JPS6036522Y2 - Automobile front structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a front structure of an automobile body, particularly to a structure of a connecting portion between a front edge of a vehicle floor and both side edges of the vehicle floor.

Generally, in automobiles, as shown in Fig. 1, side sills b, b with a closed section structure are fixed to both side edges of the car body floor a to improve rigidity. It is configured to reduce the deformation of the passenger compartment by sharing the collision load F with side sill b.
, b is configured to abut against the front end to alleviate the collision load F and prevent the tires from further retreating to reduce deformation of the passenger compartment (for example, Japanese Utility Model Application No. 52-46414).

However, in such a structure, in the event of a head-on collision, engine d collides with the leading edge of vehicle body floor a as engine d moves backward, pushing and deforming vehicle body floor a rearward as shown by the dashed line in FIG. Due to this deformation, side sill b,
b is deformed as it is pulled inward, resulting in side vine b.

It is no longer possible to expect the collision load to be alleviated by b.

In particular, as shown in Fig. 1, in a structure in which lower arm support members f, f for supporting lower arms e, e of the front suspension are fixed to the front edge of the vehicle floor a,
The lower arm support member f.

Because engine d collides with f, side sill b.

The inward deformation of b becomes even larger, resulting in a problem that the side sills b cannot fully perform their functions.

The main object of the present invention is to provide a front structure of an automobile body that prevents the side sills from collapsing inward, reliably shares the impact load with the side sills, and reduces deformation of the passenger compartment.

The present invention connects the front ends of the side sills to both left and right ends of the front edge of the vehicle body floor, and connects the portions near both sides of the front edge of the vehicle floor inside the vehicle body from the side sills, and the front portions of both side sills. Each rod member is connected to the front part by a rod member whose rear part is inclined outward, and both ends of the rod member are supported so that the rod member can rotate in a substantially horizontal plane with respect to the vehicle body. It is characterized by this.

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

In FIGS. 2 to 5, reference numeral 1 denotes a darts lower member that is fixed to the front edge of the vehicle body floor 2 and forms a closed cross-sectional structure, with a straight section 1a in the center and a rear section facing outward with respect to the front section. It consists of left and right inclined parts 1b, lb which are inclined towards.

3, 3 are side sills whose front ends are joined to the left and right ends of the front edge of the vehicle body floor 2, and these front parts are fixed to the left and right ends (left and right inclined parts 1b, lb) of the darts lower member 1. has been done.

The side sill 3 is composed of a side sill inner 3a and a side sill outer 3b, both of which form a closed cross section with a substantially rectangular cross section.

The straight portion 1a of the needlework lower member 1 is connected to the side sill 3.
, 3 are located further forward than the front end portions, and the inclined portions 1b, l
Lower arm support member 4 forward from the joint part with b.
4 each protrudes forward.

5 is a highly rigid rod member (compression rod)
One end thereof is located at the rear of the bulge 4a of the lower arm support member 4, which is near both sides of the front edge of the vehicle body floor 2 and is located inside the vehicle body from the side sill 3, and the other end is located at the front of the side sill inner 3a. are connected to each other by bolts 6.6 so as to be rotatable in a substantially horizontal plane.

In addition, the rod members 5, 5 are positioned below the inclined portions 1b, lb of the darts lower member 1 in the attached state, that is, the rod members 5, 5 are positioned so that the rear portion thereof is inclined outward with respect to the front portion. are doing.

The rod member 5 includes cylindrical spacers 5c, 5c welded to plate-like mounting portions 5b, 5b, which are connected to both ends of a slightly inclined rod main body 5a, respectively.

The rod body 5a is slightly inclined because of the side sill 3.
This is because the lower surface is located slightly below the lower surface of the lower arm support member 4.

Reference numeral 7 denotes a wheel apron that constitutes both side walls of the engine compartment, and a front side frame 8 having a U-shaped cross section and open on the outside is joined to the lower part of the wheel apron in the longitudinal direction of the vehicle body to form a closed cross section.

Reference numeral 9 denotes a floor side frame extending in the longitudinal direction of the vehicle body below the vehicle body floor 2. The floor side frame 9 is formed in a U-shaped cross section with an open upper part, and is joined to the vehicle body floor 2 to form a closed cross section in the longitudinal direction at the lower part of both sides of the vehicle body floor 2. It consists of

A lower arm support member 4 is connected to the front end of the floor side frame 9.

An inner end of a fork-shaped lower arm 10 of a suspension (not shown) is swingably supported at two points on the lower arm support member 4 .

That is, the front base end 10a of the lower arm 10 is supported at the front end of the lower arm support member 4, and the rear base end 10b of the lower arm 10 is supported by the support member 11 provided on the front and rear lower surfaces of the lower arm support member 4. Supported.

12 is an engine, 13 is a tire house, 14 is a hinge pillar, and 15 is a tire.

Next, if a car with the above structure collides head-on,
Based on FIG. 2, first, the engine 12 moves backward due to the impact force F, and the lower arm support member 4
, 4 to press the needle lower member 1 rearward.

Then, the needlework lower member 1 takes a shape in which a concentrated load is applied to both ends of the straight portion 1a.

Since the rod member 5.5 has high rigidity and its both ends are attached so as to be rotatable within a horizontal plane, the inclined portions 1b, 1b, together with the rod members 5, 5, are bent by the concentrated load. 5 and the connecting part A between the side sills 3, 3,
Rotates around A.

Therefore, the rod member 5 has a structure in which it counteracts the inward pulling force of the side sill 3 due to the retreat of the darts lower member 1, thereby preventing the side sill 3 from becoming inwardly focused, and the side sill 3 being maintained almost in its pre-collision shape. become.

Therefore, the collision load is reliably distributed to the side sills 3.3, minimizing deformation of the passenger compartment, and
When reversing the tire 15, the tire 15 is placed on the front edge of the side sill 3.
collides, prevents the tire 15 from moving backward, and
The load can be buffered by the elastic force.

As described above, the present invention provides a rod member between the front part of the side sill and the part near both sides of the front edge of the vehicle floor and inside the vehicle body from the side sill, and the rear part is connected to the front part of the door rad member. Because the sills are connected so that they are inclined outward, and both ends of the sills can be rotated within a substantially horizontal plane relative to the vehicle body, the front part of the side sills is prevented from bending in a circular direction in the event of a head-on collision, and the engine retreats. Since the load is reliably distributed to both side sills and buffered, the amount of deformation of the passenger compartment is small and the safety and protection of occupants is improved, which is an excellent practical effect.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of the front part of a conventional automobile body, Fig. 2 is a schematic plan view of the embodiment of the present invention, Fig. 3 is a side view of the rod member, and Fig. 4 is a main part of the front part of the car body. FIG. 5 is a perspective view of the same part, and FIG. 5 is a bottom view of the same essential part. 1... Datsushroa member, 1a...
・Straight line part, 1b...Slanted part, 2...Vehicle floor, 3...Side sill, 4...
Lower arm support member, 4a... bulge, 5
..... Tatsudo member, 5a ..... rod body,
5b...Plate mounting part, 5c...Spacer, 6...Bolt, 7...Wheel apron, 8...Front side frame , 9・
...Floor side frame, 10...Middle arm, 10a...Front base end, 10b...
... Rear base end portion, 11 ... Supporting member, 12.
...engine, 13...tire house,
14... Hinge pillar 15... Tire.

Claims (2)

[Scope of utility model registration request] (1) Connect the front ends of the side sills to both left and right ends of the front edge of the vehicle body floor. Connect the front ends of the side sills to the front edges of the front edge of the vehicle body floor, the inner side of the vehicle body from the side sills, and the front portions of both side sills. The rod member is connected to the vehicle body by a rod member whose rear part is inclined outward, and both ends of the rod member are supported so that the rod member can rotate in a substantially horizontal plane with respect to the vehicle body. Characteristic front structure of the car body. (2) The front end of the rod member is connected to the lower arm support member of the suspension disposed near both sides of the front edge of the vehicle body floor. structure.