Vehicle hood

Abstract

To reduce impactive force when colliding with a pedestrian while securing the opening-closing durability of a hood.SOLUTION: A vehicular hood 20 includes an outer panel and an inner panel 22. At an edge of the inner panel 22, an outer circumference skeleton bead 30 that extends in a direction along an external shape of the inner panel 22 in a groove-shaped cross section is formed over a range from a front section 22f to a curved section 22c. At the outer circumference skeleton bead 30 of the front section 22f, a plurality of strength reduced sections 32 that have smaller width and height than those of a general section 31 in the groove-shaped cross section are formed with intervals in a vehicle widthwise direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vehicle hood structure that opens and closes a front compartment at the front of the vehicle. [Background technology]

[0002] A vehicle hood, which opens and closes the front compartment at the front of the vehicle, has its rear end rotatably attached to the body and the front end is moved up and down to open and close the front compartment. The front end of this hood is subjected to an impact force when the hood is closed, so it is required to have a durable strength capable of withstanding this impact force.

[0003] On the other hand, when a pedestrian collides with the front part of the vehicle, the hood is required to collapse and absorb the impact force of the collision.

[0004] For this reason, a structure has been proposed in which a slit extending in the vehicle front-to-rear direction or diagonally is provided in the front or diagonally forward direction of an inner panel constituting the hood to absorb impact force (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-93639 A Summary of the Invention [Problem to be solved by the invention]

[0006] Meanwhile, in recent years, there has been a demand for improved protection of the legs of pedestrians when a vehicle collides with a pedestrian. In the conventional technology described in Patent Document 1, in order to increase the amount of impact force absorption in the event of a pedestrian collision, it is necessary to increase the number of slits. However, there is a problem in that increasing the number of slits reduces durability against the impact force applied to the front end of the hood when closing the hood.

[0007] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to reduce the impact force in the event of a pedestrian collision while ensuring the durability of the hood when it is opened and closed. [Means for solving the problem]

[0008] The vehicle hood of the present invention is a vehicle hood that is composed of an outer panel that constitutes a design surface, and an inner panel that is fixed to the surface of the outer panel opposite to the design surface, and the rear end of the inner panel is rotatably attached to the body to open and close a front compartment at the front of the vehicle, the inner panel includes a front portion, a side portion, and a curved portion that connects the front portion and the side portion, and a peripheral skeleton bead is formed on the edge of the inner panel from the front portion to the curved portion, the peripheral skeleton bead having a groove-shaped cross section that is convex toward the opposite side to the outer panel and extending in a direction along the outer shape of the inner panel, before The peripheral skeleton bead teeth, Channel cross section a general portion extending in a direction along the outer shape of the inner panel; The width and height The above Smaller than the general section A groove-shaped cross section extends in a direction along the outer shape of the inner panel. Decreased strength part The general portion and the reduced strength portion are in a direction along the outer shape of the inner panel. To Alternating arrangement It is characterized by the fact that

[0009] In this way, by providing the outer peripheral skeleton bead with the weakened portion, the hood will bend and deform from the weakened portion in the event of a pedestrian collision, absorbing the impact force and reducing the impact force in the event of a pedestrian collision. In addition, since no slits are provided in the inner panel, durability when the hood is opened and closed can be ensured.

[0010] In the hood of the vehicle of the present invention, The general section is Extends along the outer shape of the inner panel General section An outer edge and the General section The vehicle is located behind the outer ridge line or at the center of the vehicle width direction. General section Extends parallel to the outer edge General section and an inner ridge line, and the reduced strength portion includes The vehicle has a central portion and a connection portion connecting the central portion and the general portion, the central portion including a central portion outer ridgeline that is disposed on the outer side of the inner panel relative to the general portion outer ridgeline and extends along the outer shape of the inner panel, and a central portion inner ridgeline that is on the outer side of the inner panel relative to the general portion inner ridgeline and extends parallel to the central portion outer ridgeline at a position rearward of the vehicle relative to the central portion outer ridgeline or at a position toward the center in the vehicle width direction, and the connection portion includes a connection portion outer ridgeline that extends obliquely downward from the central portion outer ridgeline toward the general portion outer ridgeline, and a connection portion inner ridgeline that extends obliquely downward from the central portion inner ridgeline toward the general portion inner ridgeline. Good too.

[0011] This reduces the strength of the inner peripheral side ridge of the outer peripheral skeleton bead, thereby reducing the impact force. Effect of the Invention

[0014] The present invention can reduce the impact force in the event of a pedestrian collision while ensuring the durability of the hood when it is opened and closed. [Brief description of the drawings]

[0015] [Figure 1] 1 is a partial cross-sectional elevation view showing a front portion of a vehicle to which a hood of an embodiment is attached. [Diagram 2] 2 is a plan view of the inner panel of the hood according to the embodiment, taken along the line AA in FIG. 1 as viewed from below. [Diagram 3] 3 is an enlarged plan view of the front part of the hood shown in FIG. 2, seen from below with the hood closed, taken along the line AA shown in FIG. [Figure 4] 3 is an enlarged perspective view of the front portion of the hood shown in FIG. 2, as viewed from below with the hood closed. FIG. [Diagram 5] FIG. 5 is an upright sectional view obtained by turning the BB section shown in FIGS. [Figure 6] FIG. 5 is an upright sectional view obtained by turning the CC section shown in FIGS. [Figure 7] The cross section taken along the line DD shown in Figs. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the hood 20 of the vehicle 10 of the embodiment will be described with reference to the drawings. The arrows FR, UP, and RH shown in each drawing indicate the forward direction (traveling direction), upward direction, and rightward direction of the vehicle 10, respectively. The opposite directions of the arrows FR, UP, and RH indicate the rearward direction, downward direction, and leftward direction of the vehicle. Hereinafter, when the directions of front-rear, left-right, and up-down are simply used in the description, they refer to front-rear in the front-rear direction of the vehicle, left-right in the left-right direction of the vehicle (vehicle width direction), and up-down in the up-down direction of the vehicle, unless otherwise specified.

[0017] As shown in FIG. 1, the hood 20 is composed of an outer panel 21 that constitutes a design surface 21a, and an inner panel 22 that is fixed to a back surface 21b opposite the design surface 21a of the outer panel 21, and the rear end of the inner panel 22 is rotatably attached to the body 11 of the vehicle 10 to open and close the front compartment 12 at the front of the vehicle.

[0018] As shown in Fig. 2, the inner panel 22 includes a front portion 22f, a side portion 22s, and a curved portion 22c connecting the front portion 22f and the side portion 22s. A peripheral skeleton bead 30 extending in a direction along the outer shape of the inner panel 22 is formed at the edge of the inner panel 22 from the front portion 22f to the curved portion 22c. The peripheral skeleton bead 30 is composed of a general portion 31 and a plurality of reduced strength portions 32 arranged at intervals in a direction along the outer shape of the inner panel 22. In the front portion 22f of the inner panel 22, a plurality of reduced strength portions 32 are provided at intervals in the vehicle width direction, and one reduced strength portion 32 is provided in the curved portion 22c of the inner panel 22.

[0019] As shown in Fig. 5, the general portion 31 of the outer peripheral skeleton bead 30 arranged in the front portion 22f is a groove-shaped cross section part that is convex on the opposite side to the outer panel 21. As shown in Figs. 4 and 5, the general portion bottom surface 31c of the groove-shaped cross section is defined by the general portion outer ridgeline 31a extending along the outer shape of the inner panel 22 and the general portion inner ridgeline 31b extending parallel to the general portion outer ridgeline 31a at a position rearward of the general portion outer ridgeline 31a. Similarly, the general portion 31 of the outer peripheral skeleton bead 30 arranged in the curved portion 22c has the general portion bottom surface 31c of the groove-shaped cross section defined by the general portion outer ridgeline 31a extending along the outer shape of the inner panel 22 and the general portion inner ridgeline 31b extending parallel to the general portion outer ridgeline 31a at a position closer to the center in the vehicle width direction than the general portion outer ridgeline 31a.

[0020] As shown in FIG. 4, the reduced strength portion 32 is composed of a central portion 33 whose groove-shaped cross-section has a width and height smaller than those of the general portions 31, and connecting portions 34 that connect the central portion 33 to the general portions 31 on both sides.

[0021] As shown in FIG. 6, the central portion 33 of the strength-reduced portion 32 disposed in the front portion 22f has a groove-shaped cross section in which a central bottom surface 33c is defined by a central outer ridgeline 33a and a central inner ridgeline 33b. The central outer ridgeline 33a is located closer to the outer panel 21 and further forward in the vehicle than the general portion outer ridgeline 31a constituting the general portion 31 shown by the broken line. The central inner ridgeline 33b is located closer to the outer panel 21 and further forward in the vehicle than the general portion inner ridgeline 31b shown by the broken line by a distance greater than the distance between the central outer ridgeline 33a and the general portion outer ridgeline 31a in the vehicle front-rear direction. For this reason, the width in the vehicle front-rear direction of the central outer ridgeline 33a and the central inner ridgeline 33b is narrower than the width in the vehicle front-rear direction of the general portion 31 shown by the broken line between the general portion outer ridgeline 31a and the general portion inner ridgeline 31b. 6, the groove-shaped cross-sectional shape of the central portion 33 is similar to that of the general portion 31. Therefore, the width and height of the groove-shaped cross-section of the central portion 33 are smaller than those of the general portion 31.

[0022] As shown in FIG. 4, the connection portion outer ridge 34a and connection portion inner ridge 34b that constitute the connection portion bottom surface 34c of the connection portion 34 of the strength reduced portion 32 extend diagonally downward toward the rear of the vehicle from the central portion outer ridge 33a and central portion inner ridge 33b of the central portion 33 toward the general portion outer ridge 31a and general portion inner ridge 31b, respectively.

[0023] As described above, the central portion outer ridgeline 33a of the central portion 33 is located further forward of the vehicle than the general portion outer ridgeline 31a. Therefore, as shown in Fig. 3, the central portion outer ridgeline 33a of the central portion 33 and the connection portion outer ridgeline 34a of the connection portion 34 form the strength reduced portion outer ridgeline 32a that is recessed in a trapezoidal shape from the general portion outer ridgelines 31a on both sides toward the front of the vehicle in a plan view.

[0024] Further, the central portion inner ridgeline 33b of the central portion 33 is located further forward of the general portion inner ridgeline 31b by a distance greater than the distance in the vehicle front-rear direction between the central portion outer ridgeline 33a and the general portion outer ridgeline 31a. Therefore, as shown in Fig. 3, the central portion inner ridgeline 33b and the connection portion inner ridgeline 34b form the strength reduced portion inner ridgeline 32b that is recessed in a trapezoidal shape from the general portion inner ridgelines 31b on both sides toward the strength reduced portion outer ridgeline 32a in the front of the vehicle in a plan view.

[0025] 7, the central portion outer ridgeline 33a and the connection portion outer ridgeline 34a form the strength reduced portion outer ridgeline 32a that is recessed in a trapezoidal shape from the general portion outer ridgelines 31a on both sides toward the outer panel 21 in an elevational view. Similarly, the central portion inner ridgeline 33b and the connection portion inner ridgeline 34b form the strength reduced portion inner ridgeline 32b that is recessed in a trapezoidal shape from the general portion inner ridgelines 31b on both sides toward the outer panel 21 in an elevational view.

[0026] In the hood 20 of the vehicle 10 according to the embodiment described above, by providing the outer peripheral skeleton bead 30 with the reduced-strength portion 32, in the event of a pedestrian collision, the hood 20 will bend and deform starting from the reduced-strength portion 32, absorbing the impact force and reducing the impact force during a pedestrian collision. Furthermore, since no slits are provided in the inner panel 22, the durability of the hood 20 when opened and closed can be ensured.

[0027] Furthermore, since the hood 20 of the embodiment is provided with the strength reduced portion 32 also in the curved portion 22c, it is possible to reduce the impact force when a pedestrian collides with the vehicle 10 diagonally in front.

[0028] In addition, in the hood 20 of the embodiment, the strength reduced portion inner ridge line 32b is bent so as to be recessed in a trapezoid shape from the general portion inner ridge lines 31b on both sides toward the strength reduced portion outer ridge line 32a in the front of the vehicle in a plan view, and is bent so as to be recessed in a trapezoid shape from the general portion inner ridge line 31b toward the outer panel 21 in an elevation view. By configuring the strength reduced portion inner ridge line 32b to be bent in this manner, the rigidity of the strength reduced portion inner ridge line 32b can be reduced and it can become a starting point for folding in the event of a pedestrian collision. This makes it possible to reduce the impact force in the event of a pedestrian collision.

[0029] In the hood 20 of the embodiment, the strength reduced portion outer ridge line 32a and the strength reduced portion inner ridge line 32b are bent in an elevational view so as to be concave in a trapezoidal shape from the general portion outer ridge line 31a and the general portion inner ridge line 31b toward the outer panel 21. This makes it possible to make the height of the groove-shaped cross section of the strength reduced portion 32 smaller than the height of the groove-shaped cross section of the general portion 31, thereby reducing the peak impact force in the event of a pedestrian collision.

[0030] In the hood 20 of the embodiment described above, one reduced strength portion 32 is provided in the curved portion 22c, but this is not limiting, and a plurality of reduced strength portions 32 may be provided at intervals along the outer shape of the inner panel 22. Also, the curved portion 22c does not have to be provided with the reduced strength portion 32. [Explanation of symbols]

[0031] 10 vehicle, 11 body, 12 front compartment, 20 hood, 21 outer panel, 21a design surface, 21b back surface, 22 inner panel, 22c curved portion, 22f front portion, 22s side portion, 30 outer peripheral skeletal bead, 31 general portion, 31a general portion outer ridgeline, 31b general portion inner ridgeline, 31c general portion bottom surface, 32 strength reduced portion, 32a strength reduced portion outer ridgeline, 32b strength reduced portion inner ridgeline, 33 central portion, 33a central portion outer ridgeline, 33b central portion inner ridgeline, 33c central portion bottom surface, 34 connecting portion, 34a connecting portion outer ridgeline, 34b connecting portion inner ridgeline, 34c connecting portion bottom surface.

Claims

1. A hood for a vehicle is configured with an outer panel that forms a design surface, and an inner panel that is fixed to a surface of the outer panel opposite to the design surface, the rear end of the inner panel being rotatably attached to a body to open and close a front compartment at the front of the vehicle, The inner panel includes a front portion, a side portion, and a curved portion connecting the front portion and the side portion, a peripheral skeleton bead is formed on an edge of the inner panel from the front portion to the curved portion, the peripheral skeleton bead having a groove-shaped cross section that is convex toward the opposite side to the outer panel and that extends in a direction along the outer shape of the inner panel; the outer peripheral skeleton bead includes a general portion having a groove-shaped cross section extending in a direction along the outer shape of the inner panel, and a strength-reduced portion having a groove-shaped cross section smaller in width and height than the general portion and extending in a direction along the outer shape of the inner panel, the general portions and the reduced-strength portions are alternately arranged in a direction along an outer shape of the inner panel; A hood for a vehicle comprising:

2. A vehicle hood according to claim 1, the general portion includes a general portion outer ridgeline extending along an outer shape of the inner panel, and a general portion inner ridgeline extending parallel to the general portion outer ridgeline rearward of the vehicle or toward the center in the vehicle width direction from the general portion outer ridgeline, The strength reduced portion includes a central portion and a connection portion that connects the central portion and the general portion, the central portion includes a central portion outer ridgeline that is disposed on the outer side of the inner panel relative to the general portion outer ridgeline and extends along the outer shape of the inner panel, and a central portion inner ridgeline that is on the outer side of the inner panel relative to the general portion inner ridgeline and extends parallel to the central portion outer ridgeline rearward of the vehicle relative to the central portion outer ridgeline or toward the center in the vehicle width direction, the connection portion includes a connection portion outer ridge line extending obliquely downward from the central portion outer ridge line toward the general portion outer ridge line, and a connection portion inner ridge line extending obliquely downward from the central portion inner ridge line toward the general portion inner ridge line, A hood for a vehicle comprising:

Images