JP2013241136A - Hood flip-up structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle hood flip-up structure configured to reliably transmit a hood flip-up force applied by an actuator to a hood, while preventing a rod of the actuator from departing along a slope surface, even if a point of application of the hood flip-up force by the actuator is located on the slope surface of the hood inner due to layout of an engine room.SOLUTION: A hood 5 includes a hood outer 5A and a hood inner 5B. The hood inner 5B has a slope surface 5C which is raised higher toward a vehicle width direction near a portion in contact with the actuator 31. On the lower surface of the hood inner 5B, a regulating portion 49 is formed, which regulates, when the actuator 31 extends, a part of the actuator 31 in contact with the hood 5 from being displaced in the vehicle width direction along the sloped surface 5C.

Description

  In the present invention, a pedestrian who collides with a vehicle by causing an actuator provided on the side of the hood opening of the vehicle body to extend upward at the time of detecting an impact from the front of the vehicle to jump up the upper hood (consent with the hood). The present invention relates to a vehicle hood flip-up structure that accepts obstacles such as the above.

Conventionally, when an obstacle such as a pedestrian comes into contact with the front part of a vehicle and the obstacle falls on a hood that covers the upper surface of the engine room, the impact received by the obstacle is reduced by deforming the hood. Has been done.
If the installation height of the hood is low and a sufficient distance cannot be ensured between the hood and the upper surface of the engine or the like in the engine room, the above-mentioned impact mitigation function cannot be sufficiently exhibited. there is a possibility.

In order to solve such a problem, an actuator for lifting the rear part of the hood is provided around the hinge mechanism provided at the rear part of the hood, and the actuator is operated when an impact is detected from the front of the vehicle. A vehicle hood flip-up structure has been already proposed in which the function of reducing the impact received by an obstacle such as a pedestrian is sufficiently exhibited (see Patent Document 1). .
In the vehicle hood flip-up structure as described above, the actuator is arranged in the engine room, and the arrangement position of the actuator considers the contact position with the hood in order to lift the hood appropriately. There is a need.

  On the other hand, in order to ensure the rigidity of the hood described above, a closed space is generally formed by the hood inner and the hood outer, and the contact position between the hood inner and the rod of the actuator is If it coincides with the part (inclined surface) that inclines in the vehicle width direction, when the rod tip abuts against the inclined surface when the actuator is activated, the rod is displaced in the vehicle width direction along the inclined surface. There is a risk that the hood jumping power may be lost.

The above-mentioned problem can be solved by considering the contact position between the actuator rod and the hood in advance at the stage of designing the engine room or hood of the vehicle. The distance between the engine and the engine auxiliary equipment, that is, the shock mitigation stroke due to the obstacle was secured, and the setting of the flip-up mechanism was not assumed, but the engine specification change and hood design specification change thereafter For example, if it is necessary to add a hood flip-up mechanism later to provide an impact mitigation stroke, the layout of the equipment in the engine room can be adjusted to ensure the proper positional relationship between the actuator and the inclined surface of the hood inner. It may be necessary to review the hood structure.
The above-mentioned Patent Document 1 does not disclose or suggest the relationship between the shape of the hood inner and the appropriate hood flip-up.

JP 2010-30696 A

  Therefore, the present invention includes a hood composed of a hood outer and a hood inner, the hood inner has an inclined surface whose position increases in the vehicle width direction in the vicinity of the portion that contacts the actuator, and the lower surface of the hood inner By providing a restricting portion that restricts the contact portion of the actuator with the hood from moving in the vehicle width direction along the inclined surface when the actuator is extended, due to the layout in the engine room, it depends on the actuator. Even when the hood flip-up action point is located on the inclined surface of the hood inner, the hood jump-up force by the actuator can be reliably transmitted to the hood, and the rod of the actuator does not deviate along the inclined surface. The purpose is to provide a hood flip-up structure.

  The vehicle hood flip-up structure according to the present invention is a vehicle hood jump-up structure in which an actuator provided on the side of the hood opening of the vehicle body is extended upward when an impact is detected from the front of the vehicle, so that the upper hood is flipped up. The hood is composed of a hood outer and a hood inner, and the hood inner has an inclined surface whose position increases in the vehicle width direction in the vicinity of a portion that contacts the actuator. The lower surface of the inner is provided with a restricting portion that restricts displacement of the contact portion of the actuator with the hood along the inclined surface in the vehicle width direction when the actuator is extended.

According to the above configuration, since the above-described restricting portion is provided on the lower surface of the hood inner, even if the hood flip-up action point by the actuator is located on the inclined surface of the hood inner due to the layout in the engine room. The above-mentioned restricting portion can restrict the contact portion of the actuator with the hood from being displaced in the vehicle width direction along the inclined surface, and the hood jumping force by the actuator can be reliably transmitted to the hood. And the actuator rod does not deviate along the inclined surface.
Therefore, a sufficient jumping force of the hood by the actuator can be ensured, and a buffering effect against the obstacle can be obtained.

  In one embodiment of the present invention, at the position overlapping the inclined surface on the lower surface of the hood inner, there is a surface portion with which the upper end of the extension portion of the actuator abuts and a bent portion bent downward from the surface portion. A reinforcing part is provided, and the bent part constitutes the restricting part.

  According to the above configuration, the hood jumping action point in the hood inner can be reinforced by the reinforcing portion, so that the hood jumping force by the actuator can be more reliably transmitted to the hood.

  In one embodiment of the present invention, the inclined surface is higher in position toward the vehicle outer side, and the bent portion is formed by bending the outer edge in the vehicle width direction of the reinforcing portion.

  According to the above configuration, while the reinforcing portion reinforces the action point of the hood inner, the contact portion of the actuator with the hood is displaced outward in the vehicle width direction along the inclined surface. The outer edge in the vehicle width direction can be regulated by a bent portion formed by bending downward, and the hood flip-up force by the actuator can be more reliably transmitted to the hood.

  In one embodiment of the present invention, the actuator is fixed to a vehicle inner side surface of an apron reinforcement extending in the vehicle front-rear direction at a hood opening side portion of the vehicle body by a bracket that covers the actuator from the vehicle inner side, The upper end of the extended portion of the actuator corresponds to the position of the inclined surface.

The above configuration has the following effects.
In other words, in order to prevent the rotational moment from being generated as much as possible when the actuator is operated, the actuator is fixed as close as possible to the apron reinforcement, and the actuator that reliably receives the reaction force at the time of actuator operation with the apron reinforcement. It is possible to restrict the displacement of the actuator rod in the vehicle width direction along the inclined surface of the hood inner while satisfying the layout needs.
That is, it can be reliably received by the apron reinforcement of the reaction force when the actuator is operated, and the hood jumping force by the actuator can be reliably transmitted to the hood.

  In one embodiment of the present invention, the hood inner is made of light metal, and has a shape in which the edge in the vehicle width direction is in contact with the hood outer and is spaced downward from the hood outer at a portion inside the edge. is there.

The above configuration has the following effects.
In other words, if light metal hood inners are used due to the need for lighter vehicles and reduced yaw moment of inertia, light metal hood inners have lower rigidity and poor formability compared to steel plate ones. As a result, the corner portion of the hood inner part tends to be located on the inside of the hood in the vehicle width direction, and as a result, the problem of the actuator rod twisting outward in the vehicle width direction tends to occur. However, the hood jumping force can be reliably transmitted to the hood.
That is, the hood jumping force of the actuator can be reliably transmitted to the hood while reducing the weight of the front portion of the vehicle and reducing the yaw moment of inertia.

  According to the present invention, the hood inner and the hood inner are provided with a hood, and the hood inner has an inclined surface whose position increases in the vehicle width direction in the vicinity of the portion in contact with the actuator. When the actuator is extended, there is a restricting portion that restricts the contact portion of the actuator with the hood from being displaced in the vehicle width direction along the inclined surface. Even when the hood flip-up action point is located on the inclined surface of the hood inner, there is an effect that the hood jump-up force by the actuator can be reliably transmitted to the hood.

External perspective view of a vehicle provided with a hood flip-up structure of the present invention A perspective view showing the engine room viewed from above with the hood opened FIG. 2 is a cross-sectional view taken along the line AA in FIG. Top view of the hood with the hood outer removed XX line view of FIG. Side view when the hood is raised The principal part expansion perspective view of FIG. Partial enlarged perspective view of FIG. A perspective view showing the actuator and bracket as viewed from the inside in the vehicle width direction A perspective view showing the actuator and the bracket viewed from the outside in the vehicle width direction The expanded perspective view which shows the principal part of FIG. 4 in the state seen from upper direction FIG. 4 is an enlarged perspective view showing the main part of FIG. 4 as viewed from below. Side view showing the bent state of the hood during a frontal collision of the vehicle 11A is a cross-sectional view taken along line BB in FIG. 11, FIG. 11B is a cross-sectional view taken along line CC in FIG. 11, and FIG. 11C is a cross-sectional view taken along line DD in FIG. Front view when the hood is flipped up by the actuator

  Due to the layout in the engine room, even if the hood flip-up action point by the actuator is located on the inclined surface of the hood inner, the purpose of reliably transmitting the hood jump-up force by the actuator to the hood In the hood flip-up structure of the vehicle, the actuator provided on the hood opening side of the hood is extended upward when an impact is detected from the front of the vehicle, and the hood is lifted from the hood outer and the hood inner. The hood inner has an inclined surface whose position increases in the vehicle width direction in the vicinity of a portion that contacts the actuator, and the lower surface of the hood inner The contact part of the hood is displaced in the vehicle width direction along the inclined surface. It was realized by the configuration of providing the regulation portion for regulating.

An embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an external perspective view of a vehicle provided with a hood flip-up structure, and FIG. 2 is a perspective view showing the engine room viewed from above with the hood opened.
The engine room 1 is covered with front fender panels 2 and 2 on both left and right sides, a front part with a bumper face 3, a rear part with a dash lower panel 4, and an upper part with a hood 5 (which agrees with the hood).

  The engine room 1 is provided with suspension tower portions 6 and 6 that bulge inward in the vehicle width direction from both left and right sides and extend in the vertical direction. 8. Engine and engine accessories such as a brake booster 13 having an air cleaner 9, a washer tank 10, a master cylinder 11 and a reservoir tank 12 are disposed, and a large number of ducts, piping, and harnesses are arranged. The location where an actuator 31 for raising the hood, which will be described later, is provided is limited. In FIG. 2, 14 is a cowl grill.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. The hood 5 is composed of a hood outer 5A and a hood inner 5B, and is used for reducing the vehicle weight and reducing the yaw moment of inertia. The hood outer 5A and the hood inner 5B are made of a light metal (or light alloy) such as aluminum, and hemming is performed on the peripheral joint portion including the vehicle width direction edge between the hood outer 5A and the hood inner 5B. The hood outer 5A and the hood inner 5B are integrated with a closed space formed between the 5B. That is, the vehicle width direction edge of the hood inner 5B is in contact with the hood outer 5A. That is, the vehicle width direction edge of the hood inner 5B is in contact with the hood outer 5A.
As shown in FIG. 3, the hood inner 5B is configured to be spaced downward from the hood outer 5A at a portion inside the edge as a hemming portion.
FIG. 4 is a plan view of the hood with the hood outer 5A removed, and FIG. 5 shows a hinge structure for supporting the hood 5 as viewed in the direction of arrows XX in FIG.

In FIG. 3, a vertical wall 2b extending downward from the upper end 2a of the front fender panel 2 is integrally bent, and a mounting piece 2c extending inward in the vehicle width direction from the lower end of the vertical wall 2b is integrally folded. Bending is formed.
An apron reinforcement 20 is provided at the lower part of the mounting piece 2c, and both side portions in the engine room 1 extend in the front-rear direction of the vehicle. A side cowl reinforcement is provided outside the apron reinforcement 20 in the vehicle width direction. Mention 21 is joined and fixed. The apron reinforcement 20 and the side cowl reinforcement 21 described above are vehicle body strength members.

As shown in FIGS. 4, 5, and 6, the hood 5 can be displaced upward between the rear end portion of the hood inner 5 </ b> B and the upper end horizontal portion 20 a (see FIG. 3) of the apron reinforcement 20. A hinge mechanism 22 is provided.
As shown in FIGS. 5 and 6, the hinge mechanism 22 includes an L-shaped body side hinge bracket 23 fixed to the upper end horizontal portion 20 a of the apron reinforcement 20 and a lower surface of the rear end portion of the hood inner 5 </ b> B. A fixed L-shaped hood-side hinge bracket 24; a long link 27 stretched between the front portion of the hood-side hinge bracket 24 and the body-side hinge bracket 23 using pins 25 and 26; Between the rear part of the hood side hinge bracket 24 and the intermediate part of the link 27 in the front-rear direction, a short link 30 stretched using pins 28 and 29 is provided.
That is, the above-described hood 5 is fixed to the apron reinforcement 20 as a vehicle body at the rear portion thereof via a hinge mechanism 22 that can be displaced upward. When the hood 5 is normally opened and closed, the links 27 and 30 are connected to each other. While maintaining the state of FIG. 5, the hood 5 is opened and closed with the pin 26 as a fulcrum.

On the other hand, when an impact from the front of the vehicle is detected, the links 27 and 30 are displaced as shown in FIG. 6 by the action of an actuator 31 described later, and the free end of the link 27 moves upward with the pin 26 as a fulcrum. Is configured to ensure a so-called pop-up state.
5 and 6 show the hinge mechanism 22 on the right side of the vehicle, the hinge mechanism on the left side of the vehicle is configured symmetrically with that on the right side, and the hood 5 is so-called flip-up type hood by the left and right hinge mechanisms 22 and 22. It is made.
As shown in FIG. 2 and FIG. 7, an actuator 31 that flips the rear part of the hood 5 upward when an impact from the front of the vehicle is detected is provided. The actuator 31 is provided on the hood opening side part of the vehicle body (inside the apron reinforcement 20). (Refer to the side surface) and located in front of the vehicle with respect to the hinge mechanism 22 described above.

FIG. 8 is a perspective view showing a mounting structure of the actuator 31. As shown in FIGS. 5, 6, and 8, the actuator 31 is provided with an apron reinforcement 20 that extends in the vehicle front-rear direction at the hood opening side portion of the vehicle body. It is being fixed with respect to the vehicle inner side surface by the bracket 32 which covers the actuator 31 from the vehicle inner side.
As shown in FIGS. 9 and 10, the bracket 32 includes an outer cylinder coupling portion 32 b that couples a cylinder, which is an outer cylinder of the actuator 31, at a plurality of (three in this embodiment) welded portions 32 a. The extending portion 32c extending forward from the outer cylinder coupling portion 32b and the mounting seats 32d and 32e positioned above and below the front portion of the extending portion 32c are integrally formed of a metal rigid member.

As shown in FIGS. 5, 6 and 8, the mounting seats 32d and 32e of the bracket 32 are fixed to the inside surface of the apron reinforcement 20 using fastening members such as bolts 33 and nuts. It is.
The above-described actuator 31 includes an inflator (not shown) in its interior, and when an impact is detected from the front of the vehicle, the rod 34 (see FIG. 6) is extended upward by the operation of the inflator. The hood 5 is configured to jump up. Here, the actuator 31 is mounted such that its longitudinal direction is directed in the vertical direction.

  5, 6, 8, 9, and 10 show the actuator 31 and the bracket 32 on the right side of the vehicle and the mounting structure thereof, but the actuator, the bracket and the mounting structure on the left side of the vehicle are configured symmetrically with those on the right side. Has been.

As shown in FIGS. 4, 11, and 12, the hood 5 bends forward from the position corresponding to the actuator 31 of the hood inner 5 </ b> B so that the hood 5 protrudes upward due to the load applied from the front at the time of the vehicle front collision ( (Refer FIG. 13) The bending part (alpha) is formed.
4, FIG. 11 and FIG. 12, for convenience of illustration, the fold portion α described above is shown by an imaginary line. Specifically, the hood 5 can be easily broken by forming irregularities on the hood inner 5B. The bent portion α is formed by bending the hood 5 so as to protrude upward as indicated by a virtual line in FIG. It is intended to prevent damage.
The bent portion α is formed over substantially the entire width of the hood inner 5B in the vehicle width direction.

As shown in FIGS. 4, 11, and 12, a steel hinge rain 40 (details) extending from a portion (hinge fixing portion) fixed by the hinge mechanism 22 in the hood 5 to a position ahead of the above-described folding portion α. (Hinge reinforcement) is provided.
The hinge rain 40 receives an upward load (vertical load) from the actuator 31 when the rod 34 of the actuator 31 extends.

  As shown in FIG. 11, the hinge rain 40 described above has a flat surface portion 40a facing the hood inner 5B at the front portion and the rear portion from the folding portion α, and is more than the folding portion α in the surface portion 40a. It is fixed to the hood inner 5B at at least two locations, the front portion and the rear portion.

As shown in FIGS. 4, 11, and 12, the front portion of the fold portion α of the surface portion 40 a is fixed to the hood inner 5 </ b> B by the rivet 41, and the rear portion of the fold portion α of the surface portion 40 a is The bolt 42 and the nut 43 are fixed to the hood inner 5B.
In addition to the above-described two locations with the rivet 41, the bolt 42, and the nut 43, the rear portion of the surface portion 40a has three hoods using bolts, nuts 44, 45, and 46 as shown in FIGS. It is fixed to the inner 5B, and two of these, which are closer to the rear, are fixed together with the hood-side hinge bracket 24 of the hinge mechanism 22 by the bolts and nuts 45 and 46 described above.

14A is a cross-sectional view taken along line BB in FIG. 11, FIG. 14B is a cross-sectional view taken along line CC in FIG. 11, and FIG. 14C is a cross-sectional view taken along line D- in FIG. It is D line arrow sectional drawing.
As shown in FIGS. 14 (a), 14 (b), and 14 (c), the hinge rain 40 described above is folded inwardly in the vehicle width direction and upward from the vehicle width direction inner end portion of the surface portion 40a. The bent portion 40b and an outer bent portion 40c bent in the vehicle width direction outward and upward from the vehicle width direction outer end portion of the surface portion 40a are integrally formed.
From (a) in FIG. 14 showing a cross section of the front portion of the above-described folded portion α to (b) in FIG. 14 showing a cross section of the rear portion of the folded portion α, the vertical length of the above-described bent portion 40b is set. By changing, the rigidity changing portion 47 (see FIG. 11) is formed.

  The rigidity changing portion 47 changes the rigidity with respect to a load (front-rear direction load) applied to the hood 5 from the front at a position corresponding to the bent portion α. In this embodiment, the rigidity changing portion 47 is located at the front portion of the bent portion α. The vertical length L2 of the bent portion 40b (see FIG. 14a) is larger than the vertical length L1 of the bent portion 40b (see FIG. 14b) at the rear portion of the bent portion α. A relational expression of L2> L1 is established, and the hinge rain 40 does not prevent the hood 5 from being bent at the time of frontal collision of the vehicle. It is configured so that it can be appropriately bent so as to be convex upward.

3 is a front view when the actuator 31 is not operated (normal state), FIG. 15 is a front view when the actuator 31 is operated (when the hood is flipped up), and the hood inner 5B is connected to the rod 34 of the actuator 31. In the vicinity of the abutting portion, it has an inclined surface 5C having an inner, outer, outer, and outer shape whose position increases toward the outer side in the vehicle width direction.
Here, because of the layout of the engine 7 and the engine accessories and other devices in the engine room 1 shown in FIG. 2, the hood jumping action point by the actuator 31 is positioned on the inclined surface 5C of the hood inner 5B. Yes.

  As shown in FIG. 3 and FIG. 15, at the position overlapping the inclined surface 5 </ b> C in the vertical direction on the lower surface of the hood inner 5 </ b> B, a surface portion 48 with which the upper end of the rod 34 that is an extension portion of the actuator 31 abuts, A steel stiffener 50 is provided as a reinforcing portion having a bent portion 49 bent downward from the surface portion 48, and the bent portion 49 of the stiffener 50 constitutes a restricting portion.

  When the rod 34 of the actuator 31 is extended, the restricting portion (the bent portion 49 of the stiffener 50) is such that the contact portion of the actuator 31 with the hood inner 5B, that is, the upper end of the rod 34 is along the inclined surface 5C. Thus, displacement to the outside in the vehicle width direction is restricted. Here, the bent portion 49 is formed by bending the outer edge of the stiffener 50 in the vehicle width direction downward, while the rod 34, which is an extension portion of the actuator 31, is formed on the inclined surface of the hood inner 5B. This corresponds to the position of 5C.

As shown in FIGS. 11 and 12, the stiffener 50 as the reinforcing portion is placed at a position where it does not overlap with the above-described fold portion α so as not to prevent the fold 5 from protruding above the hood 5 at the time of the vehicle front collision. It is fixed to the lower surface of the hood inner 5B.
In this embodiment, the stiffener 50 is fastened together with the hinge rain 40 at a plurality of front and rear locations (two locations in this embodiment) by using bolts 42, nuts 43 and bolts and nuts 44.
In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inward in the vehicle width direction, arrow OUT indicates the outward in the vehicle width direction, and arrow UP indicates the upper side of the vehicle. Indicates.

The illustrated embodiment is configured as described above, and the operation will be described below.
As shown in FIGS. 4, 11, and 12, the hood 5 of the hood 5 is bent so as to be convex upward by a load (front-rear direction load) applied from the front at the time of a vehicle frontal collision. The folded portion α is formed, the hinge rain 40 is formed with the above-described rigidity changing portion 47, and the stiffener 50 is provided at a position spaced rearward from the folded portion α.
Therefore, the hinge lane 40 and the stiffener 50 do not hinder the hood from being bent at the time of a frontal collision of the vehicle, and the hood 5 protrudes upward as shown in FIG. The hood 5 can be prevented from retreating.

In this embodiment, as shown in FIG. 13, the front fold portion β is formed in the hood inner 5 </ b> B in front of the above-described fold portion α and further forward than the front end of the hinge rain 40. As shown in the figure, the hood 5 is bent into a substantially trapezoidal shape when viewed from the side, so that the hood 5 is prevented from retreating more appropriately.
Further, in the hood inner 5B of the hood 5 described above, a hinge rain 40 extending from the fixed portion of the hinge mechanism 22 to a position ahead of the bent portion α is provided, and the upper end portion of the rod 34 of the actuator 31 is provided on the inclined surface 5C of the hood inner 5B. A restricting portion (see the bent portion 49 of the stiffener 50) that restricts displacement along the vehicle width direction (in this embodiment, outward in the vehicle width direction) is provided.

Therefore, at the time of detecting an impact when an obstacle such as a pedestrian is in contact with the front part of the vehicle, the inflator in the actuator 31 is operated to extend the rod 34 of the actuator 31 upward as shown in FIG. The rear part of the hood 5 is flipped upward through the mechanism 22 as shown in FIG.
At this time, the hood 5 can be prevented from being bent by the hinge rain 40 due to the bent portion α of the hood 5, and the rod 34 of the actuator 31 can be prevented from deviating outward in the vehicle width direction along the inclined surface 5C of the hood inner 5B. As a result, it is possible to secure a sufficient jumping force and a jumping amount of the hood 5 by the rod 34 of the actuator 31 and to sufficiently reduce the impact against the obstacle.

  Thus, in the vehicle hood flip-up structure of the above embodiment, the actuator 31 provided on the side of the hood opening of the vehicle body (see the side surface of the apron reinforcement 20) is moved upward when an impact is detected from the front of the vehicle. A hood flip-up structure for a vehicle in which the hood 5 is lifted up by extending the hood. The hood 5 includes a hood outer 5A and a hood inner 5B, and the hood inner 5B contacts the actuator 31. An inclined surface 5C whose position increases in the vehicle width direction in the vicinity of the part is provided. On the lower surface of the hood inner 5B, when the actuator 31 is extended, a contact portion of the actuator 31 with the hood 5 is provided. A restricting portion (see the bent portion 49 of the stiffener 50) for restricting displacement in the vehicle width direction along the inclined surface 5C is provided. Those with (see Figure 15).

According to this configuration, since the above-described restricting portion (the bent portion 49 of the stiffener 50) is provided on the lower surface of the hood inner 5B, the hood flip-up action point by the actuator 31 is the hood jumping action point due to the layout in the engine room 1. Even when it is located on the inclined surface 5C of the inner 5B, the contact portion of the actuator 31 with the hood 5 is displaced in the vehicle width direction along the inclined surface 5C. 49), the hood jumping force by the actuator 31 can be reliably transmitted to the hood 5, and the rod 34 of the actuator 31 does not deviate along the inclined surface 5C.
Therefore, a sufficient jumping force of the hood 5 by the actuator 31 can be ensured, and a buffering effect against an obstacle can be obtained.
Further, at the position overlapping the inclined surface 5C on the lower surface of the hood inner 5B, there is a reinforcement having a surface portion 48 with which the upper end of the extended portion of the actuator 31 abuts and a bent portion 49 bent downward from the surface portion 48. A portion (see stiffener 50) is provided, and the bent portion 49 constitutes the restricting portion (see FIG. 15).

According to this configuration, since the hood flip-up action point in the hood inner 5B can be reinforced by the reinforcing portion (see the stiffener 50), the hood jump-up force by the actuator 31 can be transmitted more reliably.
Further, the inclined surface 5C has a higher position toward the vehicle outer side, and the bent portion 49 is formed by bending the outer edge in the vehicle width direction of the reinforcing portion (stiffener 50) (see FIG. 15). ).

According to this configuration, while the reinforcing portion (stiffener 50) reinforces the flip-up action point of the hood inner 5B, the contact portion of the actuator 31 with the hood 5 extends outward in the vehicle width direction along the inclined surface 5C. Displacement can be restricted by a bent portion 49 formed by bending the outer edge in the vehicle width direction of the reinforcing portion (stiffener 50) downward, and the hood jumping force by the actuator 31 is more reliably applied to the hood 5. Can be communicated to.
In addition, the actuator 31 is fixed to a vehicle inner side surface of the apron reinforcement 20 extending in the vehicle front-rear direction at the hood opening side portion of the vehicle body by a bracket 32 that covers the actuator 31 from the vehicle interior side. The upper end of the extended portion corresponds to the position of the inclined surface 5C (see FIGS. 8 and 15).

This configuration has the following effects.
In other words, in order to prevent the actuator 31 from generating a rotational moment as much as possible when the actuator 31 is operated, the actuator 31 is fixed as close as possible to the apron reinforcement 20, and the apron reinforcement 20 ensures the reaction force when the actuator is operated. The above-described restricting portion (the bent portion 49 of the stiffener 50) restricts the rod 34 of the actuator 31 from being displaced in the vehicle width direction along the inclined surface 5C of the hood inner 5B while satisfying the actuator layout needs. be able to.
That is, the reaction force apron reinforcement 20 when the actuator is actuated can be reliably received and the hood jumping force by the actuator 31 can be reliably transmitted to the hood 5.
Furthermore, the hood inner 5B is made of light metal and has a shape in which the edge in the vehicle width direction is in contact with the hood outer 5A and is spaced downward from the hood outer 5B at a portion inside the edge (see FIG. 3, see FIG.

This configuration has the following effects.
In other words, when the light metal hood inner 5B is used due to the need for weight reduction of the vehicle and the reduction of the yaw moment of inertia, the light metal hood inner 5B has lower rigidity and poor formability than those made of iron plate. Due to the formability, the corner portion downward of the hood inner 5B tends to be located on the inner side in the vehicle width direction of the hood 5, and thus, the problem of twisting the rod 34 of the actuator 31 outward in the vehicle width direction is likely to occur. Even in such a case, the hood jumping force can be reliably transmitted to the hood 5.
That is, the hood flip-up force of the actuator 31 can be reliably transmitted to the hood 5 while reducing the weight of the front portion of the vehicle and reducing the yaw moment of inertia.

  Further, as disclosed in the embodiment, when the hinge rain 40 that extends from the hinge fixing portion of the hood 5 to the front position from the bent portion α and receives the upward load from the actuator 31 when the actuator 31 is extended is provided. The hood 5 can be prevented from being bent by the hinge rain 40 when the actuator 31 extends in the fold portion α of the hood 5, and as a result, the hood 5 can be sufficiently jumped up by the actuator 31. The function of mitigating the impact received by the obstacle can be sufficiently exhibited.

  Furthermore, as disclosed in the embodiment, the hinge rain 40 has the above-described surface portion 40a facing the hood 5, and the surface portion 40a is fixed to the hood 5 in surface contact with the front portion and the rear portion with respect to the folded portion α. The structure of the hood 5 is strong against the force from below by the actuator 31, and the hood 5 can be more reliably prevented from being broken by the hinge rain 40 by the actuator 31 extending operation. A jumping force can be secured, and an impact mitigation function can be improved by raising the hood 5.

In addition, as disclosed in the above embodiment, the hinge rain 40 has a structure including a rigidity changing portion 47 in which the rigidity is changed with respect to a load applied to the hood 5 from the front at a position corresponding to the bent portion α. Employment has the following effects.
That is, the rigidity changing portion 47 changes the rigidity of the hinge rain 40 with respect to the load applied to the hood 5 from the front (front-rear direction load). ) To prevent the hood 5 from being bent by the rigidity changing portion 47 so that the hinge rain 40 does not hinder the hood 5 from being bent, and the hood 5 is projected upward in the vehicle front collision. Can be appropriately bent (see FIG. 13).

In the correspondence between the configuration of the present invention and the above-described embodiment,
The restricting portion of the present invention corresponds to the bent portion 49 of the stiffener 50 of the embodiment,
Similarly,
The reinforcement part corresponds to the stiffener 50,
The present invention is not limited to the configuration of the above-described embodiment.
For example, in the above-described embodiment, the configuration in which the position increases toward the outer side in the vehicle width direction as the inclined surface 5C of the hood inner 5B has been illustrated. Therefore, the present invention may be applied to a structure whose position is increased.

  As described above, the present invention relates to a vehicle hood flip-up structure in which the actuator provided on the hood opening side portion of the vehicle body is extended upward at the time of detecting an impact from the front of the vehicle to jump up the hood above it. Useful.

5 ... Hood 5A ... Hood outer 5B ... Hood inner 5C ... Inclined surface 20 ... Apron reinforcement 31 ... Actuator 32 ... Bracket 48 ... Surface portion 49 ... Bent portion (regulating portion)
50 ... Stiffener (reinforcement part)

Claims (5)

A hood flip-up structure for a vehicle in which an actuator provided on a hood opening side portion of a vehicle body is extended upward when an impact is detected from the front of the vehicle, and the upper hood is flipped up.
The hood is composed of a hood outer and a hood inner,
The hood inner has an inclined surface whose position increases in the vehicle width direction in the vicinity of the portion that contacts the actuator,
On the lower surface of the hood inner, a hood jumping up of the vehicle is provided, which is provided with a restricting portion that restricts the contact portion of the actuator with the hood from moving in the vehicle width direction along the inclined surface when the actuator is extended. Construction. At the position overlapping the inclined surface on the lower surface of the hood inner, a reinforcing portion having a surface portion with which the upper end of the extension portion of the actuator abuts and a bent portion bent downward from the surface portion is provided,
The hood flip-up structure for a vehicle according to claim 1, wherein the bent portion constitutes the restricting portion. The inclined surface has a higher position toward the outside of the vehicle,
3. The vehicle hood flip-up structure according to claim 2, wherein the bent portion is formed by bending the outer edge of the reinforcing portion in the vehicle width direction. The actuator is fixed by a bracket that covers the actuator from the vehicle inner side to the vehicle inner side surface of the apron reinforcement that extends in the vehicle longitudinal direction at the hood opening side portion of the vehicle body,
The hood flip-up structure for a vehicle according to any one of claims 1 to 3, wherein an upper end of an extended portion of the actuator corresponds to a position of the inclined surface. The hood inner is made of light metal, its edge in the vehicle width direction is in contact with the hood outer,
The hood flip-up structure for a vehicle according to any one of claims 1 to 4, wherein the hood flip-up structure for a vehicle according to any one of claims 1 to 4, wherein the hood flip-up structure is configured to be spaced downward from the hood outer at a portion inside the edge.

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