JPS642803Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a front wheel support device for an automobile, in which a bracket having a substantially U-shaped cross section is attached to the lower front surface of the vehicle body so as to open laterally and downward.
The steering gear device connected to the steering wheel and the tie rods extending from the steering gear device to the left and right front wheels are housed in the same bracket, and the inner ends of the suspension arms extending from the left and right front wheels are housed in the bracket. A front wheel support device for an automobile in which the bracket is supported near the lower portions of both left and right ends via elastic members, and a front lower portion and a rear lower portion near both left and right ends of the bracket are connected by a reinforcing member, wherein at least one end of the reinforcing member is supported via an elastic member. The vehicle is characterized in that it is connected to the bracket, and its purpose is to improve riding comfort. Another object of the present invention is to provide an improved front wheel support device for an automobile that can reduce vibrations in the circumferential direction of the steering wheel.

Next, the first, second, and
To explain this with reference to an embodiment shown in Figures 3 and 4, 1 is a vehicle body, and 2 is a bracket having a substantially U-shaped cross section. is fixed. Further, 3 and 3 are left and right front wheels, and 4 and 4 are lower arms (suspension arms) extending inward from each of the front wheels 3, and the inner ends thereof are located near the front lower part of both left and right ends of the bracket 2. It is rotatably supported via a known elastic bushing or the like. Further, numeral 5 denotes a steering handle, 6 a steering gear device provided in the bracket 2, 7, left and right tie rods extending from the steering gear device 6 to each of the front wheels 3, and 8 a steering gear device of the bracket 2. Bolts to attach the upper part to the vehicle body 1,
Reference numeral 9 indicates left and right reinforcing members; 10 in FIGS. 2, 3, and 4 indicates a bolt for attaching the front end of each reinforcing member 9 to the front lower part of both left and right ends of the bracket 2; 11 indicates a bush made of an elastic material; It consists of an inner cylinder part 11a, an outer cylinder part 11c, a connecting part 11b that connects the inner and outer cylinder parts, and upper and lower stopper parts 11d and 11e.
0 and the reinforcing member 9. Also 1
0' connects the rear end of each reinforcing member 9 to the bracket 2.
This bolt is attached to the rear lower part of both left and right ends of the bolt 10', and bushes made of elastic material are also interposed around the bolt 10' and the bolt 8.

The vehicle front wheel support device of the present invention is constructed as described above, and can achieve the following effects. That is, the input from the front wheels 3 is transmitted to the vehicle body and the steering handle 5 via the suspension arm (lower arm) 4 and the bracket 2. At this time, in the front wheel support device of the present invention, at least one end of the reinforcing member 9 is connected to the elastic member (elastic material bushing in the embodiment) 11.
It is connected to the bracket 2 via the bracket 2, which reduces the front and rear stiffness of the suspension and improves riding comfort.

Further, in the front wheel support device of the present invention, as described above, at least one end of the reinforcing member 9 is connected to the bracket 2 via the elastic member 11, so that vibrations in the circumferential direction of the steering handle 5 can be reduced. Regarding this point, we measured the relationship between the acceleration in the circumferential direction of the steering wheel and the additional unbalance on the tire circumference for the proposed system and a rigidly connected system (reinforcing member 9 and bracket 2 rigidly connected). As a result, the results shown in Figure 5 were obtained.
is the measurement result of the present invention, and is the measurement result of the case where is rigidly connected.In the case of the present invention, the acceleration in the circumferential direction of the steering wheel decreases. Moreover, as shown in FIG. 6, in the case of the present invention, the peak value of the acceleration in the circumferential direction of the steering wheel shifted to a lower vehicle speed than in the case of rigid connection (see arrow). If the peak value of acceleration in the circumferential direction of the steering wheel decreases toward lower vehicle speeds, the vibration-exciting force due to unbalanced tires also decreases. It has the effect of reducing

In this embodiment, a bush made of elastic material is also interposed around the bolt 10'. In that case, the phase of the input is reversed between the bolt 10 and the bolt 10', and a canceling effect of the input occurs, reducing the sound inside the car from that in the case of rigid connection to that in the case of the present invention, as shown in Fig. 7. did.

FIG. 8 shows the connecting portion 11 of the bush 11 made of elastic material.
In another embodiment in which a hollow portion 11f is provided in b, the riding comfort can be further improved as shown in FIG. In FIG. 9, is the case of the above-mentioned embodiment, ' is the case of this embodiment, and is the deflection characteristic in the case of rigid connection. Further, FIG. 10 shows another embodiment in which a pipe (distance piece) 13 is interposed between the bolt 10 and the bush 11 made of elastic material, and FIG. In yet another embodiment in which bushes 11' and 11' made of elastic material are interposed, the same effects as the front wheel support device shown in FIGS. 1 to 4 can be achieved in each of the above embodiments.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the front wheel support device for an automobile according to the present invention, Fig. 2 is a side view thereof, and Fig. 3
The figure is a vertical side view showing an enlarged view of the main parts, Figure 4 is a cross-sectional plan view taken along the arrow line in Figure 3, Figure 5 is
6 and 7 are explanatory diagrams of its operation, FIG. 8 is a cross-sectional plan view showing another embodiment, FIG. 9 is an explanatory diagram of its operation, and FIGS. 10 and 11 are explanatory diagrams showing still other embodiments. It is. 1...Vehicle body, 2...Bracket, 3...Front wheel,
4... Suspension arm, 5... Steering handle, 6... Steering gear device, 7... Tie rod, 9
...Reinforcing member, 11...Elastic member.

Claims (1)

[Scope of utility model registration request] A bracket having a generally U-shaped cross section is attached to the underside of the front of the vehicle body so that it opens horizontally and downwardly, a steering gear device connected to a steering handle and tie rods extending from the steering gear device to the left and right front wheels are housed within the bracket, and inner ends of suspension arms extending from the left and right front wheels are supported near the left and right lower ends of the bracket via elastic members,
A front wheel support device for an automobile in which the front and rear lower portions near the left and right ends of the bracket are connected by a reinforcing member, characterized in that at least one end of the reinforcing member is connected to the bracket via an elastic member.