JPS6021286Y2 - External noise prevention device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle external noise prevention device that covers the lower part of a vehicle's drive system with an undercover.

Installing an undercover that covers the lower part of the drive system, which is the main source of noise in a vehicle, is an extremely effective measure to prevent noise from outside the vehicle, and some have been used in the past, but it is troublesome to attach and remove the undercover, making it difficult to maintain. there were.

In addition, in consideration of this point, a device has been devised in which the undercover can be attached and detached with a single touch operation, but this has caused a new problem in that the sealing performance of the cover mounting portion is poor.

The present invention has been devised in view of the above-mentioned conventional circumstances, and provides an external noise prevention device in which the undercover that covers the lower part of the drive system can be attached and removed extremely easily, has excellent sealing properties, and is highly effective in preventing noise. It is.

The present invention will be described in detail below based on illustrated embodiments.

In FIG. 1 showing one embodiment, a cover attachment opening 1a is provided in a front bumper 1 of a vehicle at a central portion located in front of both side frames 2A and 2B.

On the other hand, an undercover 3 that is attached to cover the lower part of a drive system such as an engine and a transmission of a vehicle is formed as follows.

That is, the undercover 3 is formed of a cover main body 3A and a front panel 3B fixed to the front end surface thereof.

The cover main body 3A, which is curved in a U-shape in cross section and drawn into a deep dish shape at the front end, has a sealing flange portion 3a close to the front surface of the engine mounting bracket 4 at the rear end.
is molded so as to extend outward from the U-shaped cross section, while mounting flange portions 3c*3d with bolt insertion holes 3b that overlap the upper surfaces of the lower flanges of the frames 2A and 2B on both sides of the vehicle, respectively, are formed outward in the horizontal direction. Extend, shape and φ.

Further, the front panel 3B has a closing portion that closes off the upper part of the cover attachment opening 1a of the front bumper 1, and a portion below the closing portion that is located in front of the U-shaped cross section of the cover body 3A is open.
An air intake port 3 with a mesh grille 3e attached to the opening.
f and fixed to the front end surface of the cover main body 3A by welding or the like.

In order to attach the under cover 3 having such a configuration, the cover 3
Insert the rear end through the cover mounting port 1a and attach the flanges 3 on both sides.
c and 3d are overlapped with the upper surfaces of the frames 2A and 2B, respectively, and pushed in while sliding backwards until the front panel 3B abuts on the front bumper 1.

Then, bolts 5 are inserted into the bolt insertion holes 3b and 2a of the undercover 3 and the frames 2A and 2B, which overlap at this position.
through it and tighten it with nuts 6 to fix the undercover 3.

In this case, if the nut 6 is overlapped with the bolt insertion hole 3b and bonded to the upper surfaces of the flanges 3c and 3d on both sides in advance, the bolt 5
This simplifies the fastening work.

With such a configuration, the undercover 3 is connected to the cover attachment opening 1a.
It can be attached and detached by taking it in and out in the front and back direction from the frame 2A, especially the flanges 3c and 3d on both sides.

Since the structure is such that the cover is fastened after being superimposed on the top surface of 2B and supported in a stable state, it is extremely easy to attach and remove the cover compared to the conventional method in which the under cover, which is generally quite large and heavy, is supported from below and fastened. This greatly improves the ease of inspection and maintenance of the drive system, and
Even if the bolts etc. become loose, the cover can be prevented from falling, providing excellent safety.

Also, in the past, there was a structure in which the flanges on both sides of the undercover were simply overlapped and fastened to the top surface of the frame, but in this case, the flanges were pushed into the narrow gap between the frame and the lower surface of the drive system, and the flanges were pressed onto the top surface of the frame. Whereas the work required to polymerize the material was extremely troublesome, the work of the present invention is extremely simple, just putting it in and taking it out from the front.

Furthermore, since the undercover 3 is positioned at a position where the front panel 3B abuts the bumper 1, the troublesome positioning work is also eliminated.

Of course, it goes without saying that the Untacover 3 is fully equipped with the function of preventing noise outside the vehicle, which is the original function, and in particular, the flange parts 3cw3d on both sides can be attached closely to the upper surfaces of the frames 2A and 2B, and the flange part at the rear end. By mounting 3a close to the engine mounting bracket 4, leakage of noise to the sides of the vehicle can be effectively sealed, and the noise prevention function is also improved.

Furthermore, since the air intake port 3f is provided on the front side of the undercover 3, air can be taken in well, and the drive system can be cooled sufficiently effectively by the air flowing inside the cover 3 in contact with the lower part of the drive system. Ru.

Furthermore, since the cover attachment opening 1a of the front bumper 1 is covered by the front panel 3B, it looks smart and does not spoil the aesthetics.

FIG. 2 shows a second embodiment, in which the cover main body 3A of the undercover 3 is formed in the same manner as in the previous embodiment, but the front portions of both side walls are opened, and the front panel 3B has a mountain-shaped shape as shown in the figure. Air intake ports 3f are opened on both sides of the cover body 3A, and these air intake ports 3f are connected to openings in both side walls of the cover main body 3A by triangular duct members 3g.

On the other hand, a chevron-shaped cover attachment opening is opened in the center of the front surface of the front bumper 1 in correspondence with the shape of the front panel 3B, and the undercover 3 inserted through the cover attachment opening is fastened onto the frame in the same manner as described above.

In this case, cooling air is taken into the inside of the amplifier cover 3 from the air intake ports 3f on both sides through the respective duct spaces.

Other functions are the same as in the previous embodiment.

In the above embodiments, if a sound absorbing material is attached to the inner wall of the undercover 3 or the inner wall of the duct member 3g, the noise prevention function outside the vehicle can be further improved.

As explained above, according to the present invention, the undercover is inserted through the cover attachment hole formed in the front bumper, and the flange portions on both sides are slid onto the top surface of the frame while being pushed in and then fastened. It is extremely easy to perform inspection and maintainability, and the structure in which both flanges are closely attached to the frame satisfies the original function of preventing noise outside the vehicle.

Furthermore, since air can be effectively taken in through the air intake port opened on the front surface of the cover, the cooling function is sufficiently satisfied, and various other excellent features are provided.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, where A is a perspective view showing the vehicle body side structure, B is a perspective view showing the undercover structure, C is a side view showing the undercover installed state, and D is the undercover installed state. FIG. 2 is a perspective view showing a second embodiment of the present invention. 1...Front bumper, 1a...Cover installation port, 2A, 2B...Frame, 2a...
...Bolt insertion hole, 3...Under cover
3b... Bolt insertion hole, 3c, 3d...
・Flange part, 3f...Curved air intake, 3g...
・Duct parts.

Claims (2)

[Scope of utility model registration request] (1) A cover installation opening is provided in the front portion of the frame on both sides of the vehicle in the front bumper, and an undercover with a downwardly convex U-shaped cross section is provided that is inserted through the cover installation opening and covers the lower part of the vehicle's drive system. Both side edges of the top end of the undercover are extended outward to form both side flange parts which are overlapped and removably fixed onto the lower flange parts which are extended to the inside of the frame on both sides of the vehicle, and which are attached to the front side of the undercover. A vehicle exterior noise prevention device characterized by an air intake. (2) The undercover consists of a cover body and a front panel that is fixed to the front surface of the cover body and comes into contact with the front bumper while covering the cover mounting opening when the undercover is installed, and an air intake port is provided in the front panel. A vehicle exterior noise prevention device as set forth in claim (1) of the utility model registration claim.