JP4600349B2 - Bonnet impact deformation absorbing structure - Google Patents

Description

  The present invention relates to a hood impact deformation absorbing structure that absorbs an impact force applied to a pedestrian by deforming the hood with an impact when, for example, a pedestrian collides with a hood of an automobile due to an automobile accident.

  Generally, an automobile has various pedestrian protection structures so as to protect the pedestrian in the event of an automobile accident that occurs when the pedestrian contacts the automobile. For example, in a car accident that occurs when a pedestrian comes into contact with a car, when the pedestrian is flipped up by a bumper or the like and falls onto the hood, the impact force that the pedestrian generally receives is absorbed by deforming the hood. A bonnet impact deformation absorbing structure is used.

Conventionally, as such a bonnet impact deformation absorbing structure, a structure in which a compression coil spring is incorporated in a part arranged near the lower side of the bonnet so that the bonnet is easily deformed by impact has been proposed (for example, see Patent Document 1). In this bonnet shock deformation absorption structure, a vibration-dissipating rubber for preventing vibration of the engine is provided on a part disposed directly under the head cover of the engine, for example, an air cleaner in the vicinity of the lower part of the bonnet. A compression coil spring is incorporated. This anti-vibration rubber absorbs vibrations such as high frequency generated from the engine, and a compression coil spring absorbs an impact force caused by impact deformation of the bonnet. When the bonnet deforms and collides with the air cleaner, the impact force is transmitted to the compression coil spring through the anti-vibration rubber and the collar that fixes the anti-vibration rubber, and the compression spring is compressed to move the air cleaner downward. By making the impact deformation easy, the impact force is absorbed.
JP 2004-98811 A

  However, in the conventional bonnet impact deformation absorbing structure, the anti-vibration rubber for preventing the vibration of the engine, the collar for fixing the anti-vibration rubber, and the anti-vibration rubber and the collar are interposed between the engine and the collar. Since the compression coil spring that absorbs the impact force is provided, there is a problem that the number of parts is large and the structure is complicated, and the efficiency of assembling the parts is lowered.

  The present invention has been made to solve the conventional problems, and has a bonnet impact deformation absorbing structure that can reduce the number of parts, simplify the structure, and improve the efficiency of assembling the parts into the engine room. The purpose is to provide.

In order to achieve the above object, the bonnet impact deformation absorbing structure according to the present invention is configured to support a component located below the bonnet on the engine or other components in the engine room, and to be fixed to the component and fitted to the column. And a support member for supporting the component so as to allow at least the bonnet to be extended and deformed downward.
With this configuration, when the pedestrian falls to the hood of the automobile and the hood is deformed, and an impact force is applied to the parts positioned below the hood via the hood, the support member is pressed and deformed by the support column. When the support member is deformed, the impact force is absorbed, and the impact absorption due to the impact deformation of the bonnet becomes easy. When the shock is easily absorbed, the impact force received by the pedestrian falls is reduced, and the pedestrian is protected from damage caused by the impact force. In this configuration, since the support column and the support member are provided, the number of parts is reduced and the shock deformation absorbing structure is simplified.

In the bonnet impact deformation absorbing structure according to the present invention, the support member is made of an elastic material and has a fitting hole that fits into the support column, and the support when the bonnet is deformed by impact and collides with the component. The member may extend along the support column to absorb the impact deformation of the bonnet.
With this configuration, when the bonnet is deformed by impact and collides with a component, the support member is deformed so as to extend along the support column, and the impact deformation of the bonnet is easily absorbed.

In the bonnet impact deformation absorbing structure according to the present invention, a notch groove is provided around the support member, and the part is supported by the support member by engaging a part of the part with the notch groove. It may be configured.
With this configuration, the impact force applied to the component is transmitted to the support member via a part of the component and the notch groove, the support member is pressed upward by the support column, and the support member is extended along the support column. Is absorbed.

In the bonnet impact deformation absorbing structure according to the present invention, a spherical portion is provided on the upper portion of the support column, the bottom surface of the fitting hole is formed in a hemispherical shape, and the upper end of the spherical portion is engaged with the bottom surface of the fitting hole. By combining, the impact deformation of the bonnet may be absorbed by the spherical portion and the fitting hole when the bonnet is deformed downward and laterally.
With this configuration, when the bonnet is deformed not only in the downward direction but also in the lateral direction and a lateral impact force is applied to the component, the support member is pressed in the lateral direction by the spherical portion that engages with the bottom surface of the fitting hole. The support member is also deformed in the lateral direction and the impact force is absorbed.

In the bonnet impact deformation absorbing structure according to the present invention, the support member has an upper portion made of an elastic material in which a fitting hole for fitting to the support column is formed, and the bonnet is deformed by impact and collides with the component. In some cases, the upper portion is pressed by the support column and extends along the support column to absorb impact deformation of the bonnet.
With this configuration, the fitting portion formed on the upper portion of the support member is formed of an elastic material that easily absorbs impact deformation. The support part that is formed integrally around the fitting part and supports a part of the part can be formed of a material having higher mechanical strength than the elastic material, and the part is made stronger by the support part. Supported.

  As described above, the bonnet impact deformation absorbing structure according to the present invention provides a bonnet impact deformation absorbing structure that can reduce the number of parts, simplify the structure, and improve the efficiency of assembling the parts into the engine room. can do.

  Embodiments of the bonnet impact deformation absorbing structure according to the present invention will be specifically described below with reference to the drawings.

1 to 7 show an embodiment of a bonnet impact deformation absorbing structure according to the present invention.
As shown in FIG. 1, an air cleaner 4 as a part is positioned above the head cover 3 below the hood 2 of the automobile 1. According to the present invention, a reserve tank and an exhaust duct may be used in addition to the air cleaner 4 as parts. Reference numeral 5 denotes a bonnet impact deformation absorbing structure according to the present invention, which will be described with reference to FIGS.

2-7, the bonnet impact deformation absorption structure 5 concerning this invention is comprised by the support | pillar 6 and the support member 7. In FIG.
As shown in detail in FIGS. 2 and 3, the column 6 protrudes toward the air cleaner 4 and is attached to the head cover 3 in the engine or other components in the engine room.
As shown in detail in FIGS. 4 and 5, the column 6 includes a spherical portion 6 a on the upper portion, a stem portion 6 b having a lower end portion integrally formed with the spherical portion 6 a and having a screw formed on the outer peripheral portion. The stem portion 6b is screwed to the support mounting portion 3a of the head cover 3 by a nut 8 and a washer 9. The spherical portion 6a is formed of a spherical body such as a sphere or an ellipsoid, and the stem portion 6b is formed of a columnar body having a cross section such as a circle, an ellipse, or a polygon.
The stem 6b is formed with sufficient strength and length to support the air cleaner 4 according to the shape, weight and structure of the air cleaner 4 and the magnitude of impact force applied to the air cleaner 4.

  On the other hand, the support member 7 includes a fitting portion 10 having a bottomed fitting hole 10 a that is open at the bottom, and a support portion 11 that is integrally formed around the fitting portion 10. For this reason, the spherical portion 6 a of the support column 6 is engaged with the bottom surface of the engagement hole 10 a of the fitting unit 10 so that the support column 6 is fitted to the support member 7.

  The fitting hole 10a is formed in a substantially cylindrical shape, and has a hemispherical bottom surface that is substantially the same as the spherical portion 6a. Here, the maximum cross-sectional area of the spherical portion 6a cut in the direction orthogonal to the axis of the column 6 is larger than the cross-sectional area of the stem 6b cut in the direction orthogonal to the axis of the column 6, and in the direction orthogonal to the axis of the column 6 The maximum cross-sectional area of the bottom surface of the cut fitting hole 10a is larger than the cross-sectional area of the fitting hole 10a cut in the direction orthogonal to the axis of the support column 6. Therefore, when the spherical portion 6a is engaged with the bottom surface of the fitting hole 10a and the support column 6 is engaged with the support member 7, even if an external force is applied in the direction of pulling out the support member 7 from the support column 6, the support member 7 It is designed not to be easily extracted.

  The fitting portion 10 of the support member 7 is made of, for example, an elastic material such as plastic, rubber, or elastomer, and has a shape, size, and a tensile force that provides an impact absorption effect according to the magnitude of the impact force applied to the air cleaner 4. It has mechanical strength such as strength, tear strength and impact resilience.

The support member 7 has a support portion 11 that is integrally formed around the fitting portion 10 and has a notch groove 11a formed in the center portion. The air cleaner 4 has a case portion 4a and a protruding portion 4b that protrudes downward at the lower end of the case portion 4a (see FIG. 5). A circular opening hole 12 is formed in the protruding portion 4b, and a flange portion 13 is provided. The support member 7 is fixed to the air cleaner 4 by fitting the flange portion 13 into the notch groove 11 a of the fitting portion 10.
As shown in FIG. 5, the support portion 11 is a sufficient machine that can reliably support the flange portion 13 according to the size of the flange portion 13, the thickness of the case portion 4 a, the magnitude of impact received by the air cleaner 4, and the like. Strength. The cross section of the support part 11 is formed in, for example, a circle or an ellipse.

  The support portion 11 is made of the same material as that of the fitting portion 10 and may be integrally formed or may be a different material depending on the case. When different materials are used, for example, as shown in FIG. 7, the support member 7 has a divided structure in which the fitting portion 10 and the support portion 11 are engaged, and the support portion 11 is a plastic having a relatively high mechanical strength. The fitting portion 10 may be formed of elastic rubber or elastomer.

Hereinafter, the arrangement of the support 6 and the support member 7 will be described.
As shown in FIGS. 5 and 6, the distance from the upper surface of the support portion 11 to the top surface of the fitting portion 10 and L _1, the fitting portion 10 in the casing part 4a joined by an impact force F in the arrow direction strut 6 the distance to the top surface of the fitting portion 10 after the extension when L ₂ from the upper surface of the support portion 11 of the extended state along the support member 7 when the hood 2 collides with the air cleaner 4 is deformed by impact elongation distance _{L 3} to extension _L 2 -L _1, and the case portion 4a is lowered by extending the distance _{L 3.} In order to secure such an extension distance L ₃ , if the distance between the lower part of the support member 7 and the lower part of the support member 7 descending and contacting the upper part of the nut 6 is L ₄ , L _{4 wherein} to satisfy L 4> _{L 3,} the support member 7 and the strut 6 are arranged.
By such arrangement, as shown in FIG. 3, the bonnet 2 which is deformed when the impact force F is applied by colliding with the air cleaner 4, is pressed into the column 6 by the fitting portion 10 by a distance L ₃ and simultaneously extended, lowered air cleaner 4 by a distance L _3, the impact force applied to the air cleaner 4 is absorbed.

  When the impact force received by the bonnet 2 is applied to the bonnet 2 from an inclined direction, a lateral impact force is also applied to the air cleaner 4 as a component of the impact force. The support member 7 is formed so that the fitting portion 10 is deformed in the lateral direction even with respect to the impact force in the lateral direction, and can also absorb the impact force in the lateral direction.

  Corresponding to the magnitude of the impact force applied to the support member 7, the support member 7 and the column 6 may be configured so that the fitting portion 10 is broken.

  As described above, the bonnet impact deformation absorbing structure 5 according to the present invention absorbs the shock deformation of the bonnet 2 by being fitted to the support 6 fixed to the air cleaner 4 and the support 6 provided near the lower portion of the air cleaner 4. When the pedestrian falls on the hood 2 of the automobile 1 and the hood 2 is deformed, and an impact force is applied to the air cleaner 4 positioned below the hood 2 through the hood 2. The fitting portion 10 is pressed by the support 6, and the fitting portion 10 extends along the support 6. Due to the extension of the fitting portion 10, the impact force is absorbed, and the impact absorption due to the impact deformation of the bonnet 2 becomes easy.

  A notch groove 11 a is formed around the support member 7, and a part of the air cleaner 4 is engaged with the notch groove 11 a so that the air cleaner 4 is supported by the support member 7. The force is transmitted to the support member 7 via a part of the air cleaner 4 and the notch groove 11a, the fitting portion 10 is pressed upward by the support column 6, and the fitting portion 10 is extended upward, and the impact force is suitable. To be absorbed.

  Since the spherical portion 6a is formed on the upper portion of the support column 6, the bottom surface of the fitting hole 10a is formed in a hemispherical shape, and the upper end of the spherical portion 6a is engaged with the bottom surface of the fitting hole 10a. When deformed in the lateral direction, impact deformation of the bonnet 2 is absorbed by the spherical portion 6a and the fitting hole 10a. Even if the bonnet 2 is deformed not only in the downward direction but also in the lateral direction and a lateral impact force is applied to the air cleaner 4, the fitting portion 10 is moved in the lateral direction by the spherical portion 6a engaged with the bottom surface of the fitting hole 10a. Is also pressed, the fitting part 10 is deformed in the lateral direction, and the impact force is absorbed in the vertical and horizontal directions.

In the above-described embodiment shown in FIGS. 4 to 7, the column 6 provided near the lower portion of the air cleaner 4 has been described. However, in the present invention, the column 6 is provided above the air cleaner 4 to support the support member 7. May be deformed to extend downward. Further, the case where one protrusion 4b is formed on the air cleaner 4 has been described. In the present invention, as shown in FIGS. 2 and 3, a plurality of protrusions 4b are formed on the air cleaner 4, and this protrusion The support member 7 may be fixed to 4b.
The support member 7 may be fixed to all of the plurality of protruding portions 4b or may not be fixed to all of the protruding portions 4b. For example, the support member 7 may be fixed to one place of the three protruding portions 4b, and a member that does not have an impact absorbing function may be fixed to the other two protruding portions 4b.
Even if the protruding portion 4b to which the support member 7 is fixed is provided at one place, the impact force applied to the bonnet 2 by the support member 7 can be suitably absorbed. The work of assembling the air cleaner 4 into the engine room can be facilitated.

  As described above, the bonnet impact deformation absorbing structure according to the present invention has an effect that the number of parts can be reduced, the structure can be simplified, and the efficiency of assembling the parts into the engine room can be improved. Moreover, when a pedestrian collides with the hood of an automobile, the impact force applied to the pedestrian can be weakened by deforming the hood with an impact. Furthermore, even when high-frequency vibration of the engine is transmitted to the head cover when the engine is driven, the high-frequency vibration can be absorbed by the impact deformation absorbing member.

1 is a perspective view of an automobile having a bonnet impact deformation absorbing structure and an air cleaner according to the present invention. It is sectional drawing of the bonnet impact deformation absorption structure and air cleaner concerning the present invention provided in the engine room. It is sectional drawing of the bonnet impact deformation | transformation absorption structure and air cleaner concerning this invention when an impact is added to a bonnet. It is a perspective view of the bonnet impact deformation absorption structure concerning the present invention which fractured partially. It is a fragmentary sectional view of the bonnet impact deformation absorption structure concerning the present invention when an impact is not applied to a bonnet. It is a fragmentary sectional view of the bonnet impact deformation | transformation absorption structure concerning this invention when an impact is added to a bonnet and a support member expand | extends. It is a fragmentary sectional view of other embodiment of the bonnet impact deformation absorption structure concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Bonnet 3 Head cover 3a Prop mounting part 4 Air cleaner 4a Case part 4b Protrusion part 5 Bonnet impact deformation absorption structure 6 Prop 6a Spherical part 6b Stem part 7 Support member 8 Nut 9 Washer 10 Fitting part 10a Fitting hole 11 Support part 11a Notch groove 12 Opening 13 Flange

Claims (4)

A column that supports a component located below the bonnet to the engine or other components in the engine room, and is fixed to the component and fitted to the column, and at least the bonnet is allowed to extend and deform downward. A support member that supports a component, the support member is made of an elastic material, has a fitting hole that fits into the column, and the support member is deformed by impact and collides with the component. A bonnet impact deformation absorbing structure that extends along the support column and absorbs shock deformation of the bonnet. Absorbing said support member has a fitting hole fitted to the front Symbol strut, hood said support member when deformed by the impact and collides with the component extends along said strut shock deformation of the hood The bonnet impact deformation absorbing structure according to claim 1. A column that supports a component located below the bonnet to the engine or other components in the engine room, and is fixed to the component and fitted to the column, and at least the bonnet is allowed to extend and deform downward. A support member that supports a component, the support member is made of an elastic material, has a fitting hole that fits into the column, a spherical portion is provided on the top of the column, and a bottom surface of the fitting hole Is formed in a hemispherical shape, and the upper end of the spherical portion is engaged with the bottom surface of the fitting hole, so that when the bonnet is deformed downward and laterally, the impact deformation of the bonnet is caused by the spherical portion and the fitting hole. bonnet shock deformation absorbing structure, characterized in that to absorb. A column that supports a component located below the bonnet to the engine or other components in the engine room, and is fixed to the component and fitted to the column, and at least the bonnet is allowed to extend and deform downward. A support member for supporting a component, and the support member has an upper portion made of an elastic material in which a fitting hole for fitting to the support column is formed, and when the bonnet is deformed by impact and collides with the component by extending along said strut upper is pressed against the pillar, hood impact deformation absorbing structure, characterized in that to absorb the impact deformation of the bonnet.

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