Vehicle underbody structure

Abstract

The objective is to provide a vehicle underbody structure that can transmit loads applied from the front of the vehicle body, such as those detected by SORB testing, to the side sills. [Solution] The lower body structure of the vehicle comprises a floor panel, side sills extending in the longitudinal direction of the vehicle body at both ends of the floor panel in the width direction of the vehicle body, a hinge pillar 7 connected to the side sill and extending vertically at the front end of the side sill, and a reinforcement 65 extending in the longitudinal direction of the vehicle body within the side sill and fastened to the hinge pillar 7 via a fastening member 66.

Description

Technical Field

[0001] The present invention relates to a lower body structure of a vehicle.

Background Art

[0002] Patent Document 1 discloses a lower body structure of a vehicle in which side sill reinforcements having closed cross-sections arranged in the vehicle body width direction and extending in the front-rear direction are arranged within side sills extending in the front-rear direction at the lower side of the vehicle body. The side sill reinforcements disclosed in Patent Document 1 mainly aim to promote the absorption of input loads from the side of the vehicle body.

[0003] Loads that can be input to the vehicle body may be input from the front of the vehicle body in a state overlapping a part in the vehicle body width direction, for example, in a side over-lap rigid barrier (SORB) test or the like.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the front end of the side sill reinforcement of Patent Document 1 terminates within the side sill, it is impossible to transmit the load input to the vehicle body from the front of the vehicle body by an SORB test or the like to the side sill, and there is room for improvement.

[0006] An object of the present invention is to provide a lower body structure of a vehicle capable of transmitting a load input from the front of the vehicle body to the side sill by an SORB test or the like.

Means for Solving the Problems

[0007] One aspect of the present invention is Floor panel and Side sills extending in the longitudinal direction of the vehicle body at both ends of the floor panel in the width direction of the vehicle body, A hinge pillar connected to the side sill and extending vertically at the front end of the side sill, The system includes a reinforcement that extends in the longitudinal direction of the vehicle body within the side sill and is fastened to the hinge pillar via a fastening member, The lower body structure of the vehicle.

[0008] According to the present invention, since a reinforcement is fastened to the hinge pillar, impact loads applied to the hinge pillar, such as those from an SORB test, can be transmitted to the side sill via the reinforcement and fastening members. As a result, the impact load applied to the hinge pillar can be distributed to the reinforcement, fastening members, and side sill, and deformation inside the vehicle interior that may occur due to the retraction of the hinge pillar can be suppressed. [Effects of the Invention]

[0009] According to the vehicle lower body structure of the present invention, loads input from the front of the vehicle body, such as in SORB tests, can be transmitted to the side sills. [Brief explanation of the drawing]

[0010] [Figure 1] A plan view showing the lower body structure of a vehicle according to an embodiment of the present invention. [Figure 2] A perspective view of the vehicle, seen from the rear of the interior. [Figure 3] A side view of the vehicle with the body side panels and hinge pillar outers hidden. [Figure 4] A side view of the vehicle with the body side panel displayed. [Figure 5] Enlarged perspective view of the reinforcing member and its surroundings. [Figure 6] A partially enlarged cross-sectional view along the line VI-VI in Figure 3. [Figure 7] Figure 2 shows a partially enlarged perspective view of the second reinforcing member and its surrounding area. [Figure 8] A partially enlarged perspective view showing the state with the third reinforcing member added. [Figure 9] Figure 8 shows a partially enlarged cross-sectional view along the line IX-IX. [Figure 10] Figure 3 shows a partially enlarged cross-sectional view along the XX battle line. [Modes for carrying out the invention]

[0011] The details of the vehicle's understructure according to the present invention will be described below for each embodiment with reference to the attached drawings. In the following description, terms indicating directions such as "front," "rear," "right," "left," "up," and "down" refer to the directions of the vehicle body when the vehicle is traveling forward, with "front" being the direction of travel during forward movement, unless otherwise specified.

[0012] Figure 1 is a plan view of the automobile 1 having the lower (side) structure of the vehicle according to this embodiment, with the outside panel and hinge pillar outer hidden. As shown in Figure 1, the automobile 1 comprises a dash panel 2, a pair of left and right front side frames 3, a floor panel 4, a toe board 5, a pair of left and right side sills 6, and a pair of left and right hinge pillars 7.

[0013] The dash panel 2 extends in the width direction of the vehicle body and is a panel member that separates the passenger compartment C from the drive source compartment E, where the motor and other drive sources are located, in the front-rear direction of the vehicle body. The pair of left and right front side frames 3 extend in the front-rear direction of the vehicle body on both sides in the width direction of the front of the vehicle body. The pair of left and right front side frames 3 extend forward from the dash panel 2. The drive source compartment E is provided between the pair of left and right front side frames 3.

[0014] As shown in Fig. 2, the floor panel 4 is a member that constitutes the floor surface of the passenger compartment space. The turbo board 5 is disposed across the dash panel 2 and the floor panel 4. The turbo board 5 is arranged to be inclined upward in the vehicle body direction toward the front side of the vehicle body. The rear end portion of the turbo board 5 is joined to the front end of the floor panel 4, for example, by welding, and the front end portion of the turbo board 5 is joined to the lower end portion of the dash panel 2, for example, by welding.

[0015] The turbo board 5 includes a main body portion � that extends in the vehicle body width direction and constitutes the floor surface at the feet of the occupant, and flange portions 52 that extend upward from both ends in the vehicle body width direction of the main body portion 51. The flange portions 52 are joined to the pair of left and right hinge pillars 7, for example, by welding. In other words, the turbo board 5 is provided on the indoor side at the lower end of the hinge pillar 7.

[0016] The hinge pillar 7 is disposed on both sides in the vehicle body width direction of the dash panel 2 and extends in the vertical direction to support the dash panel 2. The hinge pillar 7 is connected to the front end of the side sill 6.

[0017] As shown in Fig. 3, the hinge pillar 7 includes a hinge pillar outer 71 (Fig. 4) having a hat-shaped cross section that is located on the outer side in the vehicle body width direction and is open to the inner side in the vehicle body width direction, and a hinge pillar inner 72 having a hat-shaped cross section that is located on the inner side in the vehicle body width direction and is open to the outer side in the vehicle body width direction.

[0018] The hinge pillar inner 72 includes a side surface portion 72a that constitutes the inner surface in the vehicle body width direction of the hinge pillar 7, a front surface portion 72b that constitutes the front surface in the vehicle body direction of the hinge pillar 7, a rear surface portion 72c that constitutes the rear surface in the vehicle body direction of the hinge pillar 7, a first flange portion 72d provided at the outer edge in the vehicle body width direction of the front surface portion 72b, and a second flange portion 72e provided at the outer edge in the vehicle body width direction of the rear surface portion 72c.

[0019] The hinge pillar inner 72 comprises a main body portion 72A extending in the vertical direction of the vehicle body, a curved portion 72B extending downward and rearward from the lower end of the main body portion 72A, and a rear extension portion 72C extending towards the rear of the vehicle body from the rear end of the curved portion 72B. The curved portion 72B and the rear extension portion 72C constitute the connection between the lower end of the hinge pillar 7 and the front end of the side sill 6. The rear end of the rear extension portion 72C is joined to the front end of the side sill inner 61, which will be described later.

[0020] The main body portion 72A, the curved portion 72B, and the rear extension portion 72C of the hinge pillar inner 72 are integrally connected. The side portion 72a, front portion 72b, rear portion 72c, first flange portion 72d, and second flange portion 72e that constitute the hinge pillar inner 72 are formed continuously not only in the main body portion 72A, but also in the curved portion 72B and the rear extension portion 72C. In the curved portion 72B and the rear extension portion 72C, the front portion 72b constitutes the lower portion, and the rear portion 72c constitutes the upper portion.

[0021] Figure 4 shows the automobile 1 with the outside panel and hinge pillar outer 71 displayed. As shown in Figure 4, the hinge pillar outer 71 comprises a side portion 71a that forms the outer surface of the hinge pillar 7 in the vehicle width direction, a front portion 71b that forms the front surface of the hinge pillar 7, a rear portion 71c that forms the rear surface of the hinge pillar 7, a first flange portion 71d provided on the inner edge of the front portion 71b in the vehicle width direction, and a second flange portion 71e provided on the inner edge of the rear portion 71c in the vehicle width direction.

[0022] The hinge pillar outer 71 is positioned opposite the hinge pillar inner 72 on the outside in the vehicle width direction, and the hinge pillar outer 71 and the hinge pillar inner 72 are joined to each other by the joining of the first flange portions 71d and 72d and the joining of the second flange portions 71e and 72e. As a result, a closed cross section S1 that is continuous in the vertical direction of the vehicle body is formed between the hinge pillar outer 71 and the hinge pillar inner 72 (Figure 3).

[0023] As shown in Figure 3, a reinforcing member 81 is provided in the internal space of the hinge pillar 7, which is enclosed by the hinge pillar outer 71 and the hinge pillar inner 72. The reinforcing member 81 is positioned in the curved portion 72B below the center in the height direction of the hinge pillar 7. At least a portion of the reinforcing member 81 overlaps with the vertical position of the front side frame 3.

[0024] As shown in Figures 5 and 6, the reinforcing member 81 comprises a side portion 81a positioned along the side portion 71a of the hinge pillar outer 71, an upper portion 81b extending inward in the vehicle width direction from the upper edge of the side portion 81a, a lower portion 81c extending inward in the vehicle width direction from the lower edge of the side portion 81a, an upper flange portion 81d extending upward from the inner end of the upper portion 81b, and a lower flange portion 81e extending downward from the inner end of the lower portion 81c, and overall has a hat-shaped cross-section that opens inward in the width direction when viewed from the front-rear direction of the vehicle. The upper flange portion 81d and the lower flange portion 81e are joined to the side portion 72a of the hinge pillar inner 72, for example, by welding.

[0025] As shown in Figure 5, the front end of the side portion 81a of the reinforcing member 81 is provided with a tongue-shaped portion 81f that extends forward. The tongue-shaped portion 81f is joined to the first flange portion 72d of the hinge pillar inner 72 by, for example, welding. The rear end of the upper surface portion 81b of the reinforcing member 81 is provided with an upper tongue-shaped portion 81g that extends upward. The rear end of the lower surface portion 81c is provided with a lower tongue-shaped portion 81h that extends backward. The upper tongue-shaped portion 81g and the lower tongue-shaped portion 81h are joined to the upper surface portion 72c of the curved portion 72B of the hinge pillar inner 72 by, for example, welding. In other words, the rear end of the reinforcing member 81 is fixed to the curved portion 72B.

[0026] As a result, as shown in Figure 6, a closed cross section S2 is formed between the hinge pillar inner 72 and the reinforcing member 81, which is continuous in the longitudinal direction of the vehicle body. In other words, the reinforcing member 81 works in cooperation with the hinge pillar inner 72 to form a closed cross section S2 that extends in the longitudinal direction of the vehicle body on the exterior side of the lower part of the hinge pillar inner 72.

[0027] As shown in Figure 7, a second reinforcing member 82 is provided on the interior side of the hinge pillar 7 and the dash panel 2 (inside the hinge pillar 7 in the vehicle width direction). The second reinforcing member 82 is arranged in a diagonal brace manner, straddling the dash panel 2 and the hinge pillar inner 72. At least a portion of the second reinforcing member 82 overlaps in vertical position with that of the reinforcing member 81 (Figure 6).

[0028] The second reinforcing member 82 has a front portion 82a facing the rear side of the dash panel 2, a side portion 82b facing the inward side in the width direction of the hinge pillar inner 72, and a connecting portion 82c that integrally connects the front portion 82a and the side portion 82b.

[0029] The front portion 82a of the second reinforcing member 82 is provided spanning the vicinity of the front end of the toe board 5 and the dash panel 2, and is joined to the dash panel 2 and the toe board 5 by, for example, welding. The side portion 82b of the second reinforcing member 82 has a larger dimension in the vertical direction of the vehicle body than the front portion 82a. The side portion 83b is joined to the hinge pillar inner 72 by, for example, welding.

[0030] The connecting portion 82c extends inclined to connect the side portion 83b and the front portion 82a. The connecting portion 82c is inclined outward in the width direction of the vehicle body toward the rear of the vehicle body from the front portion 82a. The connecting portion 82c has two hat-shaped cross-sectional portions that open toward the outside of the passenger compartment. The two hat-shaped cross-sectional portions have a first hat portion 83 located on the lower side and a second hat portion 84 located above the first hat portion 83.

[0031] More specifically, as shown in Figure 6, the first hat portion 83, in the portion facing the hinge pillar inner 72, has a side portion 83a that is spaced apart and faces the hinge pillar inner 72 on the inside in the vehicle width direction, an upper portion 83b extending outward in the vehicle width direction from the upper edge of the side portion 83a, a lower portion 83c extending outward in the vehicle width direction from the lower edge of the side portion 83a, an upward extension portion 83d extending upward from the outer end of the upper portion 83b, and a downward extension portion 83e extending downward from the outer end of the lower portion 83c.

[0032] The second hat portion 84 has, in the portion facing the hinge pillar inner 72, a side portion 84a that is spaced apart and faces the hinge pillar inner 72 in the vehicle width direction, an upper portion 84b extending outward in the vehicle width direction from the upper edge of the side portion 84a, a lower portion 84c extending outward in the vehicle width direction from the lower edge of the side portion 84a, an upward extension portion 84d extending upward from the outer end of the upper portion 84b, and a downward extension portion 84e extending downward from the outer end of the lower portion 84c. In this embodiment, the downward extension portion 84e of the second hat portion 84 is composed of the upward extension portion 83d of the first hat portion 83.

[0033] The connecting portion 82c is joined to the hinge pillar inner 72 by welding or the like at the upper extensions 83d, 84d and lower extensions 83e, 84e of the first hat portion 83 and the second hat portion 84. As a result, a second closed section S3 and a third closed section S4 are formed between the first hat portion 83 and the second hat portion 84 and the hinge pillar inner 72. In other words, the second reinforcing member 82 works in cooperation with the hinge pillar inner 72 to form a second closed section S3 and a third closed section S4 that extend in the longitudinal direction of the vehicle body. The second closed section S3 overlaps in the vertical position with the closed section S2 of the reinforcing member 81. The third closed section S4 is located above the second closed section S3.

[0034] The first hat portion 83 and the second hat portion 84 are integrally connected from the portion facing the hinge pillar inner 72 to the portion facing the dash panel 2. The first hat portion 83 and the second hat portion 84 that constitute the portion facing the hinge pillar inner 72 are also formed continuously in the portion facing the dash panel 2.

[0035] As shown in Figure 8, a third reinforcing member 85 is further provided on the inner side of the hinge pillar 7 in the vehicle width direction. The third reinforcing member 85 is arranged to straddle the second reinforcing member 82 and the hinge pillar inner 72.

[0036] The third reinforcing member 85 has a third hat portion 86 and a fourth hat portion 87 that correspond to the first hat portion 83 and the second hat portion 84 of the second reinforcing member 82, respectively. The third hat portion 86 is superimposed on the first hat portion 83 from the inside in the vehicle width direction, and the fourth hat portion 87 is superimposed on the second hat portion 84 from the inside in the vehicle width direction.

[0037] More specifically, as shown in Figure 9, the third hat portion 86 has a side portion 86a that is spaced apart and facing the inner side of the hinge pillar inner 72 in the vehicle width direction, an upper portion 86b that extends outward in the vehicle width direction from the upper edge of the side portion 86a, a lower portion 86c that extends outward in the vehicle width direction from the lower edge of the side portion 86a, an upward extension portion 86d that extends upward from the outer end of the upper portion 86b, and a downward extension portion 86e that extends downward from the outer end of the lower portion 86c.

[0038] The fourth hat portion 87 has a side portion 87a that is spaced apart and facing the inside of the hinge pillar inner 72 in the vehicle width direction, an upper portion 87b that extends outward in the vehicle width direction from the upper edge of the side portion 87a, a lower portion 87c that extends outward in the vehicle width direction from the lower edge of the side portion 87a, an upward extension portion 87d that extends upward from the outer end of the upper portion 87b, and a downward extension portion 87e that extends downward from the outer end of the lower portion 87c. In this embodiment, the downward extension portion 87e of the fourth hat portion 87 is composed of the upward extension portion 86d of the third hat portion 86.

[0039] As shown in Figure 8, the third reinforcing member 85 is fastened to the hinge pillar inner 72 with bolts or the like at the rear flange portion 85a extending rearward from the rear end portion, the lower flange portion 85b extending downward from the lower extension portion 86e of the third hat portion 86, and the upper flange portion 85c extending upward from the upper extension portion 87d of the fourth hat portion 87. At the rear ends of the side portions 86a and 87a of the third hat portion 86 and the fourth hat portion 87, it is fastened to the side portions 83a and 84a of the first hat portion 83 and the second hat portion 84, respectively, with bolts or the like.

[0040] As a result, as shown in Figure 9, a fourth closed section S5 and a fifth closed section S6 are formed between the third hat portion 86 and the fourth hat portion 87 and the hinge pillar inner 72. In other words, the third reinforcing member 85 works in cooperation with the hinge pillar inner 72 to form a fourth closed section S5 and a fifth closed section S6 that extend in the longitudinal direction of the vehicle body. The fourth closed section S5 overlaps in the vertical position with the closed section S2 of the reinforcing member 81. The fifth closed section S6 is located above the second and fourth closed sections S3 and S5.

[0041] The second reinforcing member 82 and the third reinforcing member 85 form closed sections S3, S4, S5, and S6 on the hinge pillar inner 72 that extend in the front-rear direction over almost the entire area of ​​the hinge pillar inner 72 in the front-rear direction.

[0042] As shown in Figure 2, the side sill 6 is provided so as to extend in the longitudinal direction of the vehicle body along the vehicle body widthwise end of the floor panel 4. The side sill 6 is formed, for example, by welding together a plurality of plate members. In this embodiment, the side sill 6 has a side sill inner 61 located on the inside in the vehicle body widthwise direction and a side sill outer 62 located on the outside in the vehicle body widthwise direction. The side sill 6 has a closed cross section extending in the longitudinal direction, formed by the side sill inner 61 and the side sill outer 62 (Figure 10).

[0043] More specifically, as shown in Figure 3, the side sill inner 61 has an inner upper wall portion 61a extending in the vehicle width direction, an inner lower wall portion 61b facing the inner upper wall portion 61a and extending in the vehicle width direction, an inner wall portion 61c connecting the inner ends of the inner upper wall portion 61a and the inner lower wall portion 61b, and upper and lower flanges 61d and 61e extending vertically from the outer ends of the inner upper wall portion 61a and the inner lower wall portion 61b, respectively. The side sill inner 61 has a hat shape in which the cross section perpendicular to the extending direction bulges inward in the vehicle width direction.

[0044] As shown in Figure 4, the side sill outer 62 has an outer upper wall portion 62a extending in the vehicle width direction, an outer lower wall portion 62b facing the outer upper wall portion 62a and extending in the vehicle width direction, an outer wall portion 62c connecting the outer ends of the outer upper wall portion 62a and the outer lower wall portion 62b, and upper and lower flanges 62e and 62f extending vertically from the inner ends of the outer upper wall portion 62a and the outer lower wall portion 62b, respectively. The side sill outer 62 has a hat shape in which the cross section perpendicular to the extending direction bulges outward in the vehicle width direction.

[0045] The side sill 6 is formed by joining the upper flanges 61e and 62e of the side sill inner 61 and the side sill outer 62 to each other, and the lower flanges 61f and 62f to each other, in the vehicle width direction, for example by welding, thereby forming a closed cross-section S7 with a substantially rectangular cross-section.

[0046] Referring to Figure 3, a reinforcement 65 is positioned within the side sill 6. The reinforcement 65 is made of an extruded material such as aluminum. The reinforcement 65 extends along the side sill 6 in the longitudinal direction of the vehicle body. The reinforcement 65 extends from the rear end of the side sill 6 (Figure 2) to near the front end of the hinge pillar 7. More specifically, the reinforcement 65 extends forward of the center of the hinge pillar 7 in the longitudinal direction of the vehicle body. The front end of the reinforcement 6 is adjacent to the front portion 72b of the hinge pillar inner 72. The reinforcement 65 is fixed to the side sill inner 61 at multiple locations in the longitudinal direction by fastening members 66 such as bolts.

[0047] The front end portion 65g of the reinforcement 65 is inclined rearward from the inside in the vehicle width direction toward the outside in the vehicle width direction when viewed from above (shown by a dashed line in Figure 1). The reinforcement 65 comprises a plurality of adjacent closed sections S11, S12, S13 in the vehicle width direction.

[0048] More specifically, as shown in Figure 10, the reinforcement 65 has an upper wall 65a and a lower wall 65b that are opposite each other in the vertical direction and extend horizontally, an inner wall 65c and an outer wall 65d that are opposite each other in the vehicle width direction and extend vertically, and a first vertical wall 65e and a second vertical wall 65f that extend vertically between the inner wall 65c and the outer wall 65d. The multiple closed sections S11, S12, and S13 have an inner closed section S11 located on the inside in the vehicle width direction, an outer closed section S12 located on the outside in the vehicle width direction, and an intermediate closed section S13 located between the inner closed section S11 and the outer closed section S12.

[0049] As shown in Figures 7 and 10, the reinforcement 65 is fastened to the hinge pillar 7 at its front end via a fastening member 66. The fastening member 66 connects the toe board 5, the hinge pillar 7, and the reinforcement 65.

[0050] More specifically, as shown in Figure 10, a blind nut 67 is fixed to the inner wall 65c of the reinforcement 65, protruding toward the inner closed section S11. Fastening holes are provided in the flange portion 52 of the toe board 5 and the hinge pillar inner 72 at positions corresponding to the blind nut 67. The reinforcement 65 is fixed inside the hinge pillar 7 by inserting the fastening member 66 from the inside of the vehicle interior C (the flange portion 52 side of the toe board 5) into the fastening hole and screwing it onto the blind nut 67.

[0051] In other words, the fastening member 66 is inserted through the closed cross section (inner closed cross section) S11 at the inner end in the width direction of the vehicle body. The flange portion 52, the hinge pillar inner 72, and the reinforcement 65 are fastened together by the fastening member 66 (all three are fastened together). In this specification, the blind nut 67 is a type of fixing nut that is secured by drilling a pilot hole and crimping it with a special tool in places where tapping is difficult or welding is not possible, such as aluminum panels and thin sheet metal. Figure 10 describes a configuration in which the front end of the reinforcement 65 is fixed to the hinge pillar inner 72, but even in parts of the reinforcement 65 other than the front end that are fixed to the side sill inner 61, the reinforcement 65 is also fixed inside the side sill inner 61 by blind nuts and fastening members.

[0052] The lower body structure of the vehicle according to the above embodiment provides the following effects.

[0053] The lower body structure of vehicle 1 comprises a floor panel 4, side sills 6 extending in the longitudinal direction of the vehicle body at both ends of the floor panel 4 in the width direction of the vehicle body, hinge pillars 7 connected to the side sills 6 and extending vertically at the front end of the side sills 6, and reinforcement 65 extending in the longitudinal direction of the vehicle body within the side sills 6 and fastened to the hinge pillars 7 via fastening members 66.

[0054] With this configuration, since the reinforcement 65 is fastened to the hinge pillar 7, impact loads applied to the hinge pillar 7, for example, by SORB testing, can be transmitted to the side sill 6 via the reinforcement 65 and fastening member 66. As a result, the impact load applied to the hinge pillar 7 can be distributed to the reinforcement 65, fastening member 66, and side sill 6, and deformation inside the vehicle interior that may occur due to the retraction of the hinge pillar 7 can be suppressed.

[0055] The floor panel 4 is connected to the front end and further includes a toe board 5 provided in the passenger compartment C at the lower end of the hinge pillar 7. The fastening member 66 fastens the toe board 5, the hinge pillar 7, and the reinforcement 65 together.

[0056] In this configuration, the toe board 5, the hinge pillar 7, and the reinforcement 65 are fastened together by the fastening member 66. As a result, the toe board 5 can also receive the impact load applied to the hinge pillar 7, and the toe board 5 also suppresses the retraction of the hinge pillar 7.

[0057] The reinforcement 65 comprises multiple adjacent closed sections S11, S12, and S13 in the vehicle width direction.

[0058] This configuration allows for increased rigidity of the reinforcement 65 compared to the case where the reinforcement 65 has a single closed cross-section.

[0059] The fastening member 66 is inserted through the inner closed section S11 at the inner end in the vehicle width direction of the multiple closed sections S11, S12, and S13.

[0060] With this configuration, the fastening member 66 is inserted through the inner closed cross section S11 on the inside in the width direction of the vehicle body, making it easy to connect to the hinge pillar 7 and the toe board 5.

[0061] Reinforcement 65 extends to near the front end of hinge pillar 7.

[0062] With this configuration, the impact load applied to the hinge pillar 7 from the front of the vehicle body can be transmitted more effectively to the reinforcement 65.

[0063] The toe board 5 comprises a main body portion 51 extending in the vehicle width direction and flange portions 52 extending upward from both ends of the main body portion 51 in the vehicle width direction. The toe board 5 is connected to the hinge pillar 7 at the flange portions 52.

[0064] This configuration provides a specific structure for connecting the toe board 5 to the hinge pillar 7.

[0065] The hinge pillar 7 comprises a hinge pillar inner 72 located on the inside in the vehicle width direction and a hinge pillar outer 71 located on the outside in the vehicle width direction, and the fastening member 66 fastens the flange portion 52, the hinge pillar inner 72, and the reinforcement 65.

[0066] With this configuration, the impact load applied to the hinge pillar 7 from the front of the vehicle body can be more effectively received by the reinforcement 65.

[0067] The front end portion 65e of the reinforcement 65 is inclined rearward in a plan view, from the inside in the vehicle width direction to the outside in the vehicle width direction.

[0068] According to this configuration, for example, when a tire retracting due to an SORB test or the like comes into contact with the front end 65e of the reinforcement 65, it is guided outward in the width direction of the vehicle body, thereby suppressing deformation of the passenger compartment C that may occur due to the retraction of the tire.

[0069] In this embodiment, the reinforcement 65 has been described as an aluminum extruded material, but it is not limited to this, and may be, for example, a pressed iron product, a roll-formed iron product, etc.

[0070] In this embodiment, a configuration has been described in which the reinforcement 65 is fixed to the hinge pillar inner 72 and / or side sill inner 61 by fastening member 66 and blind nut 67. However, the embodiment is not limited to this configuration, and for example, the fastening member 66 may be fastened to a weld nut or the like provided on the reinforcement 65.

[0071] In this embodiment, a configuration in which the reinforcement 65 has multiple closed sections S11, S12, 13 has been described, but the embodiment is not limited to this, and the reinforcement 65 may have only one closed section.

[0072] In this embodiment, a configuration has been described in which the front end portion 65e of the reinforcement 65 is inclined outward in the width direction toward the rear of the vehicle body. However, the configuration is not limited to this, and the front end portion of the reinforcement 65 may be parallel to the width direction of the vehicle body.

[0073] In this embodiment, a configuration in which the reinforcement 65 extends to the vicinity of the front end of the hinge pillar inner 72 has been described, but the configuration is not limited to this, and the reinforcement 65 only needs to be fastened to the hinge pillar inner 72.

[0074] In this embodiment, a configuration in which the toe board 5, hinge pillar inner 72, and reinforcement 65 are fastened together in three ways has been described, but the invention is not limited to this configuration, and the toe board 5 and hinge pillar inner 72, and the hinge pillar inner 72 and reinforcement 65 may be fastened together separately.

[0075] It should be noted that the present invention is not limited to the configuration described in the above embodiments, and various modifications are possible.

[0076] [Note] This disclosure includes the following aspects.

[0077] [Aspect 1] Floor panel and Side sills extending in the longitudinal direction of the vehicle body at both ends of the floor panel in the width direction of the vehicle body, A hinge pillar connected to the side sill and extending vertically at the front end of the side sill, The system includes a reinforcement that extends in the longitudinal direction of the vehicle body within the side sill and is fastened to the hinge pillar via a fastening member, The lower body structure of the vehicle.

[0078] [Aspect 2] The vehicle further includes a toe board provided in the passenger compartment at the lower end of the aforementioned hinge pillar, The fastening member fastens the toe board, the hinge pillar, and the reinforcement. The lower body structure of the vehicle described in Embodiment 1.

[0079] [Aspect 3] The aforementioned reinforcement comprises a plurality of adjacent closed sections in the width direction of the vehicle body. The undercarriage of the vehicle according to embodiment 1 or 2.

[0080] [Aspect 4] The fastening member is inserted through the inner closed section located at the inner end in the vehicle width direction of the plurality of closed sections. The understructure of the vehicle described in Embodiment 3.

[0081] [Aspect 5] The reinforcement extends to the vicinity of the front end of the hinge pillar. The undercarriage of a vehicle as described in any one of embodiments 1 to 4.

[0082] [Aspect 6] The toe board comprises a main body portion extending in the vehicle width direction and flange portions extending upward from both ends of the main body portion in the vehicle width direction. The toe board is connected to the hinge pillar at the flange portion. The undercarriage of a vehicle as described in any one of embodiments 1 to 5.

[0083] [Aspect 7] The aforementioned hinge pillar comprises a hinge pillar inner located on the inside in the vehicle width direction and a hinge pillar outer located on the outside in the vehicle width direction. The fastening member fastens the flange portion, the hinge pillar inner, and the reinforcement. The undercarriage of a vehicle as described in any one of embodiments 1 to 6.

[0084] [Aspect 8] The front end of the reinforcement is inclined rearward in a plan view, from the inside in the vehicle width direction to the outside in the vehicle width direction. The undercarriage of a vehicle as described in any one of embodiments 1 to 7. [Explanation of Symbols]

[0085] 1. Automobile (vehicle) 4 Floor Panels 5 Toeboard 6 Side sill 7 Hinge Pillar 7 51 Main body 52 Flange section 65 Reinforcement 65e front end 66 Fastening members 71 Hinge Pillar Outer 72 Hinge Pillar Inner C Cabin S11 Closed section (inner closed section) S12 Closed section S13 Closed section

Claims

1. Floor panel and Side sills extending in the longitudinal direction of the vehicle body at both ends of the floor panel in the width direction of the vehicle body, A hinge pillar connected to the side sill and extending vertically at the front end of the side sill, The system includes a reinforcement that extends in the longitudinal direction of the vehicle body within the side sill and is fastened to the hinge pillar via a fastening member, The lower body structure of the vehicle.

2. The floor panel is connected to the front end and further comprises a toe board provided in the passenger compartment at the lower end of the hinge pillar. The fastening member fastens the toe board, the hinge pillar, and the reinforcement. The lower body structure of the vehicle according to claim 1.

3. The aforementioned reinforcement comprises a plurality of adjacent closed sections in the width direction of the vehicle body. The lower body structure of a vehicle according to claim 1 or 2.

4. The fastening member is inserted through the inner closed section located at the inner end in the vehicle width direction of the plurality of closed sections. The lower body structure of the vehicle according to claim 3.

5. The reinforcement extends to the vicinity of the front end of the hinge pillar. The lower body structure of a vehicle according to claim 1 or 2.

6. The toe board comprises a main body portion extending in the vehicle width direction and flange portions extending upward from both ends of the main body portion in the vehicle width direction. The toe board is connected to the hinge pillar at the flange portion. The lower body structure of the vehicle according to claim 2.

7. The aforementioned hinge pillar comprises a hinge pillar inner located on the inside in the vehicle width direction and a hinge pillar outer located on the outside in the vehicle width direction. The fastening member fastens the flange portion, the hinge pillar inner, and the reinforcement. The lower body structure of a vehicle according to claim 6.

8. The front end of the reinforcement is inclined rearward in a plan view, from the inside in the vehicle width direction to the outside in the vehicle width direction. The lower body structure of a vehicle according to claim 1 or 2.

Images