Automobile engine waterproof temperature-resistant wire harness

Abstract

This utility model provides a waterproof and heat-resistant wiring harness for automotive engines, including a wiring harness, a first connector, a second connector, a third connector, a fourth connector, and a waterproof SR. The wiring harness includes a first wiring harness, a second wiring harness, and a third wiring harness. The first end of the first wiring harness, the first end of the second wiring harness, and the first end of the third wiring harness are all connected to the first connector. The second end of the first wiring harness is connected to the second connector, the second end of the second wiring harness is connected to the third connector, and the second end of the third wiring harness is connected to the fourth connector. The waterproof SR is sleeved on the wiring harness. The waterproof SR is made of EPDM high-temperature resistant soft rubber, which can achieve better heat and water resistance, ensure the service life of the wire, and reduce the risk caused by wire damage.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine wiring harness technology, and in particular to a waterproof and heat-resistant wiring harness for automotive engines. Background Technology

[0002] Existing automotive engine wiring harnesses use XLPE wires and nitrile rubber for waterproofing (SR), with a temperature range of -40℃ to +150℃. In the long-term high-temperature environment of the engine compartment, this poses certain risks. Furthermore, the waterproofing performance of the wires relies on adhesive, which can flow and result in inconsistent thickness. The adhesive is also susceptible to interference from foreign matter and impurities in the environment, meaning the waterproofing effect typically only reaches IP68 in the short term. Moreover, the prolonged high-temperature environment in the engine compartment accelerates the aging of the waterproofing, leading to a decline or even failure of the wiring harness's waterproofing performance over time, ultimately causing malfunctions.

[0003] Improvements to existing technologies are needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a waterproof and heat-resistant wiring harness for automotive engines with a reasonable structure that can effectively prevent water from entering the engine for a long time.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a waterproof and heat-resistant wiring harness for an automotive engine, comprising a wiring harness, a first connector, a second connector, a third connector, a fourth connector, and a waterproof SR. The wiring harness includes a first wiring harness, a second wiring harness, and a third wiring harness. The first end of the first wiring harness, the first end of the second wiring harness, and the first end of the third wiring harness are all connected to the first connector. The second end of the first wiring harness is connected to the second connector. The second end of the second wiring harness is connected to the third connector. The second end of the third wiring harness is connected to the fourth connector. The waterproof SR is sleeved on the wiring harness. The waterproof SR is made of EPDM high-temperature resistant soft rubber.

[0006] Furthermore, the outer periphery of the waterproof SR is provided with waterproof ribs.

[0007] Furthermore, the wiring harness is made of Teflon wire.

[0008] Furthermore, the wire harness is wrapped with a spiral tube.

[0009] Furthermore, the spiral tube is made of Teflon.

[0010] Furthermore, the first connector, second connector, third connector, and fourth connector are all made of high-temperature nylon.

[0011] Furthermore, a sealing plug is provided between the second end of the first wire harness and the second connector; a sealing plug is provided between the second end of the second wire harness and the third connector; and a sealing plug is provided between the second end of the third wire harness and the fourth connector.

[0012] Furthermore, the second, third, and fourth connectors are all equipped with CPA locks.

[0013] Furthermore, the second connector is provided with a flange hole, through which the second connector can be screwed into the plug.

[0014] Furthermore, the wiring harness includes multiple connecting wires, the first connector includes a housing, each of the multiple connecting wires includes a plug-in portion and a fixing portion, the multiple connecting wires are spaced apart, the housing wraps around the fixing portion of the multiple connecting wires, and the plug-in portion of the multiple connecting wires extends to the outside of the housing to form connecting pins.

[0015] The beneficial effects of this utility model are as follows: It provides a waterproof and heat-resistant wiring harness for automotive engines, including a wiring harness, a first connector, a second connector, a third connector, a fourth connector, and a waterproof SR. The wiring harness includes a first wiring harness, a second wiring harness, and a third wiring harness. The first end of the first wiring harness, the first end of the second wiring harness, and the first end of the third wiring harness are all connected to the first connector. The second end of the first wiring harness is connected to the second connector. The second end of the second wiring harness is connected to the third connector. The second end of the third wiring harness is connected to the fourth connector. The waterproof SR is sleeved on the wiring harness. The waterproof SR is made of EPDM high-temperature resistant soft rubber, which can achieve better temperature and waterproof performance, ensure the service life of the wire, and reduce the risk caused by wire damage. Attached Figure Description

[0016] The specific structure of this utility model is described in detail below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the waterproof and heat-resistant wiring harness for automotive engines according to this utility model.

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0019] 1-First connector; 2-Second connector; 21-Protrusion; 22-Flange hole; 3-Third connector; 4-Fourth connector; 41-Slot; 5-Waterproof SR; 51-Waterproof rib; 6-Spiral tube; 7-Connecting wire; 71-Outer sheath; 72-Connecting pin. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0022] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] 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. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0026] Example

[0027] Please see Figure 1 as well as Figure 2 This embodiment provides a waterproof and heat-resistant wiring harness for an automotive engine, including a wiring harness, a first connector 1, a second connector 2, a third connector 3, a fourth connector 4, and a waterproof SR 5. The wiring harness includes a first wiring harness, a second wiring harness, and a third wiring harness. The first end of the first wiring harness, the first end of the second wiring harness, and the first end of the third wiring harness are all connected to the first connector 1. The second end of the first wiring harness is connected to the second connector 2. The second end of the second wiring harness is connected to the third connector 3. The second end of the third wiring harness is connected to the fourth connector 4. The waterproof SR 5 is sleeved on the wiring harness. The waterproof SR 5 is made of EPDM high-temperature resistant soft rubber.

[0028] In this embodiment, the first connector 1 is a 9-pin connector for connecting to the electronic control unit (ECU), the second connector 2 is a 6-pin waterproof connector for connecting to the engine body, the third connector 3 is a 2-pin male connector for connecting to the NTC (temperature sensor), and the fourth connector 4 is a 2-pin female connector for connecting to the excitation power supply. The wiring harness includes the first wiring harness, the second wiring harness, and the third wiring harness. The 9-pin connector is connected to the 6-pin waterproof connector through the first wiring harness, the 9-pin connector is connected to the 2-pin male connector through the second wiring harness, and the 9-pin connector is connected to the 2-pin female connector through the third wiring harness. This allows the functional pins of the 9-pin connector to be routed to the 6-pin waterproof connector, the 2-pin male connector, and the 2-pin female connector, respectively, facilitating electrical connections between devices. To ensure waterproofing, the electronic control unit (ECU) is housed in a waterproof housing with a waterproof partition. A waterproof SR 5 is installed in the middle of the wiring harness. By installing the waterproof SR 5 onto the waterproof partition, water can be effectively prevented from flowing from each connector along the wiring harness to the ECU where the 9-pin connector is located, thus ensuring the waterproof performance of the wiring harness.

[0029] Among them, the waterproof SR 5 uses EPDM high-temperature resistant soft adhesive, which can adapt to the working environment of -50℃ to +175℃ for a long time, ensuring the service life and waterproof effect of the waterproof SR 5.

[0030] In one embodiment, the waterproof SR 5 is provided with waterproof ribs 51 on its outer periphery.

[0031] By setting waterproof reinforcing bars 51 around the outer periphery of the waterproof SR 5, when the waterproof SR 5 is installed on the waterproof partition wall, the waterproof reinforcing bars 51 can deform under the action of external force and form an interference fit with the waterproof partition wall, thereby achieving a tight fit and sealing waterproof effect, further ensuring the waterproof performance.

[0032] In one embodiment, the wire harness is made of Teflon wire.

[0033] Wiring harnesses with Teflon sheaths have a wider range of environmental temperature adaptability and can pass more stringent long-term aging tests, thus ensuring the service life of the wiring harness. At the same time, the Teflon sheath material of the wiring harness gives it better wear resistance, effectively extending its service life in the vibration environment of the engine compartment.

[0034] In one embodiment, the wire harness is wrapped with a spiral tube 6.

[0035] To further enhance the wear resistance of the wire harness, a Teflon spiral tube 6 can be wrapped around the outside of the wire harness to give it better wear resistance.

[0036] In one embodiment, the first connector 1, the second connector 2, the third connector 3, and the fourth connector 4 are all made of high-temperature nylon.

[0037] To ensure the service life of the wiring harness under high temperature and vibration conditions, the first connector 1, the second connector 2, the third connector 3 and the fourth connector 4 are all made of high temperature nylon (PPA), which can ensure that the wiring harness can work stably for a long time in an environment of -50℃ to +175℃.

[0038] In one embodiment, a sealing plug is provided between the second end of the first wire harness and the second connector; a sealing plug is provided between the second end of the second wire harness and the third connector; and a sealing plug is provided between the second end of the third wire harness and the fourth connector.

[0039] By providing sealing plugs at the second ends of the first wire harness, the second end of the second wire harness, and the second end of the third wire harness, when installing the second end of the first wire harness to the second connector, the second end of the second wire harness to the third connector, and the second end of the third wire harness to the fourth connector, water can be prevented from penetrating between the inner core and the outer sheath of the wires into the electronic control unit (ECU), allowing the wire harness to maintain an IP69K waterproof rating for an extended period.

[0040] In one embodiment, the second connector 2, the third connector 3, and the fourth connector 4 are all provided with CPA locks.

[0041] To ensure the vibration resistance of the wiring harness, CPA locks are provided on the second, third, and fourth connectors. The CPA locks can be manifested as protrusions 21 or slots 41 on the structure of each connector. For example, protrusions 21 are provided on the second and third connectors, and slots are provided on the corresponding plug-in connectors of the second and third connectors; slots 41 are provided on the fourth connector, and protrusions are provided on the corresponding plug-in connectors of the fourth connector. After each connector is connected to the plug-in connector, the CPA locks can lock the connector and plug-in connector together, forming a secondary locking plate structure other than the terminal connection. This enables the wiring harness to achieve a vibration resistance level of LV214 V3, ensuring the reliability of the wiring harness connection in the engine compartment environment.

[0042] In one embodiment, the second connector is provided with a flange hole through which the second connector can be screwed to the plug-in.

[0043] To further ensure the vibration resistance of the wire harness, the second connector 2 is provided with a flange hole 22. After the plug is connected to the second connector 2, the plug can be tightened by screws through the flange hole 22, ensuring the reliability and stability of the connection between the second connector 2 and the plug.

[0044] In one embodiment, the wiring harness includes multiple connecting wires 7, the first connector 1 includes a housing, each of the multiple connecting wires includes a plug portion and a fixing portion, the multiple connecting wires are spaced apart, the housing wraps around the fixing portion of the multiple connecting wires, and the plug portion of the multiple connecting wires extends to the outside of the housing to form connecting pins.

[0045] The first end of the first, second, and third wire harnesses each includes multiple connecting wires 7. Each connecting wire includes a plug-in portion and a fixing portion. A section of the outer sheath 71 of the connecting wire is stripped off, and the wire core of the connecting wire is bent. The end of the wire core forms the connecting pin 72 of the plug-in portion. The bent portion of the wire core and a portion including the outer sheath 71 form the fixing portion. The connecting wires 7 are spaced apart according to the connector specifications. A shell is formed on the fixing portion of the connecting wires 7 using an injection molding process to enclose the fixing portion of the connecting wires 7, thus obtaining the first connector 1.

[0046] The first connector 1, manufactured by injection molding, reduces the amount of material used and prevents external liquids from leaking out through the gap between the wire core and the outer sheath, thus ensuring the waterproof performance of the first connector 1.

[0047] As can be seen from the above description, the beneficial effects of this utility model are as follows: It provides a waterproof and heat-resistant wiring harness for automotive engines, including a wiring harness, a first connector, a second connector, a third connector, a fourth connector, and a waterproof SR. The wiring harness includes a first wiring harness, a second wiring harness, and a third wiring harness. The first end of the first wiring harness, the first end of the second wiring harness, and the first end of the third wiring harness are all connected to the first connector. The second end of the first wiring harness is connected to the second connector. The second end of the second wiring harness is connected to the third connector. The second end of the third wiring harness is connected to the fourth connector. The waterproof SR is sleeved on the wiring harness. The waterproof SR is made of EPDM high-temperature resistant soft rubber, which can achieve better temperature and waterproof performance, ensure the service life of the wire, and reduce the risk caused by wire damage.

[0048] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An automotive engine water resistant temperature resistant wire harness characterized by: The device includes a wire harness, a first connector, a second connector, a third connector, a fourth connector, and a waterproof SR. The wire harness includes a first wire harness, a second wire harness, and a third wire harness. The first end of the first wire harness, the first end of the second wire harness, and the first end of the third wire harness are all connected to the first connector. The second end of the first wire harness is connected to the second connector. The second end of the second wire harness is connected to the third connector. The second end of the third wire harness is connected to the fourth connector. The waterproof SR is sleeved on the wire harness. The waterproof SR is made of EPDM high-temperature resistant soft rubber.

2. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: The outer periphery of the waterproof SR is provided with waterproof ribs.

3. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: The wiring harness is made of Teflon wire.

4. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: The wire harness is wrapped with a spiral tube.

5. The automotive engine water resistant temperature resistant wire harness of claim 4, wherein: The spiral tube is made of Teflon.

6. The waterproof and heat-resistant wiring harness for automotive engines according to claim 1, characterized in that: The first connector, second connector, third connector and fourth connector are all made of high-temperature nylon (PPA).

7. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: A sealing plug is provided between the second end of the first wire harness and the second connector; a sealing plug is provided between the second end of the second wire harness and the third connector; and a sealing plug is provided between the second end of the third wire harness and the fourth connector.

8. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: The second, third, and fourth connectors are all equipped with CPA locks.

9. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: The second connector has a flange hole, through which the second connector can be screwed to the plug-in.

10. The automotive engine water resistant temperature resistant wire harness of claim 1, wherein: The wiring harness includes multiple connecting wires. The first connector includes a housing. Each of the multiple connecting wires includes a plug-in portion and a fixing portion. The multiple connecting wires are spaced apart. The housing wraps around the fixing portion of the multiple connecting wires. The plug-in portion of the multiple connecting wires extends to the outside of the housing to form connecting pins.

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