JP4272173B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front structure in which a dashboard upper that separates an engine room and a vehicle compartment is formed, and left and right damper housings that connect front wheel sides are formed.

There is known a vehicle body front structure in which a dashboard upper that separates an engine room is formed, and a drainage channel is formed in the dashboard upper (see, for example, Patent Document 1).
Japanese Patent No. 3304794 (page 5, FIG. 1)

Patent document 1 is demonstrated based on the following figure.
FIG. 6 is a diagram for explaining a basic configuration of the conventional technique. In the conventional vehicle body front joint structure 101, a drainage channel 103 is formed in the dash upper panel 102, and a recess 105 is formed in the upper part of the dash side panel 104. Since the closed cross-section structure portion 106 is formed by attaching the concave portion 105 to the lower surface of the dash upper panel 102, the closed cross-section structure portion 106 receives a push-up force from the suspension attachment portion 107 and deforms the dash upper panel 102. It can be prevented.

  However, in the vehicle body front joint structure 101 of Patent Document 1, the strength of the dash upper panel 102 is increased with respect to the force transmitted from the suspension mounting portion 107 to the vehicle compartment side, but the suspension mounting portion 107 to which a direct thrust force is applied is compared. For example, in a sports vehicle in which a large force acts, a reinforcing bar (strut tower bar) may be attached between the left and right suspension attachment portions 107. If a reinforcing bar (strut tower bar) is used, the number of parts increases and parts management and installation take time.

  It is an object of the present invention to provide a vehicle body front structure that increases the strength of left and right damper housings without increasing the number of parts.

The invention according to claim 1 is a vehicle body front structure in which a dashboard upper that separates the engine room from the vehicle compartment is formed, and left and right damper housings in which the left and right dampers are accommodated are formed. Connect the other end of the dashboard upper to the right damper housing, parallel to the longitudinal direction of the dashboard upper, form a front drainage channel with a concave cross section at the front, and a concave rear drainage channel at the rear And a concave branch drainage channel branched from the front drainage channel is formed outwardly at one end and the other end, and connected to the rear drainage channel in an orthogonal state .
In the invention according to claim 2, the vehicle body front part structure has a wheel house upper extension formed by forming a damper base at a desired inclination angle with respect to the vertical line on the outside of the damper housing and continuing to the outside of the branch drainage channel. The damper base, one end of the dashboard upper, the other end, and the wheel house upper extension form a substantially triangular cross section outside the damper.
The invention according to claim 3 is characterized in that the dashboard upper side members respectively arranged at one end and the other end of the dashboard upper are arch-shaped members spanning the front drainage channel, the rear drainage channel, and the branch drainage channel. And

In the invention according to claim 1, one end of the dashboard upper is connected to the left damper housing, the other end of the dashboard upper is connected to the right damper housing, and parallel to the longitudinal direction of the dashboard upper , Form a front drainage channel with a concave cross section , mold a concave rear drainage channel at the rear, and form a concave branch drainage channel branched from the front drainage channel to the outside of one end and the other end, orthogonal state Since it is connected to the rear drainage channel, there is an advantage that the strength of the left and right damper housings can be increased without increasing the number of parts by the dashboard upper.

In the vehicle body front structure, one end of the dashboard upper is connected to the left damper housing, the other end of the dashboard upper is connected to the right damper housing, and parallel to the longitudinal direction of the dashboard upper. Form a front drainage channel with a concave cross section , mold a concave rear drainage channel at the rear, and form a concave branch drainage channel branched from the front drainage channel to the outside of one end and the other end, orthogonal state Since it is connected to the rear drainage channel, the strength (section modulus) is increased by the concave section of the drainage channel, and the strength of the dashboard upper can be increased. As a result, the strength of the left and right damper housings can be increased. There is an advantage that you can.
Furthermore, one end of the dashboard upper is connected to the left damper housing, the other end of the dashboard upper is connected to the right damper housing, and a concave front drainage channel is formed at the front in parallel to the longitudinal direction of the dashboard upper. Because it was molded, a concave drainage channel was formed in the rear part, a concave branch drainage channel branched from the front drainage channel was formed on the outside of one end and the other end, and connected to the rear drainage channel in an orthogonal state The strength (section modulus) of the drainage channel (consisting of a front drainage channel, a rear drainage channel, and left and right branch drainage channels) is increased, and the strength of the dashboard upper can be increased.
In addition, in the vehicle body front structure, one end (end portion) of the dashboard upper is attached to the upper portion of the damper housing, and the branch drainage channel included in the drainage channel is formed at one end of the dashboard upper. Due to the concave shape, the strength (section modulus) of the end portion of the dashboard upper located outward (arrow a1) from the damper is increased, and as a result, the strength of the left and right damper housings can be increased.
In the invention according to claim 2, the damper base is formed on the outer side of the damper housing at a desired inclination angle with respect to the vertical line, and is attached to the wheel house upper extension connected to the outer side of the branch drainage channel. Since the damper base and one end of the dashboard upper and the other end and the wheel house upper extension formed a substantially triangular cross section, the damper base increases the strength (section modulus) in the vehicle front-rear and vehicle width direction, and as a result The strength of the left and right damper housings can be increased.
In the invention according to claim 3, the dashboard upper side members respectively arranged at one end and the other end of the dashboard upper are arch-shaped members spanning the front drainage channel, the rear drainage channel, and the branch drainage channel. It is possible to reinforce the branch drainage channel provided outside the one end and the other end in the vehicle width direction and attach a hood hinge.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a front body that employs a vehicle body front structure according to the present invention. “Front”, “rear”, “left”, “right”, “upper”, and “lower” in the lower part of the figure indicate the directions viewed from the driver facing forward.

  The front body 11 is a portion of the vehicle 12 in front of the passenger compartment 13 and includes front side frames 15 and 15 of the vehicle body 14, front wheel houses 16 and 16, damper housings 17 and 17, and wheel house upper extensions 18 and 18. A wheel house upper member 21, 21, a dashboard upper 22, dashboard upper side members 25, 25 (same as the right) respectively disposed at both ends 23, 24 of the dashboard upper 22, and a windshield lower 26 (See also FIG. 4), dashboard upper side extensions 27 (see FIG. 2), 27 (same as FIG. 2), and a vehicle body front structure 28. Reference numerals 29 and 29 denote front pillars, and 31 denotes an engine room.

The windshield lower 26 mainly supports the lower end of a windshield (not shown) and guides water such as rain water downward.
The damper housing 17 mainly has a damper 33 (see FIG. 2) attached to the upper portion 32 (see FIGS. 2 and 3), and a damper base 34 (see FIGS. 2 and 5) outward (in the direction of arrow a1). Have

  The dashboard upper side member 25 is a member for attaching a hood hinge (not shown) and a reinforcing member, and a hood (not shown in the drawing) that protects a device such as an engine in the engine room 31. ) Is supported through a hood hinge so that it can be opened forward.

The dashboard upper 22 is mainly intended to reduce noise such as engine noise together with a dashboard lower (not shown).
Further, the dashboard upper 22 is integrally connected to the dashboard lower, and an end 23 which is one end is attached to the left damper housing 17, and an end 24 which is the other end to the right damper housing 17. The drainage channel 35 is formed, and water W such as rainwater is guided to the both end portions 23 and 24 side through the drainage channel 35 and drained from between the wheel house upper members 21 as indicated by an arrow a2.

  The wheel house upper member 21 has a front portion 37 having a U-shaped cross section, which includes a central portion 41 and upper and lower flange portions 42 (see FIG. 2) and 43 (see FIG. 2), and the upper flange portion 42 has a wheel house upper extension. 18 and the dashboard upper side extension 27 (see FIG. 2) by spot welding, the lower flange portion 43 is attached to the wheel house upper extension 18 by spot welding, and the rear portion 44 is attached to the front pillar 29 by spot welding. Water W is drained from a place where spot welding is not applied.

Next, the vehicle body front structure 28 will be mainly described.
The vehicle body front structure 28 mainly forms a dashboard upper 22 that separates the engine room 31 and the vehicle compartment 13, and forms left and right damper housings 17 and 17 in which the left and right dampers 33 (see FIG. 2) and 33 are accommodated. The both ends 23 and 24 of the dashboard upper 22 are integrally fixed to the left and right damper housings 17 and 17.
Next, a specific description will be given.

2 is a cross-sectional view taken along line 2-2 of FIG. 1 and shows the left side of the front body structure 28 of the vehicle body.
The vehicle body front structure 28 includes a wheel house upper extension 18 and a damper base 34 arranged below the end of the dashboard upper 22, an upper dashboard upper side extension 27 and a dashboard upper side member 25, and outward (arrows). a wheel house upper member 21 disposed in the direction a1), and an end 23 of the dashboard upper 22 is attached to the upper portion 32 of the damper housing 17 with bolts 45... and an end of the dashboard upper 22 23 is formed with a branch drainage channel 46 included in the drainage channel 35.

Further, the vehicle body front structure 28 is formed by forming the damper base 34 at an inclination angle θ with respect to a vertical line, and attaching the damper base 34 to the wheel house upper extension 18 by spot welding, and forming a triangular cross section outside the damper 33 (arrow a1). Formed. The triangular cross section was formed by the damper base 34, the end 23 (including the branch drainage 46) of the dashboard upper 22, and the wheel house upper extension 18.
The right side of the vehicle body front structure 28 has the same configuration as the left side, and a description thereof will be omitted.

FIG. 3 is an exploded view of the front body structure of the present invention.
As described above, in the vehicle body front part structure 28, the end portions 23 and 24 of the dashboard upper 22 are attached to the upper portions 32 and 32 of the left and right damper housings 17 and 17, respectively.
The dashboard upper 22 is specifically fastened by opening an opening 47 for the damper 33 (see FIG. 2) at the left end 23 and passing the damper bolt 45 (see FIG. 2) in the vicinity of the opening 47. Three holes 48 are formed in the right end 24 in the same manner, and an opening 47, holes 48,... In parallel with the longitudinal direction (arrow a4), the front drainage channel 51 is formed in the front part 49, the rear drainage channel 53 is formed in the rear part 52, and the branch drainage water branched from the front drainage channel 51 to the end parts 23 and 24, respectively. The passages 46 and 46 were formed and connected to the rear drainage passage 53 in a substantially orthogonal state, and the wheel house upper member 21 and the dashboard upper side extension 27 were attached.

  In the upper part 32 of the damper housing 17, an opening 55 for the damper 33 (see FIG. 2) was opened, and three fastening holes 56... For passing the bolts of the damper were opened in the vicinity of the opening 55. The opening 55 coincides with the opening 47 and the hole 56 coincides with the hole 48.

FIG. 4 is a perspective view of a dashboard upper side extension used in the vehicle body front structure of the present invention.
The dashboard upper side extension 27 is a substantially triangular plate, and has a welding allowance 57 formed at the upper part and a welding allowance 61 formed at the lower part for welding to the dashboard upper 22.

FIG. 5 is a perspective view of a dashboard upper, a damper base, and a dashboard upper side member used in the vehicle body front structure of the present invention.
More specifically, the dashboard upper 22 is formed with a front drainage channel 51 and a rear drainage channel 53 having a concave section parallel to the longitudinal direction (arrow a4) of the dashboard 22 and perpendicular to the longitudinal direction.
The drainage channel 35 includes a front drainage channel 51, a rear drainage channel 53, and left and right branch drainage channels 46 and 46.

  The damper base 34 is connected to the upper portion 32 (see FIG. 3) of the damper housing 17 and is formed outwardly at an inclination angle θ (see FIG. 2), and is connected to the front side wall 63 of the damper housing 17. A welding allowance 64 is formed at the lower part of the wheel so as to be welded to the wheel house upper extension 18 (see FIG. 2).

  Specifically, the dashboard upper side member 25 is an arch-shaped member that spans the front drainage channel 51, the rear drainage channel 53, and the branch drainage channel 46, and is used for welding to the end 23 of the dashboard upper 22. An inner welding allowance 65 is formed on the outer side, an outer welding allowance 66 is formed on the outer side for welding to the dashboard upper side extension 27 (see FIGS. 2 and 4), and the front end of the end portion 23 of the dashboard upper 22 is formed. A front welding allowance 67 was formed for welding to the rear end portion, a rear welding allowance 68 was formed for welding to the rear end of the end portion 23, and a hole 71 for a hood hinge was formed in the center.

Next, the operation of the vehicle body front part structure of the present invention will be described.
As shown in FIGS. 1 to 3, in the vehicle body front structure 28, both end portions 23, 24 of the dashboard upper 22 are attached to the upper portions 32, 32 of the left and right damper housings 17, 17, and the dashboard upper Since the drainage channel 35 is formed in the upper 22, the strength of the left and right damper housings 17, 17 can be increased without increasing the number of parts by the dashboard upper 22.

  As shown in FIGS. 3 and 5, in the vehicle body front structure 28, a front drainage channel 51 is formed in the front portion 49 in parallel with the longitudinal direction (arrow a <b> 4) of the dashboard upper 22, and the rear drainage channel in the rear portion 52. 53, and the branch drainage channels 46 and 46 branched from the front drainage channel 51 are formed outside the end portions 23 and 24, respectively, and connected to the rear drainage channel 53 in a substantially orthogonal state. The concave section of the front drain path 51, the rear drain path 53, and the right and left branch drain paths 46, 46 increases the strength (section modulus), and the strength of the dashboard upper 22 can be increased.

  As shown in FIG. 2, in the vehicle body front structure 28, the end portion 23 of the dashboard upper 22 is attached to the upper portion 32 of the damper housing 17, and the branch included in the drainage channel 35 is attached to the end portion 23 of the dashboard upper 22. Since the drainage channel 46 is molded, the concave portion of the branch drainage channel 46 increases the strength (section modulus) of the end portion 23 of the dashboard upper 22 located outward (arrow a1) from the damper 33. The strength of the damper housings 17 and 17 can be increased.

  Further, in the vehicle body front structure 28, the damper base 34 is formed at an inclination angle θ and is attached to the wheel house upper extension 18 by spot welding, and the damper base 34 and the dashboard upper 22 are disposed outside the damper 33 (arrow a1). Since the end portion 23 and the wheel house upper extension 18 form a substantially triangular cross section, the damper base 34 increases the strength (section modulus), and as a result, the strength of the left and right damper housings 17 and 17 can be increased. .

  As shown in FIG. 3, in the vehicle body front part structure 28, the front drainage channel 51 is molded in the front part 49 and the rear drainage channel 53 is molded in the rear part 52 in parallel with the longitudinal direction (arrow a <b> 4) of the dashboard upper 22. Therefore, when water W such as rainwater flows into the front drainage channel 51 of the drainage channel 35 as indicated by an arrow a5, the water W can be guided linearly as indicated by arrows a6 and a6, and does not stay and drainage performance. Can be improved.

  Although the vehicle body front structure of the present invention is applied to a four-wheeled vehicle in the embodiment, it can also be applied to a three-wheeled vehicle and can be applied to a general vehicle.

  The vehicle body front part structure of the present invention is suitable for a four-wheeled vehicle.

The perspective view of the front body which employ | adopted the vehicle body front part structure of this invention 2-2 sectional view of FIG. Exploded view of the front body structure of the present invention The perspective view of the dashboard upper side extension used for the vehicle body front part structure of the present invention A perspective view of a dashboard upper, a damper base and a dashboard upper side member used in the vehicle body front structure of the present invention The figure explaining the basic composition of conventional technology

Explanation of symbols

  DESCRIPTION OF SYMBOLS 13 ... Car compartment, 17 ... Damper housing, 22 ... Dashboard upper part, 23 ... One end (end part), 24 ... Other end (end part), 27 ... Vehicle body front part structure, 31 ... Engine room, 33 ... Damper, 35 ... drainage.

Claims (3)

In the vehicle body front structure that forms the dashboard upper that separates the engine room and the vehicle compartment, and that forms the left and right damper housings in which the left and right dampers fit.
Attach one end of the dashboard upper left of the damper housing to connect the other end of the dashboard upper right of the damper housing, parallel to the longitudinal direction of the dashboard upper front section to the front of the concave drainage molded, and the drainage and molded after the concave rear, the one end, by molding the concave branch drainage branched from before drainage respectively outward of the other end, to the rear drainage path at orthogonal states A vehicle body front structure characterized by being connected .   The front structure of the vehicle body is formed by forming a damper base on the outside of the damper housing at a desired inclination angle with respect to a vertical line and attaching the damper base to a wheel house upper extension that extends to the outside of the branch drainage channel. The vehicle body front part structure according to claim 1, wherein a substantially triangular cross section is formed outwardly of the damper base, one end and the other end of the dashboard upper and the wheel house upper extension.   The dashboard upper side members respectively disposed at one end and the other end of the dashboard upper are arch-shaped members spanning the front drainage channel, the rear drainage channel, and the branch drainage channel. The vehicle body front part structure according to claim 1 or 2.

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