JP3339127B2 - Mounting structure of bumper reinforcing member and mounting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a bumper reinforcing member when a bumper system is incorporated into a front end module connected to a vehicle body, and a mounting method thereof.

[0002]

2. Description of the Related Art Conventionally, as a body front structure to which a bumper is attached, for example, April 20, 1980, Sankaido Co., Ltd.
There is something like that described in.

FIG. 6 is a perspective view of a vehicle body front structure, and FIG.
Is a side sectional view. The radiator core support 1 has a vehicle exterior component mounted on the front side, such as a headlamp mounted on a lamp mounting portion 5 formed on the front surface at both left and right ends. The radiator core support 1 has an upper portion attached to a hood ridge panel (not shown) on the vehicle body at both ends in the vehicle width direction, and a lower portion attached to a first cross member 9 connecting the left and right side members 7 on the vehicle body.

When the radiator core support 1 is attached to the vehicle body, the front ends of the left and right side members 7 are
A bumper reinforce 13 constituting a bumper reinforcing member is fixed via a bump pasty 11. A bumper fascia 15 serving as a bumper main body disposed in front of the bumper reinforce 13 is mounted on the vehicle body main body via a bumper mounting member 17 having an upper surface fixed to an upper portion of the bumper stay 11, and is disposed in the vehicle width direction. Both end surfaces on the rear side of the vehicle body are mounted on a front fender on the vehicle body via a bumper mounting member 19.

In such a structure of the front part of the vehicle body, at the time of a light collision of the vehicle, the collision energy is absorbed by the elastic deformation of the bumper reinforce 13 and the bumper fascia 15. The law stipulates that no damage should occur during such a light collision except for the bumper system including the bumper reinforce 13 and the bumper fascia 15 (Sankaido Co., Ltd. issued April 20, 1980. Encyclopedia of Engineering, "Automobile Regulations,
Standards, statistics ”).

[0006]

In recent years, a radiator core support is integrally formed of, for example, resin to constitute a base of a front end module, and the front end module is mounted with a headlamp or a radiator grill on a vehicle body. A structure that is mounted on a vehicle and fastened and connected has been developed.

[0007] In such a front-end module,
When the above-described bumper system is incorporated, it is necessary to fix the bumper reinforce together with the bumper fascia to the radiator core support.

However, if the bumper reinforce is fixed to the radiator core support, the above-mentioned vehicle may be damaged at a light collision by damping the radiator core support other than the bumper system due to the bending deformation of the bumper reinforce. Therefore, the radiator core support needs to be provided with reinforcing ribs in order to secure rigidity, which may cause problems such as a complicated structure and an increase in component weight.

In view of the above, according to the present invention, when a bumper system is incorporated into a front end module connected to a vehicle body, even if a bumper reinforcing member is bent at the time of a light collision of a vehicle, damage to a radiator core support is increased without increasing rigidity. The purpose is to prevent.

[0010]

According to one aspect of the present invention, there is provided a radiator which is a base of a front end module connected to a front portion of a vehicle body, in which a bumper main body and a bumper reinforcing member are provided separately. The bumper reinforcing member is interposed between the core support and the bumper main body, and the bumper main body is fixed to a bumper mounting portion provided on the radiator core support and protruding forward of the vehicle body and extending in the vehicle width direction. The bumper reinforcing member has both ends fixed to the front end of the front side member, and is attached to a bumper reinforcing member mounting flange provided on the radiator core support and formed to project forward of the vehicle body. Is configured to be movable in the vehicle longitudinal direction along the bumper reinforcing member mounting flange.

According to a second aspect of the present invention, the bumper main body and the bumper reinforcing member are provided separately, and are interposed between a radiator core support serving as a base of a front end module connected to a front portion of the vehicle body and the bumper main body. The bumper reinforcement member is fixed to the front end of the front side member at both ends thereof, and is moved in the vehicle longitudinal direction at a light collision with a bumper reinforcement member mounting flange provided on the radiator core support and protruding forward of the vehicle body. The mounting method is such that the bumper body is fixed to a bumper mounting portion provided on the radiator core support and protruding forward of the vehicle body and extending in the vehicle width direction.

[0012]

According to the structure of the first aspect of the invention or the method of the second aspect of the present invention, when the bumper reinforcing member and the bumper reinforcing member are bent toward the rear side of the vehicle due to collision energy during a light collision of the vehicle, the bumper reinforcing member is provided. In the state in which both ends are fixed to the front side members, the radiator core support moves to the rear side of the vehicle body with respect to the bumper reinforcing member mounting flange projecting forward of the vehicle body, thereby avoiding damage to the radiator core support.

[0013]

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

FIG. 1 is an exploded perspective view of a vehicle body front structure showing an embodiment of the present invention, and FIG. 2 is a side sectional view of the vehicle body front part. In the vehicle body front structure, a front end module 23 based on a radiator core support 21 is mounted on a vehicle body 5 and fastened and connected thereto. The radiator core support 21 is integrally formed of resin, and has a lamp mounting portion 25 to which a headlamp is mounted on the front surfaces at both ends in the vehicle width direction, and a lock mounting portion 27 to which a hood lock is mounted on the center front surface. For example, a vehicle exterior component is mounted.

The upper portion of the radiator core support 21 constitutes a radiator core upper 29, and both ends in the vehicle width direction of the radiator core upper 29 are bent rearward of the vehicle body to form a mounting flange 31. Hood ridge panels 33 on both sides of vehicle body 5 in the vehicle width direction
It is attached to the upper attachment part 35. The lower part of the radiator core support 21 constitutes a radiator core lower 37, and the radiator core lower 37 is attached to the front surface of the front cross member 39 on the vehicle body 5 side. Both ends in the vehicle width direction of the front cross member 39 are fixed to the front end side surface of the front side member 41 by welding.

A lower portion of the radiator core upper 29 is formed with a bumper mounting portion 43 extending forward in the vehicle width direction, and is mounted on an upper surface of the bumper mounting portion 43 at an upper portion of a bumper fascia 45 as a bumper body. The lower surfaces of the portions 47 are joined and fixed by bolts 49. The mounting portion 51 at the lower portion of the bumper fascia 45 has its upper surface joined to the lower surface of the radiator core lower 37 and is fixed by bolts 53.

Between the bumper fascia 45 and the radiator core support 21, a bumper reinforce 55 as a bumper reinforcing member constituting a front bumper with the bumper fascia 45 is disposed. The bumper reinforce 55 is extended in the vehicle width direction, and has an upper surface 55a and a lower surface 5a.
5b and a front surface 55c, and has a U-shaped cross section in which the rear side of the vehicle body is open, and portions of the vehicle body rear side at both ends in the vehicle width direction are connected to the front side member 4 via bumper stays 57.
1 is attached to the front end.

The bump pasty 57 is, as shown in FIG.
The bumper reinforce 55 has a U-shaped cross section that is open, and its upper surface 57a and lower surface 57b are welded and fixed inside the upper surface 55a and lower surface 55b of the bumper reinforce 55. Two mounting holes 57 d are formed in the rear surface 57 c of the bump pasty 57, and the mounting holes 57 d are inserted into stud bolts 59 provided at the front end of the front side member 41. An opening 61 is formed in the front surface 55c of the bumper reinforce 55 at a position corresponding to the front of the stud bolt 59, and an opening in which the combination lamp 63 is mounted is provided in the bumper fascia 45 at a position facing the opening 61. A hole 65 is formed. The nut 69 is fastened to the stud bolt 59 by the nut runner 67 through the opening 65 and the opening 61. When the combination lamp 63 is not provided at a position corresponding to the stud bolt 59, an opening for exclusive use of the nut runner 67 may be formed, and closed after use by a blind lid.

The radiator core lower 37 of the radiator core support 21 and the bumper mounting portion 43 are connected by a connecting portion 71 extending vertically at both ends in the vehicle width direction, and a central portion is connected by a hood lock support 73. It is integrated. An upper mounting flange 75 as a bumper reinforcing member mounting flange to which the upper surface 55a of the bumper reinforce 55 is movably mounted in the front-rear direction of the vehicle body is formed on an upper side of the left and right connecting portions 71 so as to protrude forward. On the side, a lower guide flange 77 for guiding the lower surface 55b of the bumper reinforce 55 is formed to protrude forward.

As shown in FIG. 3, a mounting hole 75a is formed at the tip of the mounting flange 75, while a mounting hole 79 is also formed on the upper surface of the bumper reinforce 55. Then, the clip 81 is inserted and the two are joined. At this time, a predetermined gap α is formed between the clip 81 and the edge of the mounting hole 79 of the bumper reinforce 55 on the vehicle body front side.

The lower guide flange 77 is formed with a through hole 77a into which a downward projection 55d formed at the tip of the lower surface 55b of the bumper reinforce 55 is inserted. The space of the dimension α is also provided between the projection 55d of the bumper reinforce 55 and the edge of the through hole 77a of the lower guide flange 77 on the vehicle body rear side.

In this manner, the radiator core support 2
The bumper reinforce 55 attached to 1 is in a state capable of moving by a dimension α toward the rear of the vehicle body with respect to the radiator core support 21. In this state, the bumper reinforce 55 is temporarily fixed to the radiator core support 21 and is taken into the front end module 23 together with the bumper fascia 45.

The dimension α is larger than the amount of elastic deformation of the bumper reinforce 55 during a light collision of the vehicle, that is, the amount of movement of the bumper reinforce 55 toward the rear of the vehicle.

A radiator grill 85 attached to the radiator core support 21 is provided above the bumper fascia 45.
A radiator unit including a condenser 87, a radiator 89, and the like is disposed behind the radiator core support 21 in the vehicle body. The radiator unit has a lower portion fixed to the first cross member 39 and an upper portion fixed to a stay 90 projecting upward at the rear side of the vehicle body near both ends of the first cross member 39 in the vehicle width direction. The upper part of the engine room in which the radiator unit is stored is covered with a hood 91.

In the vehicle body front structure as described above, the bumper fascia 45 receives an impact from the front during a light collision of the vehicle,
When the bumper reinforce 55 receives an impact force F from the front as shown in FIG. 5 which is a plan view of the mounted state, the bumper reinforce 55 bends toward the rear of the vehicle body, and the Is moved from the normal position at the position indicated by the two-dot chain line. Here, the amount of rearward movement of the bumper reinforce 55 at the portion where the bumper reinforce 55 is temporarily fixed to the radiator core support 21 is defined as β (<α).

On the other hand, as shown in FIGS. 3 and 2, between the clip 81 and the mounting hole 79 between the bumper reinforce 55 and the upper mounting flange 75 of the radiator core support 21, and the protrusion 55 of the bumper reinforce 55
d and the through hole 77a of the lower guide flange 77,
Since the interval of the dimension α is ensured, the movement of the bumper reinforce 55 is absorbed by the dimension α, and even if the bumper reinforce 55 is bent, damage to the radiator core support 21 is avoided. For this reason, the radiator core support 21 does not need to provide a reinforcing rib in order to secure rigidity, and does not complicate the structure and increase the weight of parts. As a result, it is possible to comply with the rule that there should be no damage other than the bumper system during a light collision.

[0027]

As described above, according to the present invention, when a structure in which a bumper reinforcing member attached to a vehicle body is incorporated into a front end module based on a radiator core support together with the bumper body is employed. The reinforcing member is separate from the bumper main body and is mounted movably in the front-rear direction of the vehicle on the bumper reinforcing member mounting flange projecting forward from the vehicle body of the radiator core support. Even if the bumper reinforcing member is bent rearward due to the collision energy, the bumper reinforcing member moves rearward with respect to the radiator core support, so that damage to the radiator core support is avoided. For this reason, the radiator core support does not require the provision of reinforcing ribs for securing rigidity, and does not cause a complicated structure and an increase in component weight.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a vehicle body front structure showing an embodiment of the present invention.

FIG. 2 is a side sectional view of the vehicle body front structure shown in FIG. 1;

FIG. 3 is an enlarged detailed view of a main part of FIG. 2;

FIG. 4 is a side sectional view showing a method of fixing a bumper reinforce to a vehicle body side in the vehicle body front structure of FIG. 1;

FIG. 5 is a plan view showing a bending movement state when a bumper reinforce in the vehicle body front structure of FIG. 1 receives an impact.

FIG. 6 is an exploded perspective view of a vehicle body front structure showing a conventional example.

FIG. 7 is a side sectional view of a mounting portion of the bumper reinforce to the vehicle body in the vehicle body front structure shown in FIG. 6;

[Explanation of symbols]

 21 radiator core support 23 front end module 41 front side member 45 bumper fascia (bumper body) 55 bumper reinforce (bumper reinforcing member)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62D 25/08 B60R 19/24

Claims (2)

(57) [Claims] 1. A bumper main body and a bumper reinforcing member are separated from each other, and the bumper reinforcing member is interposed between a radiator core support serving as a base of a front end module coupled to a front part of a vehicle body and the bumper main body. The bumper main body is fixed to a bumper mounting portion provided on a radiator core support and protruding forward of the vehicle body and extending in the vehicle width direction, and the bumper reinforcing member fixes near both ends to a front end of a front side member. At the same time, it is attached to a bumper reinforcing member mounting flange provided on the radiator core support and protruding forward of the vehicle body, and in a light collision, the bumper reinforcing member is movable in the vehicle longitudinal direction along the bumper reinforcing member mounting flange. A mounting structure for a bumper reinforcing member. 2. A bumper main body and a bumper reinforcing member are separated from each other, and the bumper reinforcing member interposed between the radiator core support serving as a base of a front end module coupled to a front portion of the vehicle body and the bumper main body is provided. , While fixing both ends near the front end of the front side member,
Attached to the bumper reinforcing member mounting flange formed on the radiator core support and protruding forward of the vehicle body so as to be movable in the front-rear direction of the vehicle at the time of a light collision, A method for mounting a bumper reinforcing member, wherein the bumper reinforcing member is fixed to a protruding bumper mounting portion extending in the vehicle width direction.