JPS6048272B2 - Manufacturing method of bracket for cylindrical container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a bracket for attaching, for example, a hydraulic shock absorber, a suspension spring device, a gas spring, etc. (hereinafter referred to as a cylindrical container) to a vehicle.

1 to 3 show a conventional method of manufacturing a bracket, in which a spring seat 2 is fixed above a main body 1 of a cylindrical container, and an actuating cylinder 3 is inserted into the main body layer.

For example, a piston (not shown) equipped with a damping force generating mechanism is slidably provided in the working cylinder 3, and a piston rod 4 having one end fixed to the piston is attached to the working cylinder 3.
It protrudes outward, and a screw 4A for attaching to the vehicle body is formed at its tip. 5 is a lock ring that fixes the operating cylinder 3.

6 in the figure is a bracket for attaching the main body 1 to the chassis,
The bracket 6 is composed of an outer bracket 7 having a substantially U-shaped cross section and an inner bracket shaft 8 having a substantially U-shaped cross section.

The outer bracket 7 consists of an annular portion 7A and a parallel portion 7B extending continuously from the annular portion 7A. The inner bracket 8 includes a curved back portion 8A that comes into contact with the main body 1, and a parallel portion 8B that is fitted into the parallel portion 7B. outer bra 5
The inner bracket 8 is fitted to the parallel portion 7B of the get 7, and appropriate positions of the parallel portions 7B and 8B of both are made into welded portions 9, and the welded portions 9 are welded at several locations using spot welding means and fixed. The main body 1 is attached to the bracket 6 constructed in this way.
is press-fitted and welded around the entire circumference of the lower end face 10 by fillet welding means. Reference numeral 11 denotes a mounting hole for mounting the cylindrical container to a mounting fixture on the vehicle body.

However, in such a conventional method, the welding part 9 is only spot welded, so in order to maintain the strength, the welding part 9 must be welded with strong pressure, and the inner surface of the inner bracket 7 may be welded. There was a drawback that protrusions 12 were formed due to indentations during welding.

Therefore, in order to attach the cylindrical container to the vehicle body, there was a drawback that the inner surface had to be subjected to secondary processing such as cutting the protrusion 12. On the other hand, since the annular portion 7A of the outer bracket 7 is straight, there is a drawback that press-fitting the main body 1 is extremely difficult. Furthermore, FIG. 4 shows another conventional method for manufacturing a bracket. In this method, a protrusion 13 for projection welding is formed on the parallel portion 7B of the outer bracket 7, and the protrusion 13 is welded by projection welding. It is fixed by welding.

However, although this method can maintain sufficient welding strength, protrusions 14 are formed on the inner surface of the inner bracket 8, and as in the case of spot welding, the protrusions 14 must be cut, and the welding Parallel parts 7B, 8 due to burrs
There was a drawback that a gap d was created in B, and rust was generated from this gap d. The present invention improves the drawbacks of the conventional method, and will be described below with reference to embodiments shown in FIGS. 5 to 10.

5 to 8 show a first embodiment of the present invention.
The same components as those shown in FIGS. 3 to 3 are denoted by the same reference numerals. Reference numeral 21 indicates a bracket manufactured by the method of the present invention, and the bracket 21 has an outer bracket 22 having a substantially U-shaped cross section. , and an inner bracket 23 having a substantially U-shaped cross section.

First, the outer bracket 22 has an annular portion 22A surrounding the main body 1.
) A parallel portion 22B extending continuously from the annular portion 22A)) A bent portion 22C whose upper end portion is bent outward over the entire circumference. In addition, the inner bracket 23 is
(23A) A curved back surface part 23A that is in contact with the main body 1) A parallel part 23B that is continuous with the back surface part 23A and is fitted into the parallel part 22B of the outer bracket 22) An upper end portion of the back surface part 23A in the opposite direction (outward) Bent part 23C) Said parallel part 23
A protruding portion 23D having a length slightly longer than the axial length of the outer bracket 22 formed on the upper part of the outer bracket 23B. Here, the protruding portion 23D is formed in a straight line continuous with the parallel portion 23B, and only the bent portion 23C is bent outward. In order to fix each bracket 22, 23 having such a shape, the parallel part 23B of the inner bracket 23 is attached to the inner periphery of the parallel part 22B of the outer bracket 22.
and fit together so that the protrusion 23D of the inner bracket 23 protrudes.

That is, the brackets 22 and 23 are fitted so that their lower end surfaces are flush with each other. Next, the protruding portion 23D and the bent portion 22C
The r-shaped portion formed by the two is welded and fixed using flare type group welding means.

In the figure, 24 is a welded portion. Note that before welding the welding portion 24, the parallel portions 22B and 23B may be lightly fixed by spot welding or the like as temporary attachment. A method for fixing the bracket 21 manufactured in this way to the main body 1 will be explained with reference to FIG. 9.

First, as shown in FIG. 9A, the main body 1 is press-fitted from the annular enlarged diameter portion formed by the bent portions 22C and 23C. When press-fitting,
The lower end of the main body 1 can be easily fitted into the annular enlarged diameter portion of the bracket 21, making it easy to press fit, and since the bracket 21 is welded with sufficient strength at the welded portion 24, it will not be damaged. do not have. Next, as shown in FIG. 9B, fillet welding is performed around the entire circumference of the lower end surface 10, and the bracket 2 is welded.
1 and the main body 1 are fixed. Furthermore, the mounting holes 11 may be finally drilled as shown in FIG. 9C. Note that even if mounting holes are pre-drilled in the outer bracket 22 and inner bracket 23, it is difficult to align the axes of the mounting holes when welding them together, so it is difficult to align the axes of the mounting holes in the final process as shown in Figure 9C. I learned that it would be better to drill hole 11. Furthermore, FIG. 10 shows a front view of a bracket manufactured by another method according to the present invention, and the same components as in FIGS. 5 to 8 are given the same reference numerals.

The feature of this embodiment is that the upper end portion of the inner bracket 23 is bent in the same direction as the bent portion 22C of the outer bracket 22 to form a bent protrusion 23E, and the periphery of the bent protrusion 23E and the outer bracket 22 are bent. A welding means is used to weld the curved portion 22C to form a welded portion 24 at this portion. In the first embodiment shown in FIGS. 5 to 8, since the r-shaped portion between the protrusion 23 (D) and the bent portion 22C is welded, welding over the protrusion 23D and welding to the inner surface of the protrusion 23D causes burrs and deformation. However, in this embodiment, the periphery of the bent protrusion 23E is welded, so there is no risk of welding burrs forming on the inner surface.

1 The present invention is constructed as described above, and although the bent portion 23C is described as being formed in the inner bracket in the embodiment of the present invention, the bent portion 23C is not necessarily necessary. Even if it is formed, it will not interfere with the press-fitting work of the main body 1.

The present invention has been described in detail above, and has the following effects.

1 The upper ends of the parallel parts of the outer bracket and the inner bracket are configured to be flare group welded or fillet welded, which provides sufficient strength compared to conventional spot welding or projection welding. be able to.

2 When welding the outer bracket and inner bracket,
Since there is no risk of protrusions being formed on the inner surface of the inner bracket due to indentations, there is no need for secondary processing such as cutting protrusions when attaching the bracket to a mounting fixture on the vehicle body.
Workability can be improved.

3. Since the upper end portion of the outer bracket is bent outward to form a J-bent portion, the work of press-fitting the main body into the bracket can be performed extremely easily.

4. If the upper end portion of the back surface of the inner bracket is also bent outward in relation to item 3 above, the press-fitting operation will be made easier.

5. Since the outer bracket and inner bracket can be welded around the entire circumference, there is no risk of rust.

[Brief explanation of the drawing]

Figure 1 is an overall view of a cylindrical container with a bracket manufactured by a conventional method attached, Figure 2 is a sectional view taken in the direction of the ■-■ arrow in Figure 1, and Figure 3 is a perspective view of the bracket attached to Figure 1. 4 is a partial front view of a bracket manufactured by another conventional method, FIG. 5 is a partial view of a cylindrical container to which a bracket manufactured by the method of the present invention is attached, and FIG. 6 is a partial front view of a bracket manufactured by the method of the present invention. A perspective view of the bracket manufactured by the method, FIG. 7 is a front view seen from direction A in FIG. 6, and FIG. 8 is a perspective view of the bracket manufactured by the method shown in FIG.
9A-9C are perspective views showing the process of attaching the bracket manufactured by the method of the present invention to a cylindrical container, and FIG. 10 is a cross-sectional view of the bracket manufactured by another method according to the present invention. It is a front view. 1...Body, 21...Bracket,
22...Outer bracket, 22A...
Annular part, 22B...Parallel part, 22C...
・Bending part, 23...Inner bracket, 23A・
...Back part, 23B...Parallel part, 23C
......Bending portion, 23D...Protruding portion, 23
E...Bending protrusion.

Claims (1)

[Claims] 1. The outer bracket, which has a substantially U-shaped cross section, includes an annular portion surrounding the cylindrical container, a parallel portion continuing approximately parallel to the annular portion, and a bent portion with the upper end portion bent outward. The inner bracket, which has a substantially U-shaped cross section, has a back surface that comes into contact with the cylindrical container, a parallel section that is continuous with the back surface and fits into the parallel section of the outer bracket, and an axial length. The inner bracket is inserted so that the upper end thereof protrudes from the inner surface of the parallel part of the outer bracket formed in this way, and the outer bracket is further bent. A method for manufacturing a bracket for a cylindrical container, characterized in that the bracket and the protruding part of the inner bracket are welded together by welding means. 2. The method of manufacturing a bracket for a cylindrical container according to claim 1, wherein the upper end portion of the back surface of the inner bracket that contacts the cylindrical container is bent outward. 3. Of the inner bracket, the protruding part formed at the upper part of the parallel part is formed in a straight line continuous with the parallel part, and the r-shaped part formed by the protruding part of the inner bracket and the bent part of the outer bracket is formed. A method for manufacturing a bracket for a cylindrical container according to claim 1, wherein the bracket is welded. 4. A patent in which the upper end of the protruding part of the inner bracket is bent in the same direction as the bent part of the outer bracket, and the periphery of the bent protruding part and the bent part of the outer bracket are welded together. A method for manufacturing a bracket for a cylindrical container according to claim 1.