Electric appliance working status inductor of automatic three-position switch

Abstract

The invention discloses an electric appliance working status inductor of an automatic three-position switch, belonging to the technical field of a low voltage appliance and comprising a power output shaft, a transmission mechanism, a rotary shaft and an indication member, wherein the transmission mechanism is connected with the power output shaft, the rotary shaft is connected with the transmission mechanism, and the indication member is connected with the rotary shaft. The inductor is characterized by also comprising a drive part for driving the rotary shaft to move and a rotary shaft stabilization mechanism for ensuring the stability of the rotary shaft, wherein the drive part is arranged on the transmission mechanism, and the rotary shaft stabilization mechanism is matched with the rotary shaft; one side at the lower part of the rotary shaft is provided with a drive part groove, and a working face is formed on the outer wall of the rotary shaft; and the drive part extends in the drive part groove, and the rotary shaft stabilization mechanism is matched with the working face. The inductor in the invention has the advantages of ensuring the stable movement of the rotary shaft, enabling the indication member fixed with the rotary shaft to accurately reflect the contact state in real time, providing real and credible indication information for operators and maintainers, and being capable of completely eradicating potential safety hazards.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an electrical working state indicating device for a three-position automatic transfer switch. Background technique [0002] In the field of electrical technology, the three-position automatic transfer switch has three working states: one is the normal power on state (usually called "commonly ON"); the other is the standby power on state (usually called "standby ON"); The common power supply and the backup power supply are both in a disconnected state (usually called "disconnected OFF"). [0003] The electric appliance of the known three-position automatic transfer switch is composed of two groups of independent units, and each group of units includes a contact system, an arc extinguishing system and a transmission device, which are respectively used to control the connection and disconnection of the normal power supply or the standby power su...

AI Technical Summary

Problems solved by technology

Although this kind of electrical working state indicating device has the advantage of simple structure, it has two shortcomings in the actual use process: one is that it is difficult to correctly reflect the working state of the dynamic and static contacts, and there is even the risk of giving wrong instructions , because the closing or opening action of the moving and static contacts is completed instantaneously, while the indicator follows the motor to rotate at a constant speed, so the indicator often does not correctly reflect the real status of the contact

Especially after the contact is welded, the motor rotates to compress the main contact spring, and the spring is released after passing the dead point (dead point) of the spring bracket, and drives the transmission mechanism to open the main contact. , the main contact does not move, it is still in the closed state, and the spring cannot be released in place, but in the process, the indicator always rotates with the rotation of the motor until the motor stops due to the mechanism being stuck due to the welding of the contacts , and at this time, the indicating arrow (also known as the indicating sign) of the indicating piece has substantially moved away from the closing indicating position, and has even pointed to the disconnecting position, and the indicating piece made a wrong indication, that is, it did not reflect the true state, thus providing the operator and maintenance personnel with the wrong information of the switch state, and then burying a serious safety hazard for the operation and maintenance; second, the indication of the indicator is ambiguous, which confuses the judgment of the operator, because when After the closing or opening action of the contact is completed, due to the instability of the stop time of the motor itself, the rotation stop time of the rotating shafts of the transmission gears at all levels driven by the motor is also unstable, resulting in the The position indicated by the indicator on the rotation axis deviates from the correct position

Similarly, due to factors such as vibration during transportation and use, there are also direct deviations of the indicator set on the rotating shaft, resulting in the indicator not being able to point to the correct position and not correctly reflecting the electrical work of the three-position automatic transfer switch. The exact information of the state, but only a general or even ambiguous indication that is easy to make the operator elusive

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