Gas pressure sensor assembly structure

Abstract

The invention discloses a gas pressure sensor assembly structure which comprises a steel jacket adopting a barrel-shaped structure with a closed top end, wherein an injection molding hole which extends outwards is formed in the tail end of the steel jacket; the barrel wall on the edge of the injection molding hole in the steel jacket is folded outwards to form a folded edge. According to the gas pressure sensor assembly structure, a wavy continuous curve is formed on the periphery of the folded edge; the steel jacket subjected to injection molding and packaging is coated with a plastic rod, and the steel jacket and the plastic rod form a coaxial integral structure; the wavy continuous curve structure on the periphery of the folded edge can form a stable stress structure between the interior of the plastic rod and a coating plastic after injection molding and packaging, so that the steel jacket is effectively prevented from rotating in the plastic rod; the outwardly folded edge also can be used for effectively preventing the steel jacket from being pulled out from the plastic rod.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to an assembly structure of an air pressure sensor that can avoid displacement of a steel sleeve during injection molding, thereby improving the precision of sensor products. Background technique [0002] The air pressure sensor is a sensor for measuring the speed of each wheel of the vehicle with air brake as the braking method, and is an indispensable key component in the air brake ABS system. [0003] The assembly structure of the air pressure sensor includes: a steel sleeve, which is in the shape of a cylindrical structure with a closed top, and an outwardly extending injection port is provided at the end. In the production of air pressure sensors, it is necessary to insert the steel sleeve into the injection mold for injection molding, so that the steel sleeve is injected and encapsulated in the plastic rod to form a sensor structure, and the lead wire passes through the plasti...

AI Technical Summary

Problems solved by technology

In the production of air pressure sensors, it is necessary to insert the steel sleeve into the injection mold for injection molding, so that the steel sleeve is injected and encapsulated in the plastic rod to form a sensor structure, and the lead wire passes through the plastic formed by the package to connect with the device in the steel sleeve. Since the steel sleeve and the plastic covering it are only combined by friction, the steel sleeve will be separated from the plastic when an external force is applied, so the steel sleeve is easy to rotate in the plastic rod, or pulled out from the plastic rod under the action of external force, Cause damage to the sensor structure, or affect the detection accuracy of the sensor

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