JPH0492775A - Front body construction for vehicle - Google Patents

Abstract

PURPOSE:To disperse and support load with a front pillar and a center pillar by mounting a door reinforcement over a door lock part and a door hinge fitting part between, and combining the door reinforcement with a cowl side member through a door hinge. CONSTITUTION:At sudden acceleration or deceleration of a vehicle in running, load applied on a front suspension member 16 is transmitted from a fitting part 18 to a front side member 12, and a part is transmitted from the fitting part 18 to a cowl side member 28. In this case, the rear end part of the cowl side member 28 is opposed to the front end part of a door reinforcement 50 through a door hinge part 30. With the door reinforcement 50, the receiving space 48 in a door 40 is continued to a center pillar 54 through a door lock part 52. Hereby, the above-stated load is supported with not only a front pillar 26, but the center pillar 54 continued with the front pillar 26, the door reinforcement 50, and the door lock part 52.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a cowl which connects a suspension member attachment portion of a front side member and a door hinge attachment portion of a front pillar, and which has a closed cross section formed by a cowl side panel. The present invention relates to a front body structure of a vehicle equipped with a side member.

[Prior art]

6 and 7 show a conventional front body structure of a vehicle as shown in Japanese Utility Model Application No. 11279/1983. FIG. 7 is a perspective view of the front pillar 60 of the vehicle and its surroundings as seen diagonally from below. A cowl side panel 64 is connected to the front of the vehicle from the portion where the rocker 62 and the front pillar 60 are connected, and a front side member 68 is attached via a dash panel lower 66. Further, the front pillar 60 and the front side member 68 have gussets 70A and 70B.
are connected by The gusset 70A is coupled to the front side member 68 and has a closed cross section. Further, the gasket 70B is coupled to the dash panel lower 66 to form a closed cross section. Therefore, the load applied to the front side member 68, particularly the vehicle longitudinal direction load, is supported by the front pillar 60 via the gussets 70A and 70B.

[Problem to be solved by the invention]

However, in the above structure, the load is received only by the front pillar 60, so if the front pillar 60 has low rigidity, the load cannot be supported sufficiently by the front pillar 60, and the gusset 70A
, 70B cannot be reliably absorbed.

In order to solve this problem, it is necessary to increase the rigidity of the front pillar 60, but this results in an increase in the number of parts and weight.

In consideration of the above-mentioned facts, the present invention has been developed to distribute the load applied to the front pillar, so that the energy of the load from the front of the vehicle can be absorbed in front of the front pillar without increasing the rigidity of the front pillar. The purpose is to obtain a body structure.

[Means to solve the problem]

The front body structure of a vehicle according to the present invention includes a cowl side member that connects a suspension member attachment portion of a front side member and a door hinge attachment portion of a front pillar, and has a closed cross section formed by a cowl side panel. In the front body structure, a door reinforcement is spanned in a substantially straight line between a door lock portion that engages the door with the center pillar and the door hinge attachment portion, and the vehicle front end of the door reinforcement and the The present invention is characterized in that the cowl side member is coupled to the rear end of the vehicle via the door hinge.

[Effect]

According to the present invention, the load transmitted from the suspension member to the front side member, particularly the load in the longitudinal direction of the vehicle, is transmitted to the front pillar via the cowl side member. Here, the vehicle rear end of the cowl side member faces the door hinge attachment portion, and a door reinforcement is attached to the door, the vehicle front end facing the door hinge attachment portion. This door reinforcement extends toward the rear of the vehicle in a substantially straight line, and its rear end portion of the vehicle is disposed at the door lock portion.

Therefore, a portion of the load transmitted from the cowl side member is transmitted to the center pillar via the door hinge mounting portion, door reinforcement, and door lock portion. Therefore, the load from the cowl side member is distributed between the front pillar and the center pillar, and the load transmitted to the front pillar can be reduced.

As a result, the front pillar and the center pillar can support the load without needing to reinforce the front pillar with a reinforcing member or the like, and the energy for the load can be absorbed in front of the front pillar.

〔Example〕

1 and 3 show a front body portion 10 of a vehicle according to this embodiment. This front body part 1
0, front side members 12 having a closed cross-section structure are arranged parallel to each other at both ends in the vehicle width direction, extending in the longitudinal direction of the vehicle. The vehicle rear end portions of the front side members 12 are connected to the front end portions of floor under-intensions 14 each having a closed cross-section structure. Therefore, the closed cross sections of the front side member 12 and the floor under reinforcement 14 are continuous.

A front suspension member li<41 to which a lower end portion of a suspension (not shown) is attached is passed to the front side members 12 at both ends in the vehicle width direction, and a bracket 1
It is fixed to the lower end surface of the front side member 12 via a bolt (not shown) via a bolt (hereinafter, this portion will be referred to as a mounting portion 18). Therefore, the load transmitted from the tires while the vehicle is running is transmitted to the front side members 12 via the front suspension members 16.

A front fender apron 20 is provided on the front side of the vehicle, and a cowl side panel 22 is provided on the rear side of the vehicle at the upper part of the front side member 12. A suspension tower 24 is formed on the front fender apron 20, and the upper end of the suspension is attached. Cowl side panel 22 is front pillar 2
6. As shown in FIG. 2, the front pillar 26 is bent into a substantially U-shaped cross section, and both bent ends are bent in directions away from each other to form a flange portion 26A.
The cowl side member 28 is connected to the flange portion 26A to form a closed cross section.

As shown in FIG.
2 to the front of the vehicle. A flange portion 28A is formed at the peripheral edge of the cowl side member 28, and this flange portion 28A is coupled to the cowl side panel 22 to form a closed cross section. The cowl side member 28 extended toward the front of the vehicle is connected to the suspension tower 24.
It is bent at a substantially right angle toward the inside of the vehicle in front of the mounting portion 18, and is also curved toward the mounting portion 18.

A bracket 32 of an upper side door hinge 30 is fixed to the front pillar 26 by a bolt 34 so as to be attached to the vehicle outer surface of the cowl side panel 22 and sandwich the vehicle rear end of the cowl side panel 22. The vehicle rear side of the bracket 32 is bent at a substantially right angle toward the outside of the vehicle, and a hinge body 38 is pivotally supported via a shaft 36. The hinge body 38 is fixed to the door 40 by a bolt 42. Furthermore, the door hinge on the lower side has the same structure (not shown).

The door 40 is composed of a door outer 44 and a door inner 46, and a door trim (not shown) is attached from the inside of the vehicle so that a housing space 48 for a window regulator (not shown) and the like is secured. A door reinforcement 50 is disposed in the housing space 48 at a position that does not interfere with the movement trajectory of the window regulator, extending in the longitudinal direction of the vehicle.

The door reinforcement 50 has a closed cross-section structure. The vehicle front end of this door reinforcement 50 corresponds in height to the hinge body 38 of the upper door hinge 30 and is collinear with the bolt 42 . Therefore, the vehicle front end of the door reinforcement 50 and the vehicle rear end of the cowl side member 28 are opposed to each other.

On the other hand, the vehicle rear end of the door reinforcement 50 is
Its height position corresponds to that of the door lock portion 52 (see FIG. 1). This door lock part 52 is connected to a striker 56 attached to the center pillar 54 when the door 40 is closed.
It is designed to be engaged with. As shown in FIG. 5, a relief groove 50A is formed in the door reinforcement 50 in correspondence with the position where the striker 56 is disposed.

Therefore, when the door 40 is closed, the cowl side member 2
8 and the door reinforcement 50 are arranged in a substantially straight line, which is the optimum arrangement for transmitting the load from the front of the vehicle.

The lower ends of the front pillar 26 and the center pillar 54 are respectively coupled to rockers 58 that are disposed at both ends in the width direction of the vehicle in the longitudinal direction of the vehicle. This rocker 58 has a closed cross-section structure, has reinforcements (not shown) installed inside, and is a highly rigid member.
4, the load transmitted from the cowl side member 28 can be supported reliably.

The operation of this embodiment will be explained below.

While the vehicle is running, particularly during sudden acceleration or deceleration, a load is applied to the front suspension member 16 by the suspension tower in the longitudinal direction of the vehicle. This load is transmitted from the mounting portion 18 to the front side member 12. Further, a portion of this load is transmitted from the mounting portion 18 to the cowl side member 28.

Here, since the vehicle rear side of the front side member 12 is connected to a highly rigid floor under reinforcement 14, the energy of the load is transferred to the floor under reinforcement due to the support reaction force of this floor under reinforcement 14. It is absorbed before the ment 14.

On the other hand, the vehicle rear end portion of the cowl side member 28 faces the vehicle front end portion of the door reinforcement 50 via the door hinge portion 30. Further, this door reinforcement 50 is connected to the center pillar 54 via the door lock portion 52 in a substantially horizontal state in the accommodation space 48 within the door 40 .

Therefore, the load transmitted from the mounting portion 18 to the cowl side member 28 is not only applied to the front pillar 26 but also to the front pillar 26 and the door reinforcement 50.
It is also supported by a center pillar 54 that is continuous with the door lock part 52.

That is, the load from the cowl side member 28 is shared and received by both the front pillar 26 and the center pillar 54.

Since the lower ends of the front pillar 26 and the center pillar 54 are connected to the highly rigid rocker 58, the load is transmitted to the cowl side member 28 not only by the front pillar 26 but also by the support reaction force of the center pillar 54. is absorbed in front of the front pillar 26.

In this way, the structure is such that the load is absorbed in front of the floor under reinforcement 14 and the center pillar 26, so when the load is large, the energy of the load is absorbed by the deformation of the cowl side member 28. The center pillar 26 and the rear thereof are not deformed.

According to this embodiment, the load applied to the front pillar 26 can be dispersed to the center pillar 54 without increasing the rigidity of the front pillar 26.
The cowl side member 28 disposed in front of the cowl side member 6 can reliably absorb energy.

〔Effect of the invention〕

As explained above, the vehicle front body structure according to the present invention absorbs the energy of the load from the front of the vehicle in front of the front pillar without increasing the rigidity of the front pillar by dispersing the load applied to the front pillar. It has the excellent effect of being able to

[Brief explanation of drawings]

Fig. 1 is a side view of a part of the front body according to this embodiment, Fig. 2 is a plan sectional view of the front body and door attachment part, Fig. 3 is a perspective view of part of the front body, and Fig. 4 is a single cowl side member. 5 is a perspective view of a single door reinforcement, FIG. 6 is a side view of a portion of a conventional front body, and FIG. 7 is a perspective view of a portion of a conventional front body viewed diagonally from below the vehicle. . DESCRIPTION OF SYMBOLS 10... Front body part, 12... Front side member, 16... Front suspension member 2B... Front pillar 28... Cowl side member 30... Door hinge part, 40... Door, 50 ...Door reinforcement, 52...Door lock part, 54...Center pillar

Claims (1)

[Claims] (1) A front body structure for a vehicle comprising a cowl side member that connects a suspension member attachment portion of a front side member and a door hinge attachment portion of a front pillar, and has a closed cross section formed by a cowl side panel, the door A door reinforcement is stretched in a substantially straight line between the door lock portion that engages with the center pillar and the door hinge attachment portion, and the front end of the vehicle of the door reinforcement and the rear end of the vehicle of the cowl side member are connected to each other. A front body structure of a vehicle, characterized in that: and are coupled via the door hinge.