JP7460498B2 - Body frame reinforcement structure - Google Patents

Description

The present invention relates to a reinforcing structure for a vehicle body frame member in which a reinforcing panel is fixed to a main panel in an overlapping manner.

As a reinforcement structure for this type of car body frame material, the center pillar of the car body that extends in the vertical direction is constructed by an outer panel and an inner panel as main panels forming a closed cross section, and a reinforcement panel as a reinforcing panel arranged within the closed cross section. A configuration is known (for example, see Patent Document 1). In Patent Document 1, the outer panel includes an outer wall portion extending front and back in a horizontal cross section, a pair of vertical wall portions extending inward in the vehicle width direction from the front and rear of the outer wall portion, and a front and rear wall portion extending from each inner end side of the vertical wall portion. and a peripheral flange portion extending in the direction, and has a substantially hat-shaped horizontal cross section. In addition, the reinforcement includes a central wall part provided along the outer wall part of the outer panel, a vertical wall part provided before and after the central wall part and provided along the vertical wall part of the outer panel, and a vertical wall part of the reinforcement. and a plurality of flange pieces extending outward in the longitudinal direction from the inside side of the vehicle. The flange pieces are arranged vertically at arbitrary intervals and are fixed to the peripheral flange portion of the outer panel with rivets.

Furthermore, arc-shaped notches are formed in the vertical wall portions between the flange pieces of the reinforcement, respectively. The arcuate shape of the notch is configured to smoothly connect with the side edge line of the flange piece so that the amount of bending does not change abruptly. In addition, in the center wall of the reinforcement, there are female threaded parts at fixed intervals in the vertical direction, in which the fastening screws of the hinge members as vehicle body functional parts are screwed into the parts that contact the outer wall of the outer panel. is formed. Patent Document 1 states that when the outer panel is bent and deformed due to input from the side of the vehicle, the tensile stress generated in the reinforcement is dispersed along the notch and is difficult to concentrate.

Japanese Patent Application Publication No. 2004-306896

However, in the reinforcement structure described in Patent Document 1, the notch in the vertical wall of the reinforcement has an arc shape with a relatively low height so that the amount of bending does not change suddenly. It is not possible to deform relatively significantly near the notch. As a result, it was not possible to sufficiently reduce the inputs in the shearing direction and the peeling direction that occur at the fixed locations of each panel during bending deformation, and there was a risk that the strength would decrease due to the reinforcing panel peeling off from the main panel.

The present invention was made in consideration of the above circumstances, and its purpose is to provide a reinforcement structure for a vehicle body frame that can prevent the reinforcing panel from peeling off from the main panel when the vehicle body frame is bent.

In order to achieve the above object, the present invention provides a reinforcing structure for a vehicle body frame member including a main panel extending in a predetermined direction and a reinforcing panel fixed to overlap with the main panel, the main panel comprising: , in the cross section in the extending direction, a central wall portion extending in the width direction, a pair of left and right flanges formed on the outside in the width direction of the central wall portion at intervals in the thickness direction, and a widthwise direction of the central wall portion. a pair of left and right vertical walls connecting an outer end and an inner end in the width direction of each of the flange parts; , a flange reinforcing part fixed to one of the flange parts, and a connecting part connecting an outer end in the width direction of the center reinforcing part and an inner end in the width direction of the flange reinforcing part, A notch extending from the flange reinforcing portion to at least the connecting portion is formed in the reinforcing panel, and the outer edge of the notch extends in the extending direction of the flange portion and the notch of the flange reinforcing portion in plan view. A first adjacent fixed point adjacent to one side, and a second adjacent fixed point adjacent to the other side in the extending direction with respect to a first adjacent fixed point that is closest to the first adjacent fixed point among the fixed points of the central wall part and the central reinforcement part. A reinforcing structure for a vehicle body frame member is provided, which has a first reference fixing location and a first straight portion formed substantially parallel to a first imaginary line passing through the first reference fixing location.

According to this reinforcing structure of the car body frame, when a bending load in the extending direction is applied to the car body frame during a vehicle collision, the main panel and the reinforcement panel are relatively displaced, and the fixed points of each panel are Inputs in the shear direction and peel direction occur. At this time, since the reinforcing panel is formed with a notch that reaches the connecting portion, it is possible to deform the reinforcing panel near the notch of the connecting portion. Here, since the notch has the first straight portion formed substantially parallel to the first imaginary line in plan view, the notch can be formed relatively large in one direction of extension. . This reduces the input in the shearing direction and peeling direction between the main panel and the reinforcing panel at the first adjacent fixing point and the first reference fixing point, and suppresses a decrease in strength due to the reinforcing panel peeling off from the main panel. can. In addition, stress is not concentrated at a specific point in the first straight section due to the load acting between the first adjacent fixing point and the first reference fixing point, and the shape of the notch is maintained accurately when the reinforcing panel is deformed. can do.

In the reinforcing structure for a vehicle body frame member, the outer edge of the cutout portion is connected to a second adjacent fixing point adjacent to the flange portion and the second adjacent fixing portion of the flange reinforcing portion in the other extending direction of the cutout portion in a plan view, and to the center A second reference fixed point adjacent to the second adjacent fixed point closest to the second adjacent fixed point among the fixed points of the wall part and the central reinforcing part in one direction, and a second virtual line passing through the second reference fixed point; The second linear portion may be formed substantially parallel to each other.

According to this reinforcing structure for a vehicle body frame member, the notch has the second straight portion formed substantially parallel to the second imaginary line in plan view, so that the notch can be moved in the other direction in the extending direction. It can be formed relatively large. In addition, stress is not concentrated at a specific point in the second straight section due to the load acting between the second adjacent fixed point and the second standard fixed point, and the shape of the notch is maintained accurately when the reinforcing panel is deformed. can do.

In the above-mentioned reinforcement structure of the vehicle body frame material, the first reference fixing point adjacent to the first adjacent fixing point on the other side of the extension direction may be the second adjacent fixing point closest to the second adjacent fixing point, and the second reference fixing point adjacent to the second adjacent fixing point on one side of the extension direction may be the first adjacent fixing point closest to the first adjacent fixing point.

This reinforcement structure for the vehicle body frame allows the cutouts to be made relatively large relative to the first and second adjacent fixing points on either side of the cutout in the extension direction, and the first and second adjacent fixing points of the central reinforcement part adjacent to these.

In the reinforcement structure for a vehicle body frame member, the first linear portion of the notch is formed on the first imaginary line or on the outer side in the width direction of the first imaginary line in plan view; The second linear portion may be formed on the second imaginary line or outside the second imaginary line in the width direction in plan view.

According to this reinforcing structure of the vehicle body frame material, sufficient tensile strength of the reinforcing panel between the first adjacent fixing point and the first reference fixing point adjacent to one side in the extending direction of the notch is ensured, and It is possible to sufficiently ensure the tensile strength of the reinforcing panel between the second adjacent fixing location and the second reference fixing location that are adjacent to each other in the other direction.

In the above-mentioned reinforcement structure for the vehicle body frame, the cutout portion may straddle the ridge formed by the central wall portion and one of the flange portions of the main panel in a plan view.

According to this reinforcing structure of the car body frame member, the notch is formed across the ridgeline of the main panel, so when the car body frame member is deformed, the relative movement between the flange part of the main panel and the center wall part is prevented. , the flange reinforcement portion and center reinforcement portion of the reinforcement panel can be effectively made to follow each other.

The reinforcement structure of the vehicle body frame material of the present invention can prevent the reinforcing panel from peeling off from the main panel when the vehicle body frame material is bent.

1 is a schematic cross-sectional view of a vehicle body frame material showing one embodiment of the present invention. 2 is a sectional view taken along line AA in FIG. 1. FIG.

1 and 2 show one embodiment of the present invention; FIG. 1 is a schematic sectional view of a vehicle body frame member, and FIG. 2 is a sectional view taken along line AA in FIG.

As shown in FIG. 1, the vehicle body frame member 1 includes an inner panel 10 extending in a predetermined direction, an outer panel 20 forming a closed cross section together with the inner panel 10, and a reinforcement panel 30 disposed within the closed cross section. configured. The inner panel 10, the outer panel 20, and the reinforcement panel 30 are made of metal such as steel. In this embodiment, the vehicle body frame member 1 is used for a pillar portion of a vehicle body. The inner panel 10 and the outer panel 20 are formed into a substantially hat shape in a cross section in the extending direction, and here, the extending direction of the hat-shaped end portion (the left-right direction in FIG. 1) is the width direction, and the bulge direction of the center of the hat shape. (The vertical direction in FIG. 1) will be explained as the thickness direction.

Inner panel 10 as a main panel, in an extension direction cross section, includes a central wall portion 11 extending in the width direction, and a pair of left and right flange portions formed on the outside of the central wall portion 11 in the width direction at intervals in the thickness direction. 12, and a pair of left and right vertical wall portions 13 connecting the widthwise outer end of the center wall portion 11 and the widthwise inner end of each flange portion 12. In this embodiment, each vertical wall portion 13 is formed so as to be inclined outward in the width direction from the center wall portion 11 toward the flange portion 12.

The outer panel 20 has, in a cross section in the extension direction, a central wall portion 21 extending in the width direction, a pair of left and right flange portions 22 formed on the widthwise outer side of the central wall portion 21 at a distance in the thickness direction, and a pair of left and right vertical wall portions 23 connecting the widthwise outer end portion of the central wall portion 21 and the widthwise inner end portion of each flange portion 22. The inner panel 10 and the outer panel 20 are joined by spot welding at each flange portion 12, 22. Each vertical wall portion 23 of the outer panel 20 is formed to be inclined outward in the width direction from the central wall portion 21 toward the flange portion 22, similar to the inner panel 10.

The reinforcement panel 30 as a reinforcement panel has a central reinforcement part 31 fixed to the center wall part 11 of the inner panel 10 and a pair of left and right flanges fixed to each flange part 12 of the inner panel 10 in an extending direction cross section. It has a reinforcing part 32 and a pair of left and right connecting parts 33 that connect the outer end in the width direction of the central reinforcing part 31 and the inner end in the width direction of each flange reinforcing part 32. In this embodiment, the reinforcement panel 30 is joined by spot welding at the central reinforcement section 31 and each flange reinforcement section 32.

As shown in Figure 2, the reinforcement panel 30 has a cutout 34 formed from one flange reinforcing portion 32 to one connection portion 33. Figure 2 is a cross-sectional view taken along line A-A in Figure 1, and is a plan view of the reinforcement panel 30 as viewed from a direction perpendicular to each flange reinforcing portion 32. In this embodiment, the cutout 34 is formed so as to straddle the ridge 14 formed by the central wall portion 11 of the inner panel 10 and one flange portion 12 in a plan view. The outer edge of the notch 34 has, in a plan view, a first end parallel outer edge 34a extending inward in the width direction from the end of the flange reinforcement 32, a first end inclined outer edge 34b extending from the first end parallel outer edge 34a toward the outside in the width direction at an incline in the other direction, an other end inclined outer edge 34c extending from the first end inclined outer edge 34b toward the outside in the width direction at an incline in the other direction, and an other end parallel outer edge 34d extending outward in the width direction from the outer end of the other end inclined outer edge 34c. In this embodiment, the first end parallel outer edge 34a and the other end parallel outer edge 34d are formed in the flange reinforcement 32, and the first end inclined outer edge 34b and the other end inclined outer edge 34c are formed from the flange reinforcement 32 to the connection 33.

As shown in FIG. 2, the inner panel 10 and the reinforcement panel 30 have a plurality of fixing locations 40 by spot welding. In FIG. 2, each fixing location 40 is schematically shown by a figure with an "X" written inside an "O". The one end side inclined outer edge 34b of the notch 34 is connected to the first adjacent fixing portion 41 adjacent to the flange 12 and the first adjacent fixing portion 41 in one direction in which the notch 34 of the flange reinforcing portion 32 extends, and the center wall 11 and the flange reinforcing portion 32 in plan view. A first imaginary line P1 passing through a first reference fixing spot 43 adjacent to the first proximate fixing spot 42 closest to the first adjacent fixing spot 41 among the fixing spots 40 of the central reinforcing part 31 on the other side in the extending direction; It is formed almost parallel to. In this embodiment, the one end side inclined outer edge portion 34b is formed on the first imaginary line P1. In addition, in the present embodiment, the second adjacent fixing location 44 adjacent to the other extending direction of the notch 34 of the flange portion 12 and the flange reinforcing portion 32 is fixed to the fixing location 40 of the central wall portion 11 and the central reinforcing portion 31. The second adjacent fixed point closest to the second adjacent fixed point 44 is the first reference fixed point 43, and the second reference fixed point adjacent to the second adjacent fixed point in the other direction in the extension direction is the first nearby fixed point. This is point 42. The other end side inclined outer edge portion 34c is substantially parallel to the second virtual line P2 passing through the second adjacent fixing location 44 and the first proximate fixing location 42 as the second reference fixing location in plan view. It is formed. In this embodiment, the other end side inclined outer edge portion 34c is formed on the second imaginary line P2. Moreover, the fixing location 50 of the inner panel 10 and the outer panel 20 by spot welding overlaps with the notch 34 in plan view.

According to the reinforcement structure of the vehicle body frame material 1 configured as described above, when a bending load in the extension direction is applied to the vehicle body frame material 1 during a vehicle collision, the inner panel 10 and the reinforcement panel 30 are displaced relative to each other, and input in the shear direction and peeling direction occurs at the fixing points 40 of each panel. At this time, since the reinforcement panel 30 has a cutout 34 formed that reaches the connection part 33, it is possible for the reinforcement panel 30 to deform near the cutout 34 of the connection part 33.

Here, the notch 34 has one end side inclined outer edge 34b formed substantially parallel to the first imaginary line P1 in plan view, so that the notch 34 is relatively large in one direction of extension. can be formed. Moreover, since the notch portion 34 has the other end side inclined outer edge portion 34c formed substantially parallel to the second imaginary line P2 in plan view, the notch portion 34 is relatively large in the other extending direction. can be formed. As a result, shearing between the inner panel 10 and the reinforcement panel 30 at the first adjacent fixed point 41 and the first reference fixed point 43, as well as the second adjacent fixed point 44 and the first adjacent fixed point 42 as the second reference fixed point By reducing the input in the direction and the peeling direction, it is possible to suppress a decrease in strength due to peeling of the reinforcement panel 30 from the inner panel 10.

Moreover, since the one end side inclined outer edge part 34b is formed substantially parallel to the first imaginary line P1, the one end side inclined outer edge part Stress is not concentrated on a specific location of 34b. Further, since the other end side inclined outer edge portion 34c is formed substantially parallel to the second imaginary line P2, it acts between the second adjacent fixing location 44 and the first proximate fixing location 42 as the second reference fixing location. The stress will not be concentrated at a specific location on the other end side inclined outer edge portion 34c due to the load. Therefore, the shape of the notch 34 can be maintained accurately when the reinforcement panel 30 is deformed.

Furthermore, since the cutout portion 34 is formed across the ridge line 14 of the inner panel 10, the flange reinforcing portion 32 and the central reinforcing portion 31 of the reinforcement panel 30 can effectively follow the relative movement of the flange portion 12 and the central wall portion 11 of the inner panel 10 when the vehicle body frame material 1 is deformed.

In the above embodiment, the vehicle body frame member 1 of the present invention is used in a pillar portion extending substantially vertically, but the present invention is not limited to this, and for example, the vehicle body frame member 1 of the present invention is applied to a floor side or It can be used as appropriate for various frame parts extending substantially front to back or substantially left and right on the roof side. Further, in the embodiment, the reinforcement panel 30 as a reinforcing panel is fixed to be overlapped with the inner panel 10, but it may be fixed to be overlapped with the outer panel 20, and further, The present invention is not limited to a vehicle body frame member having a closed cross section, and may be any material in which a reinforcing panel is fixed to a substantially hat-shaped main panel in an overlapping manner.

Furthermore, in the embodiment described above, the inner panel 10 and the reinforcement panel 30 are all fixed by spot welding, but each panel may be fixed in any manner. For example, each panel may be fixed by other welding methods, or may be fixed by fastening means such as rivets or adhesive.

In the above embodiment, the cutout 34 straddles the ridge 14 of the inner panel 10, but does not necessarily have to straddle the ridge 14. In addition, the cutout 34 has an outer edge that has both a first straight portion substantially parallel to the first virtual line P1 and a second straight portion substantially parallel to the second virtual line P2, but may have only one of them, and the shape of the cutout 34 can be changed as desired. However, from the viewpoint of ensuring sufficient tensile strength of the reinforcing panel between each fixing point, it is preferable that the first straight portion of the outer edge of the cutout is formed on the first virtual line or on the widthwise outer side of the first virtual line, and the second straight portion is formed on the second virtual line or on the widthwise outer side of the second virtual line.

Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the embodiments described above. It should be noted that not all of the combinations of features described in the embodiments are necessarily essential to the means for solving the problems of the invention.

1 Vehicle body frame member 10 Inner panel 11 Central wall portion 12 Flange portion 13 Vertical wall portion 14 Ridge line 30 Reinforcement panel 31 Central reinforcement portion 32 Flange reinforcement portion 33 Connection portion 34 Notch portion 34b One end side inclined outer edge portion 34c Other end side inclined outer edge Part 40 Fixed point 41 First adjacent fixed point 42 First adjacent fixed point (second standard fixed point)
43 First standard fixing point (second adjacent fixing point)
44 Second adjacent fixed point 50 Fixed point P1 First virtual line P2 Second virtual line

Claims (5)

A reinforcement structure for a vehicle body frame material, comprising: a main panel extending in a predetermined direction; and a reinforcement panel overlapping and fixed to the main panel,
The main panel has, in a cross section in the extension direction, a central wall portion extending in the width direction, a pair of left and right flange portions formed at an interval in the thickness direction on the widthwise outer sides of the central wall portion, and a pair of left and right vertical wall portions connecting the widthwise outer ends of the central wall portion and the widthwise inner ends of each of the flange portions,
The reinforcing panel has, in a cross section in the extension direction, a central reinforcing portion fixed to the central wall portion, a flange reinforcing portion fixed to one of the flange portions, and a connecting portion connecting a widthwise outer end portion of the central reinforcing portion and a widthwise inner end portion of the flange reinforcing portion,
The reinforcing panel is provided with a notch extending from the flange reinforcing portion to at least the connection portion,
A reinforcement structure for a vehicle body framework material, in which the outer edge of the cutout has a first straight portion that is formed approximately parallel to a first virtual line that passes through a first adjacent fixing point adjacent to one side in the extension direction of the cutout of the flange portion and the flange reinforcement portion, and a first reference fixing point adjacent to the other side in the extension direction of a first proximate fixing point among the fixing points of the central wall portion and the central reinforcement portion that is closest to the first adjacent fixing point. The reinforcement structure of the vehicle body frame material according to claim 1, wherein the outer edge of the cutout has a second straight portion formed substantially parallel to a second imaginary line passing through a second adjacent fixing point adjacent to the other of the extension directions of the cutout of the flange portion and the flange reinforcement portion in a plan view, and a second reference fixing point adjacent to one of the extension directions of the second adjacent fixing point, which is the closest of the fixing points of the central wall portion and the central reinforcement portion to the second adjacent fixing point. the first reference fixing point adjacent to the first proximate fixing point in the other extension direction is a second proximate fixing point closest to the second adjacent fixing point,
3. The reinforcement structure for a vehicle body frame material according to claim 2, wherein the second reference fixing point adjacent to the second adjacent fixing point on one side in the extension direction is a first adjacent fixing point closest to the first adjacent fixing point. The first linear portion of the notch is formed on the first imaginary line or on the outer side in the width direction of the first imaginary line in plan view,
The reinforcing structure for a vehicle body frame member according to claim 3, wherein the second linear portion of the notch is formed on the second imaginary line or on the widthwise outer side of the second imaginary line in plan view. 5. The reinforcement structure for a vehicle body frame material according to claim 1, wherein the cutout portion straddles a ridge line formed by the central wall portion and the one flange portion of the main panel in a plan view.

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