Wire harness sealing rubber sleeve for reducing NVH (Noise Vibration and Harshness) of whole vehicle

Abstract

The utility model discloses a wire harness sealing rubber sleeve capable of reducing whole vehicle NVH, the wire harness sealing rubber sleeve is clamped in a preset via hole of an automobile metal plate, an automobile wire harness passes through the wire harness sealing rubber sleeve, and the wire harness sealing rubber sleeve is characterized in that the wire harness sealing rubber sleeve is provided with a wire outlet sleeve in interference fit with the automobile wire harness; a sealing sleeve is arranged on the outer side of the wire outlet sleeve, the wire outlet sleeve is wrapped by the sealing sleeve, a hollow cavity is formed between the sealing sleeve and the wire outlet sleeve, sound insulation cotton is arranged in the hollow cavity, one end of the sound insulation cotton abuts against the inner wall of the sealing sleeve, and when the hollow cavity is sealed, the sound insulation cotton is arranged on the inner wall of the sealing sleeve. The hollow cavity is divided into the first noise reduction cavity and the second noise reduction cavity through the sound insulation cotton, through the structures of the noise reduction cavities and the sound insulation cotton, noise outside the cabin crosses various media in the transmission process of the transmission rubber part, the attenuation degree is increased, and therefore the sound insulation effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical application field of automobile parts, in particular to a wire harness sealing rubber sleeve for reducing the vehicle NVH. Background Technique

[0002] When an automobile is running, the sound generated by the engine operation is the main noise source inside the carriage. At this time, the automobile sheet metal distributed around the vehicle body plays a good sound insulation effect; currently, the main structures adopted for the sound insulation structure are cavity structures or structures such as thickening the wall thickness of rubber parts and honeycomb holes. All of them are single-medium transmission, and the overall sound insulation effect is not good. The noise will be transmitted to the inside of the carriage through the through holes of the wire harness sealing rubber sleeve, thereby reducing the comfort of the whole vehicle. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides a wire harness sealing rubber sleeve for reducing the vehicle NVH. Through the structure of the sound absorption cavity and the sound insulation cotton, the noise outside the cabin is attenuated to a greater extent when passing through multiple media during the transmission through the rubber part, thereby achieving the sound insulation effect.

[0004] The technical solution of the utility model is: a wire harness sealing rubber sleeve for reducing the vehicle NVH, the wire harness sealing rubber sleeve is clamped into a preset through hole of the automobile sheet metal, and the automobile wire harness is arranged through the wire harness sealing rubber sleeve. It is characterized in that the wire harness sealing rubber sleeve is provided with an outlet sleeve in interference fit with the automobile wire harness. A sealing sleeve is arranged outside the outlet sleeve. A middle cavity is formed between the sealing sleeve and the outlet sleeve by covering the outlet sleeve. Sound insulation cotton is arranged in the middle cavity. One end of the sound insulation cotton abuts against the inner wall of the sealing sleeve. When the middle cavity is sealed, the sound insulation cotton divides the middle cavity into a first sound absorption cavity and a second sound absorption cavity.

[0005] Further, the sealing sleeve and the outlet sleeve are coaxially arranged.

[0006] Further, the sealing sleeve and the outlet sleeve are of an integrally formed structure.

[0007] Further, the inner wall of the sealing sleeve is provided with support ribs and support platforms. The sound insulation cotton abuts against the support ribs and support platforms and encloses a first sound absorption cavity with the sealing sleeve.

[0008] Further, the outlet sleeve is divided into an inlet port and an outlet port. A tightening sleeve is arranged at one end of the sealing sleeve located at the outlet port. The tightening sleeve and the outlet sleeve are of an integrally formed horn-shaped structure.

[0009] Further, a compression and relaxation groove is arranged between the tightening sleeve and the outlet sleeve. The compression and relaxation groove is communicated with the middle cavity, and two V-shaped openings are symmetrically arranged at the end of the tightening sleeve.

[0010] Further, the compression and relaxation grooves cause the two V-shaped openings to close and are sealed relative to the wire outlet sleeve by a sealing tape, so that the sound insulation cotton divides the hollow cavity into a first sound absorption cavity and a second sound absorption cavity.

[0011] Further, sealing ribs are provided on the outer side of the sealing sleeve, and the sealing ribs are in interference fit with the vehicle body sheet metal.

[0012] Further, one end of the wire outlet sleeve located inside the sealing sleeve is a straight tube section, and the guiding section of the wire outlet sleeve located outside the sealing sleeve is obliquely connected to the straight tube section.

[0013] The beneficial technical effects of the present utility model are as follows:

[0014] 1. By providing a sound insulation cotton structure, the noise attenuation ability of the rubber is enhanced to ensure compliance with the vehicle's NVH.

[0015] 2. The combined structure of the hollow cavity, the compression and relaxation grooves, and the V-shaped openings ensures the assembly effectiveness of the sound insulation cotton and the forming effectiveness of the rubber parts.

[0016] 3. The structure of the support ribs and the support platform causes the sound insulation cotton to divide the hollow cavity into a first sound absorption cavity and a second sound absorption cavity, thereby realizing the cross-medium transmission of sound and increasing the attenuation degree.

[0017] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and to implement it in accordance with the content of the description, the following takes the preferred embodiments of the present utility model and combines with the accompanying drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is another perspective of the schematic diagram of the overall structure of the present utility model;

[0020] Figure 3 is a cross-sectional view of the present utility model.

[0021] The reference numerals are:

[0022] 1. Wire outlet sleeve; 11. Guiding section; 12. Straight tube section; 2. Sealing sleeve; 21. Sealing rib; 22. Support rib; 23. Support platform; 24. Tightening sleeve; 241. V-shaped opening; 25. Compression and relaxation groove; 3. Sound insulation cotton; 41. First sound absorption cavity; 42. Second sound absorption cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to more clearly understand the technical means of the present utility model and be able to implement it in accordance with the content of the specification, the following further describes in detail the specific implementation manners of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0024] It should be noted that the terms "first", "second", etc. in the specification, claims and the above drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described herein.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship recorded in the embodiments and shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] As Figures 1 - 3 shown, the present utility model specifically relates to a wire harness sealing rubber sleeve for reducing the NVH of the whole vehicle. The wire harness sealing rubber sleeve is snapped into a preset through hole of the automotive sheet metal, and the automotive wire harness is arranged through the wire harness sealing rubber sleeve. It is characterized in that the wire harness sealing rubber sleeve is provided with an outlet sleeve 1 for interference fit with the automotive wire harness. A sealing sleeve 2 is arranged on the outer side of the outlet sleeve 1. The sealing sleeve 2 wraps the outlet sleeve 1 and forms a hollow cavity between the sealing sleeve 2 and the outlet sleeve 1. Sound insulation cotton 3 is arranged in the hollow cavity. One end of the sound insulation cotton 3 abuts against the inner wall of the sealing sleeve 2. When the hollow cavity is sealed, the sound insulation cotton 3 divides the hollow cavity into a first sound absorption cavity 41 and a second sound absorption cavity 42.

[0027] The noise source mentioned in this embodiment can be the noise generated by the engine operation or the tire noise and road noise generated during the vehicle driving. Through the wire harness sealing rubber sleeve provided by this embodiment, the isolation performance of the wire harness sealing rubber sleeve installed in the preset through hole of the automotive sheet metal is effectively improved, thereby achieving the effect of isolating noise and preventing the noise from entering the vehicle through the preset through hole of the automotive sheet metal, and improving the comfort during vehicle driving.

[0028] First, since the wire outlet sleeve 1 is arranged inside the sealing sleeve 2, and there is a hollow cavity with one end open between the wire outlet sleeve 1 and the sealing sleeve 2, the hollow cavity is expanded through mechanical tooling, and the sound insulation cotton 3 is loaded into the hollow cavity by personnel. Then the wire outlet sleeve 1 is expanded, and the wire harness is inserted, so that the wire outlet sleeve 1 and the wire harness are in interference fit to ensure that the wire harness is closely attached to the wire outlet sleeve 1; then the outer wall of the sealing sleeve 2 is wound with sealing tape to seal the hollow cavity, and then it is installed in the automotive sheet metal hole, so that the sealing sleeve 2 and the vehicle body sheet metal are in interference fit to achieve the sealing and sound insulation effects.

[0029] At this time, the hollow cavity is sealed, and the hollow cavity is divided into a first sound absorption cavity 41 and a second sound absorption cavity 42 by the sound insulation cotton 3. Through the structures of the first sound absorption cavity 41, the sound insulation cotton 3 and the second sound absorption cavity 42, the noise crosses multiple media during the transmission process to achieve the sound insulation effect.

[0030] The sealing sleeve 2 and the wire outlet sleeve 1 are coaxially arranged.

[0031] The sealing sleeve 2 and the wire outlet sleeve 1 are of an integrally formed structure.

[0032] The inner wall of the sealing sleeve 2 is provided with support ribs 22 and support platforms 23, and the sound insulation cotton 3 abuts against the support ribs 22 and support platforms 23 and encloses the first sound absorption cavity 41 with the sealing sleeve 2.

[0033] The arrangement of the support ribs 22 and support platforms 23 not only ensures the stability of the sound insulation cotton 3 in the hollow cavity, but also, due to the arrangement of the support ribs 22 and support platforms 23, the sound insulation cotton 3 and the inner wall of the sealing sleeve 2 enclose the first sound absorption cavity 41. When the noise is transmitted to the first sound absorption cavity 41, it is attenuated to a certain extent, and then further attenuated by the sound insulation cotton 3, so that the noise crosses multiple media during the transmission process to achieve the sound insulation effect.

[0034] The wire outlet sleeve 1 is divided into an inlet and an outlet. At one end of the sealing sleeve 2 located at the outlet, there is a tightening sleeve 24, and the tightening sleeve 24 and the wire outlet sleeve 1 are of an integrally formed horn-shaped structure.

[0035] There is a compression and relaxation groove 25 between the tightening sleeve 24 and the wire outlet sleeve 1. The compression and relaxation groove 25 is communicated with the hollow cavity, and two V-shaped openings 241 are symmetrically arranged at the end of the tightening sleeve 24.

[0036] The compression and relaxation groove 25 closes the two V-shaped openings 241 and is sealed relative to the wire outlet sleeve 1 by sealing tape, so that the sound insulation cotton 3 divides the hollow cavity into a first sound absorption cavity 41 and a second sound absorption cavity 42.

[0037] During the noise transmission process, the noise passes through the first sound absorption cavity 41, the sound insulation cotton 3, and the second sound absorption cavity 42 in sequence, crosses multiple media, and the attenuation degree increases, thereby achieving the sound insulation effect.

[0038] A sealing rib 21 is provided on the outer side of the sealing sleeve 2, and the sealing rib 21 is in interference fit with the vehicle body sheet metal, achieving the effects of sealing and sound insulation.

[0039] One end of the wire outlet sleeve 1 located inside the sealing sleeve 2 is a straight tube section 12, and the guiding section 11 of the wire outlet sleeve 1 located outside the sealing sleeve 2 is obliquely connected to the straight tube section 12.

[0040] The above embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A wiring harness sealing rubber sleeve for reducing the NVH of a whole vehicle, wherein the wiring harness sealing rubber sleeve is inserted into a preset through hole of a car sheet metal, and the car wiring harness is arranged through the wiring harness sealing rubber sleeve, characterized in that: The wiring harness sealing rubber sleeve is provided with an outlet sleeve (1) with an interference fit with the automobile wiring harness, and a sealing sleeve (2) is provided on the outer side of the outlet sleeve (1). The outlet sleeve (1) is covered by the sealing sleeve (2) and a hollow cavity is formed between the outlet sleeve (1) and the sealing sleeve (2). Sound insulation cotton (3) is provided in the hollow cavity, and one end of the sound insulation cotton (3) abuts against the inner wall of the sealing sleeve (2). When the hollow cavity is sealed, the sound insulation cotton (3) divides the hollow cavity into a first silencer cavity (41) and a second silencer cavity (42).

2. The wiring harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 1, characterized in that: The sealing sleeve (2) is coaxially arranged with the outlet sleeve (1).

3. The wiring harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 2, characterized in that: The sealing sleeve (2) and the outlet sleeve (1) are an integrally formed structure.

4. The wiring harness sealing rubber sleeve for reducing the NVH of a whole vehicle according to claim 3, characterized in that: The inner wall of the sealing sleeve (2) is provided with supporting ribs (22) and a supporting platform (23); the sound insulation cotton (3) abuts against the supporting ribs (22) and the supporting platform (23), and is enclosed with the sealing sleeve (2) to form a first silencing chamber (41).

5. The wiring harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 1, characterized in that: The outlet sleeve (1) is divided into an inlet and an outlet, and the sealing sleeve (2) is provided with a tightening sleeve (24) at one end of the outlet, and the tightening sleeve (24) and the outlet sleeve (1) are an integrally formed trumpet-shaped structure.

6. The wiring harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 5, characterized in that: A compression and relaxation groove (25) is provided between the tightening sleeve (24) and the outlet sleeve (1), the compression and relaxation groove (25) is communicated with the hollow cavity, and two V-shaped openings (241) are symmetrically provided at the end of the tightening sleeve (24).

7. The wire harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 6, characterized in that: The compression and relaxation groove (25) closes the two V-shaped openings (241) and is sealed relative to the outlet sleeve (1) by means of a sealing tape, so that the sound insulation cotton (3) separates the hollow cavity into a first silencer cavity (41) and a second silencer cavity (42).

8. The wiring harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 1, characterized in that: The outer side of the sealing sleeve (2) is provided with a sealing rib (21), and the sealing rib (21) is interference fit with the body sheet metal.

9. The wire harness sealing rubber sleeve for reducing NVH of a whole vehicle according to claim 1, characterized in that: One end of the outlet sleeve (1) located inside the sealing sleeve (2) is a straight section (12), and the guide end of the outlet sleeve (1) located outside the sealing sleeve (2) is obliquely connected to the straight section (12).

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