CN215728644U

CN215728644U - Over-travel testing device for electromagnetic switch

Info

Publication number: CN215728644U
Application number: CN202121469700.7U
Authority: CN
Inventors: 赵培和; 王智美
Original assignee: Wuhu Xingshen Auto Parts Co ltd
Current assignee: Wuhu Xingshen Auto Parts Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-02-01
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses an over-travel testing device of an electromagnetic switch, which is fixedly provided with the electromagnetic switch, wherein the electromagnetic switch is provided with two terminals, the two terminals of the electromagnetic switch are respectively connected with two contacts, the two contacts are connected with an indicator lamp and a power supply in series through a lead, and an upper limit testing movable iron core and a lower limit testing movable iron core are selectively installed in the electromagnetic switch. The utility model is a special device for detecting the overtravel of the electromagnetic switch, and the device has the advantages of rapid detection, reliability, high efficiency, low cost and the like.

Description

Over-travel testing device for electromagnetic switch

Technical Field

The utility model relates to the technical field of detection, in particular to the field of an over-travel detection device of an electromagnetic switch of a starter.

Background

The electromagnetic switch is one of the key parts of the automobile starter, and is responsible for controlling the on-off function (function II) of the main loop of the starter motor in addition to controlling the meshing of the pinion of the starter and the flywheel of the engine (function I). And function ii implementation has a key parameter: the overtravel, the control and the detection of the overtravel are directly related to the reliability and the service life of the switch, the overtravel is too large, the attraction force required to be provided by the coil is also larger, the switch is not easy to power off, the overtravel is too small, the contact force of the contact is small, the contact is unreliable, electric arcs are easily generated, the contact is ablated, and the switch fails in early stage. However, at present, there is no device capable of reliably and effectively performing over-travel test on the electromagnetic switch, so that the reliability of a designed product cannot be reliably verified.

Disclosure of Invention

The utility model aims to solve the technical problem of realizing a detection device capable of quickly, reliably and efficiently carrying out over-travel reliability on an electromagnetic switch.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides an electromagnetic switch over-travel testing arrangement, the device is fixed with electromagnetic switch, electromagnetic switch is equipped with two terminals, two terminals of electromagnetic switch are connected with two contacts respectively, two the contact is established ties through the wire has pilot lamp, power, iron core is moved in the installation upper limit test of selectivity and lower limit test in the electromagnetic switch.

And the thickness difference of the contact part of the upper limit test movable iron core and the lower limit test movable iron core is the upper and lower limit difference when the electromagnetic switch normally moves to the limit position.

The difference between the upper limit and the lower limit is 0.4 mm.

The utility model is a special device for detecting the overtravel of the electromagnetic switch, and the device has the advantages of rapid detection, reliability, high efficiency, low cost and the like.

Drawings

The following is a brief description of the contents of each figure and the symbols in the figures in the description of the utility model:

FIG. 1 is a schematic diagram of the operation of an over-travel testing device for an electromagnetic switch;

FIG. 2 is a schematic diagram of an electromagnetic switch to be tested;

FIG. 3 is a schematic diagram of a normal movable iron core structure;

FIGS. 4 and 5 are schematic diagrams of movable iron core testing structures

The labels in the above figures are: 1. an electromagnetic switch; 2. and a terminal.

Detailed Description

The following description of the embodiments with reference to the drawings is provided to describe the embodiments of the present invention, and the embodiments of the present invention, such as the shapes and configurations of the components, the mutual positions and connection relationships of the components, the functions and working principles of the components, the manufacturing processes and the operation and use methods, etc., will be further described in detail to help those skilled in the art to more completely, accurately and deeply understand the inventive concept and technical solutions of the present invention.

The over-travel testing device of the electromagnetic switch 1 is fixed with the electromagnetic switch 1, two terminals 2 of the electromagnetic switch 1 are respectively connected with two contacts, the two contacts are connected with an indicator lamp and a power supply in series through a wire, so that when the electromagnetic switch 1 is switched on, the indicator lamp and the power supply are switched on to form a series circuit, the indicator lamp is turned on, when the electromagnetic switch 1 is switched off, the indicator lamp and the power supply are switched off, and the indicator lamp is turned off.

The upper limit test movable iron core and the lower limit test movable iron core are selectively installed in the electromagnetic switch 1, namely, the upper limit test movable iron core (shown in figure 5) and the lower limit test movable iron core (shown in figure 4) are installed once respectively, and the thickness difference of the contact parts of the two test movable iron cores is the upper limit difference and the lower limit difference of the normal movable iron core of the electromagnetic switch 1 running to the limit position, namely 0.4 mm. The upper limit test movable iron core and the lower limit test movable iron core are two limit movable iron cores which are designed according to the product overtravel requirement in advance, the main contact of the electromagnetic switch 1 of the upper limit test movable iron core is not communicated, the main contact of the lower limit test movable iron core is communicated, the qualitative measurement similar to GO/NG is carried out, and then the manual observation indicator lamp is matched to realize the test of the electromagnetic switch 1.

The testing principle is that when the normal movable iron core runs to the limit position, the overtravel is 4.3 +/-0.1-3 +/-0.1 (1.1-1.5), the testing movable iron core with the length of 1.1mm in fig. 4 runs to the limit position, the 30 and 40 terminals 2 can be conducted, the indicating lamp can be lightened, the overtravel is more than or equal to 1.1mm, the product is qualified, otherwise, the indicating lamp can not be lightened, the overtravel is less than 1.1mm, similarly, when the testing movable iron core with the length of 1.5mm in fig. 5 runs to the limit position, the 30 and 40 terminals 2 can be conducted, the indicating lamp can be lightened, the overtravel is more than 1.5mm, the product is unqualified, otherwise, the overtravel is less than or equal to 1.5mm, three states of the overtravel of the product are rapidly, reliably and efficiently identified, one of the overtravel is more than 1.1mm, the other two of the overtravel are unqualified states, the three of the overtravel states are between 1.1 and the three are qualified states.

The utility model has been described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the specific implementation in the above-described manner, and it is within the scope of the utility model to apply the inventive concept and solution to other applications without substantial modification.

Claims

1. The utility model provides an electromagnetic switch over travel testing arrangement, the device is fixed with electromagnetic switch, electromagnetic switch is equipped with two terminals, its characterized in that: two terminals of the electromagnetic switch are respectively connected with two contacts, the two contacts are connected with an indicator lamp and a power supply in series through a lead, and an upper limit test movable iron core and a lower limit test movable iron core are selectively installed in the electromagnetic switch.

2. The electromagnetic switch over-travel testing device of claim 1, wherein: and the thickness difference of the contact part of the upper limit test movable iron core and the lower limit test movable iron core is the upper and lower limit difference when the electromagnetic switch normally moves to the limit position.

3. The electromagnetic switch over-travel testing device of claim 2, wherein: the difference between the upper limit and the lower limit is 0.4 mm.