Contact terminal of nitrogen-oxygen sensor

Abstract

The utility model discloses a nitrogen oxygen sensor contact terminal, which comprises a terminal main body, the outer wall of the terminal main body is provided with an arc-shaped bend, the outer wall of the terminal main body is provided with a first R angle and a second R angle, one end of the terminal main body is provided with a fixed bend, and the other end of the terminal main body is fixedly connected with a wire pressing sleeve. According to the utility model, through the arrangement of components such as the fixed bend, the arc-shaped bend and the inverted buckle, one end of the terminal main body can be hung on the outer wall of the ceramic chip through the fixed bend, the inverted buckle is inserted into the connecting groove, and the convex part of the arc-shaped bend can be in contact with and extrude the surface of the ceramic chip during installation, so that the firm connection of the inverted buckle in the connecting groove can be ensured; therefore, the installation reliability of the terminal main body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogen oxygen sensor technical field especially relates to nitrogen oxygen sensor contact terminal. BACKGROUND

[0002] Nitrogen oxygen sensor is a kind of sensor for detecting the content of nitrogen oxide in engine exhaust, it is mainly used in automobile detection industry, belongs to the consumables in exhaust analyzer.

[0003] Contact terminal is the important component on nitrogen oxygen sensor, in prior art, most nitrogen oxygen sensors are usually installed in engine exhaust pipe or exhaust pipe before catalytic converter when using, due to the strong vibration generated in the process of automobile driving, the force generated by vibration can not make the contact terminal inside sensor effectively contact and connect with ceramic plate, further affect the use of sensor, the oxygen ion conducting membrane of sensor is very fragile, and easily be polluted by carbon, soot, lead, sulfide and other matters in exhaust gas, and the temperature inside exhaust pipe is higher, leading to that the contact terminal inside sensor is easily affected by high temperature and cannot be normally used, therefore, nitrogen oxygen sensor contact terminal needs to be redesigned for the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a nitrogen oxygen sensor contact terminal to solve the shortcoming in prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] Nitrogen oxygen sensor contact terminal, including terminal main part, the arc bending is arranged on the terminal main part outer wall, the first R angle and the second R angle are arranged on the terminal main part outer wall, one end of the terminal main part is provided with fixed bending, the other end of the terminal main part is fixedly connected with the wire sleeve.

[0007] Preferably, the terminal main part is SUS304 material, and the surface of the terminal main part is treated by electroplating nickel.

[0008] Preferably, the outer wall and the inner wall of the wire sleeve are arc-shaped, and a plurality of crimping grooves facilitating bending are formed in the arc-shaped inner wall of the wire sleeve.

[0009] Preferably, the terminal main part outer wall is fixedly installed with a fixed block, and the fixed block outer wall is fixedly installed with an inverted buckle.

[0010] The utility model has the advantages of:

[0011] 1. By setting components such as fixed bending, arc bending and inverted buckle, one end of the terminal body can be hung on the outer wall of the ceramic sheet through fixed bending, and the inverted buckle can be inserted into the connection groove. During installation, the protrusion of the arc bending can contact and squeeze the surface of the ceramic sheet, thereby ensuring a firm connection of the inverted buckle inside the connection groove, thus improving the reliability of the terminal body during installation.

[0012] 2. By setting components such as crimping sleeves and crimping grooves, the crimping grooves facilitate the bending of the crimping sleeves, thereby making it easier for the two crimping sleeves to pinch together, which in turn facilitates a firm connection between the two terminal bodies and the wires. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the structure of the nitrogen and oxygen sensor contact terminal proposed in this utility model;

[0014] Fig. 2 This is a top view of the contact terminal of the nitrogen and oxygen sensor proposed in this utility model;

[0015] Fig. 3 This is a schematic diagram of the bottom structure of the nitrogen and oxygen sensor contact terminal proposed in this utility model.

[0016] In the diagram: 1 Terminal body, 2 Arc bend, 3 First R angle, 4 Second R angle, 5 Fixed bend, 6 Wire clamp, 7 Crimp groove, 8 Fixing block, 9 Inverted clip. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figs. 1-3 The nitrogen-oxygen sensor contact terminal includes a terminal body 1. The outer wall of the terminal body 1 is provided with an arc-shaped bend 2, a first radius 3 and a second radius 4. One end of the terminal body 1 is provided with a fixed bend 5, and the other end of the terminal body 1 is fixedly connected with a wire clamping sleeve 6. The terminal body 1 is made of SUS304, which is an austenitic stainless steel. This material has excellent corrosion resistance, high temperature strength and creep resistance. The surface of the terminal body 1 is electroplated with nickel. Electroplating with nickel can form a hard nickel layer on the metal surface, thereby enhancing the hardness and wear resistance of the metal and improving its service life.

[0019] The outer and inner walls of the wire clamping sleeve 6 are both arc-shaped. The arc-shaped inner wall of the wire clamping sleeve 6 has multiple crimping grooves 7 that facilitate bending. A fixing block 8 is fixedly installed on the outer wall of the terminal body 1, and a buckle 9 is fixedly installed on the outer wall of the fixing block 8.

[0020] The utility model discloses when using, can first hang fixed bending 5 on the outer wall of ceramic sheet, then insert the reverse buckle 9 into the connecting groove of ceramic sheet surface, the convex place of arc bending 2 can contact and extrude ceramic sheet surface at this moment, thereby can guarantee the firm connection of reverse buckle 9 in connecting groove, then utilize the convex place of first R angle 3 and second R angle 4 and butt joint piece contact, thereby can realize the connection and fixed between contact terminal and ceramic sheet.

[0021] When the contact terminal is connected with the wire, one of the terminal main bodies 1 can be rotated first to be twisted, so that the front and back surfaces of the two terminal main bodies 1 are consistent, then the two contact terminals can be combined, the two wire pressing sleeves 6 are squeezed together through the cooperation of the plurality of pressing grooves 7, so that the connection and fixation of the two contact terminals on the outer wall of the wire are realized, so that the contact terminal and the pressed wire form a loop, and the nitrogen oxygen sensor transmits signals. Since the terminal main body 1 is made of SUS304 material, it has excellent corrosion resistance and can remain stable in various corrosive media. In addition, the surface of the terminal main body 1 is treated with electroplated nickel, which not only enhances the hardness and wear resistance, but also obtains good electrical conductivity, reduces resistance, and shortens the path.

[0022] The above is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A nitrogen and oxygen sensor contact terminal, comprising a terminal body (1), characterized in that, The outer wall of the terminal body (1) is provided with an arc-shaped bend (2), the outer wall of the terminal body (1) is provided with a first R angle (3) and a second R angle (4), one end of the terminal body (1) is provided with a fixed bend (5), and the other end of the terminal body (1) is fixedly connected with a wire clamping sleeve (6).

2. The nitrogen and oxygen sensor contact terminal according to claim 1, characterized in that, The terminal body (1) is made of SUS304 material, and the surface of the terminal body (1) is electroplated with nickel.

3. The nitrogen and oxygen sensor contact terminal according to claim 2, characterized in that, The outer and inner walls of the crimping sleeve (6) are both arc-shaped, and the arc-shaped inner wall of the crimping sleeve (6) is provided with multiple crimping grooves (7) that facilitate bending.

4. The nitrogen and oxygen sensor contact terminal according to claim 3, characterized in that, A fixing block (8) is fixedly installed on the outer wall of the terminal body (1), and a buckle (9) is fixedly installed on the outer wall of the fixing block (8).

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