JP2018024365A - Front structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cooling performance of a radiator while suppressing projection of the radiator upward.SOLUTION: A pair of left and right side members 11L and 11R extend in a longitudinal direction on both sides in a vehicle width direction of a vehicle 1. A first cross member 12 is arranged on a lower side of the left and right side members 11L and 11R at a position separated rearward from front ends 16L and 16R of the left and right side members 11L and 11R, extends in the vehicle width direction, and is fixed to the left and right side members 11L and 11R so as to connect the left and right side members 11L and 11R with each other. A radiator 20 is formed into a flat-plate shape and is arranged in front of the front ends 16L and 16R of the left and right side members 11L and 11R in a state of crossing the longitudinal direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a front structure of a vehicle.

  Patent Document 1 describes a vehicle body front structure. The first cross member of this vehicle is disposed offset downward from the front side member, and the vehicle width direction end of the first cross member is coupled to the front end of the front side member via a connecting member. . Further, a state in which a radiator is mounted and supported on the first cross member is shown.

JP 2001-71933 A

  By the way, depending on the vehicle, a large radiator having a relatively large area may be required. However, in the vehicle body front structure described in Patent Document 1, since the radiator is mounted above the first cross member and the area of the radiator cannot be expanded downward, the radiator is expanded by expanding the area of the radiator upward. There is a possibility of projecting upward. If the radiator is placed in front of the first cross member and the radiator is expanded below the first cross member in order to prevent the radiator from protruding upward, a part of the rear surface of the radiator is blocked by the first cross member. As a result, the cooling performance of the radiator may be reduced by that amount.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle front structure capable of improving the cooling performance of a radiator while suppressing upward projection of the radiator.

  In order to solve the above problems, the vehicle front structure of the present invention includes a pair of left and right side members, a first cross member, and a radiator. The pair of left and right side members extend in the front-rear direction on both sides in the vehicle width direction. The first cross member is disposed below the left and right side members at a position spaced rearward from the left and right front ends of the left and right side members, extends in the vehicle width direction, is fixed to the left and right side members, and the left and right side members are connected to each other. Link. The radiator is a flat radiator and is disposed in front of the left and right front ends of the left and right side members in a state of crossing the front and rear direction.

  In the above configuration, the first cross member is disposed below the left and right side members at a position spaced rearward from the left and right front ends of the left and right side members, and the radiator is disposed in front of the left and right front ends of the left and right side members. The That is, the side members are not disposed on the left and right sides of the radiator, and the first cross member is not disposed below the radiator. For this reason, a radiator can be enlarged and the area of a radiator can be ensured and cooling performance can be improved. In addition, since the first cross member is not disposed below the radiator, the radiator can be disposed at a relatively low position, and the amount of protrusion of the radiator above the left and right side members can be suppressed accordingly.

  Further, since the first cross member is disposed at a position spaced rearward from the left and right front ends of the left and right side members, it is possible to secure a space behind the radiator and prevent deterioration of the cooling performance of the radiator. it can. In addition, when the fan is fixed to the rear surface of the radiator, the fan is disposed between the left and right side members, so that the fan can be moved forward compared to the case where the fan is disposed in front of the front ends of the left and right side members. Protrusion of the radiator can be suppressed.

  The first cross member is disposed below the left and right side members at a position spaced rearward from the left and right front ends of the left and right side members. That is, since the first cross member is not disposed between the left and right side members at the front end portion of the vehicle, it is possible to secure a mounting space for other in-vehicle components between the left and right side members at the front end portion of the vehicle.

  The front structure of the vehicle may include a bracket having a rear end portion supported on the first cross member side and a front end portion supporting the radiator, and supporting the radiator from the first cross member side.

  In the above configuration, since the radiator is supported from the side of the first cross member disposed below the left and right side members, for example, the upper end of the radiator is supported by the front end of the left and right side members, and the lower end of the radiator is The support rigidity of the radiator can be increased by supporting from the first cross member side via the bracket.

  ADVANTAGE OF THE INVENTION According to this invention, the cooling performance of a radiator can be improved, suppressing the protrusion of a radiator upwards.

1 is a side view of a vehicle to which a front structure according to an embodiment of the present invention is applied. It is a schematic side view of the principal part of the vehicle of FIG. It is a schematic top view of the principal part of the vehicle of FIG. It is a perspective view of the front end part of a body frame.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIG. 1, the front structure according to the present embodiment is applied to a vehicle 1 such as a cab-over type truck in which the cab 2 is generally disposed above the engine 3. The cab 2 is disposed above the front portion of the vehicle body frame 4 disposed over the front and rear of the vehicle 1 and is supported by the vehicle body frame 4 from below. A cooling device 5 (see FIG. 2) that cools the cooling water of the engine 3 is disposed at the front end of the vehicle 1 below the cab 2 and supported by the vehicle body frame 4.

  As shown in FIGS. 1 and 2, the vehicle body frame 4 includes a pair of left and right side members 11L, 11R extending in the front-rear direction on both sides in the vehicle width direction of the vehicle 1 (FIG. 2 shows only the left side member 11L. ), And a plurality of cross members extending in the vehicle width direction and connecting the left and right side members 11L and 11R (FIG. 2 shows only the first cross member 12 arranged at the foremost side among the plurality of cross members). And is formed in a ladder shape.

  As shown in FIGS. 2 to 4, the left and right side members 11L and 11R include upper and lower plate portions 13L and 13R and lower plate portions 14L and 14R that face each other vertically, and upper and lower plate portions 13L and 13R and lower plate portion 14L. , 14R and the side plate portions 15L, 15R connecting the outer edges in the vehicle width direction are formed in a substantially U-shaped cross section. The left and right side members 11L and 11R are arranged apart from each other in the vehicle width direction and extend in the front-rear direction. The left and right front ends 16L and 16R (hereinafter simply referred to as front ends 16L and 16R) of the left and right side members 11L and 11R are disposed rearward of the front surface of the cab 2, and the front and rear positions of the front ends 16L and 16R are substantially the same. Position. Between the left and right side members 11L and 11R, the engine 3 is disposed behind the front ends 16L and 16R of the left and right side members 11L and 11R. The left and right side members 11L and 11R are engine mounts (not shown) or the like. The engine 3 is supported via In addition, the shape of the left and right side members 11L and 11R is not limited to a substantially U-shaped cross section, and may be a substantially rectangular cross section.

  The first cross member 12 is disposed below the left and right side members 11L, 11R at a position spaced rearward from the front ends 16L, 16R of the left and right side members 11L, 11R and further forward than the engine 3. Extends in the vehicle width direction. That is, the space 26 is defined between the first cross member 12 and the left and right side members 11L and 11R in front of the first cross member 12 in a top view. The first cross member 12 is formed in a rectangular shape in cross section, and the left and right fixing members in a state where both end portions in the vehicle width direction of the upper surface portion 12a are in surface contact with the lower surfaces of the lower plate portions 14L and 14R of the left and right side members 11L and 11R. 17 is fixed to the left and right side members 11L and 11R. The left and right fixing members 17 are fixed to the lateral side surfaces 18 of the side plate portions 15L and 15R of the left and right side members 11L and 11R and extend downward from the left and right side members 11L and 11R. The plate 17a is bent inward in the vehicle width direction from the lower end of the plate 17a, and is formed in a cross-sectional L shape by a horizontal plate 17b extending along the lower surface of the first cross member 12. The vertical plate portion 17a of the fixing member 17 is fixed to the side members 11L, 11R and the first cross member 12 by welding, and supports the first cross member 12 from the outside in the vehicle width direction. The horizontal plate portion 17b of the fixing member 17 is fixed to the first cross member 12 by welding, and supports the first cross member 12 from below. The distance in the front-rear direction (the length in the front-rear direction of the space 26) between the front ends 16L, 16R of the left and right side members 11L, 11R and the front surface 12b of the first cross member 12 is at least the front-rear direction of the fan 19 described later of the cooling device 5 Longer than the length of. The first cross member 12 is formed such that the length in the vehicle width direction is substantially the same as the length between the side plate portions 15L, 15R of the side members 11L, 11R. The shape of the first cross member 12 is not limited to a substantially rectangular cross section, and may be a substantially U-shaped cross section.

  The cooling device 5 includes a radiator 20 that allows the cooling water of the engine to flow, and a fan 19 that generates a front-to-back air flow to the core (not shown) of the radiator 20.

  The radiator 20 is formed in a flat plate shape by a core and tanks (not shown) on both sides of the core, and is disposed in front of the front ends 16L and 16R of the left and right side members 11L and 11R in a state of crossing the front and rear direction. The core allows air to flow in the front-rear direction. The upper end of the radiator 20 is disposed above the front ends 16L, 16R of the left and right side members 11L, 11R, and the lower end of the radiator 20 is disposed below the lower surface of the first cross member 12.

  The radiator 20 includes a pair of left and right first support brackets 21L and 21R, a pair of left and right second support brackets 22L and 22R, and a pair of left and right third support brackets (brackets) 23L and 23R. It is fixed on the 4th side. The left and right first support brackets 21 </ b> L and 21 </ b> R are fixed to the outer side surface 18 in the vehicle width direction of the front end portions of the side plates 15 </ b> L and 15 </ b> R of the left and right side members 11 </ b> L and 11 </ b> R. It has a front end portion 21b fixed to the vehicle width direction outer side surface 20b of the intermediate portion, and is formed in a plate shape crossing the vehicle width direction and extending in the front-rear direction. That is, the intermediate portion in the vertical direction of the radiator 20 is supported by the left and right side members 11L and 11R via the left and right first support brackets 21L and 21R. The left and right second support brackets 22 </ b> L and 22 </ b> R are disposed below the upper end portion 22 a fixed to the vehicle width direction outer side surface 24 of the vertical plate portion 17 a of the left and right fixing members 17 and the horizontal plate portion 17 b of the fixing member 17. The lower end 22b is extended in the vertical direction and supported by the first cross member 12 via the left and right fixing members 17. The left and right third support brackets 23L, 23R are rear end portions 23a fixed to the vehicle width direction outer side surfaces of the lower end portions 22b of the left and right second support brackets 22L, 22R and the lower end portions of the radiator 20 in the vehicle width direction outside. The front end portion 23b is fixed to the side surface 20b via a spacer 27 and the like, and is formed in a plate shape that intersects with the vehicle width direction, and moves upward and forward from the rear end portion 23a toward the front end portion 23b. Inclined and extended. That is, the lower end portion of the radiator 20 is supported on the first cross member 12 side via the left and right second support brackets 22L and 22R and the left and right third support brackets 23L and 23R. The lower end of the radiator 20 is disposed below the lower surface of the first cross member 12 and above the lower ends of the left and right second support brackets 22L and 22R in a state of being fixed to the vehicle body frame 4 side. A slight gap 25 is provided between the rear surface 20a of the radiator 20 and the front ends 16L, 16R of the left and right side members 11L, 11R. In addition, the structure of the radiator 20 is not limited to the above, What is necessary is just the plate-shaped radiator 20 which crosses with the front-back direction and the air distribute | circulates in the front-back direction.

  The fan 19 is an electric fan that generates a flow of air from the front to the rear, and is disposed on the rear surface 20 a side of the radiator 20 and is fixed to the radiator 20. The length of the fan 19 in the vehicle width direction is slightly shorter than the length between the front end portions of the left and right side members 11L and 11R. The fan 19 is disposed so as to vertically pass through the space 26 between the front end portions of the left and right side members 11L and 11R. The rear surface 19a of the fan 19 is disposed behind the front ends 16L, 16R of the left and right side members 11L, 11R and ahead of the front surface 12b of the first cross member 12. The fan 19 is not limited to an electric fan, and may be a fan 19 that is connected to the crankshaft of the engine 3 and driven by the engine 3.

  In the vehicle 1 configured as described above, the first cross member 12 is disposed below the left and right side members 11L and 11R at a position spaced rearward from the front ends 16L and 16R of the left and right side members 11L and 11R. The radiator 20 is disposed in front of the front ends 16L and 16R of the left and right side members 11L and 11R. Thus, since the side members 11L and 11R are not arranged on the left and right of the radiator 20, and the first cross member 12 is not arranged below the radiator 20, the radiator 20 can be enlarged and the area of the radiator 20 can be secured. Thus, the cooling performance can be improved.

  In addition, the first cross member 12 is not disposed below the radiator 20, and the lower end of the radiator 20 is disposed below the lower surface of the first cross member 12, so that the first cross member 12 is higher than the left and right side members 11L and 11R. The protrusion amount of the radiator 20 can be suppressed.

  Further, since the first cross member 12 is disposed at a position spaced rearward from the front ends 16L, 16R of the left and right side members 11L, 11R, a space 26 can be secured behind the radiator 20, and the rear surface of the radiator 20 can be secured. Compared with the case where the first cross member 12 is disposed near 20a, it is possible to prevent the cooling performance of the radiator 20 from being deteriorated.

  Therefore, according to this embodiment, the cooling performance of the radiator 20 can be improved while suppressing the protrusion of the radiator 20 upward.

  The first cross member 12 is disposed below the left and right side members 11L and 11R at a position spaced rearward from the front ends 16L and 16R of the left and right side members 11L and 11R. That is, since the first cross member 12 is not disposed between the left and right side members 11L and 11R at the front end portion of the vehicle 1, a space for mounting other in-vehicle components is secured between the left and right side members 11L and 11R at the front end portion of the vehicle 1. can do.

  Further, the fan 19 fixed to the rear surface 20a of the radiator 20 is disposed so as to vertically pass through the space 26 between the front end portions of the left and right side members 11L and 11R. For this reason, compared with the case where the fan 19 is arrange | positioned ahead rather than the front ends 16L and 16R of the left and right side members 11L and 11R, protrusion of the radiator 20 ahead can be suppressed.

  Further, the radiator 20 has an intermediate portion in the vertical direction supported by the left and right side members 11L and 11R via the left and right first support brackets 21L and 21R, and the lower end portion of the radiator 20 is supported by the left and right second support brackets. It is supported from the side of the first cross member 12 disposed below the left and right side members 11L, 11R via 22L, 22R and the left and right third support brackets 23L, 23R. Thus, since the lower end part of the radiator 20 is supported from the first cross member 12 side in addition to the intermediate part in the vertical direction, the support rigidity of the radiator 20 can be increased accordingly.

  Further, the left and right second support brackets 22L via the left and right third support brackets 23L and 23R, which extend from the lower end portions 22b of the left and right second support brackets 22L and 22R so that the lower end of the radiator 20 extends forward and upward. , 22R, for example, it is possible to increase the support rigidity of the radiator 20 against a downward load as compared with the case where the left and right third support brackets 23L, 23R extend in the horizontal direction or in the front and lower direction.

  In the present embodiment, the first cross member 12 is fixed to the left and right side members 11L and 11R by the left and right fixing members 17, but the first cross member 12 is fixed to the left and right side members without providing the left and right fixing members 17. The members 11L and 11R may be directly fixed by welding or the like.

  In the present embodiment, the second support brackets 22L and 22R are fixed to the first cross member 12 side, and the lower end portion of the radiator 20 and the second support brackets 22L and 22R are connected by the third support brackets 23L and 23R. Although the lower end portion of the radiator 20 is supported on the first cross member 12 side, for example, the rear end portions 23a of the third support brackets 23L and 23R are connected to the left and right fixing members 17 without providing the second support brackets 22L and 22R. It may be fixed to the first cross member 12 via or directly.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

1: Vehicles 11L, 11R: A pair of left and right side members 12: First cross members 16L, 16R: Left and right front ends of a pair of left and right side members 20: Radiators 23L, 23R: Third support bracket (bracket)
23a: Rear end of third support bracket (rear end of bracket)
23b: Front end of third support bracket (front end of bracket)

Claims (2)

A pair of left and right side members extending in the front-rear direction on both sides in the vehicle width direction;
The left and right side members are disposed below the left and right side members at positions spaced rearward from the left and right front ends, extend in the vehicle width direction, and are fixed to the left and right side members to connect the left and right side members to each other. With the first cross member
And a flat radiator disposed in front of the left and right front ends of the left and right side members in a state of crossing with the front-rear direction. The vehicle front structure according to claim 1,
A front portion of a vehicle comprising a rear end portion supported on the first cross member side and a front end portion supporting the radiator, and a bracket supporting the radiator from the first cross member side. Construction.

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