JP4237536B2 - Intermittent drive device for on-load tap changer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intermittent drive device for an on-load tap switching device that is connected between a drive unit of a tap selector and a shift switching unit and converts the rotation of the input shaft of the drive unit into an intermittent rotation of the drive shaft for the shift switching unit. It is about.
[0002]
[Prior art]
Conventionally, in a load tap changer, a dislocation changer has been used for the purpose of expanding the adjustment range of the tap winding. As an example, an intermittent drive device is attached between the shift switching unit and the drive unit of the tap selector, the tap selector is operated by rotation of the input shaft of the drive unit and the intermittent drive device, and the input shaft There is one that operates the shift switching device by converting the rotation of the drive shaft into the rotation of the drive shaft for the shift switching device by the intermittent drive device (see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 62-04403 (2nd and 3rd pages, Fig. 2)
[0004]
That is, according to the intermittent drive device described in Japanese Utility Model Publication No. 62-04403, the drive input of the drive member 11 is performed by rotating the converter input shaft 6 connected to the tap selection switch 2 in FIG. The lever 11a rotates around the converter input shaft 6.
[0005]
Since the drive lever 11a is provided with a pin 12 facing downward at the tip thereof, the pin 12 meshes with the sprocket gear 13a by the rotation of the drive lever 11a, and the interlocking member 13 is utilized using the bearing 10c. Rotate.
[0006]
Thereby, the interlocking member 13 is changed from the state shown in FIG. 6 described in the publication (the state in which the notch 13b of the stop member 13c is fitted to the outer diameter of the stop member 11c) to FIG. Transition is made sequentially with FIG.
[0007]
As a result, as shown in FIG. 5 of the same publication, the drive pin 14 mounted downward from the stop member 13c sequentially shifts from FIG. 5A to FIG. 5B to FIG. The movable contact of the converter 9 can be rotated by rotating clockwise around the shaft 8.
[0008]
[Problems to be solved by the invention]
However, in the conventional intermittent drive device described above, the drive pin 14 of the stop member 13c is moved from the state shown in FIG. 5A in which the shaft of the stop member 13c is engaged with the outermost arc of the driven vehicle 15. When engaging the groove 15b of the driven vehicle 15 (FIG. 5B), a part of the shaft of the stop member 13c is used to release the engagement between the outermost arc of the driven vehicle 15 and the shaft of the stop member 13c. Is cut in the vertical direction to form a plane portion.
[0009]
Since the outermost arc of the driven vehicle 15 is structured to apply a braking force between both members by engaging with the shaft of the stopping member 13c, if the braking force is too small, the stopping member 13c There is a possibility that the mechanism portion may be damaged by being caught in the rotation of the shaft and being caught between the driven vehicle 15 and the stop member 13c. Therefore, in order to obtain a sufficient braking force between the shaft of the stop member 13c and the outermost arc of the driven vehicle 15, it is necessary to increase the contact area between both members.
[0010]
In this realization, a method of ensuring a sufficiently long arc by forming the outermost part of the driven vehicle 15 wide is conceivable. In this case, however, the arc becomes long, so that the stop member 13c inevitably becomes long. The flat portion formed on the shaft must be formed wide, and as a result, the circumference of the stop member 13c other than the flat portion of the shaft is shortened, so that the timing angle of braking and releasing between both members can be matched. It was very difficult.
[0011]
Accordingly, a method of increasing the shaft diameter of the stop member 13c to increase the distance between the output shaft 8 and the shaft of the stop member 13c, and sufficiently securing the circumferential length of the stop member 13c other than the planar portion. However, in this case, there is a problem that the intermittent drive device itself is increased in size as the distance between the output shaft 8 and the stop member 13c increases.
[0012]
Further, as shown in FIG. 5C described in the above publication, the stop member 13c is configured such that the outermost arc of the driven vehicle 15 is engaged with the shaft of the interlocking member 13 after the drive pin 14 is disengaged from the groove 15b of the driven vehicle 15. In combination, the reverse rotation of the follower wheel 15 is prevented, and the outer diameter of the stop member 11c is again fitted to the missing circle portion 13b of the interlocking member 13 due to the continued rotation of the converter input shaft 6. The structure was such that 13 reversals were prevented.
[0013]
In other words, in the conventional intermittent drive device described above, in order to prevent the tap selector from operating (changing) against the tap position or the converter unexpectedly due to the vibration of the transformer or the like or for some reason. Next, the arc of the driven vehicle 15 and the shaft of the interlocking member 13 are brought into contact with each other, and the outer circle diameter of the stop member 13c and the stop member 11c are brought into contact with each other. It is configured to block.
[0014]
  Therefore, in order to reliably prevent reverse rotation and rattling (swing) of the driven vehicle 15 and the interlocking member 13, the shaft of the interlocking member 13, the arc of the driven vehicle 15, the outer diameter of the stop member 11c, and the stop member 13c, respectively. Missing circle 13bMust match each other with high accuracy.
[0015]
That is, the two parts (the shaft of the interlocking member 13 and the driven vehicle 15, the outer diameter of the stopping member 11 c and the missing circular portion 13 c of the stopping member 13 c) are brought into contact with each other, and the driven vehicle 15 and the stopping member 13 c are reversed. In order to reliably prevent the swinging and realize the braking, it is necessary to completely match the curvature of the surface where both parts abut.
[0016]
  Then, the arc of the driven vehicle 15 and the missing circle 13 of the stop member 13bIn general, cutting by an automatic machine is mainly used for forming the curved portion of the above. However, in the cutting process by the automatic machine, it is basically necessary to prepare programming for the cutting in advance. There is a problem in that the work setup takes a lot of labor and time, and the production cost increases.
[0017]
Therefore, in view of the above-mentioned problems, the present invention is a miniaturized load tap that can be easily manufactured and that can easily and reliably realize the operation of the converter (displacement switching device) and the prevention of the reverse rotation. An object is to provide an intermittent drive device for a switching device.
[0018]
[Means for Solving the Problems]
  The intermittent drive device for a tap switching device according to claim 1 comprises an output shaft for selecting a tap, a rotating plate that rotates around the output shaft, and a rotating plate that is concentric with the rotating plate. A guide ring that rotates in a circular shape, a pair of notches formed in the circumferential direction of the guide ring at predetermined angular intervals, a drive pin that rotates about the output shaft on the rotary plate, and engages with the drive pin A driven portion having a transmission pin that rotates forward and backward, a drive shaft for a shift switching device that rotates by rotation of the driven portion, and a constraining roller that passes through the notch by rotation of the driven portion;The rotating plate is provided with the drive pin protruding outside the center between a pair of the notches, and the follower is an essential position of a fan-shaped plate when the follower is in a neutral position. The drive shaft for the shift switch fixed to the fixed position is fixed, and the inner position of the guide ring and the inner position of the guide ring are symmetrically sandwiched across the center line connecting the drive shaft for the shift switch and the output shaft for tap selection. The drive roller is disposed with the restraint roller disposed between the outer position of the guide ring sandwiching each of the pair of notches and the outer position on the drive shaft side for the shift switching device, and sandwiching the center line. By arranging the transmission pin on the rotation track of the pin, the transmission pin is engaged with the drive pin, and the driven portion is rotated about the drive shaft for the shift switching device to Clamp the roller from the inside and outside of the guide ring By Rukoto, limiting the operation of the drive shaft for the follower and dislocation switcher.
[0019]
According to the intermittent drive device of the on-load tap switching device according to claim 1, when operating the tap selector by rotating the output shaft for tap selection, the drive pin provided on the rotating plate that rotates around the output shaft Is engaged with a transmission pin mounted on the driven portion, the driven portion connected to the drive shaft for the shift switching device can be rotated easily and reliably.
[0020]
  According to the first aspect of the present invention, the restraining roller protruding on the driven portion is guided by the guide ring following the pushing of the transmission pin of the drive pin that rotates around the output shaft for tap selection together with the rotating plate. The first constraining roller that is in contact with the inner side of the guide ring and the second constraining roller that is positioned on the outside after the constraining roller has passed through the notch portion. Thus, the driven portion can be braked automatically by sandwiching the guide ring, and the selection of the tap, the operation of the shift switch and the braking of the driven portion can be reliably realized in conjunction with each other.
[0021]
  The intermittent drive device of the tap switching device at the time of loading according to claim 22. The on-load tap switching device according to claim 1, wherein the restraining roller is a first restraining roller when in a position where the restraining roller is in contact with the inside of the guide ring, and is in a position with which the restraining roller is in contact with the outside of the guide ring. When the second constraining roller is in a position where it does not contact the guide ring, the third constraining roller becomes a third constraining roller. The guide roller is sandwiched from the inside and the outside by the restraint roller while changing the position of the restraint roller with respect to the guide ring through the notch.
[0022]
  According to the intermittent drive device of the on-load tap switching device according to claim 2, since the inversion of the driven portion that drives the shift switching device can be surely prevented by the first and second restraining rollers, In order to prevent reversal, it is not necessary to obtain a required braking force by increasing the diameter of the guide ring, and it is possible to prevent the intermittent drive device from becoming large. Further, since the guide ring and the restraining roller can be easily manufactured by lathe processing or boring work, the processing time of the parts can be shortened and the manufacturing cost can be reduced.
[0023]
  Also,Claim2According to the intermittent drive device of the described on-load tap switching device, the first to third restraining rollers are:Because the guide ring can be braked by changing the position relative to the guide ring according to the rotation of the driven portion,Reliable follower with fewer partsofbrakingBecomes possibleTherefore, simplification of the apparatus and reduction of product cost can be reliably achieved.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an example of the overall configuration of the tap selector of the on-load tap switching device. In FIG. 1, reference numeral 16 denotes power transmitted from an operating mechanism (not shown) via a power transmission mechanism (not shown). Shows a rotating Geneva driver.
[0027]
Reference numeral 17 denotes a Geneva gear that intermittently rotates at a predetermined angle by the rotation operation of the Geneva driver 16, and an output shaft 18 for driving the tap selector A is connected and fixed to the center of the lower surface of the Geneva gear 17.
[0028]
Reference numeral 19 denotes a movable contact in which a total of six sets (three phases) are arranged along the longitudinal direction of the output shaft 18 as two phases (19a, 19b) for one phase. The movable contacts 19a are alternately contacted with fixed contacts 21a and 21b each having three odd and even sides attached to the insulating plate 20 arranged in a row (fixed between the upper and lower gear cases 38a and 38b). , 19b are electrically connected to current collecting contacts (for even numbers and odd numbers) 22a, 22b and the fixed contacts.
[0029]
Reference numeral 23 denotes an intermittent drive device that converts the rotation operation of the Geneva gear 17 into a rotation operation of a drive shaft (hereinafter simply referred to as a shift drive shaft) 24 for a shift switching device, and 25a denotes the shift drive shaft 24 at the base end. An arm rod is shown which is pivotally supported, has an insulated drive shaft 26 attached to the tip perpendicularly thereto, and supports the insulated drive shaft 26 movably within a certain angular range around the dislocation drive shaft 24. The other end of the insulated drive shaft 26 is fixed to an arm rod 25b that is rotatably attached to the lower gear case 38b using a bearing 45b.
[0030]
Reference numeral 27 denotes a movable contact for a shift switching device attached to the insulated drive shaft 26 for three phases. Reference numeral 28 denotes an insulation attached between the upper and lower gear cases 38a and 38b in parallel with the insulated drive shaft 26. On the plate 29, two fixed contacts (see FIG. 2), each mounted at a height corresponding to the movable contact 27, are alternately arranged with the movable contact 27 according to the operation of the insulated drive shaft 26. The dislocation switcher is switched in contact with.
[0031]
Next, the configuration of the intermittent drive device 23 will be described in detail. 2 is a plan view showing the tap selector A shown in FIG. 1 from above, and FIG. 3 is an enlarged longitudinal sectional view showing only the intermittent drive device 23 extracted from the tap selector A. As shown in FIG.
[0032]
As shown in FIG. 3, the intermittent drive device 23 includes a Geneva driver 16 that rotates by receiving power from an operation mechanism (not shown), and a Geneva gear 17 that meshes with the Geneva driver 16 and rotates intermittently. The follower 30 that is rotated by the Geneva gear 17 is schematically provided.
[0033]
For example, as shown in FIG. 2, the Geneva driver 16 cuts arc portions facing each other of the rotating disk to alternately form linear portions 16a and arc portions 16b, and forms a center axis X as an axis. It is attached as rotatable. Further, as shown in FIG. 3, engaging pins 31 projecting downward near the outer peripheral edge (near the center of the arc portion 16b) are attached to the lower surface of the Geneva driver 16 at an angular interval of 180 °. ing.
[0034]
The Geneva gear 17 has an uppermost portion 33 formed continuously with a concave arc groove 32 that contacts the arc portion 16b of the Geneva driver 16, and an engagement groove 34 with which the engagement pin 31 of the Geneva driver 16 engages. And a hollow cylindrical guide ring 36 formed to have substantially the same diameter as the uppermost portion 33 projecting downward from the lower surface of the gear portion 35 (see FIG. 3).
[0035]
The concave arcuate groove 32 is formed with two different curvatures. That is, the curvature of both ends of each concave arc groove 32 is the same (the same radius of curvature) as the arc portion 16b of the Geneva driver 16, while the curvature of the central portion of each concave arc groove 32 is different from the curvature of both ends. (Small compared to the radius of curvature at both ends).
[0036]
In addition, a drive pin 37 protrudes downward in the vicinity of the outer peripheral edge of the gear portion 35 of the Geneva gear 17, and the Geneva gear 17 in this state has an output shaft for tap selection at the center thereof. As shown in FIG. 1, the upper gear case 38a and the lower gear case 38b are rotatably mounted using bearings 39a and 39b, respectively.
[0037]
Next, the configuration of the Geneva gear 17 and the driven unit 30 will be described with reference to FIG. FIG. 4 is a plan view showing the geneva gear 17 and the driven portion 30 of the intermittent drive device 23 from above in FIG.
[0038]
As shown in FIG. 4, two notches 40 and 41 are formed at a predetermined interval on the side peripheral wall of the guide ring 36 formed in a hollow cylindrical shape, and a central outer side between the notches 40 and 41 is formed. A drive pin 37 is attached to the lower surface of the Geneva gear 17 using a fixed seat 37a.
[0039]
The follower 30 is disposed in a direction in which a main part of the plate body 30 formed in a substantially fan shape is positioned outside the guide ring 36 and in the vicinity of the lower end of the guide ring 36 without coming into contact therewith, and the plate body 30a. The dislocation drive shaft 24 is coupled to the main portion of the main shaft by a fitting key 24a so as to be capable of co-rotating.
[0040]
Further, a plurality of restraining rollers 42 (six in FIG. 4) and transmission pins 43 (two in FIG. 4) are erected on the plate body 30a toward the Geneva gear 17 side. A part of this part exists inside the guide ring 36 and abuts against the inner peripheral wall of the guide ring 36, and another part abuts against the outer peripheral wall of the guide ring 36.
[0041]
In addition, the other part does not abut against the guide ring 36 and is standing at a position apart from the guide ring 36, but the positional relationship of the restraining rollers 42 changes with the operation of the driven unit 30. In this embodiment, the restraining roller that contacts the inner peripheral wall of the guide ring 36 is the first restraining roller, the restraining roller that contacts the outer peripheral wall of the guide ring 36 is the second restraining roller, and the guide ring 36. The restraining roller that does not come into contact with is referred to as a third restraining roller.
[0042]
That is, the name of the restraining roller 42 changes one by one in accordance with the position where it exists, and its role also changes. The pair of transmission pins 43 are mounted on the rotation path of the drive pin 37 in a state after the driven unit 30 rotates forward and backward, and the driven unit 30 operates with respect to the guide ring 36. Regardless of whether it is always outside.
[0043]
A specific example of the attachment position of the restraining roller 42 will be described. As shown in FIG. 5, an output shaft fixed at the center of the Geneva gear 17 and a dislocation drive shaft attached to the main part of the fan-shaped plate 30a of the driven portion 30. 24 and the center between a pair of notches 40 and 41 formed in the guide ring 36 and a drive pin 37, and the pair of transmission pins 43 sandwich the center line. When the drive pin 37 is symmetrically sandwiched from both side surfaces (hereinafter referred to as a neutral position of the driven portion 30), the two restraining rollers are symmetrically sandwiched between the guide ring 36 and the center line. 42 is arranged.
[0044]
Each of the two constraining rollers 42 arranged inside the guide ring 36 and one constraining roller outside the guide ring 36 sandwiching a pair of notches 40 and 41 formed in the guide ring 36, respectively. 42 is arranged.
[0045]
Further, two restraints arranged outside the guide ring 36 between each of the two restraining rollers 42 arranged outside the guide ring 36 and the shift drive shaft 24 fixed to a main part of the plate body 30a. A plurality of (six in FIG. 4 and FIG. 5) restraint rollers 42 are erected on the driven portion 30 by disposing the restraint rollers 42 one by one at a distance from the rollers 42.
[0046]
The driven portion 30 is disposed so as to overlap the Geneva gear 17 with a part of the restraining roller 42 always intruding into the guide ring 36 of the Geneva gear 17 so that the driven portion 30 can be rotated forward and backward. Therefore, a part of the constraining roller 42 is configured to pass through the notches 40 and 41 of the guide ring 36 and move its position in and out of the guide ring 36.
[0047]
Further, as shown in FIG. 3, the follower 30 is attached so as to be interlocked with the shift drive shaft 24 by a fitting key 24 a of the shift drive shaft 24 connected to the Geneva driver 16 via a bearing 44. The lower end of the shift drive shaft 24 is arranged in the middle of the bearing 45a and enters the upper gear case 38a. The lower end of the shift rod 24 is an arm rod that drives the movable contact 27 for the shift switch described above. The intermittent drive device 23 is configured by fixing 25a.
[0048]
Next, the operation of the intermittent drive device 23 will be described. When the Geneva driver 16 shown in FIG. 2 rotates in response to the transmission of power from an operating mechanism (not shown), the Geneva driver 16 slides the arc portion 16b on the concave arc groove 32 of the Geneva gear 17 so as to move around the central axis X. For example, it rotates in the arrow direction (clockwise direction) shown in FIG.
[0049]
When the rotation is continued, the Geneva driver 16 engages one of the engagement grooves 34 of the Geneva gear 17 with the engagement pin 31 protruding from the lower surface of the arc portion 16b. At this time, the arc portion 16b of the Geneva driver 16 abuts only at both ends of the concave arc groove 32 of the Geneva gear 17 (the same curvature as each other), and a predetermined gap is formed from the difference in curvature with the central portion. Therefore, the rotation restricting force between the Geneva driver 16 and the Geneva gear 17 is reduced by the presence of the central portion.
[0050]
Therefore, the Geneva driver 16 can be rotated well by engaging the engaging pin 31 with the engaging groove 34 of the Geneva gear 17, and the Geneva gear 17 is forcibly rotated by a fixed angle around the output shaft 18. To do. This rotation is continued until the engagement pin 31 is disengaged from the engagement groove 34.
[0051]
After the engagement pin 31 is disengaged from the engagement groove 34, even if the Geneva driver 16 continues to rotate in the clockwise direction, the Geneva gear 17 will rotate further until the Geneva gear 17 rotates 180 ° again. There is no. That is, the Geneva gear 17 is intermittently rotated by a certain angle by engaging the engagement pin 31 of the Geneva driver 16 with one of the engagement grooves 34 every time the Geneva driver 16 rotates 180 °.
[0052]
In this manner, when the Geneva gear 17 rotates by a predetermined angle, the output shaft 18 connected to the center of the Geneva gear 17 rotates by the same angle as the Geneva gear 17, and the movable contacts 19a and 19b shown in FIG. Is operated to alternately contact the fixed contacts 21a and 21b attached to the surrounding insulating plate 20 to select a target tap.
[0053]
After the selection of the tap is completed, the Geneva driver 16 is returned to the original position shown in FIG. It is possible to reliably prevent rotation against the intention.
[0054]
Next, the operation of the Geneva gear 17 and the driven unit 30 which are the gist of the present invention will be described. As described above, when the Geneva gear 17 is intermittently rotated by the Geneva driver 16, the drive pin 37 protruding from the lower surface of the Geneva gear 17 moves away from the position shown in FIG. 6A as the Geneva gear 17 continues to rotate. Rotate clockwise.
[0055]
At this time, since the drive pin 37 is always arranged between the pair of notches 40 and 41 formed in the guide ring 36, the notches 40 and 41 are similarly moved along with the rotational movement of the drive pin 37. Rotate counterclockwise.
[0056]
On the other hand, in the state shown in FIG. 6A, the restraining rollers 42 a and 42 c out of the restraining roller 42 projecting on the driven portion 30 are formed from the notch 41 of the guide ring 36 to the inside of the guide ring 36. The guide ring 36 is sandwiched between the constraining rollers (second constraining rollers) 42b and 42d that abut the inner peripheral wall and contact the inner peripheral wall (first constraining roller) and abut the outer peripheral wall of the guide ring 36. Yes. At this time, the restraining rollers 42e and 42f are present as the third restraining roller without contacting the guide ring 36.
[0057]
When the Geneva gear 17 continues to rotate (counterclockwise) and the drive pin 37 reaches the position shown in FIG. 6B, the drive pin 37 is connected to the transmission pin 43a provided on the driven portion 30. The driven part 30 is pushed and pushed, and the driven part 30 is rotated in the clockwise direction together with the dislocation drive shaft 24 (see FIG. 7A).
[0058]
In this state, the restraining roller 42a protruding on the driven portion 30 passes through one notch 40 of the guide ring 36 and comes out of the guide ring 36. Instead, the restraining roller 42d is notched on the other notch. The state shifts from 41 to the state of intrusion into the guide ring 36.
[0059]
When the Geneva gear 17 further rotates counterclockwise and the drive pin 37 pushes the transmission pin 43a, the driven unit 30 rotates with the shift drive shaft 24 clockwise to the position shown in FIG. As a result, the restraining roller 42c on the driven portion 30 passes through one notch 40 of the guide ring 36 and moves to the outside of the guide ring 36 to act as a second restraining roller, while the restraining roller 42e It enters the guide ring 36 through the notch 41 and acts as a first restraining roller.
[0060]
The constraining roller 42f is in contact with the side peripheral wall of the guide ring 36 from the outside along with the rotation of the driven portion 30 and serves as a second constraining roller. The constraining rollers 42a and 42b are connected to the guide ring 36. It exists as a third restraining roller without contact.
[0061]
Even after the transition to the state shown in FIG. 7B, the Geneva gear 17 can continue to rotate, and the guide ring 36 has restraining rollers (first restraining rollers) 42d and 42e on its inner peripheral wall. The drive pins 37 are again connected to the transmission pins while the restraint rollers (second restraint rollers) 42c and 42f are brought into contact with the outer peripheral wall and the rollers 42d, 42e, 42c and 42f are rotated between them. A maximum of 360 rotations can be made in the counterclockwise direction until it hits 43b and stops.
[0062]
As described above, the rotation of the Geneva gear 17 causes the driven portion 30 to shift together with the driven portion 30 when the driven portion 30 sequentially shifts to the state shown in FIG. 6A → FIG. 7B → FIG. 7A → FIG. The drive shaft 24 rotates between the Geneva driver 16 shown in FIGS. 1 and 3 and the upper gear case 38a using bearings 44 and 45a.
[0063]
As the shift drive shaft 24 rotates, the arm rod 25a fixed to the lower end of the shift drive shaft 24 rotates around the shift drive shaft 24 together with the arm rod 25b, and is vertically attached between the arm rods 25a and 25b. By operating the insulating drive shaft 26, the movable contact 27 for the shift switching device is moved between two adjacent fixed contacts 28 to switch the shift switching device.
[0064]
After the shift switching device is switched, the driven portion 30 is in the state shown in FIG. 7B. That is, the restraining rollers 42d and 42e serve as the first restraining rollers on the inner peripheral wall of the guide ring 36. The restraint rollers 42c and 42f are in contact with the outer peripheral wall of the guide ring 36 as second restraint rollers, and the operation of the driven portion 30 is performed by the restraining rollers 42d, 42e, 42c and 42f. Since the guide ring 36 is sandwiched, the guide ring 36 is surely limited, and the driven portion 30 can be reliably prevented from being reversed or swung with the shift drive shaft 24.
[0065]
That is, the intermittent drive device of the on-load tap switching device of the present invention includes the drive pin 37 on the Geneva gear 17 that rotates intermittently by the rotation of the Geneva driver 16, and the transmission pin 43 of the driven unit 30 is connected to the drive pin 37. By pushing, the follower 30 can be rotated to switch the shift switch easily and reliably.
[0066]
  Further, the Geneva gear 17 is provided with a hollow cylindrical guide ring 36 and a pair of notches 40 and 41 are formed at predetermined angular intervals in the circumferential direction of the guide ring, and the driven portion 30 is pushed by the drive pin 37. Each time, a part of the restraining roller 42 of the driven portion 30 enters the guide ring 36, and a part of the restraining roller 42 is passed from the inside to the outside of the guide ring 36. The ring 36 is clamped by a restraining roller that has moved in and out, so that the driven unit 30 can be reliably prevented from swinging or reversing with the displacement drive shaft 24, so that unintended rotation of the driven unit 30 is prevented. In order to achieve this, the guide ring is formed to have a large diameter and an insulated drive shaft26By enlarging the inter-axis distance between the dislocation drive shafts 24, it is possible to completely prevent the intermittent drive device 23 from becoming large.
[0067]
Furthermore, the guide ring 36 and the constraining roller 42 are easily manufactured by lathe processing and boring work that can be realized only by a simple program or coordinate instructions, without cutting using an automatic machine that requires preparation of complicated programming. Therefore, parts can be manufactured efficiently in a short time, and the manufacturing cost of the apparatus can be effectively reduced.
[0068]
In the above-described embodiment, the geneva driver 16 is provided with the linear portion 16a and the arc portion 16b, and the engagement pin 31 is projected from the lower surface of the geneva driver 16 with an angular interval of 180 °. The Geneva gear 17 is intermittently rotated by engaging the engaging pin 31 with a part of the engaging groove 34 of the Geneva gear 17, and unintentional rotation of the Geneva gear 17 is caused by the arc portion 16 b of the Geneva driver 16 and the Geneva gear 17. Although the example which prevents by making the concave circular-arc groove | channel 32 contact is demonstrated, this invention is not limited to this, For example, it is the same as the guide ring 36 and the drive pin 37 which were attached to the Geneva gear 17 on the Geneva driver 16. The guide ring and the drive pin, and the restraining roller 42 provided in the driven portion 30 on the Geneva gear 17 and The constraining roller and the transmission pin similar to the delivery pin 43 are properly arranged, and the Geneva gear 17 is rotated intermittently by causing the drive pin on the Geneva driver 16 to abut against the transmission pin on the Geneva gear 17. It is a matter of course that the reversal of 17 may be limited by the guide ring on the Geneva driver 16 and the restraining roller on the Geneva gear 17.
[0069]
【The invention's effect】
The intermittent drive device of the on-load tap switching device according to claim 1 is configured such that the drive pin protruding from the rotary plate is brought into contact with the transmission pin of the driven portion by the rotation of the rotary plate pivotally supporting the output shaft for selecting the tap. In this case, the restraint roller protruding from the follower moves through the notch portion of the guide ring, so that the pivoting operation of the follower by the rotating plate interferes with the restraint roller. This is convenient, because the follower can be rotated easily and reliably and the shift switch can be switched.
[0070]
  Also,Claim1The intermittent drive device of the described on-load tap changer isFollowing the push of the transmission pin of the drive pin that rotates around the output shaft for selecting the tap together with the rotating plate, the constraining roller protruding on the driven portion can be passed through a pair of notches formed in the guide ring. After the constraining roller passes through the notch, the guide ring is automatically clamped by the first constraining roller that contacts the inside of the guide ring and the second constraining roller that is positioned outside, and the driven part is braked. This is convenient because the selection of taps, the switching of the shift switch and the braking of the follower can be realized at the same time.
[0071]
  The intermittent drive device for the on-load tap switching device according to claim 2 has the guide ring held between the first and second restraining rollers provided in the driven portion, so that the driven portion operating the shift switching device is contrary to the intention. Since it is a structure that restricts rotation, the notch portion of the guide ring only needs to have a width through which the restraining roller passes, and other than the notch portion even if the angular interval forming the pair of notch portions is increased. The circumference of the guide ring is not shortened, and the intermittent drive device itself is enlarged by increasing the distance between the shafts of the tap selection output shaft and the displacement drive shaft by increasing the guide ring diameter. The problem can be solved reliably.
[0072]
  Further, it is not necessary to match the curvatures of the two parts that correspond to (contact) each other in order to brake the rotation of the driven part as in the prior art. Manufacturing is possible, and it is possible to manufacture the apparatus at low cost by suppressing the manufacturing cost, which is convenient.
[0073]
The intermittent drive device of the on-load tap switching device according to claim 4 is a restraint projecting on the driven portion following the pushing of the transmission pin of the drive pin that rotates around the output shaft for tap selection together with the rotating plate. The roller can be passed through a pair of notches formed in the guide ring, and after the restraining roller has passed through the notch, the first restraining roller contacting the inside of the guide ring and the second restraining roller positioned outside. Constraining rollers can automatically pinch the guide ring to brake the driven part, and tap selection, switching of the changeover switch and braking of the driven part can be realized at one time, which is convenient. .
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a tap selector of an on-load tap switching device according to the present invention.
FIG. 2 is a top view of the tap selector.
FIG. 3 is an enlarged longitudinal sectional view showing an intermittent drive device of the present invention.
FIG. 4 is a plan view showing a relationship between a Geneva gear and a driven portion constituting the intermittent drive device.
FIG. 5 is a plan view showing a positional relationship with a Geneva gear when the driven portion is in a neutral position.
FIG. 6 is a plan view for explaining an operation transition of the driven unit.
FIG. 7 is a plan view for explaining a state in which the operation of the follower has further changed.
[Explanation of symbols]
16 Geneva Driver
16a straight section
16b Arc part
17 Geneva Gear
18 Output shaft for tap selection
19a, 19b Movable contact (for even number, for odd number)
20, 29 Insulation plate
21a, 21b Fixed contact (for even number, for odd number)
22a, 22b Current collecting contact (for even number, for odd number)
23 Intermittent drive
24 Drive shaft for shift selector (shift drive shaft)
24a, 24b Insertion key
25a, 25b Arm rod
26 Insulated drive shaft
27 Movable contact for shift switch
28 Stationary contact for shift selector
30 Follower
31 engaging pin
32 concave arc groove
33 top
34 Engagement groove
35 Gear part
36 Guide ring
37 Drive pin
38a Upper gear case
38b Lower gear case
39a, 39b, 44, 45a, 45b Bearing
40, 41 Notch
42 Restraint roller
43 Transmission pin
A Tap selector
X Center axis

Claims (2)

An output shaft for selecting taps, a rotating plate that rotates around the output shaft, a guide ring that is provided on the rotating plate and rotates concentrically with the rotating plate, and a circumferential direction of the guide ring A pair of notches formed at a predetermined angular interval; a drive pin that rotates about the output shaft on the rotating plate; a driven portion that includes a transmission pin that engages with the drive pin and rotates forward and backward; and A drive shaft for a shift switching device that rotates by rotation of the driven portion; and a constraining roller that passes through the cutout portion by rotation of the driven portion; and the rotating plate has the drive pin on the center outer side between the pair of cutout portions. The driven portion is fixed to a drive shaft for the shift switching device fixed to the essential position of the fan-shaped plate when the driven portion is in the neutral position. Center line connecting the drive axis of the and the output shaft for tap selection Symmetrically sandwiched between, an inner position of the guide ring, an outer position of the guide ring sandwiching each of the inner positions and the pair of notches, and the vicinity of the outer position on the drive shaft side for the shift switching device The constraining roller is disposed on the rotation pin, and the transmission pin is disposed on a rotation track of the driving pin across the center line. The movement of the follower and the drive shaft for the changeover switch is restricted by rotating the drive shaft about the drive shaft for the changeover switch and sandwiching the restraining roller from the inside and the outside of the guide ring. An intermittent drive device for a tap changer when loaded. The restraining roller becomes a first restraining roller when it is in contact with the inner side of the guide ring, and becomes a second restraining roller when in contact with the outside of the guide ring, and comes into contact with the guide ring. When it is in a position where it does not, it becomes a third constraining roller, and by providing the constraining roller in the driven part, the constraining roller passes through the notch part by the forward / reverse rotation operation of the driven part, and the guide 2. The intermittent drive device for a tap switching device according to claim 1 , wherein the guide ring is sandwiched from inside and outside by the restraining roller while changing the position of the restraining roller with respect to the ring. .

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