JP6443064B2 - Vehicle front structure - Google Patents

Description

  The present invention relates to a vehicle front structure.

  A structure is disclosed in which a nut for fixing a tow hook is attached to a joint portion between a bumper reinforcement and a crash box in the front portion of the vehicle (see Patent Document 1).

JP2013-9999A

  When a vehicle is loaded on a ship or the like, the vehicle is secured to a floor portion of the ship or the like using a rope. At this time, when a rope is hung on the traction hook described in the conventional example and secured, a load to the vehicle lower side is input to the crash box through the traction hook and the nut. In order to suppress local deformation of the crash box due to this load, it is necessary to reinforce the periphery of the nut.

  On the other hand, if the nut peripheral part is simply reinforced, it is considered that the crash box is not easily deformed at the time of the collision of the front part of the vehicle.

  In consideration of the above-mentioned fact, the present invention is capable of suppressing the local deformation of the crash box when the vehicle is secured while ensuring the shock absorption due to the deformation of the crash box at the time of the collision of the front of the vehicle. Objective.

The vehicle front portion structure according to claim 1 is covered with a bumper reinforcement extending in the vehicle width direction at the vehicle front portion, a rectangular tube-shaped main body portion, and a front end of the main body portion. and a reinforcement for closing, said has a bumper reinforcement of the combined crash box to the vehicle rear side, a cylindrical portion and a flange provided at an end portion of the vehicle front side of the cylindrical portion, said flange and lashing nut fixed to the coupling portion between the bumper reinforcement and the crash box in locked state to the front surface of the reinforcement, provided in the crush box, the bracing nut longitudinal vehicle while being relatively movable through the direction, anda partition wall for supporting the lashing nut, said partition wall, out corresponding to the outer diameter of the lashing nut Through holes are formed, the inner periphery of the through hole is in contact with the outer peripheral surface of the lashing nut.

In this vehicle front structure, since the bracing nut is supported by the partition wall, the load input to the lashing nut when lashing of the vehicle, the fixation of the lashing nut in the coupling portion between the bumper reinforcement and crash boxes It is transmitted not only to the section but also to the partition. On the other hand, since the partition wall is provided in the crash box and the lashing nut is movable relative to the partition wall in the vehicle front-rear direction, it is accompanied by axial compression deformation of the crash box at the time of the collision of the vehicle front part. The bulkhead does not prevent retraction of the lashing nut . In other words, the axial compression deformation of the crash box is not hindered by the partition wall.
The invention according to claim 2 is the vehicle front structure according to claim 1, wherein bent portions are provided at both ends of the partition in the vehicle vertical direction, and the bent portions are connected to a ceiling portion of the crash box. Each is joined to the bottom.

  According to the present invention, it is possible to obtain an excellent effect that local deformation of the crash box at the time of securing the vehicle can be suppressed while securing shock absorption due to the deformation of the crash box at the time of collision of the vehicle front.

It is a perspective view which shows a part of vehicle front part which has the vehicle front part structure which concerns on this embodiment. FIG. 2 is a cross-sectional view taken along the arrow 2-2 in FIG. 1 showing the vehicle front structure according to the embodiment. It is sectional drawing which shows the deformation | transformation state of the crash box when the front part of a vehicle collides.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 and 2, the vehicle front structure S according to the present embodiment includes a bumper reinforcement 10, a crash box 12, a securing nut 14 as an example of a traction member, and a partition wall 16.

  The bumper reinforcement 10 extends in the vehicle width direction at the vehicle front portion 18 and has, for example, a hat shape in cross section. The crash box 12 is a member that is coupled to the rear side of the bumper reinforcement 10 and absorbs an impact by axial compression deformation at the time of a collision of the vehicle front portion 18. In FIG. 2, the crash box 12 includes a rectangular tube-shaped main body 20 and a reinforcement 22 that covers the front end of the main body 20 and closes the opening of the main body 20. The reinforcement 22 is joined to the front end of the main body portion 20 by welding (welded portion W1).

  In FIG. 1, a through hole 10 </ b> A for inserting the lashing hook 24 and a through hole (not shown) for passing the bolt 28 are formed in the joint portion of the bumper reinforcement 10 with the crash box 12. Yes. The reinforcement 22 at the front end of the crash box 12 is provided with a nut (not shown) that is screwed with the bolt 28, and the bumper reinforcement 10 is fastened to the crash box 12 by the bolt 28 and the nut. . Although not shown, the rear end of the crash box 12 is coupled to the front end of the side member. The side members are vehicle skeletons provided as a pair on both sides of the vehicle front portion 18 in the vehicle width direction.

  In FIG. 2, the lashing nut 14 is fixed to a joint portion between the bumper reinforcement 10 and the crash box 12. Specifically, the lashing nut 14 has a cylindrical portion 14A and a flange 14B provided at the end of the cylindrical portion 14A on the vehicle front side, and is screwed to the lashing hook 24 on the inner periphery. A female screw 14C (FIG. 3) is formed. The cylindrical portion 14 </ b> A of the lashing nut 14 is inserted from the vehicle front side into the through hole 22 </ b> A formed in the reinforcement 22 of the crash box 12. The flange 14 </ b> B is locked to the front surface of the reinforcement 22. The lashing nut 14 is fixed to the crash box 12 by welding the flange 14B to the front surface of the reinforcement 22 (welded portion W2).

In FIG. 2, a partition wall 16 is a member that is provided in the crash box 12, is inserted through the lashing nut 14 so as to be relatively movable in the vehicle front-rear direction, and supports the lashing nut 14. Specifically, a through hole 16A having an inner diameter corresponding to the outer diameter of the cylindrical portion 14A of the securing nut 14 is formed in the partition wall 16, and the cylindrical portion 14A is inserted into the through hole 16A. The inner periphery of the through hole 16A is in contact with the outer peripheral surface of the cylindrical portion 14A. Thereby, the securing nut 14 is supported by the partition wall 16. In the illustrated example, the partition wall 16 is provided at one location apart from the rear side of the reinforcement 22 and supports the rear end portion of the lashing nut 14. Bending portions 16B are provided at both ends of the partition wall 16 in the vehicle vertical direction. The bent portions 16B are respectively joined to the ceiling portion and the bottom portion of the main body portion 20 of the crash box 12.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. When the vehicle is loaded on a ship or the like, as shown in FIG. 2, the lashing hook 24 is attached to the lashing nut 14, and a rope (not shown) is hung on the lashing hook 24 to place the vehicle on the floor of the ship or the like. When lashed, a load F1 directed downward in the vehicle acts on the lashing nut 14. In the vehicle front structure S according to the present embodiment, the rear end portion of the lashing nut 14 is supported by the partition wall 16 provided in the crash box 12, so that the load F <b> 1 is the fixed portion of the lashing nut 14. Is transmitted not only to the reinforcement 22, but also to the partition wall 16. Thereby, local deformation of the crash box 12 is suppressed.

  On the other hand, as shown in FIG. 3, when the barrier 34 collides with the vehicle front portion 18, the load F <b> 2 from the barrier 34 is input to the crash box 12 via the bumper reinforcement 10. Then, shock absorption is performed by the axial compression deformation of the crash box 12. The lashing nut 14 is retracted along with the axial compression deformation of the crash box 12. However, in the present embodiment, the lashing nut 14 is movable relative to the partition wall 16 in the vehicle front-rear direction. The partition wall 16 does not prevent 14 from moving backward. In other words, the axial compression deformation of the crash box 12 is not prevented by the partition wall 16.

  Thus, according to the present embodiment, local deformation of the crash box 12 when the vehicle is secured can be suppressed while securing shock absorption due to the deformation of the crash box 12 when the vehicle front portion 18 collides.

[Other Embodiments]
As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is.

  Although the lashing nut 14 is mentioned as an example of the traction member and the lashing hook 24 is attached to the lashing nut 14, the traction member is not limited to this. For example, a configuration in which a lashing hook is directly fixed to a joint portion between the bumper reinforcement 10 and the crash box 12 without using a lashing nut may be employed.

10 Bumper reinforcement 12 Crash box 14 Locking nut (traction member)
16 Bulkhead 18 Vehicle front S Vehicle front structure

Claims (2)

Bumper reinforcement extended in the vehicle width direction at the front of the vehicle,
A crash box coupled to the rear side of the bumper reinforcement, having a rectangular tube-shaped main body, and a reinforcement covering the front end of the main body and closing the opening of the main body ;
The bumper reinforcement and the crash box are coupled to each other with a cylindrical portion and a flange provided at an end of the cylindrical portion on the vehicle front side, and the flange is locked to the front surface of the reinforcement. A lashing nut fixed to the part,
A partition provided in the crash box, the lashing nut is inserted so as to be relatively movable in the vehicle longitudinal direction, and a partition wall supporting the lashing nut ;
Have
A through-hole structure having an inner diameter corresponding to the outer diameter of the lashing nut is formed in the partition wall, and an inner periphery of the through hole is in contact with an outer peripheral surface of the lashing nut . Bending portions are provided at both ends of the partition in the vehicle vertical direction,
The vehicle front structure according to claim 1, wherein the bent portion is joined to a ceiling portion and a bottom portion of the crash box.

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