KR20050022285A - Car body structure - Google Patents

Abstract

PURPOSE: A structure of a vehicle body is provided to send shock force applied on a front side member through a bracket and a dash cross member to a deck cross member or a front pillar and to prevent deformation of a vehicle room by securing firm combining strength for the front side member of the dash cross member with the bracket. CONSTITUTION: A structure of a vehicle body is composed of left and right front side members(1) extended longitudinally at the lateral sides of the vehicle body; a deck cross member(7) arranged between left and right front pillars(8) of the vehicle body in a width direction of the vehicle; and a dash cross member(3) coupled to the left and right front side members and disposed in the width direction of the vehicle to connect the deck cross member or the left and right front pillars to the front side member, wherein both ends of the dash cross member are extended toward the left and right front pillars or the deck cross member. The dash cross member is combined to the upside of the front side member in the longitudinal direction in front of the front pillar by brackets(2,6).

Description

Body structure {CAR BODY STRUCTURE}

Technical Field

The present invention relates to a vehicle body structure.

Prior art

BACKGROUND ART Conventionally, a technology for improving safety performance during a vehicle crash has been developed by a body structure that gives a side member (front side member) in front of a vehicle shock absorber and has rigidity around a passenger compartment in which a passenger rides. have. That is, by forming the front side member to collapse in an accordion shape against the impact during a vehicle collision, the front side member absorbs the impact force transmitted to the vehicle compartment and sets the rigidity around the vehicle compartment to increase the safety of the vehicle compartment. To improve.

However, in such a vehicle body structure, how to make two opposing elements, a function which absorbs a shock, and a function which endures a shock, becomes a subject.

So, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2000-153779) discloses a front portion 121a extending horizontally in the front-rear direction of the vehicle when viewed from the side, and downward from the rear thereof, as shown in FIG. 8. A front side member 121 having a bent portion 121b bent toward the front side and a rear part 121c bent horizontally at the rear thereof, and having a rear end of the front portion 121a of the front side member 121. The configuration in which the in-panel lean force 123 extending in the vehicle width direction between the front and rear front pillars 122 is connected by the dash cross member 128 and the filler brace 140. In particular, attention is paid to the connection between the dash cross member 128 and the front side member 121 by changing the cross-sectional shape of the front portion 121a and the bent portion 121b of the front side member 121, A step in the vertical direction is provided at the rear end of the front portion 121a, and the dash cross member 128 is connected to the vertical surface of the step.

By the above-described configuration, the front side member of the front side member 121 absorbs the impact force F applied from the front to the front side member 121 at the time of the vehicle collision, and also the front side member. In addition to the bent part 121b of 121, it is also disperse | distributed to the front pillar 122 and the in-panel rinse force 123, and the deformation | transformation behind those members (namely, the deformation | transformation of the periphery of a compartment) can be prevented.

By the way, in the technique of patent document 1, the cross-sectional shape of the front side member 121 is changed in the front part 121a and the bending part 121b (namely, the cross-sectional shape of the front part 121a rather than the bending part 121b). By increasing the size, a vertical surface for connecting the dash cross member 128 to the rear end of the front portion 121a is formed.

However, in such a configuration, when trying to set a large cross-sectional shape of the rear portion 121c of the front side member 121 so as to withstand a greater impact force, for example, a dash is provided to balance the rigidity around the vehicle interior. The vertical surface to which the cross member 128 is connected also needs to be enlarged, and the cross section of the front part 121a of the front side member 121 will become extremely large. Therefore, the front part 121a of the front side member 121 becomes hard to be crushed with respect to the impact force F from the front, and it becomes a structure which is hard to absorb the impact force F. As shown in FIG.

In addition, in order to reduce the vertical surface to which the dash cross member 128 is connected, the angle (theta) 1 which the filler brace 140 and the front part 121a of the front side member 121 make is set large, and the impact force from the front is made. Although it is also considered to reduce the load which the filler brace 140 bears when this dispersion | distribution is carried out, in this case, the effect which distributes the impact force in the front part 121a of the front side member 121 will blur.

On the other hand, if the cross section of the front part 121a is made small in order to make it easy to absorb the impact force F in the front side member 121, the vertical surface to which the dash cross member 128 is connected will become small, and the front side member 121 will be reduced. The cross sectional view of the rear portion 121c becomes smaller. Therefore, the rigidity and intensity | strength of the whole front side member 121 fall, it is easy to produce Z buckling and buckling of the front side member 121, and it becomes difficult to ensure rigidity and strength around a vehicle interior.

As described above, in the technique described in Patent Document 1, there is a problem that setting the cross-sectional shape of the structural member is very difficult in order to improve the shock absorbing performance while preventing deformation around the vehicle compartment.

In addition, in the technique of Patent Document 1, as illustrated in FIG. 8, the impact load F input to the front side member 121 from the front is transmitted to the front pillar 122 through the filler brace 140. Among them, the filler brace 140 is bonded to the dash cross member 128 at the rear end of the front portion 121a of the front side member 121 by a stud bolt or the like.

However, the cross section of the dash cross member 128 is not made into a quadrangle as shown in FIG. 8, but a member having various cross-sectional shapes such as a circle, a hexagon, and an octagon may be used. In such a case, it is difficult to fix the dash cross member 128 to the front side member 121 and the filler brace 140 directly by using a stud bolt or the like.

The present invention has been devised in view of such a problem, and the vehicle body structure which can distribute the load input at the time of a collision with a simple structure to a filler reliably, prevents deformation around a vehicle compartment, and can improve shock absorption performance. The purpose is to provide.

For this reason, the vehicle body structure (claim 1) of the present invention is a deck cross member provided between the left and right front side members extending in the vehicle longitudinal direction on the side of the vehicle body and the front pillars on the left and right sides of the vehicle body, While connected to the left and right front side members and disposed in the vehicle width direction, both ends extend toward the left and right front pillars or the deck cross members, and connect the front side members and the left and right front pillars or the deck cross members. In the vehicle body structure having a dash cross member, the dash cross member is coupled to an upper surface of the front side member in the vehicle longitudinal direction ahead of the front pillar through a bracket.

With such a configuration, it is possible to reliably transmit the impact force acting on the front side member to the deck cross member or the front pillar through the bracket and the dash cross member regardless of the size of the cross section of the dash cross member or the front side member. Moreover, with the simple structure of providing a bracket, while ensuring the engagement rigidity and strength with respect to the front side member of a dash cross member, Z bending and buckling of a front side member can be prevented. Therefore, it is possible to improve the shock absorption performance while preventing deformation around the vehicle compartment.

In addition, in the above-described vehicle body structure, it is preferable that the front side member has a bent portion that is bent downward from the horizontal direction, and the dash cross member is coupled to the upper surface of the front side member through the bracket at the bent portion. (Claim 2).

With such a configuration, since the bracket is disposed at the bent portion of the front side member, the impact force acting on the front side member can be effectively transmitted to the dash cross member and the middle portion rear. Therefore, it is possible to effectively prevent deformation around the vehicle compartment and further improve shock absorption performance.

In addition, having a vertical wall extending in the vehicle width direction and the vertical direction in the upper side of the front side member having a dash panel for partitioning the compartment and the engine room, the brackets are respectively on the upper surface of the vertical wall and the front side member of the dash panel It is preferable to be fixedly installed (claim 3).

With such a structure, the bracket also has a function of reinforcing the dash panel, so that the force acting on the side cross member can be transmitted while securing the strength of the dash panel, and the room space can be secured widely and efficiently.

The bracket may include a first bracket fixed to the upper surface of the front side member immediately before the vertical wall of the dash panel, and a second bracket fixed to the upper surface of the front side member immediately after the vertical wall of the dash panel. It is preferred that the first bracket and the second bracket are fixed by fitting the dash panel (claim 4).

By such a configuration, since the first bracket and the second bracket are fixed to the upper surface of the front side member by fitting the dash panel, the dash panel can be fixed more firmly.

In addition, the first bracket is preferably formed in a rough triangle when the side surface is viewed (claim 5).

By such a structure, the impact input to the member member can be picked up with a simple structure, and the angle formed by the front side member and the dash panel can be effectively reinforced.

In addition, it is preferable that a strut house attaching the upper end of the shock absorber of the vehicle to the side of the front side member is formed, and the bracket is fixed to the wall surface constituting the strut house and the upper surface of the front side member, respectively ( Claim 6).

With such a configuration, since the bracket also has a function of reinforcing the strut house, the strength of the strut house can be secured and efficient.

Moreover, it is preferable that the said dash cross member is integrally provided with a pipe material (claim 7).

By such a structure, rigidity and strength of a dash cross member can be ensured, and a vehicle body structure can be made firm.

Further, the front side member has a pair of member sidewalls formed along the car longitudinal direction and the up and down direction, and the bracket has a pair of bracket sidewalls formed along the car longitudinal direction and the up and down direction, and the bracket Is preferably fixed to an upper surface of the front side member so that the respective positions in the vehicle width direction between the pair of member side walls and the pair of bracket side walls coincide with each other (claim 8).

With such a configuration, by matching the respective positions in the vehicle body width direction of the side wall of the bracket and the side wall of the front side member, the situation is that the bracket is dug into the inside of the front side member at the time of load input, or the front The side member can dig into the inside of the bracket and can avoid it, and the load input to the bracket can be reliably transmitted to the dash cross member or the front pillar.

In addition, the bracket is composed of a first bracket and a second bracket located immediately after the first bracket, the first bracket is connected to both rear ends of the side wall of the pair of brackets in the vehicle width direction and the vertical direction A first upright portion that extends, the second bracket has a second upright portion that extends in a vehicle width direction and a vertical direction by connecting both front ends of the sidewalls of the pair of brackets, and the first upright portion of the first bracket and the It is preferable that the second upright portion of the second bracket is fixed (claim 9).

With such a structure, since the 1st bracket and the 2nd bracket are fixed, when a shock is input into a front side member, the 1st bracket and a 2nd bracket can reliably receive this input shock, respectively. .

And a dash panel for partitioning the vehicle compartment and the engine compartment with vertical walls extending in the vehicle width direction and the vertical direction from above the front side member, wherein the first upright portion of the first bracket and the second bracket of the second bracket are provided. The two uprights are preferably fitted with the dash panel fitted (claim 10).

By such a structure, since the 1st bracket and the 2nd bracket are stuck and fixed by the dash panel, a dash panel can be fixed reliably.

As shown in Fig. 1, two front side members 1 and 1, which extend in the vehicle longitudinal direction, are disposed at the front side of the vehicle to which the vehicle body structure of the present invention is applied, and toward the upper side of the vehicle body. A pair of left and right front pillars 8 and 8 extending from each other are provided from the side chambers 10 and 10 extending in the vehicle longitudinal direction from the left and right outer sides of the vehicle width direction of the front side member 1, respectively. Further, deck cross members 7 are provided between the left and right pairs of front pillars 8 and 8 over the vehicle width direction, and connecting portions 7a and 7a at both ends of the deck cross member 7 are front pillars 8, 8. It is welded to 8).

The dash cross member 3 is installed between these front side members 1 and 1 and the connection parts 7a and 7a of the deck cross member 7. That is, the dash cross member 3 is connected to the front side members 1 and 1, is arranged in the vehicle width direction, and both ends thereof extend toward the connection portions 7a and 7a of the deck cross member 7. Thereby, the dash cross member 3 connects the front side members 1 and 1 and the deck cross member 7, and the front side members 1 and 1 and the front pillar (through the connection parts 7a and 7a). 8, 8) are connected.

In addition, the two front side members 1 and 1 and the pair of left and right front pillars 8 and 8 each have the same structure and have a symmetrical shape. The side member 1 and the front pillar 8 will be described as an example.

As shown in FIG. 1, FIG. 4, this front side member 1 is the front part 1a which extends horizontally in the longitudinal direction of a vehicle, and the 1st side which curves downward from the rear of the front part 1a. The curved portion 1d, the intermediate portion 1b extending obliquely downward from the first curved portion 1d, the second curved portion 1e bent in the horizontal direction again from the rear of the intermediate portion 1b, and the second It is comprised and equipped with the back part 1c extended horizontally back from the bend part 1e.

In addition, the cross-sectional shape of the front side member 1 has the closed cross section as shown in FIG. 7, and the front side member 1 is a pair of side wall (member side wall) formed along a vehicle longitudinal direction and an up-down direction (1h, 1h), flanges (1g, 1g) formed by bending the upper end thereof, a bottom face (1i) covering and covering the lower ends of the pair of side walls (1h, 1h), and provided above the bottom face (1i), It is comprised and equipped with the top plate 1k which covers the upper end part of a pair of side wall 1h, 1h.

The flanges 1g, 1g, the side walls 1h, 1h, and the bottom face 1i are integrally formed by a steel sheet member press-molded in a roughly U-shape, and the top plate (1g, 1g) is formed on the left and right flanges 1g, 1g. 1k) is spot welded, and a closed cross section is formed. In addition, the plate | board thickness of the steel plate member which comprises the flange 1g, the side wall 1h, and the bottom face 1i is set to predetermined thickness by the cross-sectional position.

In addition, in this embodiment, as shown in FIG. 5, when the front of a vehicle collides and the impact load F acts from the front of the front side member 1 (namely, the front of a vehicle), the front member 1 The crushable structure is adopted so that the front portion 1a of the front portion 1 can be squashed in an accordion shape to absorb the impact, and the plate thickness of the middle portion 1b and the rear portion 1c is lower than that of the front portion 1a. It is set large.

As shown in FIG. 1, the dash panel 4 is provided on the front side member 1, and this dash panel 4 is the 1st of the front side member 1 when looking at the side shown in FIG. The front panel (vertical wall) 4a extending from the vicinity of the bent portion 1d in the vehicle width direction and upwards, and the floor surface panel 4b extending obliquely downward from the first bent portion 1d, and the front surface of the vehicle compartment and It forms a lower surface. In addition, the vehicle compartment and the engine compartment are partitioned off by the dash panel 4.

As described above, the dash cross member 3 is provided on the front side member 1 in the width direction of the vehicle body, as shown in FIG. 1. The dash cross member 3 is between the left end of the deck cross member 7 and the front side member 1 on the left side, between the left and right front side members 1 and 1 and on the right side front side member 1. Exposed between the right end of the deck cross member (7).

This dash cross member 3 is horizontally in the vehicle width direction on both front side members 1 and 1 via rear brackets (second brackets) 6 and 6 fixed to the front side members 1 and 1. The present embodiment comprises a hypothesized intermediate portion 3a and left and right ends 3b that are bent upward and backward of the vehicle and welded to the connecting portions 7a and 7a of the deck cross member 7 at both ends thereof. In the form, the intermediate | middle part 3a and the left and right both ends 3b are integrally formed by the hollow steel pipe (pipe member) of circular cross section.

In addition, the front brackets 2 and 2 and the rear brackets 6 and 6 are located in front of the vehicle longitudinal direction than the front pillars 8 and 8, and the dash cross member 3 is the front pillar 8. , 8) is coupled to the upper surfaces of the front side members 1 and 1 from the front in the vehicle longitudinal direction.

With this structure, as shown in Fig. 1, the dash cross member 3 and the deck cross member 7 cooperate to form a frame structure having a trapezoidal (square) frame shape, and the frame structure is placed in the vehicle length direction. It is formed in a planar shape having an inclination of and realizes a rigid vehicle body structure. Therefore, when a load is input from the front side member 1 to the dash cross member 3, the load is reliably transmitted to the deck cross member 7 and the front pillar 8, and the front side member 1 is occupied. Deformation to dig into it (ie, Z break or buckling) is prevented.

In addition, the all brackets 2 and 2 and the rear brackets 6 and 6 fixed to the left and right front side members 1 and 1 are the same shape and structure, respectively, and unless otherwise indicated, the all-side bracket 2 is not shown. The rear bracket 6 will be described as an example.

First, as shown in FIG. 4, the rear bracket 6 is fixed to the front side member 1 immediately after the vertical wall 4a of the dash panel 4, and the vehicle is mounted on the front side member 1. It is fixed via the floor surface panel 4b of the dash panel 4 in the vicinity of the 1st bend part 1d which is a site which is easy to transmit the load input from the front to the dash cross member 3.

3 and 6 (a), the rear bracket 6 is formed along the longitudinal direction of the front side member 1, and is provided in a pair along the vehicle longitudinal direction and the vertical direction. The second side wall portions 6a and 6a and both front ends of the second side wall portions 6a and 6a are connected to each other, and are formed to extend in the vehicle width direction and the upper direction over the width direction of the front side member 1; It is comprised with the bottom part 6c which connects 2 upright parts 6b and the lower end of the 2nd side wall parts 6a, 6a, and forms the bottom face of the rear part bracket 6. As shown in FIG.

And the bottom part 6c which faces the floor surface panel 4b of the dash panel 4 is a bolt 14 in the vicinity of the 1st bend part 1d of the front side member 1 (the front end part of the middle part 1b). ), And the rear bracket 2 is fixed to the front side member 1.

Further, the second side wall portions 6a and 6a of the rear bracket 6 are provided with support portions 6d and 6d for supporting (supporting and supporting) the dash cross member 3. These bearing parts 6d and 6d are formed as a part of the perforated hole which has an inner periphery of the same shape as the outer periphery of the cross-sectional shape of the dash cross member 3. That is, in the state where the outer periphery of the dash cross member 3 contacts the whole part 6d, 6d which is a part of the inner periphery of the perforated hole, the dash cross member 3 supports the rear bracket 6 reliably. It is supposed to be.

In addition, as shown to FIG. 1, FIG. 3, all brackets are immediately before the dash panel 4 in the upper surface of the rear part (namely, bend part 1d) of the front part 1a of the front side member 1. (1st bracket) 2, 2 is provided.

As shown in Fig. 2 and Fig. 6 (b), all of these brackets 2 are formed along the vehicle longitudinal direction and the vertical direction of the front side member 1, and are a pair of first to stand up. It mainly consists of the side wall part (bracket side wall) 2a, 2a and the 1st upright part 2b which extends in the vehicle width direction and an up-down direction, connecting both rear ends of this 1st side wall part 2a, 2a. It is formed so that it may become a shape of a right triangle when the side surface shown in FIG. 4 is seen. In addition, in the present embodiment, all of these brackets 2 have a right triangle shape when viewed from the side surface, but are not limited to such rectangular triangles strictly, but may be, for example, roughly triangle shapes. .

In addition, all the brackets 2 are fixed to the rear bracket 6 via spot welding via the front panel 4a of the dash panel 4. That is, all the brackets 2 and the rear brackets 6 are fixed by fitting the dash panel 4 on the upper surfaces of the front side members 1 and 1.

As a result, the first upright portion 2b of the entire bracket 2 and the second upright portion 6b of the rear bracket 6 are fixed, so that the load transfer from the entire bracket 2 to the rear bracket 6 is secured. It is certain. In addition, the bracket 2 and the rear bracket 6 are both provided with the dash panel 4 fixed to each other, so that the fixing of the dash panel 4 can be secured.

At the lower ends of the first side wall portions 2a and 2a, as shown in Fig. 6B, flanges 2c and 2c bent by press molding are formed outside the vehicle body, and these flanges 2c are formed. , 2c and the flanges 1g, 1g of the front side member 1 are spot-welded, and the bracket 2 is fixed to the front side member 1 altogether.

Therefore, in this embodiment, the said 1st brackets 2 and 2 and the 2nd brackets 6 and 6 function as a bracket which couples a dash cross member to the upper surface of the front side member 1 ,.

Moreover, in this embodiment, as shown in FIG. 2, the strut house 5 which attaches the upper end of the shock absorber (suspension) of a vehicle is provided in the side of the front side member 1, and all brackets 2 are provided. One of the first side wall portions 2a is fixed to the wall surface 5a on the side of the front side member 1 constituting the strut house 5 by spot welding. Thereby, the strut house 5 is reinforced by the bracket 2, and the strength of the strut house 5 can be ensured.

Further, as described above, the entire bracket 2 and the rear bracket 6 are the first bends 1d of the front side member 1, which are portions that are easy to transmit the load input from the front of the vehicle to the dash cross member 3. ), The impact force acting on the front side member 1 can be effectively transmitted to the dash cross member 3 and the intermediate portion 1b rearward. As a result, the deformation around the vehicle compartment can be effectively prevented, and the shock absorbing performance can be further improved.

Moreover, it is preferable to design so that the shared load of the intermediate | middle part 1b of the front side member 1 and the dash cross member 3 at this time may become substantially the same.

As shown in FIG. 7, the plate thickness of the left and right first side wall portions 2a and 2a is determined by the width dimension of the bracket 2 (that is, the width between the left and right first side wall portions 2a and 2a). The added dimension) W ₂ is the width dimension of the front side member 1 (ie, the width dimension between the left and right sidewalls 1h and 1h plus the plate thickness of the left and right sidewalls 1h and 1h) (W _It is designed to coincide with ₁ ). In addition, since the rear bracket 6 is not shown in FIG. 7 because it is all concealed by the bracket 2, the width dimension of this rear bracket 6 is also the width dimension of the bracket 2 (that is, W). _It is designed to be approximately the same as ₂ ).

In addition, when the front surface as shown in FIG. 7 is seen, the center axis AX ₂ of all the brackets 2 and the rear brackets 6 and the center axis AX 1 of the front side member ₁ are combined. As a result, the positions of the first sidewall portions 2a and 2a and the second sidewall portions 6a and 6a with respect to the front side member 1 can be arranged.

In other words, all of the bracket (2) and by the Sikkim matches the center axis (AX ₁₎ of the rear bracket (6) the central axis (AX _2), a front side member (1), all of the bracket (2) Left and right second side wall portions 6a and 6a in the left and right first side wall portions 2a and 2a and the rear bracket 6 and left and right sidewalls 1h and 1h in the front side member 1. You can overlap each of them.

In addition, in this embodiment, the plate | board thickness of the 1st side wall part 2a, 2a and the 2nd side wall part 6a, 6a is set smaller than the plate thickness of side wall 1h, 1h. Accordingly, the first side wall portions 2a and 2a on the right and left sides of the bracket 2 and the second side wall portions 6a and 6a on the left and right sides of the rear bracket 6 are each in the front side member 1 in the vehicle width direction. It is located in each of the plate thickness dimensions W _1h and W _1h of the left and right sidewalls 1h and 1h.

As a result, the left and right first side wall portions 2a and 2a of the bracket 2 and the second side wall portions 6a and 6a of the left and right sides of the rear bracket 6 are formed on the left and right sidewalls of the front side member 1 ( 1h, 1h), and when the load (impact) is applied to the bracket 2 through the front side member 1, the input load (stress) is applied to the front side member 1 It is possible to reliably transmit all of the brackets 2 and the rear brackets 6 from the above.

The position and plate | board thickness of the bracket 2 and the rear bracket 6 as a whole are set as mentioned above for the following reasons. That is, for example, the width dimensions W ₁ between the left and right side walls 1h and 1h in the front side member 1 are all the left and right first side wall portions 2a and 2a in the bracket 2. and setting a width (W ₂₎ (such as i.e., W _1> W ₂₎ to be wider than between, and also, the thickness (W _2a) of a width (W ₂₎ and two first side wall portion (2a) Considering a case in which the difference between the and is set to be larger than the width dimension W ₁ (W ₂ -2 · W _2a > W ₁ ), the first side wall portions 2a and 2a are respectively hollow portions of the front side member 1 ( 1j).

That is, in this case, if an impact is applied to the front side member 1, the impact load is transmitted to the bracket 2 through the front side member 1, but the input is directly above the side walls 1h and 1h. Since the first side wall portions 2a and 2a, which are members to be subjected to the impact, are not located, the load transfer to the bracket 2 is insufficient in the entirety, and the first side wall portions 2a and 2a are the front side member ( There is a risk of digging into the hollow portion 1j of 1).

In addition, the width between the pieces, the width dimension between the side walls of the left and right of the front side member (1), (1h, 1h) (W ₁₎ is, all of the first side wall section (2a, 2a) of the bracket (2) It is set to be narrower than the dimension W ₂ (that is, W ₁ <W ₂ ), and the difference between the width dimension W ₁ and the plate thickness W _1h of the two side walls 1h is the width dimension ( W ₂₎ than in the case has been set (W ₁ -2 · W _1h> Given the W _2), all brackets (2), the first side wall section (2a, 2a) are respectively a front side member (1) of the right and left in the On the flanges 1g, 1g, or more outward than these flanges 1g, 1g, and the left and right sidewalls 1h, 1h of the front side member 1 are all brackets ( It is supposed to be located under the hollow part 2d of 2).

That is, similarly to the above-described example, when the impact is applied to the front side member 1, the first side wall portions 2a and 2a, which are members to receive the impact input immediately above the side walls 1h and 1h, are positioned. As a result, all of the load transfer to the bracket 2 becomes insufficient, and the side walls 1h and 1h of the front side member 1 may all dig into the hollow portion 2d of the bracket 2.

On the other hand, in the present invention according to the present embodiment, the width dimension W ₂ of the bracket 2 and the rear bracket 6 and the width dimension W ₁ of the front side member ₁ are the same, all brackets (2) and the center axis (AX ₂₎ and by the Sikkim matches the center axis (AX ₁₎ of the front side member (1), all brackets (2) and a rear bracket (6) of the rear bracket (6) The load (shock) input to the front side member 1 is reliably received, and the input shock can be transmitted to the dash cross member 3.

Since the vehicle body structure according to the first embodiment of the present invention is configured as described above, the following effects and effects are achieved.

For example, as shown in FIG. 5, when the front of the vehicle collides, and an impact (load) F is input from the front side with respect to the front side member 1, the impact is generated by the front side member 1. In the vicinity of the first bend 1d, it is dispersed to the middle cross 1b of the dash cross member 3 and the front side member 1.

Since the rear bracket 6 and the entire bracket 2 supporting the dash cross member 3 are fixed to the vicinity of the first bent portion 1d located behind the front portion 1a of the front side member 1, Without adversely affecting the crushable performance of the front portion 1a of the side member, the impact force acting on the front side member 1 can be effectively transmitted to the rear of the dash cross member 3 and the middle portion 1b. . Thereby, the deformation | transformation around a compartment can be prevented effectively, and a shock absorption performance can be improved more.

In addition, since the dash cross member 3 is formed integrally with the middle part 3a and the left and right ends 3b of the front side member 1 using the pipe member of a cross section hollow, the dash cross member 3 is carried out. The load input to can be transmitted to the dash cross member 3 reliably, and can be transmitted to the deck cross member 7 and the front pillar 8 further. Therefore, Z bending and buckling of the front side member 1 can be prevented.

In addition, while all the brackets 2 are fixed to the rear upper surface of the front part 1a of the front side member 1, all the brackets 2 are attached to all the upper surfaces of the middle part 1b of the front side member 1. And the rear bracket 6 supporting the dash cross member 3 is fixed, and further, the first side wall portions 2a and 2a of the bracket 2, the second side wall portions 6a of the rear bracket 6, Since the respective positions in the vehicle width direction of the side walls 1h and 1h of 6a) and the side member 1 coincide with each other, when the load (shock) is input to the front side member 1, the impact load is applied. It is possible to reliably pick up the entire bracket 2 and the rear bracket 6, and to transmit the shock received by the entire bracket 2 and the rear bracket 6 to the dash cross member 3 with certainty. It becomes possible. Therefore, the shock inputted to the front side member 1 is not only received by the front side member 1, but the load input at the time of a collision can be reliably distributed to the front pillar 8.

In other words, by matching the respective positions in the vehicle width direction between the side walls 2a and 6a of the rear brackets 2 and 6 and the side walls 1h of the front side member 1, at the time of load input, The bracket is not stuck to the inside of the front side member 1 or, conversely, the front side member 1 is not stuck to the inside of the bracket, and the load input to the bracket is reliably secured to the dash cross member 3. I can deliver it.

Moreover, since the plate | board thickness of the 1st side wall part 2a, 2a and the 2nd side wall part 6a, 6a is set smaller than the plate | board thickness of side wall 1h, 1h, since from the front side member 1 At the time of load transmission, the stress transfer between the member from the side wall 1h to the 1st side wall part 2a and the 2nd side wall part 6a becomes reliable.

Moreover, when the side surface is seen, since the bracket 2 is comprised so that it may become a substantially triangular triangle, the load (shock) input to the front side member 1 can be picked up with a simple structure. In addition, such a simple structure makes it possible not only to efficiently transfer electric charges input to the front side member 1 to the dash cross member 3, but also to reinforce the fixing of the dash panel 4.

In addition, since the rear bracket 6 is fixedly provided immediately after the dash panel 4, the bracket 2 and the rear bracket 6 are all provided with the dash panel 4 fixed, and the dash panel 4 is fixed. Can be fixed securely. In addition, the retreat of the dash panel 4 can be prevented, and the indoor space can be secured widely.

As mentioned above, although one Embodiment of this invention and its modification were demonstrated, this invention is not limited to this embodiment or its modification, It can variously deform and implement in the range which does not deviate from the meaning of this invention.

For example, in the above-mentioned embodiment, although the dash cross member 3 is formed by the hollow steel pipe (pipe member) of circular cross-sectional shape, it is not limited only to such a pipe member, Even if other steel materials etc. are used, good.

In addition, in the above-mentioned embodiment, although the dash panel 4 was comprised all between the bracket 2 and the rear bracket 6, the single unit provided with the function of these brackets 2 and 6 was provided. The configuration may be provided with a bracket, or may be configured such that the dash panel 4 is not fixed to these brackets.

In addition, in the above-mentioned embodiment, although both ends of the dash cross member 3 are connected to the deck cross member 7, both ends of the dash cross member 3 are connected to the front pillar 8, and the impact force is a dash cross. You may comprise so that it may distribute directly to the front pillar 8 from the member 3. For example, when the deck cross member 7 is comprised between the right and left ends 3b of the dash cross member 3 in the vicinity of the connection part of the dash cross member 3 and the front pillar 8, the above-mentioned implementation Similarly to the form, the dash cross member 3 and the deck cross member 7 constitute a frame structure having a trapezoidal (rectangular) frame shape, and a solid vehicle body structure can be realized.

In addition, in the above-mentioned embodiment, all the brackets 2 have a right triangle shape when viewed from the side, but at least, the impact load input to the front side member 1 is transmitted to the rear bracket 6 and the dash cross member 3. As long as it is possible, the shape may be sufficient, or the shape which reinforces the angle formed by the upper surface of the front side member 1 and the dash panel 4 structurally.

In addition, in the above-mentioned embodiment, although the dash cross member 3 is being fixed to the upper surface of the curved part 1d of the front side member 1 via the rear bracket 6, the dash cross member 3 is carried out by the toe board ( 4) may be directly welded to the junction between the bent portion 1d, the lower end of the toe board 4 may be notched, and the dash cross member 3 may be welded directly to the bracket 2. In any case, the dash cross members 3 are all coupled to the upper surface of the front side member 1 via the bracket 2.

According to the configuration of the present application, it is possible to reliably transmit the impact force acting on the front side member to the deck cross member or the front pillar through the bracket and the dash cross member regardless of the size of the cross section of the dash cross member or the front side member. Moreover, with the simple structure of providing a bracket, while ensuring the engagement rigidity and strength with respect to the front side member of a dash cross member, Z bending and buckling of a front side member can be prevented. Therefore, it is possible to improve the shock absorption performance while preventing deformation around the vehicle compartment.

Moreover, with the structure of this application, since the bracket is arrange | positioned at the bending part of a front side member, the impact force acting on a front side member can be transmitted effectively to a dash cross member and an intermediate part rear part. Therefore, it is possible to effectively prevent deformation around the vehicle compartment and further improve shock absorption performance.

In addition, according to the configuration of the present application, since the bracket also has a function of reinforcing the dash panel, the force acting on the side cross member can be transmitted while securing the strength of the dash panel, and the room space can be secured widely and efficiently. to be.

In addition, according to the configuration of the present application, since the first bracket and the second bracket are fixed to the upper surface of the front side member by fitting the dash panel, the dash panel can be fixed more firmly.

Moreover, with the structure of this application, while being able to receive the impact input to the member member with a simple structure, the angle formed by the front side member and the dash panel can be effectively reinforced.

Further, according to the configuration of the present application, since the bracket also has a function of reinforcing the strut house, the strength of the strut house can be secured and efficient.

Moreover, by the structure of this application, the rigidity and intensity | strength of a dash cross member can be ensured, and a vehicle body structure can be made firm.

Moreover, according to the structure of this application, by matching each position in the vehicle body width direction of the side wall of a bracket and the side wall of a front side member, when a load is input, the situation which a bracket penetrates into the inside of a front side member, It is possible to avoid the situation where the front side member is dug into the inside of the bracket, and the load input to the bracket can be transmitted to the dash cross member or the front pillar without fail.

In addition, since the 1st bracket and the 2nd bracket are fixed by the structure of this application, when a shock is input into a front side member, a 1st bracket and a 2nd bracket can receive this input shock reliably, respectively. Can be.

In addition, according to the configuration of the present application, since the first bracket and the second bracket are fixed by fitting the dash panel, the dash panel can be fixed reliably.

The features of the present invention will be described as follows using reference numerals attached to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic perspective view which shows the vehicle body structure which concerns on one Embodiment of this invention.

FIG. 2 is a schematic perspective view showing the main parts of a vehicle body structure according to one embodiment of the present invention (view taken from the arrow A in FIG. 1). FIG.

FIG. 3 is a schematic perspective view of the main part of the vehicle body structure according to the embodiment of the present invention (view taken from the arrow B in FIG. 1). FIG.

4 is a schematic cross-sectional view (C-C cross-sectional view of FIGS. 2 and 3) in which main parts of a vehicle body structure according to one embodiment of the present invention are seen from inside of a vehicle body.

FIG. 5 is a schematic cross-sectional view (C-C cross-sectional views of FIGS. 2 and 3) for explaining a deformation to an impact load in the vehicle body structure according to one embodiment of the present invention.

FIG. 6 shows a bracket constituting a vehicle body structure according to an embodiment of the present invention, and FIG. 6 (a) is a schematic perspective view showing the structure of a second bracket, and FIG. 6 (b) is a A schematic perspective view showing the structure.

7 is a schematic cross-sectional view (D-D cross-sectional view in FIGS. 2 and 3) showing a main part of a vehicle body structure according to one embodiment of the present invention.

8 is a schematic side view showing a conventional vehicle body structure.

Claims (10)

The left and right front side members 1 extending in the vehicle longitudinal direction on the side of the vehicle body, Deck cross member 7 provided in the vehicle width direction between the front pillars 8 of the left and right of a vehicle body, It is connected to the left and right front side member 1 and is disposed in the vehicle width direction, and both ends extend toward the left and right front pillar 8 or the deck cross member 7, and In the vehicle body structure provided with the dash cross member 3 which connects the said front pillar 8 of the right and left or the said deck cross member 7, The dash cross member (3) is coupled to an upper surface of the front side member (1) in the vehicle longitudinal direction ahead of the front pillar (8) via a bracket (2, 6). The method of claim 1, The front side member 1 has a bent portion 1d that bends downward from the horizontal direction, The dash cross member (3) is coupled to the upper surface of the front side member (1) via the brackets (2, 6) in the bend (1d). The method of claim 1, It has a dash panel 4 which partitions a vehicle compartment and an engine room with the vertical wall 4a extending in the vehicle width direction and the up-down direction above the front side member 1, The bracket (2, 6) is a vehicle body structure, characterized in that fixed to the upper surface of the vertical wall (4a) and the front side member (1) of the dash panel (4), respectively. The method of claim 3, wherein The brackets (2, 6) are the first bracket (2) fixed to the upper surface of the front side member (1) in front of the vertical wall (4a) of the dash panel (4), and of the dash panel (4) It consists of the 2nd bracket 6 fixed to the upper surface of the front side member 1 immediately after the said vertical wall 4a, The first bracket (2) and the second bracket (6) is fixed to the dash panel (4) by fitting. The method of claim 4, wherein The first bracket (2) is a vehicle body structure, characterized in that formed in a rough triangle when viewed from the side. The method according to any one of claims 1 to 5, On the side of the front side member (1) is formed a strut house (5) for attaching the upper end of the shock absorber of the vehicle, The brackets (2, 6) are fixed to the wall surface (5a) and the front surface of the front side member (1) constituting the strut house (5), respectively. The method of claim 6, The dash cross member (3) is a vehicle body structure, characterized in that provided integrally by the pipe material. The method of claim 1, While the front side member 1 has a pair of member sidewalls 1h formed along the vehicle longitudinal direction and the vertical direction, The brackets 2 and 6 have a pair of bracket sidewalls 2a and 6a formed along the vehicle longitudinal direction and the up and down direction, The front side member 1 is arranged such that the brackets 2 and 6 coincide with respective positions in the vehicle width direction between the pair of member side walls 1h and the pair of bracket side walls 2a and 6a. Body structure, characterized in that fixed to the upper surface of the. The method of claim 8, The brackets 2 and 6 are composed of a first bracket 2 and a second bracket 6 located immediately after the first bracket 2, The first bracket 2 has a first upright portion 2b extending in the vehicle width direction and the vertical direction by connecting both rear ends of the side walls 2a of the pair of brackets, The second bracket 6 has a second upright portion 6b extending in the vehicle width direction and the vertical direction by connecting both front ends of the side walls 6a of the pair of brackets, The vehicle body structure according to claim 1, wherein the first upright part (2b) of the first bracket (2) and the second upright part (6b) of the second bracket (6) are fixed. The method of claim 9, It has a dash panel 4 which partitions a vehicle compartment and an engine room with the vertical wall 4a extending in the vehicle width direction and the up-down direction above the front side member 1, The vehicle body characterized in that the first upright part 2b of the first bracket 2 and the second upright part 6b of the second bracket 6 are fitted with the dash panel 4 fixed thereto. rescue.