JP2500281B2 - Spring seat travers - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring seat rubber of a strut suspension.

[0002]

2. Description of the Related Art In strut suspensions,
There is a structure in which a spring seat rubber is interposed on the upper side of the strut suspension, that is, a spring seat at the vehicle body side connecting portion, and the spring seat rubber is provided with a vibration damping effect.

FIG. 5 shows the structure of the upper portion of the strut suspension. A shell 3 is fastened and fixed by a nut 4 to an upper end portion of a piston rod 1A of a shock absorber 1 via an insulator 2.
Are fastened to the vehicle body panel 5.

A spring seat 6 is provided on the lower surface of the shell 3.
The coil spring 7 is mounted between the spring seat 6 and the spring seat fixed to the cylinder (not shown). A semi-circular annular groove 8 is formed in the spring seat 6, and a spring seat rubber 9 having a semi-circular cross section is accommodated in the annular groove 8. The spring seat rubber 9 receives the upper end of the coil spring 7 to prevent high frequency vibration, That is, the vibration is prevented from being transmitted from the coil spring 7 directly to the vehicle body panel 5 side by the vibration-proof action of the spring seat rubber 9.

Here, as shown in FIG. 6, the bottom of the spring seat rubber 9 extends laterally all around the top,
Recesses 12 that form lip portions 10 and 11 that project inward from each other are provided on both sides, and are accommodated in the annular groove 8 and between the annular groove 8 and the annular spring 8 under the action of the coil spring 7 force and the vehicle body static load. As shown in FIG. 5, a void 13 is formed. Therefore, the spring sheet rubber 9 undergoes shear deformation between the lip portions 10 and 11 until the void portion 13 is crushed by the vibration input, so that the spring constant is small and the rigidity of the spring sheet rubber 9 is low, so that the vibration damping effect is increased. (This structure is actually 61-1
No. 4886).

[0006]

However, in the above-mentioned conventional spring seat rubber 9, as shown in FIG. 6, the opening 1 of the recess 12 of the spring seat rubber 9 is formed.
Since 2A is narrower than the inside, there is a problem that it is difficult to remove the mold after molding.

Therefore, the present invention provides a spring seat rubber which can be easily removed from the mold and has a small spring constant.

[0008]

A spring seat rubber having a substantially semicircular cross section which is housed in a semicircular annular groove of a spring seat above a strut suspension and receives an upper end portion of a coil spring. The spring is closely contacted with the annular groove. A pair of lip portions, which are guided inward by the spring seat and curved inwardly to form a void portion, are formed upright in the vertical direction over the entire top portion of the seat rubber, and a plurality of cutout portions are provided in each lip.

[0009]

In the manufacturing process, the pair of lip portions are vertically formed so that the die forming the lip portions can be smoothly removed. When mounted on the coil spring, the lips are set so that they are guided while curving so that they point inward, so the reaction force that the lips return to acts in the direction that cancels the vibration input. And reduce the spring constant.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings by attaching the same reference numerals to the same parts as those in the conventional structure.

FIG. 1 shows the structure of the upper part of the strut suspension. At the upper end of the piston rod 1A of the shock absorber 1, a shell 3 is fastened and fixed by a nut 4 via an insulator 2, and the shell 3 is fixed. A spring seat 6 is fixed to the point where it is fastened to the vehicle body panel 5 and to the lower side surface of the shell 3, and a coil spring 7 is mounted between this spring seat 6 and a spring seat fixed to a cylinder (not shown). The basic structure such as the points described above is the same as that of the conventional strut suspension.

Here, a semicircular annular groove 8 is formed in the spring seat 6, and a spring seat rubber 14 having a substantially semicircular cross section is accommodated in the annular groove 8 between the upper end of the coil spring 7. Is installed in the.

As shown in FIGS. 2 and 3, the spring seat rubber 14 has a pair of (inner peripheral side and outer peripheral side) lip portions 15 and 16 formed vertically upright on the entire circumference of the top portion. A receiving groove 14A for the coil spring 7 is formed in the. The lip portions 15 and 16 are guided by the spring seat 6 and are curved inward with each other , and as shown in FIG.
As shown in FIG. 3, notches 17 and 18 are provided in each of the lip portions 15 and 16 at every four cylinder locations every 90 °.

Spring seat rubber 14 of the above embodiment
According to this, when vibration is input from the coil spring 7, the spring constant is small until the void 13 is crushed against this vibration input, and the rigidity of the spring seat rubber 14 is low, so that the vibration damping effect is large. . When the void portion 13 is crushed, the lip portions 15 and 16 and the spring seat rubber 14 as a whole are compressed and deformed to exert a vibration damping effect.

At this time, since the respective tip portions of the lip portions 15 and 16 mounted on the spring seat 6 are in contact with each other, the shape retention of the void portion 13 is high and stable vibration damping characteristics can be obtained. At the same time, there is an advantage that the portion where the tips of the lip portions 15 and 16 are in contact with each other functions as a stopper that receives the bottom wall 13A of the void portion 13 when a large input is applied.

Further, since each of the lip portions 15 and 16 is configured to bend in a state of being housed in the spring seat 6, the force for the lip portions 15 and 16 to return to the spring seat rubber 14 is directed downward. It acts as a reaction force, which acts as a force for canceling the upwardly acting input, and thus can reduce the spring constant.

Further, since the spring seat rubber 14 is constructed so as to be curved while being housed in the spring seat 6, the lip portions 15 and 16 are curved inward at the time of molding, unlike the conventional die-cutting. At this time, the die is not caught and the die cutting work becomes easy.

Further, the notch 1 is formed in each of the lip portions 15 and 16.
7 and 18 are formed, the change in the circumferential length of the lip portions 15 and 16 when the lip portions 15 and 16 are bent by being guided by the spring seat 6 is absorbed, and the spring seat rubber 14 and the spring seat 6 are absorbed. Can be installed smoothly.

The present invention is not limited to the above embodiment, but as shown in FIG. 4, the lip portion 1 having a tapered shape.
It is also possible to make them 9 and 20 so as to make it easier to perform the die cutting of the respective lip portions 19 and 20.

[0020]

As described above, according to the present invention, since the pair of lip portions are formed so as to rise in the vertical direction, the lip portions are curved inward with each other during molding. Moreover, there is an effect that the die does not get caught during the die removing and the die removing work can be performed smoothly.

Further, since the lip portion which is formed so as to rise in the vertical direction is guided and attached to the spring seat, the force that the lip portion tries to return acts on the spring seat rubber as a downward reaction force. , This acts as a force that offsets the upward acting input. Therefore, the spring constant can be further reduced and the vibration damping effect can be further enhanced.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view of an embodiment of the present invention.

FIG. 4 is a sectional view of another embodiment corresponding to FIG.

5 is a sectional view corresponding to FIG. 1 of the prior art.

FIG. 6 is a sectional view corresponding to FIG. 2 of the related art.

[Explanation of symbols]

 6 ... Spring seat 7 ... Coil spring 8 ... Annular groove 13 ... Void portion 14 ... Spring seat rubber 15, 16 ... Lip portion 17, 18 ... Notch portion

Claims (1)

(57) [Claims] 1. A spring seat rubber having a substantially semi-circular cross section which is housed in a semi-circular annular groove of a spring seat above a strut suspension and receives an upper end of a coil spring. A top portion of the spring seat rubber closely contacting the annular groove. the entire circumference, a pair of lip portions forming the gap portion curved inwardly to each other is guided by the spring seat is raised formed standing vertically, and a plurality of cutout portions are provided in each lip Spring seat rubber.