JPS606360Y2 - automotive bumper - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automobile bumper configured to prevent the bumper from tilting toward the vehicle body from its upper side due to an impact force at the time of an automobile collision.

Conventionally, as shown in FIG. 6, a bumper reinforcement 10 and a frame 11 correspond to each other by being offset in the vertical direction, and a soft fascia 12 forming the exterior surface of the bumper and the bumper reinforcement 10 correspond to each other. Between,
In order to absorb the impact energy at the time of a car collision, a honeycomb-structured buffer member 13 is interposed, and the back surface of the bumper reinforcement 10 is placed in contact with the frame 11 and the end surface of the bracket 14 fixed on the frame 11. Since the end face 13at13b of the buffer member 13 is formed flush with the upper and lower ends of the automobile bumper supported in contact with the bumper, the impact force Fx1 acting on the center line C1 at the time of a collision is applied as an eccentric load.

Therefore, the bumper turns and tilts toward the vehicle body from its upper side as shown by arrow A, causing the inconvenience of destroying the bracket 14.

This invention was made in view of the above points, and the object thereof is to provide a bumper for an automobile that does not turn from its upper side toward the vehicle body and tilt due to the impact force at the time of a car collision.

Embodiments of this invention will be described below with reference to the drawings.

FIG. 1 shows an exploded perspective view of an automobile bumper according to this invention, in which 1 is a soft fascia, 2 is a buffer member, 3 is a bumper reinforcement, 4 is a frame, and 5 is a vehicle body.

The soft fascia 1 is molded from polyurethane resin and consists of a center portion 1a and side portions 1b that are bent and connected in the direction of the vehicle body 5 on both sides of the center portion 1a.

The buffer member 2 is for absorbing impact energy at the time of a car collision, and includes a central buffer section 2a and a central buffer section 2a.
It consists of both side buffer parts 2b connected and fixed to both side ends of the cylinder, and is made of polyethylene resin so as to have almost uniform collision energy absorption characteristics from top to bottom as shown in Fig. 2 (for example, in a honeycomb shape as shown), and As is clear from FIG. 3, the lower end surface 7 is made to protrude more toward the soft fascia 1 than the upper end surface 6.

Bumper reinforcement 3 is made of reinforced plastic F
Molded by RP, mounting edges 3a, 3b on both upper and lower sides
It is formed as an extension.

The frame 4 is located behind the bumper reinforcement 3 and extends in the longitudinal direction of the vehicle body 5. The frame 4 is made of a steel plate processed into a groove shape, and is fixed to the vehicle body 5, as shown in FIG. A bracket 8 is mounted and fixed on the upper side of the tip, so that the tip surface 4a of the frame 4 and the bracket 8a are flush with each other.

The bumper reinforcement 3 corresponds to the frame 4 by being offset upwardly as shown in FIG.

That is, the lower rear surface of the bumper reinforcement 3 is fixed to the front end surface 4a of the frame 4, and the upper rear surface is fixed to the front end surface 8a of the bracket 8, so that the bumper reinforcement 3 is offset upward with respect to the frame 4. There is.

In addition, a buffer member 2 is inserted between the soft fascia 1 and the bumper reinforcement 3 that form the exterior surface of the bumper, and the buffer member 2 and the soft fascia 1 are fixed to the bumper reinforcement 3. There is.

In the above configuration, the buffer member 2 provided between the soft fascia 1 and the bumper reinforcement 3 has its lower end surface 7 directed toward the soft fascia, that is, toward the front in the case of a vehicle front bumper. In addition, in the case of the rear bumper of the vehicle body, since it is formed to protrude rearward, when an impact force shown by the arrow Fx in FIG. The component force arrow F1 and the arrow F2 satisfy F1>F2.

Therefore, the point of action of the resultant force F3 of F1 and F2 is at a position that is biased toward the component force F1 from the center line C as shown in the figure, and the moment of the eccentric load becomes small, so the bracket 8 Therefore, the bumper does not turn and tilt from the upper side toward the vehicle body 5 and destroy the bracket 8 as in the conventional case.

As explained above, this invention offsets the bumper reinforcement upward with respect to the vehicle body frame extending in the longitudinal direction of the vehicle body, fixes a bracket between the upper rear surface of the bumper reinforcement and the vehicle body frame,
A buffer member configured to have almost uniform collision energy absorption characteristics vertically is arranged between the soft fascia and the bumper reinforcement, and the lower end surface of this buffer member is made to protrude in the direction of the soft fascia more than the upper end surface. Since the bumper is formed in a manner similar to the above, there is an advantage that the bumper can be sufficiently supported by the bracket without turning and leaning toward the vehicle body from the upper side in the event of a collision of the automobile.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the bumper according to this invention, Fig. 2 is a front view of the buffer member, Fig. 3 is a vertical side view of the central part of the buffer member, Fig. 4 is a perspective view of the frame and bracket, and Fig. 5 The figure is a longitudinal sectional side view of the central portion of the bumper, and FIG. 6 is a longitudinal sectional view showing a conventional bumper. 1...Soft fascia, 2...°゛°buffer member, 3...Bumper reinforcement, 4
...Frame, 5...Vehicle body, 6...
... Upper end face of the buffer member, 7... Lower end face of the buffer member, 8... Bracket.

Claims (1)

[Scope of utility model registration request] The bumper reinforcement is located on the vehicle body side and offset upward with respect to the vehicle body frame that extends in the longitudinal direction of the vehicle body, and a bracket is fixed between the upper rear surface of this bumper reinforcement and the vehicle body frame, and the bumper reinforcement A buffer member configured to have almost uniform collision energy absorption characteristics vertically is arranged between the soft fascia forming the bumper reinforcement and the bumper reinforcement, and the lower end surface of the buffer member is arranged so that the lower end surface is lower than the upper end surface of the buffer member. An automobile bumper characterized in that it is formed so as to protrude in the direction.