JPS59109407A - Suspension device for car - Google Patents

Abstract

PURPOSE:To make a suspension device for a car lightweight by connecting the outer ends of both the upper and lower arms set so as to intersect a swing axle in a horizontal plane of projection in an X-shaped form using a twisting axle torsion member and applying spring force to an arm swing control and suspension device. CONSTITUTION:The axis G of the swing axle 3 for the lower arm 2A of a suspension arm 2 and the axis C2 of the swing axle 4 of the upper arm 2B are intersected in a horizontal plane of projection in an X-shaped form. In addition, the outer ends 2a2 and 2b2 of both the arms 2A and 2B are connected 5B1 and 5B2 using a torsion member 5 with a twisting axle 5A and the intersection P of the short and long axles 50 and 51 of each connecting section is located on the axis C3 of the twisting axle 5A. Besides, it passes through the intersection P1 of the arm axis and is located on an axis C4 that makes a right angle with the long axle 51. Consequently, the torsion member 5 receives relative twisting generated between both the arms, controls swing, and applies the spring force of a suspension device by twisting reaction force. As a result, the structure of the suspension device for a car can be simplified and the suspension device can be made lightweight.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspension device for an automobile.

Japanese Utility Model Application No. 53-136718, for example, is known as a suspension device for elastically supporting the wheels of an automobile. As shown in FIG.
1 and the inner end 21a of the upper arm ρ.

The lower arm 21 and the upper arm n are provided to be able to swing up and down about the swing shafts 23A and 23B, and both arms 21 , 22 outer end 211),
The wheel rack is rotatably attached to the knuckle spindle/L/24 connected to the arm 22t), and both arms 21 and Z! A spring is interposed between them.

However, in such a suspension &[, both arms 21 indicated by A and B in the figure, Z! The load will be supported at three points: the pivot point of , and the support point of the spring shown by C, and each of the support points A, B, and O must have great support machinability. for that,
It is necessary to secure a predetermined support rigidity by forming the support member into a J'J thickness or by providing a reinforcing member, which has the drawback of increasing the weight of the vehicle and complicating the structure.

On the other hand, in the suspension device disclosed in Japanese Utility Model Application No. 53-33119, as shown in FIG. To the moving axis illusion,
23B, and the swing shafts 211A, 23
The lower arm 21 and upper arm n move up and down Km with B as the center.
e, and the outer ends 2 of both arms 21 and 22
1b, 221) knuckle spindle/L connected to
The wheels 25 and 171 are rotatably attached to the /24, and a leaf spring name is interposed between the lower arm 4 and the vehicle body member d.

Even with this type of suspension device, the load is supported at three points: the pivot points of both arms 21 and 22, indicated by A and B in the figure, and the support point of the leaf spring, indicated by C. Support points A, B, and C must have high support rigidity.

Therefore, the above conventional example (Utility Model Application No. 53-136718')
51J'), it has the drawbacks of increased weight and complicated structure.

Furthermore, as shown in FIG. 8, the suspension device disclosed in Japanese Utility Model Application No. 50-106814 is similar to the above-mentioned two conventional suspension devices, in that the suspension device has 21 lower arms and 21 door brim arms for attaching the vehicle body cross member. The inner end 2]a, 22a is a swing axis 23 in the front-rear direction of the 11 bodies.
A, is pivotally connected via 2.3B, and the swing shaft 23A
, 23B as the center, the lower arm 21 and the upper arm n are provided to be able to swing up and down, and both arms 21 and 22
A wheel 6 is rotatably attached to the knuck/l' spindle)v24 connected to the outer ends 211) and 22b of the vehicle, and a torsion bar 9 is disposed between the lower arm 21 and the vehicle body member I. .

Even in the suspension device configured in this way, the pivot points of both arms 21 and 22 shown by A and B in the figure,
The fact that the load is supported at three support points, indicated by C, has the drawbacks of increased weight and complicated structure, similar to the two conventional suspension systems mentioned above.

This invention was made in view of the above-mentioned drawbacks of the conventional art, and is configured so that the load is supported only at two points, the pivot points of the lower arm and the upper arm, thereby reducing weight and simplifying the structure. The purpose of the present invention is to provide a suspension device.

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

FIG. 1 is a perspective view of a suspension system according to the present invention, particularly showing a front suspension system. In the figure, 1 is a vehicle body member such as a cross member,
It is provided in the width direction of the vehicle body (not shown) and supports the suspension arm 2. The suspension arm 2 has a lower arm 2A and a door flange arm 2B.The inner end 2a of the lower arm 2A is pivotally connected to the vehicle body member 1 via a swing shaft 3 in the longitudinal direction of the vehicle body, and the outer end 2a swings. It can swing up and down about a shaft 31. and,
The inner end 2b of the upper arm 2B is pivotally connected to the Mt body member 1 via a swing shaft 4 in the longitudinal direction of the vehicle body, and the outer end 2b
, is able to swing up and down about a swing shaft 41.

The axis C1 of the swing shaft 3 and the axis C1 of the swing shaft 4 are
As shown in the figure (plan view), they intersect in an X shape in the horizontal projection plane.

In FIG. 1, reference numeral 5 denotes a torsion member, and 6 a spindle tube. /7 has been set up.

The torsion member 5 is the lower arm 21 door brim arm 2
By connecting the outer ends 2az and 2b2 of B to each other, both arms 2A and 2B are vertically oscillated.
.

In response to the relative threading of 2B, both arms 2A, 2
This is to restrict the free rocking of B, and to apply a spring force to the suspension by the torsional reaction force. That is, as shown in FIG. 3, the torsion member 5 includes a torsion shaft 5A disposed in the vertical direction, and a connecting member 5B fixed to both upper and lower ends of the torsion shaft 5A by, for example, serration joints 8. 5B, Tokaranasi, connecting member 5B, ISE.

It is composed of a bifurcated bracket 5b and a cross-shaped shaft 5b1 supported by the bracket 51). and,
Both ends of the cross-shaped shaft tib between the short axes in the vehicle width direction are rotatably fitted into the through holes 9 formed in the bifurcated bracket (51), and the long sleeves & in the vehicle body longitudinal direction are 1st
Outer ends 2ai of lower arm 2A and hot arm 2B in the figure
, 2'b, and fixed to both arms 2A, 2B, the long axes 51 are normally aligned in the horizontal projection plane as shown in FIG. Further, on the axis CI of the torsion shaft 5A of the torsion member 5 in FIG. As is clear from the figure, it is located on a straight line C4 that passes through the intersection P of the swing axes 3.4 that intersect in an X shape and intersects the long axis at a right angle.

Therefore, due to vibrations while the car is running, the lower arm 2A in FIG.

When the 2bm swings in the center/B direction, for example upward, on the axes C+ and Cx of the swing shafts 3 and 4, the lower arm 2A and Atsuno (the lengths fitted and fixed to the outer ends 2az and 2"Ox of the arm 2B) The axes 151 and 51 intersect in an X shape in the horizontal projection plane as shown in FIG. 4, and are inclined horizontally as shown in FIG. 5 (front view). However, the long axis 5
X-shaped intersection of 1, both arms 2A shown in Figure 4,
Relative torsion in the horizontal projection plane of 2B is regulated by the torsion member 5. That is, both arms 2A,
The relative torsion of 2B is the connecting member 5Bl in FIG.
11B2 acts on both the upper and lower ends of the torsion shaft 5A, the torsion shaft 5A is twisted in mutually opposite directions at both ends, and a thread reaction force is generated on the torsion shaft 5A, thereby imparting a spring force. Instead, the spring force causes both arms 2 to
A force that returns the outer ends 2az and 2bl of A and 2B downward, that is, a suspension elastic supporting force is generated.

On the other hand, the horizontal inclination of the long axis 51 (FIG. 5) and the horizontal inclination of the two arms 2A and 2B are determined by the through hole 9 formed in the hole 51) where both ends between the short axes are closed. It is absorbed by being rotatably fitted into the bridge. Note that when the lower arm 2A and the upper arm 2B swing downward from the state shown in FIG. Due to the reverse action during rocking, the torsion shaft 5A of the torsion member 5 is twisted in the opposite direction to the above-mentioned torsion direction, thereby generating an elastic supporting force of the suspension.

The spindle tube 6 (FIG. 1) is rotatably attached to the torsion shaft 5A via a bearing 10 as shown in FIG. 3. To this end, the knuckle spindle/l/7 rotates around the torsion shaft 5A following the steering operation. In addition, in the case of rear suspension,
The Nupindo/l' cylinder 6 may be directly externally fitted and fixed onto the torsion shaft 6A. 11 indicates a wheel.

In the above configuration, smb in the vertical direction when the car is running is the outer end 2eLx of the lower arm 2A and upper arm 2B.
, 2b* are connected to the torsion shaft 5 of the torsion member 5.
Since it is configured to absorb the load by A, the structure is simple, and moreover, the load is supported only at two points, which are the pivot points of both arms 2A and 2B, indicated by A and B in Fig. 1. Therefore, it is only necessary to ensure a predetermined support rigidity at these two support points A and B, so unlike the conventional suspension device, which requires a predetermined support rigidity at each of the three support points. Compare!
Ii amount, which makes it possible to reduce the weight of the vehicle.

As explained above, according to the present invention, the outer ends of the lower arm and the upper arm, which swing vertically about the swing axes intersecting in an X shape in the horizontal projection plane, The torsion member receives the relative torsion of both arms caused by the swinging and restricts the free swinging of both arms, and also applies a spring force to the suspension by the reaction force of the screw. With this structure, it is possible to reduce the weight of the vehicle and simplify the structure.

[Brief explanation of the drawing]

Figure Wj1 shows the special front suspension of the suspension device according to the present invention, Figure 2 is a plan view showing the relative relationship between the lower arm and the upper arm, and Figure 3 shows the torsion member partially in section. 4 is a plan view showing relative torsion when the lower arm and upper arm swing upward, FIG. 5 is a front view showing the horizontal inclination, and FIGS. 6 to 8 are conventional FIG. 2 is an explanatory diagram showing a Sanupension device. 2A...lower arm, 2B...upper arm, 2a
,,2b□...inner end, 2a, , 2b,...outer end, 3.4...swing axis, CI+ CM...swing axis,
5... Torsion member, 5A... Torsion shaft. Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] (1) A suspension device that elastically supports the wheels of an automobile, and includes a lower arm and an upper arm whose inner ends are pivotally connected to the vehicle body and which swing up and down about a swing axis in the longitudinal direction of the vehicle body. The respective swing axes of the are set to intersect in an X shape in the horizontal projection plane, and the outer ends of the lower arm and the upper arm are connected to a torsion member having a torsion axis in the vertical direction, and the torsion member is An automobile shark is characterized in that the free swinging of both arms is restricted by receiving the relative screws between the arms that occur when the two arms are screwed together, and the full spring force is applied to the suspension by the reaction force of the screws. Pension equipment.