JPH0752788Y2 - Car front pillar stiffening structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a front pillar stiffening structure for an automobile.

(Prior Art) Conventionally, the structure of the front pillar of an automobile is
As shown in Fig. 15, the front pillar inner a and the front pillar outer b are welded at their end edges by spot welding or the like to form a front pillar c with a closed cross section, and steering support between the left and right front pillars c. As shown in FIG. 16, the upper end of the front pillar is connected to the side rail e and the lower end is connected to the side sill f, respectively, and the respective connecting portions are connected to the phosphorus upper g and the phosphorus upper g. Each is stiffened by the hose ment lower h. See also Kimiko Sho 61-4
As described in Japanese Patent No. 4543, there is one in which the outer pillar, the inner pillar, and the reinforcement are used to form first and second box-shaped spaces, and the middle portion of the outer pillar is reinforced by the inner pillar and the reinforcement.

(Problems to be Solved by the Invention) According to the above-described conventional structure, the upper end and the lower end of the front pillar are reinforced by the independent reinforcement upper and the reinforcement lower, and are connected to the side rail and the side sill. . However, this structure
Since only the upper and lower ends of the front pillar are reinforced, the rigidity of the entire front pillar is weak and it is not sufficient to secure the torsional rigidity of the entire vehicle body. In addition, since the end of the steering support beam is attached to the front pillar inner, the front pillar absorbs the load from the steering support beam attachment with a large deformation during a frontal collision, and the steering support beam is supported by the steering support beam. There is a risk that the steering wheel may move backwards and injure the driver. Therefore, improvement of safety is desired. Further, as the vehicle travels at high speeds and on rough roads, vibrations of the vehicle body and steering wheel are induced, and maneuverability and riding comfort are not favorable either. In Japanese Utility Model Publication No. 61-44543, although the inner pillar is made smaller and lighter and the cost is reduced, it is not sufficient to secure the rigidity of the entire front pillar. In order to compensate for these, measures such as thickening the plate material of the component must be taken, which goes against the general tendency toward weight reduction.

Therefore, an object of the present invention is to strengthen the coupling force between the front pillar and the mounting portion of the front support pillar and the steering support beam to secure the torsional rigidity of the entire vehicle body by using a component made of a relatively thin plate material. To provide a structure that suppresses the vibrations that occur, secures a living space by sufficiently receiving the load that enters the front pillar from the steering support beam in the event of a frontal collision, and improves safety, maneuverability, and riding comfort. is there.

(Means for Solving the Problems) A front pillar stiffening structure for an automobile of the present invention that achieves the above-mentioned object includes a front pillar outer that forms a front pillar having a closed cross-section in cooperation with a front pillar inner, and a front pillar outer structure. In a front pillar of an automobile, which has a phosphorus hosement that overlaps with a front pillar outer and forms a closed cross section in cooperation with the front pillar inner, and a steering support that is coupled to the front pillar inner, the phosphorus hosement is a The lower end of the reinforcement upper and the upper end of the reinforcement lower are superposed and connected, and the front pillar formed on either the front side or the rear side of the lower end of the reinforcement upper is horizontally crossed. And the protrusion that overlaps the front pillar inner and the reinforcement lower. The bulging portion formed at a portion corresponding to the projecting portion at the upper end of the above, the front pillar inner and the steering support beam are integrally superposed and coupled.

(Function) The inside of the front pillar, which has a closed cross-section formed by the front pillar outer and the front pillar inner, is stiffened by the phosphorus hose formed by the phosphorus hose upper and the phosphorus hose lower continuously from the upper end to the lower end of the front pillar. In addition, the steering support beam is fixed to the front pillar that is rigidly stiffened by dividing the front pillar in multiple stages in the vertical direction by the protrusion formed on the reinforcement upper and the bulging portion formed on the reinforcement lower. This suppresses vibrations and twisting of the vehicle body during traveling, prevents the steering wheel from entering the passenger compartment in the event of a collision, and avoids injury to the driver, thereby improving safety.

(Embodiment) An embodiment of a vehicle front pillar stiffening structure of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a front pillar stiffening structure of the present invention, and FIG. 2 is a front pillar inner upper 2
End portions of the front pillar inner 1 and the steering support beam 8 which are formed by connecting the front pillar inner lower 3 and the front pillar inner lower 3, and FIG.
FIG. 8 is a perspective view showing the phosphorus support lower 7, and FIG. 8 is a perspective view showing the front pillar outer 4.

FIG. 9 is an enlarged view of a portion A of the side view of the vehicle body shown in FIG. 14, and a cross-sectional view taken along the lines AA, BB, CC and DD of FIG. 9. As shown in FIGS. 10, 11, 12, and 13, which is a perspective view of a main part, both side edges of the front pillar inner 1 and the front pillar outer 4 are joined and closed. A front pillar having a sectional shape is formed, and the front pillar is continuously stiffened by the reinforcement 5 from the upper end to the lower end. Front pillar inner 1
3 is a sectional view taken along the line EE of FIG. 2 and FIG.
As shown in the figure, a substantially flat plate-shaped front pillar inner lower 3
The upper end edge of the front pillar inner upper 2 and the lower end edge of the front pillar inner upper 2 having a substantially flat plate-like lower end and forming a substantially U-shape as the lower end moves to the upper end.
At the lower end edge of the front pillar and the upper edge of the front pillar inner lower 3, holes 2a, 3a for bolting the ends of the steering support beam 8 for supporting the steering wheel across the left and right front pillars are formed. .

As shown in FIG. 8, the front pillar outer 4 has a substantially U-shaped cross section so as to form a closed cross section in cooperation with the front pillar inner 1, and the lower end is curvedly formed rearward of the vehicle body so as to be continuously connected to the side sill 9. ing.

On the other hand, the reinforcement 5 is a lower end edge of the reinforcement upper 6 shown in FIG. 4 which is a sectional view taken along the line FF in FIG. 4 and a cross section taken along the line GG in FIG. The upper end edge of the reinforcement lower 7 shown in FIG. 7 is overlapped and connected. The reinforcement upper 6 is bent into a substantially U-shaped cross section so as to fit along the inner surface of the upper portion 4a of the front pillar outer 4 having a substantially U-shaped cross section, and is formed by the front pillar inner 1 and the front pillar outer 4. A closed cross section that is formed and communicates in the vertical direction is maintained. In addition, when the front pillar is assembled on the rear side of the vehicle body at the lower end of the reinforcement upper 6, the front pillar inner upper 2 and the front pillar inner lower 2 are laid across the closed cross section of the front pillar as shown in FIG. A protrusion 6b is formed so as to overlap the inner surface of the front pillar inner 1 made of three. The protrusion 6b is provided with a hole 6a for bolting the steering support beam 8. On the other hand, the phosphorus reinforcement lower 7 is the front pillar inner 1
The front pillar outer 4 has a substantially U-shaped cross section so that the front pillar outer 4 can be fitted along the inner surface of the front pillar outer 4 while maintaining a closed cross section that communicates in the vertical direction. Curved along the shape. Further, when the front pillar is assembled on the rear side of the vehicle body at the upper end of the reinforcement bottom 7, the top portion 7b is superposed on the portion corresponding to the protrusion 2b formed on the lower end of the reinforcement upper 6 as shown in FIG. A bulging portion 7c is provided so as to be capable of extending horizontally within the closed cross section of the front pillar. The upper and lower ends of the bulging portion 7c are joined to the front pillar outer 4 by spot welding, and the top portion 7b has a protruding portion 6b.
Similarly to the above, a hole 7a for bolting the steering support beam 8 is provided.

In assembling the front pillar portion formed in this way, the inner surface of the front pillar outer 4 is overlaid with the reinforcement 5 formed by previously connecting the phosphorus upper 6 and the lower lower 7, and integrally joined by spot welding. To do. Next, both side edges 4d of the front pillar outer 4 and both side edges 2d, 3d of the front pillar inner upper 2 and the front pillar inner lower 3 are integrally joined by spot welding to form a front pillar. Next, holes 2a, 3a, 6a, 7a provided in the front pillar inner 1 and the reinforcement 5
By connecting the ends of the steering support beam 8 with bolts 8a, the steering support beam 8 is laid horizontally between the left and right front pillars.

In addition, a bolt for mounting the steering support beam 8
It is desirable to weld the nut for screwing 8a to the reinforcement hose 7 in advance in order to improve work efficiency.

In the above description, the protrusion formed on the lower end of the reinforcement and the bulge formed on the upper end of the reinforcement are provided on the rear side of the body of the reinforcement, but on the front side of the reinforcement. It is also possible to provide.

In the stiffening structure of the front pillar configured as described above, a closed cross section from the upper end to the lower end of the front pillar is formed by the front pillar inner 1 and the phosphorus hose 5, and the phosphorus hose is used for the sunroof along the closed cross section. By using the guide portion when inserting the drain hose 10, the work of inserting the drain hose 10 can be facilitated.

(Effect) According to the present invention, the front pillar inner and the rear reinforcement form a closed cross section that is continuous from the upper end to the lower end of the front pillar, and further, the front pillar is closed at the joint with the steering support beam of the front pillar. By restraining the cross-sectional deformation of the front pillar by the bulging portion and the protrusion formed by crossing the cross section, it is stiffened between the upper and lower ends of the front pillar, and the steering support beam and the front pillar are connected. The strength of the vehicle is increased, the torsional rigidity of the vehicle body is secured, the vibration is reduced, and the maneuverability and the riding comfort are improved. At that time, it is possible to reduce the cost while maintaining the strength and the weight without adding the component parts. In addition, in the event of a frontal collision, the load input from the steering support beam is reliably received and the backward movement of the steering wheel supported by the steering support is prevented, thereby protecting the driver and improving safety.

[Brief description of drawings]

FIG. 1 is a perspective view showing an essential part of an embodiment of the present invention, FIG. 2 is a perspective view of the front pillar and a steering support beam, and FIG. 3 is a sectional view taken along the line EE of FIG. Fourth
FIG. 5 is a perspective view of the reinforcement upper, FIG. 5 is a cross-sectional view taken along the line FF of FIG. 4, FIG. 6 is a perspective view of the reinforcement lower, and FIG. 7 is a line GG of FIG. Cross section along
8 is a perspective view of the front pillar outer, FIG. 9 is a side view of the front pillar, FIG. 10, FIG. 11, FIG. 12 and FIG.
The figures are respectively AA line, BB line, CC in FIG.
14 is a side view of an automobile showing a site to which the present invention is applied, and FIGS. 15 and 16 are explanatory views of a conventional example. 1 …… Front pillar inner, 2 …… Front pillar inner upper, 3 …… Front pillar inner lower, 4 ……
Front pillar outer, 5 ... Rinhosement, 6 ...
… Rinhosement upper, 6b …… Projection part, 7 …… Rinhosement lower, 7b …… Swelling part, 8 …… Steering support beam, 10 …… Drain hose for sunroof.

Claims (3)

[Scope of utility model registration request] 1. A front pillar outer for forming a front pillar having a closed cross-section in cooperation with a front pillar inner,
In a front pillar of an automobile having a reinforcement provided in the front pillar and overlapping the front pillar outer, forming a closed cross section in cooperation with the front pillar inner, and a steering support beam coupled to the front pillar inner, A reinforcement is constructed by superimposing and connecting the lower end of the upper reinforcement and the upper end of the lower reinforcement, and the front pillars formed on either the front side or the rear side of the lower end of the reinforcement upper are closed. A protrusion that is horizontally crossed in the cross section and overlaps with the front pillar inner, and a bulge formed at a portion corresponding to the protrusion on the upper end of the reinforcement lower,
A front pillar stiffening structure for an automobile, characterized in that the front pillar inner and the steering support beam are integrally and integrally connected. 2. A front pillar inner is configured by connecting a lower end of the front pillar inner upper and an upper end of the front pillar inner lower to a lower end of the front pillar inner upper, the upper end of the front pillar inner lower, and a phosphorus reinforcement upper. The front pillar stiffening structure for an automobile according to claim 1, wherein the formed projection, the bulging portion formed on the reinforcement lower, and the steering support beam are integrally and superposedly coupled. 3. The front pillar stiffening structure for an automobile according to claim 1 or 2, wherein a sunroof drain hose is inserted into a closed cross section formed by the cooperation of the front pillar inner and the phosphorus hosement.