JPS6143214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspension system including a suspension member on which a power unit is mounted and a stabilizer.

Previously used as a front suspension in 1982.
-73411, as shown in Figure 1, this suspension system 1 has a suspension member 2 attached to a vehicle body frame (not shown). A transverse link 3, an upper control arm 4 called an A-shaped arm, and the like are provided at both ends of the suspension member 2. Reference numeral 5 designates a stabilizer whose both ends are attached to the transverse link 3 via rubber bushings 6. Incidentally, a power unit (not shown) is usually mounted on the suspension member 2 via an engine mount. Therefore, vibrations from the power unit are transmitted to the suspension member 2 via the engine mount, and at this time, the suspension member 2 resonates and causes bending vibration, and this bending vibration is transmitted to the vehicle body frame. If the noise is transmitted into the vehicle interior, it becomes a muffled sound and deteriorates the quietness in the vehicle interior.

Therefore, in recent years, as shown in FIG. 2, a weight 7 is attached to the suspension member 2 via an elastic body, and the weight 7 and the elastic body constitute a dynamic damper. The bending vibration of the suspension member is caused by the vibration of a vibration system composed of the weight 7 and an elastic body, that is, by making the bending resonance frequency of the vibration system match the bending vibration frequency of the suspension member. However, in this case, the weight 7 is provided separately, resulting in an increase in the number of parts, resulting in an increase in cost and a significant increase in the weight of the vehicle.

In view of the above conventional problems, the present invention utilizes the functions of a dynamic damper using parts that are generally installed without increasing the number of parts or significantly increasing the weight of the suspension member. In order to achieve this object, the present invention utilizes a stabilizer that has been conventionally provided in a suspension system, and uses this stabilizer to stabilize the suspension member. This suppresses the vibration of the That is, the configuration of the present invention has a suspension member on which the power unit is placed, a stabilizer is supported on this suspension member via an elastic body, and an elastic system consisting of the stabilizer and the elastic body is provided. The bending resonance frequency of the suspension member is made to match the bending resonance frequency of the suspension member itself. Therefore, in the suspension system of the present invention, by providing the generally installed stabilizer with a dynamic damper function in addition to the original stabilizer function, the number of parts and the weight are significantly increased. This has the excellent effect of suppressing bending vibration of the suspension member without any problems.

An embodiment of the present invention will be described in detail below with reference to the drawings. Incidentally, in explaining this embodiment, the same parts as those in the conventional structure will be described with the same reference numerals.

In Figure 3, 2 is a suspension member;
Reference numeral 3 designates a transverse link, and both ends of a stabilizer 5 are attached to both transverse links 3 via bushes 6, and the spring action of the stabilizer 5 in the torsional direction causes the vehicle body to move significantly when the vehicle turns. Prevent it from tipping. In this embodiment, both sides of the central portion of the stabilizer 5 are attached to and supported by the suspension member 2 via stabilizer brackets 10. As shown in FIG. 4, the stabilizer bracket 10 has an elastic body 11 disposed between the outer bracket 10a and the stabilizer 5.
and the stabilizer 5 constitute one vibration system 12. Then, the bending resonance frequency of this vibration system 12 is made to match the bending resonance frequency of the suspension member 2 itself. That is, in order to substantially match the bending resonance frequencies of both, a weight 13 is attached to the stabilizer 5 in this embodiment. Incidentally, when the stabilizer 5 vibrates, it is most effective to attach the weight 13 to the antinode of the amplitude (the part that vibrates the largest); however, when the antinode of the amplitude is not located at the center of the stabilizer 5, As shown in FIG. 5, two weights 13a may be used and these weights 13a may be arranged symmetrically at the antinode portions.

With the above configuration, when the vibration of the power unit (not shown) placed on the suspension member 2 is transmitted and the suspension member 2 resonates and causes bending vibration (approximately 100Hz to 200Hz), this bending vibration is transmitted to the stabilizer. The vibration is transmitted to the stabilizer 5 via the bracket 10, and a vibration system 12 composed of the stabilizer 5 and the elastic body 11 causes bending vibration. At this time, when the bending vibration is transmitted from the suspension member 2 to the vibration system 12, the bending resonance frequency of the suspension member 2 and the bending resonance frequency of the vibration system 12 are matched, so that the mutual phase is 2π. Due to the shift, mutual vibrations are canceled out, so that a so-called dynamic damper function is achieved, and the bending vibration of the suspension member 2 is suppressed. Therefore, vibrations transmitted from the suspension member 2 through the vehicle body frame into the vehicle interior are significantly reduced, and a significant effect is exerted in countering muffled noise.

By the way, in the above-mentioned embodiment, the vibration system 1
In adjusting the bending resonance frequency of 2, the weights 13 and 13a are attached to the stabilizer 5 to change the weight of the stabilizer 5. By changing the spring constant of the body 11, the bending resonance frequency of the vibration system 12 can also be adjusted.

Furthermore, when changing the weight of the stabilizer 5, if the bending resonance frequencies of both the vibration system 12 and the suspension member 2 match by reducing the weight of the stabilizer 5, the stabilizer 5 can be made into a hollow shape. By forming the stabilizer 5 and appropriately setting its inner diameter and outer diameter, the weight of the stabilizer 5 itself can be reduced without reducing the rigidity required for the stabilizer 5 to perform its original function.

Incidentally, the above-mentioned embodiment is an F.F., F.F., which has an engine at the front for the Uitschubon type suspension system 1.
Although the case where the present invention is applied to an F/R type front suspension is shown, the present invention is of course not limited to this and may be applied to an R/R type rear suspension.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional suspension system, FIG. 2 is a perspective view of a main part of another conventional suspension system, FIG. 3 is a perspective view of a main part of a suspension system of the present invention, and FIG. FIG. 3 is a cross-sectional view taken along the line - in FIG. 3, and FIG. 5 is a perspective view of essential parts showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Suspension device, 2... Suspension member, 5... Stabilizer, 10... Stabilizer bracket, 11... Elastic body, 12... Vibration system, 13, 13a... Weight.

Claims (1)

[Claims] 1 has a suspension member on which a power unit is placed, supports a stabilizer on this suspension member via an elastic body, and adjusts the bending resonance frequency of a vibrating body composed of the stabilizer and the elastic body to the suspension member. A suspension device characterized in that the bending resonance frequency of the suspension member is made substantially equal to that of the suspension member.