JP4301129B2 - Deck cross member mounting structure - Google Patents

Description

  The present invention relates to a deck cross member mounting structure, and more particularly to a deck cross member mounting structure in which an end of a deck cross member is coupled to a lower portion of a front pillar.

  A steering handle for switching the traveling direction of the vehicle to a desired direction is disposed in front of the driver's seat of the automobile. The steering column that supports the steering handle has a front portion supported by a steering mechanism on the engine room side and a rear portion supported by a deck cross member. In addition, an instrument panel supported by the vehicle body skeleton member is disposed in the front part of the passenger compartment, and the deck cross member is located below the instrument panel and also supports the instrument panel. Both ends of the deck cross member are coupled to the lower portions of the left and right front pillars, which are vehicle body frame members, at the front part of the passenger compartment. Further, a cowl top extends in the vehicle width direction in front of the deck cross member, and the rigidity of the front part of the passenger compartment is ensured by a deck constituent member including the cowl top and the deck cross member.

  The steering column has an intermediate portion in the longitudinal direction attached to the deck cross member, and a steering handle having a relatively large mass is attached to the tip of the steering column. For this reason, when the steering column is subjected to engine vibration, the steering handle side tends to vibrate, and the steering handle at the tip of the steering column supported by the pipe-shaped deck cross member may resonate particularly during idle operation. is there.

  Therefore, in order to increase the rigidity of the deck cross member itself that supports the steering column, for example, the vicinity of the steering column mounting portion is coupled to the cowl top side by using a column bracket or the like, whereby the deck cross member is connected to another body frame member. Vibration is suppressed by supporting at three points with respect to the side. In addition, in order to increase the joint rigidity of the part where the deck cross member and the other vehicle body skeleton member are joined, for example, brackets are provided at both ends of the deck cross member, and bolts are provided at the brackets in the vehicle width direction of the left and right front pillars. It is connected by tightening (hereinafter referred to as lateral tightening) or by bolting a plurality of locations in the vehicle front-rear direction (hereinafter referred to as front-rear tightening). An example is disclosed in Patent Document 1 below.

Japanese Patent Laid-Open No. 10-316025

  There is a possibility that an occupant may feel uncomfortable due to resonance on the steering handle side that has received engine vibration, in particular, resonance of the steering wheel during idling. Therefore, in order to prevent the steering handle and the deck cross member that have received engine vibrations from resonating, it is necessary to increase the rigidity of the deck cross member itself and to increase the rigidity of the coupling between the deck cross member and the lower front pillar. .

  However, the deck cross member mounting structure disclosed in Patent Document 1 leaves room for improvement in coupling rigidity, and a deck cross member mounting structure capable of further strengthening the coupling rigidity is demanded.

  In addition, the conventional cross-tightening bracket structure of the deck cross member is effective for strengthening the joint rigidity, but since it is premised on the doorless installation, it cannot be installed after the door is installed. There is. For this reason, in the outfitting line in which the deck cross member is attached after the door is attached, it is not possible to cope with the outfitting with the door attached, and the equipment line needs to be changed significantly.

  The present invention eliminates the discomfort caused by vibration of the steering handle by strengthening the coupling rigidity between the deck cross member and the lower part of the front pillar, and does not require a significant change in the outfitting line. For the purpose of provision.

In the deck cross member mounting structure according to the first aspect of the present invention (corresponding to claim 1), the end of the deck cross member extending in the vehicle width direction and disposed on the vehicle interior side below the front pillar is coupled. A bracket disposed on the vehicle interior side under the front pillar, and a positioning mechanism that determines an arrangement position when the bracket is disposed on the vehicle interior side below the front pillar, and the bracket is positioned by the positioning mechanism. In addition, the bracket is coupled to the lower portion of the front pillar in two directions , the vehicle longitudinal direction and the vehicle width direction, and the bracket has a substantially U-shaped cross section with an opening on the vehicle rear side. The part passes through the bracket in the vehicle width direction and is coupled to the bracket, and the bracket is forwarded by a fastening member that is passed through the opening of the bracket. The bracket is coupled to a lower portion of the front pillar, and the bracket includes a first bracket component having a substantially U-shaped cross section in the vertical direction in the vehicle width direction, and a first bracket component having a substantially U-shaped cross section in the vertical direction in the vehicle width direction. It is characterized by comprising two members of two bracket constituent members .

Deck cross member mounting structure according to the second aspect of the present invention (corresponding to Claim 2) for solving the above problems is the deck cross member mounting structure according to a first inventions, vehicle the bracket in the deck cross member front The front pillar is connected to the lower part of the front pillar at two points in the front-rear direction and at one point in the vehicle width direction behind the deck cross member.

  According to the deck cross member mounting structure according to the first aspect of the invention, it can be coupled to the lower portion of the front pillar in the vehicle longitudinal direction and the vehicle width direction, and is generated in the deck cross member vibration and the twist direction of the deck cross member. Can be suppressed. Thereby, the coupling rigidity between the deck cross member and the lower portion of the front pillar can be strengthened, and the uncomfortable feeling caused by the vibration of the steering wheel, which is generated by the vibration of the deck cross member, can be eliminated.

Further , according to the deck cross member mounting structure according to the first aspect of the present invention, it is possible to have two places where the end of the deck cross member and the bracket are joined in one place in the prior art. Thereby, the coupling rigidity between the deck cross member and the lower portion of the front pillar can be strengthened, and the uncomfortable feeling caused by the vibration of the steering wheel, which is generated by the vibration of the deck cross member, can be eliminated.

Further , according to the deck cross member mounting structure according to the first invention, since the opening is provided in the vehicle interior side rear side of the substantially U-shaped cross section bracket, the fastening member can be easily mounted. The cross member can be easily attached to the lower part of the front pillar. Thereby, productivity can be improved.

Moreover, according to the deck cross member attachment structure which concerns on 1st invention, the board thickness and material of each member can be changed suitably according to the objective. For example, when the thickness of the member on the lower side of the front pillar is increased and the thickness of the member on the lower side of the vehicle interior is decreased, or the member on the lower side of the front pillar is made of a highly rigid material, and the member on the inner side of the vehicle interior is changed. A case of using a lightweight material is considered. Thereby, reinforcement of rigidity and weight reduction can be achieved simultaneously.

According to the deck cross member mounting structure according to the second invention, the fastening member is not obstructed by the door, so that the construction can be performed even after the door is mounted. As a result, even the outfitting line where the door is attached first does not require a significant change, and thus an increase in production cost can be suppressed.

  Hereinafter, an embodiment of a deck cross member mounting structure according to the present invention will be described with reference to FIGS. 1 is a conceptual diagram showing a deck cross member mounting structure according to an embodiment of the present invention, FIG. 2 is a perspective view showing a substantially U-shaped cross section bracket according to the embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a perspective view showing a substantially U-shaped bracket component member B according to an embodiment of the present invention, and FIG. 5 is a pillar according to an embodiment of the present invention. It is a perspective view which shows a side bracket. In the figure, Fr indicates the front direction of the vehicle, In indicates the vehicle interior side in the vehicle width direction, and Up indicates the upper side of the vehicle.

As shown in FIG. 1, a front pillar lower portion 4 is coupled to an end portion of the cowl top 3 at the front portion of the passenger compartment, the front pillar 2 extends above the front pillar lower portion 4, and further below the front pillar lower portion 4. The side sill 5 extends in the rear direction of the vehicle. A dash panel 6 is provided at the bottom of the cowl top 3.
In the front portion of the vehicle compartment, the bracket 10 having a substantially U-shaped cross section is disposed between the end of the deck cross member 1 disposed in the vehicle width direction behind the cowl top 3 and the front pillar lower portion 4.

  A bracket 10 having a substantially U-shaped cross section shown in FIG. 2 is for connecting the right end of the deck cross member 1 and the lower portion 4 of the right front pillar. Here, the substantially U-shaped cross section indicates the shape of a cross section along the xy plane when the vehicle longitudinal direction is the x-axis and the vehicle width direction is the y-axis. The reason why the opening 18 is provided is that the construction when the front and rear fastening bolts 12 are fastened and fixed is taken into consideration. The bracket 10 having a substantially U-shaped cross section is composed of two members: a bracket-shaped member A having a substantially U-shaped cross section shown in FIG. 3 and a bracket-forming member B having a substantially U-shaped cross section shown in FIG.

  Positioning pins 20 are disposed on the surface of the bracket 10 having a substantially U-shaped cross section facing the front side of the vehicle and joined to the pillar-side bracket 11, and front and rear tightening bolt holes 14 are formed at two upper and lower positions. On the surface in contact with the front pillar lower portion 4, a deck cross member through-hole 21 is formed substantially at the center. Further, a surface 25 in contact with the front pillar lower portion 4 has a joint surface 24 with the front pillar lower portion 4 indicated by hatching, and a lateral fastening nut 23 is welded to the rear surface thereof. A deck cross member through hole 22 is formed in a substantially central portion of the surface 26 facing the vehicle interior side in the vehicle width direction. Further, below the surface facing the vehicle width direction vehicle interior side, there is a portion for coupling with other members (not shown), but the description is omitted.

  Positioning pin mounting holes 33 and front and rear tightening bolt holes 14 are formed in the surface 34 of the bracket-shaped member A having a substantially U-shaped cross section shown in FIG. . A deck cross member through-hole 21 is formed in a substantially central portion of a surface 35 facing the front pillar lower portion 4 facing the vehicle width direction, and a circumferential portion thereof serves as a joint surface 16 with the deck cross member 1. .

  A hatched portion indicates a joint surface between the bracket-shaped member A having a substantially U-shaped cross section and the bracket-shaped member B having a substantially U-shaped cross section (see FIG. 4) or the front pillar lower portion 4. The surface 35 in contact with the front pillar lower portion 4 has a joint surface 24 with the front pillar lower portion 4 indicated by oblique lines, has a joint surface 30 facing the vehicle upper direction, and has a joint surface c31 facing the vehicle lower direction, There is a joint surface d32 facing the vehicle interior side in the vehicle width direction.

  A deck cross member through hole 22 is formed in a substantially central portion of a surface 43 of the bracket-shaped member B having a substantially U-shaped cross section shown in FIG. It is a joint surface 17 with the member 1. Further, there is a portion for coupling with another member (not shown) below the surface 43 facing the vehicle width direction vehicle interior side, but the description is omitted.

  In the hatched portion, the bracket-shaped member B having a substantially U-shaped cross section indicates a joint surface with the bracket-shaped member A having a substantially U-shaped cross section. There is a joint surface 40 facing the vehicle upper direction, a joint surface 41 facing the vehicle lower direction, and a joint surface 42 facing the vehicle interior side in the vehicle width direction.

  A positioning pin hole 50 is formed in a substantially central portion on a surface of the pillar side bracket shown in FIG. Further, pillar side bracket front / rear tightening bolt holes 52 are formed above and below, and front / rear tightening nuts 51 are welded to the back side thereof.

Next, a procedure for attaching the bracket 10 having a substantially U-shaped cross section will be described.
The bracket 10 having a substantially U-shaped cross section passes through the deck cross member 1 and is coupled to the end of the deck cross member 1. The bracket 10 having a substantially U-shaped cross section is welded and joined to the end portion of the deck cross member 1 at two locations of the deck cross member joint surface 16 and the deck cross member joint surface 17.

  The bracket 10 having a substantially U-shaped cross section is positioned by inserting the positioning pin 20 into the positioning pin hole 50 formed in the pillar side bracket 11. After the arrangement position is determined, the bracket 10 having a substantially U-shaped cross section passes the front and rear fastening bolts 12 through the front and rear fastening bolt holes 14 in front of the deck cross member 1 in the vehicle longitudinal direction. 11 is fastened and fixed to the pillar side bracket 11 with front and rear fastening nuts 51 welded to the pillar 11. Further, in the vehicle width direction, the lateral fastening bolt 13 is passed through the lateral fastening bolt hole 15 in the lower rear part of the deck cross member 1 and welded to the lateral fastening bolt 13 and the bracket-shaped member A having a substantially U-shaped cross section. The fastening nut 23 is fastened and fixed to the front pillar lower portion 4.

  Thus, the moment generated in the twisting direction of the deck cross member 1 can be suppressed by setting the lateral fastening position to the lower rear portion of the deck cross member 1, and the coupling rigidity between the deck cross member 1 and the front pillar lower portion 4 can be suppressed. Can be further strengthened.

  In addition, with the conventional lateral tightening type bracket, a plurality of locations must be bolted. After the door is mounted, the door is obstructed and cannot be constructed. It can be installed even after the door is installed by having one place.

  The bracket 10 having a substantially U-shaped cross section is composed of two members, a bracket-shaped member A having a substantially U-shaped cross section and a bracket-shaped member B having a substantially U-shaped cross section. The joining surface 24 is joined to the front pillar lower portion 4. The bracket-shaped member A having a substantially U-shaped cross section and the bracket-shaped member B having a substantially U-shaped cross section are joined by welding at the joining surface 30 and the joining surface 40, the joining surface 31 and the joining surface 41, and the joining surface 32 and the joining surface 42, respectively. .

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and it is obvious to those skilled in the art that there are various other embodiments within the scope of the present invention. it is obvious.

  For example, in the present embodiment, a bracket having a substantially U-shaped cross section has been described. However, a bracket having a substantially L-shaped cross section constituted by a surface bonded to the lower portion of the front pillar and a surface bonded to the pillar side is applied to the present invention. Also good.

It is a conceptual diagram which shows the deck cross member attachment structure which concerns on one Embodiment of this invention. It is a perspective view which shows the cross-sectional substantially U-shaped bracket which concerns on one Embodiment of this invention. It is a perspective view which shows the cross-sectional substantially U-shaped bracket structural member A which concerns on one Embodiment of this invention. It is a perspective view which shows the cross-sectional substantially U-shaped bracket structural member B which concerns on one Embodiment of this invention. It is a perspective view which shows the pillar side bracket which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Deck cross member 2 Front pillar 4 Front pillar lower part 10 Cross-sectional substantially U-shaped bracket 11 Pillar side bracket 12 Front and rear fastening bolt 13 Lateral fastening bolt 14 Front and rear fastening bolt hole 15 Lateral fastening bolt hole 18 Opening 23 Horizontal fastening nut 51 Front and rear fastening nut

Claims (2)

A bracket that extends in the vehicle width direction and is connected to the end of the deck cross member disposed on the vehicle interior side below the front pillar and disposed on the vehicle interior side below the front pillar ,
A positioning mechanism for determining an arrangement position when the bracket is arranged on the vehicle interior side under the front pillar ,
The bracket is coupled to the lower portion of the front pillar in two directions of the vehicle front-rear direction and the vehicle width direction after determining the arrangement position by the positioning mechanism .
The bracket has a substantially U-shaped cross section with an opening on the vehicle rear side, and an end of the deck cross member penetrates the bracket in the vehicle width direction and is coupled to the bracket.
The bracket is coupled to the lower part of the front pillar with a fastening member passed through the opening of the bracket,
The bracket includes a first bracket constituent member having a substantially U-shaped cross section in the vertical direction in the vehicle width direction and a second bracket constituent member having a substantially U-shaped cross section in the vertical direction in the vehicle width direction. deck cross member mounting structure, characterized in that it consists of members. In the deck cross member mounting structure according to claim 1 ,
The deck cross member mounting structure, wherein the bracket is coupled to the lower portion of the front pillar at two points in the vehicle longitudinal direction at the front and the rear of the deck cross member and at one point in the vehicle width direction at the rear of the deck cross member.

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