temperature sensor

Abstract

The utility model discloses a temperature sensor, including connector, wire harness, terminal, shell, insulating part, sealing cover and thermistor component. Wire harness is connected between connector and terminal, and insulating part is covered in the connecting place of wire harness and terminal, and sealing cover is set up on insulating part, and contains wire harness sealing area, insulating sealing area and clamping structure. Wire harness sealing area and wire harness form interference fit, and insulating sealing area is set up around insulating part, and clamping structure is used for fixed sealing cover. The structure effectively promotes the sealing performance of sensor, is applicable to EGR system and other high temperature and high humidity environment, has compact structure, and sealed reliable advantage.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensor technology, and in particular to a temperature sensor with a wiring harness and good sealing performance, which is suitable for applications with high environmental requirements such as automotive exhaust recirculation (EGR) systems. Background Technology

[0002] Existing temperature sensors typically include components such as connectors, wiring harnesses, terminals, housings, and thermistor assemblies. Since temperature sensors often operate in high-temperature, high-humidity, or corrosive gas environments, their sealing performance directly affects the sensor's stability and lifespan.

[0003] Traditional temperature sensors have relatively simple sealing structures at the connection between terminals and wiring harnesses, making them prone to moisture or impurities entering due to poor sealing, leading to degraded electrical performance or even sensor failure. Therefore, there is an urgent need for a temperature sensor with an improved structure to enhance its sealing performance and reliability. Utility Model Content

[0004] The purpose of this invention is to provide a temperature sensor with a wire harness. By setting a sealing cover structure on the insulating part, the sealing performance of the sensor is effectively improved, preventing the intrusion of external moisture or impurities, thereby improving the stability and service life of the sensor.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A temperature sensor includes a connector, a wire harness, a terminal, a housing, an insulator, and a thermistor assembly. One end of the wire harness is connected to the connector, and the other end is connected to the terminal. The insulator is formed over the connection between the terminal and the wire harness, and a sealing cap is provided on the insulator.

[0007] Preferably, the sealing cover includes a wire harness sealing area, an insulation sealing area, and a snap-fit ​​structure. The sealing cover covers the insulation component, the wire harness sealing area is located at the upper end of the insulation component, the insulation sealing area is located around the area of ​​the insulation component outside the housing, and the snap-fit ​​structure is fixed to the insulation component in a snap-fit ​​manner.

[0008] Furthermore, the bottom of the wire harness sealing area contacts the top of the insulation component to form a contact plane.

[0009] Preferably, the sealing cap is a rubber seal, the wire harness sealing area is sleeved on the wire harness and forms an interference fit with the wire harness, thereby achieving a sealing effect.

[0010] Preferably, the insulating sealing area has a structure that is narrow at the top and wide at the bottom, which helps to enhance the sealing stability.

[0011] Preferably, the thermistor assembly consists of a thermistor, leads, and a protective shell. The insulating component is an injection-molded block, and a sealing ring is provided between the insulating component and the shell to further improve the sealing performance.

[0012] Preferably, the temperature sensor can be an EGR temperature sensor, suitable for temperature monitoring in automotive exhaust gas treatment systems.

[0013] The temperature sensor provided by this invention achieves multiple layers of sealing protection by insulating the connection between the wire harness and the terminals and covering it with a sealing cap. This structure effectively improves the sealing performance and reliability of the sensor in high-temperature and high-humidity environments, making it particularly suitable for harsh operating conditions such as EGR systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the temperature sensor of this utility model;

[0015] Figure 2 This is a schematic diagram of the sealing cap.

[0016] Component designation explanation

[0017] 11 Connector; 12 Wire Harness; 13 Terminal; 14 Housing; 15 Insulator; 16 Sealing Cap; 161 Wire Harness Sealing Area; 162 Insulation Sealing Area; 163 Snap-fit ​​Structure; 17 Thermistor Assembly; 171 Thermistor; 172 Pin; 18 Sealing Ring; 19 Protective Shell; 20 Contact Plane Detailed Implementation

[0018] See Figure 1 and Figure 2 A temperature sensor includes a connector 11, a wiring harness 12, a terminal 13, a housing 14, an insulator 15, a sealing cap 16, and a thermistor assembly 17.

[0019] One end of the wiring harness 12 is connected to the connector 11, and the other end is connected to the terminal 13. The terminal 13 is electrically connected to the thermistor assembly 17. The insulating component 15 is injection molded to cover the connection between the terminal 13 and the wiring harness 12, forming a preliminary sealing structure.

[0020] The sealing cap 16 is disposed on the insulating component 15 and includes a wire harness sealing area 161, an insulating sealing area 162, and a snap-fit ​​structure 163. The wire harness sealing area 161 is sleeved on the wire harness 12 and forms an interference fit with the wire harness, with its bottom forming a contact plane 20 with the top of the insulating component; the insulating sealing area 162 is disposed around the insulating component 15 in the outer area of ​​the housing 14, and adopts a structure that is narrow at the top and wide at the bottom to enhance the sealing effect; the snap-fit ​​structure 163 is fixed to the insulating component 15 by snap-fit, ensuring that the sealing cap is stably installed.

[0021] The sealing cap 16 is made of rubber material, which has good elasticity and temperature resistance, further improving the overall sealing performance.

[0022] The thermistor assembly 17 includes a thermistor 171, pins 172, and a protective shell 19, and is used to sense ambient temperature and output electrical signals.

[0023] A sealing ring 18 is provided between the housing 14 and the insulating component 15 to further enhance the sealing performance and prevent external moisture or impurities from entering.

[0024] This invention effectively improves the sealing performance of temperature sensors through the matching structure of the sealing cap and the insulating component, making it suitable for high-requirement environments such as EGR.

[0025] The temperature sensor 100 can be an EGR (Exhaust Gas Recirculation) temperature sensor or other types of temperature sensors. The thermistor 171 in this embodiment is an NTC (Negative Temperature Coefficient) thermistor, but it can also be a PTC (Positive Temperature Coefficient) thermistor.

[0026] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A temperature sensor comprising a connector (11), a wiring harness (12), a terminal (13), a housing (14), an insulating element (15), and a thermistor assembly (17), wherein one end of the wiring harness (12) is connected to the connector (11) and the other end is connected to the terminal (13), and the insulating element (15) is formed over the connection between the terminal (13) and the wiring harness (12), characterized in that, The insulating component (15) is provided with a sealing cap (16).

2. The temperature sensor as described in claim 1, characterized in that, The sealing cover (16) includes a wire harness sealing area (161), an insulation sealing area (162), and a snap-fit ​​structure (163).

3. The temperature sensor as described in claim 2, characterized in that, The sealing cap (16) covers the insulating component (15), the wire harness sealing area (161) is located at the upper end of the insulating component (15), the insulating sealing area (162) is located around the area of ​​the insulating component (15) outside the housing, and the snap-fit ​​structure (163) is fixed to the insulating component (15) in a snap-fit ​​manner.

4. The temperature sensor as described in claim 2, characterized in that, The bottom of the wire harness sealing area (161) and the top of the insulating member (15) contact to form a contact plane (20).

5. The temperature sensor as described in claim 2, characterized in that, The sealing cap (16) is a rubber seal.

6. The temperature sensor as described in claim 2, characterized in that, The wire harness sealing area (161) is fitted onto the wire harness (12) and forms an interference fit with the wire harness (12), thereby achieving a sealing effect.

7. The temperature sensor as described in claim 2, characterized in that, The insulating sealing area (162) has a structure that is narrow at the top and wide at the bottom.

8. The temperature sensor as described in claim 1, characterized in that, The thermistor assembly (17) consists of a thermistor (171), pins (172), and a protective shell (19).

9. The temperature sensor as described in claim 1, characterized in that, The insulating component (15) is an injection-molded block, and a sealing ring (18) is provided between it and the housing (14).

10. The temperature sensor according to any one of claims 1 to 4, characterized in that, The temperature sensor is an EGR temperature sensor.

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