JP2008155776A - Vehicle body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body structure connecting a side member 5 and a dash panel 3 in a reinforced manner in a relaxed state of peeling force applied to a joint portion by an input from a vehicle body side. <P>SOLUTION: A front and rear surface 11a of a reinforcement 11 is jointed to a front and rear surface 8a of a brace 8 by welding. An end face 11b of the reinforcement 11 is overlapped and joined with an end face 8b of the brace 8 by welding. An extension plate part 11c extended to a front surface 3a side of the dash panel 3 is joined to the front surface 3a of the dash panel 3 by welding. The brace 8 and the dash panel 3 are made a connected state via the reinforcement 11. Stress concentration to a joining part of the front surface 3a of the dash panel 3 is relaxed in relation to the input from the side member 5 side to the brace 8, and the peeling force applied to the joining part with the front surface 3a is relaxed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle body structure in which a side member and a dash panel are connected to a front portion of a vehicle compartment.

  A pair of side members constituting the skeleton of the vehicle are arranged extending in the front-rear direction of the vehicle. A vehicle compartment and a region in front of the vehicle compartment (in the case of a front engine vehicle, an engine room: hereinafter referred to as an engine room) are partitioned by a dash panel, and the side member and the dash panel are joined. Further, the engine room is provided with a strut house that supports the suspension member, and the engine room structure provided with the strut house and the like is supported by a pair of side members.

  The vibration input from the strut house is transmitted to the side member, and the input from the strut house is transmitted to the connecting portion between the side member and the dash panel. For this reason, it is necessary to ensure the rigidity of the joint part of a side member and a dash panel, and conventionally, the joint part of a side member and a dash panel is joined by the brace, and the joint part is reinforced (for example, patent documents) 1, see Patent Document 2).

Japanese Patent No. 2605458 JP 2001-171556 A

  In the conventional vehicle structure, a brace is welded and joined to a joint portion between the side member and the dash panel to reinforce the input from the strut house. However, the joint between the brace, the side member, and the dash panel is a joint on the vertical wall, and the torsional force is applied by the input from the strut house, and the peeling force is applied to the welded portion. For this reason, the present condition is that further reinforcement, such as increasing the thickness of a dash panel or a brace, is needed, and this leads to an increase in cost and an increase in weight.

  The present invention has been made in view of the above situation, and without increasing the thickness of the dash panel or brace, the side member and the dash panel are reduced in a state where the peeling force acting on the joint portion is relaxed by the input from the vehicle body. An object of the present invention is to provide a vehicle body structure that is reinforced and coupled.

  In order to achieve the above object, a vehicle body structure of the present invention according to claim 1 is a dash that partitions a side member of a portion extending to a front portion of a vehicle compartment and a region in front of the vehicle compartment and the vehicle compartment. A panel, a side member reinforcing plate along the inner surface of the side member in the vehicle width direction, and a dash panel reinforcing plate along the front of the dash panel. A brace having the brace, and the side member reinforcing plate portion of the brace and the dash panel reinforcing plate portion are connected to each other, and further extend inward in the vehicle width direction from the dash panel reinforcing plate portion and on the front surface of the dash panel. And a phosphorus hose having an extending plate portion along, and joining the side member reinforcing plate portion of the brace to the side member, The Sshupaneru reinforcing plate portion is joined to the the reinforcement, the extension plate portion of the the reinforcement by bonding to the front surface of the dash panel, characterized in that it is coupled to the side members and the dash panel.

  In the present invention according to claim 1, the force input to the side member is distributed to the phosphorus hose, and stress does not concentrate at the joint portion with the dash panel. For this reason, the peeling force acting on the joint by the input from the vehicle body is alleviated without increasing the thickness of the dash panel or brace or increasing the size of the brace to increase the joint with the dash panel. In this state, the side member and the dash panel are reinforced and joined.

  The structure in which the phosphorus hose is interposed can be applied to each of the connecting portions of the pair of side members and the dash panel. However, the dash panel on the driver's seat side includes a steering shaft support member, and the dash panel itself. Therefore, by applying the structure of the present invention to at least the connection between the side member on the passenger seat side and the dash panel, the structure is effective against the separation of the joint portion.

  The vehicle body structure of the present invention according to claim 2 is the vehicle body structure according to claim 1, wherein the phosphorus hose includes a first brace joint plate portion corresponding to the side member reinforcing plate portion of the brace, A brace joining plate portion corresponding to the dash panel reinforcing plate portion of the brace, and joining the side member reinforcing plate portion of the brace to the first brace joining plate portion of the phosphorus hose. The dash panel reinforcing plate portion is joined to the second brace joining plate portion of the phosphorus hose so as to be coupled to the side member and the dash panel.

  In the present invention according to claim 2, the bonding between the brace and the phosphorus hose becomes stronger, the force input to the side member is distributed to the phosphorus hose, and the stress is prevented from concentrating on the bonding portion with the dash panel. The member and the dash panel are reinforced and joined.

  The vehicle body structure of the present invention according to claim 3 is the vehicle body structure according to claim 1 or claim 2, wherein the dash panel is provided with a dash cross member extending in a vehicle width direction, It is characterized by being joined to the lower side of the dash cross member.

  In the present invention according to claim 3, since the phosphorus hose is joined to the dash panel in the vicinity of members having a closed cross-sectional shape and high rigidity, reinforcement can be performed accurately.

  The vehicle body structure of the present invention according to claim 4 is the vehicle body structure according to any one of claims 1 to 3, wherein the extension plate portion of the phosphorus hose is joined to the front surface of the dash panel at a plurality of upper and lower positions. It is characterized by being.

  In this invention which concerns on Claim 4, since the joining site | part of a phosphorus hose is several places up and down, the stress concentration with respect to the input of a load can be suppressed more correctly.

  The vehicle body structure of the present invention is a vehicle body structure in which the side member and the dash panel are reinforced and joined in a state where the peeling force acting on the joint portion is reduced by the input from the vehicle body. And the peeling force which acts on a joining location is relieved, and the rigidity with respect to attachment is ensured even if the thickness of a structural member is made thin.

  FIG. 1 is a perspective view showing a vehicle body structure according to an embodiment of the present invention, FIG. 2 is a detail of an arrow II part in FIG. 1, FIG. 3 is an appearance of a phosphorus hose, FIG. FIG. 5 shows an external view as seen from the passenger compartment side with the dash panel removed.

  As shown in FIG. 1, a pair of front pillars 1 extending in the vertical direction of the vehicle are provided on the left and right sides of the front portion of the vehicle compartment S, and the front pillar 1 extends forward of the vehicle. The base ends of the pair of left and right upper frames 6 are joined. The left and right front pillars 1 are connected to each other by a cowl top panel 2 extending in the vehicle width direction. Below the cowl top panel 2 is a vehicle compartment S and a region in front of the vehicle compartment (in the case of a front engine vehicle, the engine compartment). : Hereinafter referred to as engine room). Cylindrical strut houses 4 that support the suspension device are provided on the left and right front sides of the dash panel 3, and the strut houses 4 are joined to the upper frame 6.

  A pair of left and right front floor side members (side members) 5 extending in the vehicle front-rear direction are disposed at positions on the inner side in the vehicle width direction from the front pillar 1 and below the upper frame 6. It extends from the lower side of the chamber S along the dash panel 3 to the front of the vehicle. A dash cross member 7 extending in the vehicle width direction is provided below the surface on the engine room side of the dash panel 3, and the side member 5 is coupled to the dash panel 3 at a portion of the dash cross member 7 via a brace 8. .

  Reference numeral 9 in FIG. 1 denotes a fender shield joined to the front side of the strut house 4.

  The structure of the connection between the side member 5 on the passenger seat side (left side in the traveling direction of the vehicle in the illustrated example) and the dash panel 3 will be specifically described with reference to FIGS.

  A brace 8 that covers the joint portion from the inner side in the vehicle width direction is joined to a joint portion of the side member 5 with the dash panel 3. The brace 8 includes an inner panel 5 a of the side member 5 and a dash cross member of the dash panel 3. 7, and is opposed to the front surface 3 a of the dash panel 3 on the lower side of the dash cross member 7. That is, the joint portion between the side member 5 and the dash panel 3 is reinforced by the brace 8.

  The brace 8 is joined to the inner panel 5a of the side member 5 and the dash cross member 7 by welding. On the other hand, a phosphorus hose 11 having substantially the same thickness as the brace 8 is joined by welding to a portion of the brace 8 facing the front surface 3a of the dash panel 3, and the phosphorus hose 11 is joined to the front surface 3a of the dash panel 3 by welding.

  That is, the brace 8 includes a front and rear surface 8a as a side member reinforcing plate that is joined to the inner surface of the inner panel 5a of the side member 5 and a dash panel reinforcing plate along the front surface 3a of the dash panel 3. The width surface 8b of the brace 8 is formed continuously, and the front and rear surfaces 8a and the width surface 8b of the brace 8 are substantially perpendicular to each other (see FIG. 4). The phosphorus hose 11 corresponds to the front / rear surface 11a (front / rear surface along the inner side in the vehicle width direction of the side member 5) corresponding to the front / rear surface 8a of the brace 8 and the width surface 8b of the brace 8. A width surface 11b as a second brace joint plate is formed continuously. Further, an extended plate portion 11c extending inward in the vehicle width direction and extending along the front surface 3a of the dash panel 3 is continuously formed on the width surface 11b of the phosphorus hose 11 (see FIG. 3).

  As shown in FIG. 4, the front and rear surfaces 11 a of the phosphorus hose 11 are welded to the front and rear surfaces 8 a of the brace 8 at the welding point A, and the width surface 11 b of the phosphorus hose 11 overlaps the width surface 8 b of the brace 8 and welded to the welding point B. At the same time, an extension plate portion 11c extending to the front surface 3a side of the dash panel 3 is welded to the front surface 3a of the dash panel 3 at a welding point C.

  For this reason, the brace 8 and the dash panel 3 are coupled via the phosphorus hose 11. That is, the brace 8 that reinforces the coupling between the side member 5 and the dash panel 3 is not directly welded to the front surface 3a of the dash panel 3, and is opposite to the side member 5, that is, the front and rear surfaces 8a and the width surface of the brace 8. The extension plate portion 11c of the phosphorus hose 11 is welded to the front surface 3a of the dash panel 3 at a welding point C away from the intersecting corner portion of 8b. Therefore, with respect to the input from the side member 5 to the brace 8, the stress concentration at the joint portion of the front surface 3a of the dash panel 3 is relieved, and the peeling force acting on the joint portion with the front surface 3a is relieved. It will be.

  Therefore, the joint between the brace 8 and the phosphorus hose 11 is strengthened, the force input to the side member 5 is distributed to the phosphorus hose 11, and stress is not concentrated on the joint portion with the dash panel 3, while the side member 5 The dash panel 3 is reinforced and joined.

  Since the brace 8 is a member that is reinforced by joining to the side member 5, a certain thickness is necessary and large, but in order to securely join the dash panel 3, it is easy to peel off with heavy objects. . Increasing the thickness of the dash panel 3 is advantageous for peeling, but increases the weight and increases the cost. In the present invention, since the brace 8 and the dash panel 3 are coupled via the phosphorus hose 11, the peeling force acting on the joint between the brace 8 side and the front surface 3a of the dash panel 3 is alleviated. Become. By reducing the peeling force, the thickness of the member can be reduced while maintaining the strength of the reinforcement, and the weight can be reduced.

  The brace 8 and the phosphorus hose 11 (front and rear surfaces 11a) are joined by welding at a plurality of upper and lower locations (a plurality of welding points exist), and the phosphorus hose 11 (extension plate portion 11c) and the dash panel 3 are disposed at a plurality of upper and lower locations. They are joined by welding (a plurality of welding points exist). For this reason, the stress concentration with respect to the input of the load can be suppressed more accurately. At the time of assembly, the brace 8 and the phosphorus hose 11 are joined by welding to form an integral part, and the brace 8 and the phosphorous hose 11 that are integrated parts are welded to the side member 5 and the dash panel 3.

  The brace 8 is continuously extended from the portion of the side member 5 that covers the inner panel 5a toward the passenger compartment (see FIG. 2), and the portion that covers the dash cross member 7 is provided. The portion of the dash panel 3 on the lower side of the dash cross member 7 is a portion where a member having a closed cross section formed by the brace 8 and a member having a closed cross section formed by the dash cross member 7 intersect. .

  For this reason, since the dash panel 3 in the vicinity of the members having a closed cross-sectional shape and high rigidity is a disadvantageous portion in strength, the extension plate portion 11c of the phosphorus hose 11 is abutted against the front surface 3a of the dash panel 3, and the phosphorus hose 11 Is joined to the front surface 3a by welding, and the reinforcement is performed accurately.

  In the vehicle body structure described above, for example, when an input such as vibration from the strut house 4 is transmitted to the side member 5, it is distributed and transmitted to the dash panel 3 via the brace 8 and the phosphorus hose 11. The brace 8 ensures the rigidity of the side member 5 and the dash panel 3 at the input of the connecting portion. On the other hand, the vibration or the like transmitted to the brace 8 is welded between a portion that is continuous at a substantially right angle, that is, a welding point D (see FIG. 4) with the inner panel 5a of the side member 5 and the width surface 11b of the phosphorus hose 11. Absorption is performed at a portion between the point B (see FIG. 4) (a bent portion, a portion where the phosphorus hose 11 does not overlap).

  For this reason, the input of vibration or the like from the strut house 4 to the welding point C (see FIG. 4) between the extension plate portion 11c of the phosphorus hose 11 and the front surface 3a of the dash panel 3 is suppressed, and the welding point C (see FIG. 4). The stress concentration on the hose 11 can be relaxed, and the peeling force acting on the phosphorus hose 11 and the front surface 3a of the dash panel 3 is suppressed.

  As a result, the force input to the side member 5 is dispersed in the phosphorus hose 11 so that stress is not concentrated at the joint portion with the dash panel 3 and the thickness of the dash panel 3 and the brace 8 is increased. In other words, the side member 5 and the dash panel 3 are reinforced and joined in a state where the peeling force acting on the joint portion is relaxed by the input from the vehicle body side.

  The structure in which the phosphorus hose 11 is interposed can also be applied to each of the joints between the pair of side members 5 and the dash panel 3, but the dash panel 3 on the driver's seat side includes a steering shaft support member. Since the dash panel 3 itself has high rigidity, at least the structure of the present invention is applied to the connection between the side member 5 on the passenger seat side and the dash panel 3 so that the structure is effective against peeling of the joint portion. It becomes.

  The brace 8 has a front and rear surface 8a and a width surface 8b, and the phosphorus hose 11 has a front and rear surface 11a, a width surface 11b, and an extension plate portion 11c. The front and rear surface 8a, the front and rear surface 11a, the width surface 8b, and the width surface 11b By joining, the brace 8 and the phosphorus hose 11 are joined, and the extension plate part 11c of the phosphorus hose 11 is joined to the front surface 3a of the dash panel 3, so that the phosphorus hose 11 and the dash panel 3 It is possible to suppress the concentration of stress at the joint location.

  Therefore, the above-described vehicle body structure is a vehicle body structure in which the side member 5 and the dash panel 3 are reinforced and coupled in a state where the peeling force acting on the joint portion is reduced by the input from the vehicle body side.

  Another embodiment of the phosphorus hose will be described with reference to FIGS. FIG. 6 shows the appearance of a plate-like phosphorus hose, and FIG. 7 shows a cross section of the joint (corresponding to FIG. 4 taken along the line IV-IV in FIG. 2). In FIG. 7, the same members as those in FIG.

  In the embodiment shown in FIGS. 1 to 5, the phosphorus hose 11 having an L-shaped cross section having the front and rear surfaces 11a, the width surface 11b, and the extension plate portion 11c is applied, but the phosphorus hose 11A shown in FIG. Is a plate having a width surface 11b and an extension plate portion 11c. As shown in FIG. 7, the width surface 11b of the phosphorus hose 11A overlaps with the width surface 8b of the brace 8 and is welded and joined at the welding point B, and the extension plate portion 11c extending to the front surface 3a side of the dash panel 3 is a dash panel. 3 is welded and joined at a welding point C to the front surface 3a.

  For this reason, the brace 8 and the dash panel 3 are coupled via the plate-like phosphorus hose 11A, and the joint portion of the front surface 3a of the dash panel 3 with respect to the input from the side member 5 side to the brace 8 The stress concentration on the surface is alleviated, and the peeling force acting on the joint with the front surface 3a is alleviated. Since the phosphorus hose 11A has a plate shape and is miniaturized, the brace 8 has a degree of freedom and can be reduced in weight.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field of a vehicle body structure in which a side member and a dash panel extending at a front portion of a vehicle compartment are coupled.

1 is a perspective view illustrating a vehicle body structure according to an embodiment of the present invention. It is a detailed perspective view of the arrow II part in FIG. It is an external view of a phosphorus hose. It is the IV-IV line arrow directional view in FIG. It is the external view seen from the vehicle compartment side of the state which removed the dash panel. It is an external view of a plate-shaped phosphorus hose. It is sectional drawing (equivalent to FIG. 4) of a junction part.

Explanation of symbols

1 Front Pillar 2 Cowl Top Panel 3 Dash Panel 3a Front 4 Strut House 5 Front Floor Side Member (Side Member)
6 Upper frame 7 Dash cross member 8 Brace 8a Front and rear surfaces of brace 8 8b Width surface of brace 8 9 Fender shield 11 Lin hose 11a Front and rear surfaces 11b of phosphorus hose 11 Width surface 11c of phosphorus hose 11 Extension plate portion of phosphorus hose 11

Claims (4)

A side member of a part extending to the front part of the vehicle compartment of the vehicle;
A dash panel that partitions the vehicle compartment and a front region of the vehicle compartment;
A brace provided at a connecting portion between the side member and the dash panel, and having a side member reinforcing plate along the inner surface in the vehicle width direction of the side member and a dash panel reinforcing plate along the front surface of the dash panel; ,
An extension plate portion provided at a connection portion between the side member reinforcement plate portion and the dash panel reinforcement plate portion of the brace and extending further inward in the vehicle width direction from the dash panel reinforcement plate portion and along the front surface of the dash panel A phosphorus hose having
The side member reinforcing plate portion of the brace is joined to the side member, the dash panel reinforcing plate portion of the brace is joined to the phosphorus hose, and the extension plate portion of the phosphorus hose is joined to the front surface of the dash panel. The vehicle body structure is characterized in that the side member and the dash panel are combined. The vehicle body structure according to claim 1,
The phosphorus hose is
A first brace joint plate corresponding to the side member reinforcing plate of the brace;
A second brace joint plate corresponding to the dash panel reinforcing plate of the brace,
While joining the side member reinforcing plate portion of the brace to the first brace joining plate portion of the phosphorus hose, joining the dash panel reinforcing plate portion of the brace to the second brace joining plate portion of the phosphorus hose, The vehicle body structure characterized by being combined with the side member and the dash panel. In the vehicle body structure according to claim 1 or claim 2,
The dash panel is provided with a dash cross member extending in the vehicle width direction,
The phosphorus hose is joined to the lower side of the dash cross member. The vehicle body structure according to any one of claims 1 to 3,
The extension plate portion of the phosphorus hose is joined to the front surface of the dash panel at a plurality of upper and lower portions.

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