JP6058412B2 - Lower body structure of automobile - Google Patents

Description

  The present invention relates to a lower vehicle body structure for an automobile in which left and right vehicle body components disposed on a lower surface side of a floor member are connected by a reinforcing member.

  In automobiles, in order to increase the torsional rigidity of the lower car body against vibration during travel, the left and right side members and the central part in the vehicle width direction of the suspension cross member that connects the side members are provided by reinforcing members. In some cases, they are connected (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 5-116648

  By the way, in the conventional lower vehicle body structure, since the reinforcing member is dedicated to countermeasures against torsion of the vehicle body, it is necessary to add a new reinforcing member in order to improve the handling stability and the ride comfort. In addition, there is a problem that the productivity deteriorates as the weight of the vehicle body increases.

  The present invention has been made in view of the above-described conventional situation, and provides a lower vehicle body structure for an automobile that can improve the torsional rigidity of the lower vehicle body and improve the handling stability and the ride comfort without adding another member. The issue is to provide.

In the first aspect of the present invention, a seat is fixed on the upper surface side of the floor member, and on the lower surface side of the floor member, vehicle body components are disposed on the left and right in the vehicle width direction across the vehicle center line, In the lower body structure of an automobile in which a reinforcing member for connecting the left and right body constituting members so as to bridge in the vehicle width direction is provided,
A seat mounting member that forms an upper closed section box portion is disposed on the upper surface side of the floor member, and an outrigger that forms a lower closed section box portion is disposed on the lower surface side of the floor member so as to face each other with the floor member interposed therebetween. Is fixed to the vehicle body component,
The reinforcing member is fixed to the vehicle body constituting member such that one side portion in the longitudinal direction bridges a plurality of fixing portions to the floor member of the seat ,
Between the seat mounting member and the floor member, and between the floor member and the outrigger, a bulk member that connects the fixing portion and one side portion of the reinforcing member is connected across the top and bottom. It is a feature.

  According to a second aspect of the present invention, in the lower body structure of the automobile according to the first aspect, a lashing hook is attached to the vicinity of the end of the other side of the reinforcing member. The pulling direction of the lashing rope locked to the tying hook and the axis of the reinforcing member substantially coincide with each other.

  According to the lower vehicle body structure of the first aspect of the present invention, the reinforcing member that connects the left and right vehicle body constituent members in the vehicle width direction is arranged so as to bridge the plurality of fixing portions of the seat. While suppressing torsion of the lower vehicle body, the torsion of the fixing portion of the seat is positively suppressed, so that the rigidity of the vehicle body can be increased in terms of experience. As a result, the torsional rigidity of the lower vehicle body can be increased, and the steering stability and the ride comfort can be improved without adding a new reinforcing member. As a result, the cost and the vehicle body weight can be suppressed, and the productivity can be improved.

  According to the invention of claim 2, a lashing hook is attached in the vicinity of the end of the other side portion of the reinforcing member, and the pulling direction of the lashing rope locked to the lashing hook is substantially coincident with the axis of the reinforcing member. As a result, part of the tensile force acting on the lashing hook can be borne by the reinforcing member, and the proof strength against the tensile load acting on the lashing hook during vehicle transportation can be increased.

It is a bottom view of the lower car body of the car by Example 1 of the present invention. It is a perspective view of the said lower vehicle body. FIG. 3 is a sectional view of the lower vehicle body (a sectional view taken along line III-III in FIG. 2). It is sectional drawing (IV-IV sectional view taken on the line of FIG. 2) of the said lower vehicle body. It is a perspective view of the said lower vehicle body to which the lashing hook was attached.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 5 are views for explaining a lower body structure of an automobile according to a first embodiment of the present invention. In this embodiment, front and rear and left and right mean front and rear and left and right as viewed in the direction of travel of the automobile.

In the figure, reference numeral 1 denotes a lower body of an automobile. The lower vehicle body 1 includes a floor member 2, a pair of left and right seats 3, 3 disposed on the upper surface side of the floor member 2, and a vehicle center line C on the lower surface side of the floor member 2. The vehicle body constituting members 4 and 4 are provided on the left and right sides in the vehicle width direction.

  The vehicle body constituting member 4 is disposed so as to extend in the vehicle front-rear direction, and has a cross-section upward hat-shaped left and right side members 5 coupled to the lower surface of the floor member 2, and the left and right side members 5. The left and right rocker panels 6 have a closed cross-section rectangular tube shape that is disposed outside the vehicle so as to extend in the vehicle longitudinal direction.

  The rear end portions 6c of the left and right rocker panels 6 are coupled to each other by a cross member 10 extending in the vehicle width direction, and the rear end surfaces of the left and right side members 5 are coupled to the cross member 10. ing.

  Further, the vehicle body component member 4 includes a torque box 7 having a hat-like cross section that connects a front end portion 6a of the left and right rocker panels 6 and the left and right side members 5, and the left and right rocker panels. 6 and an outrigger 8 having a cross-section with an upward-facing hat shape connecting the left and right side members 5. The outrigger 8 and the torque box 7 are coupled to the side member 5, the rocker panel 6 and the floor member 2.

  A tunnel portion 2a bulging upward is formed at the center of the floor member 2 in the vehicle width direction, and a floor rein hose 9 extending in the front-rear direction is formed at the lower left and right corner portions of the tunnel portion 2a. Are combined. The left and right outer flanges 2b of the floor member 2 are coupled to the left and right rocker panels 6.

  A pair of front and rear front and rear seat attachment members 13 and 14 are disposed at portions corresponding to the left and right seats 3 on the upper surface of the floor member 2, respectively. The left and right front and rear seat attachment members 13 and 14 have a hat shape with a cross-section facing downward, and are coupled to the floor member 2, the tunnel portion 2 a and the rocker panel 6.

  The left and right rear seat attachment members 14 are arranged to face the outrigger 8 with the floor member 2 interposed therebetween. Thus, upper and lower closed cross-section box portions 17 and 18 are formed on the upper side surface and the lower side surface of the floor member 2, respectively (see FIG. 3).

  On the left and right sides of the left and right front and rear seat mounting members 13 and 14, a substantially U-shaped indoor bulk member 15 is disposed. Each of the bulk members 15 is connected to the seat mounting member 14 and the floor member 2 so as to be bridged up and down.

  In addition, floor-side bulk members 16 are respectively disposed in the outrigger 8 and the floor rein hose 9 at portions facing the indoor bulk member 15, and each bulk member 16 is connected to the floor member 2. Are connected to the outrigger 8 so as to extend vertically.

  The indoor bulk member 15 and the underfloor bulk member 16 are arranged so that the edges 15a and 16a substantially coincide when viewed in the vertical direction (see FIG. 2).

  The left and right front fixing portions 3a and 3a of the seat 3 are bolted and fixed together with the indoor bulk member 15 to the left and right end portions of the front seat mounting member 13 (see FIG. 1).

  The left and right rear fixing portions 3b and 3b of the seat 3 are bolted and fixed together with the indoor bulk member 15 to the left and right ends of the rear seat mounting member 14 (see FIG. 3).

  The left and right torque boxes 7 and the left and right outriggers 8 are first and second crossbars (reinforcing members) disposed so as to bridge the vehicle center line C in the vehicle width direction. 20 and 21 are connected. The first and second crossbars 20 and 21 are arranged so as to intersect each other so as to form an X shape, and the intersecting portions are not fixed. In addition, you may fix this intersection part with a volt | bolt etc.

  The left and right outriggers 8 are connected to each other by a brace (reinforcing member) 22 arranged so as to bridge the vehicle center line C in the vehicle width direction.

  A securing hook 26 is attached to each of the left and right torque boxes 7 positioned at the front end portions 20a and 21a of the first and second crossbars 20 and 21, respectively. The left and right lashing hooks 26 are located on an extension line of the axis b of the first and second crossbars 20 and 21, and when viewed in a plane, are secured to the lashing hooks 26. The binding rope 27 is arranged so that the pulling direction a thereof substantially coincides with the axis b of the first and second crossbars 20 and 21 (see FIGS. 1 and 5).

  The first and second crossbars 20 and 21 and the brace 22 are made of a pipe material and are arranged below the floor member 2 so as to cross each other, and have the following structure in detail.

  When viewed from above the vehicle, the first crossbar 20 has a front end portion 20a bolted to the lower surface of the left torque box 7 and a rear end portion 20b fixed to the lower surface of the right outrigger 8 on the floor-side bulk member. It is fixed with bolts 16 together. Here, the front end portion 20a and the rear end portion 20b are formed in a plate shape by pressing the pipe material with a press or the like, and the same applies to the second crossbar 21 and the brace 22 described later. It has a structure.

  The front end 21a of the second crossbar 21 is bolted and fixed to the lower surface of the right torque box 7, and the rear end 21b is fixed to the lower surface of the left outrigger 8 when viewed from above the vehicle. Bolts are fixed together with the member 16.

The brace 22 is fixed to the right outrigger 8 and the underfloor side bulk member 16 by bolts 24 together with the right end 22a together with the rear end 20b of the first crossbar 20 when viewed from above the vehicle. The left end portion 22b is fastened together with the rear end portion 21b of the second crossbar 21 to the left outrigger 8 and the underfloor side bulk member 16 by bolts 25.

  The first and second crossbars 20, 21 have longitudinal rear side portions (one side portions) 20 ', 21' that bridge the front and rear fixing portions 3a, 3b of the left and right seats 3, respectively. Arranged to pass. Specifically, the rear side portions 20 'and 21' are disposed so as to pass through the front side fixing portion 3a on the vehicle inner side and the rear side fixing portion 3ba on the outer side of the vehicle, and the rear side portions 20 'and 21' The part facing the front fixing part 3a is bolted and fixed to the lower surface of the floor rein hose 9 together with the underfloor bulk member 16, and the part facing the rear fixing part 3b is connected to the outrigger 8 as described above. Bolts are fixed together with the member 16.

  The brace 22 is arranged so that the left and right side portions (one side portion) 22 ′ in the longitudinal direction bridge the rear fixing portions 3 b of the left and right seats 3 in the vehicle width direction. The portions of the brace 22 facing the rear fixing portions 3b on the vehicle inner side are bolted and fixed to the lower surface of the floor rein hose 9 together with the underfloor bulk member 16. Moreover, the site | part which opposes each rear side fixing | fixed part 3b of the vehicle outer side is bolted and fixed to the outrigger 8 with the floor back side bulk member 16 as mentioned above.

  According to this embodiment, the left and right torque boxes 7 and the left and right outriggers 8 are connected by the first and second crossbars 20 and 21, and the left and right outriggers 8 are connected by the braces 22. The first and first crossbars 20 and 21 and the brace 22 are arranged so as to bridge the front and rear fixing portions 3a and 3b of the left and right seats 3.

  Since the first and second crossbars 20 and 21 and the brace 22 suppress the twist of the lower vehicle body 1, the front and rear fixing portions 3a and 3b of the seat 3 are positively twisted. As a result, the torsional rigidity in the front, rear, left and right and up and down directions of the entire lower vehicle body 1 can be increased, and the mounting rigidity of the seat 3 can be increased. Can do. As a result, while improving the torsional rigidity of the lower vehicle body 1, it is possible to improve the handling stability and the ride comfort without adding a new reinforcing member, thereby reducing the cost and the vehicle weight and improving the productivity. .

  Since the first and second crossbars 20 and 21 and the brace 22 are disposed on the rear seat mounting portion 14 on the upper and lower closed surface box portions 17 and 18 formed on the upper and lower surfaces of the floor member 2, The mounting rigidity of the seat 3 can be further increased, and the handling stability and ride comfort can be greatly improved. Such a structure has a great effect when applied to an open body vehicle.

  In this embodiment, a lashing hook 26 is attached to the torque box 7 located in front of the first and second crossbars 20, 21, and the tension direction a of the lashing rope 27 locked to the lashing hook 26 is Since the axis b of the first and second crossbars 20 and 21 is substantially coincided with each other, a part of the tensile force acting on the lashing hook 26 is reduced between the torque box 7 and the crossbars 20 and 21 having high rigidity. It is possible to increase the load resistance against the tensile load acting on the lashing hook 26 when the vehicle is transported.

  In the above embodiment, the fixing portions 3a and 3b of the seat 3 are bridged diagonally by the first and second crossbars 20 and 21 and bridged in the vehicle width direction by the brace 22, You may comprise only any one of a 1st, 2nd crossbar or a brace.

  In the above embodiment, the front end portions 20a and 21a of the first and second crossbars 20 and 21 are connected to the left and right torque boxes 7 and the left and right outriggers 8; The side member 5 or the left and right rocker panels 6 may be connected. In short, the left and right vehicle body constituting members 4 straddling the vehicle center line C may be connected.

  Moreover, in the said Example, although the 1st, 2nd crossbar and brace were used as the pipe material, you may form with a flat plate member or a U-shaped plate member.

DESCRIPTION OF SYMBOLS 1 Lower vehicle body 2 Floor member 3 Seat 3a, 3b Front side, rear side fixing part 5 Side member (vehicle body structural member)
6 Rocker panel (body components)
7 Torque box (body component)
8 Outrigger (body component)
20, 21 First and second cross bars (reinforcing members)
22 Brace (Reinforcing member)
20 ′, 21 ′, 22 ′ One side portion 26 lashing hook 27 lashing rope a pulling direction b axis of reinforcing member C vehicle body center line

Claims (2)

A seat is fixed to the upper surface side of the floor member, and vehicle body structural members are disposed on the left and right sides in the vehicle width direction across the vehicle center line on the lower surface side of the floor member, and the left and right vehicle body configurations In the lower body structure of an automobile provided with a reinforcing member that connects the members so as to bridge the members in the vehicle width direction,
A seat mounting member that forms an upper closed section box portion is disposed on the upper surface side of the floor member, and an outrigger that forms a lower closed section box portion is disposed on the lower surface side of the floor member so as to face each other with the floor member interposed therebetween. Is fixed to the vehicle body component,
The reinforcing member is fixed to the vehicle body constituting member such that one side portion in the longitudinal direction bridges a plurality of fixing portions to the floor member of the seat ,
A bulk member that connects the fixing portion and one side portion of the reinforcing member is connected between the seat mounting member and the floor member and between the floor member and the outrigger so as to cross over each other. A lower body structure of an automobile characterized by the above. The lower body structure of an automobile according to claim 1,
Near the end of the other side of the reinforcing member, a lashing hook is attached,
A lower body structure of an automobile, wherein a pulling direction of a lashing rope locked to the lashing hook and an axis of the reinforcing member substantially coincide with each other in plan view of the vehicle.

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