JP2007237896A - Vehicle body lower part structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain deformation of a pillar to the indoor side in side surface collision of a vehicle body lower part furnished with a clearance to insert a wire harness through between a pillar lower end of the vehicle body and a side part of a floor panel. <P>SOLUTION: This vehicle body lower part structure of an automobile is constituted by providing the clearance S to insert the wire harness W through between a floor panel side part 11 a lower edge of which is connected to a locker part 2 by bending below a side edge of the floor panel 1 and setting a floor cross member 5 making a closed cross-section with the floor panel 1 at a position corresponding to the pillar 3 on a lower surface of the floor panel 1, the wire harness W is made to pass through the clearance S, a reinforcing member 4 to block the clearance S by closely fitting in the clearance S and a collision load working on a lower end of the pillar 1 in the side surface collision of the vehicle is received by a rigid part of the floor panel 1 reinforced by the floor cross member 5 through the reinforcing member 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lower body structure of an automobile, and more particularly to a lower body structure in which a wire harness is routed along a rocker portion on a side portion of a floor panel.

  2. Description of the Related Art Conventionally, in an automobile, a wire harness is routed along a boundary between a side edge of a floor panel of a passenger compartment and a rocker portion coupled thereto (see, for example, Patent Document 1). In Patent Document 1, it is proposed to provide a groove on the side edge of the floor panel, route the wire harness in the groove, and cover the groove with a protector to protect the wire harness.

  In an automobile such as a sports utility vehicle (SUV) in which the vehicle body is mounted on a chassis frame via a rubber mount, the height of the floor panel is higher than the locker part, and along the upper surface of the locker part The wiring harness has been routed. FIG. 7 and FIG. 8 show a conventional example of the lower body structure of this type of automobile. The floor panel 1 raised above the chassis frame 6 is bent with its panel side edge portion 10 bent obliquely downward. The wire harness W is routed along the vehicle inner side of the upper surface of the rocker portion 2, which is coupled to the inner surface of the upper surface of the rocker portion 2 lower than the panel 1.

At the portion where the intermediate pillar 3 at the front and rear intermediate portion of the rocker portion 2 is erected, the intermediate pillar 3 is erected on the vehicle exterior of the upper surface of the rocker portion 2, and the panel side edge of the floor panel 1 corresponding to the intermediate pillar 3 The part 10 is provided with an overhang part 11 projecting to the outside of the vehicle. A gap S is formed between the lower part of the intermediate pillar 3 and the overhang part 11 of the floor panel 1, and the wire harness W is passed through the gap S. I am trying to route it. In addition, the floor panel 1 is provided with a reinforced rigid portion provided with a floor cross member 5 extending in the vehicle width direction along the lower surface of the floor at a position corresponding to the intermediate pillar 3 and having a closed cross section with the lower surface of the floor. ing. The floor panel 1 is supported by a chassis frame 6 via a rubber mount (not shown) at a rigid portion reinforced by a floor cross member 5 or the like.
JP 2001-239899 A

  However, in the vehicle body lower part structure of the frame vehicle described above, the gap S for routing the wire harness W is provided between the floor panel 1 and the lower part of the intermediate pillar 3, so When the vicinity of the lower part is pushed into the inside of the vehicle, the collision load is not immediately transmitted from the lower part of the intermediate pillar 3 to the rigid part side of the floor panel 1, and the gap S is crushed and the lower part of the intermediate pillar 3 enters the inner side of the car. There arises a problem that deformation (virtual line in FIG. 8) becomes large. Therefore, the present invention efficiently transmits the collision load from the lower part of the pillar to the floor panel side at the time of a side collision in a vehicle having a gap for wiring the wire harness between the side part of the floor panel and the lower part of the pillar. An object of the present invention is to provide a lower body structure of an automobile that suppresses deformation of the pillar to the inside of the vehicle by receiving a collision load at a rigid portion of the floor panel having a closed cross section with the floor cross member. It is.

  The present invention includes a floor panel side portion that is bent downward to a side edge of a floor panel of a passenger compartment and whose lower edge is coupled to a rocker portion of a vehicle body. The floor panel side portion and the rocker portion are provided on the floor panel side portion. A gap for inserting a wire harness routed along the upper surface of the rocker portion is provided between the lower portion of the pillar and the floor panel is provided on the lower surface of the floor panel at a position corresponding to the pillar. In the lower body structure of an automobile provided with a floor cross member having a closed cross section, the wire harness passes through the gap between the side of the floor panel and the lower part of the pillar, and is fitted into the gap. A reinforcing member for closing the gap is provided. In the event of a side collision, if a collision load that pushes it to the inside of the vehicle acts on the lower part of the pillar, the collision load is immediately transmitted to the rigid part of the floor panel that forms a closed cross section with the floor cross member via the reinforcing member. Since it can be received, deformation of the pillar to the inside of the vehicle can be suppressed.

  The reinforcing member is provided in the gap of the automobile in which the vehicle body including the floor panel, the rocker portion and the pillar is supported by the chassis frame. The reinforcing member is composed of a rectangular cylinder that fits tightly into the gap, and the longitudinal length thereof is set to be substantially the same as or longer than the longitudinal length of the pillar, and the wire harness is passed through a center hole. The upper wall portion of the reinforcing member is formed substantially flush with the general portion of the floor panel, and the lower wall portion of the reinforcing member is formed on the upper surface of the rocker portion provided at the same height or lower position as the bottom wall of the floor cross member. It abuts (Claim 2). In an automobile in which the vehicle body is supported by the chassis frame, a gap for inserting the wire harness is provided between the floor panel and the lower part of the pillar, and a reinforcing member is provided in the gap. It is suitable for suppressing deformation of the lower part of the pillar at the time of collision. Since the reinforcing member is composed of a rectangular cylindrical body, it is suitable for penetrating the wire harness and tightly fitting in the gap. When a side collision occurs, the collision load is closed with the floor cross member via the upper wall portion and the lower wall portion. It is efficiently transmitted to the rigid part of the floor panel having a cross section. In addition, since the longitudinal length of the reinforcing member is the same as or longer than the lower part of the pillar, the inner surface of the pillar abuts the reinforcing member over the entire length in the longitudinal direction, so that the reinforcing member acts from the inner surface side of the pillar during a side collision. Since the load is efficiently received and transmitted to the floor panel side, local crushing deformation of the inner surface of the vehicle under the pillar can be suppressed.

  The upper wall portion and the lower wall portion of the reinforcing member are each formed thick. Alternatively, each of the upper wall portion and the lower wall portion of the reinforcing member is provided with a plurality of reinforcing ribs along the vehicle width direction. Strengthen the strength of the reinforcement members against impact loads.

  According to the vehicle lower body structure of the present invention, in a vehicle having a gap for wiring the wire harness between the side portion of the floor panel and the lower portion of the pillar, a reinforcing member is provided in the gap so that the pillar Since the collision load acting on the lower portion is received by the rigid portion of the floor panel having a closed cross section with the floor cross member via the reinforcing member, the deformation of the pillar toward the inside of the vehicle can be suppressed.

  An embodiment in which the present invention is applied to an SUV type frame car shown in FIG. 7 will be described. As shown in FIG. 1, the floor panel 1 is provided at a position one step higher than the rocker portion 2 located outside the chassis frame 6, and the side portion of the floor panel 1 is bent from the side edge of the general portion. An inclined floor panel side edge 10 extending obliquely downward on the vehicle exterior side is formed. The floor panel 1 has the lower edge of the floor panel side edge portion 10 overlapped with the side edge of the upper surface of the rocker portion 2 on the vehicle inner side. The rocker portion 2 is constituted by an inner panel and an outer panel having a substantially U-shaped cross section facing each other, and has a closed cross-sectional structure in which the upper edge flanges and the lower edge flanges of both panels are coupled.

  As shown in FIGS. 1, 3, and 4, an intermediate pillar 3 is erected on the rocker portion 2 at the front and rear intermediate positions. The intermediate pillar 3 has a closed section formed by an inner panel 31 and an outer panel 32, and a reinforcement 33 is provided and reinforced along the outer panel 32 in the pillar.

  At the lower end of the intermediate pillar 3, the lower end portion 34 of the inner panel 31 is inclined obliquely downward toward the vehicle outer side, and the pillar width in the vehicle width direction is gradually narrowed toward the vehicle outer side. On the other hand, the pillar width before and after the lower end of the intermediate pillar 3 is formed to gradually widen downward (FIG. 3). The lower end of the intermediate pillar 3 is integrally connected to the lower edge flange of the lower end portion 34 of the inner panel 31 with the connecting portion of the upper edge flange of the rocker portion 2, and the lower edge of the outer panel 32 is connected to the upper surface of the outer panel of the rocker portion 2 It is joined in a sealed manner along the upper edge of the vehicle outer surface without any gap. The intermediate pillar 3 is covered with its rear edge when the door D that opens and closes the door opening on the side of the vehicle body is closed.

  At a position corresponding to the intermediate pillar 3, the floor panel 1 is provided with a rigid portion reinforced by providing a floor cross member 5 extending in the vehicle width direction on the lower surface thereof. The floor cross member 5 has an inverted hat shape in cross section, and the upper edge flanges 52 and 52 rising from the front and rear side edges of the bottom wall 51 are joined to the lower surface of the floor panel 1 and closed with the floor panel 1. A cross section is formed (FIG. 5). The height dimension of the floor cross member 5 is substantially the same as the height dimension of the floor panel side edge 10, and the edges of the front and rear side walls 52, 52 of the floor cross member 5 are coupled to the lower surface of the floor panel side edge 10. It is. The bottom wall 51 of the floor cross member 5 is provided at a position substantially the same as or slightly higher than the upper surface of the rocker portion 2, and the side edge of the bottom wall 51 is coupled to the upper end of the inner surface of the rocker portion 2. The floor cross member 5 is provided with an auxiliary member 50 between the lower surface of the end portion of the bottom wall 51 and the lower end of the inner surface of the rocker portion 2.

  The floor panel side edge portion 10 facing the intermediate pillar 3 is provided with an overhang portion 11 projecting toward the pillar side. The overhanging portion 11 is an upper wall that is substantially flush with the general portion of the floor panel 1, a side wall that bends from the outer edge of the vehicle and extends obliquely downward to the outer side of the vehicle, and bends from the front and rear edges. Thus, the front wall and the rear wall extending downward and toward the vehicle interior are formed in a box shape that opens toward the vehicle interior and downward. The overhanging portion 11 has an inner edge of the upper wall connected to the upper surface of the general portion of the floor panel 1, an inner edge of the front wall and the rear wall connected to the floor panel side edge 10, and a side wall. The lower edge is coupled to the upper surface of the rocker portion 2 to form a closed cross-sectional structure. The front-rear width of the overhang portion 11 is substantially the same as the front-rear width of the floor cross member 5, and is provided as an extension of the floor cross member 5.

  The wire harness W is routed in the front-rear direction along the upper surface of the rocker portion 2 between the lower end portion 34 on the vehicle interior side of the intermediate pillar 3 and the overhanging portion 11 of the floor panel 1 facing in the vehicle width direction. A gap S is formed. The gap S is formed so that the upper surface of the inner panel of the rocker portion 2 is the bottom, and the lower end portion 34 of the inclined intermediate pillar 3 and the side wall of the extending portion 11 are opened slightly diagonally upward toward the inside of the vehicle. The reinforcing member 4 is inserted into the gap S.

  As shown in FIGS. 1 to 4, the reinforcing member 4 is formed of a molded product made of a relatively rigid synthetic resin such as polypropylene, nylon, or fiber reinforced synthetic resin mixed with a reinforcing material such as glass fiber. is there. The reinforcing member 4 is a rectangular cylinder composed of an upper wall portion 41, a lower wall portion 42, and both side wall portions 43, 44 on the outside of the vehicle interior side, and is formed so that the wire harness W is inserted into the center hole 40. .

  The longitudinal length of the reinforcing member 4 is substantially the same as or slightly longer than the longitudinal length of the lower end of the intermediate pillar 3 excluding the front and rear coupling flanges. The reinforcing member 4 is formed such that the height of the intermediate portion 4b is higher than that of the front end portion 4a and the rear end portion 4c. The intermediate portion 4b is provided corresponding to the overhanging portion 11 of the floor panel 1, and the front-rear length of the intermediate portion 4b is the same as or slightly longer than the front-rear width of the overhanging portion 11. In the intermediate part 4b, the upper wall part 41 is thicker than the left and right side wall parts 43, 44, and is flush with the general part of the floor panel 1 and the upper wall of the overhanging part 11. It is formed horizontally. Thereby, the height dimension of the intermediate part 4b is matched with the height dimension from the upper surface of the rocker part 2 to the floor panel 1.

  The lower wall portion 42 of the reinforcing member 4 is formed to be thick like the upper wall portion 41, and the lower wall portion 42 is substantially the same height as the bottom wall 51 of the floor cross member 5 along the upper surface of the rocker portion 2. It is made to contact with the upper surface of the rocker part 2 and is formed horizontally.

  The reinforcing member 4 is inserted into the gap S from the upper inside of the vehicle with the wire harness W passing through the center hole 40 in the front-rear direction, and the lower wall portion 42 is brought into contact with the upper surface of the rocker portion 2, so The both side wall portions 43 and 44 are in close contact with the side wall of the overhanging portion 11 and the lower end portion 34 of the intermediate pillar 3 so as to close the gap S. In this case, the height of the upper wall portion 41 of the intermediate portion 4b matches the height of the general portion of the floor panel 1 and the upper wall of the overhanging portion 11, and is a tongue-like shape projecting to the vehicle inner side of the upper wall portion 41. The mounting piece 411 is superposed on the upper wall of the overhanging portion 11, and both are fixed by clip fastening or screw tightening.

  According to this embodiment, the reinforcing member 4 having the wire harness W penetrated in the gap S between the lower end portion 34 of the intermediate pillar 3 and the overhanging portion 11 on the side of the floor panel 1 is closely fitted to the gap S. Therefore, even if the opponent vehicle T collides with the vicinity of the lower end of the intermediate pillar 3 at the time of a side collision of the vehicle, the collision load is immediately transmitted from the intermediate pillar 3 side to the floor panel 1 side via the reinforcing member 4. It is received on the floor panel 1 side, and thereby, the intermediate pillar 3 can be prevented from being deformed to the inside of the vehicle. On the floor panel 1 side, the collision load is received by the rigid portion of the floor panel 1 having a closed cross section with the floor cross member 5, so that deformation on the floor panel 1 side is also suppressed.

  Since the reinforcing member 4 has a thick upper wall portion 41 and lower wall portion 42, it has strength against a collision load at the time of a side collision, and the upper wall portion 41 extends the general portion of the floor panel 1 to the outside of the vehicle. The lower wall portion 42 is formed horizontally along the upper surface of the rocker portion 2 so as to extend the bottom wall 51 of the floor cross member 5 to the outside of the vehicle. The impact load is efficiently transmitted to the floor panel 1 side, and on the floor panel 1 side, the closed cross section of the floor panel 1 and the floor cross member 5 can receive a collision load with a good balance in the vertical direction.

  Further, at the time of a side collision, the collision load acting on the outer surface of the pillar vehicle at the lower end of the intermediate pillar 3 tries to push the inner surface of the pillar vehicle into the vehicle inner side through both side surfaces of the pillars before and after the intermediate pillar 3. Since the longitudinal length of the intermediate pillar 3 is equal to or longer than the longitudinal length of the intermediate pillar 3, the inner surface of the pillar wheel and the reinforcing member 4 are in contact with each other over the entire length in the front-rear direction, and the reinforcing member 4 efficiently receives the collision load acting from the pillar 3 side. Since it transmits to the floor panel 1 side, the local crushing deformation | transformation of the said pillar vehicle inner surface is suppressed. In addition, since the longitudinal length of the intermediate portion 4b of the reinforcing member 4 is set to be equal to or longer than the longitudinal width of the floor cross member 5, the collision load from the intermediate pillar 3 can be reliably transmitted to the rigid portion of the floor panel 1. .

  Next, another embodiment of the present invention will be described with reference to FIG. The basic structure of the present embodiment is almost the same as that of the previous embodiment, and differences will be mainly described. In the drawings, the same members are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, as the reinforcing member 4 closely fitted in the gap S, the upper wall portion 41 and the lower wall portion 42 are not thick, but are approximately the same thickness as the side wall portions 43 and 44, and the upper wall portion 41 In addition, a member provided with a plurality of vertical plate-like reinforcing ribs 45 and 46 along the vehicle width direction is used for the lower wall portion 42.

  The reinforcing member 4 is formed so that the upper end and the lower end of both side wall portions 43 and 44 protrude upward and downward from the upper wall portion 41 and the lower wall portion 42 surrounding the center hole 40, respectively. The upper wall portion 41 has reinforcing ribs 45 extending in the vehicle width direction between the upper ends of both side wall portions 43, 44 protruding upward from the upper wall portion 41 at a predetermined interval at the front and rear positions on the upper wall portion 41. A plurality of them are formed. In the same manner, the lower wall portion 42 has reinforcing ribs 46 extending in the vehicle width direction between the lower ends of both side wall portions 43, 44 extending downward from the lower wall portion 42. Are formed at predetermined intervals.

  According to the present embodiment, the reinforcing member 3 has the upper wall portion 43 and the lower wall portion 42 formed by the plurality of reinforcing ribs 45 and 46 provided on the upper wall portion 43 and the lower wall portion 42 as in the previous embodiment. Even if it is not thick, the strength of the reinforcing member 3 against the collision load at the time of a side collision can be increased, and the reinforcing member 3 can be economical in terms of weight and cost. At the time of a side collision, the same effect as the previous embodiment can be exhibited, and deformation of the intermediate pillar 3 into the vehicle can be suppressed.

  The present invention can be suitably used for a vehicle body lower structure of a frame vehicle provided with a gap through which a wire harness is inserted between the lower end of the pillar and the side portion of the floor panel. You may apply to the vehicle body lower part structure of the monocoque body vehicle which has.

It is a cross section in the position which follows the HH line of Drawing 7 which shows the body lower part structure to which the present invention is applied. It is a perspective view of the reinforcement member used for this invention. It is the perspective view seen from the vehicle inside of the said vehicle body lower part structure. It is a schematic plan view of the said vehicle body lower part structure. It is sectional drawing which follows the VV line of FIG. It is a cross section which shows the other vehicle body lower part structure of this invention corresponding to FIG. 1 is a schematic side view of an automobile to which the present invention is applied. It is a cross section which shows the conventional vehicle body lower part structure corresponding to FIG.

Explanation of symbols

1 Floor panel 11 Overhang (side of floor panel)
2 Locker 3 Intermediate pillar (pillar)
34 Lower end portion of pillar 4 Reinforcing member 40 Center hole 41 Upper wall portion 42 Lower wall portion 45, 46 Reinforcing rib 5 Floor cross member 6 Chassis frame

Claims (4)

Between the side of the floor panel, which is provided on the side edge of the floor panel of the passenger compartment, bent downward and joined to the rocker part of the vehicle body, and the lower part of the pillar standing on the rocker part And a floor cross member having a closed cross section with the floor panel at a position corresponding to the pillar on the lower surface of the floor panel. In the undercarriage of automobiles with
A vehicle body lower part of an automobile characterized in that a reinforcing member is provided in the gap between the side of the floor panel and the lower part of the pillar so as to penetrate the wire harness and fit into the gap to close the gap. Construction. The reinforcing member is provided in the gap of the automobile in which the vehicle body including the floor panel, the rocker portion and the pillar is supported by the chassis frame,
The reinforcing member is composed of a rectangular cylinder that fits tightly into the gap, and the longitudinal length thereof is set to be substantially the same as or longer than the longitudinal length of the pillar, and the wire harness is passed through a center hole.
The upper wall portion of the reinforcing member is formed substantially flush with the general portion of the floor panel, and the lower wall portion of the reinforcing member is formed on the upper surface of the rocker portion provided at the same height or lower position as the bottom wall of the floor cross member. The vehicle body lower part structure according to claim 1, which is in contact with the vehicle body.   3. The vehicle body lower part structure according to claim 1, wherein the upper wall portion and the lower wall portion of the reinforcing member are formed thick.   The vehicle body lower part structure according to claim 1 or 2, wherein a plurality of reinforcing ribs are provided on the upper wall portion and the lower wall portion of the reinforcing member respectively along the vehicle width direction.