JPH0528124Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement in the support structure of a vehicle bumper, particularly a front bumper.

[Prior Art] Conventionally, as a support structure for a front bumper of a vehicle such as an automobile, a bumper mounting portion is formed at the front end of a front side frame extending in the longitudinal direction of the vehicle, and the bumper is directly attached to this mounting portion. is known (for example, see Japanese Patent Application Laid-open No. 194135/1983).

In this way, by attaching the front bumper directly to the front end of the front side frame,
The impact force applied to the bumper when a vehicle has a head-on collision can be directly transmitted to the front side frame, and the impact energy at the time of the collision can be effectively absorbed by the front side frame and the front bumper.

When the front bumper is directly attached to the front end of the front side frame, for example, as shown in FIG.
The front end portion of the inner member 66 (front frame inner) and the front end portion of the outer member 67 (front frame outer) that constitute the front bumper 52 are located at the same position in the longitudinal direction of the vehicle, and thus form the rear part of the front bumper 52. The thickness of the part of the reinforcing member 55 (bumper reinforcement) facing the front frame inner 66 in the front-rear direction is considerably larger than that of other parts, that is, the attachment part 55a to the front frame inner 66 and the front frame The bumper reinforcement 55 is formed so that the attachment portion 55b to the outer 67 is located at the same longitudinal position, and the attachment portions 55a and 55b on the inner side and outer side of the bumper reinforcement 55 are attached to the front They are fastened and fixed to the front end portions of the frame inner 66 and front frame outer 67, respectively.

[Problem to be solved by the invention] However, when the rear part of the front bumper 52 (that is, the rear part of the bumper reinforcement 55) is formed as described above, the attachment part 55a to the front frame inner 66 is located on the engine room 60 side. The projecting portion 55a is
Usually, auxiliary equipment installed in the front part of the engine room 60 (for example, the condenser 6 of the air conditioner)
There is a problem of interference with the receiver tank 63 attached to 2).

In particular, in order to secure a relatively large cabin space with a compact body, the wheelbase is set relatively long and the part of the body in front of the front wheel axle (front overhang) is set short. In nose-type automobiles, the forward extension of the front part of the vehicle body is restricted, so when the front bumper is installed as described above, the front part of the engine room 60, where there is little room for the main body, is further extended on both sides. As a result, the receiver tank 6
There was a problem that it interfered with the installation of 3 etc.

This idea was created in view of the above problems, and when the front bumper is directly attached to the front end of the front side frame, it is possible to secure engine room space without extending the front part of the vehicle body forward. The purpose of the present invention is to provide a bumper support structure for a vehicle.

[Means for Solving the Problem] Therefore, this invention provides a support structure for a vehicle bumper that is attached to the front ends of a pair of left and right front side frames extending in the longitudinal direction of the vehicle, in which the front side frames are connected to the engine. It is composed of an inner member disposed on the room side and an outer member that covers the outside of the inner member, and the inner member extends forward by a predetermined amount compared to the outer member. The thickness in the longitudinal direction is substantially constant in the vehicle width direction, and the bumper is directly attached to the front end of the front side frame.

[Effect of the invention] According to this invention, the front frame inner extends forward by a predetermined amount compared to the front frame outer, so that the predetermined amount corresponds to the curved shape of the front bumper in the vehicle width direction. The thickness of the front bumper in the longitudinal direction of the vehicle is set appropriately, and the thickness of the front bumper in the longitudinal direction of the vehicle is set to be approximately constant in the vehicle width direction after ensuring the thickness necessary for the function of the bumper. The front bumper can be attached to the front end of the front side frame without extending the attachment part to the inner front frame backward.

As a result, the front bumper can be directly attached to the front end of the front side frame without extending the front part of the vehicle body forward and without particularly narrowing the front part of the engine room, and the front bumper can be directly attached to the front end of the front side frame. In addition to ensuring a high impact energy absorption effect in the event of a vehicle collision with the bumper, it also secures the necessary space in the engine room and allows the vehicle body to have a short nose.

[Example] Hereinafter, an example of this invention will be described in detail based on the accompanying drawings.

FIG. 4 is a perspective view of the front end of the vehicle 1 according to this embodiment. As shown in this figure, the front end of the vehicle 1 absorbs impact energy when a vehicle collides head-on. It is equipped with a front bumper 2 to reduce the impact on the vehicle body. The vehicle 1 is a so-called short-nose type vehicle in which the distance between the wheelbases is relatively long and the body part (front overhang) on the front side of the axle of the front wheels 9 is set short, and is compact. This allows a relatively large cabin space to be secured for the compact body of the vehicle.

As shown in FIGS. 1 and 2, the front bumper 2 includes an energy absorber 3 made of, for example, urethane resin, which absorbs impact energy when a vehicle has a head-on collision, and an energy absorber 3 on the front side of the energy absorber 3. For example, a bumper skin member 4 made of plastic that covers the
and a bumper reinforcement 5 made of a steel plate that is disposed on the rear side of the energy absorber 3 and reinforces the bumper 2, and the bumper reinforcement 5, the energy absorber 3, and the The energy absorber 3 and the bumper skin member 4 are:
Each is firmly bonded to each other with adhesive.

In addition, in front of the shroud panel 11 disposed at the front of the engine room 10, a condenser 12 for cooling and condensing the gas refrigerant of the on-board air conditioner is installed.
A receiver tank 13 is attached to the side of the condenser 12 to temporarily store the cooled and condensed refrigerant. Furthermore, a radiator 14 (first
(see figure) are arranged.

A pair of left and right front side frames 15, 15 extending in the longitudinal direction of the vehicle body are provided on the left and right sides of the engine room 10, and the front side frames 15, 15 extend forward of the shroud panel 11. The rear part of the bumper 2, that is, the rear part of the bumper reinforcement 5 is directly attached to the front ends of the left and right front side frames 15, 15. The mounting position of the front bumper 2 in the vertical direction is set so that the vertical center line is located in substantially the same horizontal plane as the longitudinal center line of the front side frames 15, 15, and the vehicle The impact force applied to the front bumper 2 during a head-on collision is directly and efficiently transmitted to the front side frames 15, 15, and the impact energy is more effectively absorbed by the front side frames 15, 15 and the front bumper 2. It is now possible to do so.

Taking the left side frame as an example, the front side frames 15, 15 include an inner member 16 (front frame inner) disposed on the engine compartment 10 side, as shown in detail in FIG. Outer member 17 (front frame outer) that covers the outside of the front frame inner 16
Both the front frame inner 16 and front frame outer 17 are formed of pressed steel plates, and the front ends thereof have mounting flanges 16a and 17a for mounting the bumper 2. Each is integrally formed.

On the other hand, the bumper reinforcement 5 is
Inner member 6 (bumper rain inner) disposed on the engine room 10 side and directly attached to the front side frames 15, 15
and an outer member 7 (bumper rain outer) that covers the outside of the bumper rain inner 6 and is adhesively fixed to the rear surface of the energy absorber 3, and these bumper rain inner 6 and bumper rain outer 7, Both are made of pressed steel plates, and both define a closed space. The bumper rain inner 6 is provided with weld bolts 19, .
..., 19 are welded, and the bumper reinforcement 5 is fastened and fixed to the front side frames 15, 15 by these weld bolts 19, ..., 19.

In this embodiment, when the front bumper 2 is attached to the front ends of the front side frames 15, 15, the left and right sides of the front part of the engine room 10 are narrowed, and for example, the receiver tank 13 is narrowed.
In order to prevent the installation of auxiliary equipment such as has been done. On the other hand, the attachment portion 6a of the bumper rain inner 6 to the front frame inner 16 is attached to the front frame outer 1.
It is formed so as to be positioned forward of the mounting portion 6b for 7 by the predetermined amount.

The predetermined amount is determined in accordance with the curved shape of the rear part of the front bumper 2 in the vehicle width direction (see the dashed line in FIG. 1), and the thickness t of the bumper reinforcement 5 in the vehicle longitudinal direction, i.e. The longitudinal thickness T of the bumper 2 is set to be substantially constant in the vehicle width direction while ensuring the required thickness. That is, bumper reinforcement 5
Attachment part 6a to the front frame inner 16 of
The bumper reinforcement 5 is set so that it does not protrude significantly rearward as in the conventional case, and the thickness in the longitudinal direction at this portion can ensure the thickness necessary for the function of the bumper reinforcement 5. .

As described above, according to this embodiment, the front frame inner 16 is extended forward by a predetermined amount compared to the front frame outer 17, so that the predetermined amount is extended to the rear of the front bumper 2. The thickness T of the front bumper 2 in the longitudinal direction of the vehicle is set appropriately in accordance with the curved shape in the vehicle width direction, and the thickness T is approximately constant in the vehicle width direction after securing the thickness T required for the function of the bumper 2. By setting so that be able to.

As a result, the front bumper 2 can be directly attached to the front ends of the front side frames 15, 15 without extending the front part of the vehicle body forward and without particularly narrowing the front part of the engine room 10. The front side frames 15, 15 and the front bumper 2 ensure a high impact energy absorption effect in the event of a vehicle collision, and the necessary space for the engine compartment 10 can be secured to realize a short nose structure of the vehicle body 1. .

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view taken in the direction A-A in FIG. 4 for explaining the mounting part of the front bumper according to the embodiment of the present invention, and FIG. FIG. 3 is an exploded perspective view of the front side frame and the mounting portion of the bumper reinforcement according to the above embodiment. FIG. 4 is an exploded perspective view of the front side of the vehicle body according to the above embodiment. The perspective view and FIG. 5 are partial cross-sectional explanatory views for explaining a mounting portion of a front bumper according to a conventional example. 1...Car, 2...Front bumper, 5...
Bumper reinforcement, 6...Bumper rain inner, 10...Engine room, 15...Front side frame, 16...Front frame inner, 17...Front frame outer.

Claims (1)

[Scope of Claim for Utility Model Registration] A support structure for a vehicle bumper attached to the front ends of a pair of left and right front side frames extending in the longitudinal direction of a vehicle, the front side frames being arranged on the engine compartment side. It is composed of an inner member and an outer member that covers the outside of the inner member, and the inner member extends forward by a predetermined amount compared to the outer member, and the thickness of the bumper in the longitudinal direction of the vehicle is A bumper support structure for a vehicle, characterized in that the bumper is formed substantially uniformly in the vehicle width direction, and the bumper is directly attached to the front end of the front side frame.