Side door

Abstract

To suppress intrusion of a side door into a cabin at the time of side collision while suppressing weight increase in the side door.SOLUTION: A side door 2 includes an outer panel 10, and an inner panel 20 arranged inside in a vehicle width direction of the outer panel 10. The inner panel 20 includes a tabular inner panel body member 21, and a tabular lower member 25. The lower member 25 contacts a lower side of a vehicle height direction of the inner panel body member 21, is arranged so as to partially overlap with the inner panel body member 21, and has a thickness thicker than a plate thickness of the inner panel body member 21 or has a tensile strength relatively higher than the inner panel body member 21. The inner panel body member 21 is formed of steel or an aluminum alloy. The lower part member 25 is formed of steel or an aluminum alloy.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a side door. [Background technology]

[0002] Vehicle side doors are required to absorb collision loads during a side collision. For example, Patent Document 1 discloses a side door in which a reinforcing member is arranged at the portion of the side door that contacts a vehicle body frame member, i.e., at the outer periphery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-017200 Summary of the Invention [Problem to be solved by the invention]

[0004] In the side door structure described in Patent Document 1, even if a collision load is applied to the side door, the reinforcing member suppresses buckling deformation of the outer periphery of the side door, and the collision load can be distributed and transmitted to the vehicle body frame members. In other words, the reinforcing member can increase the load transmitted to the vehicle body frame members out of the collision load applied to the side door. Therefore, the side door can absorb more of the collision load.

[0005] However, the side door described in Patent Document 1 does not include any specific suggestion on improving the strength of the side door itself against collision loads and suppressing deformation. As a result, there is a risk that the side door may intrude into the vehicle interior during a side collision. In addition, because a reinforcing member is added to the inner panel, there is a risk that the weight of the side door may increase.

[0006] An object of the present invention is to suppress intrusion of a side door into the vehicle interior during a side collision while suppressing an increase in weight. [Means for solving the problem]

[0007] The present invention provides a side door comprising an outer panel and an inner panel arranged inside the outer panel in the vehicle width direction, the inner panel having a plate-shaped inner panel main body member and a plate-shaped lower member arranged to contact the lower side of the inner panel main body member in the vehicle height direction, the plate thickness of which is thicker than the inner panel main body member or which has a relatively higher tensile strength than the inner panel main body member.

[0008] According to the present invention, the lower member has a relatively high tensile strength compared to the inner panel main body member. Therefore, deformation of the side door can be effectively suppressed in the event of a side collision centered on the lower member of the side door, i.e., in the event of a side collision by another vehicle. Furthermore, the tensile strength can be increased by changing the material of the lower member. In other words, the tensile strength of the lower member can be increased without complicating the shape, and an increase in the weight of the lower member can be suppressed.

[0009] The lower member may be separate from the inner panel main body member and arranged overlapping the inner panel main body member in the vehicle width direction, and the inner panel may have a joint portion joining the inner panel main body member and the lower member.

[0010] The above configuration can improve design freedom. If components with different tensile strengths were molded into a single integral component, it would be difficult to mold each component with a suitable processing method, which could result in reduced formability. However, if the components with different tensile strengths are formed separately, each component can be processed using a processing method suitable for it, which can improve formability. Therefore, the side door of the present invention can improve design freedom compared to when components with different tensile strengths are molded into a single integral component.

[0011] The lower member may be provided with an opening that is annular when viewed in the vehicle width direction.

[0012] According to the above configuration, the weight of the side door can be reduced.

[0013] The inner panel may include a first door beam disposed between the outer panel and the inner panel so as to extend along the vehicle length direction.

[0014] According to the above-described configuration, the rigidity of the inner panel can be improved, which makes it possible to suppress deformation of the inner panel and to suppress intrusion of the side door into the vehicle interior during a side collision.

[0015] The first door beam may be integrally formed as one member with the lower member and define a portion of the opening.

[0016] According to the above configuration, the number of parts of the side door can be reduced, which in turn reduces assembly costs and mold costs. Also, the lower member can be molded including the first door beam. In other words, molding costs can be reduced compared to when the first door beam and the lower member are molded separately.

[0017] The lower member may have a reinforcing member provided so as to divide the opening.

[0018] According to the above-described configuration, the weight of the lower member can be reduced by providing the opening, while the rigidity of the lower member can be improved by providing the reinforcing member, thereby reducing the weight of the side door and improving the rigidity of the side door.

[0019] The inner panel may further include a second door beam arranged between the outer panel and the inner panel to extend along the vehicle length direction, and the second door beam may have a relatively high tensile strength compared to the inner panel main body member.

[0020] According to the above-described configuration, the rigidity of the inner panel can be improved, which makes it possible to suppress deformation of the inner panel and to suppress intrusion of the side door into the vehicle interior during a side collision.

[0021] The inner panel main body member may have a panel portion extending along the vehicle length direction and the vehicle height direction, and a side wall portion extending from a periphery of the panel portion outward in the vehicle width direction. [Effects of the Invention]

[0022] According to the side door of the present invention, it is possible to suppress intrusion into the vehicle interior during a side collision while suppressing an increase in weight. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of a vehicle having a side door according to a first embodiment of the present invention. [Figure 2] 1 is an exploded perspective view of a side door according to a first embodiment of the present invention. [Figure 3] 1 is an exploded perspective view of an inner panel according to a first embodiment of the present invention. [Figure 4] 4 is an end view taken along line IV-IV in FIG. 2; [Figure 5] 3 is an end view taken along line VV in FIG. 2; [Figure 6] 6 is an end view taken along line VI-VI in FIG. 2; [Figure 7] 5 is a schematic diagram showing an overlapping portion between the lower member and the inner panel main body member. FIG. [Figure 8] FIG. 10 is a perspective view of a lower member in a second embodiment. [Figure 9] 9 is an end view taken along line IX-IX in FIG. 8; [Figure 10] FIG. 11 is a perspective view of a lower member in a third embodiment. [Figure 11] 11 is an end view taken along line XI-XI of FIG. 10. [Figure 12] FIG. 10 is a perspective view of an inner panel according to a fourth embodiment. [Figure 13] FIG. 10 is an exploded perspective view of an inner panel according to a fourth embodiment. [Figure 14] 14 is an end view taken along line XIV-XIV in FIG. 12. DETAILED DESCRIPTION OF THE INVENTION

[0024] (First embodiment) 1, a vehicle 1 includes a front door (side door) 2 and a rear door 3. In the following description, the front door 2 will be described, but the rear door 3 has a similar configuration. In this embodiment, the tip of the X-direction arrow points forward in the vehicle length direction, the tip of the Y-direction arrow points outward in the vehicle width direction, and the tip of the Z-direction arrow points upward in the vehicle height direction.

[0025] 2, the front door 2 includes an outer panel 10 and an inner panel 20. The outer panel 10 is disposed on the outer side in the vehicle width direction (Y direction) and forms a surface, and the inner panel 20 is disposed on the inner side of the outer panel 10 in the vehicle width direction (Y direction).

[0026] 3, the inner panel 20 includes an inner panel main body member 21 and a lower member 25. In this embodiment, the inner panel main body member 21 is plate-shaped and includes a window frame portion 21a in which a glass window is disposed and a lower portion 21b in which electronic devices and the like are disposed. The inner panel main body member 21 does not necessarily have to include the window frame portion 21a. The inner panel main body member 21 is disposed so as to overlap the upper side of the outer panel 10 when viewed from the vehicle width direction (Y direction).

[0027] The lower member 25 is disposed so as to overlap the lower side of the outer panel when viewed from the vehicle width direction (Y direction). The lower member 25 is also disposed so as to contact the lower side of the inner panel main body member 21 in the vehicle height direction (Z direction). In this embodiment, the lower member 25 is plate-shaped and is separate from the inner panel main body member 21. The lower member 25 is disposed so as to overlap the lower portion 21b in the vehicle width direction (Y direction).

[0028] In this embodiment, the inner panel main body member 21 and the lower member 25 are each made of an aluminum alloy. The plate thickness t2 (see FIG. 4) of the lower member 25 is thicker than the plate thickness t1 (see FIG. 4) of the inner panel main body member 21. Preferably, the plate thickness t1 (see FIG. 4) of the inner panel main body member 21 is 0.8 mm to 1.6 mm, and the plate thickness t2 (see FIG. 4) of the lower member 25 is 1.0 mm to 2.3 mm.

[0029] The inner panel body member 21 and the lower member 25 may each be made of steel. In this case, the lower member 25 has a relatively high tensile strength compared to the inner panel body member 21. Specifically, the tensile strength of the lower member 25 is 440 MPa to 1700 MPa, preferably 980 MPa to 1700 MPa, and more preferably 1180 MPa to 1700 MPa. The tensile strength of the inner panel body member 21 is 340 MPa to 440 MPa.

[0030] The inner panel body member 21 may be made of steel and the lower member 25 may be made of aluminum alloy. Alternatively, the inner panel body member 21 may be made of aluminum alloy and the lower member 25 may be made of steel.

[0031] The lower portion 21b includes a plate-shaped panel portion 21c extending inward in the vehicle width direction (Y direction) along the vehicle length direction (X direction) and the vehicle height direction (Z direction). An opening 22 is provided in the approximate center of the panel portion 21c. In other words, the lower portion 21b is annular.

[0032] 4 to 6, panel portion 21c is provided with sidewall portions 21d that extend outward in the vehicle width direction (Y direction) from the front side in the vehicle length direction (X direction), the lower side in the vehicle height direction (Z direction), and the rear side in the vehicle length direction (X direction) around panel portion 21c. Sidewall portion 21d includes a front sidewall portion 21d1 located on the front side in the vehicle length direction (X direction), a lower sidewall portion 21d2 located on the lower side in the vehicle height direction (Z direction), and a rear sidewall portion 21d3 located on the rear side in the vehicle length direction (X direction).

[0033] In this embodiment, the lower portion 21b is provided with an outer wall portion 21e extending in a plate shape from the tip of the side wall portion 21d downward in the vehicle length direction (X direction) and vehicle height direction (Z direction). The outer wall portion 21e includes a front outer wall portion 21e1, a lower outer wall portion 21e2, and a rear outer wall portion 21e3. The front outer wall portion 21e1 extends from the tip of the front side wall portion 21d1 forward in the vehicle length direction (X direction) and outward in the vehicle width direction (Y direction). The lower outer wall portion 21e2 extends from the tip of the lower side wall portion 21d2 downward in the vehicle height direction (Z direction) and outward in the vehicle width direction (Y direction). The rear outer wall portion 21e3 extends from the tip of the rear side wall portion 21d3 rearward in the vehicle length direction (X direction) and outward in the vehicle width direction (Y direction).

[0034] Additionally, lower portion 21b is provided with joint portion 21f, which extends outward in a plate shape from the tip of outer wall portion 21e. Joint portion 21f includes front joint portion 21f1 located on the front side in the vehicle length direction (X direction), lower joint portion 21f2 located on the lower side in the vehicle height direction (Z direction), and rear joint portion 21f3 located on the rear side in the vehicle length direction (X direction).

[0035] 3, the lower member 25 is substantially trapezoidal when viewed in the vehicle width direction (Y direction). The lower member 25 includes a horizontal member 25a, a door beam (first door beam) 25b, and vertical members 25c and 25d.

[0036] The horizontal member 25a constitutes the lower side of the lower member 25 in the vehicle height direction (Z direction), and extends in the vehicle length direction (X direction).

[0037] The door beam 25b constitutes the upper side of the lower member 25 in the vehicle height direction (Z direction) and extends in the vehicle length direction (X direction). The door beam 25b is configured so that the front side in the vehicle length direction (X direction) is higher in the vehicle height direction (Z direction) than the rear side.

[0038] The vertical member 25c constitutes the front side of the lower member 25 in the vehicle length direction (X direction) and extends in the vehicle height direction (Z direction). The vertical member 25d constitutes the rear side of the lower member 25 in the vehicle length direction (X direction) and extends in the vehicle height direction (Z direction).

[0039] In this embodiment, the door beam 25b is configured as one member integral with the lower member 25. The door beam 25b may be configured as a separate member from the lower member 25.

[0040] An opening 26 is provided in the lower member 25 so as to be annular when viewed in the vehicle width direction (Y direction). Specifically, the opening 26 is defined by a horizontal member 25a, a door beam 25b, and vertical members 25c and 25d.

[0041] 4 and 5, the door beam 25b has a bellows shape in a cross section perpendicular to the vehicle length direction (X direction). The door beam 25b is disposed between the outer panel 10 and the inner panel 20.

[0042] 7, the lower member 25 is disposed so as to partially overlap the inner panel main body member 21. The hatched areas in FIG. 7 indicate the locations where the lower member 25 and the inner panel main body member 21 overlap. Specifically, the front joint portion 21f1 of the inner panel main body member 21 and the upper portion of the vertical member 25c of the lower member 25 in the vehicle height direction (Z direction) overlap as indicated by the hatched line S1. The front joint portion 21f1 of the inner panel main body member 21 and the rear portion of the vertical member 25c of the lower member 25 in the vehicle length direction (X direction) overlap as indicated by the hatched line S2. The lower joint portion 21f2 of the inner panel main body member 21 and the upper portion of the horizontal member 25a of the lower member 25 in the vehicle height direction (Z direction) overlap as indicated by the hatched line S3. The rear joint portion 21f3 of the inner panel main body member 21 and the front portion of the vertical member 25d of the lower member 25 in the vehicle length direction (X direction) overlap as shown by the diagonal line S4. The rear joint portion 21f3 of the inner panel main body member 21 and the upper portion of the vertical member 25d of the lower member 25 in the vehicle height direction (Z direction) overlap as shown by the diagonal line S5.

[0043] The inner panel main body member 21 and the lower member 25 are joined by spot welding at the overlapping portions (hatched portions in FIG. 7 ) of the inner panel main body member 21 and the lower member 25. In other words, the inner panel 20 has joints W1 to W7 that mechanically join the inner panel main body member 21 and the lower member 25. The joints W1 and W2 are located in an overlapping portion (hatched line S1) between the front joint 21f1 of the inner panel main body member 21 and the upper portion of the vertical member 25c of the lower member 25 in the vehicle height direction (Z direction). The joint W3 is located below, in the vehicle height direction (Z direction), the overlapping portion (hatched line S2) between the front joint 21f1 of the inner panel main body member 21 and the rear portion of the vertical member 25c of the lower member 25 in the vehicle length direction (X direction). The joint W4 is located approximately in the center in the vehicle length direction (X direction) of the portion (diagonal line S3) where the lower joint 21f2 of the inner panel main body member 21 and the upper portion of the horizontal member 25a of the lower member 25 in the vehicle height direction (Z direction) overlap. The joint W5 is located below the portion (diagonal line S4) where the rear joint 21f3 of the inner panel main body member 21 and the front portion of the vertical member 25d of the lower member 25 in the vehicle length direction (X direction) overlap. The joints W6 and W7 are located in the portion (diagonal line S5) where the rear joint 21f3 of the inner panel main body member 21 and the upper portion of the vertical member 25d of the lower member 25 in the vehicle height direction (Z direction) overlap.

[0044] The inner panel main body member 21 and the lower member 25 may be joined at the joints W1 to W7 by rivets, adhesive, friction stirring, or laser.

[0045] 4 to 6, the outer panel 10 is attached so as to follow the periphery of the lower member 25 and the door beam 25b. In other words, the outer panel 10 is attached by the lower member 25 so as to follow the inner side in the vehicle width direction (Y direction), and the collision load applied to the outer panel 10 can be transmitted by the lower member 25.

[0046] According to the front door 2 of this embodiment, the lower member 25 has a relatively high tensile strength compared to the inner panel main body member 21. Therefore, in the case of a side collision centered on the lower member 25 of the front door 2, that is, in the case of a side collision by another vehicle, deformation of the front door 2 can be effectively suppressed. Furthermore, the tensile strength can be increased by changing the material of the lower member 25. In other words, the tensile strength of the lower member can be increased without complicating the shape, and an increase in the weight of the lower member can be suppressed.

[0047] Furthermore, the inner panel main body member 21 and the lower member 25 are configured separately. If members with different tensile strengths were molded into a single integral member, it would be difficult to mold each member with a processing method appropriate for that member, which could result in reduced formability. However, if the members with different tensile strengths are configured separately, each member can be processed using a processing method appropriate for that member, which could improve formability. Therefore, the front door 2 of this embodiment can offer greater design freedom than if the members with different tensile strengths were molded into a single integral member.

[0048] The provision of the door beam 25b can improve the rigidity of the inner panel 20. Therefore, deformation of the inner panel 20 can be suppressed, and intrusion of the front door 2 into the vehicle interior during a side collision can be suppressed.

[0049] Since the opening 26 is provided in the lower member 25, the weight of the front door 2 can be reduced.

[0050] Because the door beam 25b is configured as a single member integral with the lower member 25, the number of parts of the front door 2 can be reduced. This reduces assembly costs and mold costs. Also, the lower member 25 can be molded including the door beam 25b. In other words, molding costs can be reduced compared to when the door beam 25b and the lower member 25 are molded separately.

[0051] The lower member 25 may be integrally formed with the inner panel main body member 21. In this case, the inner panel 20 is formed using a tailored blank. That is, the inner panel 20 may be formed by previously integrating members having different thicknesses or tensile strengths by welding or the like, and then press-forming the integrated members.

[0052] (Second embodiment) 8 and 9, the configuration of the front door 2 according to the second embodiment of the present invention differs from that of the first embodiment in the following respects: The other configurations of the second embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0053] 8, the lower member 25 in the second embodiment includes two reinforcing members 40, 41 extending in the vehicle height direction (Z direction) so as to divide the opening 26. Specifically, the reinforcing members 40, 41 extend in the vehicle height direction (Z direction) so as to connect the cross member 25a and the door beam 25b. In the vehicle length direction (X direction), the reinforcing member 40 is disposed forward of the reinforcing member 41.

[0054] 9, each of the reinforcing members 40, 41 has a bellows shape in a cross section perpendicular to the vehicle height direction (Z direction). Therefore, the rigidity of the reinforcing members 40, 41 can be improved.

[0055] The outer panel 10 is attached so as to fit along the reinforcing members 40, 41. Therefore, the collision load applied to the outer panel 10 can be transmitted by the lower member 25 including the reinforcing members 40, 41.

[0056] According to the second embodiment, the weight of the lower member 25 can be reduced by providing the opening 26, while the rigidity of the lower member 25 can be improved by the reinforcing members 40, 41. Therefore, the rigidity of the front door 2 can be improved while the weight of the front door 2 is reduced.

[0057] (Third embodiment) 10 and 11, the configuration of the front door 2 according to the third embodiment of the present invention differs from that of the first embodiment in the following respects: The other configurations of the third embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0058] 10, the lower member 25 in the third embodiment includes a reinforcing member 42 extending in the vehicle length direction (X direction) so as to divide the opening 26. Specifically, the reinforcing member 42 extends in the vehicle length direction (X direction) so as to connect the vertical members 25c and 25d.

[0059] 11, the reinforcing member 42 has a bellows shape in a cross section perpendicular to the vehicle length direction (X direction), which can improve the rigidity of the reinforcing member 42.

[0060] The outer panel 10 is attached so as to fit along the reinforcing member 42. Therefore, the collision load applied to the outer panel 10 can be transmitted by the lower member 25 including the reinforcing member 42.

[0061] According to the third embodiment, the weight of the lower member 25 can be reduced by providing the opening 26, while the rigidity of the lower member 25 can be improved by the reinforcing member 42. Therefore, the rigidity of the front door 2 can be improved while the weight of the front door 2 is reduced.

[0062] (Fourth embodiment) 12 to 14, the configuration of the front door 2 according to the fourth embodiment of the present invention differs from that of the first embodiment in the following respects: The other configurations of the fourth embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0063] 12 and 13, the inner panel 20 in the fourth embodiment includes, in addition to the door beam 25b, a door beam (second door beam) 50. The door beam 50 is formed as a separate body from each of the inner panel main body member 21 and the lower member 25, and is disposed so as to extend along the vehicle length direction (X direction).

[0064] In the fourth embodiment, the door beam 50 is made of an aluminum alloy and is formed from an extruded shape member. Therefore, the door beam 50 has a relatively high tensile strength compared to the inner panel body member 21.

[0065] The door beam 50 may be made of steel. Even in this case, the door beam 50 has a relatively high tensile strength compared to the inner panel body member 21. Specifically, the strength of the door beam 50 is 1180 MPa to 1700 MPa, preferably 1350 MPa to 1700 MPa, and more preferably 1470 MPa to 1700 MPa.

[0066] 14, the door beam 50 is disposed above the lower member 25 in the vehicle height direction (Z direction) with respect to the inner panel main body member 21. The door beam 50 is also disposed between the outer panel 10 and the inner panel 20.

[0067] The door beam 25b and the door beam 50 are disposed at approximately the same position in the vehicle width direction (Y direction). Therefore, the outer panel 10 is attached so as to be aligned with the reinforcing member 42. Therefore, the collision load applied to the outer panel 10 can be transmitted by the lower member 25 including the reinforcing member 42.

[0068] The door beam 50 has a bellows shape in a cross section perpendicular to the vehicle length direction (X direction), which can improve the rigidity of the door beam 50.

[0069] According to the front door 2 of the fourth embodiment, the rigidity of the inner panel can be improved, which can suppress deformation of the inner panel and prevent the side door from entering the vehicle interior during a side collision. [Explanation of symbols]

[0070] 1 vehicle 2 Front door (side door) 3 Rear door 10 Outer panel 20 Inner panel 21 Inner panel body member 21a Window frame 21b Lower part 21c Panel section 21d Side wall part 21d1 Front side wall 21d2 Lower side wall 21d3 Rear side wall 21e Exterior wall 21e1 Front outer wall 21e2 Lower outer wall 21e3 Rear outer wall 21f joint 21f1 Front joint 21f2 Lower joint 21f3 rear joint 22 Aperture 25 Lower member 25a Horizontal member 25b Door beam (first door beam) 25c, 25d Vertical members 26 Aperture 40,41 Reinforcement member 50 Door beam (second door beam) W1~W7 joint

Claims

1. Outer panel and The inner panel is positioned on the inside of the outer panel in the vehicle width direction. Equipped with, The aforementioned inner panel is A plate-shaped inner panel main body member, Plate-shaped lower member and Equipped with, The lower member is in contact with the lower side of the inner panel main body member in the vehicle height direction along the entire length of the inner panel main body member in the vehicle length direction, and is thicker than the thickness of the inner panel main body member, or has a relatively higher tensile strength compared to the inner panel main body member. The inner panel main body member is made of steel or aluminum alloy. The lower member is made of steel or aluminum alloy. The lower member is provided with an opening that is annular when viewed from the vehicle width direction, and this is a side door.

2. The lower member is separate from the inner panel main body member and is arranged overlapping the inner panel main body member in the vehicle width direction. The side door according to claim 1, wherein the inner panel has a joint portion that connects the inner panel main body member and the lower member.

3. The side door according to claim 2, wherein the inner panel comprises a first door beam arranged to extend along the length of the vehicle.

4. The side door according to claim 3, wherein the first door beam is configured integrally with the lower member as a single component and defines a part of the opening.

5. The side door according to claim 3 or 4, wherein the lower member has a reinforcing member provided to divide the opening.

6. The inner panel further comprises a second door beam positioned to extend along the vehicle's length, The side door according to any one of claims 1 to 5, wherein the second door beam has a relatively higher tensile strength than the inner panel body member.

7. The aforementioned inner panel main body member is A panel portion extending along the vehicle length direction and the vehicle height direction, A side wall portion extending outward in the vehicle width direction from the periphery of the panel portion and A side door according to any one of claims 1 to 6, having the features of a side door according to any one of claims 1 to 6.

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