WO2018072332A1

WO2018072332A1 - Sound insulation jacket

Info

Publication number: WO2018072332A1
Application number: PCT/CN2016/113552
Authority: WO
Inventors: 沈义; 马伯奎
Original assignee: 德尔福派克电气系统有限公司
Priority date: 2016-10-19
Filing date: 2016-12-30
Publication date: 2018-04-26
Also published as: CN107963033A

Abstract

A jacket suitable for making cable harnesses or other thin and elongated structures pass through a panel separating two chambers. The jacket reduces noise transferred from one chamber to the other chamber and prevents water and other pollutants from passing through. The jacket comprises a hollow main body, the hollow main body having a first front opening, a rear opening, and a central channel vertically extending in the hollow main body to pass through same. The jacket further comprises an annular body surrounding part of the main body, the annular body being spaced apart from the main body and integrally combined to the main body. The annular body has a cylindrical central part, and a front flange part and a rear flange part that provide a sound chamber. The jacket further comprises an annular sound member, the annular sound member being manufactured using a foaming material having holes, and being provided in the central part of the annular body and surrounding part of the main body.

Description

Acoustic sheath

Cross-reference to related applications

The present application claims the priority of the Chinese Patent Application No. 201610910563.3, the entire disclosure of which is hereby incorporated by reference.

Technical field

The invention relates to a sheath. More particularly, the present invention relates to a sheath for passing a wire harness through a panel separating two chambers, which reduces noise transmitted from one chamber to another and blocks water and other contaminants Pass from one chamber to another.

Background technique

The sheath is typically used on a wire bundle or harness to prevent water from intruding from an environmentally exposed area (eg, an engine compartment in a vehicle) into an environmentally controlled area (eg, the interior of the vehicle). In addition to preventing water intrusion, the sheath used in the current automotive market must be flexible and capable of performing two additional functions. There is an increasing need for jackets to attenuate noise through the sheath.

Sheaths constructed to provide both waterproof and acoustical benefits in automobiles are disclosed in, for example, U.S. Patent Nos. 4,685,173, 4,797,513, 4,959,509, 5,270,487, 5,981,877, and 6,486,400.

The subject matter discussed in the background section should not be considered as prior art merely by its reference in the background section. Similarly, problems mentioned in the background section or related to the subject matter of the background section should not be considered prior to the prior art. The subject matter in the background section merely presents itself as a different method of invention.

Summary of the invention

In accordance with an embodiment of the present invention, a sheath is provided that is adapted to pass a wire harness or other elongated structure through a panel that separates two chambers. The sheath mitigates noise transfer from one chamber to another and prevents water and other contaminants from passing from one chamber to the other. A hollow body having a first front opening, a rear opening, and a central passage extending longitudinally from the first front opening to the rear opening. The central channel is configured to receive an elongated structure, such as a wire or wire harness. The sheath further includes a wrap around the body A portion of an annular body spaced from the body and integrally joined to the body. The annular body has a cylindrical central portion, a front flange portion and a rear flange portion that provide a sound chamber. The sheath further includes a sound ring made of an open cell foam material and disposed within the central portion of the annular body and surrounding a portion of the body.

The body may include a small diameter cylindrical portion, a large diameter cylindrical portion, and a frustoconical portion disposed between the small diameter cylindrical portion and the large diameter cylindrical portion. The small diameter cylindrical portion defines the front opening of the body and the large diameter cylindrical portion defines the rear opening of the body.

The front flange portion of the annular body may include a small diameter cylindrical section and a frustoconical section disposed between the small diameter cylindrical section and the cylindrical central portion. The small diameter cylindrical portion defines a second front opening. The second front opening is configured to receive the sound ring when the sound ring is inserted within the cylindrical center portion. The sheath includes a support ring that projects longitudinally around the body, the support ring configured to space the sound ring from the rear flange portion.

The sound ring may surround a section of the large diameter cylindrical portion. The sound ring may be elastically compressible.

Further features and advantages will be more apparent from the following detailed description of the preferred embodiments.

DRAWINGS

The invention will now be described by way of example with reference to the accompanying drawings in which:

1 is a cutaway side view of a sheath in accordance with an embodiment of the present invention.

detailed description

Described herein is a sheath suitable for use in passing a wire harness or other elongated structure through a panel, such as an engine partition that separates two chambers of a vehicle, such as an engine and a passenger compartment. A sheath is disposed within the opening or inlet between the two chambers and is configured to mitigate noise transfer from one chamber to another and also prevent water and other contaminants from passing from one chamber to another .

FIG. 1 illustrates a non-limiting example of such a sheath 10. The sheath 10 includes a hollow body 12 and an annular body 14 that surrounds a portion of the body 12 that is spaced apart from the body 12 and integrated Grounded to the body 12. The body 12 has a first front opening 16, a rear opening 18 and a central passage 20 extending longitudinally from the first front opening 16 to the rear opening 18. The central channel 20 is configured to receive an elongated structure, such as a wire or wire harness (not shown).

The body 12 includes a small diameter cylindrical portion 22, a large diameter cylindrical portion 24, and a frustoconical portion 26 disposed between the small diameter cylindrical portion 22 and the large diameter cylindrical portion 24. The small diameter cylindrical portion 22 defines a first front opening 16 of the body 12 and the large diameter cylindrical portion 24 defines a rear opening 18 of the body 12. The annular inner front section of the small diameter cylindrical portion 22 has been formed thereon with a plurality of annular ribs 28 that are configured to sealingly engage the elongated structure received within the central passage 20. Moreover, the front circumferential edge has formed a front annular rim section 30 therearound. The open front end of the frustoconical portion 26 is integrally connected to the open rear end of the small diameter cylindrical portion 22 at the first intermediate circumferential edge, and the open rear end of the frustoconical portion 26 is at the second intermediate circumferential edge It is integrally connected to the open front end of the large diameter cylindrical portion 24. The central passage 20 extends through the interior of the small diameter cylindrical portion 22, the large diameter cylindrical portion 24 and the frustoconical portion 26.

The annular body 14 has a cylindrical central portion 32, a front flange portion 34 and a rear flange portion 36 that provide a sound chamber 38. The front flange portion 34 of the annular body 14 includes a small diameter cylindrical section 40 and a frustoconical section 42 disposed between the small diameter cylindrical section 40 and the cylindrical central portion 32. The small diameter cylindrical portion 22 defines a second front opening 44. The body 12 and the annular body 14 can be manufactured as a unitary integral structure and are preferably made of rubber or elastomer.

The sheath 10 also includes a sound ring 46 that can be characterized as a ring having a central perforated disk or an annulus. The sound ring member 46 is made of an elastically compressible open cell foam material, i.e., the sound ring member 46 will return to its original shape after it has been compressed, such as polyurethane foam. The sound ring 46 is disposed within the cylindrical central portion 32 of the annular body 14 and surrounds a portion of the body 12, such as the large diameter cylindrical portion 24 of the body 12. The sound ring member 46 can be inserted into the sound chamber 38 formed by the cylindrical center portion 32, the front flange portion 34, and the rear flange portion 36 through the second front opening of the annular body 14. The sheath 10 includes a support ring 48 that projects longitudinally around the body 12, the support ring 48 being configured to space the sound ring 46 from the rear flange portion 36.

Without wishing to agree with any particular theory of operation, the acoustic chamber 38 of the sheath 10 provides an air cushion that absorbs acoustic energy from the engine chamber, through the wall of the frustoconical portion 26 of the sheath 10, and reduces or inhibits The enclosed space penetrates into the passenger compartment. The air cushion thus improves the noise shielding. Pass The open-cell foam of the sound ring 46 that absorbs most of the acoustic energy and provides additional noise attenuation further reduces or suppresses noise

While the embodiments described herein relate to use with wiring harnesses in automobiles or other motor vehicles, the sheath 10 described herein can be adapted for many other applications in which an elongated structure passes through a panel.

Accordingly, a sheath 10 is provided that is configured to mitigate noise transfer from one chamber to another and also prevent water and other contaminants from passing from one chamber to another. The acoustic chamber 38 of the sheath 10 reduces the noise transmitted from one chamber to the other, and the acoustic ring 46 within the sheath 10 further reduces noise. Further, when passing through a hole in the panel, the sheath 10 is easily deformed, making it easy to install in the panel. Thus, the wiring harness through the sheath 10 remains flexible within the chamber and is easier to transport.

While the invention has been described in terms of its preferred embodiments, it is not intended to Moreover, the use of the terms first, second, etc. does not denote any order of importance, but the terms first, second, etc. are used to distinguish one element from another. Moreover, the use of the terms one, one, etc. does not denote a limitation of the quantity, but rather the existence of at least one of the items mentioned.

Claims

A sheath (10) comprising:

a hollow body (12) having a first front opening (16), a rear opening (18) and a longitudinal extension from the first front opening (16) to a center of the rear opening (18) a channel (20) configured to receive an elongated structure;

An annular body (14) surrounding a portion of the body (12), spaced apart from the body (12) and integrally joined to the body (12), the ring body (14) a cylindrical central portion (32) providing a sound chamber (38), a front flange portion (34) and a rear flange portion (36);

A sound ring (46), the sound ring (46) being made of an open cell foam material and disposed within the central portion of the annular body (14) and surrounding a portion of the body (12).
The sheath (10) according to claim 1, wherein said body (12) comprises a small-diameter cylindrical portion (22), a large-diameter cylindrical portion (24), and a cylindrical body disposed in said small diameter a frustoconical portion (26) between the portion (22) and the large diameter cylindrical portion (24), wherein the small diameter cylindrical portion defines the front opening and the large diameter cylindrical portion ( 24) defines the rear opening (18).
The sheath (10) according to claim 2, characterized in that the sound ring (46) surrounds a section of the large diameter cylindrical portion (24).
The sheath (10) according to claim 1, wherein said front flange portion (34) of said annular body (14) comprises a small diameter cylindrical section (40) and is disposed at said small A frustoconical section (42) between the cylindrical section (40) and the cylindrical central portion (32), and wherein the small diameter cylindrical portion defines a second front opening.
The sheath (10) according to claim 4, wherein when the sound ring (46) is inserted into the cylindrical central portion (32), the second front opening is configured to receive The sound ring (46).
The sheath (10) according to claim 5, characterized in that the sound ring (46) is elastically compressible.
The sheath (10) according to claim 1, wherein the sheath (10) comprises a support ring (48) projecting longitudinally around the body (12), the support ring (48) ) It is configured to space the sound ring (46) from the rear flange portion (36).