JPH0370652B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle bumper mounting structure.
In particular, the present invention relates to a bumper mounting structure for a vehicle in which the floor panel surface is located relatively below the center position of the bumper.

[Conventional technology]

If a rear bumper is used as an example of a conventional vehicle bumper mounting structure, there is one as shown in FIG. This is done by attaching a bumper skin 2 to a bumper reinforcement 1 to form a bumper B, securing a stay 4 to this bumper B with bolts 8, and connecting this stay 4 to a side member 5 of the vehicle with bolts 6. , the bumper B is attached to the vehicle body. In the figure, 7 indicates a floor panel to which the flange portion 5a of the side member 5 is attached, and 9 and 10 indicate a rear panel upper and a rear panel lower formed in the vertical direction from the rear end of the floor panel. A trunk room 11 is formed between the floor panel 7 and the rear panel top 9. (Refer to Japanese Utility Model Application No. 54-170551 for a similar structure.) [Problem to be solved by the invention] In the vehicle bumper mounting structure described above, the side member to which the stay is attached and the bumper are located at a predetermined relative position. Therefore, the position of the floor panel is also limited to a fixed positional relationship with respect to the bumper.

Incidentally, in recent years, there has been a demand for lowering the height of the floor panel in order to increase the storage capacity of trunk rooms. However, if the floor panel is lowered in this way, the side members will also inevitably be lowered, and in the case of the bumper mounting structure of conventional vehicles, the ground clearance of the bumper is limited, so it is difficult to mount the stay to the bumper. is relatively lower, making it impossible to ensure the mounting rigidity of the bumper in the event of a collision.

[Means for solving problems]

In the present invention, a side member mounting portion that is attached across both joining flanges of the side member is attached to a mounting member of a vehicle bumper mounting structure in which a bumper is attached to an end of a side member of a vehicle via an attachment member; and a bumper mounting portion which is bent at a substantially right angle from the side member mounting portion and has a surface perpendicular to the vehicle traveling direction.
A means for solving the above problem is a vehicle bumper mounting structure in which a bead is formed over the entire periphery.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the vehicle bumper attachment structure according to the present invention will be described below with reference to the drawings.

1 to 7 show embodiments of a vehicle bumper mounting structure according to the present invention. This embodiment shows a case where the present invention is applied to a rear bumper of a vehicle as in the conventional case, and the bumper B is attached to the rear end of the vehicle body. A rear side member 21 is provided at the rear end of the vehicle body and extends in the longitudinal direction of the vehicle body. A mounting flange 22 extends outward at the end. The mounting flange 22 is attached to a floor panel 23, and at the rear end of the floor panel 23, a rear panel upper 24 and a rear panel lower 25, which form the rear end surface of the vehicle body, are provided upward and downward. .

Here, the rear side member 21 and the floor panel 23 are positioned lower than in conventional vehicles to increase the storage capacity of the trunk room 26. Therefore, the mounting position of the bumper B with respect to the floor panel 23 is relatively elevated compared to the conventional bumper mounting structure, and the position of the rear side member 21 corresponds to the lower part of the bumper B.

The bumper B is formed of a bumper reinforcement 27 and a bumper skin 28, as in the conventional case, and is attached to the vehicle body. The bumper reinforcement 27 is attached to the vehicle body at two locations, upper and lower, with bolts 29 and 30, but the lower attachment is performed at the lower bumper attachment portion 25a of the rear panel lower 25, and this rear panel lower 25 is attached to the rear side member. 21 end to ensure the mounting strength of the bumper in the event of a collision.

On the other hand, in the upper part, bumper reinforcement 2
7 is a bolt 30 attached to one end of the mounting member 32 via the upper bumper mounting portion 24a of the rear upper panel 24.
The other end of the attachment member 32 is attached to the rear side member 21 by being co-tightened to the flange portion 22 of the rear side member 21 with bolts 31.

The mounting member 32 is shaped to extend over the rear upper panel 24 and the floor panel 23, and is composed of an outer panel 33 and an inner panel 34, which are joined by spot welding, as shown in FIGS. 2 to 7. This mounting member 32 is attached to both mounting flanges 22 of the rear side member 21 of the vehicle body in the vehicle width direction.
It is attached to rear side members 21 provided on both sides of the vehicle via a floor panel 23.

The outer panel 33 is formed with a bead 33b extending over the entire outer periphery so that the outer flange 33a at the end of the periphery faces the floor panel 23 side to which the rear side member 21 is joined and the rear panel top 24 side to which the bumper B is attached. The entire other part is formed into a curved shape, and as shown in FIGS. 3 and 6, the angle α formed by the tangents of the flat parts formed at the upper and lower center ends is approximately a right angle in accordance with the mounting angle of the bumper B. ing. The outer panel 33 has three rows of grooves 33c, 33f, and 33c oriented in the vertical direction, and are spaced apart according to the spacing between both mounting flanges 22 of the rear side member 21, as shown in FIGS. 3 and 4. Flat parts 33d and 33e are formed at the upper and lower ends of the grooved line 33c provided on both sides, and bolt insertion holes 37 and 38 are formed approximately in the center of these flat parts 33d and 33e. The angle β formed by these two flat parts 33d and 33e is approximately a right angle in accordance with the mounting angle of the bumper.

Further, the bottom surface of the groove 33f provided at the center is formed into a gentle arc shape, as shown in FIG.

As shown in FIG. 4, the inner panel 34 is a member made by bending a plate material at a substantially right angle and having a flange 34a erected on the entire outer periphery, and a flat surface facing the mounting flange 22 of the rear side member 21 on both sides of the lower end. A shaped side member attachment portion 34c is formed, and planar bumper attachment portions 34d that abut the upper bumper attachment portion 24a of the rear panel up 24 are formed on both sides of the upper end. The mounting flange 22 and the bumper B form an angle β' (see FIG. 5) corresponding to the mounting angle of the bumper B,
Plane portions 33d, 33 of the outer panel 33 described above
e and is fixed by spot welding. Bolt insertion holes 39 and 40 are formed in each of these parts at the same positions as the outer panel 33, and a protruding strip 34b is formed in the vertical direction between the bolt insertion holes 39 and 40. ing. Further, another protruding line 34e is formed between both of the protruding lines 34b, and as shown in FIG. It is fixed (indicated by * in Figure 4).

These outer panel 33 and inner panel 34
However, since the flange 34a of the inner panel 34 is located within the bead 33b of the outer panel 33, even if there is some manufacturing error in the height of the flange 34a, both the inner and outer panels Unlike when the outer peripheral edges of the flange 33 and 34 are butted together, the combination of the mounting member 32 is not disturbed, and the edges of the flange 34 are not touched by fingers, and the edges that are prone to rust are prevented. I can't see the side. Further, the outer flange 33a forming the bead 33b of the outer panel 33 covers the inner panel 34, and the edge thereof forms the bead 33b of the outer panel 33.
3. Since it is located near the rear panel top 24, even if this mounting member 32 is exposed inside the trunk 26, this outer flange 33a
Since the end face of the panel is not visible, the appearance quality can be maintained, and there is no risk of injury to hands or fingers even if they touch it.

Since this mounting member has a bead formed around the entire circumference and is fixed to both mounting flanges 22 of the rear side member 21, even if a load due to a collision is applied to the upper part of the bumper B, no load will be generated on the mounting part. It has mounting rigidity that is effective against torsional forces. In addition, this mounting member 32 and the mounting flange 22 of the rear side member
Also, the contact area of the bumper B with the bumper reinforcement 27 can be increased, allowing reliable fixing.

Therefore, according to this embodiment, the trunk room 26
Even if the position of the floor panel 23 is lowered relative to bumper B to expand the storage capacity of bumper B,
The mounting rigidity can be ensured.

Although this embodiment has been explained using a rear bumper as an example, it goes without saying that the present invention may also be applied to a front bumper. Further, the shape of the mounting member is not limited to this embodiment, and the mounting member may be formed of a single plate, for example.

〔Effect of the invention〕

As explained above, in the present invention, when a bumper is attached to a vehicle body, the bumper is attached to the vehicle body using a mounting member that is attached across both mounting flanges of a side member and has a bead on the entire periphery. , the bumper can be securely fixed to the vehicle body even when the floor panel is moved downward for purposes such as expanding the trunk space, and the mounting rigidity is effective against torsional displacement caused by loads on the top of the bumper. In addition, even if the mounting member is installed in the trunk, your fingers will not touch the edges, and the edges, which are prone to rust, will be difficult to see. This has the effect of maintaining good appearance quality.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a vehicle bumper mounting part showing an embodiment of the vehicle bumper mounting structure according to the present invention, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. FIG. 4 is an exploded perspective view of the mounting member shown in FIG. 3, and FIGS. 5 to 7 are lines from - to - in FIG. 3. FIG. 8 is a sectional view of a bumper mounting portion of a vehicle showing the structure of a conventional bumper mounting portion of a vehicle. 21...Rear side member (side member),
22...Mounting flange, 32...Mounting member, 33
...Outer panel, 33b...Bead, 34...
Inner panel, 34c...side member mounting part,
34d...Bumper mounting part.

Claims (1)

[Claims] 1. In a vehicle bumper mounting structure in which a bumper is attached to an end of a side member of a vehicle via a mounting member, the mounting member is a side member mounting portion that is mounted across both joining flanges of the side member. , and a bumper mounting part which is bent at a substantially right angle from the side member mounting part and has a surface perpendicular to the vehicle traveling direction, and the peripheral end thereof is on the side member side and the bumper side over the entire periphery. A bumper attachment structure for a vehicle, characterized in that a bead is formed to face the vehicle. 2. The mounting member is composed of an outer panel and an inner panel, and the end of the peripheral flange formed by standing the peripheral edge of the inner panel faces into the bead formed on the entire outer peripheral edge of the outer panel. A bumper attachment structure for a vehicle as set forth in claim 1.