Vehicle structure

Abstract

A vehicle structure is provided with: a skeleton member integrally molded by die casting and having a shape of an open cross-section with an opening in at least one direction; a cushion member disposed between the skeleton member and a tire and attached to the skeleton member to form a closed cross-section or a semi-closed cross-section with a portion of the open cross-section of at least a portion of the skeleton member; and a sound absorbing member disposed in the closed cross section or the semi-closed cross section.

Description

Technical Field

[0001] The present invention relates to a vehicle structure. Background Art

[0002] Japanese Unexamined Patent Application Publication No. 2012-8458 discloses a vehicle structure in which a fender liner is provided with a through-hole, and a membrane or plate-shaped vibrator is vibratably fixed to one surface of the fender liner on the side opposite the tire to cover the through-hole. In the vehicle structure described in JP 2012-8458A, sound absorption is achieved by resonating sound in an air chamber enclosed by the vibrator and the fender liner. Summary of the Invention

[0003] Vibration and engine noise from internal combustion engines are being replaced by motor noise, with high-frequency sounds becoming increasingly dominant. Meanwhile, tire noise is becoming more noticeable due to improvements in quietness. Simultaneously, in vehicle architecture, increasing the tire's turning angle to reduce the minimum turning radius is prioritized to improve product appeal, limiting the space available for sound-absorbing structures. The vehicle structure described in JP 2012-8458A requires additional space for an air chamber, leaving room for improved use of sound-absorbing space.

[0004] The present invention provides a vehicle structure capable of effectively utilizing dead space and achieving a sound absorption effect.

[0005] A vehicle structure according to a first aspect is provided with: a frame member integrally molded by die-casting and having a shape of an open cross section with an opening in at least one direction; a cushion member configured to be arranged between the frame member and a tire and attached to the frame member so as to form a closed cross section or a semi-closed cross section with a portion of the open cross section of at least a portion of the frame member; and a sound absorbing member arranged in the closed cross section or the semi-closed cross section.

[0006] In the vehicle structure according to the first aspect, when the cushion member is attached to the frame member between the frame member and the tire, the sound absorbing member is arranged in a closed or semi-closed cross-section formed by the portion of the frame member's open cross-section, eliminating the need for a separate space for the sound absorbing member. Consequently, the dead space formed when the cushion member is attached to the frame member can be effectively utilized, achieving a sound absorption effect that absorbs noise from the tire, etc. Note that the term "semi-closed cross-section" as used herein refers to a structure in which, while a closed cross-section is formed by the cushion member and the portion of the frame member's open cross-section, the structure does not necessarily have a completely closed cross-section, but rather constitutes an entirely closed cross-section structure, even though gaps, openings, or similar features may partially exist.

[0007] In the vehicle structure according to the second aspect, in the configuration according to the first aspect, the sound absorbing member may be attached to the cushion member.

[0008] In the vehicle structure according to the second aspect, since the sound absorbing member is attached to the cushion member, when noise propagates in the order of the tire, the cushion member, and the open cross-section of the frame member, resonance and vibration in the closed or semi-closed cross-section formed by the cushion member and part of the open cross-section of the frame member can be reduced more quickly.

[0009] In the vehicle structure according to the third aspect, in the configuration according to the first aspect, the sound absorbing member may be attached to the framework member.

[0010] In the vehicle structure according to the third aspect, since the sound absorbing member is attached to the frame member, the pad member can be attached to the frame member after the sound absorbing member is attached to the frame member. This can improve the ease of attaching the sound absorbing member.

[0011] In the vehicle structure according to the fourth aspect, in the configuration according to the first aspect, the sound absorbing member may be attached to both the pad member and the frame member.

[0012] In the vehicle structure according to the fourth aspect, since the sound absorbing member is attached to both the pad member and the frame member, the sound absorbing member can be attached more securely in the closed or semi-closed cross section.

[0013] In the vehicle structure according to the fifth aspect, in the configuration according to the first aspect, the sound absorbing member may be configured to be arranged at a position overlapping with the tire in a plan view.

[0014] In the vehicle structure according to the fifth aspect, since the sound absorbing member is arranged at a position overlapping with the tire in a plan view, the sound absorbing member can be arranged in a portion that has a greater impact on the occupants in the vehicle cabin, thereby improving the sound absorption effect on the occupants.

[0015] In the vehicle structure according to the sixth aspect, in the configuration according to any one of the first to fifth aspects, the frame member may be a frame portion extending in the vehicle front-rear direction in the wheel house.

[0016] In the vehicle structure according to the sixth aspect, since the frame member is a frame portion extending along the wheel house in the vehicle longitudinal direction, the sound absorbing member can be arranged in a wider range facing the tire. This can further improve the sound absorption effect.

[0017] In the vehicle structure according to the seventh aspect, in the configuration according to the sixth aspect, the frame member may include two or more chambers partitioned by ribs in the vehicle height direction, and the sound absorbing member may be arranged in an upper chamber including at least a chamber located uppermost in the vehicle height direction among the two or more chambers.

[0018] In the vehicle structure according to the seventh aspect, the frame member may include two or more chambers partitioned by ribs in the vehicle height direction, and the sound absorbing member may be arranged in each of the chambers partitioned by the ribs. Thus, the sound absorbing member can be positioned by the ribs. Furthermore, since the sound absorbing member is arranged in the upper chamber, which includes at least the uppermost chamber of the two or more chambers in the vehicle height direction, the sound absorbing member can be positioned closer to the occupants in the vehicle cabin, further enhancing the sound absorption effect on the occupants.

[0019] In the vehicle structure according to the eighth aspect, in the configuration according to the seventh aspect, the framework member may include two chambers partitioned by the rib in the vehicle height direction, and the sound absorbing member may be arranged in the chamber located on the upper side in the vehicle height direction.

[0020] In the vehicle structure according to the eighth aspect, since the two chambers separated by the ribs are arranged in the vehicle height direction, the sound absorbing member can be positioned by the ribs. Furthermore, since the sound absorbing member is arranged in the chamber located on the upper side in the vehicle height direction, the sound absorbing member can be placed closer to the passenger in the vehicle cabin, thereby further improving the sound absorption effect on the passenger.

[0021] In the vehicle structure according to the ninth aspect, in the configuration according to the second aspect or the fourth aspect, the cushion member may include ribs on a surface on a side to which the sound absorbing member is attached.

[0022] In the vehicle structure according to the ninth aspect, since the cushion member includes the ribs on the surface side to which the sound absorbing member is attached, the ribs can be used to set the attachment position of the sound absorbing member when attaching the sound absorbing member, thereby improving the ease of attaching the sound absorbing member.

[0023] As described above, the vehicle structure according to the present invention can effectively utilize the dead space and obtain the sound absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, wherein like numerals refer to like elements, and wherein:

[0025] Figure 1 is a perspective view schematically illustrating an example of a vehicle front structure including a framework member of a vehicle structure according to an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram showing Figure 1 a right side view of an example of a vehicle front structure;

[0027] Figure 3 It is a schematic diagram showing Figure 1An example of a vehicle front structure in a front cross-sectional view near the tire;

[0028] Figure 4 This diagram schematically shows how the tire should be installed. Figure 1 An example of a vehicle front structure in a side view near a tire;

[0029] Figure 5 It is a schematic diagram showing Figure 1 A bottom view of an example of a front structure of a vehicle;

[0030] Figure 6 is a side view schematically illustrating a modification 1 of an attachment position of a sound absorbing member;

[0031] Figure 7 is a side view schematically illustrating a modification 2 of the attachment position of the sound absorbing member;

[0032] Figure 8 is a front sectional view of a main portion schematically illustrating a modification 3 of the attachment position of the sound absorbing member; and

[0033] Figure 9 It is a front sectional view of a main portion, schematically illustrating Modification 4 of the attachment position of the sound absorbing member. DETAILED DESCRIPTION

[0034] The vehicle structure according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In this specification and the accompanying drawings, components having substantially the same functional structure are referred to by the same reference numerals to avoid repetition. In the accompanying drawings, the arrow "front" (FR) appropriately shown in each figure indicates the front side in the front-to-rear direction of the vehicle, and the arrow "up" (UP) indicates the upper side in the height direction of the vehicle. The arrow "left" (LH) indicates the left side in the width direction of the vehicle, and the arrow "inside" (IN) indicates the inner side in the width direction of the vehicle. In the following, when only the front-to-rear direction, the vertical direction, and the lateral direction are used for description, unless otherwise specified, it should indicate the front and rear in the front-to-rear direction of the vehicle, the up and down in the height direction of the vehicle, and the left and right in the left-to-right direction of the vehicle (the width direction of the vehicle).

[0035] Construction of the vehicle's front structure

[0036] First, as an example of the vehicle structure according to the embodiment of the present invention, the configuration of a vehicle front structure 10 will be described. Figure 1 is a perspective view schematically illustrating an example of the vehicle front structure 10 .

[0037] Figure 1A schematic diagram shows a vehicle front structure 10, which illustrates the front structure of the vehicle. In this embodiment, the vehicle is, for example, a battery electric vehicle (BEV), a fuel cell electric vehicle (FCEV), a hybrid electric vehicle (HEV), or a plug-in hybrid electric vehicle (PHEV) that runs on power generated by a power unit.

[0038] like Figure 1 As shown in the figure, the vehicle front structure 10 includes a pair of left and right front longitudinal beams 12, which are front skeleton members of the vehicle and are arranged on both sides of the front part of the vehicle in the vehicle width direction. The front longitudinal beams 12 extend in the vehicle front-rear direction, and the ends of the front longitudinal beams 12 on the vehicle rear side are connected to the cross beam 16. The vehicle front end portions of the front longitudinal beams 12 are connected to a front bumper reinforcement (omitted from the figure; hereinafter referred to as "bumper RF") arranged in the vehicle width direction. In the present embodiment, as an example, the front longitudinal beam 12 includes a crash box 13 serving as an energy absorbing member at the front end portion connected to the bumper RF. Note that in the present embodiment, the crash box 13 is described as a component separate from the bumper RF, but the two can be integrated into a single structure. In Figure 1 In the figure, the crash box 13 is shown only on the right side, but in reality, the crash box 13 is also provided on the left side.

[0039] Tires 30 (see FIG. 1 ) are mounted on the outer sides of the pair of front side members 12 in the vehicle width direction. Figure 3 ) wheel housings 14, and the left and right wheel housings 14 are connected by a cross member 16. The front longitudinal member 12 is provided in the wheel housing 14 and is located on an extension line of a longitudinal member (not shown) constituting a lower side frame of the vehicle.

[0040] A fender upper member 18 is positioned on the rear side of each of the left and right front side members 12, on the vehicle widthwise outer sides and the vehicle heightwise upper sides. The fender upper members 18 form the upper side framework of the vehicle front structure 10 and extend along the front side members 12 in the vehicle fore-aft direction. Both the front side members 12 and the fender upper members 18 have a generally rectangular cross-sectional shape with an opening on the vehicle widthwise outer sides. In other words, they have a generally rectangular cross-sectional shape with an opening on the vehicle widthwise outer sides. The openings in the fender upper members 18 are not shown in either figure, but the fender upper members 18 have a vibration damping structure, as will be described later, in much the same manner as the front side members 12.

[0041] A pair of left and right fender fenders 20 are positioned on the vehicle widthwise outer sides of the front longitudinal members 12 and on the vehicle widthwise inner sides of the fender upper members 18. The fender fenders 20 have upper ends joined to the fender upper members 18 and lower ends joined to the front longitudinal members 12. Suspension support covers 22 are integrally formed with the wheel housing 14. The suspension support covers 22 are positioned above the vehicle, outboard of the front longitudinal members 12 in the vehicle widthwise direction, with their lower sides joined to the fender fenders 20. A through-hole 22A is formed in the upper end surface of the suspension support covers 22, through which the upper end of a suspension (not shown) is positioned. The fender fenders 20 are formed to protrude inward in the vehicle widthwise direction, and the protruding portion forms the wheel housing 14, which rotatably accommodates the tire 30.

[0042] The dash panel 24 is located on the vehicle rear side of the front side members 12, between the pair of left and right fender upper members 18. The dash panel 24 is a member that separates the space housing the power unit (not shown) from the vehicle cabin (not shown). It extends in the vehicle width and height directions, with the panel thickness serving as the vehicle front-rear direction. The dash panel 24 has end portions connected to the fender fenders 20 in the vehicle width direction and an upper end connected to the cross member 16.

[0043] A rear end portion 20A of the fender apron 20 located behind the wheel house 14 in the vehicle longitudinal direction extends in the vehicle longitudinal direction and is connected to a rocker (not shown) constituting a frame of the vehicle body side.

[0044] The suspension support cover 22 is provided so as to protrude in a generally cylindrical shape toward the upper side of the vehicle from the wheel housing 14 of the fender apron 20. The suspension support cover 22 houses a shock absorber and springs constituting a suspension (not shown) supporting tires housed in the wheel housing 14 and serving as front wheels.

[0045] In the vehicle front structure 10 of the present embodiment, as an example, Figure 1 The illustrated pair of front side members 12, wheel housings 14, cross member 16, fender upper member 18, fender apron 20, suspension support cover 22, and dash panel 24 are integrally formed by aluminum die casting. Note that the crash box 13 may or may not be integrally formed with the vehicle front structure 10. The vehicle front structure 10 may be integrally formed in each of the left and right halves.

[0046] Next, the vibration damping structure provided in the front side member 12 will be described. Figure 2 It is a schematic diagram showing Figure 1 A right side view of an example of the vehicle front structure 10 is shown in FIG. Figure 1 and Figure 2As shown in the figure, the front side member 12 of this embodiment extends in the vehicle front-rear direction (the direction in which impact loads are input), as described above, and has an opening 12A provided on the vehicle widthwise outer side. The front side member 12 includes an upper wall portion 121, a lower wall portion 122, and an inner wall portion 123. The inner wall portion 123 is arranged on the vehicle widthwise inner side and connects the vehicle widthwise inner end portions of the upper wall portion 121 and the lower wall portion 122.

[0047] In this embodiment, as an example, a bulkhead 124 is provided at a substantially central portion of the front side member 12 in the vehicle height direction. The bulkhead 124 serves as a rib that defines two adjacent chambers in the vehicle height direction. The front side member 12 includes two chambers located on the upper and lower sides, namely, an upper chamber 130 and a lower chamber 132, which are separated in the vehicle height direction by the bulkhead 124.

[0048] The front side member 12 includes a plurality of vertical partitions 125 serving as ribs arranged in a row to form a plurality of compartments in the vehicle front-rear direction. The front side member 12 includes a plurality of compartments partitioned in the vehicle front-rear direction by the vertical partitions 125. That is, the upper chamber 130 and the lower chamber 132 each include a plurality of compartments arranged in the vehicle front-rear direction.

[0049] As described above, the front side member 12 is provided with a plurality of compartments arranged in the vehicle longitudinal direction and the vehicle height direction. Therefore, when an impact load is applied to the front side member 12 (along the vehicle longitudinal direction), a breaking load corresponding to the number of compartments is generated, absorbing the impact energy in the process.

[0050] Figure 3 It is a schematic diagram showing Figure 1 The illustrated example of the vehicle front structure 10 is a front cross-sectional view near the tire 30. Figure 3 As shown, the vehicle front structure 10 includes a cushion member 40 formed of a plate member and arranged between the front side member 12 and the tire 30. The cushion member 40 includes a first cushion member 40A that extends in the vehicle height direction at a position facing the opening 12A of the front side member 12. The cushion member 40 also includes a second cushion member 40B that extends from the upper end of the first cushion member 40A along the curve in the wheel house 14.

[0051] The first cushion member 40A is attached to form a closed cross section with a portion of the open cross section of the front side member 12. Specifically, the closed cross section is formed by contact between one surface 41 of the cushion member 40, which faces away from the tire 30, and the upper and lower walls 121, 122 of the front side member 12, as well as the end surface of the partition 124 on the opening 12A side. In this embodiment, the end surface of the partition 124 on the opening 12A side also contacts one surface 41 of the cushion member 40, but the present invention is not limited to this. The end surface of the partition 124 does not necessarily need to contact one surface 41 of the cushion member 40.

[0052] In this embodiment, the first cushion member 40A is attached to form a closed cross section with a portion of the open cross section of the front side member 12, but it is not necessary to attach it to form a strictly closed cross section. For example, it may be attached to form a semi-closed cross section with a gap, an opening, etc. partially present.

[0053] The second pad member 40B is attached to face the inner surface 14A (the surface on the tire 30 side) of the wheel cover 14 to form a space with the inner surface 14A. Figure 2 As shown, the inner surface 14A is provided with an extended upper wall portion 141, an extended lower wall portion 144, and an extended bulkhead 142. These are ribs extending from the upper wall portion 121, the lower wall portion 122, and the bulkhead 124 of the front side member 12, respectively, and curving along the inner surface 14A. In other words, the inner surface 14A of the wheelhouse 14 further forms two chambers, separated by an upper side and a lower side in the vehicle height direction. Although not shown, multiple ribs following the curve of the inner surface 14A may be formed on the upper side of the extended upper wall portion 141 on the inner surface 14A of the wheelhouse 14.

[0054] The second cushion member 40B is attached to form a semi-closed cross section with the inner surface 14A of the wheel cover 14. Figure 3 As shown, the through hole 22A of the suspension support cover 22 is formed on the upper end surface of the fender apron 20 forming the wheel house 14. Therefore, the cross section formed by the second pad member 40B and the inner surface 14A of the wheel house 14 is a semi-closed cross section in which gaps, openings, etc. partially exist.

[0055] like Figure 3 As shown, the second pad member 40B includes first and second ribs 42 and 44 on one surface 41 that protrudes toward the inner surface 14A of the wheel cover 14. The first and second ribs 42 and 44 are provided for positioning a sound absorbing member 50 to be described in detail later.

[0056] In this embodiment, if Figure 2 and Figure 3As shown, the sound absorbing member 50 is arranged between the pad member 40 and the inner surface 14A of the wheel house 14 and the opening 12A side of the front side member 12. As an example, the sound absorbing member 50 is made of a resin such as polyester or acrylic, a foam material such as rubber, or a porous material such as felt or glass wool. As an example, the sound absorbing member 50 is arranged between the pad member 40 and the inner surface 14A of the wheel house 14 and the opening 12A side of the front side member 12. Figure 2 . In the present embodiment, the sound absorbing member 50 is attached to the cushion member 40 and includes a first sound absorbing member 52 and a second sound absorbing member 54. Specifically, the first sound absorbing member 52 is arranged in a closed cross section formed by one surface 41 of the first cushion member 40A and a portion of the open cross section of the front side member 12, that is, arranged in the upper chamber 130 constituting the closed cross section, and is attached to one surface 41 of the first cushion member 40A.

[0057] The second sound absorbing member 54 is arranged in a semi-closed cross section formed by one surface 41 of the second cushion member 40B and the inner surface 14A of the wheel cover 14, that is, in a space between the one surface 41 and the inner surface 14A constituting the semi-closed cross section, and is attached to the one surface 41 of the second cushion member 40B. Figure 3 As illustrated, the second sound absorbing member 54 is attached between the first rib 42 and the second rib 44 for positioning provided on one surface 41 of the second cushion member 40B. Figure 4 This diagram schematically shows how the tire should be installed. Figure 1 FIG. 1 is a side view of an example of a vehicle front structure 10 in the vicinity of a tire 30 .

[0058] like Figure 3 and Figure 4 As shown, five first ribs 42 are provided on the second cushion member 40B, for example, along the curve of the inner surface 14A of the wheel house 14, that is, along the curve of the outer circumference of the tire 30. Four second ribs 44 are arranged in a row in the vehicle front-to-rear direction on the upper side of the upper wall portion 121 of the front side member 12. In this embodiment, the second sound absorbing member 54 is attached to the area surrounded by the five first ribs and the four second ribs 44. In other words, the second sound absorbing member 54 is attached along the inner surface 14A of the wheel house 14.

[0059] like Figure 4 As shown, in this embodiment, the sound absorbing member 50 is arranged in a position facing the upper portion of the tire 30 in the vehicle. That is, the sound absorbing member 50 is arranged in a position overlapping with the tire 30 in the vehicle height direction. As an example, the first sound absorbing member 52 and the second sound absorbing member 54 are attached to the cushion member 40 using an adhesive. Note that the attachment method is not limited to an adhesive, and known attachment methods can be employed.

[0060] Functions and effects of this embodiment

[0061] Next, the action and effects of this embodiment will be described.

[0062] In the vehicle front structure 10 of the present embodiment, when the cushion member 40 is attached to the front side member 12 between the front side member 12 and the tire 30, the sound absorbing member 50 is arranged in a closed or semi-closed cross-section formed by a portion of the open cross-section of the front side member 12, thereby eliminating the need for another space for placing the sound absorbing member 50. Therefore, the dead space formed when the cushion member 40 is attached to the front side member 12 can be effectively utilized, thereby obtaining a sound absorbing effect for absorbing noise from the tire 30 and the like.

[0063] In the vehicle front structure 10 of the present embodiment, since the sound absorbing member 50 is attached to the cushion member 40, when noise propagates in the order of the tire 30, the cushion member 40, and the open cross section of the front side member 12, resonance and vibration in the closed or semi-closed cross section formed by the cushion member 40 and a portion of the open cross section of the front side member 12 can be reduced more quickly.

[0064] In the vehicle front structure 10 of this embodiment, since the sound absorbing member 50 is arranged at a position overlapping with the tire 30 in a plan view, the sound absorbing member 50 can be arranged in a portion that has a greater impact on the occupants in the vehicle cabin, thereby improving the sound absorption effect on the occupants.

[0065] In the vehicle front structure 10 of this embodiment, since the front side member 12 is provided in the wheel house 14 on an extension line of the side member and is a frame portion extending in the vehicle front-rear direction, the sound absorbing member 50 can be arranged over a wider range facing the tire 30. This can further enhance the sound absorption effect.

[0066] In the vehicle front structure 10 of the present embodiment, since the bulkhead 124 and the extended bulkhead 142 are provided as ribs that define two chambers in the vehicle height direction, the sound absorbing member 50 can be positioned by the bulkhead 124 and the extended bulkhead 142. Furthermore, since the sound absorbing member 50 is arranged in the upper chamber in the vehicle height direction, the sound absorbing member 50 can be placed closer to the side of the occupants in the vehicle cabin, thereby further improving the sound absorption effect on the occupants.

[0067] In the vehicle front structure 10 of the present embodiment, since the cushion member 40 includes the first rib 42 and the second rib 44 on one surface 41 on the side to which the sound absorbing member 50 is attached, the first rib 42 and the second rib 44 can be used to set the attachment position of the sound absorbing member 50 when attaching the sound absorbing member 50, thereby improving the ease of attaching the sound absorbing member 50. In other words, the first rib 42 and the second rib 44 function as positioning ribs.

[0068] Modifications

[0069] In the above embodiment, if Figure 2 As illustrated, the sound absorbing member 50 is entirely attached to the inner surface 14A of the wheel house 14 in the vehicle front-rear direction, but the present invention is not limited thereto. Figure 5 It is a schematic diagram showing Figure 1 FIG. 1 is a bottom view of an example of a vehicle front structure 10 .

[0070] For example, Figure 5 As shown in the shaded area A in the figure, the sound absorbing member 50 may be arranged at least on the side closer to the vehicle cabin in the vehicle front-to-rear direction. In other words, the sound absorbing member 50 may not be arranged throughout the entire closed cross-section of the front side member 12 (in the upper chamber 130), but only on the front side. In other words, the sound absorbing member 50 may not be arranged on the rear side of the closed cross-section of the front side member 12 (in the upper chamber 130).

[0071] If the sound absorbing member 50 is arranged at least on the side closer to the vehicle compartment as described above, the cost required for the sound absorbing member 50 can be reduced and the sound absorbing effect on the occupants can be improved.

[0072] Figure 6 and Figure 7 1 and 2 are side views schematically illustrating the attachment positions of the sound absorbing member 50. The front side member 12 of the above embodiment includes two chambers, namely, an upper chamber 130 and a lower chamber 132, in the vehicle height direction, but the present invention is not limited thereto. Figure 6 and Figure 7 As shown, when the front side member 12 includes three chambers adjacent to each other in the vehicle height direction, the sound absorbing member 50 may be attached to the uppermost chamber and the middle chamber, as shown in FIG. Figure 6 The modification example 1 shown in the figure. In addition, Figure 7 In the illustrated modification 2, the sound absorbing member 50 may be attached only to the uppermost chamber. When the front side member 12 includes three or more chambers adjacent to each other in the vehicle height direction, the sound absorbing member 50 may be attached to an upper chamber including at least the uppermost chamber.

[0073] In Modifications 1 and 2, the front side member 12 includes ribs that define three or more chambers in the vehicle height direction, and the sound absorbing member 50 is arranged in each of the chambers defined by the ribs. Therefore, the sound absorbing member 50 can be positioned by the ribs. Furthermore, since the sound absorbing member 50 is arranged in the upper chamber of the three or more chambers, including at least the uppermost chamber in the vehicle height direction, the sound absorbing member 50 can be positioned closer to the vehicle cabin occupants, further enhancing the sound absorption effect for the occupants.

[0074] In the vehicle front structure 10 of the above-described embodiment, the sound absorbing member 50 is attached to the pad member 40 , but the present invention is not limited thereto. Figure 8 and Figure 92 are front sectional views of main parts, schematically illustrating attachment positions of the sound absorbing members 50 in Modification 3 and Modification 4, respectively.

[0075] In modification 3, if Figure 8 As shown, the first sound absorbing member 52 is attached to the front side member 12. Specifically, the first sound absorbing member 52 is attached to the surface of the inner wall portion 123 of the front side member 12 on the upper chamber 130 side. Therefore, by attaching the first sound absorbing member 52 to the front side member 12, the cushion member 40 can be attached to the front side member 12 after the first sound absorbing member 52 is attached to the front side member 12. This can improve the ease of attaching the first sound absorbing member 52. The second sound absorbing member 54 can also be attached to the front side member 12.

[0076] In modification 4, if Figure 9 As shown, the first sound absorbing member 52 is attached to the cushion member 40 and the front side member 12. Specifically, the first sound absorbing member 52 is attached to the surface of the inner wall portion 123 of the front side member 12 on the upper chamber 130 side, on the vehicle width direction inner side. Simultaneously, the first sound absorbing member 52 is attached to one surface 41 of the cushion member 40 on the vehicle width direction outer side. Therefore, by attaching the first sound absorbing member 52 to both the cushion member 40 and the front side member 12, the sound absorbing member 50 can be more securely attached in a closed or semi-closed cross-section. Note that the second sound absorbing member 54 can be attached to both the cushion member 40 and the front side member 12. The second sound absorbing member 54 can be divided into a third sound absorbing member attached to the cushion member 40 and a fourth sound absorbing member attached to the front side member 12.

[0077] Remark

[0078] Although the vehicle front structure 10 is described as an example of a vehicle structure in the above embodiment, the vehicle structure of the present invention is not limited to the vehicle front structure 10, but may also be a vehicle rear structure. The vehicle rear structure may have a structure similar to the vehicle front structure 10.

[0079] Although the vehicle front structure 10 is integrally formed by die casting in the above-described embodiment, the present invention is not limited thereto, and at least the framework members such as the front side members 12 may be integrally formed.

[0080] In the above embodiment, both the front side member 12 and the fender apron upper member 18 have an open cross-sectional shape with an opening on the outer side in the vehicle width direction, but the present invention is not limited thereto. At least one of the front side member 12 or the fender apron upper member 18 may have an open cross-sectional shape with openings on both the outer side and the inner side in the vehicle width direction.

[0081] In the above embodiment, the second cushion member 40B includes five first ribs 42 and four second ribs 44, but the present invention is not limited thereto. The number and attachment positions of the first ribs 42 and the second ribs 44 can be changed as needed according to the size or other characteristics of the second sound absorbing member 54 attached to the second cushion member 40B.

[0082] In the above embodiment, the second pad member 40B includes five first ribs 42 and four second ribs 44, but the present invention is not limited thereto, and the second pad member 40B may not include the first ribs 42 or the second ribs 44. In particular, when Figure 8 When the sound absorbing member 50 is attached to the front side member 12 as in the illustrated modification 3, the first rib 42 and the second rib 44 are not necessary.

[0083] The configuration of the present invention is not limited to the above-described embodiments, and can be changed as needed as long as the problem can be solved.

Claims

1. A vehicle structure characterized by include: a skeleton member integrally formed by die-casting and having a shape having an open cross-section with an opening in at least one direction; a cushion member configured to be disposed between the frame member and the tire and attached to the frame member to form a closed cross-section or a semi-closed cross-section with the open cross-section portion of at least a portion of the frame member; as well as A sound absorbing member is arranged in the closed cross section or the semi-closed cross section.

2. The vehicle structure according to claim 1, characterized in that The sound absorbing member is attached to the cushion member.

3. The vehicle structure according to claim 1, characterized in that The sound absorbing member is attached to the frame member.

4. The vehicle structure according to claim 1, characterized in that The sound absorbing member is attached to both the cushion member and the frame member.

5. The vehicle structure according to claim 1, characterized in that The sound absorbing member is configured to be arranged at a position overlapping with the tire in a plan view.

6. The vehicle structure according to claim 1, characterized in that The frame member is a frame portion extending in the front-rear direction of the vehicle in the wheel house.

7. The vehicle structure according to claim 6, characterized in that The frame member includes two or more chambers separated by ribs in the vehicle height direction, and The sound absorbing member is arranged in an upper chamber, and the upper chamber includes at least a chamber located uppermost in a height direction of the vehicle among the two or more chambers.

8. The vehicle structure according to claim 7, characterized in that The frame member includes two chambers divided by the rib in the vehicle height direction, and The sound absorbing member is arranged in the chamber located on the upper side in the vehicle height direction.

9. The vehicle structure according to claim 2, characterized in that The cushion member includes ribs on a surface on a side to which the sound absorbing member is attached.

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