JP2002019643A - Car body floor side part structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide car body floor side part structure of an automobile with high body stiffness and high distributed transmission of a collision load without large change of existing car body structure. SOLUTION: Right and left side sills 20 are joined to both sides of a car body floor 2, a closed cross section-shaped cross member 10 is installed between the side sills 20, rear frames 30 are arranged in parallel in the car body front and rear direction along the side sills 20, the front ends are bumped against the rear surface part 9 of the cross member 10 and joined, and a reinforcement 40 for connecting the front end of the rear frame 30 and the side sill 20 through the rear surface part 9 of the cross member 10 is installed within the cross section of the cross member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile body floor side structure, and more particularly, to an automobile body floor side structure in which a side sill and a rear frame are connected in a biased manner.

[0002]

2. Description of the Related Art In general, a vehicle body floor of an automobile has a rear floor formed at a rear seat mounting portion one step higher than a front floor, and both sides of the front floor and the rear floor are connected to side sills extending in the front-rear direction. The front end of the rear frame is connected to the rear end of the side sill, and the left and right side sills are connected by a cross member near this connection.

However, when the side sill and the rear frame are not connected linearly due to restrictions on the vehicle body layout, the rigidity of the connecting portion is low. This is a factor that affects the smooth transmission of collision load.

On the other hand, as a measure to ensure the rigidity of the joint between the side sill, the rear frame and the cross member, it is disclosed in Japanese Patent Laid-Open Publication No. Hei 7-165124, and FIG. As shown in the perspective view, a vehicle body floor 101 in which a hanging portion 103a formed continuously at a rear edge of a front floor 102 and a front edge of a rear floor 103 is formed.
In a vehicle body floor side structure in which side sill inner 104 of a side sill is fixed to both sides of
4 and the rear frame 106 is attached.
It has been proposed to attach the cross member 107 along a, and to connect the end of the cross member 107 to the side sill inner 104 through the rear frame 106.

[0005]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 7-165.
According to Japanese Patent No. 124, a recess 106a is formed in the rear frame 106 in accordance with the cross-sectional shape of the cross member 107, and the end of the cross member 107 penetrating the recess 106a is connected to the side sill inner 104, and the recess 106a
And the cross member 107, and the rear frame 1
Reference numeral 06 extends forward from the cross member 107 to the front of the vehicle body and is connected to the front floor 102 and the side sill inner 104, thereby securing the rigidity of the connecting portion between the side sill, the rear frame, and the cross member.

However, a recess 106a is formed in the rear frame 106 in accordance with the cross-sectional shape of the cross member 107,
Further, since the rear frame 106 extends forward of the cross member 107 to the vehicle body and is connected to the front floor 106 and the side sill inner 104, it is necessary to significantly change the conventional vehicle body structure, and there is a concern about an increase in manufacturing cost.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention, which has been made in view of the above points, is to provide a vehicle body floor side structure excellent in vehicle body rigidity and dispersion transmission of a collision load without largely changing a conventional vehicle body structure. It is in.

[0008]

According to a first aspect of the present invention, there is provided a vehicle body floor side structure in which left and right side sills are joined to both sides of a vehicle body floor, and a vehicle is provided between the left and right side sills. A vehicle body floor side structure in which a cross member having a closed cross section extending in a width direction is provided and a rear frame extending in a vehicle front-rear direction is provided on a lower surface of the vehicle body floor. Are arranged in parallel in the vehicle longitudinal direction along the side sill, and the front end is abutted and joined to the rear surface of the cross member such that the bottom surface of the rear frame and the lower end of the rear surface substantially match, It is characterized by being joined to the side sill.

According to the first aspect of the present invention, the front end of the rear frame extending in the front-rear direction along the side sill is abutted against the rear surface of the cross member such that the bottom surface of the rear frame and the lower end of the rear surface substantially coincide with each other. And the rear frame is joined to the side sill, so that the rigidity of the connection between the cross member, the rear part of the side sill and the rear frame is secured, and the rigidity of the vehicle body is improved. Stiffness discontinuities along the direction are avoided.

Therefore, when an impact load acts in the front-rear direction, the impact load is efficiently transmitted between the rear frame and the side sill, and can be effectively dispersed throughout the vehicle body. In addition, it is not necessary to significantly change the conventional vehicle body structure, and the rigidity of the vehicle body can be improved without increasing the manufacturing cost.

According to a second aspect of the present invention, a left and right side sill is joined to both sides of a vehicle body floor and extends between the left and right side sills in the vehicle width direction. In a vehicle body side structure in which a cross member having a closed cross-section is provided and a rear frame extending in the vehicle front-rear direction is provided on a lower surface of the vehicle body floor, the vehicle is parallel to the vehicle front-rear direction along the side sill. The rear frame is arranged and the front end is joined to the rear surface of the cross member. The rear frame is disposed in the cross section of the cross member. The front end of the rear frame and the side sill are interposed with the rear surface of the cross member interposed therebetween. And a connecting phosphorus hose.

According to the second aspect of the present invention, the front end of the rear frame extending parallel to the side sill is joined to the rear surface of the cross member, and furthermore, the rear surface of the cross member is provided by the phosphorus hose disposed in the cross section of the cross member. Since the front end of the cross member and the side sill are joined with
The rigidity of the vehicle body is improved by securing the joint rigidity of the joint between the front end of the rear frame, the side sill and the cross member, and discontinuity in rigidity particularly between the side sill and the rear frame is avoided.

Therefore, when an impact load is applied from the front-rear direction, the impact load is efficiently transmitted between the rear frame and the side sill, and can be effectively dispersed throughout the vehicle body. In addition, the structure is simple with the addition of a phosphorus hose, and the rigidity of the vehicle body can be improved without the need to significantly change the conventional vehicle body structure and without increasing the manufacturing cost.

According to a third aspect of the present invention, in the vehicle body floor side structure according to the first or second aspect, a trailing link mounting portion is provided near a front end of the rear frame.

According to the third aspect of the present invention, the mounting rigidity of the trailing link, that is, the mounting rigidity of the rear suspension is improved by arranging the trailing mounting portion near the front end of the rear frame where the rigidity is secured. Improved running stability is provided.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle body floor side structure according to the present invention will be described with reference to the drawings.

(First Embodiment) A first embodiment will be described with reference to FIGS. Although each figure shows the left side of the vehicle body, the right side is also substantially symmetric,
In the figure, the arrow F indicates the forward direction of the vehicle body, UP indicates the upward direction, and OUT indicates the outward direction in the vehicle width direction.

FIG. 1 is a side view of a vehicle body 1 showing a main part of an automobile, FIG. 2 is a sectional view taken along line II of FIG. 1, FIG. 3 is a sectional view taken along line II-II of FIG. FIG. 3 is an exploded perspective view showing a main part.

Reference numeral 2 denotes a vehicle body floor of the vehicle body 1. The vehicle body floor 2 has a front end which extends in the front-rear direction continuously to the lower end of a toe board (not shown) which defines a vehicle compartment and an engine room. And a rear floor 4 continuous with the rear end of the front floor 3. The rear floor 4 has a front end flange 6 formed at a lower end of a hanging portion 6 formed one step higher than the front floor 3 and bent along a front edge of a rear floor portion 5 serving as a rear seat mounting portion.
a is joined to the rear end of the front floor 3.

Reference numeral 7 denotes a cross member forming panel which forms a cross member 10 having a closed cross section extending in the vehicle width direction in cooperation with the rear floor 4. Reference numeral 20 denotes a side sill extending in the front-rear direction along the side of the vehicle body. , 30 are rear frames extending in the front-rear direction along the lower surface of the rear floor portion 5, and 40 is disposed in the cross member 10 and connects the rear floor 4, the cross member forming panel 7, the side sill 20 and the rear frame 30. This is a phosphorus hose and will be described step by step with reference to FIG.

The cross member forming panel 7 has a substantially L-shaped section extending in the vehicle width direction formed by a bottom surface portion 8 and a rear surface portion 9 bent at the rear end of the bottom surface portion 8.
A front end flange 8a overlapping the front end flange 6a formed on the rear floor 4 along the front edge of the rear floor portion 5 and an upper end flange 9a overlapping the lower surface of the rear floor portion 5 along the upper edge of the rear surface portion 9
However, side end flanges 7a are formed at the side ends of the bottom surface portion 8 and the rear surface portion 9 so as to overlap with an inner surface portion 22 of a side sill inner 21 described later.

The side sill 20 includes a side sill inner 21.
And a side sill outer 25, and the side sill inner 21 extends in the front-rear direction formed by an inner surface 22 and an upper surface 23 and a lower surface 24 which are bent outwardly along the upper and lower ends of the inner surface 22, respectively. The upper flange 23a and the lower flange 24a are bent along the ends of the upper surface portion 23 and the lower surface portion 24 in a substantially U-shaped cross section.

On the other hand, the side sill outer 25 is
6 and a substantially U-shaped or C-shaped cross-section extending in the front-rear direction formed by an upper surface portion 27 and a lower surface portion 28 that are bent inward along upper and lower ends of the outer surface portion 26, respectively. An upper flange 27a and a lower flange 28a that respectively overlap the upper flange 23a and the lower flange 24a of the side sill inner 21 are formed along the ends of the portion 27 and the lower surface portion 28, respectively.

The rear frame 30 has a substantially U-shaped cross section which is continuous in the front-rear direction parallel to the side sill inner 21 having a bottom surface portion 31 and an inner surface portion 32 and an outer surface portion 33 bent along both ends of the bottom surface portion 31. An inner upper end flange 32a is formed along the upper end of the inner side surface portion 32 and overlaps the lower surface of the rear floor portion 5, and an outer upper end flange 33a is formed along the upper end of the outer side surface portion 33 and overlaps the upper surface portion 23 of the side sill inner 21. Further, a front end lower flange 31b is formed at the front end of the bottom portion 31 so as to overlap the lower surface of the bottom portion 8 of the cross member forming panel 7, and the front end of the inner side surface portion 32 is abutted against and overlaps the rear surface portion 9 of the cross member forming panel 7. A front end flange 32b is formed.

Near the front end of the rear frame 30, a substantially rectangular bottom portion 36 and a box-shaped trailing link mounting portion 35 formed by bending a side wall 37 around the bottom portion 36 and opening upward are fitted. At the same time, the bottom portion 36 is joined to the bottom portion 31 of the rear frame 30, and the side wall 37 is joined to the inner side surface portion 32 and the outer side surface portion 33. In addition, a nut 38 for mounting and supporting a trailing link (not shown) of the rear suspension is provided on the bottom portion 36.

The lower end of the phosphorus hose 40 extends along the bottom surface 8, the rear surface 9, the lower surface of the rear floor 5 and the inner surface 22 of the side sill inner 21, respectively.
A plate-like base portion 41 having a substantially rectangular shape having a rear end, an upper end, and a front end extending inward from the front end to the rear end.
And the rear end extends along the upper end of the rear surface portion 9 of the cross member forming panel 7 and the outer end extends along the inner end of the upper surface portion 23 of the side sill inner 21. And has a substantially triangular upper surface portion 42 extending therefrom.

At the lower end of the base portion 41, a lower end flange 41a overlapping the bottom surface portion 8 of the cross member forming panel 7 is provided.
The rear end flange 41b overlapping the front end flange 32b formed at the front end has an inner surface portion 22 of the side sill inner 21 at the front end.
The front end flanges 41c which overlap with each other are bent.

A rear upper flange 42a overlapping the upper flange 9a of the cross member forming panel 7 and a side flange 42b overlapping the upper surface 23 of the side sill inner 21 are formed at the rear end and the side end of the upper surface 42, respectively.

For assembling the members thus formed, for example, a box-shaped trailing link mounting portion 35 is connected in advance near the front end of the rear frame 30 and the rear frame 30 is attached to the rear surface 9 of the cross member forming panel 7. Abuts the front end flange 32b formed on the inner side surface portion 32 and joins the front end lower flange 31b to the bottom surface portion 8;
Further, the side wall 37 of the trailing link mounting portion 35 is joined to the rear surface portion 9 to integrate the rear frame 30 and the cross member forming panel 7, and the outer upper end flange 33a formed on the outer surface portion 33 of the rear frame 30 is connected to the side sill inner. 21 and the side end flange 7a of the cross member forming panel 7 is joined to the inner surface 22 of the side sill inner 21 to integrate the rear frame 30, the cross member forming panel 7 and the side sill inner 21. .

The rear upper flange 42a and the side flange 42b formed on the upper surface 42 of the phosphorus hose 40 are joined to the upper flange 9a of the cross member forming panel 7 and the upper surface 23 of the side sill inner 21 respectively.
Flange 41b, the rear surface 9 of the cross member forming panel 7, and the front flange 3 of the rear frame 30
2b, the front end flange 41c and the lower end flange 41a are joined to the inner surface 22 of the side sill inner 21 and the bottom surface 8 of the cross member forming panel 7, respectively, and the phosphorus hose 40 is attached.

Further, the front end flange 6a of the rear floor 4 is overlapped with the front end flange 8a of the cross member forming panel 7, and the rear floor portion 5 is connected to the upper end flange 9a of the cross member forming panel 7 and the inner upper end flange 32a of the rear frame 30.
And the front end flanges 8a and 6a of the cross member forming panel 7 and the rear floor 4 are overlapped on the outer upper end flange 33a.
And the upper end flange 9a and the floor portion 5 are joined to form a cross member 10 having a closed cross section extending in the vehicle width direction by the cross member forming panel 7, the hanging portion 6 of the rear floor 4, and the front portion of the rear floor portion 5. The rear floor portion 5 and the upper end flange 32a of the rear frame 30 which are formed and overlap each other are joined together, and the side sill inner 2
The upper surface portion 23, the outer upper end flange 33a, and the edge of the rear floor portion 5 are joined together.

The upper flange 23a and the lower flange 24a of the side sill inner 21
5, the upper flange 27a and the lower flange 28a are overlapped, and the upper flanges 23a and 27a and the lower flanges 24a and 28a overlapping each other are joined to form the side sill inner 2.
1 and the side sill outer 25 form a side sill 20 having a closed cross-sectional shape extending in the vehicle longitudinal direction.

According to the vehicle body floor side structure thus formed, the front end of the rear frame 30 is connected to the left and right side sills 20 by the cross member forming panel 7 and the front portion of the rear floor 4 so that the cross member has a closed cross section. 1
0 and the rear frame 30 and the side sill 20 are substantially parallel and joined to each other.
The joint rigidity of the joint between the rear end of the side sill 20 and the front end of the rear frame 30 is ensured.

Further, a phosphorus hose 40 is disposed in the cross section of the cross member 10, the lower edge is joined to the bottom surface 8 of the cross member forming panel 7, and the upper edge is the upper surface 22 of the side sill inner 21 and the cross member. The front end of the rear frame 30 and the inner surface 22 of the side sill inner 21 are supported by the base 41 of the phosphorus hose 40, which is supported by the triangular upper surface 42 connected to the upper edge of the rear surface 9 of the forming panel 7 and has sufficient rigidity. By being connected, the joint rigidity of the connecting portion between the side sill 20, the rear frame 30, and the cross member 10 is further secured, and the rigidity of the cross member 10 is secured together with the stiffening of the cross member 10 by the phosphorus hose 40. Discontinuity in rigidity from the side sill 20 to the rear frame 30 is avoided.

Accordingly, when an impact load from the front-rear direction, for example, as shown in FIG. 2, when the impact load P acts on the rear end of the rear frame 30 from the rear, the impact load P is directly applied to the front area of the rear frame 30. While being directly transmitted to the joined side sill 20, it is transmitted to the side sill 20 via the phosphorus hose 40, and is also effectively dispersed and transmitted from the cross member 10 to the left and right side sills 20, so that the side sill 20 and the rear frame 30 Deformation of the joint portion is avoided, and the impact load P can be effectively dispersed throughout the vehicle body.

Further, by arranging the trailing attachment portion 35 at a position near the front end of the rear frame 30 where the rigidity is secured, the attachment rigidity of the trailing link, that is, the attachment rigidity of the rear suspension is improved, and the running stability is improved. Improvements are brought.

Moreover, the relatively simple shape of the phosphorus hose 4
0 is disposed in the cross section of the cross member 10, and the rigidity of the vehicle body can be improved without significantly changing the conventional vehicle body structure without increasing the manufacturing cost.

(Second Embodiment) A second embodiment of the present invention will be described with reference to FIG. FIG. 6 is an exploded perspective view corresponding to FIG. 5 in the first embodiment, and detailed description of the corresponding portions is omitted by attaching the same reference numerals to corresponding portions, and different portions are mainly described. I do.

The phosphorus hose 50 is connected to the bottom 8, the rear 9, and the side sill inner 21 of the cross member forming panel 7.
A plate-shaped base portion 51 is formed in a substantially quadrangular shape having a lower end, a rear end, and a front end extending along the inner surface portion 22 of the vehicle. The base portion 51 shifts inward from the front end to the rear end and is bent at the upper end of the base portion 51. The rear end has a rear surface part 9 of the cross member forming panel 7 and a side end has a substantially triangular upper surface part 52 extending along the inner surface part 22 of the side sill inner 21.

At the lower end of the base 51, a lower end flange 51a overlapping the bottom surface 8 of the cross member forming panel 7 is provided.
A rear end flange 51b overlapping the front end flange 32b formed at the front end has an inner surface portion 22 of the side sill inner 21 at the front end.
The front end flanges 51c are formed by bending, and the cross member forming panels 7 are respectively formed on the rear end and the side end of the upper surface portion 52.
A rear flange 52a overlapping the rear surface 9 and a side flange 52b overlapping the inner surface 22 of the side sill inner 21 are bent.

The lower end flange 51a formed on the base 51 of the phosphorus hose 50 is joined to the bottom surface 8 of the cross member forming panel 7, the rear end flange 51b, the rear surface 9 of the cross member forming panel 7, and the front end flange of the rear frame 30. 3
2b are joined together, the rear end flange 52a formed on the upper surface 52 is joined to the rear surface 9, and the side end flange 51c formed on the base 51 and the side flange 52b formed on the upper surface 52 are side sills. It is joined to the inner surface 22 of the inner 21.

According to the present embodiment, the upper surface 52 is formed between the rear surface 9 of the cross member forming panel 7 and the side sill inner 2.
Since the rear flange 52a and the side flange 52b which are erected so as to fit into the corners of the first inner surface 22 and are bent on the upper surface 52 are joined to the rear surface 9 and the inner surface 22, In addition to the above-described first embodiment, the coupling rigidity of the coupling portion between the cross member 10, the side sill 20, and the rear frame 30 is further improved, the rigidity of the vehicle body is ensured, and the rigidity between the side sill 20 and the rear frame 30 is reduced. Continuity is more reliably avoided, and the impact load from the front-rear direction can be more effectively distributed to the entire vehicle body.

(Third Embodiment) A third embodiment of the present invention will be described with reference to FIG. FIG. 7 is an exploded perspective view corresponding to FIG. 5 in the first embodiment, and detailed description of the corresponding parts is omitted by giving the same reference numerals to the corresponding parts, and different parts are mainly described. I do.

The phosphorus hose 60 in the present embodiment is
A triangular base 61 having a rear end and a side end extending along a rear end and a side end of the bottom portion 8 of the cross member forming panel 7;
The base portion 61 has a substantially rectangular rear surface portion 62 and a side surface portion 63 which are bent at the rear end and the side end and are continuous with each other.

The rear surface portion 62 overlaps with the rear surface portion 9 of the cross member forming panel 7, and its edge overlaps with the front end flange 32 b formed on the inner side surface portion 32 of the rear frame 30 via the rear surface portion 9, and has a side surface portion. 63 is formed so as to overlap the inner side surface 22 of the side sill inner 21.

Then, the base portion 61 and the rear surface portion 62 are joined to the bottom surface portion 8 and the rear surface portion 9 of the cross member forming panel 7, respectively.
Front end flange 32 of the rear frame 30 together with the rear surface 9
b and attached to the cross member forming panel 7, and the side surface 63 is joined to the inner surface 22 of the side sill inner 21.

According to this embodiment, in addition to the first embodiment, the shape of the phosphorus hose 60 can be simplified, and the cross member forming panel 7 can be attached in advance, thereby simplifying the assembling work. Brought.

The present invention can be variously modified without departing from the spirit of the invention, such as by appropriately changing the shape of the phosphorus hose without being limited to the above embodiments.

[0049]

According to the vehicle body floor side structure of the present invention described above, the front end of the rear frame extending in the front-rear direction along the side sill is provided at the rear surface of the cross member and at the rear surface of the rear frame and behind the cross member. The lower ends of the faces are abutted and joined so that they almost coincide with each other, and the rear frame is joined to the side sill, so the rigidity of the connection between the cross member, the rear of the side sill and the rear frame is secured, and the body rigidity is improved. In particular, a discontinuity in rigidity from the side sill to the rear frame is avoided.

The front end of the rear frame extending parallel to the side sill is joined to the rear surface of the cross member, and the rear frame of the rear frame is sandwiched between the rear surface of the cross member by a phosphorus hose disposed in the cross section of the cross member. By joining the front end and the side sill, the joint rigidity of the joint between the front end of the rear frame, the side sill, and the cross member is secured, and the rigidity of the vehicle body is improved. In particular, the discontinuity in rigidity between the side sill and the rear frame is provided. Therefore, when an impact load is applied from the front-rear direction, the impact load is efficiently transmitted between the rear frame and the side sill, and can be effectively dispersed throughout the vehicle body. Moreover, the simple structure of adding the phosphorus hose does not require a significant change in the conventional vehicle body structure, thereby improving the rigidity of the vehicle body.

Further, by arranging the trailing link mounting portion at a position where the rigidity is secured near the front end of the rear frame, the mounting rigidity of the trailing link, that is, the mounting rigidity of the rear suspension is improved, and the running stability is improved. Is brought.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle body showing a main part of a first embodiment of a vehicle body floor side structure according to the present invention.

FIG. 2 is a sectional view taken along line II of FIG.

FIG. 3 is a sectional view taken along line II-II of FIG. 2;

FIG. 4 is an exploded perspective view showing a main part.

FIG. 5 is an enlarged view of a portion A in FIG. 4;

FIG. 6 is an exploded perspective view showing a main part of a second embodiment of the vehicle body floor side structure according to the present invention.

FIG. 7 is an exploded perspective view showing a main part of a third embodiment of the vehicle body floor side structure according to the present invention.

FIG. 8 is a sectional view of a main part showing a conventional vehicle body side structure.

FIG. 9 is a perspective view of a relevant part showing a conventional vehicle body side structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Body floor 4 Rear floor 5 Rear floor part 6 Hanging part 7 Cross member 8 Bottom part 9 Rear part 10 Cross member 20 Side sill 21 Side sill inner 25 Side sill outer 30 Rear frame 35 Trailing attachment part 40 Lin hose 41 Base part 42 Top part 50 Lin hose 51 base 52 top surface 60 phosphorus hose 61 base 62 rear surface 63 side surface

Claims (3)

[Claims] 1. A left and right side sill is joined to both sides of a vehicle body floor, and a cross member having a closed cross section extending in the vehicle width direction is provided between the left and right side sills. A vehicle body floor side structure provided with a rear frame extending in the vehicle direction, wherein the rear frame is disposed in parallel to the vehicle front-rear direction along the side sill, and a front end of the rear frame is provided on a rear surface of the cross member. A vehicle body floor side structure, wherein a bottom surface of a frame and a lower end of the rear surface portion are abutted and joined so as to substantially coincide with each other, and are joined to the side sill. 2. A left and right side sill is joined to both sides of a vehicle body floor, and a cross member having a closed cross section extending in the vehicle width direction is installed between the left and right side sills. A vehicle body side structure provided with a rear frame extending in a direction, wherein the rear frame is arranged parallel to the vehicle front-rear direction along the side sill, and a front end is joined to a rear surface of the cross member; A vehicle body floor side structure comprising: a ring hose disposed in a cross section of a member and connecting a front end of the rear frame and a side sill through a rear surface of the cross member. 3. The vehicle body floor side structure according to claim 1, wherein a trailing link mounting portion is provided near a front end of the rear frame.