JPH09254621A - Cylindrical bush type link - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a cylindrical bush type link by reducing the number of part items, and facilitating its manufacture. SOLUTION: A cylindrical bush type link 2, which has cylindrical parts 13, 14 into which cylindrical rubber bushes 7, 8 are fitted, at both ends of its link part 15, is constructed as follows: first, two pressed plates 1 of the same shape which are press molded and each of which has short cylinders 3, 4 at both ends of a connection 5 are stacked; the cylindrical parts 13, 14 are then constructed of the short cylinders 3, 3, 4, 4 stacked one on the other, and the link part 15 is constructed of the connections 5, 5, with the cylindrical rubber bushes 7, 8 pressed into the respective cylindrical parts 13, 14 throughout the short cylinders 3, 3, 4, 4 to secure the pressed plates 1 together via the cylindrical rubber bushes 7, 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical bush type link used for a vehicle suspension or the like.

[0002]

2. Description of the Related Art As a conventional technique of this kind, FIGS.
There is one as shown in 3. In this cylindrical bush type link A, two cylindrical parts g and h made of iron are welded to both ends of a link part i made of a steel rod or a steel pipe, and cylindrical rubber bushes j and k are press-fit into both cylindrical parts g and h. It will be done. The rubber bushes j and k are made of an iron outer cylinder m and an inner cylinder n, and both cylinders m and n.
It is composed of an insulator rubber p bonded by vulcanization. Thus, the pushing or pulling input is transmitted from one of the inner cylinders n of the two cylindrical rubber bushes j and k to the other.

An example of the use of such a cylindrical bush type link A is shown in FIG. This figure shows a suspension for the rear wheels of an automobile, which connects points a and c and points b and d.
After combining the links A and B of the book so that each point is ac: bc = bc: cd, and each mounting point is rotatable,
When the position of the point a is fixed and the point b is movable only in the lateral direction, the point d draws an approximate straight line up and down, and the vehicle body (not shown) to which the point d is attached can be moved only up and down. I have to. Reference numeral e indicates a torsion beam, reference numeral w indicates a rear wheel, the link A constitutes a control rod, and the link B constitutes a lateral link.
Here, the point a in FIG. 13 is the center of the inner cylinder n of the cylindrical rubber bush k in FIGS. 11 and 12, and FIG.
The point c at 3 is the center of the inner cylinder n of the cylindrical rubber bush j in FIGS.

[0004]

However, the cylindrical bush type link A is made of three independent members of two cylindrical parts g and h and a link part i between them, and the link i The cylindrical portions g and h are joined by welding. Therefore, there is a problem that the manufacturing cost of the link A becomes high when the cost of individually forming the three independent members and the welding cost are combined.

Further, although there are two welding points in the direction in which the force is transmitted, since it is generally difficult to secure the strength of welding as compared with other points, strict quality control is required. Therefore, there is a problem that it is difficult to increase the manufacturing efficiency because the welding work becomes careful.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to reduce the number of parts of the cylindrical bush type link, to facilitate the manufacture and to reduce the cost thereof. .

[0007]

The invention of the cylindrical bush type link according to claim 1 uses a plate press product which is press-molded and is provided with a short cylinder individually at both ends of the connecting portion. Two of the plate-pressed products are superposed on each other to form the cylindrical portion by the mutually overlapping short cylinders of the two plate-pressed products. Further, the link portion is constituted by the connecting portions of the two plate pressed products. Further, by press-fitting a cylindrical rubber bush into the cylindrical portion across both short cylinders, both plate press products are fixed to each other via the cylindrical rubber bush.

It is preferable that the sheet press products are superposed on each other such that the front surface sides or the back surface sides of the sheet press products face each other, but the front surface side of one sheet press product and the back surface of the other sheet press product. It may be performed with the side facing. Both overlapping short tube parts have the same inner diameter, and these form a series of cylindrical parts. The inner diameters of the cylindrical portions at both ends of the link portion may be the same or different.

Thus, according to the present invention, the number of parts is reduced because the two cylindrical parts and the link part between them are made of two plate press parts, and the force transmission path between both cylindrical parts is reduced. Since no welding means is used inside, and since both plate pressed products are joined by press fitting a cylindrical rubber bush, it is easy to assemble and the cylindrical bush type link is easily manufactured, reducing the manufacturing cost. Become.

The invention of the cylindrical bush type link of claim 2 is the same as that of claim 1 above, and it is preferable that the two plate pressed products have the same shape. When the two plate pressed products have the same shape, the link part and the cylindrical parts at both ends thereof can be molded by one mold, so that the manufacturing cost can be further reduced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 6 are views showing a first embodiment, and particularly FIGS. 1 to 3 show a plate press product 1 and FIGS.
Indicates a cylindrical bush type link 2.

The plate-pressed product 1 is integrally formed by pressing a steel plate, and has two short tubular parts 3 and 4 and a connecting part 5 having a concave cross section for connecting these. It has an eyeglass shape and has short tube parts 3 and 4 and a connecting part 5.
Is formed with a flange 6 on the same plane, and this flange 6 forms a reinforcing portion of the whole plate press product 1. Although the inner diameters of the short tubular portions 3 and 4 are different from each other, it goes without saying that they may be the same. Further, the internal spaces of the short tubular portions 3 and 4 communicate with the internal space of the connecting portion 5.

As shown in FIGS. 4 to 6, two sheet press products 1 thus formed are prepared to form one set,
These are in contact with the flanges 6 and the short tube portions 3 and 4 having the same diameter are superposed and combined on the same axis line,
As a result, the two short tubular portions 3 form the cylindrical portion 13, and the two short tubular portions 4
The cylindrical portion 14, and the link portion 15 by the two connecting portions 5.
Are configured respectively. The link portion 15 is a connecting portion 5 having a concave cross section.
Since they are configured so as to face each other, a closed space is formed inside to form a tubular shape, so that the strength is increased in combination with the reinforcing action of the flange 6.

The cylindrical rubber bushes 7 and 8 are individually press-fitted into the cylindrical portions 13 and 14, respectively. The cylindrical rubber bushes 7 and 8 each include an inner cylinder 16 and an outer cylinder 17 made of steel, and an insulator rubber 18 vulcanized and bonded between them. The rigidity of the insulator rubber 18 in the axial direction of the link portion 15 and the direction orthogonal to the axial direction can be changed by forming the space portion.

The cylindrical rubber bushes 7, 8 are connected to the cylindrical portion 13,
By being press-fitted in 14, the two short tubular portions 3 and the two short tubular portions 4 are cylindrical rubber bushes 7, 8
And a pair of plate pressed products 1 are integrally connected to form a cylindrical bush type link 2.
Therefore, the press-fitting of the cylindrical rubber bushes 7 and 8 also has a function of joining the two plate pressed products 1 in addition to simply incorporating the cylindrical rubber bushes 7 and 8.

Further, the press-fitting is performed by pressing two plates 1
With the flanges 6 close to each other, and with both flanges 6 in parallel and facing each other at a predetermined interval, and between the short tube portions 3, 3 of both plate pressed products 1 and the short tube portion 3 coaxially. The cylindrical rubber bush 7 is sandwiched between the short cylinder parts 4 and 4
A method in which a cylindrical rubber bush 8 is sandwiched between them so as to be coaxial with the short tubular portion 4 and then pressure is applied to both plate press products 1 in a direction in which both plate press products 1 approach each other Good to do. Then, since the round tubular portions 3 and 4 and the connecting portion 5 and the round tubular portions 3 and 4 and the flange 6 in the plate press product 1 are formed with the rounded portions 3a and 4a,
The rounded portions 3a and 4a serve as guides to facilitate the press-fitting.

Thus, according to this embodiment, two
By simply press-fitting the cylindrical rubber bushes 7 and 8 into the cylindrical portions 13 and 14 composed of the short cylindrical portions 3 and 3 and the short cylindrical portions 4 and 4 of the pair of plate pressed products 1, both cylindrical rubber bushes 7 are pressed. The cylindrical bush type link 2 can be constructed without welding the input transmission path between the inner cylinders 16, 8.

The cylindrical bush type link 2 is installed between the two members by bolts or the like inserted into the inner cylinders 16 of the cylindrical rubber bushes 7 and 8 to transmit the force between the two members. To do.

In this embodiment, the two plate press products 1 are the same, and the plate press product 1 is the same.
It is sufficient that one type of press die is used for molding, but if the short tube portions 3 and 3 and the short tube portions 4 and 4 have the same diameter, the plate press products 1 are not necessarily connected to each other. It does not have to be the same. For example, the lengths of the short tubular portions 3 and 4 may be different between the plate pressed products 1, and the cross-sectional shape of the connecting portion 5 may be different.

Further, both connecting portions 5 forming the link portion 15
By welding at the flange 6, as shown in FIG. 7, the strength of the link portion 15 can be further improved. This is particularly effective when the cylindrical bush type link 2 has a long link portion 15. This welding may be performed continuously along the longitudinal direction of the connecting portion 5, or may be performed at one or several locations in a part such as near the center in the longitudinal direction. Further, instead of this welding, one of the flanges 6 facing each other as shown in FIG. 8 may be bent and engaged with the other flange 6. Also in this case, it is possible to continuously engage along the longitudinal direction of the connecting portion 5, or to engage at a part thereof. Further, the flanges 6 on the outer circumferences of the short tube portions 3, 4 can be welded or engaged with each other in the same manner as the welding or engagement of FIG. 7 or FIG. It is also possible to form concavities and convexities between the flanges 6 at any position of the flanges 6 and engage these concavities and convexities. It is advisable to form these irregularities at the same time when the plate press product 1 is press-molded. Furthermore, it is also possible to rivet both flanges instead of the welding, engagement or concave-convex engagement.

FIG. 9 and FIG. 10 are views showing a second embodiment. In this example, two plate press products 1 are arranged so that each flange 6 is on the side far from each other. The shape is opposite to the shape, and the cylindrical rubber bushes 7 and 8 are press-fitted into the cylindrical portions 13 and 14 formed thereby. Therefore, in the two plate press products 1, the concave surfaces of the connecting portions 5 face opposite to each other, and the connecting portions 5 are opened to be parallel to each other. Thus, since the two connecting portions 5 are separated from each other on both sides in the axial direction of the cylindrical rubber bushes 7 and 8, even if the input to the cylindrical rubber bushes 7 and 8 is inclined with respect to the longitudinal direction of the link portion 15, sufficient strength is obtained. Can be obtained. It should be noted that in this embodiment, the flange 6 has both connecting portions 5
Welding or engaging one another is difficult.

The other structure and operation are the same as those of the first embodiment, and the duplicated description will be omitted. Further, in both of the above-described embodiments, the cylindrical rubber bushes 7 and 8 are press-fitted into the cylindrical portions 13 and 14 in a state in which the plate pressed products 1 face each other or are diametrically opposed to each other. With the flanges 6 of both plate pressed products 1 facing up or the flanges 6 of both plate pressed products 1 facing down, the short tube portions 3 and 3 and the short tube portions thereof. It is also possible to form the cylindrical bush type link 2 by press-fitting the cylindrical rubber bushes 7 and 8 into the cylindrical portions 13 and 14 formed of 4 and 4.

It is needless to say that the cylindrical bush type link 2 described above can be used in a vehicle suspension other than that shown in FIG. 13, that is, in a suspension having another structure or in a portion other than the suspension. In such a case, it goes without saying that the dimensions of the respective parts such as the diameters of the cylindrical parts 13 and 14 and the length of the link part 15 are set in accordance with the intended use.

[0024]

As described above, according to the invention of claim 1, the number of parts is reduced because the two cylindrical parts and the link part between them are made of two plate press parts, and both cylinders are Since no welding means is used in the force transmission path between the parts,
Further, since the two pressed plate products are joined together by press-fitting a cylindrical rubber bush, the assembly is simple, and the cylindrical bush type link is easily manufactured, so that there is an effect that the cost is reduced.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effect of the invention described above, since the two plate press products have the same shape, there is an effect that the manufacturing cost can be further reduced because only one type of press mold is required.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a plate pressed product according to a first embodiment.

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a partially cutaway front view showing the cylindrical bush type link of the first embodiment.

FIG. 5 is a plan view and a bottom view of FIG.

FIG. 6 is a perspective view of FIG.

FIG. 7 is a cross-sectional view when the connecting portions are welded together.

FIG. 8 is a cross-sectional view when the connecting portions are engaged with each other.

FIG. 9 is a cross-sectional view showing a second embodiment.

FIG. 10 is a sectional view taken along line YY of FIG. 9;

FIG. 11 is a front view showing a conventional cylindrical bush type link.

FIG. 12 is a plan view and a bottom view of FIG. 11.

FIG. 13 is an explanatory view showing a usage state of the cylindrical bush type link of FIG. 11.

[Explanation of symbols]

 1 Plate Pressed Product 2 Cylindrical Bushing Link 3,4 Short Tube Section 5 Connecting Section 6 Flange 7,8 Cylindrical Rubber Bushing 13,14 Cylindrical Section 15 Link Section

Claims (2)

[Claims] 1. A cylindrical bush type link having a cylindrical portion containing a cylindrical rubber bush at both ends of a link portion, and two plate press products which are press-molded and each of which has a short tube at each end of the connecting portion. And the link portion is formed by connecting the connecting portions of the two plate-pressed products to each other. By pressing the cylindrical rubber bush over the short cylinder,
A cylindrical bush type link characterized in that two pressed plate products are fixed to each other via this cylindrical rubber bush. 2. The cylindrical bush type link according to claim 1, wherein the two pressed plates have the same shape.