JPS5918884Y2 - 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.

In a strut type suspension, the upper part of the strut is attached to the vehicle body member via a mounting rubber, but generally, rubber is glued between the inner cylinder and outer cylinder to fix the inner cylinder to the upper part of the strut, and the outer cylinder is attached to the car body member. Usually, the mounting structure is fixed to the side, and the axial load of the strut caused by the vertical vibration of the wheel is absorbed by elastic deformation of the rubber in the shear direction (for example, Japanese Patent Publication No. 51-2149).
(See Publication No. 4).

However, non-adhesive types have come to be used to reduce costs by omitting the process of gluing rubber to the inner and outer cylinders, and the conventional non-adhesive type mount structure is generally As shown in the figure.

That is, in FIG. 1, 1 is a strut, 2 is a 1-ring-shaped mount rubber, and the mount rubber 2 is fitted with its inner peripheral surface 21 into a cylindrical plate 11 attached to the upper part of the strut 1. The lower end surface 22 of the mount rubber 2 is applied to the plate 12 fixed to the strut 1 at the lower part of the cylindrical plate 11, and the outer peripheral surface 23 of the mount rubber 2 is a tapered surface formed on the vehicle body member 3 that widens at the lower side. The mount rubber 2 is fitted onto the cylindrical wall surface 31, and is assembled with the upper end surface 24 of the mount rubber 2 in contact with the flange portion 32 formed at the upper end of the wall surface 31.

Such a conventional non-adhesive type has a mount rubber 2 whose inner and outer peripheral surfaces are connected to a cylindrical plate 11 and a cylindrical wall surface 3.
Since the structure is such that the strut 1 is simply fitted onto the mount rubber 2 and its upper and lower end surfaces are brought into contact with the flange portion 32 and the plate 12, the vertical load applied to the strut 1 is mostly due to the vertical load of the mount rubber 2. It will be absorbed by elastic deformation in the compression direction.

However, when the vertical vibration from the wheels is small, it is desirable for the mount part of a suspension device to have a spring constant as low as possible in order to improve riding comfort and reduce road noise. In other words, in the conventional non-adhesive type mount structure, which receives most of the vertical load of the strut 1 through elastic deformation in the compressive direction of the mount rubber 2, the spring constant is relatively high, resulting in poor riding comfort.
Unfavorable in terms of road noise etc.

The present invention is aimed at solving the above-mentioned conventional problems in the non-adhesive mount type, and will be described below with reference to the embodiment shown in FIG.

In the present invention, as shown in FIG. a and the plate 12 to sandwich and grasp the inner parts of the upper and lower end surfaces 24 and 22 of the mount rubber 2,
On the other hand, a flange portion 32 formed at the upper end of the cylindrical wall surface 31 of the vehicle body member 3 is provided with a step portion 32 a that projects downward, so that a portion 24 a of the upper end surface 24 of the mount rubber 2 is closer to the outer periphery.
is configured to be held between the step portion 32a and the cylindrical wall surface 31, and a gap A of a predetermined size is provided between the portion 22a of the lower end surface 22 of the mount rubber 2 near the outer periphery and the plate 12.

By adopting the above-mentioned configuration of the present invention, the mount rubber 2 absorbs the vertical vibration of the strut 1 by elastic deformation in the shear direction between the inner and outer circumferential surfaces within the range of the gap A. Therefore, the spring constant is lower, similar to the mount rubber adhesive type in which the inner and outer peripheral surfaces of the mount rubber are adhered to the strut side and the vehicle body member side, respectively.
Riding comfort can be improved and road noise etc. can be reduced.

Also, if the vertical stroke of the wheels is large, such as when driving on rough roads,
When the gap A becomes zero, the portion 22a of the lower end surface 22 of the mount rubber 2 near the outer periphery hits the plate 12, and the mount rubber 2 absorbs the compression deformation between its upper and lower end surfaces.

The rebound is elastically regulated when an elastic material 4 such as rubber attached to the upper surface of the flange portion 32 of the vehicle body member 3 hits a flange-like strut 13 formed on the upper part of the cylindrical plate 11 on the strut 1 side. This configuration is the same as the conventional one shown in FIG.

In this way, with this invention, when the vertical vibration from the wheels is small, the mount rubber deforms elastically in the shearing direction, so the spring constant is extremely low, improving ride comfort during general driving and reducing road noise etc. In addition, when the vertical stroke of the wheel increases, such as when driving on rough roads, the mount rubber undergoes elastic deformation in the compression direction and the spring constant increases, which can prevent deterioration of steering stability on rough roads. It can bring about a great practical effect in that it can completely eliminate the drawbacks of conventional rubber non-adhesive types.

[Brief explanation of the drawing]

FIG. 1 is a half sectional view showing a conventional mount structure of a mount rubber non-adhesive type, and FIG. 2 is a half sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Strut, 2... Mount rubber, 3... Car body member, 4... Elastic material, 11... Cylindrical plate, 11a...
・Stepped portion, 12...Plate, 13...
Stopper, 21... Inner peripheral surface, 22...
Lower end surface, 23... Outer peripheral surface, 24... Upper end surface, 31... Cylindrical wall surface, 32...
Flange portion, 32a...Stepped portion.

Claims (1)

[Scope of utility model registration request] A cylindrical plate 11 and a plate 12 are attached to the upper end of the strut 1 that elastically supports the wheel, and a stepped portion 11a is formed on the cylindrical plate 11. 31 is fitted into the cylindrical plate 11, and the upper and lower end surfaces of the mount rubber 2 are sandwiched between the stepped portion 11a and the plate 12, and the outer periphery 23 of the mount rubber 2 is fitted. A stepped portion 32 is formed on the flange portion 32 formed on the upper part of the cylindrical wall surface 31 of the vehicle body member 3.
a, and a portion of the upper end surface 24 of the mount rubber 2 near the outer peripheral surface is sandwiched between the cylindrical wall surface 31 and the stepped portion 32a,
The plate 12 is configured to face a portion of the lower end surface 22 of the mount rubber 2 with a predetermined gap below the outer peripheral surface, and a flange-like stopper 13 formed on the upper part of the cylindrical plate 11 and a flange-like stopper 13 on the lower surface thereof. A mount structure for a strut-type suspension, characterized in that an elastic member 4 is interposed between the upper surfaces of the flange portions 32 of the opposing vehicle body members 3 to constitute a rebound stopper mechanism.