JPH11166584A - Link member with dynamic damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate fitting of a dynamic damper to a link member. SOLUTION: A link member is provided with a hollow arm part 1 and connection parts 2 provided at both ends of the arm part 1. An insulator 3 is pressed into each connection part 2. The arm part 1 is of a rectangular pipe shape, and a guide groove 9 is longitudinally formed in the hollow part. A dynamic damper 10 guided by this guide groove 9 is pressed in from one end side of the arm part 1 and fixed into the arm part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link member used for an engine mount, a suspension link and the like of a vehicle, which is advantageously provided with a separate dynamic damper or mass.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 63-60257 discloses a link member used for a power unit of a vehicle.
The link member includes a sheet metal arm having a substantially U-shaped cross section,
A ring-shaped connecting portion provided at both ends thereof, an insulator press-fitted into the connecting portion, and a damper elastic body constituting a dynamic damper is baked on the connecting portion or the arm portion.

[0003] In the present application, the insulator is a vibration isolator comprising two attachment portions attached to the vibration source side and the vehicle body side and an elastic body such as rubber for connecting the two attachment portions. It contains a rubber vibration insulator.

[0004]

By the way, if the dynamic damper is provided as in the above-mentioned conventional example, the dynamic damper protrudes outside the connecting portion and the arm portion.
It is necessary to dispose the dynamic damper so as to avoid interference with other parts, and the degree of freedom for laying out the dynamic damper is significantly restricted.

Further, when the resonance frequency of the link member changes due to a change in the design of the vehicle body structure or the link mechanism, etc., the dynamic damper is attached to the link member by printing, even if the resonance frequency of the dynamic damper is to be changed in response to the change. Therefore, only the dynamic damper cannot be converted, and tuning becomes difficult.

Therefore, an object of the present invention is to provide a link member with a dynamic damper which has a high degree of freedom in layout and is easy to tune.

[0007]

According to a first aspect of the present invention, there is provided a link member having a dynamic damper according to the present invention, comprising an arm portion and connecting portions provided at both ends of the arm portion. In a link member that connects the connecting portions at both ends to the vibration source side and the vehicle body side via insulators attached to the portion, an arm portion is formed by a pipe member, and a separate dynamic damper or The mass body is inserted and fixed.

[0008] In a second aspect based on the first aspect,
A guide portion of the dynamic damper or its mass body is formed in the hollow portion, and the dynamic damper or its mass body is press-fitted and fixed along the guide portion into the arm portion.

[0009] In a third aspect based on the first aspect,
The dynamic damper or the mass body inserted into the hollow portion is fixed to the wall of the arm portion by fastening.

[0010]

According to the first aspect of the present invention, the arm portion is formed of a pipe member, and a separate dynamic damper or a mass body thereof is inserted and fixed in the hollow portion of the arm member. Is built in without going outside the link member. Therefore, there is no need to consider interference with other components, and the degree of freedom in laying out the dynamic damper is significantly increased.

Moreover, by inserting and fixing the dynamic damper into the arm member, it is not necessary to use a large mold for providing the dynamic damper as in the prior art. The fall of the dynamic damper can be reliably prevented.

In addition, the appearance of the link member is improved because the dynamic damper is not seen. Further, tuning can be easily performed by replacing the dynamic damper or its mass body inserted into the hollow portion.

According to the second aspect, if the dynamic damper or its mass is press-fitted from one open end of the arm, the dynamic damper or its mass follows the guide formed in the hollow of the arm. Since it is fixed in place smoothly, manufacturing is easy and accurate.

According to the third aspect, after inserting the dynamic damper or its mass body into the hollow portion of the arm portion,
If the dynamic damper or its mass is fastened to the wall of the arm, the dynamic damper or its mass can be easily fixed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a link member used for a vehicle suspension will be described below with reference to the drawings. FIG. 1 is a partially cutaway view of a link member according to a first embodiment, and FIG. 2 is a sectional view taken along line 2-2 of FIG.

The link member includes a hollow pipe-shaped arm portion 1 and ring-shaped connection portions 2 formed at both ends thereof, and an insulator 3 is press-fitted to each connection portion 2.

The insulator 3 is a known member that interrupts the transmission of vibration by absorbing the vibration. In this embodiment, the insulator 3 is made up of concentrically or eccentrically arranged outer cylinder 4 and inner cylinder 5 and rubber or the like connecting between them. This is a cylindrical anti-vibration bush composed of an elastic member 6.

Each connecting portion 2 is welded to both ends of the arm portion 1 by mounting projections 7 formed on the outer peripheral portion so as to protrude outward. Are connected to a vibration source side, for example, a power unit including an engine and a transmission and a wheel side, and the other is rotatably mounted to a vehicle body side.

The mating side of each connecting portion 2 is a fixed end or a free end of a member constituting an appropriate link mechanism such as a suspension, and each connecting portion 2 is centered on the connecting member 8 with respect to the mating side. And it is relatively rotatable.

The arm portion 1 has a square pipe shape, and a guide groove 9 is integrally formed in an inner wall surface facing the hollow portion in a longitudinal direction, and a dynamic damper 10 guided by the guide groove 9 is formed in the hollow portion. Is press-fitted and fixed.

The dynamic damper 10 is initially formed separately from the link member, and is composed of a pair of mounting plates 11, a mass body 12 disposed therebetween, and a damper elastic body 13 connecting between them. The structure of.

The vibration damping action of the dynamic damper 10 is based on the correlation between the spring constant K of the damper elastic body 13 and the total mass M of the mass body 12 and the mounting plate 11. Tuned to frequency.

FIG. 3 shows a method of press-fitting and fixing the dynamic damper 10. The dynamic damper 10 is attached to the arm 1 before the connecting portion 2 is welded from one end open side. 1, the mounting plate 11 is fitted into the guide groove 9, and is pressed into a predetermined position using the pressing machine 14.

Then, the dynamic damper 10 is guided by the guide groove 9 and is pushed into a predetermined position, where it is press-fitted and fixed. The provision of the guide grooves 9 facilitates the press-fitting of the dynamic damper 10 and enables accurate positioning of the fixed position.

The position of the dynamic damper 10 can be fixed by press-fitting, but each connecting part 2 is fixed so as not to affect the heat when the connecting part 2 is welded to both ends of the arm 1.
A position sufficiently distant from the arm portion 1 is selected, and in this embodiment, the arm portion 1 is located at a substantially middle position in the length direction.

The arm portion 1 and the connecting portion 2 are each made of an aluminum alloy, and the arm portion 1 is formed in a sectional shape shown in FIG. 2 in which a guide groove 9 is integrally formed by extrusion molding. Further, the cross-sectional shape of the arm portion 1 may be a round pipe shape instead of a square pipe shape.

Further, each of the arm portion 1 and the connecting portion 2 can be formed of a casting such as iron or resin.
When both are made of resin, they are integrated by bonding.

Next, the operation of this embodiment will be described. In this embodiment, the arm 1 has a hollow structure, and the dynamic damper 10 is inserted and fixed in the hollow. Therefore, the dynamic damper 10 is built in without being outside the link member.
Therefore, there is no need to consider interference with other components, and the degree of freedom in laying out the dynamic damper is significantly increased.

In addition, by inserting and fixing the dynamic damper 10 into the arm 1 material, molding using a large mold for providing the dynamic damper as in the related art can be made unnecessary, so that the manufacturing becomes easy. It is possible to reliably prevent the dynamic damper from falling off after the mounting.

In addition, since the dynamic damper 10 is not seen, the appearance of the link member is improved. Further, if the dynamic damper 10 inserted into the hollow portion is replaced, tuning can be easily performed.

Further, when the dynamic damper 10 is press-fitted from one open end side of the arm portion 1, the dynamic damper 10 is inserted into the guide groove 9 formed in the hollow portion of the arm portion 1.
, The product is smoothly and securely fixed in a predetermined position, so that the production becomes easy and accurate.

FIGS. 4 and 5 relate to the second embodiment, in which only the mounting structure of the dynamic damper and the arm is changed. FIG. 4 corresponds to FIG. 1, and FIG.
(A sectional view taken along line 5-5 in FIG. 4). Note that the same reference numerals are used for parts common to the previous embodiment.

In this embodiment, the mounting plate 11 extends in the length direction of the arm 1 longer than in the previous embodiment, and a weld nut 20 is provided in advance in this extension.

On the other hand, a through hole 21 is provided in advance on the wall surface of the arm portion 1 at a position where the dynamic damper 10 is fixed. When it is necessary to adjust the mounting position of the dynamic damper 10, a plurality of through holes 21 can be formed in the length direction of the arm 1 as shown in FIG.

The dynamic damper 1 is inserted into the arm 1.
0 is inserted, the weld nut 20 of the mounting plate 11 is aligned with the through hole 21 of the arm 1, and a bolt 22 is inserted from the outside of the through hole 21 and fastened to the weld nut 20. It is easily fixed inside.

According to this fixing structure, there is no need to press-fit the dynamic damper 10, so that the press-fitting device can be omitted. In addition, the guide groove 9 can be omitted, and the arm 1 having a simpler shape can be used. However, if the guide groove 9 is formed, positioning becomes easy.

Moreover, since the dynamic damper 10 is inserted into the hollow portion of the arm 1 and then the wall of the arm 1 and the mounting plate 11 of the dynamic damper 10 are fastened, the dynamic damper 10 can be easily fixed.

The present invention is not limited to the above embodiments, but can be variously modified. For example, only the mass body 12 can be inserted into the arm 1 instead of the dynamic damper 10. In this case, the function of the elastic body of the dynamic damper can be shared by the elastic member 6 of the insulator 3.

Further, the present invention can be applied not only to the suspension, but also to a link member used for mounting a power unit including an engine and a transmission, a link member of a shift mechanism, and the like. As an example of the link member in the shift mechanism, there is a support link connecting a change lever floatingly supported on the vehicle body and a control link having one end connected to the transmission.

[Brief description of the drawings]

FIG. 1 is a diagram showing a link member according to a first embodiment with a part cut away.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a view showing a press-fit direction of a dynamic damper.

FIG. 4 is a view corresponding to FIG. 1 according to a second embodiment.

FIG. 5 is a diagram corresponding to FIG. 2;

[Explanation of symbols]

1: arm part, 2: connecting part, 3: insulator, 9:
Guide grooves, 10: dynamic damper, 11: mounting plate, 12: mass body, 13: damper elastic body, 20: weld nut, 21: through hole, 22: bolt

Claims (3)

[Claims] A link member comprising an arm portion and connecting portions provided at both ends thereof, and connecting the connecting portions at both ends to a vibration source side and a vehicle body side via insulators attached to at least one of the connecting portions. 3. A link member having a dynamic damper, wherein the arm portion is formed of a pipe member, and a separate dynamic damper or a mass body thereof is inserted and fixed into a hollow portion of the arm portion. 2. The dynamic damper or its mass body guide portion is formed in the hollow portion, and the dynamic damper or its mass body is press-fitted and fixed into the arm portion along the guide portion. A link member having a dynamic damper. 3. A link member having a dynamic damper according to claim 1, wherein the dynamic damper or its mass body inserted into the hollow portion is fixed to the wall of the arm portion by fastening.