JPS6337710Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a vacuum cutter and disconnector, and more particularly to an insulated operating plate for turning on and off the vacuum cutter and disconnector.

Prior Art In order to reduce the size and weight of vacuum shields and disconnectors, the applicant has recently proposed a vacuum shield and disconnector with a simple configuration that allows for loading and unloading without the use of complicated link mechanisms. In the case of this vacuum interrupter, the end of the stud bolt connected to the movable lead rod of the vacuum interrupter is connected to one side of an insulated operation plate that is swingably provided around a supporting shaft. A charging cam roller is provided on the other side of the plate, and a charging cam that rotates in conjunction with the energy accumulating means is provided on this roller so that it can be freely engaged and detached and can be pressed against it. In addition, the insulated operation plate is equipped with a cutting spring.

However, the above-mentioned insulated operation board had the following problems. In other words, the distance between the head of the stud bolt connected to the movable lead rod of the vacuum interrupter and the closing cam rollers (these are mounted on both sides of the insulated operation plate as described above) is the insulation distance shown in Figure 6l. (to the ground), and if it were a simple insulated operation board, the dimension in the X direction shown in the figure would be very large, which would be an obstacle to miniaturizing vacuum shields and disconnectors.

In addition, since the roller for the input cam operates at a certain input speed under a large load from a shear spring or pressure spring, the bearing of the roller provided on the insulated operation plate requires a certain degree of strength. The dimensions of the bearing section become larger, and the weight of the insulated operation plate increases. Therefore, there was a problem in that more energy was required to increase the input speed.

Purpose of the invention The present invention was proposed in order to solve the above-mentioned problems.It is an insulated operation plate that can reduce the insulation distance between the head of the stud bolt and the roller for the input cam, and can naturally reduce the weight accordingly. The purpose of the present invention is to provide a vacuum breaker equipped with the following.

Summary of the invention The vacuum interrupter according to the invention houses a vacuum interrupter in an insulating frame, and pivots the head of a stud bolt to which a movable lead rod is connected so as to be able to swing freely about a pivot point. The insulated operation plate is connected to one side of the insulated operation plate, and the insulated operation plate is actuated by a shear or a cutting spring, and the other side of the insulated operation plate is pivotally supported by a roller for the input cam. A closing cam rotatably operated by a mechanism is configured to be able to be pressed into and separated from each other, and the insulated operation plate is composed of an operation plate main body and a roller mounting plate that is integrally connected to the main body using an arbitrary fixing means. A recess is formed in the operation plate main body, the head of a stud bolt inserted through a shaft hole provided in the operation plate main body is positioned in the recess, and an annular groove is formed on the outer periphery of the annular wall forming the recess. death,
An annular rib protruding from one side of the roller mounting plate is fitted into the annular groove, a reinforcing rib is protruding from the other side of the roller mounting plate, and the reinforcing rib is used as a bearing plate for the input cam roller. It is characterized by being pivotally supported.

Embodiment Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Figs. 3 to 5 show the schematic structure of a vacuum shield breaker. The explanatory diagram, FIG. 6, is an enlarged view of the insulated operation plate, which is the gist of the present invention.

As shown in FIG. 2, an operating plate 3 is rotatably attached to an insulating frame 1 constituting the main body of the vacuum cutter via an operating shaft 2. As shown in FIG. The operation plate 3 is
Insulating polyester brimics are used to serve as an insulating member for maintaining insulation between the movable lead rod 6 and the input cam 15, which will be described later. An arm 4 is formed on the top of the operation plate 3, and the upper end of the arm 4 is in contact with an auxiliary switch 9 fixed to the insulating frame 1.

On one side (left side in FIG. 2) of this operation plate 3, the ends of the movable lead rods 6 of the three vacuum interrupters 5 arranged horizontally are connected via pressure springs 7 and stud bolts 8. The direction of the axis of the movable lead rod 8 substantially coincides with the rotating direction (horizontal direction) of the operation plate 3. These three vacuum interrupters 5 are attached to the insulating frame 1 via stays 10, and a fixed side terminal 11 and a movable side terminal 12 are arranged from each vacuum interrupter 5 to the outside of the insulating frame 1. There is.

And, between these vacuum interrupters 5, a wedge spring is provided as a biasing means 13 for biasing the operation plate 3 toward the opposite side of the vacuum interrupter 5 to cause the vacuum interrupter 5 to collapse. It is being This urging means 13 is inserted into a guide rod 14 fixed to the stay 10 to prevent deflection due to its own weight and as a guide, and is inserted between the stay 10 and the operation plate 14.
It is provided between.

On the other hand, on the other side of the operation plate 3 (on the right side in FIG. 2), there is a rotatable input cam 15 that presses the operation plate 3 toward the vacuum interrupter 5 side against the urging force of the urging means 13 to perform input. It is set in. As shown in FIG. 4, this charging cam 15 has an inclined portion 16 on its side surface, and its side surface abuts against a roller 17 rotatably provided on the operation plate 3.

Since the insulated operation plate 3 constitutes one of the gist of the present invention, it will be explained in more detail with reference to FIGS. 3 and 6. The operation plate 3 is composed of an operation plate main body 3a and a roller mounting plate 3b. However, both are integrally connected using any means, for example, bolts 47.
A recess 48 is formed in the operation plate main body 3a and is open on the roller mounting plate 3b side. This recess 4
The head 8a of the stud bolt 8, through which the annular medal 53 is inserted through the shaft hole 49 provided at the bottom of the bolt 8, is located in the recess 48.

An annular groove 51 is provided on the outer periphery of the annular wall 50 forming the recess 48 . On the other hand, roller mounting plate 3
An annular rib 52 protrudes from one side of b and is fitted into the annular groove 51 to close the recess 48. A bearing plate 3c is made to protrude from the other side of the roller mounting plate 3b, and the bearing plate 3c also serves as a reinforcing rib.
A charging roller 17 is pivotally supported on this. Therefore, since the roller mounting plate 3b acts as an insulating cover and seals the recess 48, the head 8a of the stud bolt 8 is completely closed, the insulation distance (creepage) is extended, and the dimension with the charging roller 17 is increased. l can be made as small as possible. Moreover, by making the bearing plate 3c also serve as a reinforcing rib, its strength is improved, and an increase in the weight of the operation plate 3 can be suppressed.

Next, since the input of the vacuum interrupter 5 must be performed at a certain speed, the energy storage means 18 is used to store energy for the rotation of the input cam 15.
is connected to the input cam 15. Energy storage means 18
is provided on the right side of the input cam 15 in FIG. 2, and its structure will be explained based on FIG. 3. A motor 19 is fixed to the insulating frame 1, and the motor 1
An eccentric cam 20 is integrally attached to the output shaft 9. On the other hand, the insulating frame 1 includes a bearing 26,
Thrust bearing 25 and one-way clutch 2
4, the rotation shaft 21 is rotatable only in the direction of the arrow.
The swing arm 22 is swingably attached to the rotating shaft 21 via a one-way clutch 28, and its tip engages with the eccentric cam 20. That is, the eccentric cam 20 is rotatably fitted into a notch 23 formed at the tip of the swinging arm 22, and the swinging arm 22 swings about the rotation shaft 21 by the rotation of the eccentric cam 20. I'm starting to do that.

Note that, like the one-way clutch 26, the one-way clutch 28 also has the function of rotating the rotating shaft 21 only in the direction of the arrow. In addition, the rotating shaft 21
An eccentric cam 27 is integrally attached to the housing, and the eccentric cam 27 is rotatably fitted into the closing spring hook 30 via a bearing 29.
The closing spring hook 30 is attached to the insulating frame 1 via the closing spring 31.
always has a tensile force applied to it. The input cam 15 is attached to one end of the rotating shaft 21 configured in this manner.

Further, the closing operation mechanism section 32 of the vacuum chamber disconnector is constructed as follows. That is, as shown in FIG. 3, a closing latch 34 having a notch 33 is attached to the rotating shaft 21, and a closing hook 35 that comes into contact with the notch 33 to stop the rotation of the closing latch 34 is rotatably provided. It is being In the figure, 36
37 is a spring that urges the end of the closing hook 35 toward the notch 33; 37 is a closing solenoid that pulls off the notch 33 and the end of the closing hook 35 to close the vacuum interrupter 5; and 38 is a closing solenoid. This is a limit switch that stops the rotation of the motor 19 at the same time as the rotation of the rotating shaft 21 is stopped.

Furthermore, the shrinking operation mechanism of the vacuum interrupter 5 is constructed as follows. As shown in FIG. 3, a shaft 40 is rotatably provided on the other side of the operation plate 3, and one end of the shaft 40 engages with a roller 41 provided on the operation plate 3. Manual trip 4
2 is fixed, and a shear cutting solenoid 43 for rotating a shear cutting shaft 40 is attached to the other end. In the figure, 45 is a spring, and 46 is a stopper. Note that 44 is a projection that comes into contact with a stopper (not shown) to stop the rotation of the operation plate 3.

Next, the operation of the vacuum shield disconnector will be explained. To turn on the vacuum interrupter 5, the motor 19 is rotated in advance to store energy. When the motor 19 is rotated, the eccentric cam 20 rotates, causing the swinging arm 22 to swing, and the one-way clutches 28 and 24 work to decelerate the rotating shaft 21 and rotate it in the direction of the arrow. Then, in FIG. 4, the contact position of the roller 17 against the charging cam 15 changes from A ₁ to B _{1 shown by the solid line (storage range), and at the position of B 1 ,} the charging latch 34 and the charging hook 35 are closed. The action stops the rotation of the input cam 15, and at the same time, the action of the limit switch 38 stops the rotation of the motor 19. At this time, the T point of the eccentric cam 27 moves from the position A ₂ shown in a of FIG. 5 to the position B ₂ shown in b of FIG.
It rotates to the position (slightly to the left of C on the opposite side of A ₂ ), the closing spring 31 is pulled, and the energy storage is completed. After this, when the end of the closing hook 35 is removed from the notch 33 by the closing solenoid 37, the biasing force of the closing spring 31 moves the eccentric cam 27 from the _B2 position shown in FIG. Rotate to the _A2 position shown.

At this time, the contact position of the roller 17 against the input cam 15 is as shown by the broken line (release range) in FIG.
The state changes from B ₁ to A ₁ and the roller 17, that is, the operation plate 3 is pushed toward the vacuum interrupter 5 against the biasing force of the biasing means 13, and the application of the vacuum interrupter 5 is completed. When the roller 17 reaches the _A1 position of the input cam 15, there is no slope 16 at this position, so no force is exerted to press the operation plate 3, but the manual trip 4, which is biased by the spring 45,
2 contacts the roller 41 and locks the operation plate 3, so that the closed state of the vacuum interrupter 5 is maintained.

Conversely, in order to break the vacuum interrupter 5, the break shaft 40 is activated by the break solenoid 43.
By rotating the lever in the direction of the arrow to disengage the manual trip 42 and the roller 41, the biasing means 13
The operation plate 3 is moved to the vacuum interrupter 5 by the urging force of
Rotate in the opposite direction to complete the shear cutting. If the shroud solenoid 43 cannot be used due to a malfunction, the manual trip 42 can be pushed from the outside in the direction of the arrow.

Note that the energy accumulating means is not limited to that shown in this embodiment, and various structures can be considered. Furthermore, the number of vacuum interrupters is not limited to three.

Effects of the Invention As explained above, according to the vacuum interrupter of the present invention, an insulated operating plate having a charging roller and connected to a movable lead rod of a vacuum interrupter is rotatably supported, and A shear spring acts on the insulated operation plate, and a rotatable input cam linked to the input operation mechanism is connected to the input roller and can be separated from the input roller to input or disconnect the vacuum interrupter. Therefore, the structure of the insulated operation plate is of course more compact and simpler than the conventional loading means using a complicated link mechanism. The head of the stud bolt connected to is exposed, and the recess is sealed with a roller mounting plate that also serves as an insulating cover. Since the recess is sealed, the creepage distance between the closing cam roller provided on the roller mounting plate and the head of the stud bolt is extended, and the dimension 1 therebetween can be reduced, and the distance in the X direction of FIG. 6 can be reduced. The size is reduced, which greatly contributes to the miniaturization of vacuum shields and disconnectors.

Furthermore, since the bearing plate of the input cam roller provided on the other side of the roller mounting plate also serves as a reinforcing rib, its strength can be improved without increasing the overall weight of the insulated operation plate, and therefore it uses less energy. It is possible to increase the charging speed by rotating the operation plate, and it is also possible to sufficiently withstand the load applied to the bearing portion of the charging cam roller.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front view of a vacuum shield breaker, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Figs. 3, 4, and 5. 6 is an explanatory diagram showing the schematic structure of the vacuum shield breaker, and FIG. 6 is an enlarged view of the insulating operation plate. 2... Operating shaft, 3... Operating plate, 3a... Operating plate main body, 3b... Roller mounting plate, 3c... Bearing plate serving as reinforcing rib, 5... Vacuum interrupter, 6... Movable lead, 8... Stud bolt, 8a... head, 13... biasing means, 15... closing cam, 18
... Energy storage means, 48 ... Recess, 49 ... Shaft hole, 5
0... annular wall, 51... annular groove, 52... annular groove.

Claims (1)

[Scope of utility model registration request] An insulated operation in which a vacuum interrupter is housed in an insulating frame, and the head of a stud bolt connected to its movable lead rod is swingably supported on a shaft support, and a sash or break spring is applied. A roller for a charging cam is interlocked and connected to one side of the plate, and a roller for a charging cam is pivotally supported on the other side of the insulated operation plate, and a charging cam rotated by an energy storing means is configured to be able to be pressed against and separated from the roller. , the insulated operation plate is composed of an operation plate main body and a roller mounting plate integrally connected to the main body using an arbitrary fixing means, and a recess is formed in the operation plate main body, and a recess is formed in the operation plate body. positioning the head of a stud bolt inserted through the provided shaft hole in the recess, forming an annular groove on the outer periphery of the annular wall forming the recess;
An annular rib protruding from one side of the roller mounting plate is fitted into the annular groove to close the recess, and a bearing plate that also serves as a reinforcing rib is protruded from the other side of the roller mounting plate. A vacuum disconnector characterized by being pivoted.