JPH04212677A - Hood supporting device - Google Patents

Abstract

PURPOSE:To absorb an impact stroke in a very simple structure by installing a variable supporting part in a support upholding the rear end of a hood, opening or closing a body front, at the side of a car body, and displacing this variable supporting part with a downward load from top of the hood. CONSTITUTION:A hood 1 is one that opens or closes a body front part, and a rear end in the longitudinal direction of a car body is supported at the body side via a hinge 3 as a support free of rotation, and this hinge 3 consists of a supporter 5 at the side of the hood 1, another supporter 7 at the body side and a hinge shaft 9 rotatably supporting both these supporters 5, 7. A bending part 13 as a variable supporting part is formed at the backside in and around a hinge 9 for a mounting base part 7b so the supporter 7 at the body side, and a front energy absorbing part 15 at the more front side than a rotation supporting part 7a, respectively. Thus, impact energy absorption is sufficiently performed by deformation in the front energy absorbing part 15 and the hood 1, through which the head of a pedestrian struck by a car is thus protectable.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood support device for supporting a hood for opening and closing an engine compartment, etc. in the front of a vehicle body.

0002

2. Description of the Related Art As a conventional hood support device, for example, there is one shown in FIG.
(See Publication No. 2). That is, the hood 101 that opens and closes the engine room or trunk room at the front of the vehicle body has its front end in the longitudinal direction of the vehicle body supported by the vehicle body side by a hinge (not shown), and its rear end portion supported by the vehicle body side via a locking device (not shown). It is something that A flip-up machine 103 is provided on the rear end side of the hood 101, and when a pedestrian collides with a pedestrian safety guard 105 provided at the front of the vehicle body, a wire 107 is connected to the rod 10 of the flip-up machine 103.
3a is released, and the hood 101 can be flipped up a predetermined amount as shown by the two-dot chain line in the figure. As a result, the hood 101 is separated from the built-in contents in the engine room or the trunk room, a shock absorbing stroke is ensured, and pedestrians who are thrown up by the deformation of the hood 101 or the like are protected.

0003

[Problems to be Solved by the Invention] However, with the above structure, the structure of the flip-up machine 103, pedestrian safety guard 105, etc. becomes extremely complicated, which may cause an increase in cost and weight. be.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hood support device that can ensure an impact stroke with an extremely simple structure.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a variable support portion in a support that supports the rear end of the hood that opens and closes the front of the vehicle body in the longitudinal direction of the vehicle body toward the vehicle body side. The variable support section is configured to be displaced by a predetermined downward load from the upper surface, thereby lowering the support tool.

[0006]

[Operation] According to the above structure, the variable support portion is deformed by a downward load from the upper surface of the hood, and the support of the hood can be lowered. A shock absorbing stroke can be ensured by lowering the support due to deformation of the variable support portion or the like.

[0007]

[Embodiments] Examples of the present invention will be described below.

FIGS. 1 and 2 are cross-sectional views of a hood support device according to an embodiment of the present invention. FIG. 1 shows the hood in the closed state, and FIG. 2 does not show the hood, but shows the hood in the open state. Indicates the condition.

As shown in FIG. 1, the hood 1 opens and closes the front part of the vehicle body, for example, the engine room, and its rear end in the longitudinal direction of the vehicle body is rotatably supported on the vehicle body side via a hinge 3 serving as a support. . Although not shown, the front side of the hood 101 is releasably supported on the vehicle body side via a locking device.

As shown in FIGS. 1, 2, and 3, the hinge 3 includes a support 5 on the hood 1 side, a support 7 on the vehicle body side, and a hinge shaft 9 that rotatably supports both the supports 5 and 7. It consists of The support body 5 on the hood side consists of a hood rotation part 5a along the vertical direction and a hood attachment part 5b bent and formed on the upper part of the hood rotation part 5a, and the hood attachment part 5b has a hood attachment hole 5c. It is provided. Further, a hook 11 is provided at the front lower part of the hood rotating portion 5a.

The support body 7 on the vehicle body side is composed of a rotary support portion 7a extending in the vertical direction, and a mounting base portion 7b formed by bending the lower end of the rotary support portion 7a. The hood rotation part 5a is rotatably supported by the rotation support part 7a via the hinge shaft 9.

The mounting base portion 7b extends back and forth beyond the rotation support portion 7a, and is provided with a bent portion 13 protruding upward as a variable support portion on the rear side near the hinge shaft 9. Therefore, the hinge 3, which serves as a support for supporting the hood 1 on the vehicle body side, is provided with a bent portion 13, which serves as a variable support portion. However, the bent part 13 is the hinge 3
It is not necessary to directly provide the hinge 3, but it is also possible to add a mounting panel in addition to the hinge 3, to support the hinge 3 on the vehicle body side via the mounting panel, and to provide the mounting panel with a bent portion. Further, a rear end support portion 7c is provided on the rear side of the bent portion 13 of the mounting base portion 7b, and a base portion attachment hole 7d is provided in this rear end support portion 7c. Further, a front energy absorbing portion 15 is bent and formed on the mounting base portion 7b on the front side of the rotation support portion 7a. A front end support part 7e is provided on the front side of this front energy absorption part 15,
A base attachment hole 7f is provided in this front end support portion 7e.

A stopper panel 17 is provided on the upper front surface of the mounting base portion 7b. The front end portion 17a of this stopper panel 17 is connected to the front end support portion 7 of the mounting base portion 7b.
The front end portion 17a is provided with a through hole 17b similar to the base attachment hole 7f. The rear side 17c of the stopper panel 17 is the mounting base portion 7
b, and is provided with a lock hole 19.

On the other hand, a recess 23 is provided on the upper surface of the hood ridge reinforcement 21 on the vehicle body side, and a support hole 25 is provided in the center of the recess 23 . A reinforcing plate 27 is attached to this support hole 25 to fix the hood support device. That is, the reinforcing plate 27 includes a guide portion 27a facing into the support hole 25 and a mounting flange 27b formed around the guide portion 27a, and a fixing through hole 27c is formed in the mounting flange 27b.

[0015] And, Hood Ridge Reinforce 21
In the recess 23, the mounting flange 27b of the reinforcing plate 27 is placed on the upper surface around the recess 23, and the guide portion 27a
faces downward from the support hole 25. Further, the rear end support part 7c and the front end support part 7e of the mounting base part 7b of the hinge 3 are placed on the mounting flange 27b of the reinforcing plate 27 in the recess 23, and the hood ridge reinforcement 21 is placed on the rear end support part 7c side. , are fastened and fixed by bolts and nuts 29 passing through the through hole 27c of the mounting flange 27b and the base part mounting hole 7d of the rear end support part 7c. On the side of the front end support portion 7e, it is similarly fastened and fixed by bolts and nuts 31 passing through the hood ridge reinforcement 21, the through hole 27c, the base attachment hole 7f, and the through hole 17b. Note that the rear end portion of the hood 1 is fastened and fixed to the hood mounting portion 5b by bolts and nuts 33 passing through the hood mounting hole 5c. 35 is a windshield.

In this attached state, the bent portion 1 of the hinge 3
3 is located just above the rear end of the guide portion 27a of the reinforcing plate 27. Further, the front energy absorbing portion 15 is located immediately above the front end of the guide portion 27a. When the hood 1 is closed, the hook 11 enters the lock hole 19 of the stopper panel 17 as shown in FIG.

Even if the front part of the vehicle body collides with a pedestrian and the hood 1 receives a rearward load, the hook 11 remains in the lock hole 19.
By engaging with , movement of the hood 1 toward the rear of the vehicle body is restricted with respect to the bolts and nuts 31 and, in turn, with respect to the hood ridge reinforcement 21 . Next, the pedestrian is thrown up, and an impact force F is applied from the head to the rear end of the hood 1 as shown in Fig. 4.
When the hood 1 acts, the rear end 1a of the hood 1 first deforms until it comes into contact with the hinge 3, absorbing the impact energy of the head. Therefore, in the case of a minor collision, the head can be sufficiently protected even by such deformation of the hood 1.

Next, when the rear end 1a of the hood comes into contact with the hinge 3, a predetermined downward load is applied to the hinge 3, and the bent portion 13 is first deformed, causing the hinge shaft 9 side of the hinge 3 to move downward from the guide portion 27a of the reinforcing plate 27. Displaced to. Bent part 13
As the deformation progresses, the front energy absorbing portion 15 also deforms,
Eventually, it will look like Figure 4. Therefore, a sufficient impact absorption stroke can be secured by the displacement of the hinge 3 from FIG. 1 to FIG. can protect the head of

FIG. 5 is a graph showing reaction force characteristics.
(a) shows the reaction force characteristics in this example, and FIG. 5(b)
shows the reaction force characteristics when no bending part is provided. If a bent part is clearly provided, (a) is (b)
It can be seen that while the peak reaction force is significantly reduced compared to the above, the absorbed energy shown in the area surrounded by the diagram is large.

FIGS. 6 to 8 show modified examples of the bent portion. The bent portion 13A in FIG. 6 has a slit 13a in the center to facilitate deformation. In FIG. 7, the bent portion 13B is bent downward, and this bent portion 13B is installed so as to fit into the guide portion 27a of the reinforcing plate 27, and can be used more effectively than the guide function of the guide portion 27a. The bent portion 13C in FIG. 8 is bent both upward and downward, and it is possible to make the shock absorbing stroke larger.

FIGS. 9 and 10 show modified examples of the front energy absorbing section, and FIGS. 9(a) and 9(b) show the front energy absorbing section 15A having a through hole instead of a bent shape. . Therefore, this example has the same effect as the front energy absorbing part 15, and since there is no rearward deformation, it works together with the hook 11 and the lock hole 19 to more reliably restrict the rearward movement of the hood 1. can. Figure 10 (
The front energy absorbing portion 15B shown in a) and (b) is similarly not bent but has a notch. Therefore, in this example, in addition to achieving the same effect as the front energy absorbing portion 15A, the bending position can be regulated.

FIG. 11 shows another embodiment of the present invention, in which the variable support portion is constructed by a shear pin 37. That is, the rear end support part 7c of the mounting base part 7b is bent toward the inside of the rear end of the guide part 27a of the reinforcing plate 27, and is fixed by the shear pin 37 at the rear end of the guide part 27a. Note that a sealant 39 is applied between the reinforcing plate 27 and the mounting base portion 7b and between the hood ridge reinforcement 21. Further, in this example, the mounting base portion 7b is also provided with an elongated hole 41, which is covered with a waterproof sealing film 43. Then, as in FIG. 4(b), when the occupant's head H collides, the shear pin 37 breaks, and at the same time, the sealant 39 is also torn off, and sufficient energy is absorbed by the deformation of the mounting base portion 7b and the hood 1. In addition, in this example, when the hood 1 is deformed, the sealing film 43 is broken by the hook 11, and the hook 11 is pushed further downward through the elongated hole 41, so that a larger deformation stroke of the hood 1 can be secured, and the impact Alleviate.

FIG. 12 shows still another embodiment. In this embodiment, the bending portion 13B shown in FIG. 7 is used, and an L-shaped stopper 45 is fixed with a bolt and nut 29, and the tip of the stopper 45 is inserted into the bending portion 13B. Therefore, in this example, the stopper 45 can also restrict the retreat and upward floating of the hood 1.

Note that the present invention is not limited to the above embodiments. For example, the hood 1 can also be configured as a hood for a trunk provided at the front of the vehicle body. Also,
The support is not limited to a hinge, but can also be configured as a locking device.

[0025]

As is clear from the above, according to the structure of the present invention, the variable support section is displaced by a predetermined downward load from the upper surface of the hood, and the support is lowered, so that the impact absorption stroke of the hood can be improved by an extremely simple structure. and improve pedestrian safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view according to an embodiment of the present invention.

FIG. 3 is a perspective view of the same.

FIG. 4 is an action explanatory diagram.

FIG. 5 is an explanatory diagram of the action.

FIG. 6 is a perspective view of a modified example of the bent portion.

FIG. 7 is a perspective view of a modified example of the bent portion.

FIG. 8 is a perspective view of a modified example of the bent portion.

FIG. 9 is an explanatory diagram of a modification of the front energy absorption section.

FIG. 10 is an explanatory diagram of a modification of the front energy absorption section.

FIG. 11 is a sectional view according to another embodiment.

FIG. 12 is a sectional view according to still another embodiment.

FIG. 13 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1 Hood 1a Rear end 3 Hinge (support tool) 9 Hinge shafts 13, 13A, 13B, 13C Bent part (variable support part) 37 Shear pin (variable support part)

Claims (1)

[Claims] Claim 1: A variable support part is provided in a support that supports the rear end of a hood in the longitudinal direction of the vehicle body toward the vehicle body side for opening and closing the front part of the vehicle body, and the variable support part is displaced by a predetermined downward load from the top surface of the hood. A food support device characterized by lowering ingredients.