JPH08142916A - Rear floor structure for automobile - Google Patents

Abstract

PURPOSE: To show rigidity high in structure to input from a shock absorber. CONSTITUTION: A cross member 11 is erected in a condition, where both its end parts 13 are extended outward than a rear side member 1, between rear side members 8; and a right and left two-piece type rear floor 19, having a wheel house inner part 9 to be connected to both the end parts 13 respectively, is fitted in a condition, where respective mating divided end parts 24 and 25 are overlapped, on a skeleton member composed of the rear side member 1 and the cross member 11 to fix the shock absorber of a rear suspension to both the end parts 13 of the cross member 11. Input applied to the shock absorber can be surely received by the whole cross member 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile rear floor structure.

[0002]

2. Description of the Related Art As a conventional rear floor structure of an automobile, for example, those shown in FIGS. 6 to 8 are known (see Japanese Utility Model Laid-Open No. 3-44079).

Reference numeral 1 is a rear side member, and a pair of left and right members are arranged along the front-rear direction. A cross member 3 extending in the vehicle width direction is provided between the portions of the rear side member 1 corresponding to the wheel house inner 2. And
A rear floor 4 is mounted on a frame member composed of the rear side member 1 and the cross member 3.

The lower end of the wheel house inner 2 is connected to each outer end of the rear floor 4, and the upper end of the wheel house inner 2 is connected to the side panel 5. A reinforcement 6 for maintaining the rigidity of the wheel house inner 2 is connected to the wheel house inner 2 from the outside. The upper end of the reinforcement 6 is connected to the wheel house outer 5a below the side panel 5, and the lower end thereof is connected to the rear side member 1.

7 is a shock absorber (see FIG. 7)
Then, it is attached to the reinforcement 6. The input F from the suspension member applied from the shock absorber 7 is transmitted from the reinforcement 6 to the cross member 3 via the rear side member 1 and received there. That is, since the rear side member 1 along the front-rear direction is twisted by the input F and it is difficult to obtain sufficient rigidity, the input F from the reinforcement 6 finally passes through the rear side member 1 and finally cross member 3 along the vehicle width direction. It is transmitted to and is received there.

In the rear floor structure having the above structure, as shown in FIG. 8, the wheel house inner 2 and the reinforcement 6 are assembled on the side panel 5 side in advance, and the rear side member 1 and the rear floor corresponding to them are respectively assembled. 4 is connected from the outside to assemble the whole.

[0007]

However, in such a conventional technique, since the structure is as described above, the reinforcement 6 to which the input F from the shock absorber 7 is directly applied, and the reinforcement. The cross member 3 for finally receiving the input F from the force 6,
It is an "indirect" connection via the rear side member 1. Therefore, the shock absorber 7 is likely to fall inward from the lower end due to the input F, and it is difficult to obtain rigidity for the input F. Therefore, conventionally, in order to reliably transmit the input F applied to the reinforcement 6 to the cross member 3, it is necessary to solidify the vicinity of the lower end of the reinforcement 6 with various reinforcing materials, which causes an increase in the number of parts and the weight of the vehicle body. There is.

The present invention has been made by paying attention to such a conventional technique, and provides a rear floor structure of an automobile capable of structurally exhibiting high rigidity with respect to an input from a shock absorber. .

[0009]

According to the first aspect of the present invention,
A cross member continuously formed along the vehicle width direction is provided between a pair of left and right rear side members along the front-rear direction with both ends thereof extending outward from the rear side member. The left and right split rear floors having wheel house inners connected to both ends of the cross member are mounted on the skeleton member consisting of, with the split end portions of the left and right rear floors overlapping each other. The rear suspension shock absorbers are attached to both ends. Here, “inside” means the center side of both rear side members in the vehicle width direction, and “outside” means the opposite side.

According to a second aspect of the present invention, a closed cross-section portion which is continuous in the front-rear direction is formed by the divided end portions which are overlapped with each other.

According to the third aspect of the present invention, the lateral link bracket is attached to the cross member, and the lateral link bracket is supported by the reinforcement attached to the closed cross section of the rear floor.

According to the fourth aspect of the present invention, the reinforcing patch for attaching the seat belt anchor is attached to the closed cross section of the rear floor.

According to the fifth aspect of the invention, the tow hook is attached to the closed cross section of the rear floor via the bracket.

According to the sixth aspect of the present invention, the cross member is attached to the rear side member via the superposed reinforcing member.

According to a seventh aspect of the present invention, the wheel house inner is integrally press-molded on each of the left and right divided rear floors.

[0016]

According to the invention described in claim 1, since the cross member is continuously formed along the vehicle width direction, and both ends thereof are connected to the wheel house inner at positions outside the rear side member, respectively. The input applied from the shock absorber to both ends of the cross member is received by the entire cross member as it is, and high rigidity is shown against the input.

In addition, the rear floor is divided into two parts on the left and right sides, and with the divided ends thereof being overlapped with each other,
Since it is mounted on the skeleton member composed of the rear side member and the cross member, the size of the rear floor in the vehicle width direction can be finely adjusted depending on the overlapping condition of the divided end portions. Therefore, it is possible to always connect the wheel house inner to both ends of the cross member in a reliable state.

According to the second aspect of the present invention, since the closed cross-section portion that is continuous in the front-rear direction is formed by the divided end portions that are overlapped with each other, the rigidity of the rear floor is increased.

According to the third aspect of the present invention, since the lateral link bracket mounted on the cross member is supported by the reinforcement mounted on the closed cross section of the rear floor, the mounting strength of the lateral link bracket is increased. , The suspension performance is improved.

According to the fourth aspect of the present invention, since the reinforcing patch for attaching the seat belt anchor is attached to the closed cross section of the rear floor, the attachment strength of the seat belt anchor is increased, and the occupant restraint performance by the seat belt is improved. improves.

According to the fifth aspect of the invention, since the tow hook is attached to the closed cross section of the rear floor via the bracket, the attachment strength of the tow hook is increased and the tow performance by the tow hook is improved. .

According to the sixth aspect of the present invention, since the cross member is attached to the rear side member through the reinforcing member which is superposed on the rear side member, the strength of the joint between the rear side member and the cross member is increased, and the skeleton member. The rigidity of is improved.

According to the seventh aspect of the present invention, since the wheel house inner is integrally press-molded on each of the left and right divided rear floors, it is not necessary to prepare the wheel house inner as a separate part. Therefore, the number of parts can be reduced.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to FIGS.
It will be described based on. It should be noted that the description overlapping with the conventional one is omitted.

First, the components will be described with reference to FIG. Reference numeral 8 denotes a rear side member. Corresponding portions 8a of the rear side member 8 for the wheel house inner 9 are curved inward with each other, and a flange 8f is basically formed at a portion other than the center of the corresponding portion 8a. The cross-section has an inverted hat shape.

Reference numeral 10 is a reinforcing member, which is a rear side member 8.
Has a shape substantially corresponding to. In this reinforcing member 10, a flange 10f is formed on the opposite side of the rear side member 8 where the flange 8f is omitted. The portion where the flange 10f is formed is the rear side member 8
It swells above (see FIG. 3), and a recess 12 having a shape corresponding to a cross member 11 described later is formed therein. The cross-sectional shape of this reinforcing member 10 is slightly smaller than that of the rear side member 8, and the rear side member 8
It can be polymerized inside.

The cross member 11 is an integrated product continuously formed along the vehicle width direction and has an inverted hat-shaped cross section, and both end portions 13 thereof are formed upright in accordance with the shape of the wheel house inner 9. Has been done. A notch 14 is also formed in the center of the cross member 11 in the vehicle width direction.

Reference numeral 15 is a pair of front and rear lateral link brackets. One end of a lateral link 17 supporting an axle beam 16 (see FIG. 4) as an axle is rotatably attached to the front and rear surfaces of the cross member 11. Each is installed in a downward position. A notch portion 18 similar to the notch portion 14 of the cross member 11 is also formed at each upper end of the lateral link bracket 15.

A rear floor 19 is divided into a right floor 20 and a left floor 21. Wheel house inners 9 are integrally formed on the outside of each of the right floor 20 and the left floor 21. That is, the wheel house inner 9 is also integrally formed during press forming of the right floor 20 and the left floor 21. Therefore, as compared with the conventional case where the wheel house inner 9 is prepared as a separate part and is joined to the corresponding part of the rear floor 19, the number of parts and the number of working steps are reduced.

Further, below the wheel house inner 9 on the right floor 20 and the left floor 21, a curved ridge 2 corresponding to the flange 10f of the reinforcing member 10 is formed.
2 is formed. Each of the right floor 20 and the left floor 21 has a rear seat installation space on the front side and a luggage compartment space on the rear side, and spare tire pans 23 are recessed in both of the luggage compartment spaces.
The divided end portion 25 of the right floor 20 has a flat shape, but the divided end portion 24 of the left floor 21 is formed with a downward convex portion 24a continuously along the front-rear direction. Although not shown, the convex portion 24a of the left divided end portion 24 is also continuously formed on the front surface of the spare tire pan 23 on the left floor 21. That is, this convex portion 24 is continuous without interruption in the front-rear direction of the left floor 21.

A reinforcement 26 is provided with a flange 26a at the front end thereof which is joined to the lower surface of the split end portion 24 of the left floor 21, and a flange 26b at the rear end thereof which is joined to the lateral link bracket 15. Has been done.

Reference numeral 27 is a reinforcing patch for attaching the seat belt anchor, which has a shape that can be joined to the split end portion 24 of the left floor 21 from below, and seat belts on the buckle side of the seat belt (not shown) at both ends thereof. The anchor can be attached from the upper surface side of the rear floor 19.

Reference numeral 28 denotes a U-shaped tow hook, which is attached to the rear end portion of the rear floor 19 in a state of being welded to a bracket 29 having an inverted hat cross section.

Next, a procedure for assembling the rear floor structure according to this embodiment will be described. First, the skeleton member on which the rear floor 19 is placed is assembled. That is, the reinforcing member 10 is superposed in the rear side member 8, and the corresponding portion of the cross member 11 is put in the recess 12 of the reinforcing member 10 for connection. The cross member 11 is thus reinforced with the reinforcement member 1
When assembled to the rear side member 8 via 0, both end portions 13 of the cross member 11 are located outside the rear side member 8, and in this state, a skeleton member for mounting the rear floor 19 is formed. Become. In this frame member, since the cross member 11 is attached to the rear side member 8 via the reinforcing member 10 as described above, the bonding strength between the cross member 11 and the rear side member 8 is very high, and the rigidity of the entire frame member is high. Will increase.

Next, the right floor 20 and the left floor 21 are placed on the skeleton member. At this time, the dimension of the rear floor 19 in the vehicle width direction is matched with the frame member by adjusting the overlapping degree of the respective divided end portions 24 and 25, and the left and right wheel house inners 9 are connected to both end portions 13 of the cross member 11. Respectively (see FIG. 4). In this way, the split end portion 2 of the right floor 20 and the left floor 21
Since the size of the rear floor 19 in the vehicle width direction can be finely adjusted to match the skeleton member by the number of 4 and 25, the positional relationship between the both ends 13 of the cross member 11 and the wheel house inner 9 is matched. , They can be joined in perfect condition. In FIG. 4, reference numeral 30 denotes a wheel house outer.

Next, after the wheel house inner 9 is joined to both end portions 13 of the cross member 11, the divided end portions 24 and 25 of the right floor 20 and the left floor 21 are joined together, and the rear side member is attached to the lower surface of the rear floor 19. The flanges 8f and 10f of the 8 cross member 11 are joined. As a result, the rear floor 19 including the right floor 20 and the left floor 21 is completely attached on the skeleton member, and the split end portions 24, 2 are formed at the center of the rear floor 19.
A closed cross-section portion H formed by 5 is formed along the front-rear direction. Since such a closed cross section H exists in the center of the rear floor 19, the overall rigidity of the rear floor 19 is sufficiently increased.

Strictly speaking, since the divided end portions 24 and 25 of the right floor 20 and the left floor 21 are vertically overlapped and joined to each other, the left floor 21 is the same as the plate thickness of the rear floor 19. It is lower than the right floor 20. Therefore, although not shown, the cross member 11 joined to the lower surface of the rear floor 19 also has a corresponding shape capable of closely adhering to the lower surface of the rear floor 19 in the above-described state.

As shown in FIG. 5, the lateral link bracket 15 is attached to the front and rear surfaces of the cross member 11 with the notch 18 at the upper end aligned with the closed cross section H, and the lateral link on the front side. The bracket 15 is supported by a reinforcement 26 attached to the closed section H. Therefore, the mounting strength of the lateral link bracket 15 is increased, and the suspension performance is improved.

The reinforcing patch 27 and the tow hook 28 are also provided.
Since the brackets 29 are also attached to the high-rigidity closed cross section H, the attachment strength of these components is increased, and the occupant restraint performance and the traction performance by the seat belt are also improved.

The upper ends of shock absorbers 31 are attached to the lower portions of both ends 13 of the cross member 11. The lower end of this shock absorber 31 is attached to the axle beam 16, and the shock absorber 3
Although the input F from the road surface is applied to both ends 13 of the cross member 11 via 1, the cross member 11 of this embodiment is an integrally molded product formed continuously along the vehicle width direction. Therefore, the input F applied from the shock absorber 31 to the both end portions 13 is the cross member 1 as it is.
1 It can be reliably received as a whole. Therefore, unlike the conventional case, it is not necessary to add various reinforcing members near both ends 13 of the cross member 11, and the number of parts and the vehicle body weight can be reduced.

In the above embodiment, the wheel house inner 9 is integrally press-molded with the right floor 20 and the left floor 21. However, the wheel house inner 9 is formed as a separate part and the left floor is formed. 21 and right floor 20
It may be integrally joined to the corresponding position in advance.

Further, in the embodiment, the shock absorber 31 of the axle beam type suspension using the lateral link bracket 15 is taken as an example, but a suspension type "shock absorber" other than that may be used.

[0043]

According to the invention of claim 1, the cross member is continuously formed along the vehicle width direction, and both ends thereof are connected to the wheel house inner at positions outside the rear side member. Therefore, the input applied to both ends of the cross member from the shock absorber is directly received by the entire cross member, and high rigidity is exhibited with respect to the input.

In addition, the rear floor is divided into two parts on the left and right sides, and the divided end portions are overlapped with each other.
Since it is mounted on the skeleton member composed of the rear side member and the cross member, the size of the rear floor in the vehicle width direction can be finely adjusted depending on the overlapping condition of the divided end portions. Therefore, it is possible to always connect the wheel house inner to both ends of the cross member in a reliable state.

According to the second aspect of the present invention, since the closed cross-section portions that are continuous in the front-rear direction are formed by the divided end portions that are overlapped with each other, the rigidity of the rear floor is increased.

According to the third aspect of the present invention, since the lateral link bracket mounted on the cross member is supported by the reinforcement mounted on the closed cross section of the rear floor, the mounting strength of the lateral link bracket is increased. , The suspension performance is improved.

According to the fourth aspect of the present invention, since the reinforcing patch for attaching the seat belt anchor is attached to the closed cross section of the rear floor, the attachment strength of the seat belt anchor is increased, and the occupant restraint performance by the seat belt is improved. improves.

According to the fifth aspect of the present invention, since the tow hook is attached to the closed cross section of the rear floor via the bracket, the attachment strength of the tow hook is increased and the tow performance by the tow hook is improved. .

According to the sixth aspect of the present invention, since the cross member is attached to the rear side member via the reinforcing member which is superposed on the rear side member, the strength of connection between the rear side member and the cross member is increased, and the skeleton member is formed. The rigidity of is improved.

According to the invention described in claim 7, since the wheel house inner is integrally press-molded on each of the left and right divided rear floors, it is not necessary to prepare the wheel house inner as a separate part. Therefore, the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a rear floor structure of an automobile according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a rear floor structure according to an embodiment.

FIG. 3 is a perspective view showing a skeleton member of a DA portion shown by an arrow in FIG.

FIG. 4 is a cross-sectional view showing a portion corresponding to a line SA-SA shown by an arrow in FIG.

FIG. 5 is a perspective view seen from below showing a state in which the lateral link bracket is attached.

FIG. 6 is a perspective view showing a rear floor structure of a conventional automobile.

7 is a cross-sectional view taken along the line SB-SB shown in FIG.

FIG. 8 is a sectional view corresponding to FIG. 7, showing a method of mounting the wheel house inner.

[Explanation of symbols]

 8 Rear Side Member 9 Wheel House Inner 10 Reinforcement Member 11 Cross Member 13 Both Ends 15 Lateral Link Bracket 19 Rear Floor 20 Right Floor 21 Left Floor 24, 25 Split End 26 Reinforce 27 Reinforcement Patch 28 Traction Hook 29 Bracket 31 Shock Absorber H Closed Cross section F input

Claims (7)

[Claims] 1. A cross member continuously formed along a vehicle width direction between a pair of left and right rear side members extending in the front-rear direction is erected in a state in which both end portions of the cross member extend outward from the rear side member, On the skeleton member composed of the rear side member and the cross member, the left and right split-type rear floors having wheel house inners connected to both ends of the cross member are mounted with their split end portions being overlapped with each other. A rear floor structure for an automobile, wherein shock absorbers of a rear suspension are attached to both ends of the cross member. 2. The rear floor structure for an automobile according to claim 1, wherein closed end portions which are continuous in the front-rear direction are formed by the divided end portions which are overlapped with each other. 3. A rear floor structure for an automobile according to claim 1, wherein a lateral link bracket is attached to the cross member, and the lateral link bracket is supported by a reinforcement attached to a closed cross section of the rear floor. . 4. A reinforcing patch for attaching a seat belt anchor is attached to a closed cross section of a rear floor.
The rear floor structure for an automobile according to any one of 3 above. 5. The rear floor structure for an automobile according to claim 1, wherein the tow hook is attached to the closed cross section of the rear floor via a bracket. 6. The cross member is attached to the rear side member via a superposed reinforcing member.
The rear floor structure for a vehicle according to any one of 1. 7. The rear floor structure for an automobile according to claim 1, wherein the wheel house inner is integrally press-molded on each of the left and right divided rear floors.