JP5969246B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front structure of a vehicle such as an automobile, and more particularly to an improved strut upper support rigidity by a simple and lightweight structure.

The McPherson strut suspension used as a front suspension for automobiles such as passenger cars supports the lower end of a hub bearing housing that rotatably supports wheels with a lower arm that is swingably attached to a vehicle body, The upper end portion is supported by a shock absorber (damper) and a strut with an assembled spring.
The upper part of the strut is attached to a strut support provided above the side of the engine room of the vehicle body.

In a vehicle having such a strut, there is a strong demand for improving the vehicle body rigidity of the strut support portion in order to improve traveling performance.
As a conventional technique for improving the rigidity of the strut support portion, for example, in Patent Document 1, a panel constituting the strut support portion extends along the wheel house panel, and is connected to the front pillar and the side sill, and is faced in the vehicle width direction. It is described that it is bonded to a side member formed in a panel shape.

JP 2007-50817 A

However, in the technique described in Patent Document 1 described above, the force in the vehicle width direction input to the strut support portion is transmitted as an input in the bending direction to the side member. It is difficult to escape and perform effective load transmission.
In view of the above-described problems, an object of the present invention is to provide a vehicle body front structure in which the support rigidity of the upper portion of the strut is improved by a simple and lightweight structure.

The present invention solves the above-described problems by the following means.
The invention according to claim 1 is a strut support portion to which a strut upper portion of a strut type front suspension is attached, a front pillar disposed in a vertical direction at a front end portion and a side end portion of a cabin, the strut support portion and the front pillar. And a front pillar provided in the vicinity of a connecting portion between the horizontal stiffening member formed in a panel shape arranged substantially along a horizontal plane and the horizontal stiffening member in the front pillar. An inner stiffening member , a skewed stiffening member that is connected to a portion of the front pillar above the horizontal stiffening member and the strut support portion, and is inclined with respect to the horizontal stiffening member; , End portions on the outer side in the vehicle width direction of the skew stiffening member and the horizontal stiffening member, and the outer side and front side of the front pillar in the vehicle width direction. A vehicle body front structure characterized by comprising a side gusset for coupling the Na portion.
According to a second aspect of the present invention, there is provided a strut support portion to which a strut upper portion of a strut type front suspension is attached, a front pillar disposed in a vertical direction at a front end portion and a side end portion of a cabin, the strut support portion, and the front pillar. And a front pillar provided in the vicinity of a connecting portion between the horizontal stiffening member formed in a panel shape arranged substantially along a horizontal plane and the horizontal stiffening member in the front pillar. An inner stiffening member, a skewed stiffening member that is connected to a portion of the front pillar above the horizontal stiffening member and the strut support portion, and is inclined with respect to the horizontal stiffening member; The front pillar includes an upper part inclined rearward so that the upper end part is on the rear side of the vehicle, and downward from the lower end part of the upper part. The oblique stiffening member is coupled to a bent part between the upper part and the lower part, and the oblique stiffening member is coupled to a bent part between the upper part and the lower part. It is a vehicle body front part structure characterized by being inclined substantially equivalent to the inclination.
According to these respective inventions, the struts a load input to the supporting portion, it is possible to transmit a force in the shear direction via the horizontal stiffening member to the front pillar, strut support portion of the displacement with respect to the cabin portion, Deformation can be suppressed and vehicle body rigidity can be improved to improve steering stability, ride comfort, and the like.
In addition, by connecting the rear end portion of the horizontal transmission member to a location where the front pillar internal stiffening member is provided in the front pillar, it is possible to prevent the cross section of the front pillar from being deformed by the input from the horizontal stiffening member.

Further, the slanting stiffening member cooperates with the horizontal stiffening member to form a strong truss-like structure, whereby the vehicle body rigidity can be further improved.
Moreover, even when the lower end portion of the portion adjacent to the front window glass and the strut support portion of the front pillar are separated in the height direction as in the SUV vehicle derived from the passenger car, the space between these Rigidity can be effectively improved.

The invention according to claim 3 includes a bulkhead that connects the left and right front pillars in the vicinity of the upper end portion of the engine room, and the bulkhead includes a front wall portion that extends upward from a front end portion of a bottom surface portion, and 2. The rear wall portion extending upward from the rear end portion of the bottom surface portion, and a connecting member that connects the upper end portion of the front wall portion and the upper end portion of the rear wall portion. 2 is a vehicle body front structure.
According to this, by partially closing the bulkhead whose upper part is open, it is possible to suppress the deformation of the vehicle body in the direction in which the upper part of the bulkhead is opened or twisted, and to further increase the rigidity of the vehicle body.

The invention according to claim 4 is the vehicle body front part structure according to claim 3, wherein a separator for partitioning the bulk head in a vehicle width direction is provided in a part of the bulk head.
According to this, the rigidity of the bulkhead can be further increased, and the vehicle body rigidity can be further improved.

The invention according to claim 5 is characterized in that a closed cross section extending substantially along the vehicle width direction is formed on the front wall portion of the bulkhead. It is a partial structure.
According to this, even if it is difficult to make the bulkhead itself closed as described above, due to the mounting of other parts, etc., it is possible to deform the bulkhead by increasing the rigidity of the front wall. Can be suppressed and the vehicle body rigidity can be improved.

According to a sixth aspect of the present invention, the front stiffener side end of the horizontal stiffening member is fixed to the outer surface of the front pillar and has a protruding surface that projects substantially horizontally toward the front side of the vehicle. The vehicle body front part structure according to any one of claims 1 to 5, further comprising a welded portion between the projecting surface portion and the projecting surface portion.
According to this, since the bracket is attached to the outer surface portion of the front pillar, there is no concern about water leakage due to the formation of an opening or the like on the surface of the front pillar.
Further, the bracket can be fixed by welding or the like before welding the panels constituting the front pillar to form a closed cross section.
In addition, since the load transmission from the horizontal stiffening member to the bracket is input as a load in the shear direction to the welded portions of both, it is easy to ensure the strength of the welded portions against the load in the tensile direction or the peel direction.

  As described above, according to the present invention, it is possible to provide a vehicle body front structure in which the support rigidity of the upper portion of the strut is improved by a simple and lightweight structure.

It is a perspective view of the Example of the vehicle body front part structure to which this invention is applied. It is an expansion perspective view of the vehicle body front part structure of FIG. It is the top view which looked at the vehicle body front part structure of FIG. 1 from upper direction. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is VI-VI part arrow directional cross-sectional view of FIG.

  The present invention provides a vehicle body front structure in which the support rigidity of the upper portion of the strut is improved by a simple and lightweight structure, and a panel disposed substantially along the horizontal direction between the strut support portion and the front pillar front surface. It was solved by connecting by a horizontal stiffening member.

Embodiments of a vehicle body front structure to which the present invention is applied will be described below.
The vehicle body front part structure of the embodiment is used for an automobile such as an SUV type passenger car, for example.
The vehicle body 1 includes a toe board 10, a bulkhead 20, a side upper frame 30, a strut support portion 40, a front pillar 50, a horizontal stiffening member 60, a bracket 70, a skew stiffening member 80, a hinge bracket 90, a side gusset 100, a bulk. The head separator 110, the bulkhead doubler 120, the front hood 130, the front fender 140, and the like are configured.
2 and 3, illustration of the skew stiffening member 80, the hinge bracket 90, the side gusset 100, and the like is omitted.
Further, the front hood 130 and the front fender 140 are illustrated only in FIG.

A toe board 10 shown in FIG. 1 and the like is a partition wall that is provided at a front end portion of a cabin that accommodates an occupant and the like and partitions an engine room and a vehicle compartment.
The lower end portion of the toe board 10 is formed continuously with a floor panel (not shown).
As shown in FIG. 6, the upper end portion of the toe board 10 is connected to the bottom surface portion 21 of the bulkhead 20.
The left and right end portions of the toe board 10 are connected to the front pillar 50.

The bulkhead 20 is a structural member that is provided on the top of the toe board 10 and arranged along the vehicle width direction.
As shown in FIG. 6, the bulkhead 20 is formed so that the front wall portion 22 and the rear wall portion 23 are raised upward from the front end portion and the rear end portion of the bottom surface portion 21, and the upper portion is opened. Yes.
For example, a wiper device, a washer device, and the like are accommodated in the bulk head 20.
An overhanging portion 24 that projects upward from the bulkhead 20 is connected to the upper end portion of the rear wall portion 23.
Further, as shown in FIG. 5, side portions 25 that substantially close the end of the bulkhead 20 are provided at both ends of the bulkhead 20 in the vehicle width direction.

The side upper frame 30 is a beam-like structural member that is disposed so as to protrude from the left and right ends of the bulkhead 20 toward the front side of the vehicle.
The side upper frame 30 is disposed along the side end portion of the front hood 130.
As shown in FIGS. 4 and 5, the side upper frame 30 is formed in a closed cross section in which the cross section viewed from the front-rear direction is substantially rectangular.
In addition, a separator (partition wall) 31 that divides the inside of the side upper frame 30 in the front-rear direction is provided in a region in the vicinity of the coupling portion with the skew stiffening member 80 inside the side upper frame 30.

The strut support portion 40 is attached to the upper end portion (strut upper mount) of the strut in the McPherson strut type front wheel suspension device.
The strut is an assembly of a shock absorber (damper) and a spring, and a lower end portion is fixed to an upper end portion of a hub bearing housing that rotatably supports a front wheel.
The strut support portion 40 is formed in a cup shape opened downward, and the upper end portion of the strut is fastened to the upper end surface thereof.
As shown in FIG. 6, the rear surface portion of the strut support portion 40 is fixed to the front surface of the toe board 10 by spot welding or the like.
The end of the strut support portion 40 on the outer side in the vehicle width direction is fixed to the upper surface portion of the side upper frame 30 and the front end portion (the overhang portion 61) on the inner side in the vehicle width direction of the horizontal stiffening member 60 by spot welding or the like. The

The front pillar (A pillar) 50 is a columnar structural member that is provided at a side end portion of the front portion of the cabin and is arranged extending in the vertical direction.
The upper portion 51 of the front pillar 50 is disposed along a side end portion of a front window glass (not shown), and is inclined rearward so that the upper end portion is on the vehicle rear side.
The lower part 52 of the front pillar 50 is disposed substantially along the vertical direction downward from the lower end part of the upper part 51.
The bent portion 53 provided between the upper portion 51 and the lower portion 52 of the front pillar 50 is disposed at a position higher than the strut support portion 40.

The lower part 52 of the front pillar 50 is provided with an upper hinge attaching part 54 and a lower hinge attaching part 55 to which a hinge (not shown) that supports an openable / closable front door is attached.
As shown in FIG. 5, the front pillar 50 includes an outer panel 501, an inner panel 502, phosphorus reinforcements 503 and 504, and the like.
The outer panel 501 is a panel constituting an outer surface portion of the front pillar 50 on the outer side in the vehicle width direction.
The inner panel 502 is a panel that forms an outer surface portion of the front pillar 50 on the inner side in the vehicle width direction.
The outer panel 501 and the inner panel 502 are configured in a so-called monaca shape, and are formed with a closed cross section as shown in FIG. 5 by joining the welding margins provided at the front and the rear by spot welding or the like. .

The welding locations on the front side of the outer panel 501 and the inner panel 502 are disposed at the inner end in the vehicle width direction at the front end of the front pillar 50.
Further, the welded portions on the rear side of the outer panel 501 and the inner panel 502 are provided at the rear end portion of the front pillar 50 and are disposed at the projecting end portions of the projecting portions projecting toward the vehicle rear side.
Further, the welded portion on the vehicle front side between the outer panel 501 and the inner panel 502 is also joined to the end portion on the vehicle width direction outer side of the rear wall portion 23 of the bulkhead 30 and the side surface portion 25.

The phosphorus reinforcement 503 is a stiffening panel arranged along the inner surface of the outer panel 501 from the welded portion on the vehicle rear side to the front side of the front pillar 50.
The phosphorus reinforcement 504 is a stiffening panel disposed on the outer side of the front pillar 50 in the vehicle width direction along the inner surface of the phosphorus reinforcement 503.
These phosphorus reinforcements 503 and 504 are provided around the upper hinge mounting portion 54 and the lower hinge mounting portion 55 in order to improve the rigidity of the front pillar 50 and to strengthen the cross-sectional constraint.
The configuration and arrangement of these phosphorus reinforcements are merely examples, and the stiffening inside the front pillar may be performed by other structures.

The horizontal stiffening member 60 is a sheet metal panel that constitutes the rear portion of the upper surface portion of the side upper frame 30, is formed substantially in a flat plate shape, and is disposed substantially along the horizontal direction.
The horizontal stiffening member 60 has a large plate thickness with respect to the other parts of the side upper frame 30, the side face part 25 of the bulkhead 20, the side gusset 100, and the like.
The horizontal stiffening member 60 connects the end of the strut support portion 40 on the outer side in the vehicle width direction and the front portion of the front pillar 50.
As shown in FIGS. 2, 3, etc., the horizontal stiffening member 60 has an overhanging portion 61 formed in an area inside the vehicle width direction at the front end portion thereof adjacent to the upper surface portion of the strut support portion 40. These are joined by spot welding or the like.
The rear end portion of the horizontal stiffening member 60 is fixed by spot welding or the like in a state where it abuts on an upper surface portion of a protruding surface portion 72 of a bracket 70 described later.

The bracket 70 is a member that is attached to the front surface portion of the front pillar 50 near the upper hinge attaching portion 54 by spot welding or the like and serves as a base portion to which the horizontal stiffening member 60 is fixed.
As shown in FIG. 4, the bracket 70 includes a pillar fixing portion 71 and a protruding surface portion 72.
The pillar fixing portion 71 is a surface portion that is formed in a flat plate shape and is fixed to the outer panel 501 and the phosphorus reinforcement 503 of the front pillar 50 by spot welding or the like.
This welding is performed before the outer panel 501 is joined to other panels to make a closed cross section.
The protruding surface portion 72 is a flat plate-like portion protruding from the upper end portion of the pillar fixing portion 71 toward the vehicle front side, and is disposed substantially horizontally.
The rear end portion of the horizontal stiffening member 60 is fixed to the projecting surface portion 72 by spot welding or the like while being placed on the upper surface of the projecting surface portion 72.

The oblique stiffening member 80 has a front end portion coupled to an end portion on the outer side in the vehicle width direction of the strut support portion 40 in the vicinity of the front end portion of the horizontal stiffening member 60, and a rear end portion coupled to the bent portion 53 of the front pillar 50. The vehicle body structural member.
The oblique stiffening member 80 is a beam-like member formed in a hat shape with a cross-sectional shape viewed from the front-rear direction of the vehicle and opened downward, and is inclined and disposed in a direction of lowering forward.
The inclination of the skew stiffening member 80 is substantially equal to the inclination of the upper portion 51 of the front pillar 50.

  The hinge bracket 90 is a base portion to which a hinge (not shown) that supports the front hood 130 so as to be openable and closable is attached.

  The side gusset 100 is a panel-like member that couples the end portions on the outer side in the vehicle width direction of the skew stiffening member 80 and the horizontal stiffening member 60 and the corner portion on the outer side and the front side in the vehicle width direction of the front pillar 50.

In the bulkhead separator 110, the upper part of the two partition plates that connect the front wall portion 22 and the rear wall portion 23 of the bulkhead 20 to partition the bulkhead 20 in the vehicle width direction is disposed substantially horizontally. It is a member formed in a gate shape or a U-shape in which a lower part is opened when viewed from the vehicle front-rear direction by being connected by an upper surface part.
The upper surface portion of the bulkhead separator 110 functions as a connecting member that connects the upper end portions of the front wall portion 22 and the rear wall portion 23.
With the configuration described above, the bulkhead separator 110 has a part of the bulkhead 20 having a closed cross section and a box shape to improve rigidity, and particularly suppress deformation in the direction in which the bulkhead 20 opens and twists.
The bulkhead separator 110 is provided, for example, at the center in the vehicle width direction.

The bulkhead doubler 120 is a sheet metal panel-like member that forms a closed cross section in a part of the front wall portion 22 in order to suppress deformation of the bulkhead 20 at a location where it is difficult to apply the separator as described above.
As shown in FIG. 6, the bulkhead doubler 120 has a main portion disposed on the rear side of the front wall portion 22 so as to face the front wall portion 22 with a space therebetween, and has an upper end portion and a lower end portion thereof. In this case, the front wall portion 22 is joined by spot welding or the like to form a closed cross section in the front wall portion 22.

The front hood 130 (see FIG. 4) is an exterior member provided in the upper part of the engine room, and is formed as an openable lid.
The front hood 130 is fastened to a hinge (not shown) whose rear end is fixed to the upper part of the hinge bracket 90.

  The front fender 140 (see FIG. 4) is an exterior member provided on the side of the front hood 130, and is a sheet metal formed so as to cover the periphery of the wheel house, the side upper frame 30, the lower portion of the front pillar 50, and the like. Panel made of.

According to the embodiment described above, the following effects can be obtained.
(1) Loads in the vehicle width direction and the vehicle front-rear direction input to the strut support portion 40 can be transmitted to the front pillar 50 as a force in the shear direction via the horizontal stiffening member 60, and the struts for the cabin portion The displacement and deformation of the support portion 40 can be suppressed, the vehicle body rigidity can be improved, and the steering stability, the ride comfort, etc. can be improved.
Further, by connecting the rear end portion of the horizontal transmission member 60 to the location where the phosphorus reinforcements 503 and 504 are provided in the front pillar 50, the cross section of the front pillar 50 is deformed by the input from the horizontal stiffening member 60, The power can be prevented from escaping.
(2) Since the skew stiffening member 80 is provided, the bent portion 53 of the front pillar 50 and the strut support portion 40 are separated from each other in the height direction as in an SUV vehicle derived from a passenger car. However, the rigidity between them can be effectively improved.
(3) The bulkhead separator 110 is partially closed in cross section and box-structured by the bulkhead separator 110, thereby suppressing deformation of the vehicle body in the direction in which the upper part of the bulkhead 20 opens or twisting, thereby improving vehicle body rigidity. Can be increased.
(4) If it is difficult to make the bulkhead 20 itself a closed cross-section because of other parts such as outfitting, a bulkhead doubler 120 is provided, and the front wall portion 22 is closed to increase rigidity. The deformation of the bulkhead 20 can be suppressed and the vehicle body rigidity can be improved.
(5) Since the bracket 70 for attaching the horizontal stiffening member 60 to the front pillar 50 is attached to the outer surface portion of the front pillar 50, there is a concern of water leakage or the like by forming an opening or the like in the outer panel 501 or the like of the front pillar 50. Absent.
The bracket 70 can be fixed by welding or the like before the panels 501 to 504 constituting the front pillar 50 are welded to form a closed cross section.
In addition, since the load transmission from the horizontal stiffening member 60 to the bracket 70 is input as a load in the shear direction to the welded portion of both, it is easy to ensure the strength of the welded portion against the load in the tensile direction or the peel direction. .
(6) By providing the separator 31 in the side upper frame 30 in the vicinity of the joint portion with the skew stiffening member 80, the local rigidity of the side upper frame 30 can be increased and the effect of each stiffening member can be promoted. it can.

(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.
The shape, structure, arrangement, plate assembly, joining method and the like of each member constituting the vehicle body front structure are not limited to the above-described embodiments, and can be changed as appropriate.
For example, in addition to the horizontal stiffening member and the skew stiffening member, another stiffening member may be added.
Further, when the bent portion of the front pillar exists at a position where the height difference is small with respect to the strut support portion, the skew stiffening member can be omitted.

DESCRIPTION OF SYMBOLS 1 Car body 10 Toe board 20 Bulkhead 21 Bottom face part 22 Front wall part 23 Rear wall part 24 Overhang part 25 Side part 30 Side upper frame 31 Separator 40 Strut support part 50 Front pillar (A pillar)
51 Upper part 52 Lower part 53 Bent part 54 Upper hinge attaching part 55 Lower hinge attaching part 501 Outer panel 502 Inner panel 503 Phosphorous reinforcement 504 Phosphorous reinforcement
60 Horizontal stiffening member 61 Overhang portion 70 Bracket 71 Pillar fixing portion 72 Projecting surface portion 80 Skew stiffening member 90 Hinge bracket 100 Side gusset 110 Bulkhead separator 120 Bulkhead doubler 130 Front hood 140 Front fender

Claims (6)

A strut support portion to which the strut upper part of the strut type front suspension is attached;
A front pillar disposed in the vertical direction at the front end and side end of the cabin;
A horizontal stiffening member formed in the shape of a panel that connects the strut support portion and the front portion of the front pillar and is disposed substantially along a horizontal plane;
A front pillar internal stiffening member provided in the vicinity of the coupling portion with the horizontal stiffening member in the front pillar ;
An oblique stiffening member that is connected to a portion of the front pillar that is above the horizontal stiffening member and the strut support, and is inclined with respect to the horizontal stiffening member;
Side gussets for connecting the outer ends of the skew stiffening members and the horizontal stiffening members in the vehicle width direction and the corner portions on the outer side and the front side of the front pillars;
Vehicle body front structure, characterized in that it comprises a.   A strut support portion to which the strut upper part of the strut type front suspension is attached;
  A front pillar disposed in the vertical direction at the front end and side end of the cabin;
  A horizontal stiffening member formed in the shape of a panel that connects the strut support portion and the front portion of the front pillar and is disposed substantially along a horizontal plane;
  A front pillar internal stiffening member provided in the vicinity of the coupling portion with the horizontal stiffening member in the front pillar;
  A portion of the front pillar above the horizontal stiffening member is connected to the strut support portion, and a skewed stiffening member disposed to be inclined with respect to the horizontal stiffening member,
  The front pillar has an upper part inclined rearward so that the upper end part is on the vehicle rear side, and a lower part arranged substantially along the vertical direction downward from the lower end part of the upper part,
  The skew stiffening member is disposed such that an end portion on the front pillar side is coupled to a bent portion between the upper portion and the lower portion, and is inclined substantially equal to the inclination of the upper portion.
  Body front structure characterized by A bulkhead that connects the left and right front pillars in the vicinity of the upper end of the engine room,
The bulkhead includes a front wall portion extending upward from a front end portion of a bottom surface portion, a rear wall portion extending upward from a rear end portion of the bottom surface portion, an upper end portion of the front wall portion, and a rear wall portion. The vehicle body front part structure according to claim 1, further comprising a connecting member that connects the upper end part. The vehicle body front part structure according to claim 3, wherein a separator for partitioning the bulk head in a vehicle width direction is provided in a part of the bulk head. The vehicle body front part structure according to claim 3 or 4, wherein a closed cross section extending substantially along a vehicle width direction is formed on the front wall part of the bulkhead. An end portion on the front pillar side of the horizontal stiffening member is fixed to the outer surface portion of the front pillar, and between the protruding surface portion of the bracket having a protruding surface portion protruding substantially horizontally toward the vehicle front side. The vehicle body front part structure according to any one of claims 1 to 5 , further comprising a welding portion .

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