JPS6211689B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rear bumper support structure.

Generally, the rear bumper located at the rear of the vehicle is
It is normally attached and supported at a certain legal ground clearance position via bumper stays, etc. to vehicle body strength members such as rear side members.
-Refer to Publication No. 10164).

Incidentally, in recent years, with the increase in front-engine front-wheel drive vehicles (hereinafter referred to as F/F vehicles), it is no longer necessary to install the rear wheel drive system at the rear of the vehicle, and the ground clearance at the rear of the vehicle, that is, the rear floor Now you can lower the height.

However, when supporting the rear bumper at the rear of the vehicle body of an F/F vehicle, the ground clearance of the rear floor becomes low, and the mounting ground clearance of the rear bumper is stipulated by law. The problem was that it had to be supported at a location higher than the rear floor. That is, since the rear panel is generally a thin panel that forms the outline of the vehicle body, there has been a problem in that the rear panel alone cannot provide sufficient strength to firmly support the rear bumper.

In order to solve this problem, as shown in FIG. 1, the rising parts 2a of a gusset-like rain force 2 are fixed to the left and right sides of the back surface of the rear panel 1, and the bottom part 2b of the rain force 2 is fixed to the rear floor 3. It is possible to ensure the support strength of the rear bumper B.

However, in the case of the rear bumper support structure of the F/F vehicle mentioned above, in the event of a rear collision of the vehicle,
Since the collision load input to the rear bumper B was configured to be transmitted to the rear floor 3 via the reinforcement 2, the rear part of the vehicle body was easily crushed and deformed.
It had a problem that was undesirable in terms of collision prevention.

This invention was devised in view of the current situation, and its purpose is to be able to firmly support a rear bumper on the rear panel, and to provide support to the rear part of the vehicle even when a collision load is applied to the rear bumper. The purpose of the present invention is to provide a support structure for a rear bumper that is effective as a countermeasure against collisions and can minimize collapse of the rear bumper and secure a survival space inside the vehicle.

In order to achieve this object, the present invention fixes the rear bumper at a portion of the rear panel above the rear floor, and fixes a reinforcing support member for the rear bumper at a position corresponding to the rear bumper on the back side of the rear panel. , both ends of the reinforcing support member are connected and fixed to a strength member on a side portion of the vehicle body.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

The automobile shown in FIG. 2 is a front-wheel drive vehicle, and the rear floor 3 has a lower ground clearance than the rear floor height of, for example, a front engine, rear wheel drive vehicle. A rear bumper B is disposed at the rear of the vehicle body where the rear floor 3 is thus set.

This rear bumper B is fixed to the rear panel 1, which is press-molded from a single thin plate, through a bracket (not shown) at a portion above the rear floor 3. A reinforcing support member 10 formed of a long material with a substantially U-shaped vertical cross section is horizontally welded and fixed to the back surface of the rear bumper B mounting area of the rear panel 1, and both ends of this reinforcing support member 10 are is further connected to the support member 11.

Like the reinforcing support member 10, this support member 11 is formed of an elongated member having a substantially U-shaped vertical cross section, and is welded and fixed to the rear engine inner panel 12, and one end of the supporting member 11 is attached to the reinforcing support member 10 as described above. Part 1
As shown in FIG. 3, the other end is connected to the joint between the rear wheel outer panel 13 and the rear wheel inner panel 14, which are the strength parts of the vehicle body. The reference numeral 15 in FIG. 2 indicates a spare tire storage chamber recessed in the rear floor 3.

Therefore, when a vehicle rear collision load is input to the rear bumper B supported as described above, this load is transmitted from the reinforcing support member 10 to the support member 11 and is transmitted to the rear wheel outer panel 13, which is a strong part of the vehicle body. Since the collision load is transmitted to the joint of the rear wheel inner panel 14, when the collision load is a light collision load, deformation of the rear part of the vehicle body can be effectively prevented, and even when the collision load is a heavy collision load, the deformation of the rear part of the vehicle body can be effectively prevented. Not only is this effective in preventing the living space in the vehicle interior from being narrowed due to crushing deformation, which is effective in terms of collision safety, but also the rear bumper B is supported by the reinforcing support member 10 and the support member 11. , even if each member 10, 11 is made lighter and smaller,
Sufficient support strength for the rear bumper B can be ensured, and the rigidity of the trunk room can also be improved.

In the above embodiment, the case where both ends of the reinforcing support member 10 are connected to the other end of the support member 11 formed by connecting one end to the joint between the rear wheel outer panel 13 and the rear wheel inner panel 14 is taken as an example. Although described above, in the present invention, the ends of the support member 11 or the reinforcing support member 10 may be connected to other vehicle body strength parts or members, such as the rear side member.

Since the present invention has the above configuration, it is possible to ensure the support strength of the rear bumper, and also to ensure sufficient strength of the rear part of the vehicle body in the event of a rear-end collision, and provides a rear bumper support structure particularly suitable for F/F vehicles. can.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view showing a rear bumper support structure in a conventional F/F vehicle, and FIG. 2 is a partially cutaway view of a rear bumper support structure in an F/F vehicle according to an embodiment of the present invention. FIG. 3 is a cutaway sectional view, and FIG. 3 is a perspective view showing a connected state of the support member in the vehicle body strength section. B...Rear bumper, 1...Rear panel, 3...
Rear floor, 10... Reinforcement support member, 11... Joint portion between rear wheel outer panel and rear wheel inner panel (vehicle body side portion).

Claims (1)

[Claims] 1. In a rear bumper support structure in which the rear bumper is fixed at a portion of the rear panel above the rear floor, and a reinforcing support member for the rear bumper is provided on the back side of the rear panel, the reinforcing support member is attached to the back side of the rear panel. A support structure for a rear bumper, characterized in that the reinforcing support member is fixed at a position corresponding to the rear bumper, and both ends of the reinforcing support member are connected and fixed to a strength member of a side portion of a vehicle body.