JPS5826810Y2 - Strut suspension system for vehicles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a strut-type suspension system for a vehicle, and particularly to a MacPherson-type suspension system equipped with a pigtail-shaped coil spring.

In a MacPherson type suspension system that generally uses a shock absorber strut, a coil spring is disposed between a shock absorber and a suspension support on the vehicle body side.

As this spring, what is often used is a so-called pigtail-shaped coil spring in which the coil diameter at the lower end of the spring is gradually reduced.

The purpose of this is to make the spring seat on the shock absorber strut side that supports the spring smaller by making the end of the coil spring smaller in diameter.

However, in this case, the spring seat is usually large enough to support only the end of the coil having the smallest diameter.

Therefore, if the coil spring breaks during use, the coil spring cannot be supported by the spring seat, and the upper part of the spring, where the coil diameter is approximately constant, passes through the outside of the spring seat and falls off, causing secondary damage. There was a drawback that caused

In order to compensate for this drawback, it is possible to expand the diameter of the spring seat body so that it can support the spring part whose coil diameter is approximately constant, but in such a case, the pigtail of the spring seat is reduced. The advantage of shaped springs is lost.

Therefore, the present invention has been devised to provide a pine fur vehicle for vehicles that is equipped with a simple spring support mechanism that can reasonably prevent the spring from falling off in the event of breakage, without sacrificing the advantage of miniaturizing the spring seat when using a pigtail-shaped coil spring. The purpose of the present invention is to provide a Son-type suspension system.

The present invention will be explained below with reference to the accompanying drawings.

Figure 1 shows the supporting state of a conventionally used pink tail coil spring, and Figure 2 shows -flJ, which is a measure to prevent springs from falling off when they break. In both figures, 2 is the small diameter spring that supports spring 1. It is a sheet.

As can be seen from Figure 1, it is easy to understand that if the spring breaks midway, the small-diameter spring seat 2 will not be able to support the portion of the spring where the coil diameter is approximately constant, and the spring 1 will fall and detach. .

In the example shown in Fig. 2 as an example of this countermeasure, an expanding flange is provided on the periphery of the support portion at the end of the coil spring to support the portion of the coil spring where the coil diameter is approximately the same. It will reach you, but the meaning of making it into a pigtail will be lost.

FIG. 3 is a front view of the configuration of a vehicle suspension system equipped with a spring seat according to the present invention, FIG. 4 is an enlarged plan view of the lower spring seat 2 of FIG. 3 and its vicinity, and FIG. FIG. 4 is a sectional view taken along line A-A in FIG. 4;

The McPherson type front suspension system shown in FIG. 3 has a front suspension support 5 attached to the vehicle body at its upper end, and a shock absorber strut 3 supported by a lower arm 1 via a ball joint at its lower end. A wheel having a tire 6 mounted thereon is assembled via a knuckle arm and an axle fixed to the lower end of the absorber.

A normal type upper spring seat 4 is provided above the shock absorber strut, while a lower spring seat 2 is fixed to the middle part of the strut, and a coil spring 1 is disposed between them.

Next, the structure of the lower spring seat 2 according to the present invention will be explained in detail with reference to FIGS. 4 and 5.

The shape of the portion of the lower spring seat 2 that receives the coil spring 1 is a spiral surface that starts from the terminal end support portion 8 that receives the terminal end A of the coil spring 1 and follows the coil pitch of the coil spring 1.

A plurality of (three in this embodiment) radial flange portions 14, 12, and 13 are provided on the upper outer periphery.

The outer circumferential edge of the radial collar portions 14, 12, 13 has an arc shape centered on the center of the coil spring 1, and its radius is approximately the coil outer diameter of the constant part of the coil diameter of the coil spring 1 (= coil outer diameter) It has a value larger than half of the diameter (10 coil wire diameter).

The lower end attachment portion 15 is fixed to the strut 3 by an appropriate method such as welding.

Therefore, the lower surface of the spring 1 gradually rises while abutting along the spring bearing surface L9t10c of the spring seat 2, gradually increasing its diameter and finally reaching a portion (portion B) where the coil diameter is approximately constant.

After this, the portion of the spring 1 whose coil diameter is approximately constant passes over the portions 12, 13, and 14.

In addition, in the lower spring seat 2, the bearing surface 8.9,
10 and the collar portions 12, 13, and 14 are the lower end attachment portions 15.
Its height from the end of the lower spring seat 2 is gradually reduced in a counterclockwise direction when viewed from above the lower spring seat 2.

For example, in the brim portion 14, line C, line D, and line E shown in FIG.
The height of the lower end attachment part 15 from the end becomes gradually lower.

In other words, the brim portion 14 forms an inclined surface downward from the C line.

Although this embodiment has been described with three collar parts 12, 13, and 14, the number can be selected arbitrarily.

Further, the lower spring seat according to the present invention can be manufactured by pressing or casting a thin metal plate, or by using other non-metallic materials as long as the strength requirements can be met.

Since the present invention is constructed as described above, even if the coil spring breaks at any part, the remaining spring part is supported by any of the collar parts 12, 13, and 14 to prevent it from falling off, thereby preventing the coil spring from breaking. At the same time, it is possible to provide a lean and compact spring seat as a pigtail-shaped coil spring supporting component while protecting the accompanying secondary damage.

[Brief explanation of the drawing]

Figure 1 shows a conventional pigtail spring seat. Fig. 2 is an example of a spring seat to prevent breakage and falling off, Fig. 3 is a block diagram of a McPherson suspension system equipped with a spring seat according to the present invention, and Fig. 4 is an enlarged detailed view of an embodiment of the spring seat according to the present invention. , Figure 5 is A of Figure 4.
-A sectional view. 1... Coil fling, 2... Lower fling seat 3... Mountain shock absorber strut 4... Atsupa splinter seat, 5.°
...Upper suspension support, 6...
·tire,? ...Lower arm, 8, 9, 10.
...Spring bearing surface, 11.12, 13, 14
...Brim part, 15...Spring seat mounting part.

Claims (1)

[Claims for Utility Model Registration] In a strut-type suspension system for a vehicle equipped with a coil spring that is continuous to the lower end of a main part with a substantially constant coil diameter and has an end part whose coil diameter gradually decreases from the main part. , a helical spring support part that comes into contact with the lower surface of the coil spring at the end, and a plurality of tail parts that protrude radially from the upper outer peripheral end of the spring support part and can support the coil spring of the main part. A strut type suspension system for a vehicle, characterized by having a lower spring seat.