JPH0243828Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a frame structure constituting an engine frame of an automobile.

(Prior Art) As a prior art in the technical field to which the present invention pertains, there is, for example, a frame structure described in Japanese Utility Model Application Publication No. 106973/1983. In the frame structure of this known example, as shown in Fig. 4, the shape of the cross member a for the engine mount is narrow at the center and wide at both ends, and two bolts c, c are attached to the lower surface of the side frame b. are connected through. When a car with such a frame structure collides, the side frame b collapses from its tip due to the inertial mass distribution of the car, especially the inertial force of the engine mass, but in the case of the above-mentioned known example, the strong cross member a Since the part is connected to the lower surface of side frame b, the amount of crushing of side frame b is l.
Only the part (connection part with cross member a) is obtained.
l' becomes strong and does not collapse), and downward deformation at the curved part d at the rear of side frame b (as shown by the chain line)
becomes larger, and the rotation phenomenon of the car (diving)
There is a risk that this may occur, and there is still room for improvement in terms of collision characteristics with respect to window retention.

(Problems to be Solved by the Invention) The present invention was made in an attempt to improve the problems pointed out in the prior art section above. The purpose is to provide structure.

(Means for Solving the Problems) As a means for achieving the above object, the present invention provides coupling fasteners at both ends of a cross member that is coupled between a pair of side frames disposed in the longitudinal direction of the vehicle. The cross member is characterized by integrally forming a bifurcated branch portion to which a tool is fastened, and a mount for supporting the engine is provided on the rear side of the cross member near the joint with the side frame.

(Function) In this invention, by connecting the bifurcated branch parts formed at both ends of the cross member to the lower surface of the side frame via fasteners, it is possible to connect not only the front part of the side frame but also the front part of the side frame in the event of a car collision. In addition, by locating the engine mount on the rear side of the cross member near the joint with the side frame, the inertial force of the engine mass is reduced to the side frame. Another effect is that the input position can be set as far back as possible.

(Embodiments) Hereinafter, some preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the engine room of a car, engine 1
Both ends of the cross member 2 supporting the
A frame structure is constructed by connecting the lower surface of the frame via fasteners 4, 4, . . . In this embodiment, the fasteners 4 include bolts 4a and nuts 4b.
has been adopted. Reference numeral 5 denotes a damper interposed in the fastening portion of the fastener 4.

The bolt 4 is attached to the end of the cross member 2.
Bifurcated branch portions 7, 7 having bolt holes 6, 6, respectively, for inserting the bolts a, 4a are integrally formed.

Thus, the branch portions 7, 7 are connected to the side frame 3.
It abuts on the lower surface and is fastened and fixed with bolts 4a, 4a and nuts 4b, 4b. Therefore, at the joint between the cross member 2 and the side frame 3, a non-reinforced part is formed between the branch parts 7, 7, and the bolts 4a, 4a are damaged by the inertia force caused by the engine mass generated during a car collision. The middle part will also be destroyed. In other words, in the side frame 3, the portion in front of the bolt 4a on the rear side is crushed in the event of a collision, and the collision energy absorption performance is significantly improved.

Further, the cross member 2 is provided with mounts 8, 8 for supporting the engine 1, but the positions of the mounts 8, 8 are near the origins of the rear branch portions 7, 7 (i.e., near the cross member 2). (on the rear side of the member 2, near the joint with the side frame 3). By doing this, the input position of the inertial force of the engine mass to the side frame 3 at the time of a collision can be set as far back as possible, and the collision between the branch parts 7, 7 in the side frame 3 becomes easy. , the collision energy absorption performance can be further improved.

FIG. 3 shows another embodiment of the present invention. In this case, in the side frame 3, the bolts 4a, 4a are bent in the vehicle width direction to form a curved portion 9, and the curved portion We are trying to increase the absorption of collision energy by taking advantage of the ease of deformation of 9.

In addition, in each of the above embodiments, if the cross member 2 is configured such that the interval between the branch parts 7, 7 is large, the span of the fasteners 4, 4 can be increased, which is advantageous in terms of support stability and strength. Become.

(Effects of the invention) As described above, according to the invention, the bifurcated branch portions formed at both ends of the cross member are connected to the side frame via fasteners, and the engine mount position is set at the rear side of the cross member. It is installed near the joint with the side frame, so that the joint between the side frame and cross member is more likely to collapse in the front-rear direction in the event of a car collision. This results in a significant increase in the amount of collision energy absorbed by the vehicle, which has the practical effect of suppressing the rotation phenomenon of the vehicle.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the frame structure of an automobile according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a perspective view showing the frame structure of an automobile according to another embodiment of the invention. FIG. 4 is a perspective view of essential parts showing the frame structure of a conventional automobile. 1...Engine, 2...Cross member, 3...
Side frame, 4... Fastener, 4a... Bolt, 4b... Nut, 7... Branch, 8... Mount.

Claims (1)

[Scope of utility model registration request] consisting of a pair of side frames disposed in the longitudinal direction of the vehicle, and a cross member located between the side frames, having both ends connected to the lower surface of the side frames via fasteners, and configured to support an engine on the upper part thereof. Bifurcated branch portions for fastening the fasteners are integrally formed at both ends of the cross member, and a mount for supporting the engine is located at the rear side of the cross member and attached to the side frame. A frame structure of an automobile, characterized in that the frame structure is provided in the vicinity of a joint portion with.