JP3104139B2 - Car front body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a front side frame having a box-shaped cross-section comprising a front side frame inner and a front side frame outer, and a box-shaped cross-section side sill connected to the rear of the front side frame. The present invention relates to a front body structure of an automobile.

[0002]

2. Description of the Related Art FIGS. 7 to 12 show a front body structure of a conventional automobile. FIG. 7 is a perspective view of a right-hand drive automobile viewed from the front left side of a passenger seat, and FIG. 9 is a horizontal sectional view taken along line 9-9 of FIG. 8, FIG.
FIG. 12 shows lines 10-10 and 11-11 of FIG. 9, respectively.
FIG. 12 is a vertical sectional view taken along line 12-12.

A side sill 01 made of an extruded material having a fixed box-shaped cross section is disposed along a lower edge of an automobile door opening, and a front side frame inner 02 and a front side frame outer 03 are provided at the front end of the side sill 01.
Side frame 04 having a box-shaped cross section
Are joined together. Left and right front side frames 0
4 are connected to each other by a panel-shaped front bulkhead 05 and a reinforcing cross member 06 constituting the front wall of the passenger compartment.
5, a floor panel 07 is stretched between the rear edges.

The front position of the joint between the side sill 01 and the rear end of the front side frame 04, that is, 10--10 in FIG.
At the position in FIG. 10 corresponding to the cross-sectional view taken along the line 10, the front side frame inner 02 formed in an inverted L-shaped cross section and the front side frame outer 0 formed in an L-shaped cross section
3 are welded at diagonal positions to form a front side frame 04 having a rectangular cross section. At the cross-sectional position of FIG. 11 slightly behind in FIG. 10, the front side frame outer 03 approaches the inner surface of the front side frame inner 02, and the cross section of the front side frame 04 has a substantially triangular shape at that portion. As is clear from FIG. 9, the rear end of the front side frame outer 03 is the side sill 0
1 is welded to the front side frame inner 02 at a position just before the front end of the front side frame inner 0.
2 is welded to the inner surface of the side sill 01 at a predetermined angle.

[0005] The joint between the side sill 01 and the front side frame 04 is reinforced as follows. That is, as shown in FIGS. 8, 9 and 11, the front side frame outer rear 08 whose front end is welded to the outer surface of the front side frame outer 03 extends rearward and outward of the vehicle body, and its rear end and side sill 01 Is connected to the front end outer surface via a front pillar lower outer 09, and the front side frame outer rear 08
A connection between the front sill 01 and the front pillar lower outer 09 is further connected to the tip of the side sill 01 via an extension 010.

As is apparent from FIGS. 9 and 12, the front pillar lower 011 is a front pillar lower inner 012 that rises upward from the vicinity of the rear end of the front side frame inner 02, and the front pillar welded to the outer surface thereof. And a lower pillar outer 09.

As is apparent from FIGS. 10 and 11,
The wheel house 013 that houses the front wheel Wf rises from the outer end of the upper surface of the front side frame 04, and a damper house 014 is further welded to the tip.

[0008]

By the way, in the above-mentioned conventional structure, the front side frame 04 is largely deviated to the inside of the vehicle body in plan view with respect to the side sill 01, so that the two are not aligned linearly. Since the cross-sectional shape of the front side frame 04 and the front side frame 04 greatly change at the joint, it is difficult to sufficiently increase the rigidity of the body against an impact from the front of the vehicle body. Further, since the side sill 01 and the front side frame 04 are connected via the front side frame outer rear 08, the front pillar lower outer 09 and the extension 010, the number of parts increases and the structure becomes complicated. . Furthermore, since the wheel house is formed of a separate member from the front side frame and welded to each other, there is a problem that the number of parts and the number of welding steps increase.

The present invention has been made in view of the above-mentioned circumstances, and has as its object to improve the structure of a front part of an automobile body to reduce the number of parts and improve rigidity.

[0010]

In order to achieve the above object, a front body structure of an automobile according to the present invention comprises a front side frame having a box-shaped cross section comprising a front side frame inner and a front side frame outer; In a vehicle front body structure comprising a box-shaped side sill connected to the rear of a frame, the rear end of the front side frame inner is welded to the front end of the side sill, and the rear end of the front side frame outer is extended. The front side frame and the side sill are aligned substantially linearly in the front-rear direction of the vehicle body in plan view and joined to each other by welding to the front end of the side sill, and the cross-sectional shape of the front side frame is smoothly adjusted to the cross-sectional shape of the side sill. To the front Constitute a front wheel of a wheel house the lead frame inner extending integrally to the vehicle body outward and upward, rhinoceros
Front pillar lower outer welded to the outside of the front end of dosil
And the inside of the vehicle body from the front pillar lower outer
Front pillar lower that rises from the top of the side sill
Insert the front pillar lower with the inner
On the outside of the joint between the frame and the side sill.
The front pillar lower outer of the front pillar lower
Flow through the front pillar outer support that becomes the front wall
Side frame outer and extension
The front pillar lower inner is
It is characterized in that it is connected to the extension and reinforced .

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of the present invention. FIG. 1 is a perspective view of a right-hand drive vehicle viewed from the front left side of a passenger seat, and FIG. FIG. 3 is FIG.
3 to 3 are horizontal sectional views, and FIGS.
FIG. 6 is a vertical sectional view taken along line -4, line 5-5, and line 6-6. In FIGS. 1 to 6, members corresponding to the members of the conventional example shown in FIGS. 7 to 12 are denoted by the same reference numerals except the first zero.

As shown in FIGS. 4 and 5, the front side frame 4 is formed by welding the front side frame inner 2 and the front side frame outer 3 together. That is, the front side frame outer 3 is formed in an L-shaped cross section, and the front side frame outer 3 is connected to the cross section L of the front side frame inner 2.
The front side frame 4 having a substantially rectangular cross section is formed by joining to the letter-shaped portions and welding them to each other at diagonal positions. From the edge of the L-shaped cross section portion of the front side frame inner 2, wheel house 2 ₁ so as to rise toward the outside of the vehicle body upward are integrally formed, the damper house 14 on the outer end of the wheel house 2 ₁ Welded. The wheel house 2 ₁ extends in the direction connecting the two ends of L-shaped cross section portion of the front side frame inner 2, thereby the front side frame inner 2 with wheel house 2 ₁ together, moldability during press working Can be easily integrated without impairing the number of components, and the number of parts can be reduced. Moreover, the wheel house 2 ₁ formed in the thickness of the big front side frame inner 2 and the same member for having large strength, it is possible to increase the rigidity of the damper house 14 which is welded to the wheel house 2 _1.

As shown in FIG. 6, the side sill 1 is formed of an extruded material having a constant box-shaped cross section. As is apparent from FIG. 3, the rear end of the front side frame 4 is joined to the front end of the side sill 1. That is, side sill 1
The front end of the front side frame 4 is directly welded to the front end of the front side frame 4, while the rear end of the front side frame outer 3 is located slightly in front of the front end of the side sill 1. The end and the front end of the side sill 1 are interconnected via a relatively small extension 10. In the prior art shown in FIG. 9, the relative positions of the side sill 01 and the front side frame 04 are largely deviated in the left-right direction of the vehicle body, and their cross-sectional shapes are largely changed at the joint portion. The side sill 1 and the front side frame 4 are substantially linearly aligned in the front-rear direction of the vehicle body in a plan view, and their cross-sectional shapes are smoothly changed at the joint portion, and the number of members at the joint portion is greatly reduced. I have. As a result, the impact applied to the front side frame 4 from the front of the vehicle body is sufficiently transmitted to the side sill 1, so that the rigidity of the body is increased, and the number of parts is reduced and the structure is simplified.

[0015] As shown in FIGS. 3 and 6, lower front pillar 11, the front side is composed of the front pillar lower outer 9 and the front pillar lower inner 12
It is provided continuously on the outer surface of the joint between the frame 4 and the side sill 1 . The front pillar lower outer 9 is the front end of the side sill 1.
Parts are welded on the outside, the front pillar outer support 15
And is connected to the front side frame outer 3 and the extension 10 via the reinforcing member. The front pillar lower inner 12 is the front pillar lower outer.
The inner sill is raised from the upper surface of the side sill 1 on the inward side of the vehicle body, and is connected to the extension 10 to be reinforced. As described above, by forming the front pillar outer support 15 that constitutes the front wall of the front pillar lower 11 as a separate member, it is possible to increase the size of the front pillar lower 11 and improve its formability and assemblability. Can be done.

Although the embodiments of the present invention have been described above in detail, the present invention is not limited to the above-described embodiments, and various small design changes can be made.

[0017]

According to the present invention as described above, according to the present invention, with the front side frame and the side sill by interposing only the extension binds to align in a substantially linear shape in plan view, the front side frame at its connecting portion The cross-sectional shape of the side sill and the cross-sectional shape of the side sill are smoothly connected, which not only reduces the number of parts at the joint between the front side frame and the side sill, simplifying the structure,
The impact applied to the front side frame from the front of the vehicle body is sufficiently transmitted to the side sill, and the rigidity of the body is improved. In addition, since the front wheel frame is integrally formed by extending the front side frame inner, the number of parts and the number of welding steps can be reduced. In particular, the flow welded to the outside of the front end of the side sill
Top pillar lower outer and this front pillar lower outer
Stand up from the top of the side sill on the inside of the vehicle
Front pillaro having front pillar lower inner
A, the joint between the front side frame and the side sill
The front pillar lower outer is connected to the outer side,
Front pillar outers that becomes the front wall of the Lonto pillar lower
Front side frame outer and
Connected to the extension and reinforced.
La Roh Inner is connected to the extension and reinforced
Connection between the front side frame and the side sill.
Large cross section of the front pillar lower connected to the outside of the joint
It is designed with its front side frame and side sill
The coupling strength between the front side and the front side
The impact load applied to the frame is more reliably side sill
Is transmitted to the body, improving the overall rigidity of the body
Can greatly contribute to Moreover, the front
When making a large section of the la-lore, the front pillaro
The front pillar outer support that constitutes the front wall of
Lont Pillar Lower Outer Inner
As a result, moldability and assemblability can be improved.
You. In addition, connect between the front side frame and the side sill.
Extension that matches, reinforcement of front pillar lower
Since it is also used as a means, the body structure is simplified accordingly
It is planned.

[Brief description of the drawings]

FIG. 1 is a perspective view of the front left of a right-hand drive car from the passenger seat position.

FIG. 2 is a view in the direction of arrows in FIG. 1;

FIG. 3 is a horizontal sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a vertical sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is a vertical sectional view taken along line 5-5 of FIG. 3;

FIG. 6 is a vertical sectional view taken along line 6-6 of FIG. 3;

FIG. 7 is a diagram showing a conventional example corresponding to FIG.

8 is a view taken in the direction of an arrow 8 in FIG. 7;

9 is a horizontal sectional view taken along line 9-9 in FIG. 8;

FIG. 10 is a vertical sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is a vertical sectional view taken along line 11-11 of FIG. 9;

FIG. 12 is a vertical sectional view taken along line 12-12 of FIG. 9;

[Explanation of symbols]

1 side sill 2 front side frame inner 2 ₁ wheelhouse 3 front side frame outer 4 front side frames 9 front pillar lower outer 10 extension 12 lower front pillar inner 15 front pillar outer support Wf wheel

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 25/00-25/08 B62D 25/14-25/22

Claims (1)

(57) [Claims] 1. A front side frame (4) having a box-shaped cross section comprising an inner front side frame (2) and an outer front side frame (3), and a box-shaped cross section connected to a rear portion of the front side frame (4). The front end of the front side frame inner (2) is welded to the front end of the side sill (1), and the rear end of the front side frame outer (3) is By welding to the front end of the side sill (1) via the extension (10), the front side frame (4) and the side sill (1) are aligned substantially linearly in the front-rear direction of the vehicle body in plan view and are joined to each other.
With that, the wheel of the cross-sectional shape of the front side frame (4) is smoothly connected to the cross-sectional shape of the side sill (1), and the front side frame inner (2) extends outboard upwardly integrally front wheel (Wf) House (2 ₁ )
And a flange welded to the outside of the front end of the side sill (1).
Front pillar lower outer (9) and this front pillar
Side sill (1) on the inside of the vehicle body than the lower outer (9)
Front pillar lower inner (1
2) the front pillar lower (11) having
Joint between the side frame (4) and the side sill (1)
Connected to the outer side and its front pillar lower outer (9)
Is the front wall of the front pillar lower (11)
Front side via pillar outer support (15)
Frame outer (3) and extension (10)
Reinforced and connected to the front pillar lower inner
(12) is connected to extension (10) for reinforcement
Is the fact characterized by a front body structure of a motor vehicle.