JP4630732B2 - Shock absorbing panel and structure for mounting the panel to an internal combustion engine - Google Patents

Description

  The present invention relates to an impact absorbing panel such as a protector cover for protecting a fuel supply system component of an internal combustion engine for a vehicle from an impact at the time of a vehicle collision and a structure for mounting the panel to the internal combustion engine.

Patent Document 1 discloses a glove box provided on a vehicle instrument panel. In this patent document 1, an inner panel and an outer panel are integrally welded so as to have a hollow portion inside, and a plurality of inner ribs are integrally projected on the outer panel facing surface of the inner panel, and the inner rib is formed on the outer panel. The lid is constructed by welding integrally to the inner panel facing surface to ensure the rigidity of the door.
Japanese Patent No. 3282929 (page 4, FIG. 6)

  By the way, for example, in an internal combustion engine for a vehicle, a protector cover as an impact absorbing panel is arranged on the fuel supply system component side such as an injector or a fuel pipe so as to be spaced from the component, and the component cover is covered with the protector cover. In this way, the fuel supply system parts are protected from an impact at the time of a vehicle collision.

  If such a structure as described in Patent Document 1 is adopted for such an impact absorbing panel, the rigidity of the impact absorbing panel can be secured, but the impact load acting on the outer panel is not relaxed and is directly passed through the inner rib. It may be transmitted to the panel and the entire shock absorbing panel may be damaged, making it impossible to perform its protective function.

  Further, when a large number of elongated inner ribs are provided on the inner panel as in Patent Document 1, it is necessary to carefully perform the demolding operation so that the inner ribs are not broken during demolding. In addition, it is necessary to accurately set a draft angle for rib forming in the mold, which makes it difficult to manufacture the mold and causes an increase in cost.

  The present invention has been made in view of the above points, and the object of the present invention is to absorb and mitigate the impact load by the cooperation of the outer panel and the inner panel to avoid damage to the inner panel in particular, and to ensure the protection function. It is to make it show.

  In order to achieve the above object, the present invention provides an impact absorbing panel formed by integrally joining a resin inner panel and a resin outer panel receiving impact load so as to have a hollow portion therein, and an internal combustion engine of the panel. The following solutions were taken for the mounting structure.

That is, the invention according to claims 1 to 3 relates to the former shock absorbing panel, and the invention according to claim 1 is that the thickness of the outer panel is formed thinner than the inner panel, and the outer panel The edge of the inner panel and the edge of the inner panel are integrally welded to form a double structure, and a plurality of trapezoidal or semicircular cross-section convex portions are formed on the outer panel facing surface of the inner panel on the outer panel side. A plurality of trapezoidal or semicircular cross-sectional concave portions are formed so as to protrude from the outer panel side, while a plurality of cross-sections are formed on the inner panel facing surface of the outer panel. A trapezoidal or semi-circular convex part is formed so as to protrude to the inner panel side, and a plurality of cross-sectional trapezoidal or semi-circular concave parts are formed. Viewed from N'napaneru side is formed so as to recess and the said inner panel and the outer panel, the outer panel when subjected to impact load, the respective convex portions formed on one panel, which is formed on the other panel It is configured to be individually fitted into the recesses, and to be in frictional contact with each other in the surface contact or line contact state with each of the inserted convex portions and the respective concave surfaces in the concave portions in which the convex portions are inserted . It is characterized by.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the convex part and the concave part extend in a band shape.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the outer panel is formed of an elastomer resin material.

  The invention described in claim 4 relates to a structure for mounting the latter shock absorbing panel to the internal combustion engine, and the shock absorbing panel according to any one of claims 1 to 3, wherein the inner panel is a fuel for the internal combustion engine. It is arranged so as to face the supply system component side and to be spaced from the component, and the component is covered with the shock absorbing panel, and the shock absorbing panel is attached to the internal combustion engine in this state.

According to the first aspect of the present invention, when the outer panel receives an impact load, each convex portion formed on one of the inner panel and the outer panel is individually fitted into each concave portion formed on the other panel. In order to absorb and alleviate the impact load due to frictional contact between a part of each inclined surface in the inserted convex part and the concave part in which the convex part is inserted in a surface contact or line contact state, the shock absorbing panel is damaged. The protective function can be surely exhibited by avoiding the above. In addition, it is easier to form the mold shape corresponding to the convex part and the concave part in the mold than to form the mold shape corresponding to the rib to the mold, so that the mold can be manufactured easily and the cost can be reduced. . Furthermore, since the outer panel is thinner than the inner panel, it can be easily deformed by an impact load, and the frictional contact between the convex portion and the concave portion can be effectively performed.

  According to the invention which concerns on Claim 2, the frictional contact area of a convex part and a recessed part increases, and an impact load can be absorbed and relieve | moderated largely.

  According to the third aspect of the present invention, the outer panel is made of an elastomer resin material and has high toughness. Therefore, the outer panel can absorb the impact load well and can sufficiently resist the impact load.

  According to the fourth aspect of the present invention, the impact load at the time of the vehicle collision can be absorbed and relaxed by the impact absorbing panel, and the fuel supply system parts such as the injector and the fuel pipe can be prevented from being damaged.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 3 shows a cross section of the protector cover in a state where the protector cover 1 as the shock absorbing panel according to Embodiment 1 of the present invention is attached to the outside of the resin or metal intake manifold 3 that is a component of the vehicle internal heat engine. It is a perspective view.

  In FIG. 3, 5 is an injector as a fuel supply system component disposed outside the intake manifolds 3, and 7 is a fuel pipe as a fuel supply system component disposed outside the intake manifolds 3. The fuel pipe 7 is horizontally disposed above the injector 5 by a bracket (not shown).

  Each intake manifold 3 is integrally provided with a plurality of boss portions 9 having screw holes 9a, and the back surface of the protector cover 1 (an inner panel 13 to be described later) faces the injector 5 and the fuel pipe 7 side. In this state, the injector 5 and the fuel pipe 7 are disposed so as to have a gap C1 and the injector 5 and the fuel pipe 7 are covered with the protector cover 1, and in this state, the bolts 11 are screwed to the boss portions 9 respectively. The protector cover 1 is attached to both the intake manifolds 3 by being screwed into the holes 9a.

  The protector cover 1 includes a resin inner panel 13 and a resin outer panel 15 that receives an impact load. The inner panel 13 and the outer panel 15 are formed in a substantially U-shaped cross section by a vertical surface 1a extending in a substantially vertical direction, and an upper surface 1b and a lower surface 1c extending rearward from the upper and lower ends of the vertical surface 1a. As shown in enlarged view (a), the outer panel facing surface 13a and the inner panel facing surface 15a are made to face each other so as to have a hollow portion C2, and both edge portions 13b, 15b of the upper and lower surfaces 1b, 1c are formed. The protector cover 1 is formed in a double structure by welding (bonding) integrally by vibration welding. In the first embodiment, the inner panel 13 and the outer panel 15 are welded to each other by the vibration welding method. However, the inner panel 13 and the outer panel 15 are not limited to this, and are welded by other welding methods such as an ultrasonic welding method and a hot plate welding method. Alternatively, it may be fastened with bolts. The same applies to Modifications 1 and 2 and Embodiments 2 and 3 described below.

As a feature of the present invention, a plurality of trapezoidal convex portions 17a and concave portions 17b extending in a strip shape substantially horizontally in the vehicle width direction are alternately arranged vertically on the vertical surface 1a of the outer panel facing surface 13a of the inner panel 13. And are integrally formed. Here, the convex portion 17a refers to a portion that protrudes toward the outer panel 15, and the concave portion 17b refers to a portion that is recessed as viewed from the outer panel 15 side. On the other hand, the vertical surface 1a of the inner panel facing surface 15a of the outer panel 15 also has a plurality of trapezoidal cross-section convex portions 19a and concave portions 19b that extend in a horizontal and substantially horizontal direction in the vehicle width direction, and are alternately and continuously integrated. Is formed. Here, the convex portion 19a refers to a portion that protrudes toward the inner panel 13, and the concave portion 19b refers to a portion that is recessed when viewed from the inner panel 13 side. The convex portion 17a of the inner panel 13 is fitted into the concave portion 19b of the outer panel 15, and a part of each of the inclined surfaces 17c and 19c is in surface contact with each other, and the convex portion 19a of the outer panel 15 is the inner panel. 13 are inserted in opposition to the recesses 17b, and some of the inclined surfaces 17c and 19c are in surface contact with each other. The inclination angle α of the inclined surfaces 17c and 19c is preferably set to 20 ° or more and 60 ° or less as shown in FIG. If the angle is less than 20 °, the rigidity of the outer panel 15 becomes too large and it is difficult to deform the outer panel 15 when subjected to an impact load. On the other hand, if the angle exceeds 60 °, the outer panel 15 is excessively deformed and the frictional resistance is reduced. It is because absorption becomes small. Then, when the outer panel 15 receives an impact load, the respective protrusions 19a of the outer panel 15 are individually inserted into the respective recesses 17b of the inner panel 13, and the inserted protrusions 19a and the protrusions 19a are inserted. each of the inclined surface 17c in the recess 17b, causes the frictional contact with a portion of the surface contact with each other in 19c, and is fitted individually into the recesses 19b of the outer panel 15 each projection 17a of the inner panel 13, was the fitted A part of each of the inclined surfaces 17c and 19c in the convex portion 17a and the concave portion 19b in which the convex portion 17a is inserted is brought into frictional contact with each other in a surface contact state.

  The plate thickness T1 of the outer panel 15 is formed to be thinner than the plate thickness T2 of the inner panel 13, and the outer panel 15 is lower in rigidity than the thick inner panel 13 and weak against an impact load. Further, the outer panel 15 is formed of, for example, an elastomer resin material mainly composed of polyamide, and the outer panel 15 is also tough and lower in rigidity than the inner panel 13. On the other hand, the inner panel 13 is formed of a resin material containing reinforcing fibers mixed with reinforcing fibers (not shown) such as glass fibers with high rigidity, and a plurality of ribs 21 are provided on the back side of the convex portion 17a. It is integrally formed in the up-down direction with a gap in the width direction. If the outer panel 15 is made to have a lower rigidity than the inner panel 13 by changing the material of the resin material, the plate thicknesses T1 and T2 of both the panels 15 and 13 may be equal to each other. The panel 13 may be a resin material that does not mix reinforcing fibers. Further, when the inner panel 13 and the outer panel 15 are formed of the same resin material, the plate thickness T1 of the outer panel 15 is set to be smaller than the plate thickness T2 of the inner panel 13. Furthermore, the convex portions 17a and concave portions 17b of the inner panel 13 and the convex portions 19a and concave portions 19b of the outer panel 15 may be provided so as to extend in the vertical direction, and the upper and lower opposing surfaces of the inner panel 13 and the outer panel 15 are provided. You may provide the convex parts 17a and 19a and the recessed parts 17b and 19b in the whole opposing surfaces 13a and 15a to include. Furthermore, you may provide the convex parts 17a and 19a and the recessed parts 17b and 19b intermittently. The same applies to Modifications 1 and 2 and Embodiments 2 and 3 described below.

As described above, in the first embodiment, each convex portion 17a of the inner panel 13 is fitted to face each concave portion 19b of the outer panel 15, and a part of each of the inclined surfaces 17c and 19c is brought into surface contact with each other. each protrusion 19a of the outer panel 15 is opposed to the recesses 17b of the inner panel 13 is fitted, each of the inclined surfaces 17c, it is allowed to face contact with each other part of 19c. Therefore, when the outer panel 15 receives an impact load at the time of a vehicle collision from the front (arrow P1 direction in FIG. 3) or from the side (arrow P2 direction in FIG. 3), each convex portion 19a of the outer panel 15 becomes each concave portion of the inner panel 13. Each of the inclined surfaces 17c and 19c in the concave portions 17b into which the convex portions 19a and the convex portions 19a are inserted are brought into frictional contact with each other in a surface contact state. The respective convex portions 17a are individually fitted into the respective concave portions 19b of the outer panel 15, and the inclined portions 17c and 19c in the concave portions 19b into which the convex portions 17a are fitted and the convex portions 17a are fitted to each other. Friction contact in the contact state absorbs and reduces the impact load, thereby avoiding damage to the protector cover 1 to prevent the injector 5, fuel pipe 7, etc. Charge supply system component can be prevented from being damaged, it is possible to reliably exhibit a protective function.

  In the first embodiment, since the convex portions 17a and 19a and the concave portions 17b and 19b are both formed in a band shape, the convex portion 17a and the concave portion 19b make frictional contact with a large contact area, and the convex portion 19a and the concave portion 17b. And frictional contact with a large contact area, it is possible to greatly absorb and relax the impact load.

  Further, in the first embodiment, the outer panel 15 is made thinner than the inner panel 13 so as to be easily deformed by an impact load. Therefore, the frictional contact between the convex portion 17a and the concave portion 19b and the relationship between the convex portion 19a and the concave portion 17b. The frictional contact can be effectively performed.

  Furthermore, in the first embodiment, the outer panel 15 is formed of an elastomer resin material so as to be tougher than the inner panel 13, so that the outer panel 15 has a good absorbability of the impact load and sufficiently resists the impact load. Can do.

  Moreover, in Embodiment 1, since the inner panel 13 is formed of a resin material containing reinforcing fibers and has a high rigidity so as to sufficiently resist an impact load, the protection function of the protector cover 1 can be further ensured.

  In addition, the convex portions 17a and 19a and the concave portions 17b and 19b of the first embodiment can easily form a mold shape as compared with the rib as in Patent Document 1 in which the draft angle needs to be set with high accuracy. Manufacturing can be facilitated and cost can be reduced.

(Modification 1)
4 is a view corresponding to FIG. 2 and showing a first modification of the first embodiment. In this modified example 1, the inclination angle α1 of the inclined surface 19c of the outer panel 15 and the inclined surface 19c of the recess 19b is made smaller than the inclination angle α2 of the inclined surface 17c of the inner panel 13 and the inclined surface 17c of the inner panel 13, and the inner panel. The top surface side edge 19d of the convex portion 19a of the outer panel 15 is brought into line contact with the inclined surface 17c of the convex portion 17a of the inner panel 13. The rest of the configuration is the same as that of the first embodiment, and therefore, the description of the same components will be omitted by substituting the drawings used in the first embodiment. Also by this, the same operation effect as Embodiment 1 can be produced.

(Modification 2)
FIG. 5 is a view corresponding to FIG. 2 and showing a second modification of the first embodiment. In the second modification, in the assembled state of the inner panel 13 and the outer panel 15, the convex portions 17a and concave portions 17b of the inner panel 13 and the convex portions 19a and concave portions 19b of the outer panel 15 are separated from each other to be in a non-contact state. . At this time, the top surface dimension W1 of the convex portion 19a of the outer panel 15 and the opening dimension W2 of the concave portion 17b of the inner panel 13 are W1 <W2, and the convex portion 19a of the outer panel 15 is within the opening of the concave portion 17b of the inner panel 13. Set to position. Further, the top surface dimension of the convex portion 17a of the inner panel 13 is set to be smaller than the opening size of the concave portion 19b of the outer panel 15, and the convex portion 17a of the inner panel 13 is positioned within the opening of the concave portion 19b of the outer panel 15. To do. The rest of the configuration is the same as that of the first embodiment, and therefore, the description of the same components will be omitted by substituting the drawings used in the first embodiment. Also by this, the same operation effect as Embodiment 1 can be produced. In addition, in the assembled state of the inner panel 13 and the outer panel 15, the concave and convex portions of each panel are not in contact with each other, so that the two panels are in contact with each other while the vehicle is running or the internal combustion engine is operating. No vibration noise (battering noise) is generated.

(Embodiment 2)
FIG. 6 is a front view of the outer panel 15 according to the second embodiment. In the second embodiment, a plurality of frustoconical convex portions 19 a are formed independently on the outer panel 15. Therefore, although not shown, the inner panel 13 has a concave portion 17b facing the convex portion 19a so that the convex portion 19a comes into frictional contact when the outer panel 15 receives an impact load. The relationship with the inner panel 13 may be the same as the cross-sectional shape shown in FIGS. The rest of the configuration is the same as that of the first embodiment, and therefore, the description of the same components will be omitted by substituting the drawings used in the first embodiment. Also by this, the same effect as Embodiment 1 can be produced. In addition, the mold structure is simplified as compared with the first embodiment, and the inner panel 13 and the outer panel 15 can be more easily molded.

(Embodiment 3)
FIG. 7 is a view corresponding to FIG. 1 of the third embodiment. In the third embodiment, the concave portion 19b of the outer panel 15 opposed to the convex portion 17a of the inner panel 13 is formed into a semicircular shape, while the concave portion 17b of the inner panel 13 opposed to the convex portion 19a of the outer panel 15 is formed into a semicircular shape. . Also, a plurality of ribs 23 extending continuously in the vertical direction are integrally formed on the front and back surfaces of the protector cover 1 (outer surfaces of the panels 13 and 15) at intervals in the vehicle width direction. The rest of the configuration is the same as that of the first embodiment, and therefore, the description of the same components will be omitted by substituting the drawings used in the first embodiment. Also by this, the same operation effect as Embodiment 1 can be produced.

  In each of the above embodiments, the case where the shock absorbing panel is the protector cover 1 that protects the fuel supply system parts of the internal combustion engine has been described. However, the present invention can also be applied to a cylinder head cover, a glove box lid, a knee pad, or the like. .

  The present invention is useful, for example, as an impact absorbing panel such as a protector cover for protecting a fuel supply system component of a vehicle internal combustion engine from an impact at the time of a vehicle collision, and a structure for mounting the panel to the internal combustion engine.

(A) is sectional drawing which expands and shows the A section of FIG. 3, (b) is a right view of (a), (c) is a left view of (a). It is the B section enlarged view of FIG. It is a perspective view which shows the protector cover cross section in the state which attached the protector cover which concerns on Embodiment 1 to the intake manifold outer side. FIG. 3 is a view corresponding to FIG. 2 and illustrating a first modification of the first embodiment. FIG. 9 is a view corresponding to FIG. 2 and illustrating a second modification of the first embodiment. 6 is a front view of an outer panel in Embodiment 2. FIG. FIG. 6 is a view corresponding to FIG. 1 of Embodiment 3.

1 Protector cover (shock absorbing panel)
5 Injector (fuel supply system parts)
7 Fuel pipe (fuel supply system parts)
13 Inner panel 13a Outer panel facing surface 15 Outer panel 15a Inner panel facing surface C1 Interval C2 Hollow portion T1 Outer panel thickness T2 Inner panel thickness 17a, 19a Convex portions 17b, 19b Concavity

Claims (4)

A shock absorbing panel formed by integrally joining a resin inner panel and a resin outer panel receiving a shock load so as to have a hollow portion inside,
The outer panel is made thinner than the inner panel, and the edge of the outer panel and the edge of the inner panel are welded together to form a double structure,
On the outer panel facing surface of the inner panel, a plurality of trapezoidal or semicircular cross-sectional convex portions are formed so as to protrude toward the outer panel side, and a plurality of cross-sectionally trapezoidal or semicircular cross-sectional concave portions are formed. It is formed to be recessed as seen from the outer panel side,
On the other hand, on the inner panel facing surface of the outer panel, a plurality of cross-sectional trapezoidal or semicircular cross-section convex portions are formed so as to protrude toward the inner panel, and a plurality of cross-sectional trapezoidal or semicircular cross-sectional shapes Is formed so that the concave portion of the inner surface is recessed when viewed from the inner panel side,
When the outer panel receives an impact load, the inner panel and the outer panel are individually fitted with the respective protrusions formed on one panel into the respective recesses formed on the other panel . An impact-absorbing panel, characterized in that a part of each inclined surface in a convex part and a concave part in which the convex part is fitted is in frictional contact with each other in a surface contact or line contact state.
The shock absorbing panel according to claim 1,
The impact absorbing panel, wherein the convex portion and the concave portion extend in a band shape . The impact-absorbing panel according to claim 1 or 2 ,
The outer panel is formed of an elastomer resin material. The shock absorbing said parts claims 1 to 3 or 1 inner panel shock absorbing panel according to Section is arranged to have and the component and spacing to face the fuel supply system component side of the internal combustion engine A structure for mounting the shock absorbing panel to the internal combustion engine, wherein the shock absorbing panel is covered with the panel and the shock absorbing panel is attached to the internal combustion engine in this state.

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