JPS5830875A - Rear construction of vehicle body - Google Patents

Abstract

PURPOSE:To increase strength of a vehicle against shock from the back by straightening rear side members, arranged on both sides of a rear floor panel, from the neighborhood of a wheel house protion to the rear end of a vehicle body while diverging said members toward the back of the vehicle body. CONSTITUTION:A rear panel 7 is approximately vertically mounted on the rear end of a rear floor panel 2, and on this rear panel 7 is mounted a bumper reinforce 9 through a trapezoindal bumper stay 8. Also rear side members 1 are formed stragiht from the neighborhood of a rear axle 12 interconnecting rear wheels 5 to the rear panel 7. The rear end of the rear side member 1 is mounted on the rear panel 7 through a flange 13 and both rear side members 1 are shaped to diverge from the neighborhood of the rear axle 12 toaward the rear panel 7. Thus, impact force from the back can be effectively absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to the rear part structure of the vehicle body, and more specifically to the rear side member structure disposed on both sides of the rear hemlock.

Conventionally, the structure of the iris species has been shown, for example, as shown in Iris 11H. According to this, rear passenger member 1
01 is Riya 7th Abanel 10! The wheel house 1 is arranged along both sides of the wheel house 1, and its rear end is attached to the shoulder of the wheel panel IH, almost redirecting its axle load.
In order to avoid interference with 04, they are formed in a curved manner. On the other hand, the rear side member 11010a has a bent portion K formed between the vicinity of the wheel house 104 and the rear end t of the vehicle body.

However, in this type of structure, when the rear end of the rear night member 101 receives an impact force directed toward the front C2 in the event of a tailgating accident, for example, a large load is applied to the bending part K. Therefore, in some cases, the portion near the bend IIK may break, and the absorption of impact energy may not be sufficient.

Therefore, in the case of the conventional structure, it is necessary to install different reinforcing members depending on whether the layer is broken or not, and there is a problem that it is necessary to install different reinforcing members when the weight increases as a whole.

This ridge provides a structure that can effectively support the impact force from the rear without having to reinforcing the rear umbrella, which is a problem with the conventional method. The rear side members installed on both sides of the wheel are formed in a straight line from the vicinity of the wheel house to the rear end of the vehicle body.
By opening the rear side members on both sides toward the rear of the vehicle body from the vicinity of the rear wheel house, the rear side members that are slid toward the rear of the rear wheel house are prevented from breaking midway due to stress concentration 4'-.

The present invention will be explained below based on the drawings. The second @ is a diagram showing the first embodiment of this invention. First, to explain the structure, a cross section)-shaped rear side support 1 is welded along both sides of a rear floor panel 20. A spare wheel nozzle 4 is formed on the rear floor panel 2 to accommodate a spare wheel 3 so as to be sandwiched between both rear side members 1. Further, a wheel house 6 is attached to both sides of the rear floor panel 20 in which two rear wheels S are housed.

Rear end C of rear floor panel 2: rear/(flannel 1 is approximately -
A bumper reinforcement 9 is attached to this lanyard (flannel 7) via a substantially trapezoidal panpasty 8.Furthermore, a shock absorbing part #10 made of urethane or the like is attached to the bumper reinforcement 91. A resin skin 11 is provided to cover the outside.

The rear side member 1 is formed in a straight line from the vicinity of the rear axle 12 that connects the rear wheel 5 to the rear panel 7t, and the rear end of the rear side member I is attached to the rear panel 7C via a seven-lunge brocade. Also, both rear side members 1 are arranged near the rear axle panel 71;
They are shaped so that they open from each other in the 9 directions.

In addition, near the spare wheel house 4! A foot 14 is attached, and both side members 1 are connected in the vicinity of the rear axle U by a cross-sectional cross-section cross-section member yht. A seatbelt anchor 16 on which the end of the seatbelt is attached is fixed to the rear 7 flange portion of the PS member 1s.

Next, the operation of the vote-embodiment will be explained.

For example, when an impact force is applied to the rear end of rear side member l in a real-speed accident, the portion of rear side member l that is straight in one axis direction will be pushed without a hitch due to the concentrated load due to self-moment. Only the force caused by crushing will work.

FIG. 3 shows a second embodiment of the present invention, in which the width of the rear night member 1 varies from the vicinity of the rear axle 12 to the rear panel 7.
(-It was formed so that it gradually widened in the opposite direction, and the sulfur volume gradually became hotter.

If the cross-sectional area is gradually changed by changing the width or height of the rear side member 1 as in this second embodiment, the rear end of the rear side member 1 (i.e., when an impact is applied, the rear end of the rear side member 1 will be pushed sequentially without breaking at an unexpected location). The crushing deformation is carried out at a place where the cross-sectional area changes, and the impact energy is effective l1111.
L is performed.

4 to 1116t show a second embodiment of the present invention. According to this, the outer seven flange IIIA of the wheel house portion C of the rear side member 1 is sharpened upward and the wheel house 6C is directly welded. At the same time, the rear part of the spare wheel house 4 is cut out and this part is connected directly to the rear panel 7.

As in the third embodiment (2 configurations), the rear side member 1 is straight from the vicinity of the rear axle 12 to the panel 7 so that a wider space can be secured.

In addition, as shown in Figure 6, ζ: R4 members! A seat belt anchor 16 is fixed along the rear 7 lunge 15 of the seat belt 5, and this seat belt anchor 16 is composed of an L-shaped reinforcement 17 and an oak 1g.

As explained above, according to the present invention, the rear side members disposed on both sides C of the rear 70 Abanel are arranged in a straight line from the vicinity of the wheel house part to the rear end of the vehicle body, and the rear side members are arranged in a straight line from the vicinity of the wheel house part to the rear of the vehicle body. Since the rear side members are shaped to open from each other, the impact energy applied to the rear end 62 of the vehicle body can be effectively absorbed without the rear side members breaking in the middle.

In addition, the rear side member undergoes deformation due to crushing instead of deformation due to bulge C: as in the conventional case, so that when the same material is used, there is a tendency to substantially increase the reaction force compared to the conventional case.

Furthermore, by gradually increasing the cross-sectional area of the rear side member from the vicinity of the wheel house toward the rear of the vehicle,
Since it is crushed and deformed at a location where the cross-sectional area changes without breaking, impact energy can be effectively absorbed.

In addition to the above embodiments, if the rear end of the rear side member is made of a thinner plate than the front part, a large impact energy will be stopped at the rear end, and the risk of unexpected breakage will be reduced. It has the effect of eliminating it.

[Brief explanation of the drawing]

$1111 is the back side of the rear of the vehicle body showing the arrangement of the conventional rear side member - 1 2nd WA is a back view of the main part showing the first embodiment of this invention, and IE3 is the back side of the rear side member when the cross-sectional area of the rear side member is gradually changed. Main part back view showing three embodiments, II
E4Ill is the main part showing the third embodiment of the invention of Hi,
m5aa is the 411th V-V'-New Cabinet, 6th Ill
is a sectional view taken along the line M-vt of the llIs diagram. 1... Rear side member, 2... Rear 70 Avanel, 6... Wheel house. Applicant Nissan Motor Co., Ltd. Figure 2 Figure 3

Claims (1)

[Scope of Claims] The cylindrical domes 3//( disposed on both sides of the No. Rear side C: Rear side members on both sides of the car body)/7 Claims 1. ASS of a car body of a spider according to claim 1, characterized in that the cross-sectional area is gradually increased.