TWI665111B - Multi-wiring-harness sound insulation pad - Google Patents

Abstract

The invention belongs to the field of automobile vibration and noise, and in particular relates to a multi-wire harness sound insulation pad. The present invention aims to solve the problem that in the case of limited space, the double-layer seal design between the various wiring harnesses cannot be realized. To this end, the present invention provides a multi-harness sound insulation mat. The multi-harness includes at least a first wire harness and a second wire harness. The multi-harness sound insulation mat is provided with a first through hole allowing a first wire harness to pass therethrough and a second wire harness passing through the same. The second through hole, wherein the multi-wire harness soundproofing pad is further provided with at least a first pre-cut in communication with the first through hole. The invention realizes the purpose of reducing the through-hole aperture in the multi-wire harness sound-insulating pad by setting a pre-cut on the multi-wire harness sound-insulating pad, and further reserves a sufficiently wide plane for the multi-wire harness sound-insulating pad.

Description

Multi-harness sound insulation mat

The invention belongs to the field of automobile vibration and noise, and in particular relates to a multi-wire harness sound insulation pad.

The noise level of a car is an important technical indicator for measuring the level of modern automobile manufacturing, especially for cars. The noise level inside the car is one of the important standards for measuring the quality of cars. For example, there are usually many openings on the front panel of a car, such as the use of pull wires, rods, pipes and wiring harnesses for manipulation, and the installation positions of pedals, steering column and other components. The sound insulation pad of the front wall of the car is an important sound insulation component of the entire vehicle. If the seal design is not handled properly, it will cause sound leakage in the front wall and affect the sound insulation effect of the car.

At present, the processing method of the wire harness passing through the openings of the front panel and the sound insulation pad is usually a double wall treatment method, that is, the two lips are pressed on the sheet metal and the sound insulation pad respectively. Specifically, after the sound insulation mat is first attached to the front panel of the car, viewed from the entirety of the two, one side is sheet metal and the other side is a sound insulation mat. The harness via plug has two lips (a first lip and a second lip). After the wire harness passes through the openings of the dash panel and the sound insulation pad, the first layer of lips is pressed against the sheet metal on one side of the dash panel, and the second layer of lips is pressed on the sound insulation mat on the other side, so as to achieve Sealing of front panel openings and soundproofing pad openings. In this way, in order to meet the pressing of the lip of the second layer with the sound insulation pad, it is required that the periphery of the hole on the sound insulation pad has a sufficiently wide plane. However, in the case of limited installation space, the double-wall sealing design of each wiring harness cannot be realized because the sound insulation mat cannot provide a sufficiently wide plane.

Specifically, since the wiring harness has a via plug, according to the traditional wiring harness via processing method, the hole diameter of the hole on the sound insulation pad needs to be larger than the outer diameter of the via plug, so that the wiring harness can pass through the front panel aperture and the sound insulation pad. Orifice design requirements. Due to the limited area of the front panel and the sound insulation pad, when the hole diameter on the sound insulation pad is too large, the holes on the sound insulation pad will be too dense between the holes, which will cause the remaining remaining plane area of the hole on the sound insulation pad to be insufficient, which cannot give the second The lip of the layer is pressed against the sound insulation pad to leave a wide enough plane. In other words, in the case where the center-to-center distance between the holes on the sound insulation pad is not changed, the larger the hole diameter, the smaller the distance between the holes, and the smaller the peripheral area of the holes, which makes it impossible to make each hole Harnesses are sealed to double walls. And if the hole diameter of the sound insulation mat is too small, it will make the wiring harness through holes difficult.

Therefore, there is a need in the art for a new sound insulation mat to solve the above problems.

In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the double-layer sealing design between the various wiring harnesses cannot be achieved under the condition of limited space, the present invention provides a multi-harness sound insulation pad, and the multi-harness includes at least a first wire harness And the second wiring harness, the multi-harness sound insulation mat is provided with a first through hole allowing the first wiring harness to pass therethrough, and the second wiring harness is provided with at least a first through hole communicating with the second wiring harness. Connected first pre-cut.

In a preferred embodiment of the multi-harness sound insulation pad described above, the aperture size of the first through hole can be set to only accommodate the first harness.

In a preferred embodiment of the multi-wire harness sound insulation pad, the first pre-cut is located between the first through hole and the second through hole.

In a preferred embodiment of the multi-wire harness soundproofing pad described above, the aperture of the second through-hole is larger than the aperture of the first through-hole; the first pre-cut is also in communication with the second through-hole.

In a preferred embodiment of the multi-wire harness sound insulation pad, the second wire harness has a first via plug, and the first via plug has a first lip that can be pressed on the multi-wire harness sound insulation pad.

In a preferred embodiment of the multi-wire harness sound insulation pad, in the assembled state, the first lip presses at least a part of the first pre-cut.

In a preferred embodiment of the multi-harness sound insulation pad, the multi-harness sound insulation pad is further provided with a second pre-cut that communicates with the second through hole.

In a preferred embodiment of the multi-wire harness soundproofing pad, there are two second pre-cuts, each extending to both sides of the first through hole, and the first pre-cut is located between the two second pre-cuts.

In a preferred embodiment of the multi-wire harness sound insulation pad, at least two first through holes are provided between the two second pre-cuts, and each of the first through holes communicates with the second through-holes through the respective first pre-cuts respectively. .

In the above preferred embodiment of the multi-harness sound insulation pad, a second via plug is sleeved outside the first wire harness, and the second via plug has a second lip that can be pressed on the multi-harness sound insulation pad, and is assembled. In the state, the second lip presses at least a part of the first pre-cut.

In the technical solution of the present invention, the purpose of reducing the through-hole aperture of the multi-harness sound insulation mat is achieved by providing a pre-cut in the multi-harness sound insulation mat, and then a sufficiently wide plane is reserved for the multi-harness sound insulation mat. Specifically, through the steps of “installing the first wiring harness, then installing the sound insulation pad, and finally installing the second wiring harness”, after the first wiring harness passes through the through-hole plug, the first pre-notch can be used to enter the first through-hole. This allows the through-holes reserved for the first wiring harness of the multi-harness sound insulation mat to be designed to accommodate only the outer diameter of the first harness, without having to consider the size of the hole plugs on the periphery of the harness, thereby reducing the through-holes on the multi-harness sound insulation mat. The aperture achieves the purpose of leaving a sufficiently wide plane for the multi-harness sound insulation pad. As the through-holes on the multi-harness become smaller, the sound leakage can be effectively reduced. In addition, by pressing the lip of the first via plug that is finally installed against the multi-harness sound insulation pad, especially the first pre-cut and the second pre-cut of the sound insulation pad, the multi-harness sound insulation pad and the front wall of the car are ensured. The fit of the board.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the various components in the drawings are drawn at a specific scale, this proportional relationship is merely exemplary, and those skilled in the art can adjust it as needed to suit specific applications. It should be noted that the terms “first”, “second”, and “third” in the present invention are only used for description purposes, and cannot be understood as indicating or implying relative importance.

In the present invention, the multi-harness includes at least one first harness and at least one second harness, and a diameter of the first harness is smaller than a diameter of the second harness. The multi-harness soundproofing pad of the present invention is provided with a first through hole that allows a first wire harness to pass through and a second through hole that allows a second wire harness to pass through. For the convenience of description, the first wiring harness is collectively referred to as a small wiring harness, and the second wiring harness is collectively referred to as a large wiring harness. Correspondingly, the aperture of the first through-hole for small wire harnesses to pass through is smaller than the aperture of the second through-hole for large wire harnesses to pass through.

The structure of the multi-harness sound insulation pad of the present invention is described below with reference to FIG. 1.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a partial structure of a multi-harness sound insulation pad of the present invention. As shown in FIG. 1, in this embodiment, the multi-harness sound insulation pad 1 is provided with a first through hole 11 (two first through holes 11 are shown in FIG. 1) and a large wire harness are allowed to pass through the small wire harness. The second through hole 12 passed through (only a part of the second through hole 12 is shown in FIG. 1). In order to reduce the aperture of the through hole on the multi-harness sound insulation pad 1, the multi-harness sound insulation pad 1 of the present invention sets the aperture size of the first through hole 11 to only accommodate a small wire harness. Since the first through-hole 11 is small enough, in order to allow the small wiring harness to pass through the first through-hole 11 smoothly, the multi-harness sound insulation pad 1 is provided with a first pre-cut 13 (shown in FIG. 1) communicating with the first through-hole 11. Two first pre-cuts 13 are made, and each first pre-cut 13 is in communication with a corresponding first through-hole 11). When the small wire harness passes through the first through hole 11, to a certain extent, the first through hole 11 can be expanded and deformed at the first pre-cut 13 to facilitate penetration of the small wire harness.

In some embodiments, a plurality of first pre-cuts may be provided on the periphery of each first through hole 11.

Further, considering that the thickness of the sound insulation pad is relatively thick, and at the same time, due to the sealing performance of the sound insulation pad, the first pre-cut 13 should not be made too long. When the first pre-cut 13 is small, it is difficult to expand the first through hole 11. For this reason, in this embodiment, the other end of the first pre-cut 13 is communicated with the second through-hole 12, that is, the first through-hole 11 and the second through-hole 12 are communicated through the first pre-cut 13. Therefore, the small wire harness can first penetrate the second through hole 12 with a relatively large aperture, then enter the first pre-cut 13 from the second through hole 12, and finally enter the first through hole 11. This makes installation easier.

The position of the first pre-cut 13 relative to the first through-hole and the second through-hole can be set in different ways, as long as the two are connected. Preferably, the first pre-cut 13 is located between the first through hole 11 and the second through hole 12. In this way, the length of the first pre-cut 13 can be avoided.

As shown in FIG. 1, the first through hole 11 has two or more, and they are all located on the same side of the second through hole 12, and a small wire harness is passed through each of the first through holes 11.

In order to further improve the convenience of installation of the small wire harness, a second pre-notch 14 communicating with the second through hole 12 is further provided on the sound insulation pad. In FIG. 1, a second pre-cut 14 is provided on each side of the second through hole 12, and the direction of the cut is downward (the orientation shown in FIG. 1). The two second pre-cuts 14 respectively extend to two sides of the first through-hole 11, and the first through-holes 11 are located between the two second pre-cuts 14.

In the process of installing the small wiring harness into the first through-hole 11, first open the multi-harness sound insulation pad 1 in the direction of the second pre-cut 14 to expand the aperture of the second through-hole 12. A plurality of small wiring harnesses are easily passed through the second through hole 12. In addition, after the multi-harness sound insulation mat 1 is opened in the direction of the cut of the second pre-cut 14, the aperture of the second through hole 12 is large enough for the staff to organize the small harness, and the staff can pass the small harness through After the second through-holes 12 are finished, the small wire harnesses are passed through the respective first pre-cuts 11 into the first through-holes 11. After the small wire harness penetrates the first through hole 11, the turned-back soundproof cushion part is returned, and finally the large wire harness is penetrated into the second through hole 12.

In this embodiment, the multi-harness sound insulation pad 1 is arranged on the inner side of the front panel of the car, that is, the side facing the passenger compartment, and the large and small wiring harnesses pass from the front compartment side to the passenger compartment side, that is, from the front panel to Acoustic pads. FIG. 2 shows a partial structural diagram of a front panel of a car. The situation when the multi-wire harness sound insulation mat 1 of the present invention is applied to a front panel of an automobile is described below with reference to FIGS. 1 and 2.

As shown in FIG. 2, in this embodiment, two third through holes 21 (corresponding to the first through holes 11 on the multi-harness sound insulation mat 1) are provided on the front panel 2 of the car corresponding to the multi-harness sound insulation mat 11. ) And a fourth through hole 22 (corresponding to the second through hole 12 on the multi-harness sound insulation pad 1). Among them, each third through hole 21 can be penetrated by a small wire harness 3 (two small wire harnesses 3 are shown in FIG. 1), and the fourth through hole 22 can be passed by a large wire harness 4 (omitted in FIG. 1) With the large wire harness 4, the large wire harness 4) is clearly shown in FIG.

The large wiring harness 4 is covered with a first via plug 41 (see FIG. 3). The first via plug 41 has a first lip 411, which is provided on the side of the sound insulation pad 1 facing away from the front panel. And pressed on the multi-harness sound insulation mat 1. Specifically, after the large wire harness passes through the fourth through hole 22 on the front panel 2 of the car and the second through hole 12 on the multi-harness sound insulation pad 1 in sequence, the first lip 411 of the first via plug 41 can Pressed on the multi-harness sound insulation pad 1 to seal the large wire harness and the second and fourth through holes and protect the large wire harness. At the same time, the first lip 411 also presses at least a portion of the second pre-cut 14 to prevent the sound insulation pad from turning at the edge of the second pre-cut 14.

Further, the first lip 411 of the first via plug 41 is also pressed against at least part of the first pre-cut 13 at the same time, so as to prevent the sound insulation pad from turning at the edge of the first pre-cut 13.

A through hole plug 31 is installed on the third through hole 21 of the front panel of the automobile. The through hole plug 31 is adapted to the third through hole 21, and both ends of the through hole plug 31 have lips. The through hole plug 31 is installed. After the third through hole 21, the lips at both ends of the third through hole 21 are respectively pressed against the two sides of the front panel of the automobile. The small wire harness 3 passes through the third through hole 21 of the front panel of the automobile through the through hole plug 31. The through hole plug 31 can play a role of sealing between the small wire harness and the third through hole and protecting the small wire harness.

In the installation process, first pass the small wire harness 3 through the through-hole plug 31 installed on the third through hole 21 of the front panel of the car, and then attach the multi-wire harness sound insulation pad 1 to the front panel 2 of the car, so that The through hole of the wire harness soundproof pad 1 corresponds to the through hole on the front panel 2 of the car, and the small wire harness 3 is passed into the second through hole 12, and then the small wire harness 3 is connected to the first through hole 11 and the second through hole A first pre-cut 13 of 12 enters the first through hole 11. Specifically, in the operation of passing the small wire harness 3 through the first through hole 11, the multi-wire harness sound insulation pad 1 is first directed in a downward direction of the second pre-cut 14 provided on both sides of the second through hole 12 (as shown in FIG. 1 (Shown in the direction shown), so that the aperture of the second through hole 12 is enlarged, so that the small wiring harness can pass through the second through hole 12 and the staff can organize the small wiring harness 3. After finishing the small wiring harness 3 by the staff, the small wiring harness 3 is passed into the first through hole 11 through the respective first pre-cuts 11. After all the small wire harnesses 3 have entered the first through hole 11, the multi-wire harness sound insulation pad 1 is turned back in the upward direction of the second pre-cut 14 (the direction shown in FIG. 1). After turning back, make the multi-harness sound insulation pad 1 and the car front panel 2 completely fit, so that the first and second through holes and the car front panel 2 are aligned, and then the large wire harness 4 (with the first A via plug 41) passes through the fourth through hole 22 on the front panel 2 of the automobile and the second through hole 12 on the multi-harness sound insulation pad 1 in this order. After the first via plug 41 passes through the second through hole 12, the first lip 411 on the first via plug 41 is pressed against the first pre-cut 13 and the second pre-cut 14, respectively.

It should be noted that the first via plug 41 mentioned above belongs to a well-known component in the art, and it will not be described in detail here. Those skilled in the art may select a suitable first via plug 41 according to the hole diameter of the second through hole, so that it satisfies the following characteristics: the first via plug 41 serves as a seal between the large wiring harness and the fourth through hole, and Protect the role of large wiring harness. In addition, the first lip 411 of the first via plug 41 is pressed against the first pre-cut 13 and the second pre-cut 14 on the multi-wire harness sound insulation pad 1. Although not pointed out, those skilled in the art can understand that the first via plug 41 also has another lip, and the other lip is pressed against the inner side of the front panel of the automobile.

In this embodiment, on the one hand, by opening a first pre-cut 13 communicating with the first through-hole 11 and the second through-hole 12, the small wire harness 3 passes through the second through-hole 12 and the first pre-cut 13 in order and enters the first A through hole, thereby reducing the required hole diameter of the first through hole 11, so that the hole diameter of the first through hole 11 can be reduced to be substantially consistent with the outer diameter of the small wire harness. Since the hole diameter of the first through hole 11 becomes smaller, in a case where the center distances between the first through hole 11 and the second through hole 12 are not changed, the space between the first through hole 11 and the second through hole 12 is reserved. The area of the sound insulation pad becomes larger, that is, the area of the sound insulation pad around the second through hole 12 becomes larger, so that the first lip 411 can be pressed on the plane of the sound insulation pad around the second through hole 12. The problem of interference between the first lip 411 and the first through hole 11 caused by the first through hole 11 and the second through hole 12 being too close is avoided.

On the other hand, the first lip 411 of the first via plug 41 is used to press the first and second pre-cuts at the same time, so as to avoid the situation where the cuts of the first pre-cut 13 and the second pre-cut 14 are easily warped. .

In some embodiments, since the second pre-cut 14 is in communication with the second through-hole 12, the hole diameter of the second through-hole 12 can also be reduced. At this time, when the first via hole plug 41 needs to pass through the second through hole 12, the multi-harness sound insulation pad 1 is directed in a downward direction of the second pre-cut 14 provided on both sides of the second through hole 12 (FIG. 1). Direction shown in the figure), so that the aperture of the second through hole 12 is enlarged so that the first via plug 41 passes through the second through hole 12. After passing through, the multi-harness sound insulation pad 1 is turned back in the upward direction of the second pre-cut 14 (the direction shown in FIG. 1). Therefore, on the premise of reducing the aperture of the second through hole 12, it is ensured that the first via plug 41 can pass through the second through hole 12 smoothly. By reducing the second through hole 12, the reserved area between the through holes on the multi-wire harness sound insulation mat 1 can be further increased.

In some embodiments, when a sufficient plane can be reserved around the first through hole 11 on the multi-wire harness soundproofing pad 1, a second via plug that penetrates the first through hole 11 can also be provided on the small wire harness 3. (Not shown in the figure), the second via plug has a second lip that can be pressed on the multi-wire harness sound insulation mat 1. In the assembled state (the small wire harness passes through the first through hole 11 and the large wire harness passes through the second through hole 12), the second lip of the second via plug can press the first pre-cut 13 further, which further improves Sound insulation effect of the multi-harness sound insulation mat 1. In this embodiment, a person skilled in the art may select a suitable second via plug according to the aperture of the first through hole, so that it satisfies the following characteristics: making the second via plug act as a small wire harness and a third through hole. Seal and protect the small wiring harness. In addition, the second lip of the second via plug is pressed against the first pre-cut 13 of the multi-harness sound insulation pad 1. Although not pointed out, those skilled in the art can understand that the first via plug 41 also has another lip, and the other lip is pressed on the side of the front panel of the car facing away from the sound insulation pad. At this time, since the second via plug provided on the small wire harness can also serve as a seal between the small wire harness and the third through hole and protect the small wire harness, there is no need to provide a through hole on the front panel of the car Conce 31.

It should be noted that the idea of the present invention is to minimize the through hole for the small wire harness to pass through on the multi-wire harness soundproofing pad 1. In the case that the through hole is reduced, the purpose of the wire harness entering the through hole is achieved through pre-cutting. Therefore, the multi-harness sound insulation mat 1 of the present invention is not limited to the case defined in the above embodiments. For example, in the above embodiment, although the multi-harness sound insulation pad 1 has two first through holes 11 and one second through hole 12, those skilled in the art may set different numbers of the first through holes 11 according to an actual application scenario.和 第二 通 孔 12。 And the second through hole 12. In addition, in this implementation, the wiring harnesses that pass through the multi-harness sound insulation pad 1 are divided into two types: large wiring harnesses and small wiring harnesses (that is, the large wiring harnesses and the small wiring harnesses are collectively referred to, and the specific diameters of the wiring harnesses are not specifically defined). It is also possible to have different diameters, as in this embodiment, the small wire harnesses passing through the two first through holes 11 have different diameters. In other words, the first wiring harness can be understood as a small wiring harness group containing one or more small wiring harnesses, and the second wiring harness can be understood as a large wiring harness group containing one or more large wiring harnesses.

In addition, the structure of the multi-harness sound insulation mat 1 of the present invention is designed to leave a sufficiently wide plane for the periphery of the through hole on the multi-harness sound insulation mat 1 to meet the first lip 411 of the second hole plug 41 to press the multi-harness sound insulation mat. 1 requirements. Therefore, the application scene of the multi-harness sound insulation mat 1 of the present invention is not limited to the front panel of a car. In other application scenarios (for example, when a sufficiently wide plane is required for the multi-harness sound insulation mat 1), the multi-harness sound insulation of the present invention The pads also work.

In summary, through the structural design of the multi-harness sound insulation mat of the present invention, that is, the method of providing a pre-cut in the multi-harness sound insulation mat to achieve the purpose of reducing the hole diameter of the multi-harness sound insulation mat, so that between the through-holes on the multi-harness sound insulation mat The area of the sound insulation pad becomes larger, thus leaving a sufficiently wide plane for the multi-harness sound insulation pad. It is precisely because the area of the sound insulation pad between the through holes on the multi-harness sound insulation pad becomes larger, that is, the area of the sound insulation pad around the through hole becomes larger. When the via plug is used to seal the through hole on the sound insulation pad, the lip of the via plug The edges can be pressed tighter on the sound insulation pad, which can effectively reduce the sound leakage.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings. However, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical solutions after these changes or replacements will fall into the protection scope of the present invention.

1‧‧‧ multi-harness sound insulation mat

11‧‧‧The first through hole

12‧‧‧Second through hole

13‧‧‧first pre-incision

14‧‧‧Second pre-incision

2‧‧‧car front panel

21‧‧‧Third through hole

22‧‧‧ Fourth through hole

3‧‧‧Small wiring harness

31‧‧‧through hole plug

4‧‧‧ Large Harness

41‧‧‧The first via

411‧‧‧first lip

FIG. 1 is a schematic diagram of a partial structure of a multi-harness sound insulation pad of the present invention. FIG. 2 is a partial structural diagram of a front panel of an automobile according to the present invention. FIG. 3 is a schematic structural diagram of the multi-harness sound insulation pad of the present invention when assembled.

Claims (8)

A multi-harness sound insulation pad, the multi-harness includes at least a first wire harness and a second wire harness, including: the multi-harness sound insulation mat is provided with a first through hole allowing the first wire harness to pass therethrough and allowing the second wire harness to pass through A second through hole, wherein at least a first pre-cut communicated with the first through hole is provided on the multi-wire harness soundproof pad, and the first pre-cut is located in the first through hole and the second through hole Between; the diameter of the second through hole is larger than the diameter of the first through hole; and the first pre-cut is also in communication with the second through hole. The multi-harness sound insulation mat as described in claim 1, wherein an aperture size of the first through hole can be set to only accommodate the first wire harness. The multi-wire harness sound-insulating pad according to claim 1, wherein the second wire harness jacket has a first via plug, and the first via plug has a first lip that can be pressed on the multi-wire harness sound-proof pad. The multi-wire harness sound insulation pad according to claim 3, wherein in the assembled state, the first lip presses at least a part of the first pre-cut. The multi-harness sound insulation mat according to any one of claims 1 to 4, wherein the multi-harness sound insulation mat is further provided with a second pre-notch communicated with the second through hole. The multi-wire harness sound-insulation pad according to claim 5, wherein the second pre-cut has two and extends to both sides of the first through hole, and the first pre-cut is located between the two second pre-cuts. The multi-harness sound insulation pad according to claim 6, wherein at least two first through holes are provided between the two second pre-cuts, and each of the first through holes passes through the respective first pre-cuts and The second through hole communicates. The multi-harness sound insulation pad according to any one of claims 1 to 4, wherein the first wire harness is further sleeved with a second via plug, and the second via plug has a A second lip, and in the assembled state, the second lip presses at least a part of the first pre-cut.