JPH0740463Y2 - Vehicle panel damping structure - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a vehicle panel damping structure for suppressing vibration of a vehicle panel, for example, a partition wall for partitioning an engine room from a vehicle compartment, a floor panel, a panel around a tire house, and the like.

[Prior art]

A conventional vibration damping structure of this type is, for example, SAIKAI Sho 59-31.
There is a Dash-Insulator disclosed in Japanese Patent No. 539. In this dash-in insulator, a dash-in insulator composed of a main body and a skin material is fixed by bolts and nuts through a spacer having a collar portion. The duty insulator disclosed in Japanese Utility Model Laid-Open No. 59-31539 has a problem that a lean hose cannot be provided on the insulator mounting side of the duty panel for improving damping characteristics and shifting the increased resonance point. There is a point. On the other hand, as shown in FIG. 4 and FIG. 5, the lean hoses 2A to 2C that divide the surface are welded to the surface of the dash panel 1 and the lean hoses 2A to 2C are also welded. There is a part in which four insulators 5 each including an asphalt layer 3 and a constraining layer panel 4 for constraining the asphalt layer 3 are attached to the uninsulated portion.

[Problems to be solved by the device]

The vibration damping structure of the conventional dash panel shown in FIG. 4 and FIG. 5 has a structure in which the lean hoses 2A to 2C cross the surface of the dash panel 1. Cannot attach the insulator 5. Also, it is not possible to attach the asphalt layer on the back side of the lean hoses 2A-2C. Therefore, there are problems that the noise is transmitted and the damping effect of the asphalt layer 3 is reduced in the lean hoses 2A to 2C. In addition, the rear side of the dash panel 1 is lean reinforcement 2A ~
Since it is divided by 2C, there is a problem that the number of parts of the asphalt layer 3 and the constraining layer panel 4 increases, and the manufacturing cost increases. The present invention has been made in view of the above-mentioned conventional problems. A damping material is attached to the rear side of the lean hosement to suppress the passage of sound through the panel and to increase the damping effect. Another object of the present invention is to provide a vehicle panel vibration damping structure capable of reducing manufacturing costs.

[Means for Solving the Problems]

This invention is integrally provided with a bead-shaped lean reinforcement portion on one surface of a vehicle panel, and a damping material is attached to the one surface, and is laminated on the outside of the damping material. In a vehicle panel damping structure in which a damping material constraining layer panel is adhered, the damping material and the damping material constraining layer panel respectively continuously cover substantially the entire one surface of the vehicle panel. With a single-layer structure, the lean hose portion is continuously and integrally formed as a part of the damping material constraining layer panel, and from the lean hose portion to the damping constraining layer panel. The connecting portion is a concave seat protruding to the back surface side, the damping material is provided with a through hole through which the concave seat penetrates, and the concave seat is passed through the through hole so that one of the vehicle panels The above object is achieved by bonding to the surface.

[Action and effect]

In this invention, the damping material is also attached to the back side of the lean hosement part that partitions the panel surface, thereby improving the damping characteristics by the lean hosement part and ensuring the function of shifting the increased resonance point. Suppresses the transmission of sound from the hosement part, further increases the damping effect of the panel by the damping material, and the number of parts and manufacturing by damping the damping material and the damping material constrained layer panel It is intended to reduce the cost. The single-layer damping material restraint layer panel with an integrated lean reinforcement part can be easily installed by connecting the recessed seat to the vehicle panel through a through-hole formed in the damping material in advance. You can

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIGS. 1 and 2, an asphalt layer 12 that is attached to substantially the entire front surface of a dashboard panel 10 that separates an engine room and a vehicle compartment of a vehicle (all not shown), Along with integrally providing lean hosement portions 14A to 14C that are convex in a bead shape on the surface, of the lean hosement portions 14A to 14C, at positions vertically adjacent to the horizontal lean hosement portions 14A and 14B, A damping material constraining layer panel 18 having a plurality of recessed seats 16 protruding to the back surface side, penetrating the asphalt layer 12, and being welded to the surface of the dash panel 10 is provided. In the figure, reference numeral 20 is a tow board, and 22 is this toe board 20.
A cross member and a tunnel portion, which are integrally welded to the back side of the, form a closed cross section, and 24 respectively. The lean hosement 14C is formed between the lean hosement portions 14A and 14B that horizontally traverses the dash panel 10 in the vehicle body width direction central position, and extends upward from the upper end of the tunnel part 24 to form the dash panel 10 on the vehicle body. It is configured to be divided in the width direction. Further, these lean hoses 14A to 14C are formed by projecting a part of the damping material constraining layer panel 18. Further, the asphalt layer 12 has a through hole 12A formed at a position corresponding to the recess 16 in advance. When assembling the above damping structure, first, the asphalt layer 12 is formed on the damping material constraining layer panel 18, and the through hole 12A has a concave seat 16A.
And is attached to the back surface of the damping material constraining layer panel 18 so as to be fitted to. Next, the asphalt layer 12, which is a sub-assembly, is attached to a required position of the dash panel 10, and at the position of the recessed seat 16,
The damping material constrained layer panel (18) is spot welded to the surface of the dash panel (10). This completes the damping structure. In this example, the asphalt layer 12 which is a damping material is used.
Will be attached to the entire surface of the dashboard panel 10, and the asphalt layer 12 will also be attached to the back side of the lean reinforcement parts 14A to 14C.
Since it is covered with the asphalt layer 12, the asphalt layer 12 is seamless, and accordingly, the vibration damping effect and the sound transmission suppressing effect are significantly increased. Further, the lean hoses portion 14A to 14C are substantially the same as the conventional one shown in FIG.
It contributes to the improvement of the damping characteristic and the shift of the increased resonance point. Further, the asphalt layer 12 and the damping material constrained layer panel 18 each have a single-layer structure, and further, lean leanment portions 14A to 14C.
Since it is also formed integrally with the damping material constraining layer panel 18, it is possible to reduce the number of parts, the number of manufacturing steps, and the manufacturing cost. Further, in this embodiment, the recessed seats 16 penetrating the asphalt layer 12 at a plurality of positions also serve as a spacer for maintaining a gap for the asphalt layer 12 and a function of preventing the asphalt layer 12 from hanging down. It becomes easy to maintain the damping effect of. In the above embodiment, the recessed seats 16 are provided only at positions vertically adjacent to the horizontal lean hose portions 14A and 14B, but this is also provided on both sides of the vertical lean hose portion 14C. You may do it. In this way, the effect of restraining the asphalt layer 12 by the damping material restraint layer panel 18 is increased. Further, the above embodiment relates to the dash panel 10 for separating the engine room and the vehicle compartment, but the present invention is not limited to this, and the floor panel, the panel around the tire house, the vehicle compartment and the rear trunk room. It is generally applied to a panel such as a partition wall that needs to suppress vibration and noise. Although the above embodiment uses asphalt damping material, the present invention is also applicable to the case where another damping material such as synthetic resin or rubber is used.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a vehicle panel damping structure according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is an enlarged sectional view showing a portion III in FIG. 2, FIG. 4 is a perspective view showing a conventional vehicle panel damping structure, and FIG. 5 is a sectional view taken along line VV in FIG. It is a figure. 10 ... Dashyu panel, 12 ... Asphalt layer, 12A ...
… Through hole, 14A-14C …… Lean hosement part, 16 ……
Recessed seat, 18 ... Damping material constraining layer panel.

Claims (1)

[Scope of utility model registration request] 1. A bean-like lean reinforcement portion is integrally provided on one surface of a vehicle panel, and a damping material is attached to the one surface, and the damping material is attached to the outside of the damping material. In a vehicle panel damping structure in which damping material constraining layer panels are adhered in layers, the damping material and damping material constraining layer panel are each continuously formed over substantially the entire one surface of the vehicle panel. In addition to having a single-layer structure for covering, the lean hose portion is continuously and integrally formed as a part of the damping material constraining layer panel, and from the lean hose portion, the damping constraining layer panel is formed. To the rear surface side, the damping member is provided with a through hole through which the recessed seat penetrates, and the recessed seat is passed through the through hole, and one side of the vehicle panel The vibration control structure of the vehicle panel, which is characterized in that it is connected to the surface of the vehicle.