JPH0361857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a strut mount insulator disposed at a mounting portion on the vehicle body side of a strut type suspension of an automobile.

BACKGROUND ART A conventional strut mount insulator 1 of this type has a generally cylindrical inner collar 3 and an outer collar 4 fixed to the inner and outer peripheries of a cylindrical rubber body 2, respectively, as shown in FIG. The inner collar 3 is fixed to one end of the strut rod 5 via a nut 6, while the outer collar 4 has a fastening flange 7 integrally formed at the outer end thereof via a bolt 8 and a nut 9. It is fixed to the vehicle body panel 10. Further, a seal lip 11 formed integrally with the rubber body 2 is disposed between the inner circumferential edge of the fixing flange 7 and the opening edge 10a of the vehicle body panel 10. It is designed to seal between 10 and 10.
In the figure, 12 is a cover attached to the opening edge 10a of the vehicle body panel 10, and 13 is an electric control device provided inside the cover 12 (for example, the
(Refer to Publication No. 206143).

Problems to be Solved by the Invention In the above conventional strut mount insulator 1, as shown in FIG. A seal lip 11 that is polymerized and arranged near the inner peripheral edge of the fixing flange 7
The tip thereof is brought into contact with the opening edge 10a of the vehicle body panel 10 to obtain a sealing effect. Therefore, when assembling the fastening flange 7 to the vehicle body panel 10, there is a risk that a portion of the tip of the seal lip 11 will be caught between the two parts 7 and 10 and be deformed or rolled over. As a result, the sealing performance deteriorates and the strut mount insulator 1
Water, dust, etc. can easily enter the interior.

Further, although the seal lip 11 can be integrally molded with the rubber body 2, it must always be formed at a location along the inner circumferential surface 4a of the outer collar 4, so that the position where the fastening flange 7 is formed is approximately fixed. Therefore, the degree of freedom in arranging the strut mount insulator 1 with respect to the vehicle body panel 10 is restricted.

Means for Solving the Problems The present invention has been devised in view of the above-mentioned conventional problems, and includes forming an accommodation groove for accommodating a seal lip on the inner peripheral side of a fastening flange, and A further feature is that a through hole is formed through which a portion of the rubber body flows out during molding.

According to the present invention having the above configuration, the tip of the seal lip protrudes from the receiving groove of the fastening flange, and one end surface of the vehicle body panel is pressed against the tip from the vertical direction. Therefore, the conventional situation where the seal lip gets caught between the vehicle body panel and the fixing flange or is turned over is completely eliminated, and the sealing performance can be improved. Furthermore, since the seal lip is formed by a part of the rubber body that has flowed out from the through hole during molding, not only can molding operations be facilitated by integral molding with the rubber body, but also
The degree of freedom in the formation position of the fastening flange is improved.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on FIG. In addition, the same reference numerals are attached to the same components as in the prior art, and redundant explanation will be omitted.

That is, in the figure, 2 is a cylindrical rubber body of the strut mount insulator 1, 3 and 4 are an inner collar and an outer collar, 7 is a fixing flange integrally formed at the lower outer end of the outer collar 4, and 10 1 is a vehicle body panel, and an annular housing groove 22 for housing a seal lip 21 is formed on the inner peripheral side of the fixing flange 7. The accommodation groove 22 has a substantially concave cross section, and a plurality of through holes 23 are formed in the lower wall thereof upward in the circumferential direction.

On the other hand, when the seal lip 21 forms the rubber body 2 that wraps around the lower surface of the lower wall of the housing groove 22 during molding, a part of the rubber material is formed in the through hole 22.
It flows into the storage groove 22 from there and is solidified and formed therein. Also, seal lip 2
1 includes an annular base 21 held within a housing groove 22;
The height of a is set slightly lower than the height of the housing groove 22, and a tip portion 21b integrally formed on the upper part of the base portion 21a and having an acute angle in cross section projects from the housing groove 22 in a substantially vertical direction. ing.

Therefore, according to this embodiment, the upper surface 7a of the fixing flange 7 is attached to the lower surface 1 of the vehicle body panel 10.
0b and tighten the bolts 8 and nuts 9, as shown in FIG. press together. Therefore, the sealing performance of the seal lip 21 is greatly improved compared to the conventional one.

Effects of the Invention As is clear from the above description, the strut mount insulator according to the present invention has an accommodation groove for accommodating the seal lip on the inner circumferential side of the fastening flange provided at the outer end of the outer collar. Because of this, the tip of the seal lip is absorbed into the housing groove and pressed against the end surface of the vehicle body panel from the vertical direction. Therefore, not only is a good sealing effect achieved by increasing the contact area of the seal lip against the vehicle body panel, but the seal lip is also prevented from getting caught or rolled up between the vehicle body panel and the fastening flange, unlike conventional methods. As a result, deterioration of sealing performance is prevented.

Moreover, since a through hole is formed in the peripheral wall of the housing groove through which a part of the rubber body flows during molding, not only is it possible to simplify the molding work by integrally molding the seal lip and the rubber body, but also the formation position of the fastening flange can be adjusted. The degree of freedom is improved, and the degree of freedom in arranging the strut mount insulator with respect to the vehicle body panel is also improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a strut mount insulator according to the present invention, and FIG.
The figure is a sectional view of a main part of this embodiment, and FIG. 3 is a sectional view showing a conventional strut mount insulator in use. 1...Strut mount insulator, 2
...Rubber body, 3...Inner collar, 4...Outer collar, 5...Strut rod, 7...Fixing flange, 10...Vehicle body panel, 11, 12...
Seal lip, 22... accommodation groove, 23... through hole.

Claims (1)

[Claims] 1. A cylindrical rubber body that is connected to the strut rod via an inner collar on the inner periphery, an outer collar provided on the outer periphery of the rubber body, and a cylindrical rubber body that is integrally formed on the outer end of the outer collar and that is fixed to the vehicle body panel. In the strut mount insulator, the strut mount insulator is equipped with a fastening flange to be attached to the strut mount, and a seal lip disposed between the fastening flange and the vehicle body panel. A strut mount insulator characterized in that a groove is formed and a through hole is formed in the peripheral wall of the housing groove into which a part of the rubber body flows during molding.