JP2012111249A - Front body of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable collar nuts to fall off further easily from outrigger front parts.SOLUTION: A front body of a vehicle includes right and left side sills 14 extended from right and left front side frames 16, 16 to rear side of a vehicle body via outriggers 25 and front sub frames 23 suspended from the right and left front side frames 16, 16. In this front body, each of the outriggers 25 has an outrigger front part 101, which inclines downward toward rear side along dash board lower panel 19 in a side view, and an outrigger rear part 102, which curves outside from the rear end 101b of the outrigger front part 101 in a planar view and is extended horizontally in the side view and connected to the right and left side sills 14. On each outrigger front part 101, the collar nut 112 is arranged to fasten the rear part of the front sub frames 23 with a bolt 111 and a tunnel frame 27 is branched that inclines toward inside the rear side and extended in the longitudinal direction along a tunnel part 18.

Description

  The present invention is directed to a front of a vehicle including left and right side sills that extend from the left and right front side frames to the rear of the vehicle body via an outrigger, and a front subframe that is suspended from the left and right front side frames and supports the engine. Related to body parts.

  The front body of the vehicle includes a first connecting member (collar nut) supported on the front side member (front side frame) side, a second connecting member (bolt) for attaching a cross member to the first connecting member, a first First support means for supporting the connecting member on the front side member and dropping the first connecting member together with the cross member from the front side member when a predetermined impact force is input to the cross member along the longitudinal direction of the vehicle body. Bracket) and second support means (support member), and a reinforcing member that is provided on the front side member and reinforces the position immediately after the direction of application of the impact force rather than the position where the first connecting member is supported.

  According to the front vehicle body of the vehicle, the cross member can be dropped from the front side member when a front collision load is input to the vehicle body (see, for example, Patent Document 1).

Japanese Patent No. 4325351

In the front vehicle body of the vehicle of Patent Document 1, the cylindrical portion of the first connecting member (color nut) is supported by the inclined second support means (support member).
For example, when a load is applied in the vertical direction of the vehicle body, the vertical swing of the color nut is greater than when the cylindrical portion of the color nut is supported vertically. Further, when a load is applied in the longitudinal direction of the vehicle body, the runout of the collar nut in the front-rear direction is larger than when the cylindrical portion of the collar nut is supported vertically. That is, since the collar nut is supported while the support member is inclined, the support rigidity of the cross member (or front subframe) attached to the collar nut is low.

As described above, when a load is applied in the longitudinal direction of the vehicle body, the deflection of the collar nut in the front-rear direction is larger than when the cylindrical portion of the collar nut is supported vertically. Therefore, when a front collision (front collision) occurs, it is difficult for stress to concentrate on the collar nut. That is, the support member is not easily broken.
Therefore, in order to concentrate the stress on the collar nut and break the support member, a reinforcing member is separately required. With this, the weight of the vehicle body cannot be reduced.

  It is an object of the present invention to provide a front body of a vehicle that can easily drop a color nut from the front part of an outrigger, drop a front subframe from the front side frame, and sufficiently buckle the front side frame. And

  The invention according to claim 1 includes left and right front side frames extending in the longitudinal direction of the vehicle body, a dashboard lower panel extending in the vehicle width direction and partitioning the engine room and the passenger compartment, and left and right front side frames. Left and right side sills that extend to the rear of the vehicle body via the outriggers, front subframes that are suspended from the left and right front side frames and support the engine, a floor panel that extends rearward from the dashboard lower panel, and In the front vehicle body of the vehicle provided with a tunnel portion formed in the center and extending in the longitudinal direction of the vehicle body, an outrigger front portion inclined downward toward the rear along the dashboard lower panel in a side view on the outrigger, Curved outward from the rear end of the outrigger front in plan view and side view A rear portion that extends horizontally and is connected to a side sill, and the front portion of the outrigger is provided with a color nut that fastens the rear portion of the front sub-frame with a bolt, and is inclined toward the rearward inner side to form a tunnel portion. A tunnel frame extending in the front-rear direction along the line is branched.

  The invention according to claim 2 is characterized in that the width of the outrigger is gradually enlarged in a plan view from the front end of the front portion of the outrigger to the rear end of the rear portion of the outrigger, and the cross-sectional area is increased toward the rear. .

  The invention according to claim 3 is characterized in that the outrigger has a hat cross section, and a horizontal connecting member for connecting the left and right side walls of the outrigger front is provided on the outrigger front.

  The invention according to claim 4 is provided with an outrigger opening through which the collar nut penetrates, a bracket that supports the lower portion of the collar nut, and a support member that supports the upper portion of the collar nut at the bottom of the hat cross section of the front portion of the outrigger. The bracket is provided with a horizontal part on the bracket side parallel to the front and rear direction for supporting the lower part of the color nut, and the support member is provided with a horizontal part on the support side parallel to the front and rear direction for supporting the upper part of the color nut. The bracket-side horizontal portion and the support-side horizontal portion that are parallel to the front-rear direction are supported orthogonally and are disposed so as to penetrate the outrigger opening.

  The invention according to claim 5 is characterized in that a stiffener for reinforcing the opening of the hat cross section is provided at the front part of the outrigger.

The present invention has the following effects.
In the first aspect of the present invention, the left and right front side frames extending in the longitudinal direction of the vehicle body and the dashboard lower panel extending in the vehicle width direction and partitioning the engine room and the vehicle compartment are provided on the front body of the vehicle. The left and right side sills that extend from the left and right front side frames to the rear of the vehicle body via the outriggers, the front subframe that is suspended from the left and right front side frames and supports the engine, and the floor that extends rearward from the dashboard lower panel A panel, and a tunnel portion formed in the center of the floor panel and extending in the longitudinal direction of the vehicle body.
The outrigger has a front part that slopes downward and rearward along the dashboard lower panel in a side view, and is curved outward from the rear end of the front part of the outrigger in a plan view and is extended horizontally in a side view. And an outrigger rear portion connected to the rear portion.
Collar nuts that fasten the rear part of the front subframe with bolts are arranged at the front part of the outrigger, and the tunnel frame that inclines toward the rearward inner side and extends in the front-rear direction along the tunnel part is branched forward. When (front collision) occurs, the load is branched from the front part of the outrigger via the rear part of the outrigger to the side sill and from the front part of the outrigger to the tunnel frame. Therefore, the stress can be concentrated on the collar nut disposed in the front part of the outrigger. As a result, the collar nut can be easily removed from the front part of the outrigger, the front subframe can be removed from the front side frame, and the front side frame can be sufficiently buckled. As a result, it is possible to improve the impact absorbing performance of the front vehicle body of the vehicle.

  In the invention according to claim 2, since the width of the outrigger is gradually enlarged in plan view from the front end of the outrigger front to the rear end of the rear of the outrigger, and the cross-sectional area is increased toward the rear, the rear of the color nut The outrigger has a larger cross-sectional area than the front. Therefore, stress can be easily concentrated on the collar nut at the time of the front collision.

  In the invention according to claim 3, since the outrigger has a hat cross section and the horizontal connecting member for connecting the left and right side walls of the outrigger front part is provided at the front part of the outrigger, the lateral opening of the hat cross section at the time of the front collision Can be prevented. As a result, the support rigidity of the front subframe can be increased, and the front side frame can be easily buckled.

In the invention according to claim 4, an outrigger opening through which the collar nut passes, a bracket that supports the lower portion of the collar nut, and a support member that supports the upper portion of the collar nut are provided at the bottom of the hat cross section of the front portion of the outrigger. It is done.
In addition, the bracket includes a bracket-side horizontal portion parallel to the front-rear direction that supports the lower portion of the collar nut, and the support member includes a support-side horizontal portion parallel to the front-rear direction that supports the upper portion of the collar nut.
Since the collar nut is supported orthogonally between the bracket-side horizontal part and the support-side horizontal part parallel to the front-rear direction and is disposed so as to penetrate the outrigger opening, the support rigidity of the front subframe can be further increased. The support member can be easily deformed by the collar nut at the time of the front collision, and the collar nut can be easily broken off.

  In the invention which concerns on Claim 5, since the stiffener which reinforces the opening part of a hat cross section was provided in the outrigger front part, stress can be concentrated on a support member and a support member can be fractured easily.

1 is a perspective view showing a front vehicle body of a vehicle according to the present invention. FIG. 2 is an exploded perspective view of a front vehicle body of the vehicle shown in FIG. 1. It is a perspective view which shows the principal part of the front vehicle body of the vehicle shown by FIG. It is a top view which shows the state which the front part vehicle body of the vehicle shown by FIG. 1 decomposed | disassembled. FIG. 2 is a plan view of a front vehicle body of the vehicle shown in FIG. 1. FIG. 2 is a perspective view around a joint cover of a front body of the vehicle shown in FIG. 1. It is the perspective view seen from the room inner side around the joint cover of the front vehicle body of the vehicle shown in FIG. It is a top view which shows the outrigger of the front vehicle body of the vehicle shown by FIG. It is a perspective view which shows the outrigger of the front vehicle body of the vehicle shown by FIG. It is a side view which shows the outrigger of the front part vehicle body of the vehicle shown by FIG. It is the 11-11 line sectional view of FIG. It is a perspective view of the stiffener of the front vehicle body of the vehicle shown in FIG. It is a perspective view of the horizontal connection member of the front vehicle body of the vehicle shown in FIG. It is a perspective view of the bracket of the front vehicle body of the vehicle shown in FIG. It is a perspective view of the support member of the front vehicle body of the vehicle shown in FIG. FIG. 16 is a cross-sectional view taken along line 16-16 in FIG. 15.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  As shown in FIGS. 1 to 3, the vehicle 10 is mounted on the vehicle body 11 at the rear of the vehicle body of the left and right front side frames 16, 16 extending in the vehicle body front-rear direction and the left and right front side frames 16, 16. Left and right side sills 14, 14 (one not shown) provided, a dashboard lower panel 19 that extends in the vehicle width direction and partitions the engine room 13 and the vehicle compartment 12, and a floor panel that extends from the rear of the dashboard lower panel 19 17, a center tunnel (tunnel portion) 18 extending in the longitudinal direction of the vehicle body at the center of the floor panel 17, and an opening 74 for inserting the steering shaft 21 (see FIG. 6) provided on the dashboard lower panel 19 on the engine room 13 side. ) And the engine room 1 of the dashboard lower panel 19. To the side sill 14, 14 (one not shown) from the cross member 24 provided on the side and passed to the left and right front side frames 16, 16 and the inclined portions 32, 32 provided behind the left and right front side frames 16, 16. Left and right outriggers 25, 25 (one not shown) to be coupled, left and right floor frames 26, 26 extending rearward from the inclined portions 32, 32 (one not shown) of the left and right front side frames 16, 16, Are supported by left and right tunnel frames (center frames) 27 and 27 which are curved inward from the inclined portions 32 and 32 of the front side frames 16 and 16 and extend to the rear of the vehicle body, and left and right front side frames 16 and 16. And a front subframe 23 (suspended).

A gear box 28 for turning the wheel is provided at the lower end of the steering shaft 21.
The dashboard lower panel 19 and the cross member 24 are disposed near the rear end of the horizontal portion 31 of the front side frame 16.

  The front side frame 16 includes a horizontal portion 31 that extends substantially horizontally in the engine room 13, and an inclined portion 32 that is inclined downward from the horizontal portion 31 toward the rear of the vehicle body and is coupled to the side sill 14 via the outrigger 25. . The outrigger 25 has a divergent shape that widens from the inclined portion 32 toward the side sill 14.

  The horizontal portion 31 is a frame having a closed cross section formed by joining a main body 34 having a hat shape in cross section and a lid member 36 that is substantially flat in cross section in the main body 34. That is, the cross-sectionally hat-shaped main body 34 includes an upper surface 34a, a lower surface 34b, a side surface 34c, an upper flange 34d, and a lower flange (not shown), and the lid member 36 is joined to the upper flange 34d and the lower flange (not shown). The

  The inclined portion 32 is a substantially U-shaped frame that is open at the top. The inclined portion 32 that is the rear end of the front side frame 16 is inclined downward toward the rear of the vehicle body, and is coupled to the side sill 14 via an outrigger 25 having a divergent shape.

  That is, as shown in FIG. 1, when a front collision load acts on one front side frame 16 as indicated by arrow a1, the front collision load is applied to one side sill 14 via one outrigger 25 as indicated by arrow a2. And the load is transmitted to the other outrigger 25 as indicated by an arrow a3 through the cross member 24, and the front impact load from the outrigger 25 to the other side sill 14 can be dispersed as indicated by an arrow a4. .

  As shown in FIGS. 2 and 3, in the horizontal portion 31 of the front side frame 16, a frame side stiffener 41 for reinforcing the front side frame 16 and front and rear frames for attaching an engine mount (not shown). Side brackets 42 and 43 are provided.

  A front mount portion 45 that supports the front subframe 23 is provided below the front portion of the horizontal portion 31, and an intermediate mount portion 46 that supports the front subframe 23 is provided below the rear portion of the horizontal portion 31, A rear mount portion 47 that supports the front subframe 23 is provided on the outrigger front portion 101 connected to the lower side of the inclined portion 32.

Further, the front side frame 16 is folded at a predetermined position when a collision load acts on the front side frame 16 outside the horizontal portion 31 and between the frame side stiffener 41 and the cross member extension 51. A turning point 53 to be bent is set.
The left front side frame 16 is a member that is substantially symmetrical to the right front side frame 16.

  As shown in FIGS. 6 and 7, the dashboard lower panel 19 includes a dashboard-side tunnel portion 54 that is continuously connected to a center tunnel (not shown) in the center of the lower portion, and a dashboard in which the steering shaft 21 is inserted. A board-side opening 55, a left welding opening 56 for welding the left cross member 65 and the left cross member extension 51, and a right cross member 66 and a right cross member extension 51 for welding. A right welding opening 57 is formed.

  That is, the left and right cross member extensions 51 and 51 and the left and right cross members 65 and 66 are spot-welded through the left and right welding openings 56 and 57 provided in the dashboard lower panel 19, respectively. Thereby, a spot welding location can be increased and bond strength can be improved.

The dashboard lower panel 19 is provided with gussets 61 and 61 on the side of the vehicle width on the side of the passenger compartment 12, and a vertical reinforcing member 62 is coupled to the center of the vehicle width on the side of the passenger compartment 12.
The gusset 61 is a member having a concave shape in cross section. The front end 61a of the gusset 61 is coupled to the cross member extension 51 via the dashboard lower panel 19 (pinched), and the rear end 61b of the gusset 61 is coupled to a front pillar (not shown).

  The longitudinal reinforcing member 62 is a member having a hat shape in sectional view. An upper end 62 a of the vertical reinforcing member 62 is coupled to a dashboard upper (not shown), and a lower end 62 b of the vertical reinforcing member 62 is coupled to the right cross member 66. That is, the vertical reinforcing member 62 reinforces the dashboard lower panel 19 by crossing the cross member 24.

  For example, if the lower end 62b of the longitudinal reinforcing member 62 on the vehicle compartment 12 side extends beyond the cross member 24 to the dashboard side tunnel portion 54 and further to the tunnel frames (center frames) 27 and 27, the front impact load is further increased. Support strength can be improved.

  A cross member 24 (left and right cross members 65 and 66), a cup-shaped joint cover 22, and left and right cross member extensions 51 and 51 are provided on the engine lower side of the dashboard lower panel 19. Yes.

As shown in FIGS. 1 and 6, the cross member 24 is divided into a left cross member 65 and a right cross member 66.
The left cross member 65 is a member having a hat shape in sectional view. Shorter than the right cross member 66. By arranging the cross member 24 on the left and right front side frames 16, 16, the load transmission at the time of collision is smoothly distributed to the left and right of the dashboard lower panel 19.

The right cross member 66 is a member having a hat shape in sectional view. That is, an upper surface 66a, a lower surface 66b, a front surface 66c, an upper flange 66d, and a lower flange 66e are provided.
An end portion (right cross member end portion) 71 on the inner side of the right cross member 66 is connected to the right flat surface 79 of the cup-shaped joint cover 22. A right cross member extension (connecting member) 51 coupled to the dashboard lower panel 19 and the right front side frame 16 is connected to an end 72 (see FIG. 1) outside the vehicle width.

  The left cross member 65 is a member having a hat shape in sectional view. That is, an upper surface 65a, a lower surface 65b, a front surface 65c, an upper flange 65d, and a lower flange 65e are provided.

  An end portion (left cross member end portion) 68 on the inner side of the left cross member 65 is connected to the left flat surface 78 of the cup-shaped joint cover 22. A left cross member extension (connecting member) 51 coupled to the dashboard lower panel 19 and the left front side frame 16 is connected to the end portion 69 outside the vehicle width.

  The cup-shaped joint cover 22 includes a bottom surface 75 in which an opening 74 is formed, a peripheral wall 76 extending from the bottom surface 75 toward the dashboard lower panel 19, an annular flange 77 formed at the tip of the peripheral wall 76, and a peripheral wall 76. Left and right flat surfaces 78 and 79 formed to be flat.

  The annular flange 77 is coupled to the dashboard lower panel 19. As described above, the left and right flat surfaces 78 and 79 have left and right cross member end portions (an inner end portion in the vehicle width of the left cross member 65 and an inward portion in the vehicle width of the right cross member 66). Edges 68 and 71 are connected to each other.

As shown in FIG. 2, the cup-shaped joint cover 22 protrudes forward from the left and right cross members 65 and 66.
Further, the cup-shaped joint cover 22 is made of a material having a lower tensile strength than the left and right cross members 65 and 66 in order to facilitate deformation. Further, in order to improve energy absorption, a material having a thickness greater than that of the left and right cross members 65 and 66 is employed. For example, the cup-shaped joint cover 22 is formed of a normal steel plate (equivalent to a tensile strength of 270 MPa, a plate thickness t1.8). The left and right cross members 65 and 66 are formed of a high-tensile steel plate (equivalent to a tensile strength of 440 MPa, a plate thickness t1.4).

  As shown in FIGS. 1 to 3, the cross member extension 51 is a member that couples from the front side frame 16 to the dashboard lower panel 19 and the right cross member 66, and is stable in the event of an offset collision. It works to promote the breakage.

  Further, it can be said that the cross member extension 51 is arranged behind the break point 53. That is, by reinforcing the front and rear of the folding point 53 with the frame side stiffener 41 and the cross member extension 51, the cross member extension 51 behind the folding point 53 (from the upper surface 34a of the front side frame 16 to the dashboard lower panel 19 and the cross member). The member joined to 24) does not deform.

  Thereby, stress can be concentrated on the break point 53. As a result, the collision mode is reliably controlled at the set position of the break point 53. Furthermore, the cross-section collapse behind the break point 53 is prevented.

  Further, it can be said that the cross member extension 51 is supported by the cross member 24 (the left and right cross members 65 and 66) and the gussets 61 and 61 joined to the dashboard lower panel 19.

  The cross member 24 is obtained by sandwiching the cup-shaped joint cover 22 between the left and right cross members 65, 66. The cross member 24 includes the left and right cross members 65, 66 and the cup-shaped joint cover 22. It can also be seen as being composed.

  Specifically, the right cross member extension 51 includes a main body portion 81 that constitutes an upper portion, a bending portion 82 in which a rear inner portion of the main body portion 81 is bent upwardly toward the right cross member 66, and a main body. An outer joint portion 83 (see FIG. 1) that is bent upward from the vehicle width outer side of the portion 81, an inner joint portion 84 that is bent downward from the vehicle width inner side of the main body portion 81, a bending portion 82, and The cross member joining portion 85 is formed inside the vehicle width of the inner joining portion 84, and the rear joining portion 86 is formed by bending from the main body portion 81 and the bending portion 82. For example, the right cross member extension 51 is formed of a high-tensile steel plate (equivalent to a tensile strength of 590 MPa, plate thickness t1.4).

  The front portion of the main body portion 81 is joined to the upper surface of the horizontal portion 31. The outer joint portion 83 is joined to the upper flange of the horizontal portion 31. The inner joint portion 84 is joined to the side surface 34 c of the horizontal portion 31. The cross member joining portion 85 is joined to the upper surface and the lateral surface of the right cross member 66. The rear joint 86 is joined to the dashboard lower panel 19 and the upper flange 66d of the right cross member 66.

  In the vehicle body 11, a stable folding mode is controlled at the time of an offset collision by using a cross member extension 51 for coupling the front side frame 16 to the dashboard lower panel 19 and the cross member 24.

  Further, by replacing the cross member extension 51, the front side frame 16 can be used for different vehicle bodies, and the front side frame 16 can be shared. Further, the shape of the front side frame 16 can be simplified, and the productivity in the press working of the front side frame 16 can be improved.

The left cross member extension 51 is a member that is substantially symmetrical to the right cross member extension 51.
The left and right cross member extensions 51, 51 are provided with curved portions 82, 82 in which the rear inner side of the main body 81 is bent upward and extended toward the left and right cross members 65, 66, thereby providing left and right front side frames. The collision load transmitted from 16, 16 is easily transmitted to the cross member 24.

As shown in FIGS. 4 and 5, members including the inclined portion 32 of the front side frame 16, the outrigger 25, the floor frame 26, and the tunnel frame (center frame) 27 are arranged below the passenger compartment 12 in the cabin space. The member 91 is defined.
A member including the horizontal portion 31 of the front side frame 16 and disposed in the engine room 13 is defined as an engine room member 92.

  A member that includes the left and right cross members 65 and 66, the cup-shaped joint cover 22, the gussets 61 and 61, and the vertical reinforcing member 62 and that substantially overlaps the cross member 24 in a side view is defined as a cross member member 93.

  In the vehicle body 11, the cabin space member 91 and the engine room member 92 are partitioned (partitioned) by a cross member member 93.

By dividing (partitioning) the cabin space member 91 and the engine room member 92 by the cross member member 93, the engine room member 92 can be shared and the cabin space member 91 can be changed to a different cabin space member. It becomes possible. Thereby, the types of the vehicle body 11 can be increased, and the versatility of the vehicle body 11 can be expanded.

As shown in FIGS. 8 to 11, the outrigger 25 has a hat cross section with an upper opening, and the outrigger 25 is inclined downward toward the rear along the dashboard lower panel 19 (see FIG. 1) in a side view. The front portion 101 includes an outrigger rear portion 102 that curves outward from the rear end 101b of the outrigger front portion 101 in a plan view and extends horizontally in a side view and is connected to the side sill 14.
Furthermore, the width of the outrigger 25 is gradually enlarged in plan view from the front end 101a of the outrigger front portion 101 to the rear end 102b of the outrigger rear portion 102, and the cross-sectional area is increased toward the rear.

  The outrigger front portion 101 includes a collar nut 112 that fastens the rear portion of the front sub-frame 23 with a bolt 111, and a horizontal connecting member for connecting the left and right side walls 104, 105 of the outrigger front portion 101 to the outrigger front portion 101. An outrigger bulkhead) 113, an outrigger opening 106 that is provided on the inclined bottom 103 of the hat cross section of the outrigger front portion 101 and through which the collar nut 112 passes, a bracket 114 that supports a lower portion 112 b of the collar nut 112, and a color nut 112 And a support member 115 for supporting the upper portion 112a of the outer periphery of the outer periphery, and a stiffener (outrigger stiffener) 116 for reinforcing the opening 107 of the front section 101 of the outrigger having a hat cross section.

That is, the rear mount portion 47 (see FIG. 2) on which the rear portion of the front subframe 23 is supported includes the collar nut 112, the horizontal connecting member 113, the outrigger opening 106, the bracket 114, the support member 115, and the stiffener 116. Yes.
Further, the outrigger front portion 101 is inclined toward the rear inner side, and a tunnel frame 27 extending in the front-rear direction along the center tunnel (tunnel portion) 18 is branched.

  The setting position of the collar nut 112 of the outrigger front portion 101 is a position corresponding to a branch portion (branch point) where the outrigger rear portion 102, the tunnel frame 27 and the floor frame 26 are branched from the front side frame 16. That is, it can be said that the setting position of the collar nut 112 is a position where the front collision load is concentrated.

  As shown in FIGS. 9 and 13, the horizontal connecting member 113 is a member welded substantially parallel to the outrigger front portion 101 having an inclined hat cross section. The horizontal connecting member 113 is provided with a connecting main body 117 provided substantially parallel to the outrigger front portion 101 having an inclined hat cross section, and left and right sides of the connecting main body portion 117, and the side walls 104 and 105 of the hat cross section of the outrigger front portion 101. The left and right connecting member side flanges 118 and 119 are welded to each other.

  As shown in FIGS. 9, 10, and 14, the bracket 114 has a front end portion 121 welded to the inclined bottom 103 of the hat cross section of the outrigger front portion 101, and bulges downward from the front end portion 121. A front bulge portion 122, a rear bulge portion 123 that extends the front bulge portion 122 toward the rear, and a rear end portion 133 on the support side of the support member 115 provided behind the rear bulge portion 123. And a rear end portion 124 to be welded.

Left and right flanges 125 and 126 welded to the outer sides of the left and right side walls 104 and 105 of the hat cross section of the outrigger front portion 101 are continuously provided on the left and right of the front bulge portion 122 and the rear bulge portion 123. .
The rear bulge portion 123 is formed with a bracket side horizontal portion 127 that is parallel to the front-rear direction and supports the lower portion (lower end flange) 112b of the collar nut 112 in a side view. A hole 128 that faces the female screw 112c of the collar nut 112 is formed in the bracket side horizontal portion 127, and a lower portion (lower end flange) 112b of the collar nut 112 is welded.

  As shown in FIGS. 9, 15, and 16, the support member 115 includes a support-side front end 131 welded from the inclined bottom 103 of the hat cross section of the outrigger front 101 and the support-side front end 131. An intermediate portion 132 extending from the intermediate portion 132 along the inclined bottom 103 of the hat cross section, a support side rear end portion 133 extending from the intermediate portion 132 along the inclined bottom portion 103 of the hat cross section, and an upper portion of the intermediate portion 132 And a support-side horizontal portion 134 parallel to the front-rear direction that supports the upper portion 112a of the collar nut 112. A through hole 137 that faces the collar nut 112 is formed in the support side horizontal portion 134, and an upper portion (cylinder portion) 112 a of the collar nut 112 is welded to the through hole 137.

  Left and right support-side flanges 135 and 136 welded to the inside of the left and right side walls 104 and 105 of the hat cross section of the outrigger front portion 101 are continuously provided on the left and right sides of the support-side front end portion 131 and the intermediate portion 132. .

  As shown in FIGS. 9 and 12, the stiffener 116 is a member welded to the outrigger front portion 101 having a hat cross section. The stiffener 116 is provided on the left and right sides of the stiffener main body 141 to be welded to the bottom 103 of the outrigger front portion 101 having an inclined hat cross section, and the left and right side walls 104 and 105 of the hat cross section of the outrigger front portion 101. Left and right stiffener side flanges 142 and 143 welded to the inside. The stiffener body 141 is provided with a stiffener opening 144 through which the collar nut 112 passes.

  As shown in FIGS. 1 and 8 to 10, in the front body of the vehicle, the left and right front side frames 16, 16 extending in the longitudinal direction of the vehicle body, and extending in the vehicle width direction, the engine room 13 and a dashboard lower panel 19 that partitions the vehicle compartment 12, left and right side sills 14 that extend from the left and right front side frames 16, 16 to the rear of the vehicle body via the outriggers 25, and the left and right front side frames 16, 16. A front subframe 23 supporting the engine (not shown), a floor panel 17 extending rearward from the dashboard lower panel 19, and a tunnel portion 18 formed in the center of the floor panel 17 and extending in the longitudinal direction of the vehicle body. And comprising.

  The outrigger 25 is inclined to the outrigger 25 in a downward direction along the dashboard lower panel 19 in a side view, and is bent outward from the rear end 101b of the outrigger front portion 101 in a plan view and horizontally in a side view. An outrigger rear portion 102 that is extended and connected to the side sill 14.

  The outrigger front portion 101 is provided with a collar nut 112 for fastening the rear portion of the front sub-frame 23 with a bolt 111, and is inclined rearward and inside the tunnel frame 27 extending in the front-rear direction along the tunnel portion 18. Therefore, when a forward collision (front collision) occurs, the load is branched from the outrigger front portion 101 to the side sill 14 via the outrigger rear portion 102 and from the outrigger front portion 101 to the tunnel frame 27. Therefore, stress can be concentrated on the collar nut 112 disposed in the outrigger front portion 101. Thereby, the color nut 112 can be easily removed from the outrigger front portion 101, the front subframe 23 can be detached from the front side frame 23, and the front side frame 23 can be sufficiently buckled. As a result, it is possible to improve the impact absorbing performance of the front vehicle body of the vehicle.

  As shown in FIGS. 9 and 10, in the front body of the vehicle, the outrigger 25 gradually increases in width in plan view from the front end 101 a of the outrigger front portion 101 to the rear end 102 b of the outrigger rear portion 102. Since the cross-sectional area is increased toward the front, the outrigger 25 behind the collar nut 112 has a larger cross-sectional area than the front. Therefore, the stress can be easily concentrated on the collar nut 112 at the time of the front collision.

  In the front vehicle body of the vehicle, the outrigger 25 has a hat cross section, and the outrigger front portion 101 is provided with a horizontal connecting member 113 for connecting the left and right side walls 104, 105 of the outrigger front portion 101. The lateral opening of the hat cross section at the time can be prevented. As a result, the support rigidity of the front subframe 23 can be increased, and the front side frame 16 can be easily buckled.

  As shown in FIGS. 9 and 10, the front body of the vehicle supports the outrigger opening 106 through which the collar nut 112 passes and the lower portion 112 b of the collar nut 112 at the bottom 103 of the hat cross section of the outrigger front portion 101. Bracket 114 and a support member 115 for supporting the upper portion 112a of the collar nut 112 are provided.

  Further, the bracket 114 is provided with a bracket side horizontal portion 127 parallel to the front-rear direction for supporting the lower portion 112b of the collar nut 112, and the support member 115 is provided with a support side horizontal portion parallel to the front-rear direction for supporting the upper portion 112a of the collar nut 112. 134.

  Since the collar nut 112 is supported orthogonally between the bracket side horizontal portion 127 and the support side horizontal portion 134 parallel to the front-rear direction and is disposed so as to penetrate the outrigger opening 106, the collar nut 112 further supports the front subframe 23. The rigidity can be increased, and the support member 115 can be easily deformed by the collar nut 112 at the time of the front collision, so that the collar nut 112 can be easily broken off.

  As shown in FIGS. 9 and 11, in the front body of the vehicle, the stiffener 116 that reinforces the opening 107 of the hat cross section is provided in the outrigger front portion 101, so that stress is concentrated on the support member 115. The support member 115 can be easily broken.

  As shown in FIG. 1, in the front body of the vehicle according to the present invention, the steering shaft 21 is provided on the left side with respect to the vehicle body width direction. However, the present invention is not limited to this. It may be provided on the right.

  As shown in FIG. 15, in the front body of the vehicle according to the present invention, a through hole 137 that faces the collar nut 112 is formed in the support side horizontal portion 134. However, the present invention is not limited to this. In order to ensure the above, a flange may be formed around the hole.

  The front body of the vehicle according to the present invention is suitable for use in a passenger car such as a sedan or a wagon.

  12 ... Vehicle compartment, 13 ... Engine room, 14 ... Side sill, 16 ... Front side frame, 17 ... Floor panel, 18 ... Tunnel part (center tunnel), 19 ... Dashboard lower panel, 23 ... Front subframe, 25 ... Outrigger, 27 ... Tunnel frame, 101 ... Outrigger front, 102 ... Outrigger rear, 106 ... Outrigger opening, 107 ... Opening, 111 ... Bolt, 112 ... Collar nut, 113 ... Horizontal coupling member, 114 ... Bracket, 115 ... Support member, 116: Stiffener, 127: Bracket side horizontal part, 134: Support side horizontal part.

Claims (5)

Left and right front side frames that extend in the longitudinal direction of the vehicle body, dashboard lower panels that extend in the vehicle width direction and partition the engine room and the vehicle compartment, and extend from the left and right front side frames to the rear of the vehicle body via the outriggers The left and right side sills, the front subframe that is suspended from the left and right front side frames and supports the engine, the floor panel that extends rearward from the dashboard lower panel, and the center of the floor panel In the front vehicle body of the vehicle provided with a tunnel portion extended to
The outrigger is curved outwardly from the rear end of the outrigger front part in a plan view and extended horizontally in a side view while the outrigger front part is inclined downward along the dashboard lower panel in a side view. And an outrigger rear portion connected to the side sill,
A collar nut that fastens a rear portion of the front sub-frame with a bolt is disposed at the front of the outrigger, and the tunnel frame that is inclined rearward and extends in the front-rear direction along the tunnel portion is branched. A front body of a vehicle characterized by   The width of the outrigger is gradually enlarged in plan view from the front end of the front portion of the outrigger to the rear end of the rear portion of the outrigger, and the cross-sectional area is increased toward the rear. The front car body of the vehicle.   3. The vehicle according to claim 1, wherein the outrigger has a hat cross section, and a horizontal connecting member for connecting the left and right side walls of the outrigger front is provided at the front of the outrigger. Front car body. The outrigger front is provided with an outrigger opening through which the collar nut penetrates, a bracket that supports the lower portion of the collar nut, and a support member that supports the upper portion of the collar nut at the bottom of the hat cross section.
The bracket includes a bracket-side horizontal portion parallel to the front-rear direction that supports the lower portion of the collar nut, and the support member includes a support-side horizontal portion parallel to the front-rear direction that supports the upper portion of the collar nut,
The said color nut is orthogonally supported between the said bracket side horizontal part parallel to the front-back direction and a support side horizontal part, and is arrange | positioned so that the said outrigger opening may be penetrated. A front body of the vehicle according to any one of the preceding claims.   The front body of the vehicle according to any one of claims 1 to 4, wherein the outrigger front portion is provided with a stiffener that reinforces the opening of the hat cross section.

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