WO2011114762A1

WO2011114762A1 - Floor structure for vehicle

Info

Publication number: WO2011114762A1
Application number: PCT/JP2011/050327
Authority: WO
Inventors: 祐介浅田
Original assignee: トヨタ車体株式会社
Priority date: 2010-03-16
Filing date: 2011-01-12
Publication date: 2011-09-22
Also published as: JP2011189881A

Abstract

The disclosed floor structure for a vehicle allows for a lower vehicle floor while maintaining flatness thereof and minimizing weakening of the vehicle body resulting from said floor-lowering. In the disclosed floor structure for a vehicle, a side member (12) is connected to the bottom surface of a floor panel of the vehicle, and is provided with a standard height part (120) in which the projection dimensions thereof from the bottom surface of the floor panel are set to a specific value, and a reduced height part (122) in which the projection dimensions thereof are set to be less than the standard height part (120). A component (36) of a rear suspension (30) is disposed underneath the reduced height part (122) of the side member (12). Additionally, on the side member (12), at least the reduced height part (122) and the area extending from the reduced height part (122) to a position (41s) at which a support bracket (41) of a component (34) of the rear suspension (30) is connected to the standard height part (120) of the side member (12), are reinforced by means of a reinforcing member (140).

Description

Vehicle floor structure

The present invention relates to a vehicle floor structure in which a load applied to a vehicle body from a rear wheel via a rear suspension can be received by a side member extending in the vehicle front-rear direction.

A technique related to the vehicle floor structure described above is described in Patent Document 1.
In the vehicle described in Patent Document 1, as shown in FIG. 7, left and right side members 103 extending in the vehicle front-rear direction are provided below the floor of the body 101, and a plurality of side members 103 extending in the vehicle width direction between these side members 103 are provided. A book cross member 105 is provided. A rear suspension 106 that supports the rear wheel 107 is disposed below the side member 103 and the cross member 105.
As a result, the load applied to the vehicle body 101 from the rear wheel 107 via the rear suspension 106 is received by the side member 103, the cross member 105, and the like.

JP 2009-298334 A

In recent years, there has been an increasing demand for flattening and lowering the vehicle floor F in consideration of expansion of indoor space, lowering the center of gravity, and loadability of luggage. However, as described above, the side member 103 and the cross member 105 are provided under the floor of the vehicle, and the rear suspension 106 is further provided below the side member 103 and the cross member 105. For this reason, there is a limit to flattening and lowering the vehicle floor F in a state where the necessary heights of the side member 103 and the rear suspension 106 are secured.

The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that the vehicle floor can be lowered in a flat state, and the vehicle body by lowering the floor It is to be able to suppress the strength reduction.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is a vehicle floor structure in which a load applied to a vehicle body from a rear wheel via a rear suspension is received by a side member extending in the vehicle front-rear direction, wherein the side member is a floor of the vehicle. A standard height portion in which the protrusion dimension from the bottom surface of the floor panel is set to a predetermined value, and a height reduction in which the protrusion dimension is set to be smaller than the standard height portion. And the rear suspension component is disposed below the side member height reduction portion, and the side member includes at least the height reduction portion and the height reduction portion thereof. The range from the part to the part where the support bracket of the rear suspension component is connected to the standard height part of the side member is reinforced by the reinforcing member And wherein the door.

According to the present invention, the side member is provided with a standard height portion in which the projecting dimension from the lower surface of the floor panel is set to a predetermined value, and a height reducing portion in which the projecting dimension is smaller than the standard height portion. It has been. For this reason, the lower end surface of a side member becomes the highest in the position of a height reduction part. The components of the rear suspension are arranged below the side member height reduction portion.
For this reason, even if the floor panel of the vehicle is lowered by an amount corresponding to the height of the lower end surface of the side member at the position of the height reduction portion, the rear suspension can be mounted at the conventional height position. That is, the floor panel of the vehicle can be lowered by an amount corresponding to the reduction in the protruding dimension of the height reduction portion with respect to the standard height portion of the side member.
Further, the side member has at least a height reducing portion and a range from the height reducing portion to a portion where the support bracket of the component component of the rear suspension is connected to the standard height portion of the side member by the reinforcing member. Has been. For this reason, even if a height reducing portion is provided on the side member as a measure for lowering the floor, a reduction in the strength of the side member at the position of the height reducing portion or the like can be suppressed.

According to the invention of claim 2, the reinforcing member is formed in a lid plate shape joined to the side member from the upper side of the floor panel.
For this reason, even after the side member is joined to the floor panel, the side member can be easily reinforced.
According to the invention of claim 3, the reinforcing member is arranged along a guide rail that guides the seat so as to be slidable back and forth, and is configured to be lower than the guide rail.
For this reason, the reinforcing member does not stand out on the vehicle floor, and the reinforcing member does not interfere with the front-rear slide of the seat.

According to the invention of claim 4, the reinforcing member is made of high-tensile steel.
For this reason, even if the reinforcing member is thin, a predetermined strength can be secured and the reinforcing member can be reduced in weight.

According to the present invention, the vehicle floor can be lowered in a flat state. Furthermore, the strength reduction of the vehicle body due to the lower floor can be suppressed.

It is a model side view of a vehicle provided with the floor part structure which concerns on Embodiment 1 of this invention. FIG. 2 is a rear perspective view of a vehicle including the floor structure. It is a whole side view showing the floor part structure concerning Embodiment 1 of the present invention. It is a whole top view showing the said floor part structure. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4. It is VI-VI arrow sectional drawing of FIG. It is a longitudinal cross-sectional view showing the conventional floor part structure.

[Embodiment 1]
Hereinafter, the vehicle floor structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.
In the drawing, front and rear, right and left, and up and down correspond to front and rear, left and right, and top and bottom of the vehicle.

<About vehicle overview>
The vehicle according to this embodiment is a one-box type passenger car C as shown in FIG. Under the floor of the body Cb of the passenger car C, side members 12 extending in the vehicle front-rear direction are provided at positions on both sides in the vehicle width direction (left-right direction). Further, between the left and right side members 12, a plurality of cross-beam-like cross members 14 (see FIG. 4) that connect the left and right side members 12 are provided in the vehicle front-rear direction. Further, below the floor of the body Cb of the passenger car C, left and right front suspensions (not shown) that support the front wheels 2f and left and right rear suspensions 30 that support the rear wheels 2b are provided. Here, on the extension line of the cross member 14 at the position of the rear suspension 30, as shown in FIG. 6, an outrigger 16 that projects outward in the vehicle width direction is provided. In FIG. 4, the outrigger 16 is omitted.
In the rear compartment 4 of the passenger car C, as shown in FIG. 2, two sets of left and right guide rails 22 for guiding the seat 6 to be slidable back and forth are provided at the position of the floor F. Here, the left end guide rail 22 and the right end guide rail 22 are provided along the left and right side members 12 as described later (see FIG. 5).

<About rear suspension 30>
The rear suspension 30 is a device that reduces the impact transmitted from the road surface to the body Cb of the passenger car C via the rear wheel 2b. As shown in FIGS. 3 and 4, the rear suspension 30 includes a suspension arm 31, an intermediate beam 32, a bush 34, a coil spring 36, and a shock absorber 37.
The suspension arm 31 is an arm that supports the rear wheel 2b. As shown in FIGS. 3 and 4, a rear wheel support bracket 31b including an axle 31j is provided at the rear portion of the suspension arm 31. Further, at the rear part of the suspension arm 31, there is formed an absorber receiving part 31a for receiving the lower end part of the shock absorber 37 in a vertically rotatable state at a position on the inner side in the vehicle width direction from the rear wheel support bracket 31b. Note that the upper end portion of the shock absorber 37 is connected to an upper absorber receiving portion (not shown) provided at the rear portion of the body Cb.

A spring receiving portion 31x that receives the lower end portion of the coil spring 36 is formed at the center portion of the suspension arm 31 so as to protrude inward in the vehicle width direction in a shelf shape. Here, the spring receiving portion 31x of the suspension arm 31 is disposed immediately below the side member 12, as shown in FIG. A coil spring 36 is installed vertically between the spring receiving portion 31x of the suspension arm 31 and the upper receiving portion 12x of the lower surface 122d of the side member 12.
Further, an intermediate beam 32 is stretched between the suspension arms 31 on both sides (left and right) in the vehicle width direction, and an end portion of the intermediate beam 32 is connected to a side surface on the front side of the spring receiving portion 31x of the suspension arm 31. ing.
Further, the front end portion of the suspension arm 31 is pivotable up and down via the bush 34, and the support bracket 45 of the outrigger 16 (see FIG. 6) and the support bracket 41 of the side member 12 (see FIGS. 3 and 4). And a support bracket 43 (see FIG. 6) of the cross member 14.

The bush 34 is a member for connecting the suspension arm 31 to the outrigger 16, the side member 12, and the cross member 14 in a state in which the suspension arm 31 can be rotated up and down, and as shown in FIG. It is comprised from the substantially cylindrical rubber member 34s provided so that the axis | shaft 34j might be enclosed. Then, one end (outer end in the vehicle width direction) of the connecting shaft 34j of the bush 34 is supported by the support bracket 45 (outer bracket 45y) of the outrigger 16 and the support bracket 41 of the side member 12, as shown in FIGS. Has been. Further, the other end (the inner end in the vehicle width direction) of the connecting shaft 34j of the bush 34 is supported by a support bracket 45 (inner bracket 45x) of the outrigger 16 and a support bracket 43 of the cross member 14, as shown in FIG. ing. The rubber member 34 s of the bush 34 is fitted into a bearing portion 31 w provided at the front end portion of the suspension arm 31.

As shown in FIG. 6, the support bracket 45 (outer bracket 45 y) of the outrigger 16 has a lateral flange portion 45 f formed at the upper end, and the lateral flange portion 45 f is fixed to the lower surface 16 d of the outrigger 16. Further, the inner bracket 45x is formed with a vertical flange portion 45u at the upper end, and the vertical flange portion 45u is fixed to the outer surface of the side member 12. And the vertical flange 16f formed in the edge part of the outrigger 16 is being fixed to the outer surface of the inner side bracket 45x.
As shown in FIGS. 3 and 4, the support bracket 41 of the side member 12 includes a flange portion 41 s that is fixed to the outer surface of the side member 12, and a support portion 41 u that supports one end of the connecting shaft 34 j of the bush 34. The connecting plate portion 41c that connects the flange portion 41s and the support portion 41u.
Further, as shown in FIG. 6, the support bracket 43 of the cross member 14 includes a fixing portion 43 s fixed to the lower surface of the cross member 14, a support portion 43 u that supports the other end of the connecting shaft 34 j of the bush 34, The fixing portion 43s and the supporting portion 43u are configured by a reinforcing portion 43r that reinforces the rib portion.
With the above configuration, the impact transmitted from the rear wheel 2b to the suspension arm 31 is relaxed by the rubber member 34s of the bush 34, transmitted to the outrigger 16, the side member 12, and the cross member 14, and further relaxed by the coil spring 36 and the like. To the side member 12 and the like.

<About the structure of the side member 12>
As shown in FIGS. 5 and 6, the side member 12 is formed in a groove shape having an open upper surface by bending a steel plate into a substantially U-shaped cross section, and flange portions 12f are formed on both sides of the upper surface opening portion. Is formed. And the flange part 12f of the side member 12 is joined to the lower surface of the floor panel 10 which comprises the floor F of the body Cb by welding etc., for example.

The side member 12 has a standard height portion 120 in which the projecting dimension from the lower surface of the floor panel 10 is set to a predetermined value (H0), and a height in which the projecting dimension is set smaller than the standard height portion 120. It is comprised from the reduction | decrease part 122 (projection dimension H1). As shown in FIG. 3, the height reducing portion 122 of the side member 12 is provided at approximately the same position as the suspension arm 31 of the rear suspension 30 in the vehicle longitudinal direction. Further, the above-described upper receiving portion 12x that supports the upper end of the coil spring 36 is formed on the lower surface 122d of the height reducing portion 122 of the side member 12 at a position directly above the spring receiving portion 31x of the suspension arm 31.
That is, by providing the upper receiving portion 12x of the coil spring 36 on the lower surface 122d of the height reducing portion 122 of the side member 12, the side member 12 is maintained in the state where the height position of the rear suspension 30 is maintained at the same height as the conventional one. The position of the floor panel 10 can be lowered by the height difference (H0−H1) between the height reduction portion 122 and the standard height portion 120.
The flange portion 41s of the support bracket 41 that supports the bush 34 is fixed to the outer surface of the standard height portion 120 of the side member 12, as shown in FIG.

<Reinforcing structure of side member 12>
As shown in FIG. 3, the side member 12 has a reinforcing member 140 on the upper side of the floor panel 10 from the front side of the portion where the flange portion 41s of the support bracket 41 is fixed to the rear side of the height reducing portion 122 (FIG. 6). For example, it is joined by welding or the like.
The reinforcing member 140 is a cover plate-like member that reinforces the height reducing portion 122 of the side member 12 and its periphery, and is formed in a substantially trapezoidal cross section as shown in FIGS. A flange portion 143 is provided. The left and right flange portions 143 of the reinforcing member 140 are configured to overlap the left and right flange portions 12 f of the side member 12. A groove-like recess 145 extending in the longitudinal direction is formed in the center of the reinforcing member 140. Thereby, the bending strength in the longitudinal direction of the reinforcing member 140 is increased.
As described above, since the side member 12 is provided along the guide rail 22 of the seat 6 as shown in FIG. 5, the reinforcing member 140 is adjacent to the guide rail 22 along the guide rail 22. It becomes fixed. Further, the height of the reinforcing member 140 is set so as to be lower than the guide rail 22.
The reinforcing member 140 is made of, for example, high tensile steel.

<Other configurations>
As shown in FIG. 5, the upper surface of the floor panel 10 is covered with a floor mat Fm having a thickness dimension substantially the same as the height dimension of the reinforcing member 140. The reinforcing member 140 and the floor mat Fm are covered with a carpet Fc, and the carpet Fc is covered with a decorative article mat Fy. The surface of the product mat Fy becomes the floor F of the passenger compartment 4. For this reason, the reinforcing member 140 does not protrude from the floor F.

<Advantages of the vehicle floor structure according to this embodiment>
According to the floor structure of the vehicle according to the present embodiment, the side member 12 has a standard height portion 120 in which the protruding dimension from the lower surface of the floor panel 10 is set to a predetermined value (H0), and the standard height portion. A height reducing portion 122 having a projecting dimension smaller than 120 is provided. For this reason, the lower end surface of the side member 12 is highest at the position of the height reducing portion 122. A component (coil spring 36) of the rear suspension 30 is disposed below the height reducing portion 122 of the side member 12.
For this reason, even if the vehicle floor panel 10 is lowered by an amount corresponding to the rise of the lower end surface of the side member 12 at the position of the height reducing portion 122, the rear suspension 30 can be mounted at the conventional height position. That is, the floor panel 10 of the vehicle can be lowered by an amount corresponding to the projecting dimension reduction (H0-H1) of the height reduction portion 122 with respect to the standard height portion 120 of the side member 12.
Further, at least the height reducing portion 122 and the support bracket 41 of the component (bush 34) of the rear suspension 30 are connected to the side member 12 from the height reducing portion 122 to the standard height portion 120 of the side member 12. The reinforcing member 140 is joined in a lid plate shape from the top of the floor panel 10 in a range up to the portion to be formed. For this reason, even if the side member 12 is provided with the height reducing portion 122 as a countermeasure for lowering the floor, the strength of the side member 12 does not decrease due to the position of the height reducing portion 122 or the like.

Further, the reinforcing member 140 is disposed along the guide rails 22 that guide the seat 6 so as to be slidable back and forth, and is configured to be lower than the guide rails 22. For this reason, the reinforcing member 140 does not stand out on the floor F, and the reinforcing member 140 does not interfere with the forward / backward sliding of the seat 6.
Further, since the reinforcing member 140 is made of high-tensile steel, a predetermined strength can be ensured even if the reinforcing member 140 is thin. Therefore, the weight of the reinforcing member 140 can be reduced, and the center of gravity of the portion formed by the side member 12 and the reinforcing member 140 can be made as low as possible.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the floor structure of the vehicle according to the present embodiment, the example in which the reinforcing member 140 is formed in a substantially trapezoidal cross section has been shown, but the reinforcing member 140 may be formed in a mountain shape in cross section or formed in a flat inverted U shape in cross section. It is also possible to do. Furthermore, the reinforcing member 140 can be formed in a flat rectangular tube shape.
Moreover, in this embodiment, the example which forms the reinforcement member 140 in the lid plate shape joined to the flange part 12f of the side member 12 from the upper side of the floor panel 10 was shown. However, the reinforcing member 140 can be formed in a partition plate shape in the internal space of the side member 12.
Moreover, although the example which uses high-strength steel as a material of the reinforcement member 140 was shown, when using the reinforcement member 140 as a partition plate of the internal space of the side member 12, materials other than high-tensile steel are used, for example. It is also possible to do.

2b ··· rear wheel 6 ··· seat 10 ··· floor panel 12 ··· side member 120 · · · standard height portion 122 · · · height reduction portion 22 ··· guide Rail 30 ... Rear suspension 31 ... Suspension arm 34 ... Bush 36 ... Coil spring 37 ... Shock absorber 41 ... Support bracket 41s ... Flange 140 ..Reinforcing members F ... Floor

Claims

A floor structure of a vehicle configured to receive a load applied to a vehicle body from a rear wheel via a rear suspension by a side member extending in a vehicle longitudinal direction,
The side member is configured to be joined to a lower surface of the floor panel of the vehicle, and a standard height portion in which a projecting dimension from the lower surface of the floor panel is set to a predetermined value, and the projecting dimension from the standard height portion. Is equipped with a height reduction part that is set small,
The components of the rear suspension are disposed below the height reducing portion of the side member,
Further, the side member has at least the height reducing portion and a range from the height reducing portion to a portion where a support bracket of a component of the rear suspension is connected to a standard height portion of the side member. A vehicle floor structure characterized by being reinforced by the above.
The vehicle floor structure according to claim 1,
The vehicle floor structure according to claim 1, wherein the reinforcing member is formed in a lid plate shape that is joined to the side member from above the floor panel.
The vehicle floor structure according to claim 2,
The vehicle floor structure, wherein the reinforcing member is disposed along a guide rail that guides a vehicle seat so as to be slidable back and forth, and is configured to be lower than the guide rail.
The vehicle floor structure according to any one of claims 1 to 3,
The floor structure of a vehicle, wherein the reinforcing member is made of high-tensile steel.