KR0128645Y1 - Cohesive structure of low center pillar for an automobile - Google Patents

Abstract

The present invention relates to an improved center pillar bulkhead of a three-door hatchback type vehicle and a side lower body coupling structure using the same. The improved center pillar bulkhead has a base having a protrusion 15 protruding upward for rigidity. 13) and a center pillar bulkhead body 11 having two side portions 14 and 14 'extending upwardly from both sides of the base and one side portion 14 of the two side portions 14 and 14'. It is formed into a bracket extending 12 and consists of a bracket portion 12 is attached to the retractor fixing nut.

When the center filler bulkhead of the present invention is adopted, the welding point and the thickness thereof are reduced, so that the welding performance is improved and the strength is excellent, thereby increasing the safety.

Description

Coupling structure under the center pillar of automobile

1 is a view showing a mounting structure of a center pillar bulkhead of a conventional three-door hatchback vehicle.

2 is a perspective view showing the center pillar bulkhead and retractor bracket of FIG.

Figure 3 is a perspective view showing a center filler bulkhead according to the present invention.

Figure 4 is a cross-sectional view showing a coupling structure of the lower side vehicle body to which the center pillar bulkhead is applied according to the present invention.

* Explanation of symbols for main parts of the drawings

1: outer side panel 2: center filler reinforcing member

3: inner side panel 6: side floor panel

10: center filler bulkhead 11: the center filler bulkhead body

12: bracket portion 13: base

14,14: side

The present invention relates to a coupling structure under the center pillar of an automobile. More specifically, the center pillar bulk head and the retractor bracket are integrated to reduce the number of parts and weld points. The present invention relates to an improved center pillar bulkhead, and also to an improved side undercarriage coupling structure of a three-door hatchback vehicle using the center pillar bulkhead.

In general, automobiles are classified into notch back cars and hatch back cars according to their types. In addition, hatchback cars are classified into three door type or five door type according to the number of doors. The three door type is a vehicle in which only one door is mounted on the side body panel. Unlike the five-door type, the substructure of the side body panel of the three-door hatchback vehicle must be composed of several panels or pillars to maintain its rigidity. The bottom coupling structure of such a general side body panel is shown in FIG.

According to the coupling structure of the lower part of the side body panel of FIG. 1, that is, the portion A of the drawing, the outer side panel 1, a reinforcement center pillar 2 attached to the outer side panel, and the inner side panel (3), a center filler bulkhead (4), a retractor bracket (5) and a center filler bulkhead body (4) coupled between the center pillar reinforcing member (2) and the inner side panel (3), the inner side panel (3), the retractor bracket 5 and the side floor panel 6 are welded in four layers to each other at one point.

However, this four-ply welding method has been found to significantly reduce the bond strength. It can be seen that this is caused by an increase in the number of parts to be welded, the biggest of which is the center filler bulkhead (5) and the retractor bracket (5) as shown in FIG. This is because they are welded when the body is assembled.

As a result, the center pillar bulkhead 4 and the retractor bracket 5 are separated from each other, thereby increasing the welding point when assembling the body and inevitably welding them together with other components. Can result in poor welding. In addition, the increase in the number of parts will increase the manufacturing cost.

Accordingly, those skilled in the art have been interested in ways to avoid excessive welding thickness and reduce the number of parts.

Therefore, an object of the present invention is to improve the integral center pillar bulk head and its center pillar, which can reduce the number of parts as well as the thickness of the welding point by integrally molding the center pillar bulk head and the retractor bracket, which can be structurally changed. To provide a vehicle side body panel lower coupling structure using.

This object is solved by the present invention, according to one aspect of the present invention, in the integrated center pillar bulkhead welded between the center pillar reinforcing member and the side inner panel when the side body panel lower coupling of the three-door hatchback-type vehicle A center pillar bulkhead body having a base having a protrusion projecting upward for stiffness and two sides extending upward from both sides of the base, and integrally formed upwardly and integrally formed at one side of the two sides; It is characterized by consisting of a bracket structure to which the tractor fixing nut is attached.

According to another aspect of the present invention, in the side body panel lower welding coupling structure of a three-door hatchback type vehicle, between the center pillar reinforcing member inside the outer body panel and the inner body panel attached to the side floor panel, base and 2 An integrated bulkhead center pillar composed of a main body having two side portions and a bracket portion integrally formed on the main body is welded, one side of the two sides being a center pillar reinforcing member, and the other side being the inner body panel and the side floor panel; It is characterized in that the three-ply welded.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows the center filler bulkhead according to the present invention in detail, the center filler bulkhead is a unitary center filler bulkhead similar to the one-piece molding of the conventional separately molded center filler bulkhead and the retractor bracket. (10). The center filler bulkhead 10 is hereinafter referred to for clarity.

The center pillar bulkhead 10 includes a center pillar bulkhead body 11 and a bracket portion 12. The center pillar bulkhead body 11 includes a base 13 and two sides 14, 14 ′ with protrusions 15 formed for rigidity.

In particular, the center pillar bulkhead body 11 is provided with a bracket portion 12 integrally. More specifically, the lower portion of the bracket portion 12 is integrally molded in place in the side portion 14 of the center pillar bulkhead body 11.

A nut 16 for bolting a retractor (not shown) is welded to one side of the center portion of the bracket portion 12.

4 is a detailed cross-sectional view of the side body lower coupling structure to which the center pillar bulkhead 10 is applied according to the present invention, and both side portions 14 and 14 'of the center pillar bulkhead 10 have brackets ( 2) and the inner side panel 3. That is, one side portion 14 is welded to the top of the inner side panel 3, and one side portion 14 'is in place in the center pillar reinforcing member 2, respectively. In particular, one side portion 14 of the center pillar bulkhead 10 is welded in three layers together with the inner side panel 3 and the side floor panel 6. More specifically, the upper part of the inner side panel 3 and the upper part of the side floor panel 6 and the one side portion 14 of the center pillar bulkhead 10 are welded in three layers.

Of course, the inner side panel 3 and the side floor panel 6 may be spot welded in three layers while being edge welded in advance.

As a result, according to the combined structure of the center pillar bulkhead and the side body lower panel using the center pillar bulkhead according to the present invention, the number of parts is integrated by integrating the center pillar bulkhead and the retractor bracket which are conventionally formed separately. The center filler bulkhead can be omitted and the number of welding points can be omitted, thus increasing productivity and significantly reducing the welding thickness. Can improve the weldability as well as avoid welding defects. However, in spite of such a simple structure, since the strong weld bond strength is provided as described above, the strength against collision and impact is excellent, and stability is increased.

While a preferred embodiment according to the present invention has been described above, it will be understood by those skilled in the art that various modifications and modifications can be made without departing from the scope of the appended claims.

Claims (2)

In an integrated center pillar bulk head welded between the center pillar reinforcing member and the side inner side panel when the side body panel lower coupling of a three-door hatchback type vehicle, the protrusion 15 protrudes upward for rigidity. A center pillar bulkhead body 11 having a base 13 having two base portions and two side portions 14 and 14 'extending upwardly from both sides of the base portion, and one of the two side portions 14 and 14'. An integral center pillar bulkhead (10), characterized in that it is formed integrally with the bracket and extends upward and comprises a bracket portion (12) to which a retractor fixing nut is attached. In the coupling structure under the center pillar of the automobile, the base 13 and between the center pillar reinforcing member 2 inside the outer side panel 1 and the inner side panel 3 attached to the side floor panel 6. An integral center pillar bulkhead 10 consisting of a body 11 having two sides 14 and 14 'and a bracket portion 12 integrally molded to the body 11 is welded, and the two sides ( 14, 14 'of the side 14' is welded to the center pillar reinforcing member (2), the other side 14 is welded three times with the inner body panel 3 and the side floor panel (6) The coupling structure of the lower center pillar of the vehicle.