JPS6225403Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bumper structure for an automobile.

The bumper of an automobile is usually connected and supported on both the left and right sides by stays to the frame of the vehicle body, etc.
(See Publication No. 112046, etc.)

Since the bumper is only supported at two points on the left and right, it is difficult to ensure vertical and torsional rigidity, especially at the center of the bumper, and it is also difficult to ensure that the bumper is strong enough in the event of a light collision at low speed. It can easily deform and damage equipment necessary for driving, making it impossible to drive.

The purpose of the present invention is to provide a bumper structure that can address the conventional problems as described above.
Embodiments will be described below with reference to the accompanying drawings.

The attached figure shows an example in which the present invention is applied to a rear bumper, and 1 is a bumper. Although not shown in the figure, the bumper 1 is connected to a frame, etc. via stays (or shock absorbers) etc. on the left and right sides as before. It is attached and supported on the vehicle body.

In the present invention, as shown in FIGS. 2 and 3, a collision energy absorbing member consisting of reinforcements 2, 3, etc. is provided on the inner surface of the central portion of the bumper 1, and the central portion of the bumper 1 is attached to a cross member by bolts 4, etc. It is connected to a vehicle body structural member such as No. 5.

The reinforcement 2 has a corrugated plate shape as shown in FIG. 5, for example, and the inner surface of the upper surface of the bumper 1 is arranged so that the ridge lines of the peaks 2a and valleys 2b are directed in the longitudinal direction of the vehicle body, as shown in FIGS. 2 and 3. The reinforcement member 2 is fixed by welding or the like, and the reinforcement member 2 is attached so that its front and rear end surfaces are in contact with or closely face the inner surface of the rear surface of the bumper 1 and vehicle body structural members such as the cross member 5, respectively.

Furthermore, as shown in FIG. 5, beads 2c are formed on the corrugated reinforcement 2 in the direction orthogonal to the ridge lines of the peaks and valleys, making the crushing strength in the longitudinal direction weaker than that of the body side, that is, the cross member 5. It has been done.

For example, as shown in FIG. 6, the reinforcement member 3 includes a horizontal surface portion 3a that is joined to the lower surface of the corrugated reinforcement member 2 and fixed by welding or the like, and an edge portion 3b that substantially follows the inner surface of the rear surface of the bumper 1. It is made of a substantially L-shaped plate material having a rib-shaped portion 3b having a shape of 1.0, and a bead 3c is formed to make the crushing strength in the front-rear direction weaker than that of the cross member 5.

The L-shaped reinforcement 3 has the horizontal surface portion 3a fixed to the lower surface of the corrugated reinforcement 2 by welding or the like as described above, and the rib-shaped portion 3
The end edge 3b' of the bumper 1 is fixed to the inner surface of the rear surface of the bumper 1 by welding or the like.

As shown in FIG. 4, in the center of the bumper 1, a flange portion 1a is formed at the edge of the upper surface portion to be joined to a vehicle body structural member such as a cross member 5. Then, it is connected to a vehicle body structural member such as a cross member 5 using a bolt 4 or the like.

Note that the connection of the central portion of the bumper to the cross member 5, etc. is achieved by connecting and fixing the reinforcement 2 fixed to the bumper 1 to a vehicle body structural member such as the cross member 5, instead of directly connecting the bumper as described above. It is also possible to have a configuration in which

Reinforcing members 5a are appropriately provided on vehicle body structural members such as the cross member 5 that face the vicinity of the central portion of the bumper to increase crushing strength.

In the figure, reference numeral 6 indicates a floor, and reference numeral 7 indicates a back door, and although the present invention is shown as an example applied to a rear bumper, it goes without saying that it can also be applied to a front bumper.

The present invention is based on reinforcements 2 and 3 as described above.
By providing a member which itself has a collision energy key absorption function on the inner surface of the central part of the bumper 1, and by adopting a structure in which the central part of the bumper 1 is directly or indirectly connected to a vehicle body structural member, the upper and lower parts of the bumper are The rigidity is improved, and the torsional rigidity of the bumper itself is significantly improved, making the cross-sectional shape of the bumper more stable.In addition, in the event of a collision, the reinforcement provided in the center of the bumper is first crushed and deformed, and then the vehicle body side members are crushed and deformed. Therefore, it is possible to significantly improve the absorption characteristics of the collision energy key, and furthermore, for example, 10
In the event of a light collision at low speeds of less than Km/H, the reinforcement provided in the center of the bumper prevents the bumper from deforming significantly and affecting driving performance, resulting in many excellent practical effects. It's something you get.

Further, according to the present invention, there is no vibration in the central part of the bumper when the vehicle is running, and the torsional rigidity of the vehicle body itself is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of a rear bumper section of an automobile to which the present invention is applied, and FIG. 2 is an enlarged detailed view of section A in FIG. 1, showing an embodiment of the present invention. FIG. 3 is a sectional view taken along line BB in FIG. 2. Figures 4, 5 and 6
The figure is a perspective view showing the vicinity of the central portion of the bumper, a corrugated plate-like reinforcement, and an L-shaped reinforcement in FIGS. 2 and 3, respectively. 1...Bumper, 2...Corrugated reinforcement, 3...L-shaped reinforcement, 2c, 3c
...Bead, 4...Bolt, 5...Cross member.

Claims (1)

[Scope of utility model registration request] In a bumper whose left and right sides are attached to a vehicle body member via stays, etc., a corrugated sheet-like plate is fixed to the inner surface of the upper surface of the bumper so that the ridge lines of peaks and valleys face in the longitudinal direction of the vehicle body, inside the central portion of the bumper. It consists of a reinforcement and a rib-shaped reinforcement that is fixed to the lower surface of the corrugated reinforcement and one end of which is fixed to the inner surface of the vertical wall of the bumper. In addition to fixing a collision energy absorbing member that is configured to have a bead in a direction perpendicular to the bumper and have a fracture strength in the longitudinal direction that is smaller than the fracture strength of a vehicle body structural member such as a cross member, the central part of the bumper A bumper structure for an automobile, characterized in that the bumper structure is coupled to a vehicle body structural member such as a cross member directly or via the collision energy absorbing member.