JP5189463B2 - Front body structure of automobile - Google Patents

Description

  In the present invention, a pair of strut towers provided on the left and right sides of the engine room and a center part in the vehicle width direction of the dashboard upper provided at the rear part of the engine room are V-shaped or pedestal toward the front of the vehicle body. The present invention relates to a front body structure of an automobile connected by a connecting member that expands in shape.

The center part in the vehicle width direction of the bar member 1 in which the round pipe is bent into a trapezoidal shape is fixed to the dashboard upper 6 with the soft mount structure 13 and the both ends of the bar member 1 in the vehicle width direction are expanded toward the front of the vehicle body. It is known from Patent Document 1 below that the vehicle body rigidity is improved by fixing the frame to the upper surfaces of the left and right strut towers 3 and 3.
JP 2000-118443 A

  By the way, in the above conventional one, since the bar member 1 formed by bending the round pipe into a trapezoidal shape is composed of a single member, when the front vertical wall rising upward is formed at the front edge of the dashboard upper 6. If the bar member 1 interferes with the front vertical wall and is difficult to assemble, and if an opening or a notch is formed in the front vertical wall in order to avoid interference with the bar member 1, the dashboard upper 6 There is a problem in that the strength of the material is reduced. Further, when the bar member 1 is removed in order to perform maintenance of the equipment in the engine room, there is a problem that the work becomes large because the entire bar member 1 needs to be removed.

  The present invention has been made in view of the above-mentioned circumstances, and is used in front of an automobile capable of effectively increasing the rigidity of the engine room while ensuring the ease of assembly to the vehicle body and the maintainability of the equipment in the engine room. An object is to provide a vehicle body structure.

In order to achieve the above object, according to the present invention, a pair of strut towers provided on the left and right sides of the engine room, and a front vertical wall, a rear vertical wall and a bottom wall provided at the rear part of the engine room are provided. In the front vehicle body structure of an automobile in which a dashboard-shaped dashboard upper having a cross-sectional groove shape is connected to a vehicle width direction central portion with a connecting member that expands in a V shape or a trapezoidal shape toward the front of the vehicle body, the connecting member includes: A pair of left and right straight front members and a single rear member having a right half and a left half connected in a V shape or a trapezoidal shape, and the front ends of the pair of left and right front members are respectively The first bolt is detachably fastened to the upper surfaces of the left and right strut towers, and the rear end is detachably fastened to the front vertical wall of the dashboard upper with a second bolt, and the right half of the rear member and In front of the left half The rear end is welded to the front vertical wall of the dashboard upper, the upper surface of the bracket that constitutes the bottom wall and is welded to the rear vertical wall and closed cross section in cooperation with the dashboard upper of the dashboard upper welded, with the right half portion of the the right of the front member rear member aligned linearly with each other, and linearly aligned with each other in the left-half portion of the rear member and the front member of the left And the second bolt is connected to the front end of the right half and the left half of the rear member welded to the front vertical wall of the dashboard upper together with the rear ends of the pair of left and right front members. front body structure for an automobile, which comprises fastened to part vertical walls Ru been proposed.

According to the present invention , the connecting member that connects the pair of strut towers provided on the left and right sides of the engine room and the center part in the vehicle width direction of the cross-sectional groove type dashboard upper provided on the rear part of the engine room is provided. a pair of left and right straight front member, on the right half portion and left half portion is constituted by a single rear member connected to V-shaped or trapezoidal, the front end of the pair of right and left front members Since the first bolt is detachably fastened to the upper surfaces of the left and right strut towers and the rear end is detachably fastened to the front vertical wall of the dashboard upper with the second bolt, the front member is attached to the dashboard upper It is not only necessary to pass through the front vertical wall, improving the assembly of the front member, but also removing the front member for easy maintenance of the equipment in the engine room, and through holes, etc. Not It is possible to avoid the reduction in the strength of the dashboard upper in the.

Also, since the front end of the right half and the left half of the rear member are welded to the front vertical wall of the dashboard upper and the rear end is welded to the bottom wall and rear vertical wall of the dashboard upper via a bracket , the rear member Can be integrated with the dashboard upper in advance, and the assembly of the rear member is completed simultaneously by assembling the dashboard upper to the vehicle body. And the right half portion of the right front member and the rear member are aligned in a straight line, and the left half portion of the left front member and the rear member is the transmission efficiency of load increase, et al is so aligned in a straight line The strut tower and the dashboard upper can be firmly integrated by the connecting member to increase the rigidity of the vehicle body.

Also, the rear upper ends of the pair of left and right front members are welded to the front vertical wall of the dashboard upper using bolts (that is, the second bolts) that are detachably fastened to the front vertical wall of the dashboard upper. Since the front end of the right half and the left half of the rear member are tightened together, the front member and the rear member can be firmly integrated and the reinforcing effect of the connecting member can be enhanced while minimizing the increase in the number of parts. it can.

Since further constitutes a closed cross section between the bracket is welded to the dashboard upper to the bottom wall and the rear vertical wall, it improves rigidity dashboards and brackets each other and reinforce each other, the rear member to the upper surface of the bracket By welding the rear ends of the right half and the left half, the reinforcing effect of the connecting member is enhanced.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a plan view of a rear portion of an engine room of an automobile, FIG. 2 is a view in two directions in FIG. 1, and FIG. 3 is three directions in FIG. 4 is a view in the direction of the arrow 4 in FIG. 1, and FIG. 5 is a sectional view taken along line 5-5 in FIG.

  As shown in FIG. 1, a dashboard upper 12 constituting an upper rear wall of an engine room 11 of an automobile is arranged in the vehicle width direction, and a front cowl panel 13 extending in the vehicle width direction along the rear edge is welded. The Strut towers 14 and 14 for storing upper portions of the suspension dampers 23 and 23 are provided in front of the dashboard upper 12 and on both left and right sides of the engine room 11, and the front cowl panel 13, the dashboard upper 12 and the left and right The strut towers 14 and 14 are connected by left and right cowl top side lean reinforcements 15 and 15. The bracket 16 welded to the center of the upper surface of the dashboard upper 12 in the vehicle width direction and the upper surfaces 14a and 14a of the left and right strut towers 14 and 14 expand in a V shape or a trapezoidal shape toward the front of the vehicle body. Are connected by a connecting member 17 for reinforcement. In the present specification, the trapezoidal shape refers to a trapezoid having a pair of oblique sides and one upper base and not having a lower base.

  Next, based on FIGS. 1-5, the structure of the said bracket 16 and the said connection member 17 is demonstrated in detail.

  As apparent from FIGS. 4 and 5, the dashboard upper 12 includes a front vertical wall 12 a, a rear vertical wall 12 b, and a bottom wall 12 c that connects between the lower ends thereof, and is configured in a cross-sectional groove shape. The The bracket 16 is a dish-shaped member that opens downward, and includes flanges 16a, 16b, 16c, and 16c over the entire outer periphery thereof. The front flange 16a extending in the vehicle width direction is overlapped with the bottom wall 12c of the dashboard upper 12 and welded W1..., And the rear flange 16b extending in the vehicle width direction is overlapped with the rear vertical wall 12b of the dashboard upper 12. The pair of left and right side flanges 16c, 16c extending in the longitudinal direction of the vehicle body are overlapped so as to straddle the step 12d of the bottom wall 12c of the dashboard upper 12, and are welded W3. The bolt 18 for fixing the rear flange 16b of the bracket 16 to the rear vertical wall 12b of the dashboard upper 12 is for temporarily fixing the bracket 16 to the dashboard upper 12 during welding.

  When the bracket 16 is welded to the dashboard upper 12 in this way, the two members 12 and 16 constitute a box structure with a closed cross section, so that the rigidity can be enhanced (see FIG. 5).

  The connecting member 17 that connects the left and right strut towers 14 and 14 and the dashboard upper 12 includes a rear member 19 on the vehicle body rear side and a pair of left and right front members 20 and 20 on the vehicle body front side.

  As is apparent from FIGS. 3 to 5, the rear member 19 is a member having an open lower surface formed by press-molding a metal plate, and has a right half portion 19R and a left portion that expand in a V shape or a trapezoidal shape toward the front of the vehicle body. The half portion 19L is integrally provided. A rear first flange 19 a and a rear second flange 19 b are formed at the rear portion of the rear member 19, that is, at the portion corresponding to the top of the V shape or the upper base of the trapezoid, and the rear first flange 19 a is the upper surface of the front portion of the bracket 16. The rear second flange 19b is welded to the rear upper surface of the bracket 16 by welding W5.

  Front flanges 19c and 19c are respectively provided at the front ends of the right half portion 19R and the left half portion 19L of the rear member 19 that expands in a V shape or a trapezoidal shape toward the front of the vehicle body. The flanges 19c and 19c are welded W6 to the rear surface of the front vertical wall 12a obtained by bending the front edge of the dashboard upper 12 upward.

  Since the left and right front members 20 of the connecting member 17 have a mirror-symmetrical structure with respect to the vehicle body center plane, one of them will be described.

  As is clear from FIGS. 2 and 5, the front member 20 is formed of a straight pipe having a circular cross section, and a flattened fixed portion 20 a at the front end thereof is overlapped with the upper surface 14 a of the strut tower 14. Fastened with two bolts 21 and 21 and two nuts 22 and 22. 2, the upper end of the suspension damper 23 exposed on the upper surface 14a of the strut tower 14 is fixed with three bolts 24... And three nuts 25.

  An upper bracket 26 and a lower bracket 27 are fixed to the rear end of the front member 20 by welding W7 and W8, respectively, and these upper bracket 26 and lower bracket 27 bend the front edge of the dashboard upper 12 upward. The front vertical wall 12a is fastened to the front surface with three bolts 28 and three nuts 29. At this time, the left and right front flanges 19c and 19c of the rear member 19 welded to the rear surface of the front vertical wall 12a of the dashboard upper 12 are fastened together by the bolts 28 and the nuts 29 ( 3 and 5).

  Thus, when the connecting member 17 including the rear member 19 and the pair of front members 20 and 20 is assembled to the engine room 11, the right half 19R of the rear member 19 and the right front member 20 are in a straight line. The left half 19L of the rear member 19 and the left front member 20 are aligned in a straight line (see FIG. 1).

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  Since the vehicle width direction center portion of the dashboard upper 12 and the upper surfaces 14a, 14a of the left and right suspension towers 14, 14 are connected by a V-shaped or trapezoidal connecting member 17, the vehicle body rigidity around the engine room 11 is increased. Can be increased. Further, the connecting member 17 is divided into a rear member 19 and a pair of left and right front members 20 and 20, and the front ends of the front members 20 and 20 are attached to and detached from the upper surfaces 14a and 14a of the left and right strut towers 14 and 14 with bolts 21. Since the rear end is detachably fastened to the front vertical wall 12a of the dashboard upper 12 with bolts 28 ... so that the front members 20 and 20 penetrate the front vertical wall 12a of the dashboard upper 12 This eliminates the necessity for improving the assembly of the front members 20 and 20 and also facilitates maintenance of the equipment in the engine room 11 by removing the front members 20 and 20, and the dashboard upper There is no possibility of lowering the rigidity of 12.

  Further, the front ends of the right half portion 19R and the left half portion 19L of the rear member 19 are welded to the front vertical wall 12a of the dashboard upper 12, and the rear end is welded to the upper surface of the dashboard upper 12, W1 to W3. Since the brackets 16 are welded to W4..., W5..., The rear member 19 can be integrated with the dashboard upper 12 in advance, and the assembly of the rear member 19 is completed simultaneously by assembling the dashboard upper 12 to the vehicle body. To do. At this time, since the dashboard upper 12 and the bracket 16 welded to the upper surface form a closed cross section, the dashboard upper 12 and the bracket 16 reinforce each other to improve rigidity, and the bracket 16 has an upper surface. By welding the rear ends of the right half 19R and the left half 19L of the rear member 19, the reinforcing effect of the connecting member 17 is enhanced.

  Further, the right front member 20 and the right half 19R of the rear member 19 are aligned in a straight line, and the left front member 20 and the left half 19L of the rear member 19 are aligned in a straight line. The efficiency is increased, and the strut towers 14 and 14 and the dashboard upper 12 can be firmly integrated by the connecting member 17 to increase the vehicle body rigidity.

  Further, using the bolts 28 for detachably fastening the brackets 26, 26; 27, 27 at the rear ends of the left and right front members 20, 20 to the front vertical wall 12a of the dashboard upper 12, the dashboard upper is used. Since the front ends of the right half portion 19R and the left half portion 19L of the rear member 19 welded to the front vertical wall 12a of the twelve portions 12 are fastened together, the front members 20, 20 are minimized while minimizing the increase in the number of parts. Further, the reinforcing effect of the connecting member 17 can be enhanced by firmly integrating the rear member 19.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the connection member of the embodiment, the front members 20 and 20 have a circular cross section and the rear member 19 has a bottom open cross section, but the cross sectional shape is arbitrary.

Top view of the rear of the car engine room 2 direction view of FIG. 3 direction arrow view of FIG. 4 direction view of FIG. Sectional view along line 5-5 in FIG.

11 engine room 12 dashboard upper 12a front vertical wall 12b rear vertical wall 12c bottom wall 14 strut tower 14a upper surface 16 bracket 17 connecting member 19 rear member 19R right half 19L left half 20 front member 21 first bolt 28 Second bolt W1-W6 welding

Claims (1)

A pair of strut towers (14) provided on the left and right sides of the engine room (11), and a front vertical wall (12a), a rear vertical wall (12b) and a bottom wall provided at the rear part of the engine room (11) The front of the automobile connected to the vehicle width direction central portion of the dashboard upper (12) having a cross-sectional groove shape having (12c) with a connecting member (17) that expands in a V shape or a trapezoidal shape toward the front of the vehicle body In the body structure,
The connecting member (17) is composed of a pair of left and right straight front members (20) and one rear member in which the right half (19R) and the left half (19L) are connected in a V shape or a trapezoidal shape. (19)
The front ends of the pair of left and right front members (20) are detachably fastened to the upper surfaces (14a) of the left and right strut towers (14) with first bolts (21), and the rear ends are connected to the dashboard upper ( 12) Fastened to the front vertical wall (12a) of 12) with a second bolt (28),
The rear end is welded (W6) in the front vertical wall (12a) of the right half portion of the rear member (19) (19R) and left half portion and the dashboard upper (12) the front end of the (19L), wherein The upper surface of the bracket (16) welded (W1 to W3) to the bottom wall (12c) and the rear vertical wall (12b) of the dashboard upper (12) and constituting a closed section in cooperation with the dashboard upper (12) (W4, W5)
The front member (20) on the right side and the right half (19R) of the rear member (19) are linearly aligned with each other, and the front member (20) and the rear member (19) on the left side are aligned. The left half (19L) is linearly aligned with each other ,
The second bolt (28) includes a right half portion (19R) and a left half portion (19) of the rear member (19) welded (W6) to the front vertical wall (12a) of the dashboard upper (12). the front end of 19L), characterized by co-fastening to said front vertical wall (12a) with the rear end of the pair of right and left front members (20), the front body structure of an automobile.

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