JP2009073332A - Vehicle body front part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body front part structure enhancing front surface collision-resistance performance at a headlamp periphery part of a cab-over type vehicle. <P>SOLUTION: The vehicle body front part structure of the cab-over type vehicle 1 is made to a constitution provided with: a head lamp unit 21 provided on a vehicle body front surface; a head lamp bracket 22 fixed to the vehicle body and retaining a rear part of the head lamp unit; a front pillar 15 arranged on a rear side of the vehicle relative to the head lamp bracket and formed along a front edge part of a door opening provided on a side surface of the vehicle body; a reinforcement member 30 laid between the head lamp bracket and the front pillar; and a slant surface part 25 provided on the head lamp bracket and moving the head lamp bracket to a side when the head lamp unit is retreated relative to the head lamp bracket. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle body front structure of a cab-over type vehicle, and more particularly to a vehicle body front structure that improves front-to-front collision performance in the periphery of a headlamp.

In a cab-over type vehicle in which the driver's seat is provided at the upper part of the front wheel, the distance from the front of the vehicle to the occupant's living space is short. Effective use of bull stroke is required.
Conventionally, for the purpose of improving the resistance of the front panel against the frontal collision load of a cab-over type vehicle, the front grille is protruded forward from the phosphorus reinforcement fixing part of the front panel, and the front grille can be rotated with respect to the bracket. A configuration in which a water tank that also functions as an energy absorbing member is arranged inside the front grill is known (see, for example, Patent Document 1).
JP 2000-203455 A

In the case of a cab-over type vehicle, the occupant's living space is immediately after the headlamp, so that the headlamp unit and brackets that support it are prevented from retreating to the vehicle interior side in the event of a frontal collision of the vehicle. Also, it is desired to effectively absorb the collision energy.
The subject of this invention is providing the vehicle body front part structure which improved the front-to-front collision performance in the headlamp periphery part of a cab over type vehicle.

The present invention solves the above-described problems by the following means.
The invention according to claim 1 is a vehicle body front part structure of a cab over type vehicle in which a driver's seat is provided at an upper portion of a front wheel, the head lamp unit provided on the front surface of the vehicle body, fixed to the vehicle body, A headlamp bracket that supports a rear portion, a front pillar that is disposed on the vehicle rear side with respect to the headlamp bracket and that is formed along a front edge portion of a door opening provided on a side surface of the vehicle body; and the headlamp bracket; A stiffening member provided between the front pillar and the headlamp bracket. When the headlamp unit moves backward with respect to the headlamp bracket, the headlamp unit moves to the side. A vehicle body front portion structure having a slope portion to be moved.

According to a second aspect of the present invention, in the vehicle body front portion structure according to the first aspect, the headlamp bracket is provided on the front side of the vehicle with respect to the connection portion with the stiffening member and substantially along the front-rear direction of the vehicle. A vehicle body front portion structure characterized by having a wall portion extending in a vertical direction.
A third aspect of the present invention is the vehicle body front structure according to the first or second aspect, further comprising a beam-shaped cross member provided between the left and right headlamp brackets. Front structure.

According to the present invention, the following effects can be obtained.
(1) By providing a stiffening member that connects the headlamp bracket and the front pillar, the headlamp bracket can be prevented from moving backward during a frontal collision and prevented from entering the vehicle interior. Further, energy can be absorbed by promoting deformation of the headlamp bracket.
In addition, by providing a slope that moves the headlamp unit to the side when the headlamp unit retracts, the headlamp unit is dropped to the side at the time of a frontal collision, The directional deformation stroke can be increased to reduce the remaining crush of the headlamp bracket, thereby further suppressing the intrusion into the passenger compartment.
Furthermore, the rigidity of the cabin can be improved by increasing the bonding strength between the headlamp bracket and the pillar.
(2) The headlamp bracket is provided on the vehicle front side with respect to the connection portion with the stiffening member, and has a wall portion extending substantially along the front-rear direction of the vehicle. By deforming such as bending, the amount of energy absorbed by the headlamp bracket can be increased.
(3) By providing a beam-shaped cross member between the left and right headlamp brackets, the collision input is transmitted to the left and right headlamp brackets even when a collision occurs in the center in the vehicle width direction. In addition, energy can be absorbed by deformation of the headlamp bracket.

  An object of the present invention is to provide a vehicle body front structure with improved front-to-front collision performance in a headlamp peripheral portion of a cab-over type vehicle. The present invention provides a stiffening member that connects a headlamp bracket and a pillar, In part, this was solved by forming a slope to drop the headlamp unit outward in the vehicle width direction when the headlamp unit was retracted.

Embodiment 1 of a vehicle body front structure to which the present invention is applied will be described below. The vehicle body front structure of the first embodiment is applied to a cab-over type light freight vehicle in which a driver's seat is provided on the upper part of the front wheel.
FIG. 1 is a front view of a vehicle to which the vehicle body front structure of the first embodiment is applied.
FIG. 2 is a side view of the vehicle of FIG.

The vehicle 1 is, for example, a cab-over 1 box van type light freight vehicle, and a cabin 10 including a driver's seat is disposed above the front wheel FW. The cabin 10 includes a front panel 11, a front grill 12, a side outer panel 13, a front door 14, and the like.
The front panel 11 is a vehicle body outer plate provided on the front portion of the vehicle body. The front panel 11 is disposed over a range from the lower end of the windshield FG to the front bumper B.
The front grill 12 is a decorative resin panel attached to the front surface of a part of the front panel 11.
The side outer panel 13 is a vehicle body outer plate disposed between a side end portion of the front panel 11 and a front end portion of the front door 14.
The front panel 11 and the side outer panel 13 are formed, for example, by pressing a steel plate.

  The front door 14 is provided in a door opening provided on the side of the cabin 10 so as to be openable and closable, and is used for getting on and off the driver's seat and the passenger seat. The front door 14 is formed by joining a door outer panel, a door inner panel, or the like formed by pressing a steel plate, for example, and is opened and closed in a rear-opening manner by a hinge provided at the front end.

A headlamp unit 20 is provided at the front of the cabin 10. As shown in FIGS. 1 and 2, the headlamp unit 20 is provided at both ends of the front surface of the vehicle in the vehicle width direction.
3 is a cross-sectional view taken along the line III-III in FIGS. 1 and 2.
FIG. 4 is a view taken along the arrow IV in FIG.
The headlamp unit 20 includes a headlamp unit 21, a headlamp bracket 22, and the like.
The cabin 10 further includes a front pillar 15 and a side inner panel 16.
A stiffening member 30 is provided between the headlamp bracket 22 and the front pillar 15.

The headlamp unit 21 is a modified headlamp in which, for example, a bulb, a reflector, a lens, and the like are accommodated in a resin housing.
The headlamp bracket 22 is a member that supports the headlamp unit 21 with respect to the cabin 10. The headlamp bracket 22 is a sheet-shaped cup-shaped member formed such that the front portion of the vehicle is recessed rearward, and the housing portion of the headlamp unit 21 is accommodated and fixed in the recess. .

The head lamp bracket 22 is integrally formed with a rear surface portion 23, a vertical wall portion 24, a slope portion 25, and the like.
The rear surface portion 23 is a flat surface portion that is disposed to face the surface portion of the headlamp unit 21 on the vehicle rear side. The rear surface portion 23 is formed with an opening 23 a through which a harness for supplying power to the headlamp unit 21 is drawn out from the cabin 10. The rear surface portion 23 is disposed so as to be inclined with respect to the vehicle width direction so that the end portion on the outer side in the vehicle width direction is closer to the vehicle rear side than the end portion on the inner side. Further, the end portion of the rear surface portion 23 on the outer side in the vehicle width direction is fixed to the front end portion of the side inner panel 16 by spot welding or the like.

  The vertical wall portion 24 is formed to extend from the inner end of the rear surface portion 23 in the vehicle width direction to the vehicle front side. The vertical wall portion 24 is disposed to face the inner side surface portion of the headlamp unit 21 in the vehicle width direction. Further, the front end portion of the vertical wall portion 24 is fixed to the front panel 11 by spot welding or the like.

The inclined surface portion 25 is a flat surface portion provided at a joint portion between the rear surface portion 23 and the vertical wall portion 24 and arranged to be inclined with respect to each of these surface portions.
As shown in FIG. 3 and the like, the slope portion 25 is arranged so that the normal direction thereof is directed obliquely forward of the vehicle, and the rear end portion of the headlamp unit 21 in the normal state of the vehicle (the state before the collision). Is opposed to the corner portion on the inner side in the vehicle width direction with a minute gap.
Further, as shown in FIG. 4, the slope portions 25 are respectively provided at the upper end portion and the lower end portion in the height direction of the headlamp bracket 22. In regions other than the upper end and the lower end, the rear surface portion 23 and the vertical wall portion 24 are directly joined.

As shown in FIG. 2, the front pillar 15 is a structural member arranged so as to extend in the vertical direction along the front edge portion of the door opening of the cabin 10. As shown in FIG. 3, the front pillar 15 is configured such that, for example, a pair of steel plate press parts are joined in a monaca shape so that a cross section viewed along a horizontal plane is a closed cross section.
The side inner panel 16 is a member provided between the headlamp bracket 22 and the front pillar 15 and extending in the front-rear direction of the vehicle. The side inner panel 16 is formed by pressing a steel plate, for example.
The front end portion of the side inner panel 16 is fixed to the end portion on the outer side in the vehicle width direction of the rear surface portion 23 of the headlamp bracket 22 by spot welding or the like. The rear end portion of the side inner panel 16 is fixed to the front end portion of the front pillar 15 by spot welding or the like.

The stiffening member 30 is provided between the headlamp bracket 22 and the front pillar 15. As shown in FIG. 4, the stiffening member 30 is provided at two locations on the top and bottom of the headlamp bracket 22. In FIG. 4, the upper and lower stiffening members 30 are illustrated with suffixes U and L, respectively.
For example, the stiffening member 30 is formed in a stay shape by pressing a steel plate having a plate thickness larger than that of the material of the headlamp bracket 22. The stiffening member 30 has a flat plate-like main body portion 31 that is disposed substantially horizontally, and fixed surface portions (welding margin portions) 32 and 33 formed by bending both ends of the main body portion 31.
At the end portion of the stiffening member 30 on the headlamp bracket 22 side, the fixing surface portion 32 is fixed to the back surface of the slope portion 25 (the surface inside the cabin 10) by spot welding or the like. On the other hand, the end portion on the front pillar 15 side of the stiffening member 30 is fixed to the inner surface portion (surface portion facing inward in the vehicle width direction) of the front pillar 15 by spot welding or the like. The fixing location between the front pillar 15 and the fixing surface portion 33 is arranged on the vehicle rear side and on the outer side in the vehicle width direction with respect to the fixing location between the slope portion 25 and the fixing surface portion 32.

Next, the effect of Example 1 mentioned above is demonstrated in contrast with the comparative example of this invention demonstrated below. Note that, in the comparative example and Example 2 described later, portions that are substantially the same as those in Example 1 described above are denoted by the same reference numerals, description thereof is omitted, and differences are mainly described.
FIG. 5 is a cross-sectional view of the headlamp portion in the vehicle body front structure of the comparative example, and shows a cross-section corresponding to FIG. 3 in the first embodiment. In FIG. 5, each member after a frontal collision of the vehicle is illustrated by broken lines.
The vehicle body front portion structure of the comparative example is obtained by omitting the slope portion 25 of the headlamp bracket 22 and the stiffening member 30 from the vehicle body front portion structure of the first embodiment.
As shown by a broken line in FIG. 5, in the case of the comparative example, since the restraint in the front-rear direction of the headlamp bracket 22 is weak, the headlamp bracket 22 and the headlamp unit 21 are affected by the load received from the front during a frontal collision of the vehicle. The vehicle moves backward in parallel with the vehicle body and enters the cabin 10.

FIG. 6 is a diagram illustrating vehicle body deformation or the like at the time of a frontal collision in the vehicle body front structure according to the first embodiment, and each member after the frontal collision is illustrated by a broken line as in FIG.
In the case of the first embodiment, by providing the stiffening member 30 on the rear side of the headlamp bracket 22, the restraint of the headlamp bracket 22 in the vehicle front-rear direction is strengthened compared to the comparative example.
When a load is applied to the headlamp unit 21 from the front and the headlamp unit 21 moves backward with respect to the headlamp bracket 22, the rear end portion of the headlamp bracket 21 is placed on the slope portion 25 of the headlamp bracket 22. By being pressed, it is pressed outward in the vehicle width direction. As a result, the fixing portion of the headlamp unit 21 with the headlamp bracket 22 is destroyed, and the headlamp unit 21 falls off to the outside in the vehicle width direction.

As described above, according to the first embodiment, the restraint of the rear surface portion 23 is strengthened, and the headlamp unit 21 is dropped, whereby the vertical wall portion 24 is buckled and deformed by the load in the front-rear direction, and the energy is effectively absorbed. can do. As a result, the backward movement of the rear surface portion 23 of the headlamp bracket 22 can be reduced.
Further, the load input to the headlamp bracket 22 is transmitted to the front pillar 15 via the stiffening member 30, and a torsional moment is applied to the front pillar 15 in a direction in which the rear end thereof opens outward in the vehicle width direction. . When the front pillar 15 undergoes torsional deformation due to this torsional moment, the energy of the collision is absorbed by this deformation as well.
Furthermore, by providing the stiffening member 30, the rigidity of the cabin 10 is improved.

FIG. 7 is a cross-sectional view of the vehicle body front structure to which the present invention is applied in Embodiment 2, and shows a cross-section corresponding to FIG. 3 in Embodiment 1 described above.
In the vehicle body front structure of the second embodiment, a cross member 40 described below is provided between the left and right headlamp brackets 22.
The cross member 40 is a beam-like member disposed so as to extend in the vehicle width direction substantially along the inner surface (the vehicle rear side surface) of the front panel 11. Both ends of the cross member 40 are bent toward the rear side of the vehicle. The end of the cross member 40 is fixed to the inner surface in the vehicle width direction of the vertical wall 24 of the headlamp bracket 22 by spot welding or the like.
According to the second embodiment described above, in addition to the same effects as the first embodiment described above, even when a load due to a collision is applied to the central portion in the vehicle width direction, the load is transmitted to the headlamp bracket 22. And the energy absorption effect mentioned above can be acquired.

(Modification)
The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the technical scope of the present invention.
(1) The shape and structure of the headlamp bracket and the stiffening member are not limited to those of the above-described embodiments. For example, a portion that is a single component in each embodiment may be configured by a plurality of members, or conversely, a portion that is configured by a plurality of members in each embodiment may be integrated.
(2) In the second embodiment, the cross member is provided between the side portions of the headlamp bracket. However, the present invention is not limited to this, and the cross member is not limited to the one that is directly fixed between the upper portion and the lower portion of the headlamp bracket. Instead, it may be mounted via other components.
(3) In each of the embodiments, the vertical wall portion, which is the side surface portion of the headlamp bracket, is buckled to absorb energy. However, the present invention is not limited to this. It is good also as a structure which aims at the energy absorption by deform | transforming the wall surface part of the other member provided in the vicinity of the lamp bracket. In this case, when a surface portion extending substantially along the front-rear direction of the vehicle is used, buckling deformation occurs and the energy absorption effect is enhanced.

1 is a front view of a vehicle to which a first embodiment of a vehicle body front structure to which the present invention is applied is applied. It is a side view of the vehicle of FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIGS. 1 and 2. FIG. 4 is a view taken along arrow IV in FIG. 3. It is sectional drawing of the headlamp part in the vehicle body front part structure which is a comparative example of this invention. It is a figure which shows the vehicle body deformation | transformation at the time of front collision in the vehicle body front part structure of Example 1. FIG. It is sectional drawing of the headlamp part in Example 2 of the vehicle body front part structure to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 10 Cabin 11 Front panel 12 Front grill 13 Side outer panel 14 Front door 15 Front pillar 16 Side inner panel 20 Head lamp part 21 Head lamp unit 22 Head lamp bracket 23 Rear surface part 24 Vertical wall part 25 Slope part 30 Stiffening member 31 Main body 32, 33 Fixed surface FW Front wheel FG Windshield B Front bumper

Claims (3)

A vehicle body front structure of a cab over type vehicle in which a driver's seat is provided on the upper part of the front wheel,
A headlamp unit provided on the front of the vehicle body;
A headlamp bracket fixed to the vehicle body and supporting a rear portion of the headlamp unit;
A front pillar that is disposed on the vehicle rear side with respect to the headlamp bracket and is formed along a front edge portion of a door opening provided on a side surface of the vehicle body;
A stiffening member provided between the headlamp bracket and the front pillar;
A vehicle body front structure, comprising: a slope portion provided on the headlamp bracket, wherein the headlamp unit moves to the side when the headlamp unit moves backward with respect to the headlamp bracket. In the vehicle body front part structure according to claim 1,
The headlamp bracket includes a wall portion that is provided on the vehicle front side with respect to a connection portion with the stiffening member and extends substantially along a vehicle front-rear direction. In the vehicle body front part structure according to claim 1 or claim 2,
A front structure of a vehicle body having a beam-like cross member provided between the left and right headlamp brackets.

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