JPS6226532B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the operating mechanism of a switch.

Generally, the operation mechanism of a switch is based on the rotational force of an electric motor,
The opening and closing operations of the switch contacts are performed using a complex combination of driving forces such as the magnetic force of the electromagnet and the output of the air cylinder mechanism, including gears, cams, and links. It has disadvantages such as being easy to use, expensive, and having a large device.

The purpose of the switch operating mechanism according to the present invention is to eliminate the above-mentioned drawbacks, reduce the number of components, and provide a compact structure.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a vacuum switch, in which a fixed electrode 26 and a movable electrode 27 are arranged facing each other in a vacuum valve 25. is connected to.
This arm 3 is connected to one end of an arm 6 by a fulcrum shaft 20, and the latter arm 6 is configured to move in an arc around the shaft 4, and an opening spring 5 is attached to the other end.
are connected to each other, and the spring force of the spring 5 stores energy in the opening direction of the movable electrode 27 of the vacuum switch 1 via the arms 6 and 3 in the closed state, which will be described later. The opening/closing operation arm 3 and the arm 6 are rotatably connected to a first link 7 by the fulcrum shaft 20, and the first link 7 is connected to a second link 9 coaxially with a roller 8 which is a sliding member. The second link 9 is a movable iron core 1 that reciprocates in the horizontal direction of an electrode stone 24 which is a driving means.
Connected to 0. The electromagnet 24 is connected to the movable iron core 1
A release spring 12 is interposed between 0 and the fixed iron core 11, and an excitation coil 19 is provided. Said roller 8
is pivotably attached to a fixed member (not shown) by a pin 13, and in the open and closed states, the movable iron core 1
It is movably supported on a rail 14 that is held parallel to 0. A notch 14a provided at the tip of the rail 14 is engaged with a locking piece 15 to prevent the rail 14 from tilting. The locking piece 15 is pivotally connected to the fixed member by a pin 16, and includes a torsion coil spring 17 wound around the pin 16. Also, the rail 14 has a spring 1
8, the distal end side is urged to rotate upward. A trip lever 23 is connected to the movable iron piece 22 of the trip electromagnet 21 to constitute a release position, and the tip of this lever 23 is adapted to come into contact with the locking piece 15.

The operating mechanism of the switch configured as above is as follows:
When the coil 19 of the electromagnet 24 is energized in the open state of the vacuum switch 1 shown in FIG. At the same time, the robot moves to the right in the figure on the horizontal rail 14.
As the roller 8 moves, the fulcrum pin 20 moves to the first
The relative angle θ between the first link 7 and the rail 14 is 90 as shown in FIG.
When it becomes smaller than ゜, the spring force of the opening spring 5 acting on the roller 8 acts to push the roller 8 to the right in the figure, and even if the coil 19 is de-energized, the state shown in FIG. 2 is maintained. As a result, the closing latch becomes engaged. In this state, vacuum switch 1
is closed, and the opening spring 5 is energized.

In the state shown in Figure 2, trip electromagnet 2 of the release device
1, the movable iron piece 22 is attracted, and the trip lever 23 connected to the movable iron piece 22 pushes the locking piece 15 to the right in the figure, disengaging the engagement support of the rail 14. This rail 14 is pushed downward by the strong force of the opening spring 5 and the contact spring 2 via the first link 7 and the roller 8, so that it tilts downward. Therefore, as shown in FIG. 3, the vacuum switch 1 is in an open state. This FIG. 3 shows the moment when the poles are opened, and then the release spring 12
The force moves the roller 8 on the rail 14 to the left in the figure, and the rail 14 is constantly pushed upward by the spring 18, and the locking piece 15 is moved by the torsion coil spring 17. Since it is pressed to the left in the figure, when the roller 8 moves to the left after opening and the rail 14 is pushed up, the locking piece 15
is engaged with the notch 14a of the rail 14, and the rail 1
4 is supported horizontally, and the contact opening operation is completed when the contact opening state shown in FIG. 1 is reached.

Note that the trip electromagnet 21 is in the open state shown in FIG.
When energized, the locking piece 15 comes off from the rail 14 and the rail 14 cannot support the closing force, so even if the coil 19 of the electromagnet 24 is energized by the closing command and the movable iron core 10 is attracted. The state shown in Fig. 1 changes to the state shown in Fig. 3, and the free trip function required of the breaker, that is, the breaker can be tripped by the operation of the tripping device even when a closing command is issued. Functionality is ensured.

Although this invention has been described above with reference to an embodiment of a vacuum switch, this invention is not limited to vacuum switches, but can be applied to all types of switches such as oil-filled switches, gas switches, and air switches. can.
Also, regarding the embodiment using an electromagnet as a driving means,
Although described above, the present invention is not limited thereto, and the present invention can use an air cylinder mechanism, a hydraulic cylinder mechanism, an energy storage spring, or the like as a driving force, and can use an appropriate driving means having a member that reciprocates linearly.

As explained above, the operating mechanism of the switch of the present invention includes a locking piece and a release device that support a sliding member such as a roller that is interlocked with a driving means through a link mechanism and that supports the rail so as to move linearly. By tilting the switch, the opening/closing arm connected to the link mechanism opens the switch, and the lower end of the first link pivotally connected to the opening/closing arm is moved linearly by the rail. Because of the conversion, no strain is applied to this drive means, and therefore no force loss or wear due to sliding occurs. Furthermore, even with the operating mechanism having such a structure, the breaker can be pulled out into the container even during a loading command by simply tilting the rail. Furthermore, there is no need to provide a special guide mechanism in the drive section, so it is easy to process, can be constructed with a relatively small number of parts, and can be provided compactly and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a switch showing an embodiment of the present invention in the open state, Fig. 2 is a partially cutaway side view of the switch in the closed state, and Fig. 3 is a partially cutaway side view of the switch in the closed state. FIG. 1...Vacuum switch, 3...Opening/closing operation arm, 5...
Opening spring, 6... arm, 7, 9... link, 8...
Roller (moving body), 10... Movable iron core (member that moves linearly), 14... Rail, 15... Locking piece,
21... trip electromagnet, 24... electromagnet (driving means). Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims] 1 An opening/closing operating arm 3 that supports a movable contact of a switch having a pair of releasable contacts at the upper end and is held movable up and down, and an opening spring 5 that pulls the opening/closing operating arm 3 downward. a first link 7 having one end pivotally connected to the lower end of the opening/closing operation arm 3 and having a sliding member 8 at the other end; A rail 1 that is slidably supported in orthogonal directions and pivotably mounted to be tiltable.
4, a drive device 24 connected to the first link via a second link 9 to swing the first link to slide the sliding member on the rail; A locking piece 15 that locks the rail to support it in a direction substantially perpendicular to the direction of movement of the opening/closing operation arm and rotates the rail to a tilted position upon release thereof, and a locking piece 15 that is in a locked state. a release device for releasing the first link 7 and the rail 14, the relative angle between the first link 7 and the rail 14 is greater than 90° before closing the switch contact, and smaller than 90° upon completion of closing the sliding member. An operating mechanism for a switch, characterized in that it prevents a restoring operation.