JPS6021337Y2 - Suspension cross member support structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a rubber mount type support structure that is attached to a suspension cross member vehicle body via an elastic body.

Generally, the suspension cross member in a rubber mount type support structure does not function as a strength member to receive or block lateral force, so as shown in Figure 1, a separate side frame reinforcing member is installed between the side frames 3 fixed to the vehicle body. The suspension cross member C is installed.

Conventionally, as shown in FIG. 3, this suspension cross member support structure is fixed to the lower surface of the vehicle body floor d in the longitudinal direction of the side frame a, while the side frame reinforcing member is attached to the side end section of the side frame a. The end of the suspension cross member C is superimposed on the lower surface of the side frame reinforcing member via the elastic body e, and the bolt f is inserted and fixed into the side frame a to fit the lower part of the side frame a. Penetrate from floor d and screw together nut g,
The suspension cross member C is configured to be fixed to the side frame a, and a suspension link i is swingably supported on the suspension cross member C. The lower surface and the lower surface of the side frame a are in contact with each other without any gap and are fixed to the side frame a.

In the above support structure, looking at the relationship of action of lateral force,
As shown in FIG. 4, the acting force FH input from the suspension link i is applied to the pivot point 2 of the suspension link i, and the acting force FB input from the vehicle body floor d is applied to the bolt f.
The reaction force Fc, which stops the side frame reinforcing member buttress, acts on the intersection Y with the center line of the bolt f.

Therefore, the acting force FH and the reaction force F.

Considering the balance of moments with the intersection point X at the fulcrum, Fo=FH H−h.

H: Length between pivot point 2 and intersection X 1″1o: Length between pivot point Z and intersection Y becomes.

Therefore, the longer the length, the greater the reaction force F.

However, since conventionally, the lower surface of the side frame a and the lower surface of the side frame reinforcing member are brought into contact with each other, the length becomes long and the reaction force F.

is large, and the reaction force F of the side frame reinforcement member is large.

It was necessary to make it robust in response to the current situation, and it had to be large, with increased wall thickness, which led to the drawbacks of being expensive.

The present invention was developed in view of the above, and the suspension is improved by superimposing and fixing the side frame reinforcing member to the side frame with a predetermined gap between the lower surface of the side frame and the lower surface of the side frame reinforcing member. To provide a support structure for a suspension cross member in which the distance between a link pivot and the lower surface of a side frame reinforcing member is shortened to reduce the reaction force received by the side frame reinforcing member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to embodiments with reference to the drawings.

As shown in Figures 1 and 2, 1 is the vehicle body floor 1.2
is a side frame with a hat-shaped cross section, and a pair of side frames 2 are fixed in the longitudinal direction to both sides of the lower surface of the vehicle body floor 1, and the vehicle body floor 1 and the side frames 2 constitute a closed cross-section frame structure extending in the longitudinal direction of the vehicle body. The vehicle body floor 1 and side frame 2 are provided with bolt holes 1a, respectively.
2a is bored.

Reference numeral 3 designates a side frame reinforcing member, which has a closed cross section at the center, while the upper portions of both end portions are open, and flanges 3a extend upward along the lower wall of the side frame 2. The lower plate 3b has bolt holes 3c drilled in the side end portion thereof.

The side frame reinforcing member 3 is attached to both side frames 2,
The openings at both ends are inserted into the lower part of the side frame 2, and there is a predetermined gap h1 between the lower surface of the side frame 2 and the lower plate 3b. The flange 3a is welded to the side frame 2, and is superimposed and fixed to the lower part of the side frame 2.

Reference numeral 4 designates a suspension cross member, which has a closed cross section in the center, and has bolt holes 4b in the upper plate 4a and openings 4d in the lower plate 4c at both ends. An elastic body 5 is attached to the lower end of the frame reinforcing member 3.
A bolt 6 is provided to pass through the side frame 2, the side frame reinforcing member 3, the elastic body 5, and the suspension cross member 4 in this order from the vehicle floor 1, and the elastic body 7 and washer 8 are attached to the lower part of the bolt 6. The suspension cross member 4 is fixed to the side frame 2 by screwing into the nut 9 via.

Further, a suspension link 10 is swingably supported on the suspension cross member 4 by a pin 11, and a tire 12 is supported on the suspension link 10.

Note that 13 is a spacer provided between the vehicle body floor 1 and the side frame 2.

Here, since the pivot point Z of the suspension link 10 is determined by the size of the automobile, the size of the tires, etc., the length H between the pivot point 2 and the vehicle body floor 1 is the same as in the prior art.

Therefore, the length h2 between the intersection point Y of the side frame reinforcing member 3 with respect to the center line of the bolt 6 and the pivot point 2 is shorter by the gap h1 than the conventional length, and the reaction force F0 received by the side frame reinforcing member 3 is HH FC"H-h2FH"H-ho-hl", which is smaller than the conventional one.

As described above, according to the present invention, the side frame reinforcing member is superimposed and fixed to the side frame with a predetermined gap between the lower surface of the side frame and the lower surface of the side frame reinforcing member, and the suspension link pivot point and the side frame By shortening the distance to the lower surface of the reinforcing member, the reaction force that the side frame reinforcing member receives can be reduced, so that the weight of the side frame reinforcing member can be reduced and at the same time it can be made inexpensive. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional schematic configuration diagram showing the lower structure of an automobile body, Fig. 2 is an enlarged sectional view of section A in Fig. 1 showing an embodiment of the present invention, and Figs. 3 and 4 are conventional examples. The third
The figure is an enlarged cross-sectional view of section A in FIG. 1, and FIG. 4 is a diagram showing the relationship of action of lateral force. 1... Vehicle floor, 2... Side frame, 3... Side frame reinforcement member, 4...
...Suspension cross member, 5,7...
...Elastic body, 6...◆Bolt, 9...Nut, 10...Suspension link, 11...Pin.

Claims (1)

[Scope of utility model registration request] A side frame with a closed cross-section structure is arranged on both sides of the lower part of the car body in the longitudinal direction of the car body, and a side frame reinforcing member with a closed cross-section shape is arranged between the two side frames in the left-right direction of the car body. Both ends of the suspension cross member are fixed to the lower surface side of the side frame, a gap is provided between the lower surface of the side frame reinforcing member and the lower surface of the side frame, and the suspension cross member swingably supports the suspension link. A suspension cross member support structure characterized by overlapping the lower surface of a side frame reinforcing member via an elastic material and fixing it to the side frame with bolts.