JPS5826169Y2 - Mount structure of strut type suspension - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mount structure for a strut type suspension used in automobiles and the like.

Strut type suspensions are often used as wheel suspension devices in automobiles and the like.

In the strut type suspension, as shown in FIG. 1, the lower part of the strut 1 is connected to the upper part of the housing 7 that supports the wheel 6, and the upper part of the rod part of the strut 1 is connected to the vehicle body 9 via the mount rubber 8. A coil spring 3 is interposed between spring seats 4 and 5 provided on the rod portion 2, and the tip of a lower arm 10 whose base end is rotatably supported toward the vehicle body is a ball joint at the bottom of the housing 7. Usually, they are connected via 11.

12 is a drive shaft, and 13 is a bearing.

When the vertical vibration from the wheels 6 is small, the mounting part (mount rubber part 8) on the vehicle body of such a strut type suspension has a spring constant as low as possible to improve riding comfort and reduce road noise. Although desirable,
When the vertical stroke of the wheel is large, such as when driving on a rough road, if the spring constant is set low, the steering stability deteriorates, so in this case, it is preferable to have a high spring constant.

The present invention provides a mount structure that can satisfy the above-mentioned conditions, and the embodiment shown in FIG. 2 will be described below.

In FIG. 2, the mount rubber 8 is formed into an annular shape, and an inner cylinder 8a fixed to the inner peripheral surface of the mount rubber 8 is connected to the tip of the rod part 2 and fixed to the outer peripheral surface of the mount rubber 8. The outer cylinder 8b is fixed to the car body 9 with bolts, nuts, etc., and the vertical vibration from the upper part of the rod part is absorbed by the elastic deformation of the annular mount rubber 8 in the shearing direction, thereby mitigating the transmission of vibration to the car body 9 side. Generally, it looks like this.

In the present invention, for example, a cylindrical stopper plate 14 is integrally provided within the mount rubber 8 so as to be substantially concentric with the mount rubber 8, and stopper portions 8c and 8d, in which the upper and lower edges of the stopper plate 14 face each other, are attached to the outer cylinder 8b. The configuration is as follows.

The illustrated embodiment shows an example in which the stopper plate 14 is provided in multiple stages (two stages), and in this case, the inner The distance between the upper and lower edges of the stopper plate 142 and the stopper parts sc and 8d is set to be a dog.

In the above configuration, if the vertical vibration load applied to the rod part 2 of the strut is small, the stopper plate N41.1
Since the upper and lower edges of 4□ do not come into contact with the stopper parts 8c and 8d, the mount rubber 8 is connected to the inner cylinder 8a and the outer cylinder 8.
Since it is elastically deformed in the shearing direction within the width A between b, its spring constant is extremely low, and the riding comfort during general driving is good and road noise etc. are significantly reduced.

When the vertical vibration load applied to the rod part 2 increases a little,
The upper and lower edges of the outer stopper plate 14□ abut against the stopper portion 8c or 8d.

Then, as shown in FIG. 3, the mount rubber 8 essentially has a width B between the inner cylinder 8a and the outer stopper plate 14
The elastic deformation occurs in the range A, and the spring constant becomes considerably higher than that in the case where the elastic deformation occurs in the range A.

When the vibration stroke further increases, the upper and lower edges of the inner stopper plate 14□ also come into contact with the stopper part 8c or 8d, and in that case, the mount rubber 8 is elastically deformed in the width of the inner cylinder 8a and the inner stopper plate 14□. The spring constant is further increased, and it is possible to prevent deterioration of steering stability when driving on rough roads.

In this way, according to the present invention, with an extremely simple configuration, the spring constant of the mount rubber 8 can be made to have non-linear characteristics such that it is low when the vibration is small and becomes high when the vibration is large. The mount rubber 8 can simultaneously satisfy all demands such as safety, ride comfort, road noise countermeasures, etc.
Due to the interposition of the stopper plate 14, the spring constant of the deformation in the compressive direction is significantly increased, and running stability can be improved, which can bring about a great practical effect.

Although the illustrated embodiment shows an example in which the stopper plate 14 is provided in two stages, it may be provided in one stage, or in some cases, it may be provided in three stages.

Furthermore, in the above description, an example in which the stopper plate 14 is cylindrical is described, but the stopper plate 1
4 is not limited to a cylindrical shape, and may be a simple plate discontinuously embedded in the mount rubber 8.

[Brief explanation of drawings]

Fig. 1 is a front view showing a strut type suspension structure to which the present invention is applied, Fig. 2 is a sectional view of main parts showing an embodiment of the present invention, and Fig. 3 is a main part showing the operating state of the device shown in Fig. 2. FIG. 1...Strut, 2...Rod part,
3...Coil spring, 6...Wheel,
7...Housing, 8...Mount rubber, 8a...Inner cylinder, 8b...Outer cylinder,
8c, 8d...stopper part, 9...vehicle body, 14...stopper plate.

Claims (3)

[Scope of utility model registration request] (1) In a strut-type suspension in which the lower part of the strut is connected to the housing that supports the wheel, and the upper part of the rod of the strut is connected to the vehicle body via a mount rubber, the inner cylinder and the vehicle body are connected to the mount rubber on the rond side. A strut-type suspension characterized in that a stopper plate is integrally provided between an outer cylinder serving as a connecting part to the side, and stopper parts facing the upper and lower edges of the stopper plate at a predetermined interval are provided on the vehicle body side. Mount structure. (2) A plurality of stopper plates are provided in a nearly concentric manner within the mount rubber, and the gap between the upper and lower edges of the outer stopper plate and the upper and lower stopper parts is the same as the gap between the upper and lower edges of the inner stopper plate and the upper and lower stopper parts. 2. The strut-type suspension mount structure according to claim 1, wherein the strut-type suspension mount structure is configured such that the gap between the strut and the strut-type suspension gradually increases. (3) The strut-type suspension mount structure according to claim 1 or 2, wherein the stopper plate has a substantially cylindrical shape.