JP3719204B2 - Link rod - Google Patents

Description

【００４０】
上記のように、本発明の実施例品のモデルは、振動周波数の固有値については、従来品とほぼ同等の値となる。また、ばね定数については、従来品に比して大幅に高くなった。これは、折曲部４にフランジ３を設けて、さらに該フランジ３に外側へ折曲による延出縁３ａを形成したことにより、強度が大幅にアップしたことによるものと考えられる。
【００４１】
なお、図６〜図８に示す第２実施例のリンクロッドについては、その基本的構成、特にフランジ３及び延出縁３ａによる補強作用が同様に発揮されることから、前記実施例品のモデルと同様に、従来品とほぼ同等の振動周波数の固有値が得られ、かつ従来品よりも高いばね定数が得られるのであり、しかもその構造により軽量化もできることになる。
【００４２】
【発明の効果】
上記したように本発明のリンクロッドは、板材からプレス成形されるものあるため、製作加工が容易でコスト安価に提供できるばかりか、板材よりなるものであっても補強用フランジにより充分な強度を保有でき、しかもリンクロッドの板厚やフランジの大きさの変更などにより、強度や質量さらにはばね定数を容易に調整でき、振動周波数の固有値も任意に設定できる。それゆえ、本発明のリンクロッドは、製作容易でかつ強度や質量を容易に調整でき、振動周波数の固有値を任意に設定することができるので、自動車の車体フレームとこれに吊り下げられるメンバとを連結するリンクロッドとして好適に使用することができる。
【図面の簡単な説明】
【図１】本発明に係るリンクロッドの第１実施例の斜視図である。
【図２】同上のリンクロッドの側面図である。
【図３】同上のリンクロッドの正面図である。
【図４】同上のリンクロッドの平面図である。
【図５】図２のＸ１−Ｘ１線の断面図である。
【図６】本発明に係るリンクロッドの第２実施例の側面図である。
【図７】同上のリンクロッドの正面図である。
【図８】同上のリンクロッドの平面図である。
【図９】従来のリンクロッドの斜視図である。
【図１０】同上のリンクロッドの側面図である。
【図１１】同上のリンクロッドの正面図である。
【図１２】前図のＸ２−Ｘ２線の断面図である。
【符号の説明】
（１） リンクロッド
（２） ロッド主部
（３）（３） 補強用フランジ
（３ａ）（３ａ） 延出縁
（４） 折曲部
（１０） 第１取付部
（１１） 取付孔
（１２） 筒状突縁
（２０） 第２の取付部
（２１） 取付孔
（２２） 筒状突縁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a link rod that connects a body frame of an automobile and a member that is suspended by the body frame and is connected to a transverse link .
[0002]
[Prior art and problems to be solved by the invention]
As a structure for supporting a member for receiving and supporting an automobile engine and transmission and related parts, it is known that the front side of the member is connected to a vehicle body frame by a link rod and supported in a suspended state. In this case, one end of the link rod is attached to the vehicle body frame via a rubber bush, and the other end is attached to the member via a rubber bush.
[0003]
Conventionally, as illustrated in FIGS. 9 to 12 , the link rod 101 is made of a metal pipe material, the rod main portion 102 is processed into a flat shape with a substantially elliptical cross section, and both ends are front and back. It is further flattened so as to form a plate of two sheets, one end of which is bent at a substantially right angle to the rod extending direction, and a mounting hole 111 for fitting a bush is formed at the center of the end. The second attachment portion 110 is formed as a first attachment portion 110 having a second end and has a fitting hole 121 for fitting a bush having a shaft center in a direction intersecting with the shaft center of the first attachment portion 110 at an eccentric position. The first attachment portion 110 is attached to one and the other of the body frame and the member, for example, on the vehicle body frame side, and the second attachment portion 120 is attached to the member side. Has been.
[0004]
By the way, when used by attaching to the body frame side and the member side via the rubber bush as described above, for example, the link rod itself causes a resonance action with respect to the vibration of the member, which leads to the vibration and noise of the vehicle. become.
[0005]
Therefore, as the above-mentioned link rod, it is necessary to set a mass, a spring constant, and an eigenvalue of a vibration frequency in order to obtain good vibration isolation characteristics while maintaining a predetermined strength. In the case of link rods made of the above pipe materials, the manufacture and processing are not easy, the cost is high, there is no degree of design freedom, and it is difficult to control changes in mass and spring constant, etc. Is not easy.
[0006]
The present invention has been made in view of the above, and can be easily manufactured as a link rod for connecting a body frame and a member suspended by the body frame , in particular, a member coupled to a transverse link and the body frame. It is an object of the present invention to provide a link rod that can easily adjust strength and mass and can arbitrarily set a natural value of a vibration frequency.
[0007]
[Means for Solving the Problems]
The present invention relates to a link rod connecting the vehicle body frame of an automobile, and members coupled to the transverse link comprising a member which is suspended from the body frame, the vehicle up and down a plate shape of a required width a rod main portion extending in a direction, the a mounting portion attached to the body frame side, is made extending bent relative to the rod extending direction from an end on the rod main portion, substantially of the extension formation part a first mounting portion mounting hole is formed with a vertical direction of the vehicle axis to the central portion, a mounting portion attached to said member side, made extended under end of the rod main portion, and a second mounting portion having a mounting hole having a direction of axis that intersects with the axis and the eccentric position of the first mounting portion, Tona is, are press-formed integrally from the metal plate, the rod main The part is bent in the width direction at the center, and the front Ri reinforcement flange on both side edges of the rod main portion Na is formed bent to the side of the first mounting portion, said reinforcing flange is formed continuously to said first attachment portion, said rod main In the bent portion from the first portion to the first mounting portion, the flange height is formed so as to be gradually decreased, and the flange is extended outwardly bent at the bent portion. An edge is provided .
[0008]
The link rod can be easily manufactured by press molding, unlike the case of processing from a pipe material. In addition, the reinforcing flanges on both side edges of the rod main portion can retain sufficient strength despite being made of a plate material. In particular, the flange is bent from the rod main portion to at least the first mounting portion. Since it is continuously formed up to the end of the part, the strength at the bent part is reliably maintained and a predetermined spring constant can be maintained. In particular, since this flange is coupled to the first attachment portion, the first attachment portion can be reinforced together with the bent portion.
[0009]
Moreover, because it is by press molding from a plate material, it is easy to perforate or change the plate thickness and flange height, and the strength and mass can be adjusted easily, and the spring constant can be easily analyzed by model analysis. Since it can be obtained, it is easy to set the eigenvalue of the vibration frequency.
[0010]
Moreover, since the extending chime extending is bent outward in the bent portion of the rod main portion of the reinforcing flange to the first attachment portion is provided, the most stress concentration occurs easily the bent portion Can be more effectively reinforced.
[0011]
Further, in the above link rod, when the cylindrical mounting edge is provided on the periphery of the mounting hole of the first mounting portion and the second mounting portion, the rubber bush can be fitted and fixed with good stability, and the mounting state And the cylindrical projecting edge serves to reinforce the plate-like mounting portion.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described based on examples shown in the drawings.
[0013]
1 to 5 show a first embodiment of the link rod of the present invention. In the figure, reference numeral 1 denotes a link rod according to the present invention, which is integrally formed by press molding using a metal plate such as a steel plate as a raw material.
[0014]
The link rod 1 includes a rod main portion 2 that has a plate shape having a required width and a required length and extends in the vertical direction, a first attachment portion 10 that is connected to one end portion of the rod main portion 2, and the other end. And a second mounting portion 20 connected to the portion. The first mounting portion 10 is bent and bent at a required radius in a direction substantially perpendicular to the plate surface with respect to the rod extending direction from the upper end of the rod main portion 2, for example, and substantially at the center of the extending portion. A fitting hole 11 for fitting a bush having a vertical axis is formed in the part. The second mounting portion 20 is a bush that extends in substantially the same direction as the extending direction of the rod main portion 2 and has an axis that intersects the axis of the first mounting portion 10 at an eccentric position. A fitting hole 21 for fitting is formed. The first attachment portion 10 and the second attachment portion 20 are attached to one and the other of the body frame or the member via rubber bushes (not shown), respectively.
[0015]
More specifically, the first mounting portion 10 is mounted on the vehicle body frame side with the axis centered in the vertical direction, that is, the plate surface is horizontal, and the second mounting portion 20 is coupled to the transverse link. Attached to the member side.
[0016]
In the case of the first embodiment, the rod main portion 2 is formed to bend in the front-rear direction at the center portion in relation to the mounting space and the like inside the vehicle, and further slightly to the plate surface on the second mounting portion 20 side. And the plate surface of the second mounting portion 20 is substantially parallel to the axis of the first mounting portion 10.
[0017]
The rod main portion 2 is formed with reinforcing flanges 3 and 3 on both side edges in the width direction, particularly on the same side as the bent and extended side of the first mounting portion 10 at a substantially right angle. The section on the side of the first mounting portion of the flanges 3 and 3 is the end on the first mounting portion side in the bent portion 4 from the rod main portion 2 to the first mounting portion 1. In other words, it is coupled to the end of the bending radius so that the bent portion 4 can be reinforced. In the case of the figure, the end portions 31, 31 of the flanges 3, 3 are inclined and coupled to the portion of the first mounting portion 1 so as to achieve a better reinforcing action.
[0018]
Further, in the case of this embodiment, the reinforcing flanges 3, 3 have extended edges 3 a, which are bent and extended outward at the bent portion 4 from the rod main portion 2 to the first mounting portion 10. 3a is provided so that the bent portion 4 where stress concentration is most likely to occur can be reinforced more effectively.
[0019]
Further, the end portions 32 and 32 on the second mounting portion 20 side of the reinforcing flanges 3 and 3 are inclined and coupled to the second mounting portion 20 and terminate from the rod main portion 2. It is provided so that the continuous portion 5 to the second mounting portion 20 can be reinforced. Of course, the flanges 3 and 3 may be extended to the edge portions of the first mounting portion 10 and the second mounting portion 20 to reinforce both the mounting portions 10 and 20.
[0020]
Cylindrical protruding edges 12 and 22 are formed on the periphery of the mounting hole 11 of the first mounting portion 10 and the periphery of the mounting hole 21 of the second mounting portion 20, respectively, and the rubber bushes are fitted and held with stability. It can be done.
[0021]
In the illustrated embodiment, the bent portion 4 from the rod main portion 2 to the first mounting portion 10 has a slightly constricted shape, but this portion does not necessarily have to be a constricted shape.
[0022]
The plate thickness of the link rod 1 can be appropriately set according to the required strength and mass, and is, for example, 3 to 5 mm. Also, the height of the reinforcing flanges 3 and 3 can be set as appropriate according to the required strength, mass, etc., and the flanges 3 and 3 do not have to be continuous at the same height over the entire length. Reference numeral 24 denotes a setting hole for mounting and setting a material to be processed on the support member during press molding.
[0023]
FIGS. 6-8 has shown 2nd Example of the link rod 1 of this invention, The same code | symbol is attached | subjected to the same component as the above-mentioned 1st Example, and the detailed description is abbreviate | omitted.
[0024]
In the case of the link rod 1 according to the second embodiment, the basic configuration thereof, that is, the first mounting portion 10 and the second mounting portion 20 provided at both ends of the rod main portion 2, and the width of the rod main portion 2 are provided. The basic configurations of the reinforcing flanges 3 and 3 provided on both side edges in the direction and the extended edges 3a and 3a in the bent portion 4 are the same as those in the first embodiment. And in this 2nd Example, in order to achieve weight reduction of the whole rod, the following structures are employ | adopted.
[0025]
The rod main portion 2 is formed with one or a plurality of through-holes 25 in addition to the setting holes 24 for press molding at required portions that do not affect the strength and the like in use. Further, the reinforcing flanges 3, 3 are inclined so that the end portions 32, 32 on the second mounting portion 20 side gradually decrease the height of the flange, and the second end from the rod main portion 2. Is terminated before reaching the continuous portion 5 to the mounting portion 20. That is, since the plate surface of the second mounting portion 20 extends in substantially the same direction as the extending direction of the rod main portion 2, stress concentration occurs in the continuous portion 5 between the rod main portion 2 and the second mounting portion 20. Hardly occurs. Therefore, even if the reinforcing flanges 3 and 3 are terminated before reaching the continuous portion 5 as described above, there is no problem in strength.
[0026]
Furthermore, the first mounting portion 10 has a substantially triangular outer shape at the tip end portion, and a through hole 26 is formed at the tip portion. Further, the outer shape of the second mounting portion 20 is circular.
[0031]
In the second embodiment as well, the thickness of the link rod 1 can be set as appropriate according to the required strength and mass, and the reinforcing flanges 3 and 3 are set as appropriate according to the required strength and mass. it can.
[0032]
Link rod 1 of the present invention having the structure described above is to use a member that is coupled to the vehicle transverse link, to support the suspended state coupled to the body frame, a first attachment The part 10 is attached and fixed to the vehicle body frame side through a rubber bush fitted in the attachment hole 11 provided therein, and the second attachment part 20 is also provided with a rubber bush fitted in the attachment hole 21 provided therein. And fix to the member side.
[0033]
The rubber bush is usually formed by interposing a rubber-like elastic body between an inner cylinder and an outer cylinder. The outer cylinder is press-fitted into the mounting holes 11 and 21 and fitted into the inner cylinder. An attachment shaft such as a bolt is inserted and fastened to the body frame or member. Attached to the member side may also be attached by transformer Bath links and tightened.
[0034]
In this state of use, the reinforcing effect by the flanges 3 and 3 provided on both side edges of the rod main portion 2 can provide sufficient strength despite being made of a plate material. In particular, the flanges 3 and 3 are coupled from the rod main portion 2 to at least the rounded end of the bent portion 4 to the first mounting portion 10, for example, to the first mounting portion 10 as shown in the figure. The bent portion 4 is reinforced, has sufficient strength, and can secure a predetermined spring constant. Further, as shown in the figure, since the extended edges 3a and 3a bent outward are formed in the bent portions 4 of the flanges 3 and 3, the bent portions 4 that are likely to cause stress concentration are further provided. As a result, the spring constant of the link rod 1 itself can be increased.
[0035]
And since it is by press molding from a board | plate material, manufacture processing is easy and it can provide at low cost, and also the drilling process and the change of the height of the flange 3 are easy. For this reason, the strength and mass can be calculated with a design model, the spring constant can be predicted with model analysis, and the eigenvalue of the vibration frequency can be easily obtained by calculation. Therefore, the eigenvalue of the vibration frequency can be arbitrarily set according to the vibration isolation characteristics by controlling the strength and mass of the link rod, and the stress concentration portion can be easily reinforced.
[0036]
For example, for comparison between Example and the conventional of the present invention, a model of the first embodiment of the present invention by press molding a plate material as shown in FIGS. 1 to 5, a pipe shown in FIGS. 9 to 12 Table 1 below shows the spring constants and eigenvalues of the vibration frequency obtained by analyzing the conventional model made of the material.
[0037]
The conventional model is flattened from a pipe material having a thickness of 2 mm, the thickness of the first mounting portion 110 and the second mounting portion 120 is 4 mm, the width dimension of the rod main portion 102 is 40 mm, and the thickness direction. The dimension is 15 mm, and the distance between the plate surface of the first mounting portion 110 and the axis of the second mounting portion 120 is about 197 mm.
[0038]
Further, the model of the embodiment product of the present invention is pressed from a plate material having a thickness of 4 mm, the rod main part 2 has a width direction dimension of 40 mm, the flange 3 has a height dimension of 13 mm, and the first mounting part 10 has a plate surface. And the distance between the axis of the second mounting portion 20 and the axis of the second mounting portion 20 is about 192 mm.
[0039]
[Table 1]

[0040]
As described above, in the model of the embodiment product of the present invention, the eigenvalue of the vibration frequency is almost the same as that of the conventional product. In addition, the spring constant was significantly higher than the conventional product. This is considered to be due to the fact that the flange 3 is provided in the bent portion 4 and the extended edge 3a by bending outward is formed on the flange 3 so that the strength is greatly increased.
[0041]
Incidentally, For a Rinkuro' de of the second embodiment shown in FIGS. 6 to 8, since the basic configuration, the reinforcing effect of particular flange 3 and extending chime 3a is exerted similarly, the Example Product Model In the same manner as described above, the natural value of the vibration frequency almost equal to that of the conventional product can be obtained, and a spring constant higher than that of the conventional product can be obtained. Further, the structure can reduce the weight.
[0042]
【The invention's effect】
As described above, since the link rod of the present invention is press-molded from a plate material, it can be easily manufactured and provided at a low cost, and even if it is made of a plate material, sufficient strength is provided by the reinforcing flange. Furthermore, the strength, mass, and spring constant can be easily adjusted by changing the thickness of the link rod and the flange, and the eigenvalue of the vibration frequency can be set arbitrarily. Therefore, the link rod of the present invention is easy to manufacture and can be easily adjusted in strength and mass, and the eigenvalue of the vibration frequency can be set arbitrarily. It can be suitably used as a link rod to be connected.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first embodiment of a link rod according to the present invention.
FIG. 2 is a side view of the same link rod.
FIG. 3 is a front view of the same link rod.
FIG. 4 is a plan view of the same link rod.
5 is a cross-sectional view taken along line X1-X1 of FIG.
FIG. 6 is a side view of a second embodiment of the link rod according to the present invention.
FIG. 7 is a front view of the same link rod.
FIG. 8 is a plan view of the same link rod.
FIG. 9 is a perspective view of a conventional link rod.
FIG. 10 is a side view of the same link rod.
FIG. 11 is a front view of the above-described link rod.
FIG. 12 is a sectional view taken along line X2-X2 of the previous figure.
[Explanation of symbols]
(1) Link rod (2) Rod main part (3) (3) Reinforcing flange (3a) (3a) Extension edge (4) Bent part (10) First mounting part (11) Mounting hole (12) Cylindrical ridge (20) Second mounting portion (21) Mounting hole (22) Cylindrical ridge

Claims (4)

A link rod that connects a body frame of an automobile and a member that is suspended from the body frame and is coupled to a transverse link;
A rod main portion extending in the vehicle vertical direction in a plate shape of a required width;
Wherein a mounting portion attached to the body frame side, wherein the upper end of the rod main portion is made extending bent relative to the rod extending direction, in a substantially central portion of the extension formation portion in the vehicle vertical direction axis A first mounting part having a mounting hole having a center;
Wherein a mounting portion attached to the member side, the made-rolled under end of the rod main portion, and said first mounting hole having a direction of axis that intersects with the axis and the eccentric position of the mounting portion a second attachment portion having, Ri Tona,
It is press-molded integrally from a metal plate,
The rod main portion is bent in the width direction at the central portion, Ri Na is bent formed on the side of the reinforcement flange on both side edges of the rod main portion of the first mounting portion,
The reinforcing flange is coupled to the first mounting portion, and is formed to be inclined so as to gradually reduce the height of the flange at the bent portion from the rod main portion to the first mounting portion. The link rod is characterized in that the flange is provided with an extended edge that is bent outwardly at the bent portion . The reinforcing flange has an end on the second mounting portion side inclined so as to gradually reduce the height of the flange, and reaches a continuous portion from the rod main portion to the second mounting portion. 2. The link rod according to claim 1, wherein the link rod is terminated by a predetermined time. The link rod according to claim 1, wherein one or a plurality of through holes are formed in the rod main portion. It said first mounting portion and the second one link rod according to one of claims 1 to 3, the tubular flange on the peripheral edge of the mounting hole of the mounting portion is provided.

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