JPH09263196A - Mounting structure for front underrun protector for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To commonly use components and improve the appearance of a front underrun protector which prevents a passenger car from going under a truck in a head-on collision between a passenger car or the like and a truck or the like in a construction in which the upper and lower mounting points of the front underrun protector vis-a-vis the car body frame are changed. SOLUTION: When the upper and lower mounting points of a front underrun protector vis-a-vis car body frame 3 according to the road clearance of the vehicle, an air dam 4 to which a front undrrun protector 2 is united is slid upward und downward to determine the upper and lower points, a bolt insertion hole 9 provided in a cross member 3B and a bolt insertion hole provided in a bracket 5 are selected according to these points, and the air dam 4 is fastened to the cross member 3B and a mounting plate 6 of the front underrun protector 2 is fastened to the bracket 5 by means of bolts inserted into each bolt insertion hole 9, bolt insertion hole of the air dam and bolt insertion hole of a mounting plate 6 and nuts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle front underrun for preventing a vehicle such as a passenger car from slipping under a vehicle such as a truck when the vehicle such as a truck collides with a vehicle such as a passenger car. The present invention relates to a protector, and more particularly to a mounting structure for a front underrun protector.

[0002]

2. Description of the Related Art Conventionally, a truck bumper is provided at a high position with respect to a passenger car such that the windshield of the passenger car hits the bumper. It was sometimes said that it would end up. For this reason, there has been proposed a device in which a bracket is fixed in front of the vehicle body frame below the bumper, and a front underrun protector is provided on the front surface of a support plate rotatably provided on the bracket (actual open flat 6-8).
No. 114).

Further, a front spring bracket for supporting a front end portion of a spring of a spring type suspension on a vehicle body frame is integrally formed with an arm portion projecting forward, and a front underrun protector is fixedly attached to the arm portion. Things are also known (Actual Kaihei 7-4209
Reference).

[0004]

The upper and lower mounting positions of the front underrun protector with respect to the vehicle body frame differ depending on the vehicle type due to the difference in the ground height of the vehicle. However, conventionally, the structure for changing the upper and lower mounting positions of the front underrun protector with respect to the frame, in particular, the technique for changing the position while sharing the parts has been considered difficult.

Further, as is clear from the above-mentioned prior art of the front underrun protector, the front underrun protector is usually provided exposed at the front part of the vehicle, which is not good looking, but this look is improved. It was also said that the technology to do it was difficult. The present invention has been made in view of the above, and is a structure for changing the upper and lower mounting positions of a front underrun protector for preventing a passenger car from diving at the time of a frontal collision of the passenger car or the like with a truck. In this regard, it is an object to share the parts and improve the appearance of the front underrun protector.

[0006]

Therefore, the invention according to claim 1 is a mounting structure of a front underrun protector disposed behind a front bumper of a vehicle, wherein the front underrun protector comprises: The air dam is arranged so as to cover the vehicle front part below the front bumper, and the upper end is fixedly attached to the rear surface of the air dam that is slidably inserted between the front bumper back part and the front part of the vehicle body frame. At the selected predetermined slide insertion position between the front bumper back of the upper end and the front of the body frame,
A front underrun protector of a vehicle, which is fixedly attached to a cross member connecting left and right side rails of a vehicle body frame, and at the same time, the front underrun protector is fixedly attached to a bracket fixedly mounted on the left and right siderails. It has a mounting structure.

According to a second aspect of the present invention, the air dam and the cross member are fixed and attached by fasteners, and the front underrun protector and the bracket are fixed and attached by fasteners. The bracket has the fastener insertion holes formed at a plurality of positions corresponding to a plurality of fixed mounting positions of the air dam and the cross member.

According to a third aspect of the present invention, the air dam and the cross member are fixed and attached by fasteners, and the front underrun protector and the bracket are fixed and attached by fasteners. The bracket is formed with long holes through which the fasteners are inserted and slid in a length range corresponding to a plurality of fixed mounting positions of the air dam and the cross member.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2, a front underrun protector 2 disposed behind a front bumper 1 of a vehicle is disposed so as to cover a vehicle front portion below the front bumper 1 and an upper end portion thereof is a front bumper. 1 is fixedly attached to the back surface of the air dam 4 which is slidably inserted between the back portion and the front portion of the vehicle body frame 3.

The air dam 4 is attached to a cross member 3B connecting the left and right side rails 3A of the vehicle body frame 3 at a selected predetermined slide insertion position between the back portion of the front bumper 1 at the upper end portion and the front portion of the vehicle body frame 3. While being fixedly attached, the front underrun protector 2 is fixedly attached to a bracket 5 fixedly attached to the left and right side rails 3A.

[0011] To describe this structure in detail, the front underrun protector 2 is formed of a sheet metal in the shape of a horizontally elongated hollow rectangular body. A pair of mounting plates 6 are respectively fixed to two positions on both ends of the rear wall of the front underrun protector 2 which are spaced apart from each other. The holes 7 are formed respectively.

The air dam 4 is formed in a plate shape extending in the lateral direction of the vehicle and has a lower portion 4A having a substantially U-shaped cross section.
And a flat upper part 4B, and the lower part 4
At the lower end edge of A, a receiving plate portion 4C that horizontally extends rearward is formed. The front underrun protector 2 is arranged on the back side of the lower portion of the air dam 4, and is fixedly attached to the air dam 4 by fasteners such as bolts or welding while being received by the receiving plate portion 4C. Are integrated.

A plurality of bolt insertion holes 8 of a fastener composed of a bolt and a nut are formed in a plurality of rows in the vertical direction at two portions of the upper portion 4B of the air dam 4 which are separated from each other on the left and right. On the other hand, 2 which is separated to the left and right of the cross member 3B
A bolt insertion hole 9 is provided in the portion corresponding to the row 8 of insertion holes of the air dam 4 among fasteners composed of bolts and nuts.
Are each formed by arranging a plurality of columns in the vertical direction.

Further, substantially L-shaped mounting members 10 are fixed to the upper ends of the brackets 5 by welding or the like, and each bracket 5 holds the mounting members 10 under the left and right side rails 3A. They are fixedly attached to the side corners by welding or bolts, respectively. Such bracket 5
Among the fasteners, each of which is composed of a bolt and a nut, a plurality of bolt insertion holes 11 are provided in the vertical direction and formed in the horizontal direction.

In such a structure, in order to adjust the upper and lower mounting positions of the front underrun protector 2 with respect to the vehicle body frame 3 according to the ground clearance of the vehicle, the air dam 4 integrated with the front underrun protector 2 is slid up and down. The upper and lower positions are determined and the bolt insertion hole 9 and the bracket 5 provided in the cross member 3B are determined according to this position.
And the bolts and nuts inserted into the bolt insertion holes 8 and 11 of the air dam 4 and the bolt insertion holes 7 of the mounting plate 6 are used to cross the air dam 4. The mounting plate 6 of the front underrun protector 2 may be fastened to the bracket 5 on the member 3B.

The pair of mounting plates 7 in the front underrun protector 2 are fastened to the brackets 5 with bolts and nuts set in the brackets 5 so as to sandwich the brackets 5 from both sides. As a result of attaching the front underrun protector 2 to the front part of the vehicle as described above, when the truck collides with the passenger vehicle,
It is possible to prevent the passenger car from hitting the front underrun protector 2 near the radiator grill of the passenger car and getting into the lower part of the truck.

According to the mounting structure of the front underrun protector 2 having such a structure, when changing the vertical mounting position of the front underrun protector 2 with respect to the vehicle body frame 3, the mounting position with respect to the cross member 3B of the air dam 4 is changed. Since it is only necessary to change the mounting position of the front underrun protector 2 to the bracket 5, the front underrun protector 2 body frame 3
Parts can be shared when changing the upper and lower mounting positions with respect to.

That is, even if the upper and lower mounting positions of the front underrun protector 2 are different for each vehicle, there is no need to change the front underrun protector 2, the front bumper 1, the air dam 4, etc. Is 1
Since the number of types is good, the number of parts can be reduced, which is advantageous in terms of cost. Further, the front underrun protector 2 is fixed to the back side of the air dam 4 so as to be shielded from the outside by the air dam 4 so as not to be exposed at the front part of the vehicle, so that it looks good.

In addition, in the structure in which the air dam 4 and the cross member 3B are fixedly attached by fasteners, and the front underrun protector 2 and the bracket 5 are fixedly attached by bolts and nuts, the cross member 3B and the bracket 5 are attached. , Long holes through which bolts are inserted and slid are formed in length ranges corresponding to a plurality of selected fixed mounting positions of the air dam 4 and the cross member 3B, and the vertical position of the air dam 4 is slidably adjusted. The air dam 4 may be fixed at an arbitrary slide position, and the vertical position of the front underrun protector 2 may be freely selected.

[0020]

As described above, according to the invention of claim 1, even when the upper and lower mounting positions of the front underrun protector are different for each vehicle, the front underrun protector and the front underrun protector are provided. Since it is possible to share parts without changing other parts around, it is possible to reduce the number of parts and it is also advantageous in terms of cost.The front underrun protector is fixed to the rear side of the air dam, Since it is shielded from the outside so as not to be exposed at the front of the vehicle, the appearance can be improved.

According to the second aspect of the invention, the upper and lower mounting positions of the front underrun protector can be easily adjusted by changing the positions of the insertion holes of the fasteners provided on the air dam and the cross member. According to the invention of claim 3, the vertical position of the air dam is slidably adjusted to fix the air dam at the adjusted position, whereby the upper and lower mounting positions of the front underrun protector can be freely and easily adjusted. It can be carried out.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a mounting structure for a front underrun protector of a vehicle according to the present invention.

FIG. 2 is a cross-sectional view of FIG.

[Explanation of symbols]

 1 Front bumper 2 Front underrun protector 3 Body frame 3A Side rail 3B Cross member 4 Air dam 5 Bracket 6 Mounting plate 7 Bolt insertion hole 8 Bolt insertion hole 9 Bolt insertion hole 11 Bolt insertion hole

Claims (3)

[Claims] 1. A mounting structure for a front underrun protector disposed behind a front bumper of a vehicle, wherein the front underrun protector is disposed so as to cover a vehicle front portion below the front bumper. , And the upper end is fixedly attached to the rear surface of the air dam where the upper part is slidably inserted between the rear part of the front bumper and the front part of the body frame, and the air dam is selected between the rear part of the front bumper at the upper end and the front part of the body frame. At a predetermined slide insertion position, the front underrun protector is fixedly attached to the cross member that connects the left and right side rails of the vehicle body frame, and the bracket is fixedly attached to the left and right side rails. The mounting structure of the front underrun protector of the vehicle characterized by the above. 2. The air dam and the cross member are fixedly attached by fasteners, and the front underrun protector and the bracket are fixedly attached by fasteners, and the cross member and the bracket are provided with air dams. 2. The mounting structure for a front underrun protector of a vehicle according to claim 1, wherein insertion holes for fasteners are formed at a plurality of positions corresponding to a plurality of fixed mounting positions of the cross member. 3. The air dam and the cross member are fixedly attached by fasteners, and the front underrun protector and the bracket are fixedly attached by fasteners, and the cross member and the bracket are provided with air dams. 2. The front underrun protector for a vehicle according to claim 1, wherein each of the long holes through which the fastener is inserted and slid is formed in a length range corresponding to a plurality of selected fixed mounting positions of the cross member. Mounting structure.