Electrode connecting device of gas sensor

Abstract

The invention discloses an electrode connecting device of a gas sensor. The device comprises a sensor component and a wiring harness connecting component, wherein the sensor component comprises a hexagon support seat, and a chip arranged in the hexagon support seat, two ends of the chip extend out of the hexagon support seat, one end of the chip extends into the wiring harness connecting component, the wiring harness connecting component comprises an electrode terminal arranged on an outer ring of the chip, and a ceramic clamping piece arranged on the outer ring of the electrode terminal, a first arched bulge is arranged on the electrode terminal, near an end part of the chip, the chip is clamped by the first arched bulge, the electrode terminal is provided with a second arched bulge, and the chip is clamped by the second arched bulge; and the electrode terminal is made of high nickel alloy material. Each electrode terminal is provided with the two arched bulges, the contact between one arched bulge and the electrode of the chip can be kept, and the chip can be fixed by the other arched bulge. When the sensor is vibrated and shocked, elastic buffering protection can be provided to the chip by the elasticity of the arched bulges, the chip can resist the vibration and shock, and simultaneously the electrode is kept contacted without separation.

Description

technical field [0001] The invention relates to an automobile engine tail gas detection device, in particular to an electrode connection device of a gas sensor, belonging to the field of engine tail gas emission control systems. Background technique [0002] The gas sensor is installed in the engine exhaust system to sense the concentration of exhaust gas and realize the closed-loop control of the engine. The core component of the gas sensor is a chip made of ceramic material. The chip works in the exhaust environment and reflects the exhaust concentration through the signal output generated internally. [0003] At present, the chip electrode of the gas sensor is usually in direct contact with the electrode terminal of the wire, so as to realize signal transmission. Since the gas sensor works in a high temperature and vibration environment, it is necessary to ensure that the sensor electrodes are in firm contact and the chip is not easily damaged by thermal stress and vibra...

AI Technical Summary

Problems solved by technology

This assembly structure not only requires the contact between the ceramic chip 2 and the electrode terminal 1 to be very firm and tight, but also the chip 5 has no elastic buffer protection, and the chip 5 is easily broken and damaged when it is subjected to vibration and impact, or when the electrode is stretched due to high temperature changes.

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