Cylinder cover sensor wire harness sealing device

Abstract

The utility model discloses a cylinder cover sensor wire harness sealing device. The wire harness comprises a wire harness body, a lining fixedly formed on the wire harness body, a limiting ring fixedly formed on the wire harness body and located above the lining, a lower connector arranged on the wire harness body in a sleeving mode and located below the lining, and a limiting sleeve arranged on the wire harness body in a sleeving mode and connected to the upper end of the lower connector in a threaded mode. A lower thread section matched with a cylinder cover thread is formed on the circumferential surface of the lower end part of the lower connector, after the limiting sleeve is in threaded connection with the upper end part of the lower connector, the top of the limiting sleeve is pressed on the limiting ring, and sealant is adhered between the lower connector and the wire harness body. The connection depth of the limiting sleeve and the upper end part of the lower connector can be adjusted to adapt to the change of the wire harness body, so that the wire harness is always kept in a tightened state; meanwhile, the lower connector made of the soft material can ensure that the wire harness body is free from the risk of abrasion and splitting; the conical lower connector prevents the wire harness from being pulled out by external force through a conical structure; the lower connector plays a sealing role through the lower threaded section and the threads of the cylinder cover, and liquid in the engine is prevented from flowing out.

Description

Technical Field

[0001] This utility model belongs to the field of engine parts, and specifically relates to a cylinder head sensor wiring harness sealing device. Background Technology

[0002] The wiring harness of the cylinder head sensor is prone to aging and cracking due to prolonged exposure to high temperatures and dynamic environments. This can lead to leakage of high-pressure engine oil from inside the cylinder head to the outside. Furthermore, the fixed size of the hole directly drilled into the cylinder head, combined with the sensor's operation over time, causes the wiring harness to be compressed due to thermal expansion and contraction and vibration, potentially leading to wire breakage and signal interruption or instability. Additionally, traditional sealing joints, which only provide internal metal sealing and clamping, can cause wear and tear on the wiring harness surface after prolonged use, resulting in signal interruption or instability. Summary of the Invention

[0003] The purpose of this invention is to provide a cylinder head sensor harness sealing device with a longer service life.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cylinder head sensor wiring harness sealing device, comprising a wiring harness body, a bushing fixedly formed on the wiring harness body, a limiting ring fixedly formed on the wiring harness body and located above the bushing, a lower connector sleeved on the wiring harness body and located below the bushing, and a limiting sleeve sleeved on the wiring harness body and threadedly connected to the upper end of the lower connector. The lower end of the lower connector has a lower threaded section formed on its circumferential surface that mates with the cylinder head thread. When the limiting sleeve is threadedly connected to the upper end of the lower connector, the top of the limiting sleeve presses against the limiting ring, and sealant is bonded between the lower connector and the wiring harness body.

[0005] In another embodiment, the limiting ring has a notch formed on it to release stress when it is compressed.

[0006] In another embodiment, the limiting sleeve is threadedly connected to the upper threaded section of the lower connector, and a disassembly plate is formed on the circumferential surface of the lower connector between the upper threaded section and the lower threaded section.

[0007] In another embodiment, the cross-section of the disassembly plate is an equilateral hexagon.

[0008] In another embodiment, the lower end of the lower connector is a frustoconical shape that is thicker at the top and thinner at the bottom.

[0009] In another embodiment, the lower end face of the limiting sleeve is open, and the inner sidewall is provided with a thread that matches the upper threaded section of the lower connector.

[0010] In another embodiment, a through hole is formed on the upper end face of the limiting sleeve, and the inner diameter of the through hole matches the outer diameter of the wire harness body.

[0011] In another embodiment, a long groove for stress relief is provided on the upper end surface of the limiting sleeve and on both sides of the through hole.

[0012] In another embodiment, the outer peripheral surface of the limiting sleeve is provided with textured surfaces for easy gripping.

[0013] In another embodiment, the outer peripheral surface of the limiting sleeve is provided with an annular groove.

[0014] Due to the application of the above technical solutions, this utility model has the following advantages compared with the prior art: the connection depth between the limiting sleeve and the upper end of the lower connector can be adjusted to adapt to the changes in the wire harness body, so that the wire harness always remains in a tight state; at the same time, the lower connector made of soft material can ensure that the wire harness body has no risk of wear and tear or cutting; the tapered lower connector prevents the wire harness from being pulled out by external force through the tapered structure; the lower connector plays a sealing role by connecting the lower thread section with the cylinder head thread to prevent the liquid inside the engine from flowing out. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the completed installation of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a perspective view of the limiting sleeve of this utility model;

[0018] Figure 4 This is a perspective view of the limiting sleeve of this utility model from another angle. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] See appendix Figure 1-4 As shown, the cylinder head sensor wiring harness sealing device includes a wiring harness body 0, a bushing 1 fixedly formed on the wiring harness body 0, a limiting ring 2 fixedly formed on the wiring harness body 0 and located above the bushing 1, a lower connector 3 sleeved on the wiring harness body 0 and located below the bushing 1, and a limiting sleeve 4 sleeved on the wiring harness body 0 and threadedly connected to the upper end of the lower connector 3.

[0021] Specifically, the lower end of the lower connector 3 has a threaded section 31 on its circumferential surface that mates with the cylinder head thread. The lower end of the lower connector 3 is a truncated cone shape, wider at the top and narrower at the bottom. The sealing effect of the tapered threaded section 31 prevents liquid from leaking out of the cylinder due to high pressure. When the limiting sleeve 4 is threadedly connected to the upper end of the lower connector 3, the top of the limiting sleeve 4 presses against the limiting ring 2. Sealant is bonded between the lower connector 3 and the wiring harness body 0. The limiting ring 2 has a notch 21 formed on it to release stress when compressed.

[0022] The limiting sleeve 4 is threadedly connected to the upper threaded section 33 of the lower connector 3. A disassembly plate 32 is formed on the circumferential surface of the lower connector 3 between the upper threaded section 33 and the lower threaded section 31. The cross-section of the disassembly plate 32 is an equilateral hexagon.

[0023] The lower end face of the limiting sleeve 4 is open, and the inner side wall is provided with threads that match the upper threaded section 33 of the lower connector 3. A through hole 41 is formed on the upper end face of the limiting sleeve 4, and the inner diameter of the through hole 41 matches the outer diameter of the wire harness body 0. Long grooves 42 for stress relief are formed on the upper end face of the limiting sleeve 4 on both sides of the through hole 41. The outer peripheral surface of the limiting sleeve 4 is provided with textured surfaces for easy gripping, and an annular groove 43 is provided on the outer peripheral surface.

[0024] The cylinder head sensor harness sealing device is positioned on the engine cover according to the number of in-cylinder monitoring sensors or the wire diameter requirements of the sensor harness. The cover must have sufficient thickness for threaded installation to secure the sealing device. Multiple similar sealing devices can be installed based on testing and cylinder head cover dimensions. The notch in the limiting ring is designed to prevent stress from causing the harness to crack due to thermal expansion and contraction after prolonged sensor operation, thus avoiding signal instability and cracking. The bushing, made of plastic, prevents the sensor harness from being dragged laterally, which could lead to sensor measurement failure and detachment.

[0025] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A cylinder head sensor wiring harness sealing device, characterized in that: It includes a wire harness body, a bushing fixedly formed on the wire harness body, a limiting ring fixedly formed on the wire harness body and located above the bushing, a lower connector sleeved on the wire harness body and located below the bushing, and a limiting sleeve sleeved on the wire harness body and threadedly connected to the upper end of the lower connector. The lower end of the lower connector has a threaded section formed on its circumferential surface that mates with the cylinder head thread. Sealant is bonded between the lower connector and the wire harness body.

2. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: The limiting ring has a notch formed on it to release stress when it is compressed.

3. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: The limiting sleeve is threadedly connected to the upper threaded section of the lower connector, and a disassembly plate is formed on the circumferential surface of the lower connector between the upper threaded section and the lower threaded section.

4. The cylinder head sensor wiring harness sealing device according to claim 3, characterized in that: The cross-section of the disassembly plate is an equilateral hexagon.

5. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: The lower end of the lower connector is shaped like a frustum, thicker at the top and thinner at the bottom.

6. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: The lower end face of the limiting sleeve is open, and the inner side wall is provided with a thread that matches the upper thread section of the lower connector.

7. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: A through hole is formed on the upper end face of the limiting sleeve, and the inner diameter of the through hole matches the outer diameter of the wire harness body.

8. The cylinder head sensor wiring harness sealing device according to claim 7, characterized in that: The upper end surface of the limiting sleeve is provided with long grooves for releasing stress on both sides of the through hole.

9. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: The outer circumferential surface of the limiting sleeve is provided with textured surfaces for easy gripping.

10. The cylinder head sensor wiring harness sealing device according to claim 1, characterized in that: The outer circumferential surface of the limiting sleeve is provided with an annular groove.

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