JPH11171048A - Body rear structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To devise the collapse mode of a body and a load transmission mode at the time of a rear-end collision so as to support a rear-end colliding vehicle further positively. SOLUTION: Body rear structure has a pair of rear floor side members 14L, 14R extended in the longitudinal direction of a vehicle on both lateral sides of the vehicle, and a cross member 18 connecting the rear end parts of the rear floor side members 14L, 14R. The rear floor side members are so constituted as to be deformed upward in Z-shape in a range of the rear edge part of the cross member is moving into substantially the same longitudinal position of the rear edge parts of rear wheels 10L, 10R above the original position at the time of a rear-end collision of another vehicle. Load received by the cross member 18 from the rear-end colliding vehicle is transmitted from the rear floor side members to lockers 20R, 20L and transmitted to the front parts of the rear floor side members through an engaging member 30, a spare tire 26 and a twist beam 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle body structure of a vehicle such as an automobile, and more particularly to a rear structure of a vehicle body.

[0002]

2. Description of the Related Art As one of rear structures of a vehicle body of a vehicle such as an automobile, a spare tire is provided by a subframe having increased bending rigidity at both ends as described in, for example, Japanese Patent Application Laid-Open No. 4-368288. A rear structure of a vehicle body configured to support a load due to a forward movement of the vehicle is already known.

[0003] According to the rear structure of the vehicle body, even when the vehicle is rear-collimated and the spare tire moves forward, the load caused by the movement of the spare tire can be reliably supported by the subframe. It is possible to reduce the risk of a situation in which the suspension member is greatly deformed.

[0004]

However, the above-mentioned conventional rear structure of the vehicle body is such that the load caused by the rear collision is supported by the sub-frame, and in order to further reduce the influence of the rear collision on the vehicle. It is preferable to further devise the manner of collapse of the vehicle body and the manner of load transmission during a rear collision so that the rear collision vehicle can be supported more reliably.

SUMMARY OF THE INVENTION The present invention has been made to further reduce the influence of a rear-end collision vehicle on a vehicle. By devising further, it is possible to more reliably support the rear impact vehicle.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a pair of rear floor side members extending in the front-rear direction of the vehicle on both left and right sides of the vehicle, and a pair of the rear floor side members are provided. A cross member for connecting a rear end portion, wherein the pair of rear floor side members have a rear edge of a rear wheel at a rear edge of the cross member higher than an original position when a rear collision of another vehicle occurs. A rear body structure (a configuration according to claim 1), which is configured to be deformed within a range in which the vehicle body moves to substantially the same front-back direction position;
Or a pair of rear floor side members extending in the vehicle front-rear direction on both left and right sides of the vehicle and connected to a frame member of the vehicle body at a front portion, and a cross member connecting rear ends of the pair of rear floor side members. Load transmitting means disposed between the pair of rear floor side members and in proximity to the cross member, wherein the load transmitting means transmits a load received by the cross member during a rear collision of another vehicle. The vehicle body rear structure (the configuration according to claim 4), wherein at least a part of the load transmission means is configured to be inclined forward when a rear collision of another vehicle occurs, or at both left and right sides of the vehicle. A pair of rear floor side members extending in the vehicle front-rear direction, and a cross member connecting rear ends of the pair of rear floor side members,
The rear portion of the pair of rear floor side members is positioned higher than the front portion, which is achieved by a vehicle body rear structure (the configuration of claim 14).

According to the first aspect of the present invention, the pair of rear floor side members have a rear edge of the cross member substantially above the original position and a rear edge of the rear wheel at the time of a rear collision of another vehicle. The rear impact side vehicle is absorbed by the deformation of the rear floor side member, so that the rear impact side vehicle can absorb not only the rear floor side member but also the rear impact side vehicle. It is also supported by the wheels, which reduces the possibility that the impact of the rear collision will extend to the front of the vehicle from the rear edge of the rear wheel, and also reduces the possibility that the rear impact vehicle will ride on the rear of the rear collision vehicle Is done.

According to the fourth aspect of the present invention, the load transmitting means is disposed between the pair of rear floor side members and close to the cross member. The received load is transmitted to the skeletal member, and at least a part of the load transmitting means is configured to tilt forward when a rear collision of another vehicle occurs. And the load is transmitted to the skeletal member via the load transmitting means, thereby effectively supporting the load of the rear-end collision vehicle, and the cross member and the rear end of the rear floor side member having a rearward inclined posture. Upon receiving a reaction force component upward from a part of the transmission means, the cross member is displaced forward and upward from its original position, whereby the rear impact vehicle gets on the rear portion of the rear vehicle. Les is reduced.

According to the above construction, since the rear portions of the pair of rear floor side members are located above the front portions, the height of the rear floor side members is constant over the entire length. As a result, it is possible to increase the height of the cross member without greatly reducing the interior space of the vehicle, which may cause the offending vehicle to ride on the rear portion of the rear impact vehicle from the beginning of the rear collision. Reduced.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the above-mentioned structure of the first aspect, the pair of rear floor side members are substantially upward in a lateral direction of the vehicle. It is configured to have a plurality of weak portions so as to be deformed into a Z shape (the configuration of claim 2).

According to the configuration of the second aspect, the pair of rear floor side members are substantially upward Z when viewed in the lateral direction of the vehicle.
Since the rear floor side member has a plurality of weak portions so as to deform into a shape, the rear floor side member is preferentially deformed at the plurality of weak portions during a rear collision of another vehicle, so that the rear edge of the cross member is securely positioned from the original position. The upper portion also deforms upward substantially in a Z-shape in a range where the rear wheel moves to a position substantially the same in the front-rear direction as the rear edge of the rear wheel.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the above-mentioned structure of the first aspect, the rear edge of the cross member has an upper portion as compared with a lower portion. And a cross-sectional shape located at the rear of the vehicle.

According to the third aspect of the present invention, the rear edge portion of the cross member has a cross-sectional shape in which the upper portion is located rearward of the vehicle as compared with the lower portion, so that the rear floor side member can be used at the time of rear collision of another vehicle. Is subjected to a compressive load via the cross member, a bending moment acts on the rear floor side member in a direction of urging the rear end upward, whereby the rear floor side member is surely deformed upward.

According to the present invention, at least a part of the load transmitting means is a spare tire. The load is transmitted to the skeletal member via a member extending in the vehicle lateral direction in front of the vehicle.

According to the fifth aspect of the present invention, at least a part of the load transmitting means is a spare tire, and transmits the load to the frame member through a member extending in the vehicle lateral direction in front of the spare tire. Therefore, it is possible to effectively use the spare tire as a part of the load transmitting means for transmitting the load of the rear impact vehicle to the skeletal member during a rear collision of another vehicle.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the structure of the above-mentioned claim 5, the spare tire may be a floor extending between the pair of rear floor side members. A direction changing means is provided which is suspended from a panel and moves a front portion of the spare tire downward when the spare tire is moved forward by the cross member (configuration of claim 6).

According to the sixth aspect of the present invention, the spare tire is suspended from the floor panel extending between the pair of rear floor side members, and the spare tire is moved forward by the cross member when the spare tire is moved forward by the cross member. Since the part is moved downward by the direction changing means, the spare tire surely assumes a forward leaning posture at the time of a rear collision of another vehicle, whereby the spare tire functions as a part of the load transmitting means and the cross member and the cross member A reaction force component for surely urging the rear end portion of the rear floor side member upward is given.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the structure of the above-mentioned claim 5, the spare tire is a floor extending between the pair of rear floor side members. The floor panel is arranged in a recess formed in the panel, and the floor panel is configured to include a direction changing means for moving a front portion of the spare tire downward when the spare tire is moved forward by the cross member. (Configuration of Claim 7).

According to the configuration of claim 7, the spare tire is arranged in the recess formed in the floor panel extending between the pair of rear floor side members, and when the spare tire is moved forward by the cross member. The front part of the spare tire is moved downward by the turning means,
In the event of a rear collision of another vehicle, the spare tire will surely be in a forward leaning posture without dropping, whereby the spare tire will surely function as a part of the load transmitting means, and the rear end of the cross member and the rear floor side member , A reaction force component for surely urging upward.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the structure of the above-mentioned claim 5, the spare tire may be a floor extending between the pair of rear floor side members. A direction changing means is provided in a recess formed in the panel, and is provided to move a rear portion of the spare tire upward when the spare tire is moved forward by the cross member. 8).

According to the eighth aspect of the present invention, the spare tire is disposed in the recess formed in the floor panel extending between the pair of rear floor side members, and when the spare tire is moved forward by the cross member. Since the rear part of the spare tire is moved upward by the turning means,
As in the case of the configuration of claim 7, at the time of a rear collision of another vehicle, the spare tire certainly assumes a forward leaning posture without dropping, whereby the spare tire reliably functions as a part of the load transmitting means, A reaction force component that reliably urges the rear end of the cross member and the rear floor side member upward.

According to the present invention, in order to effectively attain the above-mentioned main object, in the above-mentioned structure, the cross member may be provided behind another vehicle. An engagement member that engages with a rear edge of the rim portion of the spare tire at the time of collision is configured to be fixed (the configuration of claim 9).

According to the ninth aspect, at the time of a rear collision of another vehicle, the engaging member fixed to the cross member engages with the rear edge of the rim portion of the spare tire. Securely engages the rim of the spare tire via
Therefore, at the time of a rear collision, the load received by the cross member from the rear impact vehicle is reliably transmitted to the spare tire, and the upward reaction force component of the spare tire is reliably applied to the cross member via the engaging member.

According to the present invention, in order to effectively attain the above-mentioned main object, in the structure of the above-mentioned claim 5, the pair of rear floor side members may be provided with the cross member at the time of a rear collision of another vehicle. The rear edge of the rear wheel is configured to be deformed in a range where the rear edge moves to a position substantially the same as the rear edge of the rear wheel in the front-rear direction above the original position.

According to the tenth aspect, the rear floor side members of the pair of the cross members are substantially above the rear edge of the rear wheel when the rear collision of another vehicle occurs, with the rear edge of the cross member being higher than the original position. Since it deforms in the range of moving to the same front-back direction position, the energy of the rear impact vehicle is absorbed by the deformation of the rear floor side member, and the load of the rear impact vehicle is supported by the rear floor side member and the rear wheel. The spare tire functions as a part of the load transmitting means, which effectively reduces the possibility that the rear impact affects the front of the vehicle more than the rear edge of the rear wheel. The risk of riding on the rear part of the vehicle is effectively reduced.

According to the present invention, in order to effectively attain the above-mentioned main object, in the structure of the fifth aspect, the member extending in the lateral direction of the vehicle is opened toward the rear of the vehicle. A twist beam having a substantially U-shaped cross section and disposed in front of and below the spare tire, wherein a lower side portion of the twist beam extends rearward of the vehicle as compared with an upper side portion. (Configuration of Claim 11).

According to the eleventh aspect, the member extending in the lateral direction of the vehicle has a substantially U-shaped cross section opened toward the rear of the vehicle.
It is a twist beam that is formed in front of and below the spare tire, and the lower side of the twist beam extends rearward of the vehicle as compared to the upper side, so that the spare tire is used when a rear collision of another vehicle occurs. Is moved forward by the cross member, the front edge thereof is supported by the twist beam, whereby an upward reaction force component is reliably applied to the rear ends of the cross member and the rear floor side member.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the structure of the above-mentioned claim 5, a portion of the load transmitting means other than the spare tire faces the spare tire. The configuration of the spare tire is substantially the same as the contour of the spare tire.

According to the twelfth aspect, the portion of the load transmitting means other than the spare tire has substantially the same shape as the contour of the spare tire at a portion facing the spare tire, so that the vehicle is located closer to the center than the spare tire. Even when a rear collision occurs due to another vehicle at a position offset to the left or right, the load received by the cross member from the rear collision vehicle is reliably transmitted to the spare tire, which further increases the load of the rear collision vehicle. It is definitely supported.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the structure of the above-mentioned claim 5, the member extending in the lateral direction of the vehicle is provided at the time of a rear collision of another vehicle. It is configured to have a spare tire receiving portion for receiving a front edge portion of the spare tire (claim 13).

According to the thirteenth aspect, the member extending in the lateral direction of the vehicle has the spare tire receiving portion for receiving the front edge of the spare tire at the time of a rear collision of another vehicle.
As in the case of the first configuration, when the spare tire is moved forward by the cross member at the time of a rear collision of another vehicle, the front edge portion is supported by the spare tire receiving portion, whereby the cross member and the rear floor side member are An upward reaction force component is reliably applied to the rear end.

[0032]

According to a preferred aspect of the present invention, in the configuration of the first aspect, the rear edge of the rear wheel is the rear edge of the rim portion of the rear wheel. (Preferred embodiment 1).

According to another preferred embodiment of the present invention, in the configuration of the second aspect, the plurality of weak portions include a first weak portion provided on an upper edge of the rear floor side member, and a cross member. And a second weak portion provided on the lower edge of the rear floor side member between the first weak portion and the first weak portion (preferable mode 2).

According to another preferred embodiment of the present invention, in the configuration of the preferred embodiment 2, the rear floor side member has a substantially U-shaped cross section and a rear floor side member member. The reinforce is fixedly disposed in the side member member and has a substantially U-shaped cross section that is open upward. The first and second weak portions are provided in the reinforce (preferred embodiment 3).

According to another preferred aspect of the present invention, in the configuration of the third aspect, at least a part of the load transmitting means is configured as a spare tire (preferred aspect 4).

According to another preferred aspect of the present invention, in the configuration of the fourth aspect, the load transmitting means is separated from the cross member connected to the rear end of the rear floor side member in front of the vehicle. And another cross member extending in the vehicle lateral direction and connected to a rear floor side member at both ends, and a cross member connected to a rear end portion of the rear floor side member and the other cross member. It is configured to include a load transmitting member disposed therebetween (preferred embodiment 5).

According to another preferred embodiment of the present invention, in the configuration of the third aspect, at least a part of the load transmitting means is tilted forward at the time of a rear collision of another vehicle and forwardly moved by a predetermined amount or more. And it is comprised so that downward movement may be regulated (preferred mode 6).

According to another preferred embodiment of the present invention, in the configuration of the above-mentioned claim 5, the member extending in the vehicle lateral direction has a structure in which the member extending from the cross member connected to the rear end portion of the rear floor side member is provided. It is configured to be another cross member spaced forward and extending in the vehicle lateral direction and connected to the rear floor side members at both ends (preferred embodiment 7).

According to another preferred aspect of the present invention, in the configuration of the fifth aspect, the member extending in the lateral direction of the vehicle is mounted on the vehicle by a cross member connected to the rear end of the rear floor side member. It is configured to be a suspension member spaced forward and extending laterally of the vehicle and supported at both ends by rear floor side members (preferred mode 8).

According to another preferred aspect of the present invention, in the configuration of claim 6 or 7, the direction changing means is provided at a front portion of the spare tire at a portion facing the front portion of the spare tire. It is configured to form a corresponding arc (preferred embodiment 9).

According to another preferred embodiment of the present invention, in the configuration of the eighth aspect, the turning means corresponds to a rear portion of the spare tire at a portion facing the rear portion of the spare tire. It is configured to form an arc (preferred embodiment 10).

According to another preferred aspect of the present invention, in the configuration of the ninth aspect, the engaging member is configured to be fittedly engaged with a rear edge of the rim portion of the spare tire. (Preferred embodiment 11).

According to another preferred aspect of the present invention, in the configuration of the ninth aspect, the engaging member moves the rear portion of the spare tire upward by a predetermined amount or more relative to the cross member. (Preferred embodiment 12).

According to another preferred embodiment of the present invention, in the configuration of the thirteenth aspect, the member extending in the lateral direction of the vehicle has a substantially U-shaped cross section opened toward the rear of the vehicle. The twist beam is disposed in front of and below the spare tire, and the spare tire receiving portions are provided at the rear edges of the upper side and the lower side of the twist beam (preferred mode 13).

According to another preferred embodiment of the present invention, in the structure of the aforementioned preferred embodiment 13, the spare tire receiving portion provided on the lower side portion is provided with a spare tire receiving portion provided on the upper side portion. It is configured to be located at least behind the vehicle (preferred embodiment 14).

According to another preferred aspect of the present invention, in the above construction, the pair of rear floor side members are provided at a rear portion of the wheel house in a region behind the center portion of the wheel house. (Preferred aspect 15).

According to another preferred embodiment of the present invention, in the structure of the fourteenth aspect, the rear portions of the pair of rear floor side members are supported by the pair of rear floor side members and extend substantially horizontally. (Preferred mode 16).

According to another preferred embodiment of the present invention, in the structure of the preferred embodiment 16, each rear floor side member is defined by a rear floor side member member and a side edge of a floor panel. (Preferred embodiment 17).

[0049]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to the accompanying drawings, in which several preferred embodiments are shown.

FIG. 1 is a plan view showing a first embodiment of a vehicle body rear structure according to the present invention, and FIG. 2 is a side view showing a main part of the first embodiment.

In these figures, reference numerals 10L and 10R denote left and right rear wheels, respectively, and these wheels are rotatably supported by rear ends of suspension arms 12L and 12R via an axle, respectively. Suspension arms 12L and 12R are pivotally supported at their front ends by rear floor side members 14L and 14R about axes 16L and 16R, respectively, via brackets and bushing devices not shown.

Rear floor side members 14L and 14R
Extend in the longitudinal direction of the vehicle on both left and right sides of the vehicle, and their rear ends are rigidly connected to each other by a cross member 18 extending in the lateral direction of the vehicle. The rear floor side members 14L and 14R are rigidly connected at their front ends to rockers 20L and 20R as frame members, respectively, and the rockers 20L and 20R are rigidly connected to each other by a cross member 22 extending in the lateral direction of the vehicle. ing.

In the illustrated embodiment, the suspension is a twist beam type (torsion beam type) suspension, and suspension arms 12L and 12L are used.
R are rigidly connected to each other by a twist beam 24 extending in the transverse direction of the vehicle, and the twist beam 24 has a substantially U-shaped cross section opened rearward. Spare tire 26 is provided between twist beam 24 and cross member 16.
Are arranged, and a fuel tank FT is arranged between the twist beam 24 and the cross member 22.

A turning member 28 extending in the lateral direction of the vehicle is disposed behind and above the twist beam 24. The turning member 28 has a rear floor side member 14L at both ends.
And 14R. An engaging member 30 that engages with the spare tire 26 at the time of a rear collision of the vehicle is fixed to the front surface of the cross member 18, and the front edge of the engaging member 30 is separated slightly behind the spare tire 26 from the vehicle. And substantially the same arc shape as the contour of the spare tire.

As shown in FIG. 2, a rear floor pan 32 is placed on the rear floor side members 14L and 14R.
The rear portion of the 4R extends substantially linearly. As shown in FIGS. 2 to 4 with respect to the rear floor side member 14R, each of the rear floor side members in the illustrated embodiment has a rear floor side member member 15L and 15R having a U-shaped cross section that opens upward. Reinforces 34 are fixedly disposed in each rear floor side member.

The reinforce 34 also has a U-shaped cross section that is open upward, and in the illustrated embodiment, particularly, in the illustrated embodiment, the upper edges of both side walls at positions near the rotation center of the wheel 10L or 10R. Is provided with a downward concave portion 34A as a first weak portion, and an upward concave portion 34B as a second weak portion is provided on a bottom wall portion at a position close to the rear end portion.

Therefore, as shown in FIGS. 2 and 5,
When the vehicle 36 is subjected to a rear collision by the offending vehicle 38, the rear floor side member and the reinforce are deformed to be bent upward at the position of the concave portion 34A and the concave portion 3
At the position of 4B, it is deformed to be bent downward, whereby the whole is deformed into a Z-shape when viewed from the side of the vehicle.
In this case, the distance between the concave portion 34A and the concave portion 34B and the distance between the concave portion 34B and the rear edge of the cross member 16 are, as shown in FIG. The rear edge portion is set to be located at the substantially same front-rear position as the rear edge of the wheel 10L or 10R, preferably the rear edge of the rim portion 10LA, 10RA.

Further, in the illustrated first embodiment, the cross member 16 has a cross-sectional shape in which an upper portion thereof is located on the rear side of the vehicle as compared with a lower portion thereof. As particularly shown in detail in FIG. 6, the rear surface of the cross member 16 has an upper portion 18A extending substantially vertically and a lower portion 18B inclined obliquely downward, and the upper portion 18A comprises a rear floor side. The members 14L, 14R are located above the lower edges. Accordingly, when the cross member 16 receives a high load F forward of the vehicle from the rear impact vehicle 38 via the rear bumper 36A of the vehicle 36, the rear floor side member receives a bending moment M that urges the rear end upward.
The rear floor side members surely deform upward in a Z-shape as shown in FIG.

Thus, according to the illustrated first embodiment,
When the vehicle 36 receives a rear collision, the rear floor side member is deformed upward in a Z-shape as shown in FIG. 5, and the rear edge of the cross member 16 is higher than the original position and the wheel 1
Since the rim portions 10LA and 10RA of 0L or 10R move to substantially the same front-back direction position as the rear edge, the energy of the rear impact vehicle 38 received by the cross member 16 is changed by the deformation of the rear floor side members 14L and 14R. Absorbed,
Not only is the load of the rear impact vehicle transmitted to the lockers 20L and 20R via the rear floor side members, but also the lockers 20L and 20R via the engagement members 30, the spare tires 26, the twist beams 24, and the rear floor side members 14L and 14R. 20R, whereby the rear-end collision injured vehicle is securely supported, so that the rear-end collision can be effectively prevented from reaching the rear edge of the rim portion of the wheel. It is possible to effectively prevent the offending vehicle 38 from riding on the damaged vehicle.

In particular, according to the illustrated first embodiment, the cross member 16 has the above-described configuration, and the vehicle 36
When the cross member 16 receives a high load in front of the vehicle at the time of a rear collision, a bending moment is applied to the rear floor side members 14L and 14R to urge the rear ends of the rear members upward, so that the rear floor side members are reliably moved upward Z. Can be transformed into shape.

According to the illustrated first embodiment, the rear floor side members 14L and 14R are composed of the rear floor side member members and the reinforces 34, and the reinforces are provided with the concave portions 34A and 34B as weak portions. Muddy water and the like can be reliably prevented from entering the rear floor side member. However, if necessary, the reinforce may be omitted and a concave portion may be provided in the rear floor side member member.

FIG. 8 is a longitudinal sectional view showing a sectional view taken along the line I.
Fig. 7 shows the movement of the spare tire during a rear collision of the vehicle.
It is a longitudinal cross-sectional view similar to.

In these figures, the spare tire 26 is suspended and supported below the rear floor pan 32 in a state parallel to the rear floor pan by a mounting device not shown. As shown, the surface of the direction change member 28 facing the spare tire 26 is inclined rearward and downward of the vehicle, and has an arc shape substantially identical to the contour of the spare tire when viewed from below the vehicle. ing.

The upper side 24A of the twist beam 24
The portion of the lower side 24B facing the spare tire 26 has an arc shape when viewed in the vertical direction, and the lower side 24B extends rearward of the vehicle from the upper side 24A. Further, the front side portion of the engaging member 30 fixed to the cross member 16 has an outer surface shape corresponding to the inner surface shape of the rim portion 26A of the spare tire 26, and substantially matches the contour of the spare tire when viewed from above the vehicle. Have the same circular arc shape.

In this embodiment, when the vehicle receives a rear collision and the cross member 16 is moved forward of the vehicle, FIG.
As shown in (A), the front side portion of the engaging member 30 engages with the rim 26A of the spare tire 26 in a fitting manner,
The spare tire is moved forward of the vehicle by the engaging member, so that the spare tire has its front edge portion turned by the turning member 28.
Are also moved downward by being engaged by the twist beam 24.

As shown in FIG. 8 (B), when the phenomenon of rear collision further progresses, the spare tire 26 pivots forward and upward about its front edge, whereby the engagement member 30 The cross beam 16 also moves forward and upward, and the rear ends of the rear floor side members 14L and 14R are moved forward and upward by the cross beam 16, although not shown in FIGS.

Therefore, according to the second embodiment, the front edge of the spare tire 26 and the twist beam 2
6 and the trailing edge of the spare tire and the engaging member 30
Can be maintained in an engaged state, so that the load received by the cross beam 16 can be surely applied to the twist beam 24.
And the engagement member 30 and the cross beam 16 receive a reaction force component upward from the spare tire 26 in the forwardly inclined posture, so that the cross beam is reliably moved upward from its original position. Thus, it is possible to reduce the possibility that the offending vehicle runs on the rear-end collision vehicle 36.

Further, the twist beam 24 and the direction changing member 2
8. Since the portion of the engaging member 30 facing the spare tire 26 has an arc shape substantially the same as the contour of the spare tire, the vehicle is subjected to a rear collision at a position offset left and right from the center. Also, it is possible to reliably support the load of the rear impact vehicle, and as shown in FIG.
As a result, the rear side of the cross member 16 that has received the rear collision moves upward, so that the attacking vehicle becomes a rear collision vehicle 36.
Can be effectively reduced.

FIGS. 10 to 13 are longitudinal sectional views similar to FIG. 7, showing the main parts of the third to sixth embodiments of the rear body structure of the vehicle body according to the present invention. In these figures, the same members as those shown in FIG. 7 are denoted by the same reference numerals as those in FIG. Although not shown in the drawings, the rear floor side members in these embodiments are configured similarly to the rear floor side members of the first embodiment.

In the third embodiment shown in FIG. 10, the rear edges of the upper side 24A and the lower side 24B of the twist beam 24 are deformed away from each other and rearwardly impact the vehicle. Spare tire receivers 40A and 40B for receiving the front edge of the spare tire 26 at times are provided,
Spare tire receiving part 40B is spare tire receiving part 40A.
It is located behind and below.

Therefore, according to the third embodiment, it is possible to more reliably support the front edge of the spare tire 26 at the time of a rear collision of the vehicle as compared with the case of the second embodiment. The spare tire 26 can be more reliably brought to the forward leaning posture than in the case of the second embodiment.

In the fourth embodiment shown in FIG. 11, between the cross member 22 and the cross member 18, the vehicle extends in the vehicle lateral direction and the rear floor side members 14 are provided at both ends.
A cross member 42 rigidly connected to the L and 14R is provided, and a bulkhead 44 is disposed inside the cross member 42.

The rear floor pan 32 is a cross member 4
A spare tire storage portion 32A having a concave shape is provided between the spare tires 2 and 18, and the spare tire 26 is fixedly stored in the storage portion 32A by a mounting device (not shown). The storage portion 32A is closed by a flat lid member 46. A recess 32B is provided at the front edge of the storage portion 32A, and both upper and lower side walls of the recess 32B are inclined forward and downward. Tire 26
Function as a direction change member for moving the front edge portion of the first member downward.

Therefore, according to the fourth embodiment, when the spare tire 26 is moved forward by the cross member 16 and the engaging member 30 at the time of a rear collision of the vehicle, the front edge of the spare tire fits into the recess 32B. As a result, the load of the rear-end collision vehicle can be reliably transmitted to the front portions of the rear floor side members 14L, 14R via the cross member 42, and the spare tire 26 can be reliably tilted forward. Can bring.

Also in the fifth embodiment shown in FIG. 12, the spare tire 26 is fixedly stored in the storage portion 32A, but the front edge of the storage portion 32A is recessed. 32B is not provided, and a direction changing member 48 is fixedly disposed on the rear floor pan 32 and the cross member 16 at the rear end of the storage portion 32A. Direction change member 4
8 has an upper surface inclined forward and downward, and the inclined upper surface is circular along the rear edge of the spare tire 26 similarly to the front side portion of the engaging member 30 of the first to fourth embodiments. It extends in an arc.

On the front side of the vehicle at the upper end of the cross member 16, a convex portion is engaged with the rear end of the spare tire 26 at the time of rear collision of the vehicle to prevent the rear end of the spare tire from moving upward any further. 18C is provided. Further, in this embodiment, the cross member 4 in the fourth embodiment is used.
2 is not provided, and a suspension member 50 extending in the vehicle lateral direction and supported at both ends by rear floor side members 14L and 14R is disposed in front of the spare tire storage portion 32A.

In the fifth embodiment, when the cross member 16 and the direction change member 48 move forward in the rear collision of the vehicle, the spare tire 26 moves forward and the rear portion thereof moves upward. As a result, the spare tire assumes a forward leaning posture, and its rear edge is cross member 1.
6 and the front edge of the spare tire is connected to the suspension member 50 via the rear floor pan 32.
Supported by

Therefore, also in the fifth embodiment, the load of the rear impact vehicle can be reliably supported,
By tilting the spare tire 26 forward, an upward reaction force component can be reliably applied to the rear ends of the cross member 16 and the rear floor side members 14L and 14R.

The sixth embodiment shown in FIG. 13 is suitable for a vehicle in which the spare tire 26 is not stored in front of the cross member 16. The rear floor pan 32 is flat as in the first and second embodiments, but a cross member 42 is provided between the cross members 22 and 16 as in the fourth embodiment. The side surface is inclined forward and downward.

The cross member 42 and the cross member 16
A load transmitting member 52 is disposed below the rear floor pan 32 between the front and rear ends. The load transmitting member 52 is fixed to the cross member 42 at the front end and the cross member 16 at the rear end.
It is fixed to. The front end of the load transmitting member 52 is inclined forward and downward while being spaced rearward from the cross member 42. A support member 54 that supports the front end of the load transmitting member 52 at the time of a rear collision of the vehicle is fixed to the lower surface of the cross member 42.

Therefore, according to the sixth embodiment, when the cross member 16 slightly moves forward of the vehicle at the time of a rear collision of the vehicle, the front end of the load transmitting member 52 engages with the cross member 42 and urges it downward. And is supported by the support member 54, so that the load of the rear-end collision vehicle can be reduced earlier in the rear-end collision than in the case of the second to fifth embodiments described above.
Through the front side of the rear floor side members 14L and 14R, and an upward reaction force component can be applied to the cross member 16 from an early stage of a rear collision.

The rear floor side members in the second to sixth embodiments described above may have a general structure without the concave portions 34A and 34B in the first embodiment. It is preferable that the side members have the same structure as in the first embodiment. In this case, the rear floor side members can be surely deformed upward into a Z-shape as compared with the case of the first embodiment.

FIG. 14 is a perspective view showing a main part of a seventh embodiment of the rear body structure of the vehicle body according to the present invention, and FIG. 15 is a line A of FIG.
1A, a cross-sectional view along line BB (B), a cross-sectional view along line CC (C), FIG. 16 and FIG.
7 is a perspective view showing a rear floor pan and a rear floor side member member shown in FIG. 14, respectively. In these figures, the same members as those shown in FIGS. 1 to 13 are denoted by the same reference numerals as those in these drawings.

In FIG. 14, reference numeral 14L denotes a left rear floor side member, and reference numeral 32 denotes a rear floor pan. The rear floor pan 32 has a flat plate shape except for a concave spare tire storage portion 32A and a raised side edge portion 32C behind the wheel house 56. In this embodiment, the rear floor side member 14L is defined by the rear floor side member member 15L and the side edge 32C of the rear floor pan 32 shown in FIG.

The rear floor side member member 15L is linearly formed in the center of the wheel house 56 on the inboard side in the longitudinal direction of the vehicle similarly to the rear floor side members 14L and 14R in the other embodiments described above. It has a substantially U-shaped cross-section that extends and opens upward, but curves outwardly along the rear portion of the wheel house 56, and the vehicle is positioned near the rear end of the wheel house. At the rear, it extends linearly in the longitudinal direction of the vehicle.

In particular, the bottom wall 15LA of the rear floor side member member 15L is gradually displaced upward in a region curved outwardly of the vehicle along the rear portion of the wheel house 56, and in a region extending linearly behind the bottom wall 15LA. In this case, the rear floor pan 32 has substantially the same height. Correspondingly, the outer side wall 15 of the rear floor side member member 15L
The LB is curved like the bottom wall and then linearly extends rearward. On the other hand, the inner side wall 15LC extends along the rear part of the wheel house 56 to the rear end of the region curved outwardly of the vehicle so that the height of the upper edge is constant.

Further, as shown in FIG. 16, the side edge 32C of the rear floor pan 32 is curved outward toward the vehicle along the rear portion of the wheel house 56 and is gradually displaced upward. Like the rear floor side member member 15L, it extends linearly rearward in the vehicle front-rear direction, so that the side edge 32C cooperates with the rear floor side member member 15L to form the rear floor side member 14L. I have decided. Although not shown in the drawing, the rear floor side member 14R on the right side of the vehicle is configured similarly to the rear floor side member 14L.

In FIG. 14, 58 and 60 indicate a quarter wheel house inner panel and a quarter wheel house outer panel, respectively, and 62 indicates a rear suspension spring support.
Reference numeral 64 denotes a roof side inner panel,
Denotes a side outer panel, and 68 denotes a body lower back panel.

Thus, according to the seventh embodiment, the rear portions of the rear floor side members 14L and 14R are located at a higher position than the front portions, so that the rear floor side members have a constant height over their entire length. As compared with the case where the vehicle extends rearward, it is possible to reduce the possibility that the rear impact vehicle will ride on the damaged vehicle from the initial stage of the rear collision of the vehicle.

Also in the seventh embodiment, the reinforce having the concave portions 34A and 34B in the first embodiment may be used, but the rear floor side members 14L and 14R are directed rearward of the vehicle. Since it has a gradually rising part, if it receives a compressive load at the time of a rear collision of the vehicle, its rear part is displaced upward while moving forward surely,
Even if a reinforce having a concave portion is not provided, it is possible to effectively reduce the possibility that a rear-end collision vehicle will get on the damaged vehicle, and to omit the reinforce to simplify the structure of the rear floor side member and reduce the manufacturing cost. be able to.

Further, according to the seventh embodiment, since the rear floor side members are curved outwardly of the vehicle along the rear portion of the wheel house 56, the rear floor side members are linearly viewed from above the vehicle. The interior space of the vehicle can be increased as compared with the structure extending in the front-rear direction of the vehicle.

Further, according to the seventh embodiment shown in the drawings, the rear floor side member is formed by the rear floor side member member and the side edge 32C of the rear floor pan 32, so that, for example, the rear floor side members 14L and 14R are substantially formed. The structure of the rear floor side member member can be simplified and the manufacturing cost can be reduced as compared with the case where the rear floor side member member of the same form is fixed to the side edge of the rear rear floor panel.

In the above-described third to seventh embodiments, since the members extending in the lateral direction of the vehicle do not need to be twist beams, the suspension in these embodiments can be of any type. May be something.

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to the above-described embodiments, and various other embodiments may be included within the scope of the present invention. It will be clear to those skilled in the art that is possible.

For example, in the above-described second to fifth embodiments, the rear edge of the cross member 18 is a substantially flat surface extending in the vertical direction. The rear edge of the member may be formed in the same form as the cross member in the first or sixth embodiment.

[0096]

As is apparent from the above description, according to the first aspect of the present invention, the energy of the rear impact vehicle is absorbed by the deformation of the rear floor side member, and the rear impact vehicle is moved to the rear floor side member. Not only is it supported by the rear wheel, but also the possibility of the rear impact affecting the vehicle ahead of the rear edge of the rear wheel can be reduced. It is possible to reduce the risk of riding on the part.

According to the configuration of claim 2, the rear floor side member is preferentially deformed at a plurality of weak portions at the time of a rear collision of another vehicle, so that the rear edge of the cross member is higher than the original position. Thus, the rear floor side member can be surely deformed upward substantially into a Z-shape in a range where the rear floor side member moves to the substantially same front-back position as the rear edge of the rear wheel.

According to the third aspect of the present invention, when the rear floor side member receives a compressive load via the cross member at the time of a rear collision of another vehicle, the rear floor side member is forced to bias the rear end upward. Since the bending moment acts, the rear floor side member can be reliably deformed upward.

According to the fourth aspect of the present invention, the load of the other rear-end collision vehicle is transmitted to the skeleton member via the rear floor side member and to the skeleton member via the load transmission means. Since the load of the vehicle can be effectively supported and the rear ends of the cross member and the rear floor side member receive a reaction force component upward from a part of the load transmitting means in the forwardly inclined posture, the cross member Is displaced forward and upward from its original position, thereby reducing the possibility that the rear impact vehicle will ride on the rear portion of the rear impact vehicle.

According to the fifth aspect of the present invention, the spare tire can be effectively used as a part of the load transmitting means for transmitting the load of the rear impact vehicle to the skeletal member during a rear collision of another vehicle. it can.

According to the structure of claim 6, the spare tire surely assumes a forward leaning posture at the time of a rear collision of another vehicle, whereby the spare tire can function as a part of the load transmitting means. A reaction force component can be reliably applied to the rear ends of the cross member and the rear floor side member so as to urge upward.

According to the constructions of claims 7 and 8, the spare tire can be surely brought into the forward leaning posture without dropping the spare tire at the time of a rear collision of another vehicle. In addition to being able to function as a part, it is possible to apply a reaction force component that reliably urges the rear ends of the cross member and the rear floor side member upward.

According to the ninth aspect, the cross member is securely engaged with the rim portion of the spare tire via the engaging member, so that the load received by the cross member from the rear impact vehicle during a rear collision is ensured. And the upward reaction force component of the spare tire can be reliably applied to the cross member via the engaging member.

According to the tenth aspect, the energy of the rear impact vehicle is absorbed by the deformation of the rear floor side member, the load of the rear impact vehicle is supported by the rear floor side member and the rear wheel, and the spare tire is supported. Since it functions as a part of the load transmitting means, it is possible to effectively reduce the possibility that the influence of the rear collision extends to the front of the vehicle from the rear edge of the rear wheel. The risk of riding on the rear part of the vehicle can be effectively reduced.

According to the eleventh aspect, when the spare tire is moved forward by the cross member at the time of a rear collision of another vehicle, its front edge is supported by the twist beam. An upward reaction force component can be reliably applied to the rear end of the side member.

According to the twelfth aspect of the present invention, the portion of the load transmitting means other than the spare tire has substantially the same shape as the contour of the spare tire at a portion facing the spare tire, so that the vehicle can be positioned at the center. Even when a rear-end collision occurs due to another vehicle at a position offset more to the left and right, the load received by the cross member from the rear-end collision vehicle can be reliably transmitted to the spare tire. The load can be more reliably supported.

According to the thirteenth aspect, when the spare tire is moved forward by the cross member at the time of a rear collision of another vehicle, its front edge is supported by the spare tire receiving portion. An upward reaction force component can be reliably applied to the rear end of the rear floor side member.

According to the fourteenth aspect, the rear portions of the pair of rear floor side members are located higher than the front portions, so that the height of the rear floor side members is constant over the entire length. In comparison, the height of the cross member can be increased without significantly reducing the interior space of the vehicle, thereby reducing the possibility that the offending vehicle will ride on the rear part of the rear-hit vehicle from the beginning of the rear-end collision. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a vehicle body rear structure according to the present invention.

FIG. 2 is a side view showing a main part of the first embodiment.

FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 2B is a cross-sectional view taken along line (B), and FIG.

FIG. 4 is a perspective view showing a right rear floor side member.

FIG. 5 is a side view showing a state in which a rear portion of the rear floor side member is deformed upward into a Z shape.

FIG. 6 is an enlarged side view showing a cross member connected to a rear end of a rear floor side member.

7 is a longitudinal sectional view showing a main part of a second embodiment of the vehicle body rear structure according to the present invention as a sectional view along line VII-VII in FIG. 1;

FIG. 8 is a longitudinal sectional view similar to FIG. 7, showing the movement of the spare tire at the time of a rear collision of the vehicle for the initial stage (A) and the latter period (B) of the rear collision.

FIG. 9 is a rear view showing a deformed state of the cross member when the vehicle receives a rear collision from diagonally rearward.

FIG. 10 is a longitudinal sectional view similar to FIG. 7, showing a main part of a third embodiment of a vehicle body rear structure according to the present invention.

FIG. 11 is a longitudinal sectional view similar to FIG. 7, showing a main part of a fourth embodiment of a vehicle body rear structure according to the present invention.

FIG. 12 is a longitudinal sectional view similar to FIG. 7, showing a main part of a fifth embodiment of a vehicle body rear structure according to the present invention.

FIG. 13 is a longitudinal sectional view similar to FIG. 7, showing a main part of a sixth embodiment of a vehicle body rear structure according to the present invention.

FIG. 14 is a perspective view showing a main part of a seventh embodiment of a vehicle body rear structure according to the present invention.

15 is a sectional view taken along line AA in FIG.
Section view (B) along line -B, section view (C) along line CC
It is.

FIG. 16 is a perspective view showing the rear floor pan shown in FIG.

FIG. 17 is a perspective view showing a rear floor side member member shown in FIG. 14;

[Explanation of symbols]

 14L, 14R ... rear floor side members 18, 22, 42 ... cross members 24 ... twist beams 26 ... spare tires 28, 48 ... direction changing members 30 ... engaging members 32 ... rear floor pans 34 ... reinforces 40A, 40B ... spare tire receiving portions Reference numeral 50: suspension member 52: load transmitting member 54: support member 56: wheel house

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsushi Hiroshige 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Co., Ltd. (72) Inventor Hiroaki Date 1 Toyota Vehicle Town, Toyota City, Aichi Prefecture Toyota Motor Corporation

Claims (14)

[Claims] A pair of rear floor side members extending in the vehicle front-rear direction on both left and right sides of the vehicle; and a cross member connecting rear ends of the pair of rear floor side members. The side member is deformed in the range where the rear edge of the cross member moves to a position substantially the same as the rear edge of the rear wheel above the original position at the time of a rear collision of another vehicle. A vehicle body rear structure characterized by being configured as described above. 2. A rear body structure according to claim 1, wherein said pair of rear floor side members have a plurality of weak portions so as to substantially deform upward in a Z-shape when viewed in the lateral direction of the vehicle. . 3. The vehicle body rear structure according to claim 1, wherein the rear edge of the cross member has a cross-sectional shape in which an upper portion is located rearward of the vehicle as compared with a lower portion. 4. A pair of rear floor side members extending in the vehicle front-rear direction on both left and right sides of the vehicle and connected to a frame member of the vehicle body at a front portion, and rear ends of the pair of rear floor side members are connected. And a load transmitting means disposed between the pair of rear floor side members and close to the cross member, and the load transmitting means is received by the cross member during a rear collision of another vehicle. A vehicle body rear structure, wherein a load is transmitted to the skeletal member, and at least a part of the load transmitting means is inclined forward when a rear collision of another vehicle occurs. 5. The vehicle according to claim 1, wherein at least a part of said load transmitting means is a spare tire, and said load transmitting means transmits a load to a frame member through a member extending in a vehicle lateral direction in front of said spare tire. Item 5. The rear body structure of the vehicle body according to item 4. 6. The spare tire is suspended from a floor panel extending between the pair of rear floor side members, and a front portion of the spare tire is moved when the spare tire is moved forward by the cross member. The vehicle body rear structure according to claim 5, further comprising a direction changing means for moving the vehicle body downward. 7. The spare tire is disposed in a recess formed in a floor panel extending between the pair of rear floor side members, and the floor panel is moved forward by the cross member. The vehicle body rear structure according to claim 5, further comprising a direction changing means for moving a front portion of the spare tire downward. 8. The spare tire is disposed in a recess formed in a floor panel extending between the pair of rear floor side members, and is provided when the spare tire is moved forward by the cross member. The vehicle body rear structure according to claim 5, further comprising a direction changing means for moving a rear portion of the tire upward. 9. The cross member is fixed with an engaging member which engages with a rear edge of a rim portion of the spare tire at the time of a rear collision of another vehicle. The vehicle body rear structure according to any one of claims 8 to 13. 10. The pair of rear floor side members have a front-rear position substantially the same as the rear edge of the rear wheel when the rear edge of the cross member is higher than the original position at the time of a rear collision of another vehicle. The vehicle body rear structure according to claim 5, wherein the vehicle body rear structure is configured to be deformed in a range in which the vehicle body moves. 11. The member extending in the vehicle lateral direction is a twist beam having a substantially U-shaped cross section opened toward the rear of the vehicle and disposed in front of and below the spare tire. The rear body structure according to claim 5, wherein the lower side portion extends rearward of the vehicle as compared with the upper side portion. 12. The spare tire according to claim 5, wherein a portion of said load transmitting means other than said spare tire has a shape substantially identical to a contour of said spare tire at a portion facing said spare tire. Rear body structure as described. 13. A vehicle body rear portion according to claim 5, wherein said member extending in the vehicle lateral direction has a spare tire receiving portion for receiving a front edge portion of said spare tire at the time of a rear collision of another vehicle. Construction. 14. A pair of rear floors including a pair of rear floor side members extending in the vehicle front-rear direction on both left and right sides of the vehicle, and a cross member connecting rear ends of the pair of rear floor side members. The rear structure of the vehicle body, wherein a rear part of the side member is located higher than a front part.