JP4186778B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front structure, and more particularly to a vehicle body front structure that cools a heat source of a vehicle body with cooling air in a vehicle body such as an automobile.

Conventionally, in a vehicle body front structure that cools a heat source of a vehicle body by cooling air in a vehicle body such as an automobile, an air guide plate is provided to cool a brake of a wheel, and a cooling air that cools a radiator and a condenser is discharged from an outlet. A structure is known in which the brakes of the wheels are cooled by diverting the air flow from the front of the vehicle body by the discharged cooling air (see, for example, Patent Document 1). In addition, air is sucked through a filter by a fan, cooling air is forced into the motor through the flexible duct, hollow shaft, its inlet, wheel cylinder and vent, and the motor is forcibly cooled. The structure which exhausts is known (for example, refer patent document 2).
Japanese Patent Laid-Open No. 7-156666 Japanese Utility Model Publication No. 5-22133

  However, in Patent Document 1, the cooling air flowing to the rear of the radiator is discharged from the discharge port, and the air flow from the front of the vehicle body is diverted by the discharged cooling air to cool the wheel brakes. As a result, the cooling air flowing behind the radiator is not guided directly to the wheels of the wheels. For this reason, the cooling performance of the wheel is not good.

  In view of the above facts, an object of the present invention is to provide a vehicle body front structure that can improve the cooling performance of a wheel of a wheel.

The present invention according to claim 1 includes a front side member extending along the longitudinal direction of the vehicle body,
A suspension tower disposed in a middle part in the front-rear direction of the front side member;
A dash panel that joins the left and right front side members to each other in front of the suspension tower;
A radiator disposed on the vehicle body front side of the dash panel;
A vehicle body front structure having
The dash panel has a convex shape in which the center side in the vehicle width direction bulges forward of the vehicle body, and both end portions in the vehicle width direction extend toward the wheels of the wheels.

  Therefore, the cooling air that has passed through the radiator has a convex shape in which the center side in the vehicle width direction bulges forward in the vehicle body, and along the dash panel in which both ends in the vehicle width direction extend toward the wheel of the wheel. Cool the flow wheel directly. As a result, the cooling air that has passed through the radiator can be efficiently blown to the wheels of the wheels. For this reason, the cooling performance of the wheel of a wheel can be improved.

  According to a first aspect of the present invention, there is provided a front vehicle body structure including a front side member extending along the front-rear direction of the vehicle body, a suspension tower disposed in a middle portion of the front side member in the front-rear direction, and a front side of the suspension tower. A front panel structure having a dash panel for connecting the left and right front side members to each other and a radiator disposed on the front side of the vehicle body of the dash panel, wherein the dash panel has a center side in the vehicle width direction at the front side of the vehicle body. Since the convex shape is swollen and both end portions in the vehicle width direction are extended toward the wheel of the wheel, the cooling performance of the wheel of the wheel can be improved.

  An embodiment of a vehicle body front structure according to the present invention will be described with reference to FIGS.

  In the figure, the arrow UP indicates the vehicle body upward direction, and the arrow FR in the figure indicates the vehicle body front direction.

  As shown in FIG. 1, a front side member 12 is disposed in the front portion of the automobile body 10 of the present embodiment at both ends in the vehicle width direction along the longitudinal direction of the vehicle body. Further, a front bumper reinforcement 14 is installed at the front end 12A of the left and right front side members 12, and a collision load input to the front bumper reinforcement 14 when the vehicle body 10 has a front collision (front collision). Is received by the left and right front side members 12.

  As shown in FIG. 3, the front portion 12B of the front side member 12 is linearly disposed along the longitudinal direction of the vehicle body, and has a closed sectional structure in which the cross-sectional shape viewed from the longitudinal direction of the vehicle body is rectangular. . Further, the front portion 12B of the front side member 12 is made of an aluminum extruded material, and the rear portion 12C of the front side member 12 is made of an aluminum casting, which are coupled to each other.

  The rear portion 12C of the front side member 12 includes a base portion 20 that is coupled to the rear of the front portion 12B toward the rear of the vehicle body, and a step pressure receiving portion 22 that is formed below the base portion 20.

  The rear portion of the rear portion 12C of the front side member 12 is a kick portion 12D inclined from the upper front side of the vehicle body toward the lower rear side of the vehicle body, and a floor under reinforcement as a vehicle body skeleton member is provided at the lower end portion 12E of the kick portion 12D. It is coupled to the front end portion 26A of the ment 26.

  A suspension member 30 is coupled to a front end lower part 22A of the step pressure receiving part 22 and a lower end part 12E of the kick part 12D in the rear part 12C of the front side member 12, and a base part 20 of the rear part 12C of the front side member 12 is provided. A wheel (front wheel) 38 having a wheel-in motor 36 and a brake 37 and having no drive shaft is attached to the suspension member 30 via suspension arms 32 and 34.

  Further, the outer side end 40A of the dash cross lower 40 is coupled to the kick portions 12D of the left and right front side members 12, and the dash cross lower 40 is made of aluminum having a closed cross section extending in the vehicle width direction. It is made of extruded material.

  As shown in FIG. 1, suspension towers 42 are respectively disposed in the front-rear direction intermediate portions of the left and right front side members 12, and apron upper members 44 are disposed on the upper outer sides in the vehicle width direction of the left and right suspension towers 42. Is disposed substantially along the longitudinal direction of the vehicle body.

  Between the front end portions 44A of the left and right apron upper members 44, a dash panel 48 is disposed along the vehicle width direction. The dash panel 48 has a convex shape in which the center side in the vehicle width direction bulges forward of the vehicle body, and the front wall portion 48A of the dash panel 48 has an arc shape that bulges forward of the vehicle body in plan view. Further, both end portions 48B in the vehicle width direction of the front wall portion 48A of the dash panel 48 are extended toward the wheel-in motor 36 and the brake 37 disposed in the wheel 38, and the vehicle width of the dash panel 48 is increased. Both end portions 48C in the direction are coupled to the inner side in the vehicle width direction of the front end portion 44A of the left and right apron upper members 44.

  Further, both end portions 48C in the vehicle width direction of the dash panel 48 are coupled to the front wall portions 42A of the left and right suspension towers 42, and portions 48D in the vicinity of the both end portions 48C in the vehicle width direction of the dash panel 48 are viewed from the front of the vehicle body. It is coupled to the front side member 12 from vertically above.

  A radiator 50 is disposed along the vehicle width direction on the vehicle body front side of the front wall portion 48A of the dash panel 48. The radiator 50 is coupled to the left and right front side members 12 via a radiator support 52. Therefore, the cooling air (arrow W) that has passed through the radiator 50 flows along the front wall 48A of the dash panel 48 in the direction of the wheel-in motor 36 and the brake 37 disposed in the wheel of the wheel 38. It has become.

  As shown in FIG. 2, a cowl 48E is formed at the upper end of the dash panel 48 toward the front of the vehicle body.

  As shown in FIG. 3, a tunnel reinforcement 60 is disposed at the vehicle width direction central portion on the vehicle body rear side at the lower portion of the dash cross lower 40, and the left and right fronts are disposed on the rear side of the lower portion of the dash cross lower 40. The floor under reinforcement 26 and the rocker 62 are connected via the rear end portion 12G of the side member 12.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, the front wall portion 48A of the dash panel 48 has an arc shape that swells forward of the vehicle body in plan view, and both end portions 48B of the front wall portion 48A in the vehicle width direction are the wheels 38. 1 to 3, the cooling air W that has passed through the radiator 50 is placed in front of the dash panel 48. As shown in FIGS. It flows along the wall 48A and directly cools the wheel-in motor 36 and the brake 37.

  As a result, in this embodiment, the cooling air W that has passed through the radiator 50 can be efficiently blown to the wheel-in motor 36 and the brake 37 that are disposed in the wheel 38. For this reason, the cooling performance of the wheel-in motor 36 and the brake 37 can be improved. Further, since the dash panel 48 is used, an increase in the number of parts can be eliminated and an increase in cost can be suppressed.

  In the present embodiment, since the cowl 48E is formed at the upper end of the dash panel 48 toward the front of the vehicle body, the cooling air W that has passed through the radiator 50 flows upward of the vehicle body of the dash panel 48 by the cowl 48E. Can be prevented. As a result, the cooling air W that has passed through the radiator 50 can be blown more efficiently toward the wheel-in motor 36 and the brake 37 at the vehicle body lower side of the dash panel 48.

  In the above, the present invention has been described in detail with respect to specific embodiments. However, the present invention is not limited to the above embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, the front wall portion 48A of the dash panel 48 has an arc shape that swells forward in the plan view, but instead, as shown in FIG. It is good also as other shapes, such as V shape swelled ahead of the vehicle body in planar view.

It is a top view which shows the vehicle body front part to which the vehicle body front part structure which concerns on one Embodiment of this invention is applied. It is a side view which shows the vehicle body front part to which the vehicle body front part structure which concerns on one Embodiment of this invention is applied. It is the perspective view seen from the vehicle body diagonally rear which shows the vehicle body front part to which the vehicle body front part structure which concerns on one Embodiment of this invention is applied. It is a top view which shows the vehicle body front part to which the vehicle body front part structure which concerns on other embodiment of this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Auto body 12 Front side member 36 Wheel-in motor 37 Brake 38 Wheel 42 Suspension tower 44 Apron upper member 48 Dash panel 48A Dash panel front wall part 48B Dash panel front wall part both ends in the vehicle width direction 50 Radiator

Claims (1)

A front side member extending along the longitudinal direction of the vehicle body,
A suspension tower disposed in a middle part in the front-rear direction of the front side member;
A dash panel that joins the left and right front side members to each other in front of the suspension tower;
A radiator disposed on the vehicle body front side of the dash panel;
A vehicle body front structure having
The dash panel has a convex shape in which the center side in the vehicle width direction bulges forward of the vehicle body, and both end portions in the vehicle width direction extend toward the wheels of the vehicle body.

Images