JPS6332995Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an improved strut insulator that contributes to improved ride comfort and reduces lateral eccentricity during steering to enable safe steering. be.

FIG. 1 shows a conventional strut type suspension system used in automobiles. In the figure, 1 is a strut insulator made of an elastic material, 2 is a spring seat upper, 3 is a piston rod, 4 is a holder, 5 is a coil spring, and 6 is a bearing. The strut type suspension device constructed in this manner has its upper end attached to the frame 7, and its lower end attached to the axle (not shown). The ring-shaped strut insulator 1 has the effect of alleviating vibration, and is also connected to the piston rod 3 via a bearing 6 etc.
supports the fulcrum 3a. This strut insulator 1 is required to have a large displacement with respect to the load, that is, a small spring constant, from the perspective of alleviating vertical vibration to improve ride comfort and reduce road noise. On the other hand, from the viewpoint of reducing lateral eccentricity of the fulcrum 3a during steering, it is required that the amount of displacement with respect to the load (acting force) be small, that is, the spring constant be large. In the end, the strut insulator 1 is required to have contradictory attributes. However, in the conventional technology, if the spring constant is made smaller to improve ride comfort and reduce road noise, the eccentricity of the fulcrum 3a increases, and conversely, if the spring constant is made larger to reduce the eccentricity of the fulcrum 3a. There was a problem with the ride being uncomfortable.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a strut insulator that improves riding comfort and reduces eccentricity of the fulcrum. The structure of the present invention that achieves this purpose consists of a ring-shaped elastic material that is incorporated between the upper end of the strut of a strut type suspension system and the vehicle body, and receives a compressive load during the compression stroke of the suspension system to alleviate vibrations. The insulator is a strut insulator, and has a shape and elasticity such that the amount of displacement is approximately directly proportional to the load, and the insulator is designed to exhibit load-displacement characteristics peculiar to the shape of a disc spring against vertical loads. The insulator and the insert rubber have a higher hardness and are formed in the shape of a disc spring.The insulator and the insert rubber work together to prevent struts when the vehicle is empty or loaded with a certain number of people or cargo. Insert rubber is embedded in the insulator and integrally formed so that the amount of displacement in the vertical direction of the entire insulator becomes large and the elasticity in the horizontal direction becomes harder than the elasticity in the vertical direction. It is characterized by

Embodiments of the present invention will be described in detail below with reference to the drawings. Note that parts that are the same as those in the prior art are given the same numbers and redundant explanations will be omitted.

FIG. 2 shows an embodiment of the invention. As shown in the figure, the strut insulator 8 of this embodiment is
Insulator 8a made of ring-shaped elastic material
and an insert rubber 8b made of an elastic material in the shape of a disc spring are integrally formed. The spring characteristics of this insulator 8 in the vertical direction are determined by the third
As shown by the solid line in the figure, when a load W ₀ is applied to an empty vehicle or a predetermined number of people or luggage is on board, the amount of displacement increases, that is, the spring constant decreases. This is because the spring characteristic of the insulator 8a is that the displacement is proportional to the load, as shown by the two-dot chain line in FIG. 3, whereas the spring characteristic of the insert rubber 8b is that its shape is like a disc spring. Therefore, as long as the load is small, the amount of displacement increases as the load increases, but as the load approaches the aforementioned W ₀ , the amount of displacement decreases as the load increases;
This is because when W becomes considerably larger than ₀ , the amount of displacement increases as the load increases. In other words, the insulator 8a whose spring constant is constant regardless of increases or decreases in load, and the insert rubber 8b whose spring constant changes depending on increases or decreases in load, but whose spring constant becomes lower when the load reaches _W0 , are integrated. Since the strut insulator 8 is formed in combination with the above, the spring constant becomes small when the load is _W0 . In this way, riding comfort can be improved and road noise can be reduced. Further, since the insert rubber 8b is shaped like a disc spring, the rigidity of the strut insulator 8 in the lateral direction (direction perpendicular to the axis of the piston rod 3) is improved, and eccentricity of the fulcrum 3a is reduced. Therefore, steering can be performed safely.

As specifically explained above in conjunction with the embodiments, according to the present invention, riding comfort can be improved and road noise can be reduced, and steering can be performed safely and smoothly.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional strut type suspension system, Fig. 2 is a cross-sectional view showing an embodiment of the present invention, and Fig. 3 is a characteristic diagram showing the spring characteristics of the strut insulator according to the present embodiment. It is. In the drawing, 8 is a strut insulator, 8a
is an insulator, and 8b is an insert rubber.

Claims (1)

[Scope of utility model registration request] A strut insulator is a strut insulator made of a ring-shaped elastic material that is installed between the upper end of the strut of a strut-type suspension system and the vehicle body and absorbs a compressive load during the compression stroke of the suspension system to alleviate vibrations. The insulator has a shape and elasticity such that the amount of displacement is approximately directly proportional to The insulator and insert rubber work together to prevent the entire strut insulator from moving in the vertical direction when a load is applied due to an empty vehicle or a predetermined number of people or cargo on board. A strut insulator characterized in that an insert rubber is embedded and integrally formed within the insulator so that the amount of displacement increases and the elasticity in the horizontal direction becomes harder than the elasticity in the vertical direction.