JPS621212A - Energy storing device for on-load tap changer - Google Patents

Abstract

PURPOSE:To reduce loss generated in a sliding section by supplying the sliding section with an eccentric plate, disposing the fixing points of a driving shaft fastened to the eccentric plate along the line of the direction of sliding and forming an energy storing device so as to have the relationship of work in a both-end support system sliding section. CONSTITUTION:When a sliding section 15 is pushed through an eccentric plate 12 fixed to a driving shaft 11 by driving force from a driving mechanism and displaced gradually in the A direction, an energy storing case 23 is fastened by a stopper at that time. An energy storing spring 20 consisting of a compression spring is compressed in the state, and the quantity of compression of the energy storing spring 20 slowly increases. When the quantity of compression of the energy storing spring 20 reaches a maximum position, a catch is tripped by a tripping pawl 17 and the energy storing spring 20 is released, and the energy storing case 23 is displaced instantaneously in the A direction. A changeover crank 29 connected to the lower side of the energy storing case 23 is turned at that time, thus completing the operation of release of energy storing on the starting of the driving of a diverter switch.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to an energy storage device for an on-load tap changer.

[Technical background of the invention and its problems]

The energy storage device of the conventional on-load tap changer is shown in Fig. 5(a).
As shown in (b), the operating position of the driving force transmitted from the eccentric plate 1 to which the drive shaft 1a is fixed to the hoisting case 2 is on the spring guide shut 4 and the case guide shaft 7 supported by the mounting plate 5. The position is such that the action occurs in an angular direction relative to the sliding direction of the winding case 2 along the sliding direction. That is, the eccentric plate 1 is adapted to slide on the upper sliding portion 2a of the winding case 2. Note that the spring guide shaft 4 is inserted through the compression spring 3 having spring receivers 3a at both ends. Further, in the case guide, a crank portion 8 is attached to the storage case 6 which is slidable on the shaft 7 and is connected to a switching switch (not shown).

When the compression spring 3 is further hoisted and the compression spring 3 is sufficiently loaded, a catch (not shown) is released by the tripping claw 9, the storage case 6 is released and moved, and the crank portion 8 is rotated. Such a device is known from Japanese Patent Publication No. 52-47131. Since such a conventional energy storage device is constructed as described above, it has one winding case 2 and a spring guide shaft 4.
There is a problem in that the sliding portion between the case guide shaft 7 and the case guide shaft 7 has stress that causes loss, making it difficult for the switching switch to switch. As this problem progresses in the future, the stress that causes this loss will increase, making it impossible for the switching switch to switch, and there is a risk that material strength will exceed its limits and lead to destruction. .

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its objectives are to reduce loss occurring in sliding parts, extend mechanical life with a structure that does not generate extra stress, and An object of the present invention is to provide an energy storage device for an on-load tap changer that has improved reliability through reliable switching.

[Summary of the invention]

In order to achieve this object, according to the present invention, four spring guide shafts are arranged in rectangular positions on the mounting plate, and four case guide shafts are arranged inside these, and the spring guide shafts are arranged in rectangular positions on the mounting plate. While aligning the intersection points of the respective diagonals in the cross section orthogonal to the sliding direction of the shaft and the case guide shaft, 1. A sliding part is formed on the winding case on the line in the sliding direction of this intersection, an eccentric plate is housed in this sliding part, and the fixing point of the drive shaft fixed to this eccentric plate is placed along the line in the sliding direction. The present invention is characterized in that it is arranged so as to have an operational relationship in the sliding portion of a so-called both-end support system, thereby reducing loss so as not to generate extra stress in the sliding portion.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the energy storage device for an on-load tap changer according to the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, an eccentric plate 12 to which one end 11a of a drive shaft 11 connected from a drive mechanism (not shown) is fixed is attached to a sliding portion 15 formed by a hole in a winding case 13, as will be described later. It is stored in such a way that it is in good condition.

End plates 16 are provided at both ends of the winding case 13, and a protruding tripping claw 17 is provided on one side surface of the winding case 13. The end plate 16 is provided with insertion holes 18 in protruding portions on the long sides of the rectangle. In addition, a storage spring 20 consisting of a compression spring with a spring guide shaft I9 provided with spring receivers zI at both ends.
, and one side of this spring receiver 21 is inserted into the insertion hole 18 .
The energy storage spring 20 fitted with the spring receiver 21 is inserted into the four insertion holes 18 on one side so that it is disposed inside the winding case 13.
Four spring guide shafts 19 are disposed in each of the four spring guide shafts 19.

Although only one of the spring guide shafts 19 is shown in the drawing, the ends of the four spring guide shafts 19 are fixed at the fixing portions 19a to the mounting plates 22 provided on both sides, and the mounting plates 22 are mounted in a rectangular shape. fixed in position. Further, the winding case 13 configured in this manner is housed inside the storage case 23. This accumulation case 23
is slidably inserted along four case guide shafts 25 whose both ends are fixed to the surface mounting plate 22, respectively.

Furthermore, the four case guide shafts 25 are installed at the mounting positions forming a rectangle, and the four case guide shafts 25 are installed at the mounting positions forming a rectangle so as to surround the four spring guide shafts 19. It is fixed to the mounting plate 22 so that. Furthermore, at both ends of the storage case 23 along the sliding direction, there are notches 2 that match the shape of the end plate 16 to allow the end plate 16 of the inner winding case 13 to pass through during movement.
form 6. A notch 27 for inserting the eccentric plate 12 is formed on the upper side of the storage case 23 in the figure, and a switching crank 29 (not shown) is provided outside the bottom 28.

The details of storing the drive shaft 11 in the sliding portion 15 formed by cutting out the eccentric plate 12 to which it is fixed will be explained again. Assuming a cut plane perpendicular to the spring guide shaft 19 and the case guide shaft 25, the diagonal line 30 of the spring guide shaft 19
．． The intersection point 31 of 30 and the intersection point of diagonal lines 32 and 32 of the case guide shaft 25 are made to substantially coincide.

Also, if the intersection 31 is on the moving line and the sliding part 15
The eccentric plate 12 is installed horizontally, and the center of the fixed portion 11a of the drive shaft 11 is placed on a plane including the line of intersection 31.

Next, the operation of the present invention configured as described above will be explained. In FIG. 2, when a driving force from a drive mechanism (not shown) is applied to the sliding part 15 through the eccentric plate 12 fixed to the drive shaft 11 and the sliding part 15 is displaced in the direction A, the energy storage case 23 is It is fixed by a stopper not shown. In this state, the energy storage spring 20, which is a compression spring, is compressed, and the amount of compression of the energy storage spring 20 gradually increases from the state shown in FIG. 2 to the state shown in FIG.

Furthermore, the state shown in FIG. 4 indicates the position where the amount of compression of the energy storage spring 20 is maximum, and when that position is reached, the trip claw 17 pulls off the catch (not shown) to release the energy storage spring 20 and release the energy storage spring 20. The case 23 is instantly displaced in the A direction. At this time, by rotating the switching crank 29 connected to the lower side of the energy storage case 23 in the drawing, the energy storage release operation at the start of driving the switching switch is completed.

In this way, the sliding part on the upper side of the conventional hoist is driven by an eccentric plate, compressing the energy storage spring provided on the lower side, and it has a structure similar to a cantilever support. , the present invention has a structure similar to a dual-support type, and the loss in the transmission of driving force is reduced compared to the conventional one, and reliability can be improved.

〔Effect of the invention〕

As explained above, according to the present invention, the action and transmission of the driving force in the above-mentioned process is in the direction of the sliding force of the spring guide shaft 19 and the case guide shaft 25;
The action in the axial direction has the effect of reducing energy loss in the sliding portion. Furthermore, since there is less energy loss due to stress, it is possible to provide an energy storage device for an on-load tap changer that can improve switching reliability of the changeover switch and extend its mechanical life.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the energy storage device for the on-load tap changer of the present invention, and Fig. 2 (a L (b), (C
) shows the assembly shown in Fig. 1, and (a) is a plan view. (b) is a side view, (C) is a front view taken along line C-C in figure (b), and Figures 3 (a) and (b) and Figure 4 (a) and (b) are respectively 2 Figure 5(a) shows a state in which the operation in Figure 5(a) has progressed, and Figure 5(a) is a plan view, Figure 5(b) is a side view, and Figure 5(a) is a plan view.
. (b) shows the energy storage device of the conventional on-load tap changer,
(a) is a plan view, and (b) is a side view. ll... Drive shaft, 11a... Fixed part. 12... Eccentric plate, 13... Winding case,
15... Sliding part, 16... End plate. 17...Removal claw, 18...Insertion hole. 19... Spring guide shaft, 20... Energy storage spring, 2
1... Spring holder, 22... Mounting plate. 23... Accumulation case, 25... Case guide shaft. 26...Notch part, 27... Notch part. 28...bottom, 29...switching crank.

Claims (1)

[Claims] The drive shaft is directly connected to an eccentric plate, and the rotation of the eccentric plate causes the compression spring to be hoisted up via a sliding part provided on the hoisting case, and a spring guide shaft is inserted between the hoisting case and the storage case. In the energy storage device of the on-load tap changer, the compression spring is held on the spring guide shaft by a spring receiver, and the two ends of the four spring guide shafts are attached to the opposing mounting plates in a rectangular position. The spring guide shafts are slidably inserted into the winding case using the spring guide shafts as guides, and each of the spring guide shafts inside the winding case has a storage spring with a spring receiver attached at both ends. and fixing both ends of the four case guide shafts in a rectangular position outside the mounting position of the four spring guide shafts on the mounting plate facing the outside of the winding case; Further, the winding case is formed so that it can freely pass through the energy storage case using the spring guide shaft and the case guide shaft as guides, and the winding case is formed so that it can freely pass through the energy storage case using the spring guide shaft and the case guide shaft as guides. The intersection points almost coincide, and a sliding part for housing the eccentric plate is formed on a line along the moving direction of the hoisting case at this intersection point, and furthermore, a fixed part of the drive shaft fixed to the eccentric plate is formed at the intersection point. An energy storage device for an on-load tap changer, characterized in that it is located along the line of.