JP4643952B2 - Vehicle door - Google Patents

Description

  The present invention relates to a vehicle door.

  As shown in Patent Document 1, the present applicant has proposed a reinforcing structure for a door for a vehicle. The configuration includes an inner panel that is connected to the vehicle body via a hinge so as to be opened and closed, and an outer panel that covers the inner panel. A plurality of reinforcements are fixed to the inner panel, and the strength against impact is enhanced by these reinforcements.

  Among the reinforcements, on the both sides of the inner panel in the longitudinal direction of the vehicle body, there are front reinforcements that extend vertically (for example, hinge reinforcements that attach hinges) and rear reinforcements (for example, latch reinforcements that attach latches). A pair of impact bars are installed between the two reinforcements and are opposed to each other with a space in the vertical direction in the longitudinal direction of the vehicle body. Further, a door module is mounted between the panels.

Each impact bar has a front end portion fixed to a front reinforcement via a bracket, and a rear end portion fixed to the rear reinforcement (see, for example, Patent Document 1). The applicant of the present application discloses a detailed configuration in Patent Document 2 regarding the latch mounting structure.
JP 2004-122960 A Japanese Patent Laid-Open No. 2004-130962

  In the configuration described above, the rear reinforcement and the impact bar are connected in a substantially orthogonal posture, so when the impact bar receives an impact, the connecting portion of the impact bar becomes the edge of the rear reinforcement. It becomes easy to receive a shear force along. In particular, since the upper impact bar is greatly restricted in layout and dimensions in relation to the door module mounted between both panels, it is difficult to ensure sufficient strength.

  The present invention has been made in view of the above problems, and allows a vehicle door capable of exhibiting a high shock absorption / distribution function by propagating an impact acting on an upper impact bar having a large constraint to the entire inner panel as much as possible. It is an issue to provide.

In order to solve the above-described problems, the present invention provides an outer panel that forms an outer shell of a vehicle, an inner panel that is disposed opposite to the outer panel and forms a vehicle interior, and is disposed between the inner panel and the outer panel. A rear reinforcement fixed to the vehicle rear side of the inner panel, and an upper impact bar having one end fixed to the rear reinforcement and the other end protruding forward, The rear reinforcement is arranged obliquely so that the lower side is positioned forward of the upper side, and a flange part joined to the inner panel, and a connection protruding from the flange part toward the outer panel A wall portion and an attachment portion extending on the outer panel side edge of the connecting wall portion and receiving the upper impact bar; And at least a portion of the connecting wall portion facing the upper impact bar in the vehicle width direction forms a bulging portion that bulges forward, and the upper impact bar is provided below the rear reinforcement. The lower end of the lower impact bar, which is arranged below and extends substantially in the vehicle longitudinal direction, is fixed, and the part of the bulging part that receives the impacted upper impact bar is in side view when assembled. And projecting forward so as to be close to a vertical line passing through the intersection of the upper end of the lower impact bar and the connecting wall portion of the rear reinforcement, and the bulging portion is rearward of the connecting wall portion. The vehicle door is characterized by being curved with the center of the arranged arc as a center .

  In this aspect, the impact acting on the upper impact bar propagates to the rear reinforcement, and the bulging portion of the rear reinforcement receives the impact in the vehicle width direction from the upper impact bar. Since this bulging portion faces the upper impact bar in the vehicle width direction and bulges forward, the pressure receiving area of the rear reinforcement with respect to the upper impact bar can be increased. As a result, it is possible to receive an impact from the upper impact bar having a relatively large dimensional constraint without providing a separate member, and to propagate and distribute it to the inner panel. Further, as compared with a case where a further reinforcing member is provided between the upper impact bar and the rear reinforcement, it is possible to suppress an increase in cost, an increase in weight, and an increase in the number of assembly steps.

In addition, when the rear reinforcement layout is obliquely arranged so as to protrude forward as it goes to the lower side due to the door structure, when both impact bars receive an impact from the side of the vehicle, As a result of being able to receive the impact generated at the rear ends of both impact bars as much as possible on the same vertical line, the pressure receiving strength by both impact bars is increased. Further, with respect to the upper impact bar, it is possible to secure a longer pressure receiving area in the front-rear direction, and it is possible to increase the pressure receiving strength from this point .

Further, the bulging portion is curved around the center of the arc disposed behind the connecting wall portion , and the bulging portion is formed in an arc shape, so that buckling with respect to a load in the vehicle width direction is less likely to occur.

  As described above, according to the present invention, it is possible to receive the force that the upper impact bar moves in the vehicle width direction at the bulging portion and to propagate and distribute it to the inner panel. It is possible to propagate the impact applied to the entire inner panel as much as possible, and to achieve a significant impact absorbing and dispersing function.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a partial perspective view showing an external configuration of a door 10 according to an embodiment of the present invention, and FIG. 2 is a partial exploded perspective view of the door 10. In the following description, the door 10 is the left door of the vehicle, and the direction of each part will be described with reference to the vehicle body of the vehicle.

  Referring to these drawings, the illustrated door 10 includes an outer panel 11 that constitutes the outline of the vehicle body, and an inner panel 12 that is disposed opposite to the outer panel 11 and forms the surface of the passenger compartment. A door module (not shown) is mounted between the panels 11 and 12.

  As shown in FIG. 2, the inner panel 12 is provided with a hinge reinforcement (an example of a front reinforcement) 14 and a latch reinforcement (an example of a rear reinforcement) 15 on the front and rear, respectively. Yes. An upper impact bar 20 and a lower impact bar 21 are laid across the reinforcements 14 and 15. Each impact bar 20, 21 extends in the front-rear direction and is opposed to the upper and lower sides.

  The upper impact bar 20 has a front end 20 a fixed to the hinge reinforcement 14 via a bracket 22, and a rear end 20 b fixed to the latch reinforcement 15 via a bracket 23. The upper impact bar 20 is a reinforcing member obtained by crushing both ends 20a and 20b of a pipe-like metal member, and each end 20a and 20b is welded to a corresponding bracket 22 and 23, respectively.

  The lower impact bar 21 is a substantially H-steel structure, and both end portions 21a and 21b are each formed in a fan-like shape with free ends expanding.

  A pair of hinges 16 for connecting the door 10 to the vehicle body are fixed to the end walls of the hinge reinforcement 14 carrying the front end portions 20a, 21a of the impact bars 20, 21. Each hinge 16 is arranged up and down and connected to a fixed position of the vehicle body.

  A latch reinforcement 15 carrying rear end portions 20b, 21b of each impact bar 20, 21 carries a door latch 17 that engages and disengages with respect to a door striker 1 (see FIG. 1) provided on the vehicle body. Yes.

  FIG. 3 is a schematic cross-sectional view showing the main part of the door 10 according to FIG.

  With reference to the figure, the inner panel 12 is formed with an insertion / extraction hole 12a for inserting / removing the door striker 1, and the latch reinforcement 15 has an opening 15a at a position facing the insertion / extraction hole 12a. The door latch 17 can be engaged with and disengaged from the door striker 1 through the opening 15a.

  The principle configuration of the door latch 17 itself is known as disclosed in, for example, Patent Document 2 and will not be described in detail. However, the door latch 17 has a drive mechanism that receives power from the door module, and the door striker The lock / unlock for 1 is configured to be electrically controllable.

  Next, the latch reinforcement 15 will be described with reference to FIGS. 4 and 5. 4 is a perspective view showing a main part of a latch reinforcement 15 according to the door 10 of FIG. 1, and FIG. 5 is a side view thereof.

  With reference to these drawings, in the present embodiment, the latch reinforcement 15 is a structure having an outer shape in which the center side is recessed backward and curved, and the lower part protrudes forward, and the inner panel 12 A flange portion 15b to be joined, a connecting wall portion 15c that protrudes from the flange portion 15b toward the outer panel 11, and an attachment portion 15d that extends to the outer panel side edge of the connecting wall portion 15c and receives the upper impact bar. have.

  The flange portion 15b is generally curved along the contour of the latch reinforcement 15, and a concave portion 15e that avoids interference with a door module panel (not shown) is formed at the front center portion thereof.

  The connecting wall portion 15c extends along the vehicle width direction along the outline of the mounting portion 15d. Since the attachment part 15d is along the end wall shape of the rear part of the inner panel 12, the connection wall part 15c is also exhibiting the complicated shape which follows the outline. Each of the connecting wall portion 15c and the attachment portion 15d has undulations, and forms a ridge line 15f with the undulation shape.

  The mounting portion 15d is fixed to the inner panel 12 in surface contact with the rear side of the inner panel 12 as a whole, and receives the carrying surface 15g that carries the bracket 23 and the rear end portion 21b of the lower impact bar 21. And a support surface 15h. The rear side of the inner panel 12 undulates in the vehicle width direction and protrudes closer to the outer panel 11 than the flange portion 15b.

  Here, the connecting wall portion 15c in the present embodiment forms a bulging portion in which a portion 150 facing the upper impact bar 20 in the vehicle width direction bulges forward.

  Referring to FIG. 5, the bulging portion 150 is formed in a curved shape having an arc around a center O located behind the latch reinforcement 15 when viewed from the side. As described above, the entire shape of the latch reinforcement 15 is a shape in which the lower portion protrudes forward and the central portion curves backward, but the bulging portion 150 has a pressure receiving portion (impact The portion 151 that receives the pressure of the received upper impact bar protrudes forward so as to be horizontally adjacent to the vertical line LT passing through the folding start point 21P of the lower impact bar 21. Here, the “folding start point” refers to an arbitrary point assumed as a start point when the lower impact bar receives an impact and bends along the edge of the connection wall portion 15c of the rear reinforcement.

  Further, as shown in FIG. 3, the bulging portion 150 is inclined so as to go forward as it goes to the inner panel 12 side. Thereby, the impact resistance by the pressure receiving part 151 of the bulging part 150 increases.

  In this embodiment, the overall rigidity of the latch reinforcement 15 is set so as to obtain an impact resistance equal to or higher than that of the two impact bars 20 and 21. As a result, the load that cannot be absorbed by the impact bars 20 and 21 is transmitted to the inner panel 12 described above via the latch reinforcement 15.

  FIG. 6 is a front view of the bracket 23 that receives the upper impact bar according to the door 10 of FIG. 1, and FIG. 7 is a cross-sectional view of the bracket 23.

  Referring to these drawings, the bracket 23 is extended in a pair of flange portions 23a that are welded to the attachment portion 15d of the latch reinforcement 15 in a pair of upper and lower portions, and the opposite edge of the flange portion 23a. This is a sheet metal member that forms a raised portion 23b that rises toward the outer panel 11 side during assembly and a recess 23c that is formed at the center of the raised portion 23b and receives the rear end portion 20b of the upper impact bar 20.

  Referring to FIG. 3, the bracket 23 is disposed slightly closer to the rear end than the center in the front-rear direction of the attachment portion 15 d. Further, the mounting position of the rear end portion 20b of the upper impact bar 20 with respect to the bracket 23 is set such that the flatly crushed portion of the rear end portion 23b faces the pressure receiving portion 151 of the bulging portion 150. Yes.

  Next, the operation of this embodiment will be described.

  According to the above configuration, it is usually possible to open and close the door 10 around the hinge 16 shown in FIGS.

  Here, when an impact is received from the outer panel 11 when the vehicle is running (that is, when the door 10 is closed as shown in FIG. 3), the outer panel 11 is first deformed and the two impact bars 20 and 21 are deformed. Communicated. Here, since the rear end portion 20 b of the upper impact bar 20 is fixed to the latch reinforcement 15 via the bracket 23, the impact transmitted to the upper impact bar 20 is first transmitted to the bracket 23. This impact is absorbed by the bracket 23 by deforming the bracket 23, but when the bracket 23 is completely retracted, the rear end portion 20 b of the upper impact bar 20 is formed on the latch reinforcement 15. It contacts the pressure receiving portion 151 of the bulging portion 150. Here, in the present embodiment, the pressure receiving portion 151 of the bulging portion 150 faces the upper impact bar 20 in the vehicle width direction and bulges forward, so that the latch reinforcement 15 for the upper impact bar 20 is expanded. The pressure receiving area can be widened. As a result, it is possible to propagate and disperse the impact from the upper impact bar 20 having relatively large dimensional constraints to the inner panel 12 without providing a separate member. Further, as compared with the case where a further reinforcing member is provided between the upper impact bar 20 and the latch reinforcement 15, it is possible to suppress an increase in cost, an increase in weight, and an increase in the number of assembly steps.

  Further, in this embodiment, the pressure receiving portion 151 of the bulging portion 150 protrudes forward so as to be horizontally close to the vertical line LT passing through the folding start point 21P of the lower impact bar 21, so that the door 10 4 and 5, when the layout of the latch reinforcement 15 is obliquely arranged so as to protrude forward as it goes to the lower side, both the impact bars 20, 21 As a result of being able to receive the impact generated at the rear ends of both impact bars 20 and 21 as much as possible on the same vertical line LT when receiving an impact from the sides of the two bars, the pressure receiving strength from both impact bars 20 and 21 Will increase. Further, with respect to the upper impact bar 20, it is possible to secure a longer pressure receiving area in the front-rear direction, and it is possible to increase the pressure receiving strength from this point.

  Further, in the present embodiment, the bulging portion 150 is curved around the arc center O disposed rearward of the connecting wall portion, so that buckling with respect to a load in the vehicle width direction is less likely to occur.

  As described above, according to the present embodiment, the force that the upper impact bar 20 moves in the vehicle width direction can be received by the bulging portion 150 and can be propagated and distributed to the inner panel 12. The impact exerted on the bar 20 is propagated as much as possible to the entire inner panel 12, thereby achieving a remarkable effect that a high impact absorbing and dispersing function can be achieved.

  The above-described embodiments are merely examples of preferred specific examples of the present invention, and the present invention is not limited to the above-described embodiments.

  It goes without saying that various modifications are possible within the scope of the claims of the present invention.

It is a fragmentary perspective view which shows the external appearance structure of the vehicle door which concerns on one Embodiment of this invention. It is a partial exploded perspective view of the door. It is a cross-sectional schematic diagram which shows the principal part of the door which concerns on FIG. It is a perspective view which shows the principal part of the latch reinforcement which concerns on the door of FIG. It is the same side view. It is a front view of the bracket which receives the upper impact bar which concerns on the door of FIG. It is sectional drawing of the bracket.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle door 11 Outer panel 12 Inner panel 15 Latch reinforcement (an example of rear reinforcement)
15b Flange portion 15c Connecting wall portion 15d Mounting portion 20 Upper impact bar 20a Front end portion (an example of the other end portion)
20b Rear end (an example of one end)
21 Lower impact bar 21P Folding start point 150 Swelling portion 151 Pressure receiving portion LT Vertical line O Arc center

Claims (1)

An outer panel that forms the outer shell of the vehicle;
An inner panel that is disposed opposite to the outer panel and forms the interior of the vehicle,
A rear reinforcement disposed between the inner panel and the outer panel and fixed to the vehicle rear side of the inner panel;
An upper impact bar having one end fixed to the rear reinforcement and the other end protruding forward, and the rear reinforcement has a lower side positioned forward of the upper side. A flange portion that is disposed obliquely and is joined to the inner panel; a connecting wall portion that protrudes from the flange portion toward the outer panel; and the upper impact bar that extends to the outer panel side edge of the connecting wall portion. An attachment portion for receiving, at least a portion of the connecting wall portion facing the upper impact bar in the vehicle width direction forms a bulging portion bulging forward,
A rear end portion of a lower impact bar which is disposed below the upper impact bar and extends in the vehicle front-rear direction is fixed to a lower portion of the rear reinforcement. site undergoing bar, in side view, with projecting forwardly so as to close to the vertical line at the time of assembly through the intersection of the connecting wall portion of the upper end of the lower impact bar rear reinforcement The vehicular door is characterized in that the bulging portion is curved around an arc center disposed behind the connecting wall portion .

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