CN109562794B - Vehicle body structure - Google Patents
Vehicle body structure Download PDFInfo
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- CN109562794B CN109562794B CN201780048931.0A CN201780048931A CN109562794B CN 109562794 B CN109562794 B CN 109562794B CN 201780048931 A CN201780048931 A CN 201780048931A CN 109562794 B CN109562794 B CN 109562794B
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- vehicle
- cowl
- panel
- frame
- front side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Provided is a vehicle body structure (1) which can absorb a collision load by deforming an expected portion at the time of a vehicle collision while suppressing an increase in the vehicle weight and the manufacturing cost. A reinforcement frame (60) is disposed on an inner panel surface (FR2) facing a vehicle interior (R2) within the range of a dash panel (10) and a floor panel (20) with a predetermined distance from a dash panel reinforcement member (80), at least a part of the reinforcement frame is overlapped with a front side frame (50) and extends in the vehicle front-rear direction, and the part between the dash panel reinforcement member (80) and the reinforcement frame (60) in the dash panel (10) and the front side frame (50) is set as a fragile part (17).
Description
Technical Field
The present invention relates to a vehicle body structure that continues from a floor panel to a dash panel.
Background
Conventionally, a vehicle body structure for alleviating a load applied to the lower limbs of a front seat passenger when a vehicle is deformed by a frontal collision has been considered.
For example, patent document 1 proposes a vehicle body structure including: two cowl cross members are arranged along the front and rear of a kick portion of a floor panel or a cowl panel (a bent portion between a horizontal portion of a floor surface at a lower limb of an occupant and an inclined portion of the floor surface inclined forward and upward from a front end of the horizontal portion), a front end of a reinforcement frame arranged above along the floor panel is coupled to the two cowl cross members to reinforce the kick portion, and a collision load transmitted to a cabin through a front side frame extending from a front portion of a vehicle is dispersed to the reinforcement frame and the cowl cross members at the time of a frontal collision.
In addition, with the vehicle body structure having such a reinforced kick portion, deformation of the lower limb portion of the occupant in the vehicle compartment is suppressed at the time of a frontal collision.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5924331
Disclosure of Invention
However, in the vehicle body structure of the reinforced kick portion of patent document 1, the kick portion does not deform at the time of a frontal collision, but a portion having low strength behind the reinforcing frame bends, and rotates with a large rotation radius about the portion having low strength as a fulcrum. Due to such rotation, the amount of deformation of the vehicle body portion close to the lower limb toward the lower limb is increased as compared with the case where the upper bent portion is the fulcrum. The vehicle body portion close to the lower limbs is a portion on the rear side of reference numeral 85a in fig. 1, and is a vehicle body portion facing the lower limbs on the outer side in the vehicle width direction. In the left-hand steering vehicle, a portion of the cowl-shaped lower structure or the floor on the left foot side corresponds to a portion of the cabin that protrudes toward the lower side. The portion of the reinforcement frame having low strength at the rear corresponds to a joint portion (a vicinity of a joint portion between the reinforcement frame and the side sill in fig. 1) of the reinforcement frame divided in the front-rear direction, positioning by press working, a drain hole of the electrodeposition paint (a hole in the upper surface of the reinforcement frame in fig. 1), and the like.
In a structure in which the strength is increased by increasing the plate thickness of the reinforcing frame or increasing the number of reinforcing members in order to reduce the amount of deformation toward the lower limbs, the vehicle weight increases and the manufacturing cost increases.
In addition, if the weak portions are gradually reinforced one by one, there is a possibility that deformation beyond the expectation occurs in unexpected portions.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vehicle body structure that can absorb a collision load by deforming an expected portion at the time of a vehicle collision while suppressing an increase in vehicle weight and manufacturing cost.
In order to achieve the above object, the present invention provides a vehicle body structure including: a dash panel formed of a plate-like member arranged along a vehicle width direction and partitioning a power compartment and a vehicle compartment; a floor panel that is formed of a plate-like member that is continuous with a lower edge of the dash panel and that constitutes a floor surface of the vehicle interior; a front side frame extending in a vehicle front-rear direction at least on an outer panel surface of the dash panel facing the power compartment; a reinforcement frame extending in the vehicle front-rear direction and at least partially overlapping the front side frame at least on an inner panel surface of the floor panel facing the vehicle compartment; and a cowl reinforcing member disposed on an inner panel surface facing a vehicle interior, wherein a front end of the reinforcing frame is disposed to the kick portion, the cowl reinforcing member includes a front side frame reinforcing portion disposed at least along the inclined portion of the front side frame, and the reinforcing frame and the front side frame reinforcing portion of the cowl reinforcing member are set as a weak portion with a predetermined interval therebetween.
Effects of the invention
According to the present invention, there is provided a vehicle body structure capable of absorbing a collision load by deforming an expected portion at the time of a vehicle collision while suppressing an increase in vehicle weight and manufacturing cost.
Drawings
Fig. 1 is a perspective view showing a driver seat portion of a vehicle body provided with a vehicle body structure of the present embodiment.
Fig. 2 is a perspective view of a vehicle body provided with the vehicle body structure of the present embodiment, as viewed from the lower surface side.
Fig. 3 is a sectional view taken along the line III-III of fig. 4.
Fig. 4 is a plan view showing a driver seat portion of a vehicle body provided with the vehicle body structure of the present embodiment.
Fig. 5 is a front view of a main part showing a passage part of the present embodiment.
Fig. 6 is a main part perspective view, as viewed from the vehicle compartment side, showing a connection structure of the side sill and the lower cowl cross.
Fig. 7 is a main part sectional perspective view seen from the vehicle exterior side showing a connection structure of the side sill and the lower cowl cross member.
Fig. 8 is a sectional view showing a state where the chassis base is mounted.
Fig. 9 is a plan view showing a driver seat portion of a vehicle body provided with the vehicle body structure of the present embodiment.
Fig. 10 is a main part sectional view showing a driver seat portion of a vehicle body provided with the vehicle body structure of the present embodiment.
Detailed Description
Embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate. The same components are denoted by the same reference numerals, and redundant description thereof is omitted.
As shown in fig. 1 and 2, a vehicle V including the vehicle body structure 1 of the present embodiment is provided with a power chamber R1 accommodating a power source such as an engine in a front portion of the vehicle body, and a vehicle chamber R2 in which a passenger sits is adjacent to a rear portion of the power chamber R1.
The vehicle V includes a dash panel 10, a floor panel 20, a side sill 30, a tunnel member 40, a front side frame 50, a reinforcement frame 60, a subframe 70, and a dash panel reinforcement member 80.
Since the vehicle body structure 1 is formed to be substantially bilaterally symmetrical, the following description will be made centering on a structure on the left side (driver seat side).
As shown in fig. 1 to 3, the dash panel 10 is formed of a plate-like member formed into a predetermined shape by press working or the like, and defines a power compartment R1 and a vehicle compartment R2, and forms a front end portion of the vehicle compartment R2.
The dash panel 10 includes a front panel portion 11, an inclined portion 12, a floor panel portion 13, a wheel cover portion 14, and a cutout portion 15.
The front plate portion 11 extends in the vehicle vertical direction and the vehicle width direction so that the plate surface faces the vehicle front-rear direction.
The inclined portion 12 is inclined downward toward the vehicle rear from the lower end of the front panel portion 11, and extends to the height of the floor surface of the vehicle compartment R2.
The floor portion 13 extends rearward from the lower end (rear end) of the inclined portion 12 substantially horizontally, and constitutes a part of the floor surface of the vehicle interior R2. Further, a bottom plate 20 is joined to a rear end portion of the floor portion 13. The bent portion between the inclined portion 12 and the floor portion 13 is referred to as an upward bent portion.
As shown in fig. 4, the wheel house portions 14 are set at both ends of the dash panel 10 in the vehicle width direction, and constitute a part of a wheel house (not shown) that covers an upper half of a front wheel (not shown) of the vehicle V. The wheel cover portion 14 is formed in a spherical shape bulging toward the vehicle interior R2 so as to straddle the front plate portion 11 and the inclined portion 12, and is a vehicle body portion close to the lower limbs.
The cutout 15 is formed by an コ -shaped cutout that opens downward at the center of the dash panel 10 in the vehicle width direction, and is formed in the range of the front panel 11, the inclined portion 12, and the floor 13. A duct member 40, which will be described later, is joined to the cutout portion 15.
The floor panel 20 is formed of a plate-like member formed into a predetermined shape by press working or the like, and constitutes a floor surface of the vehicle interior R2. Further, at the outer end edge in the vehicle width direction of the floor panel 20, a side sill 30 extends in the vehicle front-rear direction. Further, on the floor panel 20, at a central portion thereof in the vehicle width direction, a tunnel member 40 extends along the vehicle front-rear direction. Further, the reinforcing frame 60 extends in the vehicle longitudinal direction on a panel surface of the floor panel 20 on the vehicle interior R2 side between the side sill 30 and the tunnel member 40 in the vehicle width direction.
The side sill 30 shows an inner member, and is formed of a hollow member having a prismatic shape extending in the vehicle front-rear direction together with an outer member, not shown. The side sill 30 forms a side edge portion of the floor surface of the vehicle interior R2. Further, the front end portion of the side sill 30 is joined to the vehicle width direction end portions (left and right end portions) of the dash panel 10.
As shown in fig. 1, 2, and 5, the tunnel member 40 is provided at the center portion in the vehicle width direction of the floor panel 20 so as to extend in the vehicle front-rear direction.
The tunnel member 40 has a groove shape with a downwardly open cross section of approximately コ characters, which is formed by a top plate 41 extending in the vehicle width direction and a pair of side walls 42 extending downward from both end edges of the top plate 41 in the vehicle width direction.
Further, the passage member 40 is constituted by a front side passage 40F and a rear side passage 40R.
The front duct 40F is inclined so as to be located more downward as the top plate 41 goes rearward, and forms a groove shape (コ -shaped groove) together with the pair of side walls 42.
In addition, the front side tunnel 40F is provided with a tunnel support 43 at a central portion in the vehicle front-rear direction.
The passage support 43 is a structure for preventing the interval of the opening edge of the コ -shaped groove from being enlarged. The tunnel support 43 is composed of a ceiling reinforcing rib 44 formed on the ceiling plate 41 and a support member 45 disposed in an コ -shaped groove of the front tunnel 40F.
The roof bead 44 extends in the vehicle width direction at the center in the front-rear direction of the roof panel 41 of the front tunnel 40F, and is formed of a bead having a cross-section コ -shaped protruding toward the vehicle interior R2.
The support member 45 is a member obtained by bending a strip-shaped plate material into a コ shape so as to match the shape of the inner surface of the コ -shaped groove of the front side tunnel 40F, and is provided in a portion overlapping the roof bead 44 in the コ -shaped groove of the front side tunnel 40F.
The support member 45 is provided with support bead portions 46.
The support bead portion 46 extends from one side wall portion 42 to the other side wall portion 42 through the top plate portion 41 at the center portion in the width direction of the strip-shaped plate material, and is formed of a protrusion having a cross-sectional shape コ character which protrudes toward the opposite side of the vehicle interior R2. Also, a closed space is formed by the top plate bead portion 44 and the support bead portion 46.
The rear side tunnel 40R is continuous with the rear side of the front side tunnel 40F, and the ceiling portion 41 has a substantially horizontal コ -letter groove shape along the vehicle front-rear direction. Further, flange portions (not shown) extending outward from the inside of the groove shape are formed at the front end edge of the top plate portion 41 and the front end edges of the pair of side wall portions 42, and these flange portions are joined to the cutout portion 15 of the dash panel 10. Further, flange portions extending in the vehicle width direction from the opening edge portions of the groove shape (lower end edges of the side wall portions 42) are joined to the left and right bottom plates 20.
Further, a transmission shaft (not shown), an exhaust pipe (not shown), and the like are housed in the groove of the duct member 40.
As shown in fig. 1 and 2, the front side frame 50 is formed of a pair of members. The front side frames 50 are provided on the panel surface on the side of the power compartment R1 in the range from the dash panel 10 to the floor panel 20 so as to extend substantially parallel to each other in the vehicle front-rear direction with the tunnel member 40 interposed therebetween.
Each front side frame 50 includes a support arm 51 and a bent portion 52.
The support arm 51 is formed of a hollow frame member formed in a substantially quadrangular prism shape, is horizontally disposed along the vehicle longitudinal direction in the power chamber R1, and supports a power source device (not shown) such as an engine.
The bent portion 52 is formed continuously from the rear end of the support arm 51 to the kick-up portion, and extends in the vehicle front-rear direction on the outer panel surface FR1 facing the power compartment R1 in the range between the dash panel 10 and the floor panel 20. The bent portion 52 has a substantially コ -shaped groove shape in cross section that opens toward the outer panel surface FR1 facing the power compartment R1 in the range of the front end portions of the dash panel 10 and the floor panel 20, and a flange portion 52a that protrudes in the vehicle width direction from the edge portion of the groove shape opening is joined to the outer panel surface FR 1. The curved portion 52 forms a closed cross section having a quadrangular cross section together with the outer panel surface FR 1.
The bending portion 52 includes a mounting bracket 53 and reinforcing plates 54 and 55 (see fig. 3).
The mounting bracket 53 is a bracket for supporting the subframe 70, and is provided on the opposite side (the side of the power chamber R1) of a dash reinforcement member 80 (described later) across the dash panel 10.
The sub frame 70 supports the power source device together with the support wrist portion 51. When a load (collision load) equal to or greater than a set value is applied to the subframe 70 during a collision, the subframe 70 is detached from the mounting bracket 53, and the power source device is separated from the vehicle V.
The reinforcing plates 54 and 55 are disposed in the grooves of the bent portion 52, and the bent portion 52 is located on the opposite side of the portion where the flange portion 85a, which will be described later, is disposed with the dash panel 10 interposed therebetween. The reinforcing plates 54 and 55 are joined to both side walls and a bottom wall of the groove shape in the curved portion 52.
That is, the cowl reinforcing member 80 and the mounting bracket 53 are disposed so as to face each other, the reinforcing plates 54 and 55 are disposed between the flanges facing each other, and a rectangular parallelepiped closed space is formed in the bent portion 52.
As shown in fig. 1, 3, and 4, the reinforcement bracket 60 extends along the vehicle front-rear direction on an inner panel surface FR2 facing the vehicle interior R2 in the range of the kick-up portion of the dash panel 10 and the floor panel 20. The reinforcing frame 60 has a groove shape with a substantially コ -shaped cross section, in which the reinforcing frame main body 61 faces the floor panel 20 and opens downward, and is joined to the floor panel 20 via a flange portion 62 that extends in the vehicle width direction from an opening edge portion.
The front end portion of the reinforcement bracket 60 overlaps the rear end portion of the front side frame 50 in a plan view, and the reinforcement bracket 60 is disposed at a predetermined interval from the dash reinforcement member 80.
The reinforcing frame 60 is disposed so that the position in the vehicle front-rear direction of the front end portion (the end portion on the side close to the fragile portion 17) substantially coincides with the position in the vehicle front-rear direction of the front end portion (the end portion on the side of the cowl 10) of the side sill 30 (see an auxiliary line L1 in fig. 4).
In addition, the region between the cowl reinforcing member 80 and the reinforcing frame 60 in the cowl 10 and the front side frame 50 is set as the weak portion 17 (easy-to-deform region: region that deforms preferentially to the external force) having lower strength than other regions.
The cross-sectional area of the cross-section of the front end portion of the reinforcement bracket 60 and the cross-sectional area of the rear end portion of the front side frame 50 that face in the vehicle longitudinal direction at the overlapping portion are set smaller than the cross-sectional areas of the other portions.
On this basis, moreover, each of the groove shapes (height dimensions) smoothly changes so that the sum of the cross-sectional area of the closed cross-section formed by the front side frame 50 and the dash panel 10 and the cross-sectional area of the closed cross-section formed by the reinforcement frame 60 and the dash panel 1O is substantially constant in the vehicle front-rear direction.
As shown in fig. 4, the cowl reinforcing member 80 is configured by a plurality of reinforcing members (a center vertical frame 81, an upper cross member 82, a brake master cylinder attachment bracket 83, an upper cowl cross member 84, and a lower cowl cross member 85) arranged on an inner panel surface FR2 of the cowl 10.
The center vertical frame 81 is constituted by a pair of right and left members disposed across the tunnel member 40, and is disposed in parallel to the vehicle interior R2 side panel surface of the front panel 11 on an extension line L2 (in the vehicle vertical direction) of a ridge line portion constituting a boundary between the top panel 41 and the pair of side wall portions 42 of the tunnel member 40.
The center vertical frame 81 has a groove shape having a substantially コ -shaped cross section that opens forward toward the front plate portion 11, and is joined to the dash panel 10 via a flange portion 81a that extends in the vehicle width direction from an opening edge portion.
The upper cross member 82 is formed of a pair of left and right members disposed across the tunnel member 40, and is disposed on the vehicle interior R2 side panel surface of the front panel 11 on an extension line L3 (vehicle width direction) of a ridge line portion that is a boundary between the front end edge of the top panel 41 of the front tunnel 40F and the front panel 11.
The upper cross member 82 has a groove shape having a substantially コ -shaped cross section that opens forward toward the front plate portion 11, and is joined to the dash panel 10 via a flange portion 82a that extends in the vertical direction from the opening edge portion.
The brake master cylinder attachment bracket 83 is positioned on a front end side extension line (vehicle longitudinal direction) of the driver seat side reinforcement bracket 60, and is disposed on a vehicle interior R2 side panel surface of the front panel portion 11 in a state of being connected to a vehicle width direction outer side end portion of the upper cross member 82.
The cowl cross member 84 is formed of a pair of left and right members disposed across the tunnel member 40, and a vehicle-width-direction vehicle-inside end portion is located on a vehicle-compartment R2-side panel surface that is a boundary portion between the front panel portion 11 and the inclined portion 12, and is adjacent to a lower portion of the brake master cylinder attachment bracket 83.
The cowl cross member 84 is located on the wheel cover portion 14 from a boundary portion between the front plate portion 11 and the inclined portion 12 as it goes outward in the vehicle width direction.
The cowl cross member 84 has a groove shape having a substantially コ -shaped cross section that opens forward toward the cowl 10, and is joined to the cowl 10 via a flange portion 84a that extends in the vertical direction from an opening edge portion.
The cowl cross member 85 is formed of a pair of left and right members disposed across the tunnel member 40, and is disposed on the dash R2-side panel surface of the dash panel 10 in the vehicle width direction in a range from the side sill 30 to the front tunnel 40F. The lower cowl cross member 85 is positioned below (behind) the upper cowl cross member 84, and extends in the vehicle width direction on the inclined portion 12 along a boundary portion between the wheel cover portion 14 and the inclined portion 12.
The lower cowl cross member 85 has a groove shape having a substantially L-shaped cross section that opens forward toward the cowl 10, and is joined to the cowl 10 via a flange portion 85a that extends in the vertical direction from an opening edge portion. The cowl cross member 85 includes an outer flange portion 85b at an outer end in the vehicle width direction and an inner flange portion 85c at an inner end in the vehicle width direction.
As shown in fig. 6 and 7, the outer flange 85b is formed of a flap folded from an L-shaped vertical wall toward the vehicle rear. The outer flange portion 85b is inserted into the column of the side sill 30 from the front end of the side sill 30, and is joined to the end inner surface of the side sill 30.
The inner flange 85c is formed of a flap extending outward of the L-shape. The inner flange 85c is engaged with a portion of the front side duct 40F where the side wall portion 42 of the duct support 43 is provided.
That is, the driver seat side cowl cross member 85 and the passenger seat side cowl cross member 85 connect the left and right side sills 30 with the tunnel stay 43 interposed therebetween.
The cowl cross member 85 includes a bridge portion 85d extending upward (forward) so as to overlap the upper cross member 82 at a portion overlapping the front side frame 50 in a plan view.
Therefore, the brake master cylinder attachment bracket 83, the cowl cross member 84, the bridge 85d, and the cowl cross member 85 are continuous from the front (upper) toward the rear (lower) along the front side frame 50, and the reinforcing frame 60 extends through the fragile portion 17.
That is, the reinforcing member is disposed on the dash panel 10 and the floor panel 20 extending from the front side frame 50, except for the weakened portion 17, on the side panel surface of the vehicle interior R2.
As shown in fig. 8, the cowl reinforcing member 80 is a combination of the above-described reinforcing members to form a wheel house reinforcing portion 80A, a front side frame reinforcing portion 80B, and a steering shaft opening periphery reinforcing portion 80C.
The wheel house reinforcing portion 80A is formed as a quadrangular region surrounded by the upper and lower cowl cross members. The wheel house reinforcing portion 80A generates a reaction force when a small offset collision a (small area overlap collision) occurs.
The front side frame reinforcing portion 80B is formed by disposing the brake master cylinder attachment bracket 83 and at least a part of the upper and lower cowl cross members on the dash panel 10 and the floor panel 20 at the side panel surface of the cabin R2 where the front side frame 50 extends. The front side frame reinforcing portion 80B generates a reaction force against an external force applied to the front side frame in the full-face frontal collision B.
The steering shaft opening periphery reinforcing portion 80C is formed as a quadrangular region surrounded by the upper and lower cowl cross members, the brake master cylinder mounting bracket 83, the upper cross member 82, the center longitudinal frame 81, and the tunnel support 43.
The steering shaft opening periphery reinforcing portion 80C generates a reaction force when the power source device retreats in the power chamber R1 due to a collision and collides with the dash panel 10C.
Next, the operation of the vehicle body structure 1 according to the present embodiment at the time of a frontal collision will be described with reference to fig. 9.
A collision load is input to the front side frame 50 and the sub frame 70 due to a front collision such as a small offset collision or a full-face frontal collision, and these types of collisions.
When the magnitude of the collision load input to the front side frame 50 and the subframe 70 is equal to or greater than the set value, the subframe 70 is detached from the frame, and the front side frame 50 bends around the weak portion 17 (easily deformable region).
The collision load input to the front side frame 50 acts as a load that presses the front plate portion 11 of the dash panel 10 rearward via the support wrist portions 51.
At this time, when the input collision load is smaller than the predetermined value, the front side frame 50 and the dash panel 10 are elastically deformed such as deflected and then return to the shape before the collision. However, when the input collision load is larger than the predetermined value, the front side frame 50 and the dash panel 10 are bent at the weakened portion 17 having a lower strength than the other portions, and deformed into the shape indicated by reference numeral 50A.
When the collision load input to the subframe 70 exceeds a predetermined value different from the above, the subframe 70 is detached from the mounting bracket 53.
The vehicle body structure 1 of the present embodiment configured as described above has the following operational advantages.
In the vehicle body structure 1 of the present embodiment, the reinforcement frame 60 is disposed at a predetermined interval from the cowl cross member 85 (the front side frame reinforcement portion 80B of the cowl reinforcement member 80). In addition, the region between the dash panel 10 and the reinforcement bracket 60 in the dash panel 10 and the front side frame 50 is set as the weak portion 17 having lower strength than the other regions.
Thus, when a collision load is input to the front side frame 50 and the dash panel 10 in a collision of the vehicle V, the front side frame 50 and the dash panel 10 bend at the fragile portion 17, and the rotation radius is reduced compared to the bending deformation at the backward kick-up portion, thereby reducing the amount of deformation of the vehicle interior (the wheel house portion) to the lower limbs.
Further, since no reinforcing member is newly added to set the fragile portion 17, the vehicle weight and the manufacturing cost are not increased.
In the vehicle body structure 1 of the present embodiment, the cross-sectional area of the cross-section of the portion of the reinforcement bracket 60 and the front side frame 50 that overlap each other in the vehicle longitudinal direction is set smaller than the cross-sectional area of the other portions.
This can ensure sufficient rigidity against a collision load in the front-rear direction, reduce the weight of the reinforcing frame 60, and deform the fragile portion 17.
In the vehicle body structure 1 of the present embodiment, the cowl cross member 85 (the cowl reinforcing member 80) is disposed on the cowl 10 via the flange portion 85 a. Further, the front side frame 50 is provided with reinforcing plates 54, 55 on the opposite side of the portion where the flange portion 85a is disposed across the dash panel 10.
This can improve the rigidity of the periphery of the fragile portion 17 on the dash panel 10 side. Further, since the difference in rigidity between the fragile portion 17 and the periphery thereof is increased, the fragile portion 17 can be deformed more reliably by the collision load at the time of collision of the vehicle V.
In the vehicle body structure 1 of the present embodiment, the front side frame 50 includes the mounting bracket 53 that supports the sub frame 70 at a portion facing the cowl cross member 85 (the cowl reinforcing member 80) across the cowl 10.
By supporting the sub-frame 70 at the mounting bracket 53, the collision load at the time of collision of the vehicle V is input to the dash panel 10 via the sub-frame 70 in addition to the front side frame 50.
Thus, since the collision load is input to the dash panel 10 without being concentrated on one portion and dispersed, deformation at the input portion is suppressed, and deformation at the fragile portion 17 can be more reliably performed.
Further, since the collision load is input to the vicinity of the fragile portion 17, the region that can be deformed from the input portion to the fragile portion 17 is reduced, and the deformation in the fragile portion 17 can be further ensured.
In the vehicle body structure 1 of the present embodiment, the cowl cross member 85 (the cowl reinforcing member 80) has a groove shape having a substantially L-shaped cross section, and is disposed on the cowl 10 via the flange portion 85a provided at the opening edge of the groove shape.
Thus, a closed cross section of a triangle is formed by the lower cowl cross member 85 (the cowl reinforcing member 80) and the cowl 10.
Thus, the lower cowl cross member 85 (the cowl reinforcing member 80) can be arranged in a smaller installation space, and the rigidity can be stably exhibited regardless of the input direction of the collision load.
In the vehicle body structure 1 of the present embodiment, the reinforcing frame 60 is disposed such that the position in the vehicle front-rear direction of the front end portion (the end portion on the side close to the fragile portion 17) substantially coincides with the position in the vehicle front-rear direction of the front end portion (the end portion on the side of the dash panel 10) of the side sill 30 (see an auxiliary line L1 in fig. 4).
Therefore, the rigidity of the periphery of the fragile portion 17 on the floor panel 20 side can be improved against a collision in the vehicle front-rear direction.
This increases the difference in rigidity between the fragile portion 17 and the periphery thereof, and the fragile portion 17 can be deformed more reliably by the collision load at the time of collision of the vehicle V.
In the vehicle body structure 1 of the present embodiment, the outer flange portion 85b provided at the outer end in the vehicle width direction of the cowl cross member 85 (the cowl reinforcing member 80) is joined to the inner surface of the side sill 30, and the inner flange portion 85c provided at the inner end in the vehicle width direction is joined to the tunnel brace 43.
Thereby, the impact load input to the cowl cross member 85 (the cowl reinforcing member 80) is transmitted to the side sill 30 and the tunnel support 43, and therefore the impact energy that can be absorbed by the cowl reinforcing member 80 can be increased.
Further, in this way, in the cowl cross member 85 (the cowl reinforcing member 80), since the impact load at the time of collision of the vehicle V is input so as to rotate the front end portion of the side sill 30 at the center, it is possible to deform the fragile portion 17 more reliably.
In the vehicle body structure 1 of the present embodiment, the cowl reinforcing member 80 is configured by a plurality of reinforcing members, and each of the reinforcing members is disposed so that at least a part thereof overlaps the front side frame 50.
This enables the absorption of the collision load for the full offset frontal collision and the small offset collision (small-area overlap collision).
In the vehicle body structure 1 of the present embodiment, the dash panel 10 includes the floor portion 13, and the floor panel 20 is attached to the dash panel 10 via the floor portion 13.
Therefore, as shown in fig. 10, the floor panel 20 can be attached to the dash panel 10 in a state where the dash panel reinforcing member 80 is attached to the dash panel 10 in advance.
This reduces the number of manufacturing steps, improves productivity, and facilitates setting of the fragile portion 17.
In the vehicle body structure 1 of the present embodiment, each of the groove shapes smoothly changes so that the sum of the cross-sectional area of the closed cross-section formed by the front side frame 50 and the dash panel 10 and the cross-sectional area of the closed cross-section formed by the reinforcement frame 60 and the dash panel 10 is substantially constant in the vehicle front-rear direction.
Therefore, the rigidity unevenness in the vehicle front-rear direction can be reduced in the range from the front side frame 50 to the reinforcement frame 60.
This makes it possible to clearly define the difference in rigidity between the fragile portion and the other portions, and therefore, when a collision load is input, the fragile portion 17 can be more reliably deformed.
The front side frame reinforcing portion 80B may be a reinforcing plate disposed along the front side frame on the indoor side of the dash panel. In addition to the cowl top cross member 84, the cowl bottom cross member 85, and the bridge 85d of the embodiment, the bridge 85d may be extended from below the brake master cylinder mounting bracket 83.
Description of reference numerals
1 vehicle body structure
10 dash panel
12 inclined part
13 floor part
17 frangible portion
20 bottom plate
30 side sill
40 channel component
43 channel support
50 front side frame
52a flange portion
53 mounting bracket
54. 55 reinforcing plate
60 reinforcing frame
62 flange part
70 sub-frame
80 cowl reinforcing member
85a flange part
85b outer flange part
85c inner flange
FR1 external panel
FR2 interior panel
R1 power chamber
R2 vehicle cabin
Claims (8)
1. A vehicle body structure is provided with:
a dash panel formed of a plate-like member arranged along a vehicle width direction and partitioning a power compartment and a vehicle compartment;
a floor panel that is formed of a plate-like member that is continuous with a lower edge of the dash panel and that constitutes a floor surface of the vehicle interior;
a front side frame extending in a vehicle front-rear direction at least on an outer panel surface of the dash panel facing the power compartment;
a reinforcement frame that extends in a vehicle front-rear direction, and at least partially overlaps the front side frame at least on an inner panel surface of the floor panel that faces the cabin; and
a cowl reinforcement member provided on an inner panel surface facing the vehicle compartment,
the vehicle body structure is characterized in that,
the front end of the reinforcing frame is arranged to the upper bent part,
the cowl reinforcing member is disposed on the cowl via a flange portion provided to the cowl reinforcing member,
the cowl reinforcing member includes a front side frame reinforcing portion disposed at least along the inclined portion of the front side frame,
a weak portion is provided so that the reinforcement frame and the front side frame reinforcement portion of the cowl reinforcement member are arranged at a predetermined interval,
the front side frame is provided with a supporting wrist part and a bending part continuously formed to an upper bending part from the rear end of the supporting wrist part;
the front side frame includes a reinforcement panel on the opposite side of the dash panel from the portion where the flange portion is disposed,
the front side frame includes a mounting bracket supported by the reinforcement panel at a position facing the cowl reinforcement member with the cowl panel interposed therebetween,
the reinforcement plate is disposed between the cowl reinforcement member and the flange of the mounting bracket, and forms a rectangular closed space in the bent portion of the front side frame,
the mounting bracket supports a sub-frame extending in the vehicle front-rear direction in the power compartment in front of the weak portion.
2. The vehicle body structure according to claim 1,
the cross-sectional area of the cross section facing the vehicle front-rear direction at the portion where the reinforcement frame and the front side frame overlap each other is set smaller than the other portions of the reinforcement frame and the front side frame.
3. The vehicle body structure according to claim 1,
the cowl reinforcing member has a groove shape having a substantially L-shaped cross section,
the cowl reinforcing member is disposed on the cowl panel via a flange portion provided at an opening edge of the groove shape.
4. The vehicle body structure according to claim 1,
the floor panel is provided with a side sill extending in the vehicle longitudinal direction at an end portion in the vehicle width direction,
a position in the vehicle front-rear direction of an end portion of the reinforcement frame on a side close to the weak portion substantially coincides with a position in the vehicle front-rear direction of an end portion of the side sill on the cowl side.
5. The vehicle body structure according to claim 4,
a tunnel member having a groove shape that opens downward in a vehicle front-rear direction is provided at a vehicle width direction center portion of the dash panel,
the channel member is provided with a channel support member bent in a wave plate shape,
the cowl reinforcing member has an outer flange portion provided at an outer end in the vehicle width direction and joined to an inner surface of the side sill, and an inner flange portion provided at an inner end in the vehicle width direction and joined to the tunnel stay.
6. The vehicle body structure according to claim 1,
the cowl reinforcing member is constituted by a plurality of reinforcing members,
the reinforcing member is disposed so as to partially overlap with the front side frame.
7. The vehicle body structure according to claim 1,
the dash panel is provided with:
an inclined portion that is inclined downward from the power compartment side toward the vehicle compartment side; and
a floor portion extending substantially horizontally from the inclined portion,
the dash panel is connected to the floor panel via the floor portion.
8. The vehicle body structure according to claim 1,
the front side frame has a groove shape facing the cowl opening,
the reinforcement frame has a channel shape facing the cowl opening,
each of the groove shapes smoothly changes such that the sum of the cross-sectional area of the closed cross-section formed by the front side frame and the dash panel and the cross-sectional area of the closed cross-section formed by the reinforcing frame and the dash panel is substantially constant in the vehicle front-rear direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-155362 | 2016-08-08 | ||
| JP2016155362 | 2016-08-08 | ||
| PCT/JP2017/019881 WO2018029941A1 (en) | 2016-08-08 | 2017-05-29 | Vehicle body structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109562794A CN109562794A (en) | 2019-04-02 |
| CN109562794B true CN109562794B (en) | 2021-12-24 |
Family
ID=61161939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780048931.0A Expired - Fee Related CN109562794B (en) | 2016-08-08 | 2017-05-29 | Vehicle body structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109562794B (en) |
| WO (1) | WO2018029941A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6861751B2 (en) * | 2019-03-27 | 2021-04-21 | 本田技研工業株式会社 | Body front structure |
| WO2020217085A1 (en) | 2019-04-23 | 2020-10-29 | Arcelormittal | Tunnel having integrated lateral reinforcements |
| CN111619670B (en) * | 2019-09-19 | 2021-07-13 | 长城汽车股份有限公司 | Front vehicle body structure and automobile |
| KR20220077444A (en) * | 2020-12-02 | 2022-06-09 | 현대자동차주식회사 | Dash panel structure for vehicle |
| JP7201736B2 (en) * | 2021-04-30 | 2023-01-10 | 本田技研工業株式会社 | car body structure |
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| US6361102B1 (en) * | 2000-11-01 | 2002-03-26 | Hyundai Motor Company | Front automotive reinforcement structure for distributing impact force |
| JP2004130976A (en) * | 2002-10-11 | 2004-04-30 | Daihatsu Motor Co Ltd | Vehicle body front part structure for automobile |
| JP2011255816A (en) * | 2010-06-10 | 2011-12-22 | Honda Motor Co Ltd | Vehicle front body structure |
| CN102730085A (en) * | 2011-03-30 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | Floor structure of a motor vehicle body |
| CN103249637A (en) * | 2010-12-24 | 2013-08-14 | 本田技研工业株式会社 | Automobile body structure |
| CN103339020A (en) * | 2011-01-26 | 2013-10-02 | 本田技研工业株式会社 | Structure for front of vehicle body |
| JP2014213762A (en) * | 2013-04-26 | 2014-11-17 | マツダ株式会社 | Front vehicle body structure of vehicle |
| CN104203724A (en) * | 2012-03-26 | 2014-12-10 | 马自达汽车株式会社 | Front subframe structure of automobile |
| US9266567B1 (en) * | 2014-10-21 | 2016-02-23 | Toyota Motor Engineering & Manufacturing North America, Inc. | Vehicles having a dash panel reinforcement gusset |
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2017
- 2017-05-29 CN CN201780048931.0A patent/CN109562794B/en not_active Expired - Fee Related
- 2017-05-29 WO PCT/JP2017/019881 patent/WO2018029941A1/en active Application Filing
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|---|---|---|---|---|
| US6361102B1 (en) * | 2000-11-01 | 2002-03-26 | Hyundai Motor Company | Front automotive reinforcement structure for distributing impact force |
| JP2004130976A (en) * | 2002-10-11 | 2004-04-30 | Daihatsu Motor Co Ltd | Vehicle body front part structure for automobile |
| JP2011255816A (en) * | 2010-06-10 | 2011-12-22 | Honda Motor Co Ltd | Vehicle front body structure |
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| CN103339020A (en) * | 2011-01-26 | 2013-10-02 | 本田技研工业株式会社 | Structure for front of vehicle body |
| CN102730085A (en) * | 2011-03-30 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | Floor structure of a motor vehicle body |
| CN104203724A (en) * | 2012-03-26 | 2014-12-10 | 马自达汽车株式会社 | Front subframe structure of automobile |
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| US9266567B1 (en) * | 2014-10-21 | 2016-02-23 | Toyota Motor Engineering & Manufacturing North America, Inc. | Vehicles having a dash panel reinforcement gusset |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109562794A (en) | 2019-04-02 |
| WO2018029941A1 (en) | 2018-02-15 |
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