JPS6056674A - Front suspension for automobile - Google Patents

Abstract

PURPOSE:To solve a problem of difference in symmetrical steering characteristics, by making a tilt angle of a tie rod looking on a body horizontal plane differ at both sides. CONSTITUTION:When lateral force F acts on a wheel 1a at the right side in time of turning around, some deformation based on this lateral force is produced in each of rubber bushes 5a and 6a attaching a suspension arm 2a to a car body 3 whereby such a displacement as showing a line La is produced in the wheel 1a. This displacement direction is dependent upon a sense of axes of these rubber bushes 5a and 6a and their rigidity so that it may consider that front wheels 1a are coupled with the car body by one arm in a direction of the like La in view of the principle of equivalence. A tie rod 9a is being tilted rearward at an angle alphaa and an extension line of its axis is crossed with the line La at a point Oa. This intersection point Oa is in a moment turning center of the displacement produced in the front wheels 1a, meaning that the more this intersection exists rearward than an acting point of the lateral force F, that is, the larger at the angle alphaa the stronger in a toe-in tendency. Thus, the tilt angle is made to differ at both sides whereby a difference in symmetrical steering characteristics is eliminated.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a front suspension of an automobile.

In particular, the present invention relates to the integration of the front suspension and steering equipment of a motor vehicle.

(Prior art) In a front-engine, front-drive vehicle, if the Enson Yang 14 type is used, the power unit, including the transmission mechanism, stops, but it deviates laterally from the center line in the longitudinal direction of the vehicle, which affects the steering. A single-axis eye 1 ■ A single-chop cargo falcon is made to know left and right. Furthermore, even among rear-drive automobiles, which are often used by one person, the front wheel loads generally differ between the left and right wheels. In this way, there is a difference in front vehicle load 1 on the left and right.
The result is that the cornering force Ne1 that acts on the vehicle is different when turning to the right and when turning to the left, resulting in a difference in the steering characteristics for lI:right. In order to solve this further problem, in the Shojima Sho 56-/Da/GT) No. 3, the elasticity of the rubber bushings for the suspension arm F41 of the front wheel to allow TL3 to be applied was made different between the left and right sides, and the left and right steering characteristics were changed. A structure with an attached structure that offsets the difference has been proposed. With this structure, if the rubber constituting the rubber bushing changes in its properties due to aging, etc., it will no longer be possible to achieve the desired effect.

(Object of the Invention) In view of the above points, it is an object of the present invention to provide a steering configuration that can cancel out the differences in left and right steering characteristics.

(Structure of the Invention) In order to achieve the above-mentioned object, the present invention has the following structure. That is, g! according to the present invention! ! The front suspension of the 111 RAT extends in the volume direction on each side of the vehicle, and one end is a single piece with a vertical width of 11 υ 1: k
This JIM (tj kerawata suspension arm, l
1ilEi6The suspension arm is rotatably attached to the other end of the suspension arm, and the wheel support portion that supports the front wheel of the vehicle rotates automatically, and the knuckle that is bent in the direction of the single shaft support. The arm is set at the center of the vehicle in the longitudinal direction when viewed from the plane of the vehicle, so that the steering characteristics on the left and right sides are biased, and the difference between the steering forces on the left and right sides is canceled out. It is characterized by having different inclination angles of the tie rods on the left and right sides with respect to the line.To explain the principle of this R=light with reference to Fig. It is attached to the single unit 8 through the suspension arm 2a%2b.
Column pair of 1 and Maechiwa 1ablb support h! June 7a,
The inner ends of the suspension arms 2abp and 7b are connected to each other through rubber bushings 5as, 6as, 5b) fib. Car edition support Tofu 17a1? A knuckle arm 8ab8b is provided at tll, and the knuckle arm 8"b8b is connected to the steerer cylinder mechanism 10 via the tar f rod 9a, 9t, respectively. When turning, the stone side Considering the lateral force F acting on the wheel la, the rubber bushing 5avaaKVi that allows the suspension arm 2a to be attached to the vehicle body 8 is deformed based on this lateral force, and the i1 wheel 1a is applied in the direction shown by the line La. The direction of this displacement is 58%f of the rubber bushing.
Depending on their rigidity, the anterior ili ring 1a can be seen to be connected to the Jj body by a single arm in the direction of this line La, depending on their rigidity. The tie rod 9a is aligned with the center line X in the longitudinal direction of the vehicle body.
4. It is inclined backward at an angle αa with respect to the horizontal axis Y, which is at an angle '+A, and the extension line of that axis is La. Father is evil in Oa. This defect Oa is caused by the displacement that occurs on the Mil wheel 1a when a lateral force 17 acts on the loaded wheel 1a. If it is at the rear when looking in the front-rear direction, the front vehicle width is "D" and "T".
A displacement occurs in the direction of 1・-in 1■, and forward Atl, Jd
, 'To-'J' produces an offshore displacement. The displacement No. 1; is the difference between the defect Oa and the point of action of the lateral force F.
The Jlt body rt of l becomes larger as the distance in the J-wave direction increases. If the defect Oa is behind the 4iQ force application point,
As the position of the defect Oa increases, tJ becomes thicker, and the toe-in becomes stronger around 1, resulting in an aperture IL. The same is true for the left wheel 1b.By changing the 1+g oblique angles α8 and αb of the tie rods 9a and 9b on the left and right sides, a difference is created in the longitudinal position of the intersection Oa and Ob, resulting in the left and right steering characteristics. can be made different. By consciously creating this difference in steering weight so that the difference in steering 4' steering force, which is unique to automatic LL, is canceled out,
Ultimately, it is possible to eliminate the burden of left and right steering.

(Effect of the invention) In the present invention, as in RRI, the fta+ <Fi angle with respect to the center line in the longitudinal direction of the vehicle body is not the same on the right side, and the difference in the 1...8-+ angle is noticeable. 11j +i
Since the right steering wheel is also in the direction of eliminating 4 degrees of gender, the overall difference between the left and right steering can be 11. Then, Δ -The difference in the steering characteristics on the right is q'7M-1-
In addition, since there is no need to hide only the elastic modulus of the column (7), it is possible to create a highly sensitive back cover.

(Example) Referring to Fig. 2, Fig. 1, and Fig. 3, the right side niJ middle wheel J8 is the wheel support g1-material 7 a K I! ,! 1 rotation is supported by 1-, and the left side Nt + trunk 1b is also supported by car 1! Theft - (・"rf buttocks 11] '7bK rotatably supported - J ? +,.Hereafter, /, = the structure on the right is Da[
Since it is an image, we will only explain the right side (excerpt, tf7;), and the corresponding parts on the left side are written as ``right (11):'' and ``-'' instead of the subscript a on the right side. 1 and the explanation will be omitted.

Wheel support member 7aKf'i arm Ila is formed Hano 1,
At the tip of this arm Ila is a suspension arm 2aσ'(+': f!
7f); IHI is combined immediately and freely. The suspension arm 2aI'i vehicle body is also ``A31I Arno'' in the TJ direction, and the inner garden is t7. At the two points, the rubber bushing 5a, the placket 18a, which is attached to the vehicle body 8 by ia, are fixed.
5, an inner part 113, and a single thread VC, a cylindrical rubber coated with purple rt]7, and is integrally formed with the outer cylinder 15k:J and the suspension arm 2a. Rubber bushing 5a is 1i41 of the pair of flanges of placket JBa.
Next, the flange and the inner cylinder 10 are tightened by the bolt 18 with a force of 4v11 and a nut 19. The rubber bushes 5a and fia are arranged such that their axes coincide with each other and are inclined rearwardly and outwardly by an angle F with respect to the center line X in the longitudinal direction of the vehicle body.
l:i has been done. In the case of this example, the distance in the vehicle body longitudinal direction of the rubber bushing 5axfla with respect to the point of action of the root F on the front wheel a is 1i- from the 41 point where the force of the comb push 5a is exerted by the lateral force from the rubber bushing 6a. Therefore, the rubber bushing 6a is larger than the rubber bushing 5a.
is larger, and Sailjo fjl-11,8 is line La
It will be displaced in the direction shown by.

The vehicle support hvS old 7a is provided with a knuckle arm 8a extending diagonally rearward, and the tip of the knuckle arm 8a is connected to the outside ψ of the tie rod 9a and WK tr.

ing. The inner end of the tie rod 9a is connected to the steering wheel.
connected to one end of 0. In this example 1, the steering wheel is of the n-rank pinion type, and its steering shaft 20 is connected to the steering wheel (not shown) of the steering wheel. , In the plane shown in the center I2 diagram, the tie rod -1a of the right Iro 11
tel, car body iiT rear center line XK right angle Park! i'
It is inclined inwardly with respect to lil Y, and its inclination angle αa is larger than the inclination angle αb of the left tie rod 9b. In this example, the displacement line La of the pole joint 4a and the 1!11 line of the pole joint 4a are arranged in such a way that the displacement line La of the pole joint 4a and the line 1! The one on the right is h! From the final turn, the slope of the tie rod ua%9b is determined so that the direction of the oversteer eye 111 is cylindrical. Therefore, in this example, the car has a tendency to understeer more when turning left than when turning right! 1υIJ
(There is a young child in 1).

Referring to FIG. 3, the wheel support portion 78 is formed with an arm 21a diagonally upward, and this arm B l a
(1) Tip Kld: The lower end of the suspension strut 22a is tipped. The upper end of the suspension strut [2a is rotatably attached to the vehicle body 8.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view of the front suspension 4 illustrating the principle of the present invention, W'', 2-1 is a plan view showing an example of the Kinoe Jll+ Kazuya embodiment, Figure 3 is its rear view, and Figure 3 is a rear view thereof. is a cross-sectional view of the handle and bushing to which the suspension arm is attached.

Claims (1)

[Scope of Claims] For each vehicle body, a suspension tension arm extends in the lateral direction of the vehicle body and has one end attached to the offshore body so as to be swingable in the vertical direction; It consists of a wheel support member that rotatably supports the front wheels of fJI cars, and a knuckle arm installed on the wheel support member that connects to the steering mechanism of all cars. In the front suspension of a car that has a difference in steering performance, the steering characteristic points of the above-mentioned Y/F rod t' and No/I/Right are canceled out, so that the weight is Wholesale [automobile σ characterized by being different at the corners or left and right] Front suspension.