CN116605304A - Front structure of vehicle - Google Patents

Abstract

The invention provides a vehicle front structure capable of suppressing load transmission to a bulkhead, an engine and a transmission to prevent failure even when a lower part of a front of a vehicle is in contact with the ground when the vehicle is running. The vehicle front part is configured to be provided at the front part of the vehicle, and has a rectangular frame-shaped partition plate (10) for supporting a heat exchanger (11). A lower rib (10 e) extending downward is provided at the lower end of the partition plate (10).

Description

Front structure of vehicle

Technical Field

The present invention relates to a vehicle front structure for supporting a heat exchanger such as a radiator on a resin separator.

Background

A vehicle front structure is known in which a bulkhead that is disposed in a vehicle front portion and supports a heat exchanger such as a radiator is provided above a side frame. As an example of this structure, in the vehicle front portion structure described in patent document 1, the side frames are fixed to the bulkhead and the lower portion of the engine and the transmission. In this structure, if the vehicle is in contact with the ground at the front lower portion of the vehicle when the vehicle is traveling on the boundary between the slope and the flat road, the bulkhead and the engine and the transmission are not affected by the contact between the side frames and the ground.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2010-162948

Disclosure of Invention

Problems to be solved by the invention

However, there is known a vehicle front structure in which an engine and a transmission are disposed on a front side of a side frame, the side frame is not fixed to a resin bulkhead and a lower portion of the engine and the transmission, and a soft under cover is disposed on a lower portion thereof. In this configuration, there is a soft under cover without a side frame at the lower part of the bulkhead, the engine, and the transmission.

Therefore, when the vehicle is in contact with the ground at the front lower portion of the vehicle when the vehicle is traveling on the boundary between the slope and the flat road, the under cover is soft, and therefore, the load generated by the contact with the ground is directly transmitted to the bulkhead, the engine, and the transmission without being relaxed. This load transmission causes a problem of failure such as breakage of the bulkhead, the engine, or the transmission.

The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicle front structure capable of suppressing load transmission to a bulkhead, an engine, and a transmission to prevent malfunction even when a vehicle front lower portion is in contact with the ground when the vehicle is traveling.

Means for solving the problems

In order to achieve the above object, a vehicle front structure according to the present invention includes a rectangular frame-shaped bulkhead provided in a vehicle front portion and supporting a heat exchanger, the vehicle front structure including a rib extending downward at a lower end of the bulkhead.

Effects of the invention

In the present invention, a vehicle front structure that can suppress load transmission to the bulkhead, the engine, and the transmission to prevent malfunction even when the vehicle front lower portion is in contact with the ground while the vehicle is running can be obtained.

Drawings

Fig. 1 is a perspective view showing a structure of a rear face of a bulkhead disposed in a hood at a front portion of a vehicle.

Fig. 2 is a side view showing a left side view configuration of the left column member in the separator shown in fig. 1.

Fig. 3 is a perspective view showing a structure of a lower side of the left column member shown in fig. 1 in an oblique left side view.

Fig. 4 is a perspective view showing the structure of the support portion of the separator.

Description of the reference numerals

10 partition board

10a1, 10a2 column parts

a1 Vehicle body fixing face

a2 Column side face part

a21 Junction surface

a22 Side surface portion on lower side

a3 Pump support surface

a4 pump fixing face

10b1, 10b2 beam member

10c Water Pump fixing part

10d layer difference part

10e lower rib

10f body fixing part

10g longitudinal rib

10h transverse rib

11. Heat exchanger

13. Front side frame

15. Support part

15a through hole

Width of W1 partition in vehicle front-rear direction

Detailed Description

Structure of the embodiment

An embodiment of the present invention will be described in detail with reference to fig. 1 to 4. In the description, the same elements are denoted by the same reference numerals, and overlapping description is omitted. In each of the drawings, "front and rear" indicated by arrows indicates the front and rear direction of an automobile (not shown), the "left and right" indicates the width direction of the automobile, and the "up and down" indicates the vertical up and down direction.

Fig. 1 shows a vehicle rear view configuration of a bulkhead 10 disposed in a hood at a front portion of a vehicle. Fig. 2 shows a left side view configuration of the left column member 10a1 in the separator 10 shown in fig. 1. Fig. 3 shows a diagonally left side view configuration of the lower side of the left pillar member 10a1 shown in fig. 1.

As shown in fig. 1, the separator 10 is made of resin, is disposed in a front portion of a vehicle, has a rectangular frame shape when viewed from the rear (or from the front), and supports a heat exchanger 11 such as a radiator in the rectangular frame. The rectangular frame of the bulkhead 10 is constituted by beam members 10b1, 10b2 extending horizontally in the vehicle width direction (transverse direction) so as to be separated vertically, and left and right column members 10a1, 10a2 connecting both ends of the upper and lower beam members 10b1, 10b2 in the vertical direction (longitudinal direction).

The bulkhead 10 is fixed to the vehicle body at 2 vehicle body fixing portions 10f separated vertically from each other at the column members 10a1, 10a 2. The upper and lower vehicle body fixing portions 10f are provided on a vehicle body fixing surface portion a1, and the vehicle body fixing surface portion a1 extends a predetermined length from an upper and lower intermediate position of the pillar members 10a1, 10a2 to a lower side position and is directed in the vehicle front-rear direction. The upper and lower vehicle body fixing portions 10f are configured to fix the vehicle body fixing surface portion a1 to the vehicle body by inserting screws or bolts through holes formed in the vehicle body fixing surface portion a 1. The vehicle body fixing surface portion a1 is continuous perpendicularly to the pillar side surface portion a2 in the vehicle width direction (see fig. 2 and 3). The column side surface portion a2 extends between the upper and lower beam members 10b1, 10b 2. The pillar side surface portion a2 and the vehicle body fixing surface portion a1 have an L-shaped cross-sectional shape.

As shown in the left pillar member 10a1, the length of the vehicle-interior side surface portion a22 on the lower side than the vehicle-interior side joint surface a21 of the pillar side surface portion a2 that is joined to the vehicle-body fixing surface portion a1 is shorter than the joint surface a21 in the vehicle longitudinal direction. The pump support surface portion a3 oriented in the vehicle front-rear direction is joined orthogonally to the side surface portion a22 on the lower side. The pump support surface portion a3 is provided in a range from a middle portion to a lower portion in the front-rear direction of the column member 10a 1. The pump fixing surface portion a4 provided with the pump fixing portion 10c (see fig. 2) is engaged with the pump support surface portion a 3. The plate-shaped center portion of the pump fixing surface portion a4 is curved so as to protrude outward in the vehicle width direction (see fig. 3), and the pump fixing surface portion a4 is provided upright on the rear side so as to be orthogonal to the pump support surface portion a3 and joined thereto.

A stepped portion 10d (see fig. 2) is provided between the pump support surface portion a3 and the vehicle body fixing surface portion a 1. The stepped portion 10d is provided below the vehicle body fixing portion 10f (or the vehicle body fixing surface portion a 1) of the pillar members 10a1, 10a2 on the left and right sides of the bulkhead 10. The level difference portion 10d is provided in both the vehicle longitudinal direction (see fig. 2) and the vehicle width direction so as to be a level difference. The stepped portion 10d extends in the front-rear direction and the vehicle width direction.

As shown in fig. 2, the stepped portion 10d is located at the boundary between the pillar side surface portion a2 joined perpendicularly to the vehicle body fixing surface portion a1 on the rear side and the pump fixing surface portion a4 on the lower side thereof. The width W1 in the vehicle longitudinal direction on the side surface of the pillar member 10a1 is the same (equal) on the upper side and the lower side of the stepped portion 10 d. On the side surface of the column member 10a1, a vertical rib 10g (see fig. 3) extending in the vertical direction is provided below the level difference portion 10 d.

A transverse rib 10h is provided on the rear side of the vertical rib 10 g. The cross rib 10h is provided at a position closer to the stepped portion 10d than the vertical rib 10g in the vehicle longitudinal direction. The cross rib 10h is formed by intersecting 2 rib-shaped cross ribs 10h, 10h inclined in opposite directions on the side surface of the column member 10a 1. In other words, the column member 10a1 includes, on a side surface on a lower side than the stepped portion 10d and on a rear side of the vertical rib 10g, a rib-intersecting transverse rib 10h having high rigidity and intersecting obliquely in opposite directions. By providing the vertical rib 10g and the horizontal rib 10h in the column member 10a1 in this manner, the rigidity of the column member 10a1 is improved.

The rib structure can achieve the following effects. For example, when the vehicle is in contact with the ground at the front lower portion of the vehicle when the vehicle is traveling on the boundary between the slope and the flat road, a load when in contact with the ground is applied to the bulkhead 10 toward the obliquely upper rear side. At this time, the load is transmitted more largely to the transverse rib 10h with high rigidity on the rear side via the longitudinal rib 10g on the front side.

As shown in fig. 1, a plurality of lower ribs 10e (3) protruding downward are provided on both side lower surfaces of the lower side member 10b 2.

The lower rib 10e fixed on the lower side of the left column member 10a1 among the left and right lower ribs 10e is representatively shown in fig. 3. The lower rib 10e is fixed to the lower surface of the beam member 10b2, and the beam member 10b2 is positioned below the left column member 10a 1. A lower fixing portion 10i formed of a through hole is provided on the right side in the lateral direction of the lower rib portion 10e of the beam member 10b2, and the lower fixing portion 10i is used for fixing the heat exchanger 11 up and down (fig. 1).

The lower rib 10e is provided below the vertical rib 10g and the horizontal rib 10h of the column member 10a 1. The lower rib 10e is formed in an orthogonal triangle shape having a slope side that slopes downward as going from the front of the vehicle to the rear side. That is, in a state where the vehicle is on a plane, the lower rib 10e is fixed to the lower surface of the beam member 10b2 in a state gradually approaching the ground from the front end side toward the rear end side.

Therefore, for example, when the vehicle is in contact with the ground at the front lower portion of the vehicle when the vehicle is traveling on the boundary between the slope and the flat road, the rear side of the lower rib 10e receives the load when the vehicle is first in contact with the ground. This load is transmitted by the high-rigidity cross rib 10h located immediately above the rear side of the lower rib 10e.

Fig. 4 shows a partial configuration of the left rear side of the separator 10. The bulkhead 10 is fixed to the front ends of a pair of left and right front side frames 13 of the vehicle via a vehicle body fixing portion 10f on the rear side of the pillar member 10a 1. In the column member 10a1, the support portion 15 of the heat exchanger 11 (fig. 1) supported by the lateral suspension portion is fixed at substantially the center in the up-down direction of the column side surface portion a2 (see fig. 1) in the vehicle width direction. The support portion 15 is formed in a plate shape having a predetermined thickness, and a through hole 15a penetrating in the vehicle width direction is provided in a substantially center of the plate shape. The support portion 15 is also provided on the right side (see fig. 1) of the separator 10.

In the separator 10 having this structure, shafts (not shown) protruding outward in the vehicle width direction from both sides of the heat exchanger 11 are inserted into the through holes 15a of the support portions 15 on both the left and right sides, and the heat exchanger 11 is supported in the vehicle width direction (lateral suspension support).

Effect of the embodiments >

Next, the characteristic configuration of the vehicle front structure of the present embodiment and the effects thereof will be described.

(1) The vehicle front structure has a rectangular frame-shaped bulkhead 10 provided in the vehicle front portion and supporting a heat exchanger 11. The lower end of the separator 10 is provided with a rib (lower rib 10 e) extending downward.

According to this configuration, when the vehicle is running on the boundary between the slope and the flat road and the front lower portion of the vehicle is in contact with the ground, the lower rib 10e of the lower portion of the bulkhead 10 is in contact with the ground earlier than the engine or the transmission. Therefore, the damage caused by the contact of the engine and the transmission with the ground can be suppressed. Further, since the load at the time of ground contact can be absorbed by the lower rib 10e, the problem such as breakage of the separator 10 can be suppressed.

(2) The lower ribs 10e are provided on both sides of the bulkhead 10 in the vehicle width direction.

According to this configuration, since the lower ribs 10e are provided at the lower ends of the both sides of the bulkhead 10 in the vehicle width direction, the lower ribs 10e on both sides of the bulkhead 10 can more reliably receive and absorb the load at the time of ground contact. The load is reliably absorbed by the lower ribs 10e on both sides, and thus the lower ribs in the vehicle width direction center of the separator 10 that are originally necessary become unnecessary. Therefore, in the structure for reliably receiving the load when the separator 10 is in contact with the ground, the lower rib 10e on both sides is not required for the lower rib in the center, and therefore, the separator 10 can be reduced in weight.

(3) The lower ribs 10e on both sides of the bulkhead 10 in the vehicle width direction are provided in plural on both sides.

According to this configuration, since the plurality of lower ribs 10e are provided on both sides of the partition plate 10, the load at the time of ground contact can be more reliably received and absorbed.

(4) The lower rib 10e is provided below the column members 10a1 and 10a2 on the side of the partition plate 10.

According to this structure, the column members 10a1 and 10a2 having high rigidity can receive the load received by the lower rib 10e of the separator 10. Therefore, the load can be absorbed more reliably, and bending, breakage, and the like of the separator 10 can be suppressed.

(5) The lower rib 10e is configured to have a shape such that the amount of protrusion of the lower side increases toward the rear of the vehicle.

According to this configuration, for example, when the vehicle is traveling on a boundary between a slope and a flat road, the front side of the lower rib 10e in the vehicle longitudinal direction does not need to protrude downward so much from the viewpoint of protecting the engine and the transmission, and if the front side protrudes excessively downward, the partition plate 10 is easily brought into contact with the ground and easily receives a large load. Therefore, the lower rib 10e is formed in a shape that gradually protrudes downward as it goes rearward, so that the load at the time of contact with the ground during running on the boundary can be efficiently received.

When the lower front portion of the vehicle is in contact with the ground during traveling on the boundary, the front side of the lower rib 10e is less likely to be in contact with the ground, and the rear side is first in contact with the ground to receive a load. Since the column members 10a1 and 10a2 having high rigidity are provided immediately above the rear side of the lower rib 10e receiving the load, the column members are less likely to bend or break due to the load. Therefore, the separator 10 can be prevented from being bent or broken.

(6) The separator 10 includes a support portion 15 for supporting the heat exchanger 11 in the vehicle width direction.

According to this configuration, the heat exchanger 11 can be suspended and supported laterally in the vehicle width direction by the support portion 15 on the resin separator 10, so that even when the lower portion of the separator 10 breaks due to contact with the ground, the heat exchanger 11 can be continuously supported. Further, in the case where the partition plate 10 is supported in the up-down direction without being supported by a lateral suspension, if the lower portion of the heat exchanger 11 is broken, the heat exchanger 11 may fall down. However, if the heat exchanger 11 is supported by the lateral suspension, the lateral suspension of the heat exchanger can be continued even if the lower part is broken.

The vehicle body structure of the present embodiment has been described above, but the present invention is not limited to this, and can be modified as appropriate within the scope of the present invention.

Claims (6)

1. A vehicle front structure having a rectangular frame-shaped bulkhead provided in a vehicle front portion and supporting a heat exchanger, characterized in that,

the lower end of the partition plate is provided with a rib extending downward.

2. The vehicle front structure according to claim 1, characterized in that,

the ribs are provided on both sides of the bulkhead in the vehicle width direction.

3. The vehicle front structure according to claim 2, characterized in that,

the ribs on both sides of the separator in the vehicle width direction are provided in plural on both sides.

4. A vehicle front structure according to any one of claims 1 to 3, characterized in that,

the rib is provided below the column member on the side of the partition plate.

5. The vehicle front structure according to claim 4, characterized in that,

the rib has a shape such that the amount of protrusion of the rib toward the lower side increases toward the rear of the vehicle.

6. The vehicle front structure according to claim 5, characterized in that,

the separator includes a support portion that supports the heat exchanger in the vehicle width direction.