JPS6362046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a switch operating device suitable for use in, for example, a switch for on-load tap switching of a transformer.

When a vacuum switch is used as an on-load tap changer, instantaneous operation is required for the opening and closing operations performed by moving the movable electrode in the axial direction. In order to obtain this instantaneous operation, a vacuum switch operating device as shown in FIG. 1 has been proposed.

The operating device in FIG. 1 shows a state in which the vacuum switch is opened. When the drive shaft 4 is operated in the direction of the arrow in this state, the end 5a of the release plate 5 that moves together engages with the end of the clutch 2A, thereby locking the latch 2A.
Tilt. The tilting of the clutch 2A gradually increases with the movement of the release plate 5, and the engagement between the engagement portion 2A1 and the collar 7A is released at the end of the movement process of the release plate 5, that is, the required movement of the drive shaft 4. ing. On the other hand, the spring 8A accumulates force due to the movement of the release plate 5 that moves together with the drive shaft 4, and releases the accumulated force by releasing the flange 7A, so the flange 7a instantly reaches the locking portion 2A2. Move works. A vacuum switch (not shown) is closed by an operating shaft 6 that moves together with the collar 7A. In addition, the opening operation of the vacuum switch is performed by moving the drive shaft 4 in the opposite direction to the arrow, and by moving the release plate 5 that moves together with the drive shaft 4, the force of the stored spring 8B is released in the same way as above. This is done by instantaneously releasing the energy using the energy release means.

However, the conventional vacuum switch operating device described above is
As mentioned above, latches, collars, springs, etc. for opening and closing are required, and the disadvantage is that the number of parts is large and assembly and adjustment are time-consuming.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and aims to provide a switch operating device with an extremely simple structure by using an engaging member and a releasing member that are elastically coupled. This is the purpose.

Hereinafter, a switch operating device according to the present invention will be explained based on the drawings. In FIG. 2 illustrating an embodiment of the invention, 1 is a frame of the operating device, 1a is a bearing, 2 is a latch tiltably attached to the bearing 1a, 2a is a first engagement recess, and 2b is a second engagement recess. The engagement recesses 2a and 2b are provided in the upper part of the latch 2 at intervals corresponding to the desired opening/closing stroke of the vacuum switch. 2c is the concave part 2a and 2
This partition wall 2c is set to a depth such that an engaging member, which will be described later and engages with the recessed portion, can move. 2d is a sliding groove, and both ends thereof are formed shallowly. Reference numeral 3 denotes a spring that presses the latch 2, and the latch 2 is constantly pressed by this spring 3. Reference numeral 4 denotes a drive shaft which passes through the lower side of the frame 1 and is movable in the axial direction. A release member 5 is fixed to the end of the drive shaft 4. 5a is the release member 5
The movement of the drive shaft 4 causes the latch 2 to tilt by sliding contact with the sliding groove 2d of the latch 2. Reference numeral 6 denotes an operating shaft for operating the vacuum switch, which is provided movably through the upper side of the frame 1. Reference numeral 7 denotes an engaging member fixed to the end of the operating shaft 6. Reference numeral 7a denotes an engaging portion of the engaging member 7, and the engaging portion 7a and the first and second engaging recesses 2a and 2b form the engaging member 7.
are locked or engaged. A spring 8 elastically connects the release member 5 and the engagement member 7, and the stored force of the spring 8 converts the axial movement of the drive shaft 4 into an instantaneous axial movement of the operating shaft 6. Note that the drive shaft 4 is connected to a drive device (not shown) and is operated by the operation of the drive device. The operating device shown in FIG. 2 is constructed as described above, and has a pair of latches 2, 2 disposed on both sides of the release member 5 and the engagement member 7, and shows the state in which the vacuum switch is closed. There is.

Next, the opening operation of the vacuum switch will be explained based on the operation diagrams shown in FIGS. 3 to 5. 3-5, the latch is shown on only one side for ease of explanation.

FIG. 3 shows a state in which the vacuum switch is closed. In the state shown in FIG. 3, the drive shaft 4 is at the upper limit of the specified movement value, and the sliding end 5a of the release member 5 is in contact with the end of the sliding groove 2d, so the latch 2 is in a tilted state. Further, the spring 8 is in a compressed state even though its stored force is released, and therefore the engaging portion 7a of the engaging member 7 supporting one end of the spring 8 is inserted into the first engaging recess of the latch 2. It is in an engaged state with the upper surface of 2a.

When the drive shaft 4 moves in the direction of the arrow from the state shown in FIG. 3 restores the latch 2 to a position approximately parallel to the axis. On the other hand, the spring 8 for storing force gradually releases its stored force as the drive shaft 4 moves downward, and when it exceeds the free length, it stores a restoring force, and the engaging member 7 comes to engage with the lower surface of the first engagement recess 2a of the latch 2. (4th
(See figure 4) When the drive shaft 4 moves further in the direction of the arrow in Fig. 4, and its movement approaches a specified value, the sliding end 5a of the release member 5 that moves together with the drive shaft 4 gradually becomes shallower. The latch 2 begins to tilt as it comes into contact with the groove 2d. On the other hand, a spring 8 elastically connects the release member 5 and the engagement member 7 when the release member 5 is lowered.
further accumulates restoration power. And the above latch 2
As the tilting progresses further, the first engagement recess 2a
The engagement member 7 is disengaged from the engagement portion 7a, and the engagement member 7 instantly comes into contact with the lower surface of the second engagement recess 2b due to the restoring force stored in the spring 8. (See FIG. 5) The vacuum switch is opened by the instantaneous movement of the operating shaft 6 that moves together with the movement of the engaging member 7. Further, in the closing operation of the vacuum switch, the spring 8 is compressed and stored by the upward movement of the drive shaft 4, and the operation shaft 6 is operated by releasing this stored force, as described above.

In the embodiment shown in FIG. 2 above, a case was explained in which the latch was provided on both sides of the releasing member and the engaging member, but the latch was provided on one side as shown in FIGS. 3 to 5 of the operation explanatory diagram. Also, the same effect as in the above embodiment can be obtained.

Moreover, FIG. 6 is a diagram explaining another embodiment. FIG. 6 shows that an auxiliary shaft 9 is slidably inserted into both the drive shaft 4 and the operating shaft 6 in order to prevent poor engagement due to eccentricity of the engaging member due to the pressing force of the latch provided on one side. ing.

Furthermore, in the above embodiment, the sliding end of the release member is formed in a semicircular shape, but it goes without saying that the operating force of the drive shaft can be reduced by using a rotating contact member such as a roller. Nor. Further, although the above embodiments have been described with respect to a vacuum switch, it goes without saying that the present invention can be applied to other switches.

As described above, according to the present invention, the drive shaft and the operating shaft of the switch are telescopically and elastically connected, and the engagement of the latch with the engaging member that moves together with the operating shaft opens or closes the switch. The closing position is set, and the operating force for operating the operating shaft is stored by the operation of the release member that moves together with the drive shaft, and the engagement by the latch is released. Instantaneous action can be obtained by applying and releasing the force, and effects such as ease of assembly and adjustment can also be obtained.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram for explaining a conventional switch operating device, FIGS. 2 to 5 are diagrams for explaining an embodiment of the present invention, FIG. 2 is a configuration diagram shown in a perspective view, and FIG.
5 to 5 are operation diagrams of FIG. 2, and FIG. 6 is a configuration diagram of another embodiment. In the figure, 2 is a latch, 2a is a first engagement part, 2b
2d is the sliding part, 4 is the drive shaft, 5 is the second engaging part,
6 is a release member, 6 is an opening/closing operation shaft of the vacuum switch, 7 is an engaging member, and 8 is an elastic member. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An engaging member provided at the end of the operating shaft for operating the switch, a release member provided at the end of the drive shaft and arranged to face the engaging member in the axial direction, and a release member provided with the engaging member. A stretchable elastic member that elastically connects the members and transmits the operation of the drive shaft to the operating shaft, and a first and second engaging portion are provided, and one of the engaging portions is connected to the engaging member. a tiltable latch having a sliding portion that engages and locks the operating shaft in one operating position and is in sliding contact with the release member; the latch is in sliding contact with the release member and locks the drive shaft in one operating position is tilted by a required action to disengage one of the first and second engaging parts from the engaging member and move the operating shaft to the other operating position. The operating device for the switch.