JP4878609B2 - Body floor structure - Google Patents

Description

  The present invention relates to a vehicle body floor structure at the rear of a vehicle body provided with a storage recess (floor pan) for storing articles.

2. Description of the Related Art As a vehicle body floor structure, a structure in which a storage recess for storing articles is provided at the rear of a vehicle body and a tow hook for pulling a vehicle is provided below the storage recess.
This type of vehicle body floor structure is designed as appropriate in consideration of running resistance due to running wind while maintaining a predetermined vehicle body rigidity.

As such a vehicle body floor structure, a structure in which an extension floor panel is extended from the floor panel and a traction hook is provided below the extension floor panel is known (for example, see Patent Document 1).
Japanese Patent No. 2815297

  In the vehicle body floor structure of Patent Document 1, the extension floor panel is extended from the floor panel, a reinforcing member is passed between the floor panel and the extension floor panel, and a tow hook bracket is provided on the extension floor panel. A tow hook is attached.

However, in the vehicle body floor structure, since the tow hook bracket is provided so as to protrude from the lower surface of the extension floor panel, there is a problem that the flow of traveling wind under the floor panel is obstructed during traveling and traveling resistance increases. It was.
In the vehicle body floor structure, since the reinforcing member is passed between the floor panel and the extension floor panel, the rigidity strength in the longitudinal direction of the vehicle body is maintained, but the rigidity strength in the vehicle body width direction is not reinforced. Therefore, it cannot be said that the rigidity strength is sufficient with respect to the load input from the tow hook bracket to the extension floor panel.

  The present invention provides a vehicle body floor structure that can reduce the resistance of traveling wind at the lower part of the vehicle body and can maintain sufficient rigidity and strength against the load input from the tow hook bracket to the floor panel. Is an issue.

The invention according to claim 1 is a floor pan formed in a substantially rectangular concave shape, a fuel tank disposed in front of the floor pan, a rear suspension for swingably supporting a rear wheel, and disposed behind the floor pan. In the vehicle body floor structure comprising a rear bumper and an under cover that covers the lower surface of the fuel tank, the lower surface of the under cover, the lower surface of the rear suspension, the lower surface of the floor pan, and the lower surface of the rear bumper are configured by a substantially continuous flat surface. The floor pan extends from the lower surface to the left and right side walls, the front and rear beads extending from the front and rear of the vehicle body to both sides of the center portion of the lower surface, and the upper and lower sides of the left and right side walls bent continuously from the rear of these front and rear beads toward the left and right side walls. A tow hook bracket that has a pair of upper and lower beads extending in the middle of the lower surface of the bead. Characterized in that is provided.

In the invention according to claim 2 , the rear end of the floor pan is formed linearly, the lower end of the rear bumper on the floor pan side is formed linearly, and the gap between the rear end of the floor pan and the lower end of the rear bumper on the floor pan side Is characterized by having a constant interval over the vehicle width direction.

In the invention according to claim 1 , when the fuel tank is provided with an under cover that covers the lower surface, the lower surface of the under cover, the lower surface of the rear suspension, the lower surface of the floor pan, and the lower surface of the rear bumper are configured by a substantially continuous flat surface. Therefore, the resistance of the traveling wind at the lower part of the vehicle body can be reduced. Thereby, the obstacle by a driving | running | working wind decreases and it can aim at the improvement of the fuel consumption rate (fuel consumption) of a vehicle.

Further, the floor pan is bent from the lower surface to the left and right side walls, the front and rear beads extending from the front and rear of the vehicle body on both sides of the center portion of the lower surface, and the left and right side walls are bent continuously from the rear part of these front and rear beads to the left and right side walls. Since it has a pair of beads consisting of an upper and lower bead extending vertically , for example, it is possible to prevent the opening of the floor pan from opening without adding a cross member and to reinforce the rear part of the floor pan. . Thereby, the floor pan can endure the load input from the tow hook bracket.
Further, since the traction hook bracket is provided in accordance with the height of the lower surface of the bead, the running resistance due to the provision of the traction hook bracket can be minimized.

In the invention according to claim 2 , since the gap between the rear end of the floor pan and the lower end of the rear bumper on the floor pan side is made constant in the vehicle width direction, the swirling phenomenon of traveling wind is reduced when the gap is not uniform. can do. Thereby, driving resistance can be reduced and fuel consumption can be improved.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals. In the figure, Fr indicates the front of the vehicle body, and Rr indicates the rear of the vehicle body.
1 is a perspective view showing a main part of a vehicle body floor structure according to the present invention, FIG. 2 is a bottom view of the vehicle body floor structure according to the present invention, and FIG. 3 is a side view of the vehicle body floor structure shown in FIG. It is sectional drawing.

  As shown in FIGS. 1 to 3, the vehicle body floor structure includes left and right rear frames 12, 12 that extend in the vehicle front-rear direction, and a floor panel (between these rear frames 12, 12). A vehicle body floor) 13, a storage recess (floor pan) 14 for storing articles formed in a substantially rectangular recess shape, and a fuel disposed at the lower part of the floor panel and in front of the storage recess. A tank 21 (see FIG. 2), a rear suspension 23 that is swingably attached to the front and lower portions of the left and right rear frames 12 and 12 and supports a rear wheel (not shown) so as to be swingable, and a storage recess 14 The rear bumper 24 is arranged rearward.

  As shown in FIG. 1, a hybrid vehicle power supply device 15 is stored in the bottom 14 a of the storage recess 14, and a spare tire 17 is stored on the hybrid vehicle power supply device 15 via a holding arm 16. . That is, the hybrid vehicle power supply device 15 and the spare tire 17 are articles stored in the storage recess 14.

  As shown in FIG. 3, the vehicle body floor structure has a flat surface in which the lower surface 21a of the fuel tank 21, the lower surface (lower end) 23a of the rear suspension 23, the lower surface 95 of the floor pan 14, and the lower surface 24a of the rear bumper 24 are substantially continuous. Consists of.

4 is a perspective view seen from the bottom surface of the vehicle body floor structure shown in FIG. 2, and FIG. 5 is a perspective view seen from the bottom rear side of the vehicle body floor structure shown in FIG.
The storage recess (floor pan) 14 includes a main body portion 91 joined to the left and right rear frames 12, a tow hook bracket 92 provided in the center of the main body portion 91 along the longitudinal direction of the vehicle body, and the tow hook. It comprises a tow hook 93 provided at the rear part of the bracket 92.
The rear end 94 of the storage recess (floor pan) 14 is formed in a straight line when viewed from the bottom (plan view).

  The main body portion 91 extends from the lower surface 95 of the floor pan 14 to the left and right side walls 96, 96, extends to the front and rear of the vehicle body on both sides of the central portion of the lower surface 95, and bends toward the left and right side walls 96, 96 at the rear. A pair of beads 97, 97 extending up and down the side walls 96, 96 are formed.

The beads 97, 97 are composed of front and rear beads 98, 98 extending in the longitudinal direction of the vehicle body and upper and lower beads 99, 99 extending in the vertical direction of the vehicle body.
The lower surface 92a of the tow hook bracket 92 is formed according to the height of the lower surfaces 97a and 97a of the beads 97 and 97, as shown in FIG.

  In the vehicle body floor structure, a pair of beads 97, 97 extending in the longitudinal direction of the vehicle body on both sides of the center portion of the lower surface 95 of the floor pan 14 are bent at the rear portion of the floor pan 14 and extended above and below the left and right side walls 96, 96. For example, the opening of the floor pan 14 can be prevented from opening without adding a cross member, and the rear portion of the floor pan 14 can be reinforced. Thereby, the floor pan 14 can withstand the load input from the tow hook bracket 92.

  Further, since the tow hook bracket 92 is provided in accordance with the height of the lower surfaces 97a, 97a of the beads 97, 97, the running resistance due to the provision of the tow hook bracket 92 can be minimized.

  As shown in FIG. 3, the vehicle body floor structure swings a floor pan 14 formed into a substantially square concave shape, a fuel tank 21 disposed in front of the floor pan 14, and a rear wheel (not shown). The rear suspension 23 is supported freely, and the rear bumper 24 is disposed behind the floor pan 14.

  Since the lower surface 21a of the fuel tank 21, the lower surface 23a of the rear suspension 23, the lower surface 95 of the floor pan 14, and the lower surface 24a of the rear bumper 24 are constituted by a substantially continuous flat surface, the resistance of traveling wind at the lower part of the vehicle body is reduced. be able to. Thereby, the obstacle by a driving | running | working wind decreases and it can aim at the improvement of the fuel consumption rate (fuel consumption) of a vehicle.

FIG. 6 is a side sectional view of the vehicle body floor structure of the second embodiment according to the present invention.
As shown in FIG. 6, the vehicle body floor structure of the second embodiment includes left and right rear frames 12, 12, a floor panel (vehicle body floor) 13, a storage recess (floor pan) 14, a fuel tank 21, The fuel tank 21 includes an under cover 102 that covers the lower surface 21 a, a rear suspension 23, and a rear bumper 24.

  In the vehicle body floor structure of the second embodiment, when the fuel tank 21 is provided with an under cover 102 that covers the lower surface 21 a, the lower surface 102 a of the under cover 102, the lower surface 23 a of the rear suspension 23, and the lower surface 95 of the storage recess (floor pan) 14. And the lower surface 24a of the rear bumper 24 is constituted by a substantially continuous flat surface.

  In the vehicle body floor structure of the second embodiment, when the fuel tank 21 is provided with an under cover that covers the lower surface 21a, the lower surface 102a of the under cover, the lower surface 23a of the rear suspension 23, the lower surface 95 of the floor pan 14, and the lower surface 24a of the rear bumper 24. However, since it is composed of a substantially continuous flat surface, it is possible to reduce the resistance of the traveling wind at the lower part of the vehicle body. Thereby, the obstacle by a driving | running | working wind decreases and it can aim at the improvement of the fuel consumption rate (fuel consumption) of a vehicle.

FIG. 7 is a perspective view seen from the bottom of the vehicle body floor structure of the third embodiment according to the present invention.
The vehicle body floor structure of the third embodiment includes left and right rear frames 12, 12, a floor panel (vehicle body floor) 13, a storage recess (floor pan) 14, a fuel tank 21 (see FIG. 2), a rear suspension 23, And the rear bumper 114.

  The rear bumper 114 has a floor pan side lower end 115 formed in a straight line, and a gap with the rear end 94 on the floor pan 14 side is formed at a constant interval S1 in the vehicle width direction.

  In the vehicle body floor structure of the third embodiment, the gap between the rear end of the floor pan 14 and the floor pan side lower end 115 of the rear bumper 114 is set to a constant interval S1 in the vehicle width direction. The swirling phenomenon of the traveling wind can be reduced. Thereby, driving resistance can be reduced and fuel consumption can be improved.

  In the vehicle body floor structure according to the present invention, as shown in FIG. Although the pair of beads 97 and 97 are bent toward the left and right side walls 96 and 96 and extend up and down the left and right side walls 96 and 96, the present invention is not limited to this. It may be bent toward the upper and lower sides of the left and right side walls 96, 96.

  The vehicle body floor structure according to the present invention is suitable for use in passenger cars such as sedans and wagons.

It is a perspective view which shows the principal part of the vehicle body floor structure which concerns on this invention. It is a bottom view of the vehicle body floor structure according to the present invention. FIG. 3 is a side sectional view of the vehicle body floor structure shown in FIG. 2. It is the perspective view seen from the bottom face of the vehicle body floor structure shown by FIG. FIG. 3 is a perspective view of the vehicle body floor structure shown in FIG. It is side surface sectional drawing of the vehicle body floor structure of 2nd Example which concerns on this invention. It is the perspective view seen from the bottom face of the vehicle body floor structure of 3rd Example which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 14 ... Floor pan (accommodation recessed part), 21 ... Fuel tank, 21a ... Lower surface, 23 ... Rear suspension, 23a ... Lower surface, 24 ... Rear bumper, 24a ... Lower surface, 92 ... Traction hook bracket, 96 ... Side wall, 97 ... Bead, 97a ... lower surface, 102 ... under cover, 102a ... lower surface, 114 ... rear bumper, 115 ... floor pan side lower end.

Claims (2)

A floor pan formed in a substantially rectangular concave shape, a fuel tank disposed in front of the floor pan, a rear suspension for swingably supporting the rear wheel, a rear bumper disposed in the rear of the floor pan, and the fuel tank In the vehicle body floor structure including an under cover that covers the lower surface,
The lower surface of the under cover, the lower surface of the rear suspension, the lower surface of the floor pan, and the lower surface of the rear bumper are constituted by a substantially continuous flat surface ,
The floor pan extends from the lower surface to the left and right side walls, the front and rear beads extending from the front and rear of the vehicle body to both sides of the central portion of the lower surface, and the left and right side walls bent continuously from the rear portion of the front and rear beads toward the left and right side walls. A pair of upper and lower beads extending up and down,
A vehicle body floor structure , wherein a tow hook bracket adapted to the height of the lower surface of the bead is provided at the center of the lower surface . The rear end of the floor pan is formed in a straight line, the lower end of the rear bumper on the floor pan side is formed in a straight line, and a gap is formed between the rear end of the floor pan and the lower end of the rear bumper on the floor pan side. vehicle body floor structure of claim 1 Symbol mounting, characterized in that the predetermined intervals across the width direction.

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