CN202676340U

CN202676340U - Relay contact pressure detection mechanism

Info

Publication number: CN202676340U
Application number: CN 201220282971
Authority: CN
Inventors: 宋朝阳
Original assignee: Dongguan Sanyou Electrical Appliances Co Ltd
Current assignee: Sanyou Corp Ltd
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2013-01-16
Anticipated expiration: 2022-06-15

Abstract

Provided is a relay contact pressure detection mechanism. A detection circuit is arranged inside the detection mechanism. The relay contact pressure detection mechanism is characterized in that an inductance coil of a relay A is connected in series with a normally open unit of the relay A and a normally closed unit of a relay B and thereafter is connected with positive and negative poles of a power source; the inductance coil of the relay A is connected in series with a relay to be detected and thereafter is connected with the positive and negative poles of the power source; a light-emitting diode is connected in series with a resistor, the normally closed unit of the relay B, and the normally open unit of the relay A and thereafter is connected with the positive and negative poles of the power source. Compared with traditional technology, the relay contact pressure detection mechanism of the utility model is advantageous in simple structure and reasonable design; with the two auxiliary relays added, a circuit can automatically judge whether contact pressure is qualified or nor, thereby greatly reducing workload of detection personnel in detection, and at the same time, automatic detection is adopted, which enables more accurate detection results.

Description

A kind of relay tip pressure detection mechanism

Technical field

The utility model relates to the electrical equipment detection field, and is a kind of for detection of relay tip pressure normal testing agency whether specifically.

Background technology

Relay is the automatic switch element with isolation features, and widespread use and remote control, remote measurement, communication, automatic control, automobile in electromechanical integration and the power electronic equipment, are one of most important control elements.

Contact between the moving contact that relay relies on movable contact spring and the stationary contact with separate, reach the purpose that its circuit opens and closes, relay life is a very important project considering relay performance, and contact pressure is the important parameter that directly affects life of product, and the accurate judgement of docking point pressure size just becomes very crucial factor.

When real work, must keep certain contact pressure between its contact of relay, otherwise the job stability of relay will be subject to very impact, specifically when vibrations occuring or be subject to the external force collision, not enough such as contact pressure, all very easily separate between relay tip, cause circuit to disconnect, the circuit that uses this relay and the job stability of equipment are caused fine impact.

Because the contact pressure of relay plays an important role to the job stability of relay, thus each large relay production firm after the relay assembling is complete, all can the contact pressure of relay be detected, whether qualified to judge it.

Present detection relies on pure manual inspection, its concrete steps are: relay is connected in series mutually with pilot lamp and power supply, the closed rear indicator light of relay tip is bright, testing staff's working pressure meter then, in the insertion of manometric test section and relay tip, rely on staff that pressure gauge is exerted pressure, at this moment, when whether the testing staff needs with the naked eye limit observation relay tip to disconnect (being that viewing lamp is light on and off), also need constantly to observe the pressure gauge registration, thereby judge whether contact can reach corresponding pressure value, satisfies design requirement.

Although the method is simple, but because adopt pure manual inspection, its detection efficiency is low, and needs to arrange a large amount of personnel, cause waste of human resource, when detecting, because of shake, the error of staff, and human eye need to be observed contact and pressure gauge simultaneously simultaneously, so usually misunderstanding is judged in generation, specification product are judged to be defective, it is qualified that substandard product is judged to be, and the accuracy of its detection is subject to very large restriction.

The utility model content

The purpose of this utility model is, overcomes the traditional relay contact pressure and can only rely on the existing deficiency of pure manual inspection, provides a kind of easy to use, simple to operate, and the accurate relay tip pressure detection mechanism of easily judging of testing result.

The utility model is for realizing its purpose, and the technical scheme that adopts is: a kind of relay tip pressure detection mechanism, be provided with testing circuit in the testing agency, and it is characterized in that:

Be connected on the power positive cathode after the normally closed units in series of often opening unit and relay B of the telefault of relay A and relay A;

The telefault of relay A also with after relay to be measured is connected is connected on the both positive and negative polarity of battery;

The normally closed unit of light emitting diode and resistance and relay B, relay A often open units in series after be connected on the power positive cathode;

Connect on the power positive cathode after the normally closed units in series of diode and relay A;

Described diode is used for stoping short circuit;

The telefault of relay B be connected on the power positive cathode after the pressure gauge contact is connected;

The telefault of relay B also with after the normally closed units in series of relay A is connected on the power positive cathode.

Principle of work of the present utility model is: carry out pressure at pressure gauge first and limit, product is plugged on the measurement jig, and it three kinds of states can occur in testing process.

State one: when contact pressure during greater than limit value, product is qualified, and namely the pressure gauge contact disconnects first, when relay tip to be measured did not disconnect, this moment, the telefault loop of relay B disconnected, and product disconnects, the closed conducting of normally closed point, the telefault of relay A does not change, LED lamp loop conducting this moment, lamp is bright, at this moment, continue to increase such as pressure gauge, contact disconnects, the LED lamp still keeps lamp bright, erroneous judgement can not occur.

State two: when contact pressure during less than limit value, product is defective, and namely contact disconnects first, and this moment, LED lamp loop disconnected, and lamp goes out.

In sum, when the user uses the utility model that relay tip pressure is detected in reality, only need to observe the LED lamp and can judge accurately whether contact pressure is qualified.

Conventional art of the present utility model is compared, it is simple in structure, reasonable in design, adding by two auxiliary relays, conclude so that but whether circuit automatic butt point pressure is qualified, greatly alleviated the workload of testing staff when detecting, simultaneously, adopt automatically and detect, so that testing result is more accurate.

Description of drawings

Accompanying drawing 1 is circuit connection diagram of the present utility model, also is that summary is with scheming.

Accompanying drawing 2 is that the utility model is in for the moment circuit diagram of state.

Accompanying drawing 3 is the utility model circuit diagrams when being in state two.

Dotted lines is the utility model current trend schematic lines.

RELAY1 is the telefault of relay A;

RELAY2 is the telefault of relay B;

RELAY3 is relay to be checked;

B(NC-side) be the normally closed unit of relay B;

A(NC-side) be the normally closed unit of relay A;

A(NO-side) be relay A often open the unit.

Embodiment

Now reach by reference to the accompanying drawings embodiment the utility model is made further instruction.

Embodiment:

A kind of relay tip pressure detection mechanism is provided with testing circuit in the testing agency, it is characterized in that:

RELAY1 and A(NO-side) and B(NC-side) be connected on the power positive cathode after connecting;

RELAY1 also with after RELAY3 connects is connected on the both positive and negative polarity of battery;

Light emitting diode and resistance and B(NC-side), A(NO-side) be connected on the power positive cathode after connecting;

Diode and A(NC-side) connect on the power positive cathode after connecting;

Described triode is used for stoping short circuit;

RELAY2 be connected on the power positive cathode after pressure gauge is connected;

RELAY2 also with A(NC-side) be connected on the power positive cathode after connecting.

The above, only be better enforcement of the present utility model, be not that the utility model is done any pro forma restriction, any those skilled in the art may utilize above-mentioned technology contents to be changed or be modified to the equivalent embodiment of equivalent variations, at this, all the technical solution of the utility model contents that do not break away from, just foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does.

Claims

1. a relay tip pressure detection mechanism is provided with testing circuit in the testing agency, it is characterized in that: be connected on the power positive cathode after the normally closed units in series of often opening unit and relay B of the telefault of relay A and relay A; The telefault of relay A also with after relay to be measured is connected is connected on the both positive and negative polarity of battery; The normally closed unit of light emitting diode and resistance and relay B, relay A often open units in series after be connected on the power positive cathode; Connect on the power positive cathode after the normally closed units in series of diode and relay A; The telefault of relay B be connected on the power positive cathode after pressure gauge is connected; The telefault of relay B also with after the normally closed units in series of relay A is connected on the power positive cathode.