JP-7856054-B2 - sealing structure

JP7856054B2JP 7856054 B2JP7856054 B2JP 7856054B2JP-7856054-B2

Inventors

岡野昌之

Assignees

トヨタ自動車株式会社

Dates

Publication Date: 20260511
Application Date: 20230606

Claims (4)

When viewed from the front or rear of the vehicle , A sealing member is provided to seal the gap that occurs in the engine compartment of a vehicle, and has a recess cut out in the shape of a "U" with the inner side in the vehicle width direction being open to form a gap for cables to pass through, A sound-absorbing chamber is formed inside the sealing member, with an opening provided on the surface of the recess facing inward in the vehicle width direction , A sealing structure equipped with a seal.
The sound-dampening chamber is formed perpendicular to the surface of the recess facing inward in the vehicle width direction, according to claim 1.
When viewed from the front or rear of the vehicle, A sealing member is provided to seal the gap that occurs in the engine compartment of a vehicle, and has a recess cut out in the shape of a "U" with the inner side in the vehicle width direction being open to form a gap for cables to pass through, Three sound-dampening chambers are formed inside the sealing member, with openings provided on the surface facing inward in the vehicle width direction of the recess, the surface facing upward towards the vehicle, and the surface facing downward towards the vehicle, respectively. A sealing structure equipped with a seal.
The seal structure according to claim 3, wherein the three sound-dampening chambers are formed perpendicular to the surface of the recess facing inward in the vehicle width direction, the surface facing upward towards the vehicle, and the surface facing downward towards the vehicle.

Description

This invention relates to a sealing structure for noise transmitted to the vehicle cabin. Fender insulators, which are installed between the vehicle's pillar and fender to suppress noise such as tire cavity resonance caused by tire deformation during uneven driving and low-frequency noise generated by the wheel well during driving, have been conventionally known (see, for example, Patent Document 1). Japanese Patent Publication No. 2019-085057 This is a schematic front view showing the sealing structure inside the engine compartment according to the first embodiment.This is a schematic perspective view showing a sealing member constituting the sealing structure according to the first embodiment.This is a schematic front view showing a cross-sectional view of the sealing member constituting the sealing structure according to the first embodiment.This is a schematic perspective view showing the sealing member constituting the sealing structure according to the second embodiment.(A) A schematic perspective view showing the sealing member constituting the sealing structure according to the third embodiment. (B) An explanatory diagram showing the sound pressure reduction effect of the sealing structure according to the third embodiment.(A) A schematic perspective view showing a sealing member constituting the sealing structure according to the fourth embodiment. (B) A schematic perspective view showing a sealing member constituting the sealing structure according to the fifth embodiment. The embodiments of the present invention will be described in detail below with reference to the drawings. For convenience of explanation, in each figure, the arrow UP indicates the upward direction of the vehicle, the arrow RE indicates the rearward direction of the vehicle, and the arrow RH indicates the rightward direction of the vehicle. Therefore, in the following description, unless otherwise specified, the directions of up/down, front/back, and left/right refer to the up/down, front/back, and left/right directions of the vehicle. Furthermore, the left/right direction is synonymous with the vehicle width direction. <First Embodiment> First, the first embodiment will be described. As shown in Figure 1, the seal structure 20 according to the first embodiment consists of a seal member 22 provided in the engine compartment 12 of the vehicle 10, for example, on the upper part of the fender liner 14 and on the outside in the vehicle width direction of the cowl side member 16. The sealing member 22 is formed from an elastic material such as urethane foam to a predetermined thickness, and is shaped to substantially match the gap that occurs on the upper part of the fender liner 14 and on the outer side in the vehicle width direction of the cowl side member 16 when viewed from the front in the front-rear direction, so as to seal (fill) the gap. As shown in Figure 2, the front and rear walls of the sealing member 22 each have multiple grooves 24 extending in the vehicle width direction. In other words, the front and rear walls of the sealing member 22 each have multiple uneven surfaces when viewed from the vehicle width direction. This configuration allows for a reduction in the weight of the sealing member 22 compared to a configuration without grooves 24 (uneven surfaces). Furthermore, as shown in Figure 1, a sealing member 21 having the same function as the sealing member 22 is provided above the sealing member 22. Preferably, the lower wall of the upper sealing member 21 and the upper wall of the lower sealing member 22 are configured to be interlocked, for example. The upper sealing member 21 is fixed to the fender extension panel (not shown) by, for example, a clip (not shown). The sealing member 22 constituting the sealing structure 20 has a recess 26 formed as a notch to create a gap G through which cables 18 such as wire harnesses and washer hoses can pass. Specifically, a recess 26, roughly U-shaped in front view, is formed to a predetermined depth approximately in the vertical center of the inner side of the sealing member 22 in the vehicle width direction. The cables 18 within the engine compartment 12 are routed through this roughly U-shaped gap G provided by this recess 26. Note that the cables 18 passing through the gap G are not limited to the single cable shown in the illustration. Furthermore, as shown in Figures 2 and 3, a resonator-type sound-dampening chamber 30 is integrally formed inside the sealing member 22. Specifically, this sound-dampening chamber 30 is integrally formed by molding the sealing member 22 using a mold (not shown), and its opening 32 is located approximately in the center of the bottom surface 26A of the recess 26 in both the vertical and thickness directions. In other words, the opening 32 of the sound-dampening chamber 30 faces inward in the vehicle width direction. The sound-dampening chamber 30 is formed in a hollow, approximately cylindrical shape and includes a connecting section 34 th