JP2013077394A - Three-step switch manipulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manipulate a three-step switch in which operating angles of "on/off" of a disconnector and "off/grounding" of an installation device are different, with one manipulator.SOLUTION: After the completion of operation in a Geneva mechanism, "on", "off", and "grounding" positions of an output shaft 9 are held while being engaged with arcuate projections 7a and 7b provided in a drive gear 4, and arcuate recesses 8a, 8b, and 8c provided in a Geneva gear 8 for idling the coast of the drive gear 4 are disposed such that angles from "off" to "on" and from "off" to "grounding" are made approximately equal with operating angles α and β of the output shaft 9. Furthermore, roller engage grooves 8d and 8e provided in the Geneva gear 8 for transmitting a rotational force to the output shaft 9 while being engaged with rollers 6a and 6b provided in the drive gear 4 are disposed such that angles of the roller engage grooves 8d and 8e become 1/2 the operating angles from "off" to "in" and "grounding" of the arcuate recess 8c. In such a case, regarding the rollers 6a and 6b provided in the drive gear 4, the roller 6a is disposed at a position of a revolution radius R1 to be engaged with the roller engage groove 8d and the roller 6b is disposed at a position of a revolution radius R2 to be engaged with the roller engage groove 8e, respectively.

Description

  The present invention relates to an operating device for a switch, and in particular, has a function of a disconnecting switch and a grounding device, and switches between three positions of “ON”, “OFF”, and “GROUNDING” with one operating device. About.

  For example, Patent Document 1 discloses that the switching between three positions of the disconnecting switch with a grounding device, that is, “on”, “off”, and “grounding” is performed by a Geneva mechanism with one operating device.

  7 and 8 are schematic views showing an example of a conventional operation device using a Geneva mechanism. An output shaft 9 of the Geneva gear 8 is connected to a movable contact 10 via an operation mechanism 9a such as a link mechanism. The movable contact 10 is rotated via the operation mechanism 9a by the rotation of the output shaft 9 of the Geneva gear 8 and is brought into contact with and separated from the fixed contact 11 of the disconnector or the fixed contact 12 of the grounding device.

  A driving roller 6a and an arc convex portion 7a are provided on the side surface of the driving gear 4, and the Geneva gear 8 is engaged with the arc convex portion 7a of the driving gear 4 to be in the “on”, “off”, and “ground” positions. Arc recesses 8a, 8b and 8c are formed, and driving roller engaging grooves 8d and 8e through which the driving roller 6a of the driving gear 4 enters and exits by rotation of the driving gear 4 are formed. , The driving roller 6a engages with the driving roller engaging grooves 8d and 8e to rotate the Geneva gear 8.

  In the “cut” position of FIG. 7, since the arc convex portion 7 a provided on the drive gear 4 is engaged with the arc concave portion 8 c of the Geneva gear 8, the output shaft 9 is held at the “cut” position and the input shaft 5 is Since the drive roller 6a provided in the drive gear 4 is in an idle-rotating state and is not engaged with the drive roller engaging groove 8d of the Geneva gear 8, the rotational force of the input shaft 5 of the drive gear 4 is generated by the Geneva. It is not transmitted to the output shaft 9 of the gear 8.

  7 and 8, when the reduction gear 3 fixed to the operating shaft 2 is rotated clockwise from the “off” position by a motor or a manual handle, the drive gear 4 meshing with the reduction gear 3 is counterclockwise. Rotate. By this rotation, the driving roller 6a revolves and engages with the driving roller engaging groove 8d of the Geneva gear 8 to rotate the output shaft 9 in the clockwise direction, and the arc convex portion 7a of the driving gear 4 and the Geneva The engagement of the circular arc recess 8c of the gear 8 is released. When the Geneva gear 8 rotates in this manner, the arc recesses 8a and 8b of the Geneva gear 8 also rotate. However, the arc recesses 8a and 8b have the same angle as the operating angle of the output shaft 9 from the arc recess 8c for holding the “cut” position. Since the driving roller engaging grooves 8d and 8e are provided at an angle θ / 2 that is ½ of the operating angle of the output shaft 9, as shown in FIG. After completion, the arc convex portion 7a and the arc concave portion 8a are engaged, and the output shaft 9 is held at the “ON” position.

  When the input shaft 5 continues to rotate counterclockwise in this "on" position, the output shaft 9 is held at the "on" position because the arc convex portion 7a and the arc concave portion 8a are engaged. However, the driving gear 4 idles and stops until the driving roller 6a collides with the Geneva gear 8.

  When the disconnector is switched from the “ON” state to the “OFF” operation, the operation shaft 2 is rotated counterclockwise by a motor or manually, and the Geneva gear 8 is rotated clockwise. When the grounding device is operated, the operation is performed in the reverse direction of the operation of the disconnector. Since this actuator has one driving roller and its revolution radius is constant, the operating angle of the disconnector and the grounding device are the same.

JP-A-3-133018

The conventional operating device has the following problems.
(1) Since the revolution radius is constant because there is only one driving gear driving roller, the operating angle of the disconnecting device and the grounding device must be the same. When the operating angles are different, a single drive roller cannot be operated with a single controller.

(2) When the disconnector is operated to “turn off” by electric operation, if the motor is stopped after the operation is completed, even if there is a coasting, the coasting is so small that the coasting is not a problem, or the coasting is problematic. Then, it is possible to prevent overrunning to the operation area of the grounding device by applying a brake. However, in the case of manually performing the “off” operation, although there is an open / close indication, there is no stopper for the stop of the steering wheel, so there is a risk that the place to be stopped by “off” may erroneously overrun to the operation area of the grounding device. Therefore, there is a possibility that reliable operation cannot be performed.

(3) At the beginning of the operation by the Geneva mechanism, the ratio of the output-side operating angle to the input-side operating angle increases geometrically, and the ratio of the output torque to the input torque decreases in inverse proportion thereto. The end of the operation is reversed, and the output torque characteristic is U-shaped. For this reason, if you manually perform an “on” or “ground” operation, it is difficult to grasp the point of completion of operation only by the indication and operation feeling provided on the output shaft, so until the driving roller collides with the Geneva gear and stops May be manipulated. 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, it is necessary to perform a useless operation, and the deviation of the operation from the position display of the open / close display to the operation stop increases. The operability is not good.

  Therefore, the present invention provides three positions where switching between the three positions of “On”, “Off”, and “Grounding” can be reliably performed with a single controller when the operating angle of the disconnector and the grounding device are different. A switch operating device is provided.

  The invention of claim 1 of the present application comprises a Geneva gear that switches between three positions of “On”, “Off”, and “Ground” of a three-position switch equipped with a disconnector and a grounding device, and a drive gear that drives the Geneva gear, The drive gear has a pair of arc convex portions and a pair of driving rollers on the side surfaces, and the Geneva gear engages with the arc convex portions to maintain the “on”, “cut”, and “ground” positions. And a pair of drives for transmitting the rotational force to the output shaft of the Geneva gear by engaging the driving roller between the arc recesses to idle the coast of the drive gear. The three circular arc recesses are arranged so that the angles between “cut” and “enter” and “cut” and “ground” are the same as the operating angle of the output shaft. The pair of driving roller engaging grooves each provide an angle between “cut” and the above. The driving roller is disposed at a half of the operating angle of the shaft, and the pair of driving rollers has a position where one driving roller engages with one roller engaging groove on the same side in a state of “cut” position; An operating device for a three-position switch, wherein the other driving roller is disposed at a position where the other driving roller engages with the other roller engaging groove on the same side.

  The invention of claim 2 of the present application is for switching the mode of “disconnector manual operation”, “electric operation” or “grounding device manual operation” in an arc-shaped slit formed in a fixed plate fixed to the operation device. The switching rod is slidably held so as to be capable of moving back and forth in the axial direction, the switching rod is formed integrally with a stopper provided with a stopper pin, and the outer diameter of the switching rod when the slit width is in the “cut” position. It is wider and is narrower than the outer diameter of the switching rod at other positions, but wider than the narrow diameter portion, so that the stopper position can be switched at the “cut” position. The stopper pin moves into the one driving roller engagement groove of the Geneva gear when the disconnector is manually operated. When the grounding device is manually operated, the drive roller engages with the other driving roller engaging groove of the Geneva gear, and the driving roller is placed on the stopper pin that has moved to the driving roller engaging groove during each manual operation. The stopper is formed so as to be positioned at an intermediate position between the pair of driving roller engaging grooves that do not act on the driving roller during electric operation without causing overrun from hitting. The three-position switch operating device according to claim 1.

  According to a third aspect of the present invention, a slider is provided on the fixed plate so as to be slidable, and a shutter for opening and closing a manual handle insertion hole for inserting a manual handle for rotating the operation shaft of the drive gear from the outside is provided. In the “electric operation” mode, the slider cannot open the shutter because the slider hits the stopper, and in the manual operation mode, the slider can be opened and the manual handle insertion hole can be opened without hitting the stopper. The three-position switch operating device according to claim 2, which is arranged as described above.

In order to reduce the size as much as possible, like the SF ₆ gas-filled switch, the operating angle of the disconnector and the operating angle of the grounding device may differ depending on the arrangement of the storage equipment and the equipment performance. On the other hand, for example, it is relatively easy to handle a three-position switch with different operating angles with a single gear-type operating device, but the operating angle varies due to fluctuations in operating voltage, ensuring contact reliability and insulation performance. Therefore, it is necessary to keep an extra long stroke. The Geneva type operating device of the present invention can operate a three-position switch with different operating angles by one unit, and even if the operating voltage fluctuates, there is no fluctuation in the opening and closing angle, so the operation is reliable and extra strokes are taken into account. Therefore, it is possible to provide a three-position switch with high operation reliability, small size, and low cost.

  The controller of the present invention sets a stopper at the “OFF” position at the time of manual operation, so that it is clear both at the time of “ON”-“OFF” operation of the disconnector and at the time of “OFF”-“ground” operation of the grounding device. Since the operation stop position is possible, it is possible to prevent erroneous operation of overrun at the time of “OFF” operation. In addition, the setting position of the stopper can be detected by a limit switch to distinguish between disconnector operation and grounding device operation.

  The operation device of the present invention has two drive rollers, which reduces the useless operation angle from operation completion to operation stop during manual "on" operation or "grounding" operation. The difference between the position display and the operation stop is also reduced.

  In the operating device of the present invention, a manual operation shaft is provided with a shutter mechanism and linked with the stopper in the previous period. (2) Electric operation is not possible during manual operation. (3) The stopper cannot be switched unless it is in the “OFF” position. (4) At the time of manual operation, it is possible to take safety measures such as the stopper cannot be switched unless the handle is pulled out once with “OFF”.

(A) is a side view of the Example of this invention, (b) is a front view. It is a figure which shows the "on" state of the disconnector of FIG. (A) is a side view of Example 2 (electric operation) of this invention, (b) is a front view. (A) is Example 2 (manual operation) side view of this invention, (b) is a front view. (A) is a side view of Example 3 (electric operation) of this invention, (b) is a front view. (A) is a side view of Example 3 (manual operation) of the present invention, and (b) is a front view. It is a figure which shows a "cut" position in the Example by the conventional patent technology. It is a figure which shows the time of "ON" operation completion of the disconnector of FIG.

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

  In FIG. 1, a drive gear 4 fixed to an input shaft 5 meshes with a reduction gear 3 fixed to an operation shaft 2 that is rotated by a motor or a manual handle, and the drive gear 4 is rotated via the reduction gear 3 by rotation of the operation shaft 2. Is rotated so that the Geneva gear 8 is driven.

  The output shaft 9 of the Geneva gear 8 is connected to a movable contact through an operation mechanism, as in the conventional example shown in FIGS. The movable contact is rotated by the operating mechanism by the rotation of the output shaft 9 of the Geneva gear 8 and is moved into and out of the fixed contact of the disconnector or the fixed contact of the grounding device.

  On the side surface of the drive gear 4, a pair of driving rollers 6 a and 6 b are provided on the left and right sides, and a pair of arc convex portions 7 a and 7 b are provided on the top and bottom. On the periphery of the Geneva gear 8, arc recesses 8a, 8b, and 8c are provided at portions corresponding to the positions of “ON”, “OFF”, and “GROUND” of the switch at intervals. A pair of driving roller engaging grooves 8d and 8e are provided on the left and right.

  As the driving gear 4 rotates, the driving rollers 6 a and 6 b enter and engage with the driving roller engaging grooves 8 d and 8 e of the Geneva gear 8 to rotate the Geneva gear 8. Further, the rotation of the drive gear 4 and the rotation of the Geneva gear 8 cause the arc convex portions 7a, 7b of the drive gear 4 to engage with the arc concave portions 8a, 8b, 8c of the Geneva gear 8, respectively. , Hold the “ground” position.

  The arc recesses 8a, 8b and 8c of the Geneva gear 8 are arranged so that the angles between “off” and “on” and “off” and “ground” are the same as the operating angles α and β of the output shaft 9. Then, after the operation is completed, the “on”, “off”, and “grounding” positions of the output shaft 9 are held, and the coasting of the drive gear 4 is held idle.

  The angle of the driving roller engaging grooves 8d and 8e of the Geneva gear 8 is one of the operating angles α, β of the “cut” arc recess 8c to the “enter” arc recess 8a and the “ground” arc recess 8b. / 2, that is, they are arranged at angles of α / 2 and β / 2, respectively. The revolving radii of the driving rollers 6a and 6b are arranged so that the driving roller 6a is R1 and the driving roller 6b is R2 so as to engage with the driving roller engaging grooves 8d and 8e, respectively. Correspond to the different operating angles of the device and the grounding device.

  FIG. 1 shows the “off” position among the three positions. When the drive gear 4 rotates in the direction of the arrow (counterclockwise), the disconnect switch “on” operation is performed, and FIG. 2 shows the disconnect switch “on” position. 1, the driving roller 6 a revolves counterclockwise by the rotation of the driving gear 4 from the “cut” position shown in FIG. 1 and engages with the driving roller engaging groove 8 d of the Geneva gear 8 to rotate the output shaft 9 clockwise. Rotate in the direction. When the Geneva gear 8 rotates by the operating angle α, the arc convex portion 7b and the arc concave portion 8a are engaged to be “ON”, and the motor 1 is stopped to complete the operation.

  In FIG. 2, the arc convex portion 7 b and the arc concave portion 8 a are engaged. However, when the driving roller 6 a further revolves clockwise during manual operation, the driving roller 6 b is connected to the Geneva gear 8 on the input side. The dotted line indicates that it can run idle until it collides. When the driving roller 6a is rotated clockwise from the state of FIG. 2, the state returns to the state of FIG.

  The state shown in FIG. 1 is the disconnector “OFF” as well as the grounding device “OFF”. In this state, when the driving roller 6b is revolved clockwise, a “grounding” operation is performed, and the output shaft 9 of the Geneva gear 8 rotates counterclockwise by an operating angle β to engage the arc convex portion 7b and the arc concave portion 8b. Then, it is held at the “grounding” position, and the grounding operation is completed. When the driving roller 6b revolves clockwise, the driving roller 6a collides with the Geneva gear 8 and the operation stops.

  3 shows a state where the stopper is set to the electric operation and the disconnector is electrically operated and the “off” operation is completed. FIG. 4 is a state where the stopper is set to the disconnector manual operation and the disconnector is manually set to the “off” operation. Indicates the state.

  3 and 4, a slit 25a is formed in an arc shape around the output shaft 9 in the fixed plate 25 fixed to the operating device, and the switching rod 23 is slidably disposed in the slit 25a. In order to make the switching rod 23 slidable in the slit 25a in the illustrated “cut” state, the width of the slit 25a is formed wider than the outer diameter of the switching rod 23, and the “disconnector manual operation”, “ It is possible to freely switch to any of the three modes of “electric operation” and “grounding device manual operation”.

  The switching rod 23 is formed integrally with a stopper 21 having a stopper pin 22, and the stopper 21 is disposed between the fixed plate 25 and the Geneva gear 8 so as to be rotatable about the output shaft 9. The switching rod 23 is pulled in the axial direction against the spring 24 and is slid in the slit 25a so that the necessary mode of "disconnector manual operation", "electric operation", and "grounding device manual operation" is selected. After switching to, the pulled switching rod 23 can be returned to the axial direction and held and set by the spring 24. When “ON”, “OFF”, and “Grounding” operations are performed in this state, the stopper 21 is pressed against the Geneva gear 8 by the spring 24 and thus operates integrally with the Geneva gear 8.

  In any of the three modes, the width of the slit 25a is wider than the outer diameter of the switching bar 23 at the “cut” position, but the width of the slit 25a is smaller than the outer diameter of the switching bar 23 at other positions than the “cut” position. Therefore, since the switching rod 23 cannot be pulled in the axial direction, the mode cannot be switched.

  In the case of the “electric operation” mode shown in FIG. 3, the small-diameter portion 23a of the switching rod 23 is located at the same position as the fixed plate 25, and “disconnector manual operation” and “grounding device manual operation” shown in FIG. In the mode, the small diameter portion 23 b 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 set such that the small diameter portions 23a and 23b of the switching rod 23 do not hit the end of the slit 25a regardless of the “on” operation or the “grounding” operation in any mode. Therefore, “on” and “grounding” operations can be performed without any trouble. In the case of the electric operation mode shown in FIG. 3, the driving rollers 6 a and 6 b do not act on the stopper pin 22, and can be operated in three positions by electric operation.

  As shown in FIG. 4, when the stopper pin 22 is set in the driving roller engaging groove 8e by the switching rod 23 at the "OFF" position in the "disconnector manual operation" mode, one of the driving rollers 6a is on the same side. Although it can be engaged with one driving roller engaging groove 8d, the other driving roller 6b cannot be rotated any more because it contacts the stopper pin 22 in the other driving roller engaging groove 8e on the same side. Therefore, in the disconnector, since the driving roller 6a can be manually engaged with the driving roller engaging groove 8d, the "ON" and "OFF" operations can be performed. In the case of the "OFF" operation, the driving roller 6b Is in the driving roller engaging groove 8e and cannot be rotated by hitting the stopper pin 22, so that there is no possibility of accidentally passing the “cut” to the “grounding”. At this time, the stopper 21 is pushed into the back of the Geneva gear 8, and the small diameter portion 23 b of the switching rod 23 is at the position of the fixed plate 25. The width of the slit 25a of the fixing plate 25 is wider than the switching rod 23 at the “cut” position, and is narrower than the outer diameter of the switching rod 23 at other positions, but wider than 23a and 23b. Although the stopper 21 can be switched, the small-diameter portions 23d and 23b of the switching rod can slide but cannot be switched at other positions. The operation of the grounding device is similar to the operation of the disconnector.

  5 and 6, a manual handle insertion hole 2a is provided in a case (not shown) of the operating device, and a slider 26 is provided on a fixed plate 25 fixed to the operating device so as to be slidable up and down. A manual handle insertion hole 2a is provided in the case of the operation device, and the slider 26 is connected to a shutter 27 that opens and closes the manual handle insertion hole 2a through which the manual handle is passed from the outside of the operation device into the operation device. The manual handle is connected to a mechanism for rotating the operating shaft 2 (see FIG. 1) in the operating device. When a manual operation condition is satisfied by a control means (not shown), the shutter 27 rotates to open the manual handle insertion hole 2a, and the slider 26 can be lowered.

  In FIG. 5, since the “motorized operation” mode is set and the stopper 21 and the stop pin 22 are pulled forward, the slider 26 cannot contact the stopper 21 to open the shutter 27. Since the stopper 21 has an arc shape and the slider hits the “on”, “off”, and “ground” positions, the manual handle insertion hole 2a is closed, so that the manual handle cannot be passed through the manual handle insertion hole 2a. Manual operation is not possible. In this state, the limit switch 28 that displays “shutter open” of the shutter 27 does not operate, and the stopper 21 is pulled forward, so that “manual operation of disconnector” or “manual operation of grounding device” is displayed. Limit switches 29a and 29b also do not operate.

  In FIG. 6, since the stopper 21 and the stop pin 22 are set in the position of the “disconnector manual operation” mode in which they are pushed in, the slider 26 slides freely without hitting the stopper 21 and the shutter 27 is moved. Since it 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 to output a signal, and the “shutter open” signal is continued until the handle is pulled out.

  Further, the stopper 21 operates the limit switch 29a to output a signal for operating the disconnector. This signal continues at any position from “OFF” to “ON” until another operation mode is switched. The limit switch 29b does not operate at any position during the “disconnector manual operation” mode, and operates when the “grounding device manual operation” mode is set to output a signal. In this way, the setting position of the stopper is detected by the limit switch, and the disconnector operation and the grounding device operation can be distinguished.

  Further, since the slider 26 prevents the stopper 21 from moving in the axial direction while the manual handle is being inserted, switching between the “electric operation” and the “grounding device manual operation” can be performed unless the handle is once pulled out at the “OFF” position. Can not.

1: Motor 2: Operation shaft 2a: Manual handle insertion hole 3: Reduction gear 4: Drive gear 5: Input shaft
6a, b: driving roller
7a, b: Arc convex part 8: Geneva gear
8a to c: arc recess 8d, e: driving roller engaging groove 9: output shaft 9a: operation mechanism 10: movable contact 11: disconnector fixed contact 12: grounding device fixed contact 21: stopper 22: stopper pin 23: Switching rod 23a, b: Small diameter portion 24 of the switching rod 24: Spring 25: Fixed plate 25a: Slit of fixed plate 26: Slider 27: Shutter 28: Limit switch 29a, b: Limit switch

Claims (3)

A three-position switch equipped with a disconnector and a grounding device is equipped with a Geneva gear that switches between the three positions `` On '', `` Off '', and `` Grounding '' and a drive gear that drives the Geneva gear,
The drive gear has a pair of arc convex portions and a pair of drive rollers on a side surface,
The Geneva gear engages with the arc convex portions to maintain the “on”, “cut”, and “ground contact” positions, and the three arc concave portions for idling the drive gear, and these arc concave portions A pair of driving roller engaging grooves for engaging the driving roller and transmitting a rotational force to the output shaft of the Geneva gear,
The three circular arc recesses are arranged such that the angles between “cut” and “on” and “cut” and “ground” are the same as the operating angle of the output shaft,
The pair of driving roller engagement grooves are arranged so that an angle between “cut” and a half of the operation angle of the output shaft is set,
In the state of the “cut” position, the pair of driving rollers includes a position where one driving roller engages with one roller engaging groove on the same side, and the other driving roller on the other side. An operating device for a three-position switch, wherein the operating device is arranged at a position where the engaging groove is engaged. A switching rod for switching the mode of “disconnector manual operation”, “electric operation” or “grounding device manual operation” is slidable in the arc-shaped slit formed on the fixed plate fixed to the operation device and the shaft In a direction that can move forward and backward,
The switching rod is formed integrally with a stopper provided with a stopper pin,
The width of the slit is wider than the outer diameter of the switching rod at the “cut” position, and is narrower than the outer diameter of the switching rod at the other positions but wider than the small diameter portion, and the position of the stopper at the “cut” position. It can be switched, but in other positions, the small diameter of the stopper switching rod can slide, but the mode can not be switched,
The stopper pin moves into the one driving roller engaging groove of the Geneva gear during manual operation of the disconnector, and within the other driving roller engaging groove of the Geneva gear during manual operation of the grounding device. The drive roller is applied to the stopper pin that has been moved to the drive roller engagement groove during each manual operation and is not overrun from `` OFF ''. The three-position switch operating device according to claim 1, wherein the stopper is formed on the stopper so as to be positioned at an intermediate position between the pair of driving roller engaging grooves that do not act. A slider is slidably provided on the fixed plate,
A shutter for opening and closing a manual handle insertion hole for inserting a manual handle for rotating the operation shaft of the drive gear from the outside;
In the “electric operation” mode, the shutter and the slider cannot open the shutter because the slider hits the stopper, and in the manual operation mode, the shutter opens the manual handle insertion hole without the slider hitting the stopper. The three-position switch operating device according to claim 2, wherein the three-position switch operating device is arranged so as not to be able to.

Images