RU159211U1 - FREE MECHANISM MECHANISM - Google Patents

Abstract

1. The mechanism of free uncoupling of a circuit breaker, comprising a disconnecting rail, a handle connected to the lever, an axis connected to the side of the rack and a bracket mounted between them on the axis of rotation, characterized in that the axis connecting the side of the rack is stationary, the bracket is made with jumpers and equipped with it the axis of engagement, the axis of rotation is equipped with two springs helically wound on it, arranged to hold the bracket in the off position, with one end of each the spring is made with the possibility of interaction with the jumper of the bracket, and the other end of each of the springs is made with the possibility of interaction with a fixed axis, and the disconnecting rail is made with a ledge with the possibility of interaction with the bracket, and the axis of engagement is made with the possibility of interaction with the lever associated with the handle. 2 . The free release mechanism according to claim 1, characterized in that the springs are wound in different directions.

Description

The utility model relates to electrical engineering, in particular to low-voltage circuit breakers.

The known mechanism of the free trip of the circuit breaker (adopted for the prototype patent of the Russian Federation for utility model No. 65293), containing a handle, lever, two side racks, between which a half-sawed axis with two grooves is installed.

A disadvantage of the known design is the difficulty of manufacturing a half-sawed axis, as well as a clamping spring with a certain bending angle to provide the required position of the half-sawed axis at a certain angle for its engagement with the lever.

The technical task is to create a device that does not require additional settings and is easy to manufacture and assemble, ensuring its maintainability outside the factory.

The technical result is to increase the reliability of the mechanism of free trip.

The problem is solved due to the fact that in the free trip mechanism containing the disconnecting rail, the handle connected to the lever, the side struts connected by the axis and the bracket mounted between them on the rotation axis, the axis connecting the side struts is fixed, the bracket is made with jumpers and equipped with it installed the axis of engagement, the axis of rotation is equipped with two springs helically wound on it, configured to hold the bracket in the off position, with one end of each of the spring is made with the possibility of interaction with the jumper of the bracket, and the other end of each of the springs is made with the possibility of interaction with a fixed axis, the disconnecting rail is made with a ledge with the possibility of interaction with the bracket, and the axis of engagement is made with the possibility of interaction with the lever associated with the handle. The springs are wound in different directions.

The essence of the proposed technical solution is illustrated by illustrations, where

in FIG. 1, 3 and 4 depict the proposed mechanism of free trip in the case of a circuit breaker;

in FIG. 2 - shows the handle, bringing the mechanism into working condition, while:

1 - side racks;

2 - fixed axis;

3 - axis of rotation of the bracket;

4 - bracket

5 - disconnecting rail;

6 - lever;

7 - axis of engagement;

8 - springs;

9 - handle;

10 - ledge;

11 - jumpers.

The free trip mechanism comprises side posts 1 connected by a fixed axis 2. A bracket 4 is mounted between the side posts 1 on the rotation axis 3.

The bracket 4 is made with jumpers 11 and is equipped with a gear axis 7 installed therein.

The axis of rotation 3 is equipped with two springs 8 mounted on it and spirally wound in different directions and arranged to hold the bracket 4 in the off position, with one end of each spring 8 abutting against the bridges 11 of the bracket 4, and the other into the fixed axis 2.

The disconnecting rail 5 is made with a ledge 10 with the possibility of interaction with the bracket 4.

The axis of the engagement 7 is made with the possibility of interaction with the lever 6 associated with the handle 9.

To ensure the operation of the free trip mechanism, it is necessary to cock the circuit breaker.

For this, the handle 9 moves in the direction of the circuit breaker opening (in Fig. 2, in the direction of arrow B).

The lever 6, turning on its axis, interacts with the axis of the gear 7, then presses on the jumper 11 of the bracket 4.

The bracket 4 rotates on the axis of rotation 3 counterclockwise, engages with the ledge 10 of the disconnecting rail 5 and occupies a fixed position along with the axis of the engagement 7, while the lever 6 abuts against the axis of the engagement 7, holding the engagement.

With the automatic operation of the switch, the trip rail 5 turns counterclockwise, the bracket 4 ceases to interact with the ledge 10 of the trip bar 5 and, under the influence of the springs 8, turns clockwise to move the roller 7, while the lever 6 disengages from the bracket 4, and the mechanism is free trip triggered.

The application of the proposed utility model allows you to hold the bracket in the off position, preventing it from turning counterclockwise when the circuit breaker is automatically turned off, and also allows you to safely cock the free trip mechanism itself, which increases the reliability of the free trip mechanism and simplifies its assembly.

Based on the foregoing, the task of creating a device that does not require additional settings and is easy to manufacture and assemble, ensuring its maintainability outside the factory conditions, has been solved.

Claims (2)

1. The mechanism of free uncoupling of a circuit breaker, comprising a disconnecting rail, a handle connected to the lever, an axis connected to the side of the rack and a bracket mounted between them on the axis of rotation, characterized in that the axis connecting the side of the rack is stationary, the bracket is made with jumpers and equipped with it the axis of engagement, the axis of rotation is equipped with two springs helically wound on it, arranged to hold the bracket in the off position, with one end of each Ruzhin adapted to cooperate with a bridge bracket and the other end of each of the springs is adapted to cooperate with a stationary axis, wherein the breaking rack formed with a shoulder for engagement with the bracket, and the gearing axis is adapted to cooperate with a lever associated with the handle. 2. The free release mechanism according to claim 1, characterized in that the springs are wound in different directions.

Images