Engine temperature sensor

Abstract

An engine temperature sensor belongs to the technical field of sensor electrical connecting pieces, and comprises connectors, a joint and a probe assembly, the connector at the tail end is riveted with the joint, the probe assembly at the top end comprises a metal outer tube, and the metal outer tube and the joint are welded to form a welding part; a probe is further included, the probe is connected with a wire, the wire is sleeved with a ceramic tube, and the ceramic tube is located in the metal outer tube, extends into the connector and covers the welding part; the wire and the connector are welded in the joint. Aiming at the existing problem that a detection rod part is easy to damage, the utility model provides the anti-interference engine temperature sensor which is arranged in the metal outer pipe and has high structural strength.

Description

Technical Field

[0001] This application belongs to the field of sensor electrical connector technology, and specifically relates to an engine temperature sensor. Background Technology

[0002] Temperature sensors, as measuring devices that sense temperature signals and convert them into usable electrical signals, are widely used in fields such as machinery and rail transportation. To ensure stable signal transmission and high electrical connection reliability of sensors in complex environments such as vibration and shock, various fixing devices are usually designed around their leads to address the issue of solder joint failure. Currently, the lead fixing devices for temperature sensors are typically complex in design and lack adaptability.

[0003] In a temperature sensor lead fixing device disclosed in CN221224016U, to address the problems in the prior art, the protective coil is fixed and positioned by inserting into the ring of the socket, and the protective tube is clamped and fixed to the lead by interference fit with the protective sleeve, thus solving the problem of the complexity of the lead fixing device. However, there is still a problem in the prior art that has been overlooked: the strength of the protective sleeve of the wire is insufficient, and the connection is prone to breakage after long-term use. Utility Model Content

[0004] The purpose of this invention is to address the existing problem of the probe being easily damaged, and to provide an engine temperature sensor with high structural strength and anti-interference by setting it inside a metal outer tube.

[0005] To achieve the above technical objectives, the following technical solution is provided:

[0006] An engine temperature sensor includes a connector, a connector, and a probe assembly, wherein the connector at one end is riveted to the connector, and the probe assembly at the top includes a metal outer tube, and the metal outer tube is welded to the connector to form a welded part.

[0007] It also includes a probe connected to a wire, on which a ceramic tube is fitted. The ceramic tube is located inside a metal outer tube and extends into the connector, covering the solder joint. The wire and the connector are soldered inside the connector.

[0008] In one feasible embodiment, the probe assembly also includes a thermally conductive adhesive layer that covers the probe and is located inside a metal outer tube, with its top end fitting against the inner wall of the metal outer tube and its end connected to a ceramic tube.

[0009] In an feasible embodiment, an inner sealing ring is provided between the connector and the fitting.

[0010] In one feasible embodiment, an external sealing ring is fitted around the joint.

[0011] In one feasible embodiment, the connector has a mounting base and a connection cavity, wherein the mounting base is embedded with wiring pins, the ends of which are located within the connection cavity.

[0012] In one feasible embodiment, a wiring space is provided within the connector, located between the connector and the outer metal tube, and contains a portion of a ceramic tube; a welding wire is provided between the wire and the terminal, and welding is performed using the welding wire.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The metal outer tube surrounding the conductors ensures the structural strength of the entire probe assembly and also provides interference protection. Furthermore, the increased structural strength of the ceramic tube allows for a longer and more stable probe assembly compared to existing technologies. The connector cavity design prevents the connector pins from deforming due to external exposure. The overall structure is simple, easy to install, low-cost, suitable for mass production, and highly adaptable. Attached Figure Description

[0015] 1 Connector, 2 Connector, 3 Probe Assembly, 4 Inner Seal Ring, 5 Outer Seal Ring, 11 Mounting Base, 12 Connecting Cavity, 13 Wiring Pin, 21 Welding Wire, 31 Metal Outer Tube, 32 Probe, 33 Ceramic Tube, 34 Thermally Conductive Adhesive Layer

[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0017] Figure 2 This is a schematic diagram of the connector end in frontal projection direction in this embodiment;

[0018] Figure 3 yes Figure 2 Sectional view at point AA; Detailed Implementation

[0019] like Figure 1 , Figure 2 and Figure 3 The embodiment shown includes an engine temperature sensor, comprising a connector 1, a connector 2, and a probe assembly 3. The connector 1 at the end is riveted to the connector 2, and the probe assembly 3 at the top includes a metal outer tube 31, which is welded to the connector 2 to form a welded part.

[0020] In this embodiment, the probe assembly 3 also includes a probe 32, which is connected to a wire. A ceramic tube 33 is sleeved on the wire. The ceramic tube 33 is located inside the metal outer tube 31 and extends into the connector 2, covering the welded part.

[0021] In this embodiment, the probe assembly 3 further includes a thermally conductive adhesive layer 34, which covers the probe 32 and is located inside the metal outer tube 31. The top end fits into the inner wall of the metal outer tube 31, and the end end is connected to the ceramic tube 33.

[0022] As described above, the top of the metal outer tube 31 has a thermally conductive adhesive layer 34, and a probe 32 and part of the wire are wrapped in the thermally conductive adhesive layer 34. The middle part of the metal outer tube 31 has a ceramic tube 33, which is wrapped with wires. The wires are fixed to the end cups of the protruding wires, and the ceramic tube 33 is embedded in the thermally conductive adhesive layer 34.

[0023] In this embodiment, the connector 1 has a mounting base 11 and a connecting cavity 12. The mounting base 11 is embedded with a wiring pin 13, and the end of the wiring pin 13 is located in the connecting cavity 12.

[0024] In this embodiment, a wiring space is provided inside the connector 2, located between the connector 1 and the metal outer tube 31, and containing a portion of a ceramic tube 33. More precisely, the wiring space is located at the front of the mounting base 11 and behind the metal outer tube 31, with the rear end of the ceramic tube 33 carrying a wire that extends into the wiring space. Furthermore, a solder wire 21 is provided between the wire and the terminal 13, and welding is performed by soldering the wire to the connector 1 inside the connector 2.

[0025] In this embodiment, the connector 1 and the joint 2 are riveted together by pressing the mounting base 11 into the joint 2. To increase the sealing between the two, an inner sealing ring 4 is provided outside the mounting base 11, that is, an inner sealing ring 4 is provided between the connector 1 and the joint 2. The metal outer tube 31 and the joint 2 are laser welded together.

[0026] In this embodiment, in order to ensure a tighter fit with external components, an outer sealing ring 5 is fitted over the connector 2.

[0027] In this embodiment, a ceramic tube 33 is first fitted onto the wire, and the probe 32 is pre-lengthened and then fixed onto the ceramic tube 33. Then, the wire is welded to the connector pin 13 inside the connector 1 using welding wire 21. An inner sealing ring 4 is placed inside the connector 2, and an outer sealing ring 5 is placed outside the connector 2. A thermally conductive adhesive layer 34 is placed inside the metal outer tube 31, and then the metal outer tube 31 is laser-welded to the connector 2. Finally, the probe 32 is inserted into the metal outer tube 31, and the connector 1 and connector 2 are press-fitted together.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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. An engine temperature sensor, comprising a connector (1), a connector (2), and a probe assembly (3), wherein the connector (1) at one end is riveted to the connector (2), characterized in that, The probe assembly (3) located at the top includes a metal outer tube (31), which is welded to the connector (2) to form a welded part; It also includes a probe (32), which is connected to a wire and a ceramic tube (33) is sleeved on the wire. The ceramic tube (33) is located inside the metal outer tube (31) and extends into the joint (2) and covers the welding part. The wire is welded to the connector (1) inside the joint (2).

2. The engine temperature sensor according to claim 1, characterized in that, The probe assembly (3) also includes a thermally conductive adhesive layer (34), which covers the probe (32) and is located inside the metal outer tube (31). The top end fits the inner wall of the metal outer tube (31), and the end end is connected to the ceramic tube (33).

3. The engine temperature sensor according to claim 2, characterized in that, An inner sealing ring (4) is provided between the connector (1) and the joint (2).

4. The engine temperature sensor according to claim 2, characterized in that, The connector (2) is fitted with an outer sealing ring (5).

5. The engine temperature sensor according to claim 1, characterized in that, The connector (1) has a mounting base (11) and a connecting cavity (12). The mounting base (11) is provided with a wiring pin (13), and the end of the wiring pin (13) is located in the connecting cavity (12).

6. The engine temperature sensor according to claim 5, characterized in that, The connector (2) has a wiring space located between the connector (1) and the metal outer tube (31), and has a portion of the ceramic tube (33) inside; the wire and the terminal (13) are connected by a welding wire (21) for welding.

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