JP2530871Y2 - Front body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a front body structure of an automobile which is improved so as to increase the strength of a hinge attachment portion of a front hood.

2. Description of the Related Art When a vehicle collides head-on, a front hood is used as a kind of cushioning material to reduce the impact of a passenger.

Installation of the conventional front hood is shown in Figs. 10 and 11.
As shown in the figure, a cowl box 3 is formed by a panel cowl top 1 and a panel cowl upper 2, a reinforcement wiper arm 4 is provided on the back side of the panel cowl top 1, and a nut welded to the rear side of the reinforcement wiper arm 4. A front hood hinge 7 is fastened by screwing a bolt 6 to 5. The front hood 8 is fixed to the front hood hinge 7 so that the front hood 8 can be opened and closed via the front hood hinge 7. In this conventional mounting structure of the front hood 8, when the vehicle collides head-on, the cowl box 3 and the front hood 8 are deformed to reduce the impact force and reduce the impact force applied to the passenger.

(Problem to be Solved by the Invention) In the above-described conventional front vehicle body structure, the cowl box 3 is deformed when a vehicle collides head-on. Therefore, the impact force received by the front hood 8 is absorbed by deforming the cowl box 3 positively. In order to buffer the impact force at the time of collision, the front hood 8 and the cowl box 3 must be deformed. To satisfy this condition, a balance between the rigidity of the front hood 8 and the rigidity of the cowl box 3 is required. You. The cowl box 3 is required to have the rigidity required for the front hood 8 not to hit the windshield and to be deformed when the vehicle collides head-on.

The present invention has been made in view of such a demand, and allows a deformation of the cowl box, and a front body structure that allows the front hood to be deformed so that the front hood does not contact the windshield. To provide.

(Means for Solving the Problems) A means according to the present invention for solving the above problems is to fit a reinforcement cowl box inner into a cowl box composed of a panel cowl top, a panel cowl upper and a front panel cowl. Then, the reinforcement cowl box inner is fastened with bolts together with the front hood hinge via the reinforcement cowl box on the panel cowl top, and the rear side of the reinforcement cowl box inner is brought into close contact with the panel cowl upper, A gap is formed between the front side of the reinforcement cowl box inner, the lower part of the front panel cowl and the lower part of the reinforcement cowl box, and the panel cowl upper.

(Operation) Since the present invention is configured as described above, the following operation is provided. That is, the reinforcement cowl box inner is inserted into the cowl box composed of the panel cowl top, the panel cowl upper, and the front panel cowl, and the reinforcement cowl box inner is inserted into the panel cowl top with the reinforcement force wiper arm interposed. Bolts together with the front hood hinge to form a gap between the front side of the reinforcement cowl box inner, the front panel cowl and the lower part of the reinforcement cowl box inner, and the panel cowl upper. At the time of a frontal collision, the part of the reinforcement cowl box inner that is not bolted is
The cowl box is not integrated with the cowl box, and the cowl box is freely deformed in the area of the gap, and buffers and attenuates the first impact force at the time of collision.

Then, the rear side of the reinforcement cowl box was brought into close contact with the panel cowl upper, so that the first impact force at the time of the collision was buffered, and the cowl box that was freely deformed in the gap was replaced with the reinforcement cowl next. By contacting the box inner, further deformation of the cowl box is restrained, and the impact force of the front hood is received by the reinforcement cowl box inner. Thereby, the front hood is subsequently deformed, and the second impact force at the time of collision is buffered.

(Example) One example of the present invention will be described below. In FIG. 1, a cowl box 3 is formed by a panel cowl top 1, a panel cowl upper 2, and a front panel cowl 10,
A reinforcement cowl box inner 11 is fitted into the cowl box 3. The reinforcement cowl box inner 11 fitted in this way is joined with the front hood hinge 6 (see FIG. 11) by a nut 5 welded to the back surface of the reinforcement cowl box inner 11 via the reinforcement wiper arm 4. Fastened to panel cowl top 1 with bolts 7 (see FIG. 10). In the case of this embodiment, gaps 12 and 13 are formed between the front panel cowl 10 and the panel cowl upper 2, and the rear side of the reinforcement cowl box inner 11 is in close contact with the panel cowl upper 2. Thus, the reinforcement cowl box inner 11 is fitted into the cowl box 3. The reinforcement cowl box inner 11 will be described in more detail. As shown in FIGS. 2 to 5, the reinforcement cowl box inner 11 is formed in a substantially box shape, and the upper flange 17 The lower flange 18, the front flange 19 and the rear flange 20 are integrally formed by press working or the like. In the case of this embodiment, a nut 21 is welded to the inside of the rear side flange 20 so that a contact portion 14 between the reinforcement cowl box inner 11 and the panel cowl upper 2 in FIG. Is also good. As shown in FIG. 4, the upper flange 17 is narrowed to form a constricted portion 22. Also, as shown in FIG. 2, a rib 15 is formed on the bottom plate 16 in order to secure the strength in the direction of the impact force F. The rib 15 projects partly from the bottom plate 16 by pressing as shown in FIG. Is formed. As shown in FIGS. 6 to 8, a fastening surface 23 is provided on the reinforcement wiper arm 4, and a hole 24 for a bolt is formed in the fastening surface 23. Reference numeral 25 denotes an integrally formed wiper mounting seat. FIG. 9 shows an assembled state of only one end of the panel cowl top 1, but a reinforcement cowl box inner 11 is similarly provided at the other end of the panel cowl top 1.

The operation of the present embodiment having such a configuration will be described below. In FIG. 1, the panel cowl top 1 is provided with a front hood hinge 7 together with a reinforcement wiper arm 4 and a reinforcement cowl box inner 11 with a bolt screwed to a nut 5 as shown in FIG. 10 or FIG. The front hood 8 is attached to the front hood hinge 7. As described above, since only the upper flange 17 of the reinforcement cowl box inner 11 is fastened with bolts, the other portions where the reinforcement cowl box inner 11 is not fastened with bolts are between the panel cowl upper 2 and the other portions. Are shifted from each other. Alternatively, as shown in FIG. 2, a nut is welded to the inside of the rear flange 20 to fasten the upper flange 17 and the rear flange 20 to the panel cowl upper 2 with bolts, and as shown in FIG. 12 and 13 are formed to allow free deformation of the panel cowl upper 2. When the vehicle collides head-on, the cowl box 3 is deformed by the impact force, the initial impact force is buffered and attenuated, and the cowl box 3 comes into contact with the reinforcement cowl box inner 11 due to this deformation. Due to the contact between the cowl box 3 and the reinforcement cowl box inner 11, the deformation of the cowl box 3 is restrained by the reinforcement cowl box inner 11 and is not further deformed. When the deformation of the cowl box 3 is restricted as described above, the impact force already attenuated acts on the front hood 8, and when the impact force is strong, the front hood 8 is deformed to absorb the impact force. In this way, the impact force at the time of a frontal collision of the car is first attenuated by the deformation of the cowl box 3 and the reinforcement cowl box inner
At 11, the deformation of the cowl box 3 is restrained, and then the front hood 8 is deformed.
Will be absorbed by the deformation. The deformation of the cowl box 3 is restricted by the reinforcement cowl box inner 11 in this way, and the front hood 8 is deformed by the restriction of the deformation of the cowl box 3. Is restricted by the front hood hinge 7.
Since the impact force has already been attenuated by the deformation of the cowl box 3, the force for moving the front hood 8 is small, and the movement of the front hood 8 is more reliably restrained by the front hood hinge 7.

(Effects of the Invention) As described in detail above, according to the present invention, the reinforcement cowl box inner is inserted into the cowl box composed of the panel cowl top, the panel cowl upper and the front panel cowl, and the panel cowl top is leaned. The reinforcement cowl box inner is bolted together with the front hood hinge via the force wiper arm with bolts, and the front side of the reinforcement cowl box inner and the front panel cowl and the lower part of the reinforcement cowl box inner and panel cowl. A gap is formed between the upper and the upper, and when the car collides head-on, the cowl box is freely deformed in the area of the gap, damping and damping the first impact force at the time of collision, and then the reinforcement Ment cowl Since the rear side of the box inner is in close contact with the panel cowl upper, the cowl box that has been freely deformed in the gap then abuts the reinforcement cowl box inner to restrain further deformation of the cowl boss, The impact force already attenuated by the cowl box is received by the reinforcement cowl box inner to deform the front hood and buffer the second impact force at the time of collision.

Thus, the first impact force is attenuated by the deformation of the cowl box, the front hood is deformed by the attenuated and weakened impact force, and the synergistic effect of the impact force support acting on the front hood by the reinforcement cowl box inner. Thereby, it is possible to prevent the front hood from moving in the vehicle direction. In addition, by attenuating the impact force at the time of the collision in two steps, the influence of the impact force on the occupant can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of the present invention, FIG. 2 is a front view of a reinforcement cowl box inner, FIG.
FIG. 2 is a longitudinal sectional view taken along the line BB in FIG. 2, and FIG.
5 is a left side view of FIG. 2, FIG. 6 is a front view of the reinforcement wiper arm, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a right side of FIG. 9 is an assembled perspective view, FIG. 10 is a perspective view of a conventional example, and FIG.
It is a longitudinal cross-sectional view in the AA line of a figure. 1 Panel cowl top 2 Panel cowl upper 3 Cowl box 4 Reinforcement wiper arm 7 Front hood hinge 8 Front hood 11 Inner reinforcement cowl box inner

Claims (1)

(57) [Scope of request for utility model registration] 1. A reinforcement cowl box inner is inserted into a cowl box comprising a panel cowl top, a panel cowl upper and a front panel cowl, and a reinforcement is interposed in the panel cowl top through a reinforcement wiper arm. The inner cowl box is fastened together with the front hood hinge with bolts, and the rear side of the reinforcement cowl box inner is brought into close contact with the panel cowl upper.The front side of the inner cowl box inner and the front panel cowl and the reinforcement A front body structure in which a gap is formed between a lower portion of a cowl box inner and a panel cowl upper.