A water temperature sensor

Abstract

The utility model discloses a water temperature sensor, include: main part, injection molded insert and probe, injection molded insert and probe set up respectively at both ends of main part, be equipped with connecting hole and mistake proof groove on injection molded insert, the connecting hole is set up as chamfered hole, the chamfered hole is used for matching the hard plastic PA material bayonet of wire harness end insert, mistake proof groove is used for with the secondary lock catch cooperation on wire harness end insert, the utility model discloses the connecting hole of water temperature sensor injection molded insert is improved as chamfered hole structure to add mistake proof groove, and matches simultaneously and adopts the wire harness end insert of hard plastic PA material and with secondary lock catch, has effectively promoted the air tightness and locking reliability of insert connection, has strengthened the corrosion -resistant performance significantly, prevents the contact bad phenomenon of the loosening, water -induced, guarantees the long -term stability and safety of engine electrical connection under the non -road bad working condition water temperature sensor.

Description

Technical Field

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

[0002] The coolant temperature sensor is a key component in the engine management system, used to monitor the coolant temperature in real time and transmit the signal to the control unit, thereby enabling precise adjustment of the engine's operating status. In harsh operating conditions such as off-road diesel engines, the coolant temperature sensor needs to have higher connection reliability, sealing performance, and environmental tolerance.

[0003] Most commonly used water temperature sensors employ a square connection hole design for their injection-molded body, as shown in the attached image. Figure 1 As shown, a wiring harness end connector with a metal retaining ring is used. This structure has significant drawbacks in engine operation, especially in off-road applications with high vibration: First, the metal retaining ring is prone to corrosion in harsh environments such as humidity and dust, leading to a decrease in clamping force; second, the fit between the square hole and the metal retaining ring cannot maintain effective airtightness over a long period, allowing moisture or impurities to enter at the connection point, causing increased terminal contact resistance, signal distortion, or connection interruption, seriously affecting the reliability of the sensor and the operational safety of the engine. Therefore, a new water temperature sensor structure is urgently needed that can improve the connection reliability, sealing, and corrosion resistance of the connector to adapt to harsh operating conditions. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems of the aforementioned water temperature sensor, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a water temperature sensor that solves the problems of "existing water temperature sensors being prone to corrosion, poor airtightness, and easy loosening of connections due to the use of square connecting holes and metal retaining rings, resulting in poor signal contact and water ingress failures".

[0007] To solve the above technical problems, this utility model provides the following technical solution: a water temperature sensor, comprising: a main body, an injection-molded plug and a probe, wherein the injection-molded plug and the probe are respectively disposed at both ends of the main body, and the injection-molded plug is provided with a connecting hole and an anti-misalignment groove, wherein the connecting hole is configured as a chamfered hole.

[0008] In a preferred embodiment of the water temperature sensor described in this utility model, a tightening screw sleeve is fitted onto the main body, and the main body and the tightening screw sleeve are made of an integral copper material.

[0009] In a preferred embodiment of the water temperature sensor described in this utility model, the copper material is HPb59-1R and has a smooth and undamaged surface.

[0010] In a preferred embodiment of the water temperature sensor described in this utility model, a gasket is fitted onto the probe.

[0011] In a preferred embodiment of the water temperature sensor described in this utility model, the chamfered hole is used to match the hard plastic PA material bayonet of the wire harness end plug.

[0012] In a preferred embodiment of the water temperature sensor described in this utility model, the anti-misalignment groove is used to cooperate with the secondary locking buckle on the wire harness end plug to prevent the plug from becoming loose.

[0013] In a preferred embodiment of the water temperature sensor described in this utility model, the injection-molded plug and the wire harness end plug are tightly fitted together to improve airtightness.

[0014] In a preferred embodiment of the water temperature sensor described in this utility model, the hard plastic PA material of the wire harness end plug is corrosion resistant.

[0015] The beneficial effects of this utility model are as follows: by improving the connection hole of the water temperature sensor injection molding plug into a chamfered hole structure and adding an anti-misalignment groove, and matching it with a wire harness end plug made of hard plastic PA material with a secondary locking buckle, the airtightness and locking reliability of the plug connection are effectively improved, the corrosion resistance is significantly enhanced, and poor contact caused by loosening or water ingress is prevented, thus ensuring the long-term stability and safety of the water temperature sensor electrical connection under harsh off-road conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the planar structure of the injection-molded plug for the original water temperature sensor.

[0018] Figure 2 This is a front structural diagram of a water temperature sensor according to the present invention.

[0019] Figure 3 This is a side view of the structure of a water temperature sensor according to the present invention.

[0020] Figure 4 This is a schematic diagram of the planar structure of the injection molding plug of this utility model.

[0021] Figure descriptions: 101, main body; 102, injection molding insert; 102a, connecting hole; 102b, anti-misalignment groove; 103, probe; 104, tightening screw sleeve; 105, gasket. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0026] Example 1

[0027] Reference Figures 1 to 4 This is the first embodiment of the present invention. This embodiment provides a water temperature sensor with a temperature measurement range of -40℃ to +130℃. It includes: a main body 101, an injection-molded plug 102, and a probe 103. The injection-molded plug 102 and the probe 103 are respectively disposed at both ends of the main body 101. The injection-molded plug 102 has a connecting hole 102a and an anti-misalignment groove 102b. The connecting hole 102a is a chamfered hole, which matches the hard plastic PA material bayonet of the wire harness end plug. The injection-molded plug 102 fits tightly with the wire harness end plug to improve airtightness, and the anti-misalignment groove 102b cooperates with the secondary locking buckle on the wire harness end plug to prevent the plug from loosening.

[0028] In use, the hard plastic PA material bayonet on the wire harness end plug is aligned with the chamfered hole-shaped connection hole 102a of the injection molded plug 102 and inserted. It is then locked by the anti-misalignment groove 102b cooperating with the secondary locking structure on the wire harness end plug, thereby achieving a firm connection and effective sealing between the sensor body and the wire harness end plug.

[0029] Example 2

[0030] Reference Figures 1 to 4 This is the second embodiment of the present invention. Unlike the previous embodiment, the main body 101 is fitted with a tightening screw sleeve 104. The main body 101 and the tightening screw sleeve 104 are made of one piece of copper material. With the help of tools (such as wrenches) to tighten the screw sleeve 104, it is convenient to install or remove the water temperature sensor. The copper material is HPb59-1R, and the surface is smooth and undamaged, without burrs, scratches, chips, sand particles, dust and oil stains.

[0031] Furthermore, refer to Figure 2 , Figure 3 A gasket 105 is fitted onto the probe 103.

[0032] Preferably, the hard plastic PA material of the wire harness end plug has good corrosion resistance.

[0033] During use, tightening the nut 104 with a wrench secures the water temperature sensor in the mounting hole at the installation position. The gasket 105 deforms under pressure, filling the gap between the probe 103 and the mounting hole to form a seal. The harness end plug uses a corrosion-resistant bayonet made of hard plastic PA material, which is aligned and inserted into the chamfered connection hole 102a of the injection-molded plug 102, and locked in place by the anti-misalignment groove 102b and the secondary locking buckle, achieving a reliable and airtight electrical connection.

[0034] It is worth noting that: all standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The machinery, parts and equipment all adopt conventional models in the prior art.

[0035] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A water temperature sensor, comprising a body (101), an injection-molded insert (102), and a probe (103), wherein the injection-molded insert (102) and the probe (103) are respectively disposed at both ends of the body (101), characterized in that: The injection molding insert (102) is provided with a connecting hole (102a) and an anti-misalignment groove (102b), and the connecting hole (102a) is set as a chamfered hole.

2. The water temperature sensor according to claim 1, characterized in that: The main body (101) is fitted with a tightening screw sleeve (104), and the main body (101) and the tightening screw sleeve (104) are made of one piece of copper material.

3. The water temperature sensor according to claim 2, characterized in that: The copper material is HPb59-1R, and its surface is smooth and undamaged.

4. The water temperature sensor according to claim 1, characterized in that: A gasket (105) is fitted onto the probe (103).

5. The water temperature sensor according to claim 1, characterized in that: The chamfered hole is used to match the hard plastic PA material bayonet of the wire harness end plug.

6. The water temperature sensor according to claim 1, characterized in that: The anti-misalignment groove (102b) is used to cooperate with the secondary locking buckle on the wire harness end plug to prevent the plug from becoming loose.

7. The water temperature sensor according to claim 1, characterized in that: The injection molding plug (102) fits tightly against the wire harness end plug to improve airtightness.

8. The water temperature sensor according to claim 5, characterized in that: The hard plastic PA material of the wire harness end plug is corrosion resistant.

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