove during each manual operation so that the driving roller is not overrun from "off", and does not act on the driving roller during the electric operation. And a stopper formed on the stopper so as to be positioned at an intermediate position between the pair of driving roller engaging grooves. The method of claim 2,
Sliders are installed on the fixed plate to be slidable,
A shutter is provided for opening and closing the manual handle insertion hole for inserting the manual handle for rotating the operation shaft of the drive gear from the outside,
The shutter and the slider may not open the shutter because the slider touches the stopper in the "electric operation" mode, and the slider does not touch the stopper in the manual operation mode to open the shutter and open the manual handle insertion hole. Manipulator of a three-position switchgear characterized in that the arrangement.

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