Vehicle temperature sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a temperature sensor for a vehicle, which comprises a contact assembly, a connecting assembly arranged outside the contact assembly and a rear seat assembly connected with the connecting assembly in a sealing manner, and the contact assembly comprises a thermistor and a low-carbon steel shell arranged outside the thermistor. The connecting assembly comprises a shell located outside the contact assembly, a mounting cavity formed in the shell and a sealing ring assembled outside the shell, the rear seat assembly comprises a rear seat and a metal connecting needle connected with the contact assembly, and the shell and the rear seat are in sealed connection through a sealing assembly. According to the utility model, through arranging the annular bulge which is attached to the mounting groove on the outer edge of the rear seat, the horizontal ring surface and the inclined ring surface can be utilized to extrude the first sealing ring, so that the first sealing ring can be in multi-point contact with the inner wall of the mounting groove, the horizontal ring surface and the inclined ring surface, and the sealing reliability of the sensor is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a temperature sensor for vehicles. Background Technology

[0002] A sensor is a detection device that can sense the information being measured and transform that information into an electrical signal or other required form of information output according to a certain rule, in order to meet the requirements of information transmission, processing, storage, display, recording, and control. There are many types of sensors, mainly including load cells, temperature sensors, displacement sensors, pressure sensors, and ultrasonic distance sensors. With the rapid development of new energy vehicles, traditional automotive air conditioning systems can no longer meet the demands. The operating characteristics of the battery and thermal management system of new energy vehicles are closely related to temperature and air conditioning pipeline pressure. The new air conditioning thermal management system must not only control the comfort of the cabin but also precisely control the operating temperature of the battery pack. Existing automotive temperature sensors have low sealing performance and are unstable after installation, posing certain safety hazards. This product solves these problems through improvements to the sensor structure. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a vehicle temperature sensor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Design an automotive temperature sensor, including a contact assembly, a connecting assembly disposed outside the contact assembly, and a rear seat assembly sealed to the connecting assembly. The contact assembly includes a thermistor and a low-carbon steel housing disposed outside the thermistor. The connecting assembly includes a housing located outside the contact assembly, a mounting cavity disposed within the housing, and a sealing ring assembled outside the housing. The rear seat assembly includes a rear seat and a metal connecting pin connected to the contact assembly. The housing and the rear seat are sealed together by a sealing assembly. The sealing assembly includes a mounting groove formed at the end of the housing, an annular protrusion disposed along the outer edge of the rear seat and fitting against the mounting groove, a horizontal annular surface and an inclined annular surface disposed at the bottom of the annular protrusion, and a first sealing ring located between the mounting groove and the horizontal and inclined annular surfaces. The horizontal and inclined annular surfaces are connected to each other and form an included angle α.

[0006] Furthermore, the included angle α ranges from 120°. <a<140°。

[0007] Furthermore, the top of the annular protrusion is provided with an arc-shaped annular surface, and the mounting groove is provided with an extended edge for pressing against the arc-shaped annular surface.

[0008] Furthermore, the sealing assembly also includes a limiting portion for preventing relative rotation between the housing and the rear seat.

[0009] Furthermore, the limiting part includes a groove provided at the bottom of the mounting groove and a locking block provided on the rear seat corresponding to the groove.

[0010] The vehicle temperature sensor proposed in this utility model has the following advantages:

[0011] This invention features an annular protrusion on the outer edge of the rear seat that fits snugly into the mounting groove. After the annular protrusion enters the mounting groove, the horizontal and inclined annular surfaces can press against the first sealing ring, allowing the first sealing ring to make multi-point contact with the inner wall of the mounting groove and the horizontal and inclined annular surfaces. This significantly improves the fit between the first sealing ring and the horizontal and inclined annular surfaces, thereby enhancing the sealing effect of the first sealing ring and strengthening the sealing reliability of the sensor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the connecting components;

[0015] Figure 4 This is a schematic diagram of the rear seat components; Detailed Implementation

[0016] 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.

[0017] Example, refer to Figure 1-4, a vehicle temperature sensor, comprising a contact component 1, a connection component 2 provided outside the contact component 1, and a rear seat component 3 hermetically connected to the connection component 2. The contact component 1 includes a thermistor 101 and a low-carbon steel outer shell 102 provided outside the thermistor 101. The connection component 2 includes a housing 201 located outside the contact component 1, an installation cavity 202 provided inside the housing 201, and a sealing ring 203 assembled outside the housing 201. The rear seat component 3 includes a rear seat 301 and a metal connection pin 302 connected to the contact component 1. The metal connection pin 302 is hermetically connected to the rear seat 301. The housing 201 and the rear seat 301 are hermetically connected through a sealing component 4. Among them, the sealing component 4 includes an installation groove 401 opened at the end of the housing 201, an annular protrusion 402 arranged along the outer edge of the rear seat 301 and fitting with the installation groove 401, a horizontal ring surface 403 and an inclined ring surface 404 provided at the bottom of the annular protrusion 402, and a first sealing ring 405 located between the installation groove 401, the horizontal ring surface 403 and the inclined ring surface 404. The horizontal ring surface 403 and the inclined ring surface 404 are connected to each other and form an included angle a.

[0018] In the present utility model, by providing an annular protrusion 402 arranged along the outer edge of the rear seat 301 and fitting with the installation groove 401, after the annular protrusion 402 enters the installation groove 401, the first sealing ring 405 can be extruded by the horizontal ring surface 403 and the inclined ring surface 404, so that the first sealing ring 405 can make multi-point contact with the inner wall of the installation groove 401, the horizontal ring surface 403 and the inclined ring surface 404, significantly improving the fitting degree between the first sealing ring 405 and the horizontal ring surface 403 and the inclined ring surface 404, thereby improving the sealing effect of the first sealing ring 405 and enhancing the sealing reliability of the sensor.

[0019] In an optional embodiment of the present utility model, the range of the included angle a is 120° < a < 140°. By controlling the included angle between the horizontal ring surface and the inclined ring surface within the range of 120° - 140°, it is ensured that the first sealing ring 405 is fully compressed to achieve tight sealing.

[0020] In an optional embodiment of the present utility model, an arc-shaped ring surface 406 is provided at the top of the annular protrusion 402, and an extension edge 407 for pressing on the arc-shaped ring surface 406 is provided on the installation groove 401. Preferably, in this embodiment, the extension edge 407 can be fixed on the arc-shaped ring surface 406 by riveting. The extension edge 407 is fixed by riveting, which not only enhances the mechanical connection strength between the housing 201 and the rear seat 301, but also forms a secondary sealing barrier. The riveting process further ensures the stability of the sealing group 4 in a vibrating environment and prevents sealing failure caused by component loosening.

[0021] In an optional embodiment of the present invention, the sealing assembly 4 further includes a limiting part 408 for preventing relative rotation between the housing 201 and the rear seat 301. By providing the limiting part 408, relative rotation between the housing 201 and the rear seat 301 is prevented during assembly or use, thereby avoiding the first sealing ring 405 from reducing its sealing performance due to torsional deformation and ensuring the long-term stability of the sealing interface.

[0022] In an optional embodiment of this utility model, the limiting part 408 includes a groove 4081 provided at the bottom of the mounting groove 401 and a locking block 4082 provided on the rear seat 301 corresponding to the groove 4081. Preferably, in this embodiment, the locking block 4082 is semi-circular in shape and symmetrically distributed. The mechanical interlocking design of the groove 4081 and the locking block 4082 achieves precise positioning, simplifies the assembly process, and completely eliminates rotational degrees of freedom. This structure provides double protection through physical limiting, and can maintain the geometric shape of the sealing component even under high vibration conditions, further reducing the risk of seal failure caused by component displacement.

[0023] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0024] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0027] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vehicle temperature sensor, comprising a contact assembly (1), a connecting assembly (2) disposed outside the contact assembly (1), and a rear seat assembly (3) sealed to the connecting assembly (2), wherein the contact assembly (1) includes a thermistor (101) and a low-carbon steel housing (102) disposed outside the thermistor (101), the connecting assembly (2) includes a housing (201) located outside the contact assembly (1), a mounting cavity (202) disposed within the housing (201), and a sealing ring (203) fitted outside the housing (201), and the rear seat assembly (3) includes a rear seat (301) and a metal connecting pin (302) connected to the contact assembly (1), characterized in that: The housing (201) and the rear seat (301) are sealed together by a sealing assembly (4), wherein the sealing assembly (4) includes a mounting groove (401) formed at the end of the housing (201), an annular protrusion (402) provided along the outer edge of the rear seat (301) and fitting with the mounting groove (401), a horizontal annular surface (403) and an inclined annular surface (404) provided at the bottom of the annular protrusion (402), and a first sealing ring (405) located between the mounting groove (401) and the horizontal annular surface (403) and the inclined annular surface (404), the horizontal annular surface (403) and the inclined annular surface (404) being connected to each other and forming an included angle α.

2. The temperature sensor according to claim 1, characterized in that: The included angle α is in the range of 120°. <a<140°。 3. The temperature sensor according to claim 1, characterized in that: The top of the annular protrusion (402) is provided with an arc-shaped annular surface (406), and the mounting groove (401) is provided with an extension edge (407) for pressing onto the arc-shaped annular surface (406).

4. The temperature sensor according to claim 1, characterized in that: The sealing assembly (4) further includes a limiting part (408) for preventing relative rotation between the housing (201) and the rear seat (301).

5. The temperature sensor according to claim 4, characterized in that: The limiting part (408) includes a groove (4081) provided at the bottom of the mounting groove (401) and a locking block (4082) provided on the rear seat (301) corresponding to the groove (4081).

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