JP2001294107A - Bumper beam mounting structure - Google Patents

Abstract

(57) Abstract: Provided is a bumper beam mounting structure capable of preventing a stay supporting a bumper beam from being broken or deformed near a mounting portion with a vehicle body in a collision. The stay includes a stay inserted from one end of the body frame into the frame, and a bumper beam fixed to the other end of the stay. The stay is at least one surface of an inner wall of the body frame. And at least the other end of the stay and the vehicle body are fixed by a fixing member 5 near the joint between the stay and the bumper beam. Mounting structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to
The present invention relates to a bumper beam mounting structure that can prevent a stay supporting a bumper beam from being broken or deformed near a mounting portion with a vehicle body.

[0002]

2. Description of the Related Art As a conventional bumper beam mounting structure, there is one described in Japanese Patent Application Laid-Open No. 9-86309. The stay of the bumper beam described in this publication is
As shown in FIG. 5, the box-shaped main body 21 and the bumper beam 2
6 and a body frame 24
Holding portions 23a and 23b for holding the body frame 2 from above and below, and the body frame 2 is held by the holding portions 23a and 23b.
The bolt 25 is penetrated above and below the body frame with the pinch 4 held therebetween, and is fixed by tightening with a nut 27. With this configuration, the protrusion 22
And the box-shaped main body 21 are crushed to absorb energy in the initial stage of the collision, and the mounting portion by the bolt 25 does not hinder the buckling of the body frame, and the body frame 24 is buckled and deformed in a well-balanced manner. And collision energy can be effectively absorbed. As shown in FIG. 6, a stay 32 attached to a bumper beam 31 is provided with a body frame 3 having a tubular cross section.
A bumper beam mounting structure which is inserted into the frame from the end of No. 3 and fixed by bolts 34 is also well known.

[0003]

However, in the bumper beam mounting structure described in the above publication, the collision energy can be effectively absorbed, but the shape of the stay itself is complicated, and it is difficult to manufacture it at low cost. . Although the bumper beam mounting structure shown in FIG. 6 has advantages such as a simple configuration, the input of collision energy is limited to the fixing portion 34 of the frame 33 and the stay 32 during a collision. However, there are inconveniences such as that the frame 33 is easily deformed and the frame 33 is broken at the time of a large collision.

[0004] Therefore, the present invention increases the number of mounting points of the bumper beam, thereby dispersing the collision energy to the vehicle body and simultaneously inputting it to the center of the vehicle body frame. An object of the present invention is to provide a bumper beam mounting structure capable of obtaining a good deformation mode, and to solve the above problems.

[0005]

For this reason, the technical solution adopted by the present invention comprises a stay inserted from one end of the body frame into the frame, and a bumper beam fixed to the other end of the stay. The stay is fixed to at least one surface side of the inner wall of the vehicle body frame, and at least in the vicinity of a joint between the stay and the bumper beam, at least the other end of the bumper beam or the stay is configured to be fixed to the vehicle body. And a bumper beam mounting structure. Further, the vehicle body frame has a bumper beam mounting structure, which has a tubular cross section. Further, a locking portion is provided above a rear end of the body frame, and a bracket is provided near a joint between the stay and the bumper beam, so that the locking portion and the bracket are fixed. It is a bumper beam mounting structure. Further, the vehicle body frame has a U-shaped cross section, and includes a cover plate that covers the U-shaped open portion, a locking portion is erected at a rear end of the cover plate, and the bumper beam or the other end of the stay is provided. A bracket is provided in the vicinity of the coupling portion on the side, and the locking portion and the bracket are fixed to each other to provide a bumper beam mounting structure. Further, the body frame has a shape capable of inserting and holding the stay, and includes an engagement portion on an inner peripheral surface of the body frame insertion portion.The stay has a stay inserted into the body frame, A bumper beam mounting structure, comprising: an engaged portion that engages with the engaging portion. Further, the engaging portion formed on the inner peripheral surface of the vehicle body frame inserting portion and the engaged portion engaged with the engaging portion are configured to be fixed by temporary fixing means. It is a bumper beam mounting structure.

[0006]

FIG. 1 is a perspective view of a bumper beam with a stay and a fixing member (bracket) according to a first embodiment attached thereto, and FIG. 1 is a sectional view taken along the line AA in FIG. 1 and is a view in which a bumper beam is temporarily fixed in order to attach the bumper beam to a vehicle body side frame. FIG. 3 is a sectional view similar to FIG. is there.

In FIG. 1, reference numeral 1 denotes a bumper beam;
Stays 2 are fixed to the left and right of the bumper beam 1. The stay 2 has a cross section that can be inserted into a tubular frame 3 provided on the vehicle body side. Further, the stay 2 is provided with a plurality of nuts 4 for screwing bolts for fixing the stay and the frame. . Also, near the mounting position of the stay of the bumper beam 1, the side of the bumper beam or the stay 2
A bracket 5 as a fixing member that can fix the vehicle body and the bumper beam 1 is attached to the side. The bracket 5 has a contact surface 6 that is in contact with the rear surface of the vehicle body, and a bolt insertion hole 7 that fixes the vehicle body to the bracket 5 is formed in the contact surface 6. A hole 8 is formed on the vehicle body corresponding to the insertion hole 7 of the placket 5.

An engaging portion 3A is formed on the inner peripheral surface near the end of the frame 3, and an engaged portion 2A that engages with the engaging portion 3A is formed on the stay 2 side. A temporary fixing screw 9 for temporarily fixing the stay 2 and the frame 3 is provided on the engaging portion 3A and the engaged portion 2A so that the work for attaching the bumper beam 1 to the frame can be easily performed. Are configured to be attachable. Note that the engaging portion and the engaged portion formed on the frame 3 and the stay 2 are not surfaces as shown in the drawing, but include a hole and a projection fitted into the hole, and are in a form capable of positioning both. If so, it may have another shape. When the stay 2 is assembled to the frame, a bolt insertion hole 10 is formed in the frame 3 at a position corresponding to the nut 4 provided on the stay 2. The bumper beam 1 configured as described above,
As shown in FIG. 2, when the stay 2 is inserted into the frame 3 on the vehicle body side, the engaging portion 3A formed on the frame 3 and the engaged portion 2A formed on the stay 2 come into contact with each other. The stay is temporarily fixed to the vehicle body frame by the temporary fixing screw 9.
Then, from this state, the bumper beam 1 is moved upward as shown in FIG.
1 and the stay 2 and the frame 3 are connected by bolts 12.

In the bumper beam 1 thus mounted, the frame 3 and the stay 2 are fixed by the bolts 12 and the bracket 5 and the vehicle body are fixed by the bolts 11. It is possible to input, a deformation mode with good energy absorption is obtained, and safety is improved. Further, during the mounting operation, the stay 2 and the vehicle body frame 3 can be fixed after the bumper beam 1 is moved upward from the temporarily fixed state to fix the bracket 5 and the vehicle body. The mounting hole position can be automatically obtained with high accuracy, and the assembling work becomes easy.

Next, a second embodiment will be described.
The same members as those in the first embodiment are denoted by the same reference numerals. In the second embodiment, a cover plate is provided above a rear end of the vehicle body frame, an engaging portion is erected on the cover plate, and a bracket is provided near a joint between the stay and the bumper beam. It is characterized in that the locking portion and the bracket formed in the above are fixed by fixing means such as bolts. In FIG. 4, reference numeral 1 denotes a bumper beam, and stays 2 are fixed to the left and right of the bumper beam 1. The stay 2 has a cross section that can be inserted into a U-shaped frame 3 provided on the vehicle body side, and the stay 2 has a plurality of nuts 4 to which bolts for fixing the stay and the frame are screwed. Attached. A bracket 5 that can be fixed to a locking portion 14 formed on a cover plate 13 described later is mounted on the bumper beam side or the stay 2 side near the mounting position of the stay of the bumper beam 1. The bracket 5 has an abutment surface 6 that abuts on the locking portion 14, and a bolt insertion hole 7 is formed in the abutment surface 6.

[0011] In the frame 3, the stay 2 is replaced with the frame 3.
The bolt insertion hole 10 is formed at a position corresponding to the nut 4 provided on the stay 2 when assembled. Further, a cover plate 13 for closing the opening is attached to the frame 3 by appropriate means such as screws.
An engaging portion 14 is integrally formed on the 3 at a position facing the contact surface 6, and a nut 15 is fixed to the engaging portion 14. In the bumper beam 1 configured as described above, the stay 2 is inserted into the frame 3 on the vehicle body side, the bumper beam 1 is further moved upward, and the bolt 5 is brought into contact with the bracket 5 and the locking portion 14. 11 is fixed to the nut 15 by fastening, and the stay 2 and the frame 3 are connected by a bolt (not shown).

In the bumper beam 1 thus mounted, the frame 3 and the stay 2 are fixed by bolts, and the brackets 5 and the locking portions 14 provided on the cover plate 13 are fixed by bolts 11. Can be input above and below the bumper beam 1, a deformation mode with good energy absorption is obtained, and safety is improved. In the second embodiment, the bracket 5 is attached to the cover plate 1.
Since the structure for fixing to the locking portion 14 formed in the fourth embodiment is adopted, it is not necessary to form the hole 8 on the vehicle body side as in the first embodiment. The locking portion is not limited to the cover plate, but can be formed directly on the rear end of the frame by changing the shape of the rear portion of the frame. Also, needless to say, in the second embodiment, similarly to the first embodiment, an engaging portion for positioning and an engaged portion can be formed. In this case, a temporary fixing screw can be attached.

Although the embodiment of the present invention has been described above, in the above embodiment, the stay and the body frame are fixed below the vehicle body, but the frame and the stay can be fixed laterally and upwardly. It is. Also, the mounting position of the bracket to the bumper beam or the stay can be changed to an effective position in accordance with the fixed position between the stay and the body frame. Furthermore, the present invention may be embodied in any other form without departing from its spirit or essential characteristics. Therefore, the above-described embodiment is merely an example in all aspects and should not be interpreted in a limited manner.

[0014]

As described in detail above, according to the present invention, a deformation mode having a good energy absorption efficiency at the time of a large collision can be obtained, and a safe, lightweight, and inexpensive mounting structure can be provided.
Since the frame and stay are fixed with bolts and the bracket and vehicle body are fixed with the bumper beam, the energy at the time of collision can be input to the top and bottom of the bumper beam, so a deformation mode with good energy absorption is obtained, and safety is improved. Is improved. Also, since the bracket and the vehicle body can be fixed from the temporary fixing state during the mounting work, the stay and the body frame can be assembled, so that the mounting hole positions of the stay and the frame can be automatically and accurately obtained. And excellent effects such as easy assembling work can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bumper beam in a state where a stay and a bracket according to the present embodiment are mounted.

FIG. 2 is a sectional view taken along the line AA in FIG. 1 and is a view in which a bumper beam is temporarily fixed to be attached to a frame on a vehicle body side.

FIG. 3 is a sectional view similar to FIG. 2 in a state where a bumper beam is attached to a vehicle body side frame.

FIG. 4 is a perspective view of a bumper beam and a vehicle body side frame according to a second embodiment.

FIG. 5 is a sectional view of a conventional bumper beam mounting structure.

FIG. 6 is a sectional view of a bumper beam mounting structure as another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bumper beam 2 Stay 2A Engagement part 3 Frame 3A Engagement part 4 Nut 5 Bracket 6 Contact surface 7 Bolt insertion hole 8 Hole 9 Temporary fixing screw 10 Bolt insertion hole 11, 12 Bolt 13 Cover plate 14 Locking part 15 nut

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tetsuya Shimada 1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo F-term in Fuji Heavy Industries, Ltd. (Reference) 3D003 AA04 AA05 AA11 BB01 CA02 CA09 DA01

Claims (6)

[Claims] A stay inserted into the frame from one end of the body frame; and a bumper beam fixed to the other end of the stay, wherein the stay is fixed to at least one surface of an inner wall of the body frame. A bumper beam mounting structure, wherein at least the bumper beam or the other end of the stay and the vehicle body are fixed near the joint between the stay and the bumper beam. 2. The bumper beam mounting structure according to claim 1, wherein said body frame has a tubular cross section. 3. A structure in which a locking portion is provided above a rear end of the vehicle body frame, a bracket is provided near a joint between the stay and the bumper beam, and the locking portion is fixed to the bracket. The bumper beam mounting structure according to claim 1, wherein: 4. The vehicle body frame has a U-shaped cross section and a cover plate for closing the U-shaped opening.
A locking portion is erected at a rear end of the cover plate, and a bracket is provided near a coupling portion on the other end side of the bumper beam or the stay, and the bracket is fixed to the locking portion. The bumper beam mounting structure according to claim 3, wherein 5. The vehicle body frame has a shape capable of inserting and holding the stay, and has an engagement portion on an inner peripheral surface of the vehicle body frame insertion portion. The stay has a stay inserted into the vehicle body frame. The bumper beam mounting structure according to any one of claims 1 to 4, further comprising an engaged portion that engages with the engaging portion in a state. 6. An engagement portion formed on an inner peripheral surface of the vehicle body frame insertion portion, and an engaged portion engaged with the engagement portion is configured to be fixed by a temporary fixing means. The bumper beam mounting structure according to claim 5, wherein: