JP2011046301A - Vehicle body side structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body side structure which compatibly satisfies lightweight of side sills and ensuring strength of the side sills against collision, and which suppresses the amount of protrusion of a center pillar into a vehicle interior. <P>SOLUTION: The vehicle body side structure 11 includes a left side sill 66 continuous with an end 115 of a floor panel 45; a right side sill substantially symmetrical to the left side sill 66; and a center pillar 81. The vehicle body side structure has, in the vicinity of the center pillar 81, a gusset 151, one end of which is connected to a cross member (floor front cross member 48) connecting the right and left side sills 66, and the other end is connected to a longitudinal side section (inner longitudinal side section 94) of the side sills 66. The gusset has smaller strength than the strength of the side sills 66 and the strength of the cross member (floor front cross member 48) against a side collision load. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicle body side structure having a side sill continuous with a floor of a passenger compartment.

  The vehicle body side structure includes a side sill reinforcing structure in which a reinforcing member is provided in a tubular side sill continuous to the left and right ends of the floor of the passenger compartment. The side sill reinforcement structure extends the reinforcing member (sill reinforcement) from the front end of the side sill into a groove shape, and gradually reduces the depth and width of the groove from the center of the sill reinforcement to prevent stress concentration during a frontal collision. The local deformation of the side sill is prevented (see, for example, Patent Document 1).

However, the conventional technique (Patent Document 1) has a problem that the weight of the side sill increases because the grooved sill reinforcement is placed in the side sill in order to reinforce the side sill.
In addition, the center of the side sill without sill reinforcement is not reinforced, and if a load is applied due to a side collision, the center pillar standing in the center of the side sill may enter the passenger compartment and increase the amount of side sill penetration. .

Japanese Patent No. 3159231

  It is an object of the present invention to provide a vehicle body side structure in which the weight of the side sill and the strength of the side sill against collision are ensured, and the amount of the center pillar entering the vehicle interior is suppressed.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a left side sill that is connected to an end of a floor panel of a passenger compartment, extends under the left side wall of the passenger compartment, and extends from the front to the rear of the passenger compartment. In the vehicle body side structure with a right side sill that is almost symmetrical to the side sill and a center pillar that stands upright in the center of the left and right side sill, the left and right side sills are joined in the vicinity of the center pillar. One end is coupled to the cross member, the other end is coupled to the vertical side portion of the side sill, and a gusset having a strength lower than the strength of the side sill and the strength of the cross member with respect to a side impact load is provided.

  The invention according to claim 2 is characterized in that the side sill reinforcing frame is provided along the vertical side portion of the side sill with the upper surface portion facing the center of the passenger compartment.

  The invention according to claim 3 is characterized in that the lower end of the center pillar stiffener included in the center pillar is integrated with the end of the floor panel.

  In the invention according to claim 1, the left side sill continuous with the end of the floor panel, the right side sill, and the center pillar are provided, and one end is connected to the cross member that joins the left and right side sills in the vicinity of the center pillar. The other end is connected to the vertical side of the side sill, and the side sill strength against the side impact load and the strength of the cross member are less than the strength of the cross member. Then, the gusset is crushed preferentially to absorb the load, the bending deformation of the cross member is suppressed, and the amount of intrusion of the center pillar into the vehicle interior can be suppressed.

  In the invention according to claim 2, since the side sill reinforcement frame is provided along the vertical side part of the side sill with the upper surface part facing the center of the passenger compartment, it intersects above the upper surface part of the side sill reinforcement frame. Both ends of the cross member are inclined along the upper surface portion and are reinforced by the upper surface portion, and the bending of the end of the cross member due to the twisting of the side sill can be suppressed.

  In the invention according to claim 3, since the lower end of the center pillar stiffener included in the center pillar is integrated with the end of the floor panel, when the side impact load at the time of a side collision is input to the center pillar, the side impact load is reduced. The lower end of the center pillar stiffener can be transmitted and dispersed to the end of the floor panel, and the amount of bending of the center pillar toward the vehicle interior can be suppressed.

1 is a perspective view of a vehicle body that employs a vehicle body side structure according to an embodiment of the present invention. It is a top view and operation | movement figure of the underbody of the vehicle body which employ | adopted the vehicle body side part structure which concerns on an Example. It is a side view and action figure of the underbody of the vehicle body which employ | adopted the vehicle body side part structure which concerns on an Example. FIG. 4 is a sectional view taken along line 4-4 in FIG. FIG. 5 is a sectional view taken along line 5-5 in FIG. FIG. 6 is a sectional view taken along line 6-6 in FIG. It is an exploded view of the vehicle body side part structure concerning the Example of this invention. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. It is a figure explaining the mechanism which balances the strength ensuring and weight reduction at the time of the side collision of the vehicle body side part structure which concerns on an Example.

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

  As shown in FIG. 1, the vehicle body side part structure 11 according to the embodiment is adopted in a lower portion 14 of a vehicle body 13 of a vehicle 12 to increase the strength when the vehicle collides and to reduce the weight. This will be specifically described below.

  The vehicle 12 is a four-door sedan, as shown in FIGS. 1 to 3, provided with a front door (not shown) at the front entrance 17 and a rear door not shown at the rear entrance 18. An engine 22 is disposed in the front engine room 21. Reference numeral 24 denotes a front wheel supported by the vehicle body 13.

  The vehicle body 13 includes an underbody 27 that forms the floor of the passenger compartment 26, a front body 28 in front of the passenger compartment 26, a left side body 31 in the passenger compartment 26, a right side body 32, a rear body 33 after the passenger compartment 26, and a roof 34. I have. The left and right sides are substantially symmetrical with respect to the central axis C at the center of the vehicle 12.

The front body 28 includes an engine room 21, and includes a left front side frame 36 that forms a lower portion of the engine room 21, a right front side frame 37, and left and right upper members 38. Front side frames 36 and 37 extend from the front surface 41 of the vehicle 12 to the underbody 27.
As shown in FIG. 3, a sub-body 43 (see also FIG. 10) on which the engine 22 and the like are mounted is attached to the front body 28 from below the front body 28.

  The underbody 27 includes a floor panel 45 attached to the left side body 31 and the right side body 32, a tunnel portion 46 formed in the center, the tunnel portion 46, the floor panel 45, the left and right side bodies 31, And a floor center cross member 52 provided substantially parallel to the front floor cross member 48 and spaced apart by a predetermined distance behind the vehicle 12.

  The underbody 27 includes a middle cross member 53 provided behind the floor center cross member 52, a dashboard 54 separating the vehicle compartment 26 and the engine room 21, and a front provided in front of the vehicle 12 from the dashboard 54. A projecting load support member 56.

A front part 58 of the driver's seat and a front part 61 of the passenger's seat are fixed to the front floor cross member 48.
A rear part 62 of the driver's seat and a rear part 63 of the passenger's seat are fixed to the floor center cross member 52.
A rear seat 64 is fixed to the middle cross member 53.

Further, the underbody 27 has a rear frame 73 coupled to a rear end 67 of the left side sill 66 provided on the left side body 31 and a rear end 72 of the right side sill 71 provided on the right side body 32.
As shown in FIGS. 2 and 3, the rear frame 73 has front portions 75 joined to the rear ends 67 and 72 of the side sills 66 and 71, respectively, inclined toward the upper side of the vehicle 12 and directed inward of the vehicle 12. The rear portion 76 extends rearward of the vehicle 12 so as to be connected to the front portion 75.

Since the left side body 31 and the right side body 32 are symmetrical, the left side body 31 will be mainly described.
The side body 31 includes a front pillar 78, a center pillar 81, a rear pillar 82, a side sill 66, and a side outer panel 83 that forms these surfaces. The left end of the dashboard 54 is joined to the front pillar 78.

The center pillar 81 has an upper end joined to the roof side rail 85 of the roof 34 and a lower end 156 (see FIG. 7) joined to the side sill 66.
A middle cross member 53 is coupled to a rear end 67 of the left side sill 66 and a rear end 72 of the right side sill 71.
Here, as shown in FIG. 2, the distance from the center pillar 81 to the front pillar 78 is L1, the distance from the center pillar 81 to the middle cross member 53 is L2, and the distance L2 is shorter than the distance L1.

Next, the side sill 66 will be described in detail.
As shown in FIGS. 1 and 4 to 7, the side sill 66 has a closed cross-sectional shape, and includes a side sill inner 86 and a side sill outer 87 joined to the side sill inner 86. The front part 88, the central part 91 and the rear part 92 are different.

  As shown in FIG. 4, the front portion 88 of the side sill 66 has an L-shaped cross section, and an inner vertical side portion 94 of the side sill inner 86 is formed substantially vertically, and an inner horizontal side portion 96 that extends straightly to the inner vertical side portion 94. Is formed. On the other hand, in the side sill outer 87, the outer vertical side portion 97 is formed substantially perpendicularly so as to face the inner vertical side portion 94, and the outer horizontal side portion 98 is formed so as to extend straight to the outer vertical side portion 97. An outer vertical side portion 101 that extends straight to the horizontal side portion 98 is formed, and a horizontal base portion 102 that extends straight to the outer vertical side portion 101 is formed.

  More specifically, the front portion 88 of the side sill 66 is provided in an inverted L shape by inverting the L-shape, and the inner vertical side portion 94 is disposed on the vehicle compartment 26 side. In other words, the inner vertical side portion 94 is disposed on the vehicle. 12 and the floor panel 45 (including the inclined side portion 117) extending from the vehicle 12 toward the outside of the vehicle 12 (in the direction of the arrow a1), the cross-sectional shape is generally triangular (inclined). A side 117, an inner vertical side 94, an inner horizontal side 96) or a triangle (an inclined side 117, an outer horizontal side 98, an outer vertical side 101).

  As shown in FIG. 5, the central portion 91 of the side sill 66 is formed by smoothly forming the outer inclined side portion 104 continuously with the outer lateral side portion 98 and the outer vertical side portion 101 shown in FIG. It is the part made. That is, the central portion 91 includes an inner vertical side portion 94, an inner horizontal side portion 96, an outer vertical side portion 97, a horizontal bottom side portion 102, and an outer inclined side portion 104.

  As shown in FIG. 6, the rear portion 92 of the side sill 66 forms an extension portion 106 that extends smoothly from the outer inclined side portion 104 shown in FIG. By forming an extension 107 that extends the portion 102 to the outside of the vehicle 12 and continuing to the extension 106, the cross section is a quadrangle. That is, the rear portion 92 includes an inner vertical side portion 94, an inner horizontal side portion 96, an outer vertical side portion 97 (including the extension portion 106), and a horizontal bottom side portion 102 (including the extension portion 107).

  A side sill reinforcement frame 111 shown in FIG. 8 is attached to the side sill 66, but the side sill reinforcement frame 111 is omitted in FIGS.

Next, the floor panel 45 will be described.
As shown in FIGS. 4 and 5, the floor panel 45 joins the end 115 of the floor bottom 121 facing downward to the horizontal bottom 102 of the side sill 66, and connects the inclined side 117 to the end 115 of the side sill 66. The outer vertical side portion 97 extends obliquely upward, and the end 122 of the inclined side portion 117 is joined to the outer vertical side portion 97 via the side outer panel 83.

  The inclined side portion 117 is joined to the side outer panel 83 overlapped with the outer vertical side portion 97 with the end 122 overlapped. Then, as shown in FIG. 5, the front end 116 of the side sill 66 extends rearward beyond the central portion 91 of the side sill 66.

The floor panel 45 also continues to the dashboard 54 from between the front ends 116 of the side sills 66 and 71 as shown in FIG.
A front impact load support member 56 is disposed in front of the dashboard 54.

Next, the vehicle body side structure 11 according to the embodiment will be mainly described with reference to FIGS.
As described above, the vehicle body side part structure 11 is connected to the end 115 of the floor panel 45 of the passenger compartment 26, and forms the lower part of the left side wall (the left side body 31) of the passenger compartment 26 from the front to the rear of the passenger compartment 26. A left side sill 66 extending to the left side sill, a right side sill 71 substantially symmetrical to the left side sill 66, and a center pillar 81 standing at the center (central portion 91) of the left and right side sills 66, 71. Also, as shown in FIGS. 2, 7, and 8, one end is connected to the cross member (front floor cross member 48) connecting the left and right side sills 66 and 71 in the vicinity of the center pillar 81, and the other. An end is coupled to the vertical side portion (inner vertical side portion 94) of the side sill 66, and a gusset 151 having a strength lower than the strength of the side sill 66 and the strength of the cross member (front cross member 48) is provided.

  The other end of the gusset 151 is coupled to the vertical side portion (inner vertical side portion 94) of the side sill 66, but may be joined to the inner lateral side portion 96 of the side sill 66 near the inner vertical side portion 94.

  “Substantially symmetrical” means that an asymmetric part is included in part. For example, different parts are created on the left and right sides depending on the form of the driver seat and the passenger seat. On the other hand, even if “substantially” is omitted and limited to “symmetric”, a part that is asymmetric is included.

  A side sill reinforcing frame 111 is provided along the vertical side portion (inner vertical side portion 94) of the side sill 66 with the upper surface portion 153 facing the center of the vehicle compartment 26 (in the direction of the arrow d1).

The lower end 156 of the center pillar stiffener 155 included in the center pillar 81 is integrated with the end 115 of the floor panel 45.
“Integrated” means a state in which the lower end 156 of the center pillar stiffener 155 is integrally coupled to the end 115 of the floor panel 45 via the inclined side portion 117 as shown in FIG. Specifically, the inclined side portion 117 and the lower end 156 of the center pillar stiffener 155 are joined by the side sill 66.

  As shown in FIG. 7, the center pillar 81 forms a closed section with the center pillar outer 161, the center pillar stiffener 155, and the center pillar stiffener 155 included in the side outer panel 83 arranged in order from the outside of the vehicle 12. The center pillar inner 162. A center pillar stiffener 155 and a center pillar inner 162 are erected on the inner lateral side 96 of the side sill 66. In addition, you may add a member inside and outside a closed cross section as needed.

Next, the side sill reinforcing frame 111 and the front floor cross member 48 will be described with reference to FIG.
The length of the side sill reinforcing frame 111 is from the front end 116 to the rear end 67 of the side sill 66.
When viewed from the front of the vehicle 12 (viewpoint in FIG. 8), the side sill reinforcing frame 111 has a closed cross section, a triangular cross section, and a bottom portion 164 that overlaps the floor panel 45. A reinforcing vertical side portion 165 that extends straight to and connects to the side sill 66 is formed, and an inclined reinforcing oblique side portion (upper surface portion 153) is formed by connecting to the reinforcing vertical side portion 165 and the bottom side portion 164. Yes. Both ends of the front floor cross member 48 are arranged on the upper surface portion 153.

  The front floor cross member 48 includes an upper cross member 168 and a lower cross member 171 disposed below the upper cross member 168. The lower cross member 171 is coupled to the upper cross member 168, and as shown in FIGS. 2 and 7, it is disposed between the front pillar 78 and the center pillar 81 in the longitudinal direction of the vehicle 12, and one end of the left side sill 66 is disposed at one end. The other end is joined to the right side sill 71.

  The upper cross member 168 has a main body 172 having a closed cross section, one end 173 of the main body 172 joined to the side sill 66, and a central portion 174 joined to the tunnel portion 46. The one end 173 is formed with a tip 176 that is thinned by forming a tapered portion 175 at the bottom. The tapered portion 175 is joined to the upper surface portion (reinforcement oblique side portion) 153 of the side sill reinforcing frame 111.

  Further, the first connecting portion 177 and the second connecting portion 178 are formed on the main body 172 so as to hang down to the floor panel 45 by a desired height, and the first connecting portion 177 is coupled to the lower cross member 171. . A second connecting part 178 is coupled to the tunnel frame 181.

The lower cross member 171 has a main body 183 formed in a groove shape, the edge of the groove is joined to the floor panel 45, one end (outer end) 184 of the main body 183 is joined to the side sill reinforcing frame 111, and the other end of the main body 183 ( The inner end 185 is coupled to the tunnel frame 181.
The tunnel frame 181 is formed in a tubular shape and extends along the tunnel portion 46.
The front floor cross member 48 is symmetrical with respect to the central axis C in FIG.

The front floor cross member 48 also has a gusset 151 coupled to one end 173 and the other end (see FIG. 2) of the upper cross member 168.
As shown in FIGS. 7 and 8, the gusset 151 is formed in a triangular shape when viewed from the front of the vehicle 12 (viewpoint in FIG. 8), and is formed in a U shape when viewed from the side of the vehicle 12, and includes an inclined portion 187 and a front side portion 188. The rear side portion 191, the ridge line portion 192, and the folded bead 193 are included.
An inclined portion 187 extends from the top portion of the upper cross member 168 to the inner lateral side portion 96 of the side sill 66. The front side portion 188 and the rear side portion 191 are joined to the inclined portion 187 so as to overlap along the side portion of the upper cross member 168.

  A bent bead 193 is formed on the inclined portion 187. Specifically, the folded bead 193 has a V-groove at a corner (ridge line portion 192) formed by the inclined portion 187 and the front side portion 188, and at a corner (ridge line portion 192) formed by the inclined portion 187 and the rear side portion 191. Is formed.

  Although the V-groove is formed as the folded bead 193, the shape of the folded bead 193 is arbitrary. It is sufficient that the strength of the gusset 151 is smaller than the strength of the side sill 66 and the strength of the front cross member 48 against the side impact load.

Next, the operation of the vehicle body side structure 11 according to the embodiment will be described.
As shown in FIGS. 1, 2, and 4, the vehicle body side structure 11 is configured so that the load input from the front wheel 24 when the vehicle 12 collides front is shown in FIG. 4 in the front end 116 of the side sill 66. Since the input is mainly made to the inner vertical side portion 94 and the outer vertical side portion 101, the collision performance of the frontal collision can be ensured.

  That is, in the vehicle body side structure 11, when the vehicle 12 collides head-on, the load input from the front wheel 24 is the entire inner vertical side portion 94 of the side sill 66, the horizontal bottom side portion 102, and the vehicle interior 26 of the inner lateral side portion 96. Therefore, the collision performance of the frontal collision can be ensured.

Specifically, the front end 116 of the side sill 66 is in contact with the rear surface of the front wheels 24 facing the rear of the vehicle and receives the compressive load, and the inner vertical side portion 94 and the inner vertical side portion 94 are orthogonal to the inner vertical side portion 94. Since the lateral side portion 96 forms an inverted L shape, the load from the front wheel 24 can be efficiently transmitted mainly to the side sill inner 86.
Further, since the load from the front wheel 24 is efficiently transmitted mainly to the side sill inner 86, the thickness of the side sill outer 87 can be reduced, and the weight of the side sill 66 can be reduced.

  Further, the vehicle body side structure 11 ensures that the side sill 66 is not easily deformed into a rhombus as compared to a quadrangle by the inclined side portion 104 of the side sill 66 when the vehicle 12 is subjected to a side collision. be able to.

  In addition, the vehicle body side structure 11 has a quadrangular cross-sectional shape of the rear portion 92 of the side sill 66 when a rear collision occurs after the vehicle 12 or when a side collision occurs with the rear door of the rear entrance 18. A reaction force against compression, bending, and twisting can be ensured, and collision performance against rear-end collision or side collision can be ensured.

  Specifically, as shown in FIG. 2, the lower portion 14 of the vehicle body 13 including the side sill 66 is connected to the lower end 145 of the center pillar 81 when the opponent vehicle collides with the center pillar 81 as indicated by an arrow a <b> 2 in a side collision. The side sill 66 is started to be deformed as shown by a two-dot chain line toward the inner side in the left-right direction of the vehicle 12 (in the direction of the arrow a3), in other words, into the passenger compartment 26. Since the distance L2 from the center pillar 81 to the middle cross member 53 is shorter than the distance L1 from the center pillar 81 to the front pillar 78, the middle cross member 53 receives a larger load than the front collision load support member 56, and the side sill The rear end 67 of 66 has a tendency of bending deformation, but a reaction force against bending can be secured by making the cross-sectional shape a quadrangle.

  Further, as shown in FIGS. 1 and 2, even if the opponent vehicle collides with the left front side frame 36 as indicated by an arrow a4, the load is applied to the front pillar 78 or a member joined by the front impact load support member 56. Since the dispersion is substantially uniform, the amount of torsional deformation generated at the front end 116 of the side sill 66 is small.

  On the other hand, as shown in FIG. 3, when the opponent vehicle collides with the rear frame 73 as indicated by an arrow a5, the rear frame 73 is disposed higher than the side sill 66 (arrow a6). Stress concentrates on the front portion 75 of the frame 73 and the bent portion 73 a of the rear frame 73. That is, as shown in FIGS. 2 and 3, the front portion 75 of the rear frame 73 is bent upward and deformed as indicated by a two-dot chain line, thereby absorbing the rear impact energy. Although the bending deformation of the rear end 67 of the side sill 66 increases, a reaction force against bending can be ensured by making the cross-sectional shape a square.

Next, the operation of the vehicle body side structure 11 according to the embodiment will be described with reference to FIG.
FIG. 9A corresponds to FIG. 8 and shows a state before a side collision, and FIG. 9B shows a state after a side collision.

  In the vehicle body side structure 11, as shown in FIG. 9B, when a side collision occurs, the load is mainly absorbed by the gusset 151, and the center pillar 81 does not fall down greatly.

  Specifically, the gusset 151 is installed at a joint between the front floor cross member 48 and the side sill 66, and a load is applied to the center pillar 81 due to a side collision in which the opponent vehicle contacts the side surface of the vehicle 12 as indicated by an arrow d2. When the input is made, the center pillar 81 starts to fall toward the passenger compartment 26, and as the side sill 66 rotates (twist) as shown by the arrow d3, the gusset 151 is pushed and crushed and compressed and deformed. That is, the gusset 151 absorbs the impact of the side collision. At that time, when a compressive load is applied to the gusset 151, the load applied to the folded bead 193 increases, and the folded bead 193 is removed before the front floor cross member 48 starts to deform and before the side sill 66 is largely deformed. Compressive deformation at the starting point. As a result, the front floor cross member 48 disperses the rotational force of the side sill 66 without compressive deformation. Accordingly, it is possible to suppress the amount of the center pillar 81 falling into the vehicle interior 26.

  Further, in the vehicle body side structure 11, when the center pillar 81 and the side sill 66 begin to deform due to a side collision, the tapered portion 175 formed on the upper cross member 168 of the front floor cross member 48 and the upper surface portion 153 of the side sill reinforcing frame 111 are formed. Since the load is transmitted, deformation of the one end 173 of the front floor cross member 48 (upper cross member 168) can be suppressed.

  The vehicle body side part structure of the present invention is suitable for a vehicle.

  DESCRIPTION OF SYMBOLS 11 ... Car body side part structure, 26 ... Car compartment, 31 ... Left side wall (left side body), 45 ... Floor panel, 48 ... Cross member (front cross member), 66 ... Left side sill, 71 ... Right side sill , 81 ... Center pillar, 91 ... Center of left and right side sill (center part), 94 ... Vertical side part (inner vertical side part), 111 ... Side sill reinforcement frame, 115 ... End of floor panel, 151 ... Gusset, 153 ... the upper surface of the side sill reinforcement frame, 155 ... the center pillar stiffener, 156 ... the lower end of the center pillar stiffener.

Claims (3)

A left side sill that extends from the front to the rear of the left side sill that extends from the front to the rear of the left side sill, and a left side sill that is substantially symmetrical to the left side sill. In the vehicle body side structure provided with a center pillar erected in the center of the right side sill,
In the vicinity of the center pillar, one end is coupled to the cross member coupling the left and right side sills, the other end is coupled to the vertical side portion of the side sill, the strength of the side sill against a side impact load, and the cross member A vehicle body side structure comprising a gusset having a strength lower than that of the vehicle.   The vehicle body side part structure according to claim 1, wherein a side sill reinforcing frame is provided along a vertical side portion of the side sill with an upper surface portion facing a center of the vehicle compartment.   The vehicle body side part structure according to claim 1 or 2, wherein a lower end of a center pillar stiffener included in the center pillar is integrated with an end of the floor panel.

Images