KR0176315B1 - Spring supporting structure for leaf spring type suspension - Google Patents

Abstract

The present invention relates to a leaf spring type suspension device for a vehicle, comprising: a knuckle having one end fixed to a frame with a shackle therebetween, the other end of a leaf spring being fixed to a spindle; A lower arm and an upper arm for rotatably supporting the upper and lower ends of the knuckle such that one end thereof is pivotally rotatable and the other end is rotatably supported by a bracket fixedly coupled to the frame, The upper bracket is fixedly coupled to the bracket side end of the upper arm and the upper bracket is fixedly coupled to the front bracket fixed to the front of the frame in the same line. The leaf springs are supported by the leaf springs so as to reduce the amount of deformation and the movement width of the axle due to the load applied to the leaf springs, Structure.

Description

Spring support structure of leaf spring type suspension device

FIG. 1 is a perspective view showing an embodiment of the present invention.

Figure 2a is a perspective view of an embodiment of a knuckle of the present invention;

b is a perspective view showing an upper arm and a lower arm according to an embodiment of the present invention;

FIG. 3 is a view showing a state of engagement of the torsion bar according to the present invention

Figures 4a and b also show the action diagram according to the invention

5 is a schematic view of a conventional leaf spring type suspension device

DESCRIPTION OF THE REFERENCE NUMERALS

10: Knuckle 20: Upper arm

30: Lower arm 40: Upper bracket

50: Lower bracket 60: Torsion bar

70: Front barcket 80: Leaf spring

90: Axle 100: Shackle

[Industrial Applications]

The present invention minimizes the amount of displacement of the axle during turning of the vehicle by making the spring eye of the leaf spring pin-connected from the leaf spill type suspension apparatus of the vehicle to a link structure that is torsion bar-shaped, To the spring support structure of the leaf spring type suspension device.

BACKGROUND ART [0002]

Generally, a suspension device of a vehicle is provided to improve driving stability and turning characteristics while absorbing impact from a road surface to improve ride comfort. Most of such suspension devices are formed by installing a spring between an axle and a vehicle body .

The leaf springs and coil springs are usually used in large-sized commercial vehicles. The coil springs are used in small-sized passenger vehicles. The present invention relates to a leaf spring type It is about suspension.

In general, a leaf spring type is formed by bending a plurality of strip-shaped leaf springs in a slightly bow shape, and as shown in FIG. 5, a hole is drilled in the center of a leaf spring of most of the famous springs and is tightened with a center bolt, So that the spring eye 81 is formed and then pin-coupled with the vehicle body.

In addition, the middle portion of the spring is fixed to the axle 90 by using a U-bolt, and in particular, the spring eye 81 behind the main spring is provided between the shackle 100 and the shackle 100 to allow a change in span. So that it can be fixed to the vehicle body.

On the other hand, the leaf spring 80 as described above has its characteristics determined by the friction between the springs, that is, the friction between the plates makes it possible to attenuate the vibration of the springs as much as possible.

[Problems of Prior Art]

However, when the vehicle is turned at the time of swinging, the vehicle body tends to be outwardly tilted to the outside, and the camber action of the spring is warped. At this time, the center of gravity of the axle 90 is increased and the steering becomes excessive.

That is, since the left and right leaf springs are bent differently due to the rolling phenomenon at the time of cornering, the center axes of the right and left axles are shifted and an axle steering phenomenon is generated in which the axle itself exhibits a steering effect without breaking the handle. There is a problem that the understeering and oversteering phenomena in which the actual turning radius becomes larger or smaller than the turning radius by the steering angle are accompanied by an unstable operation.

[Problems to be solved by the invention]

In order to solve the above-mentioned problems, the present invention is to support one end of a torsion bar to be supported by an upper arm and a lower kdadp having one end connected to a knuckle and a link structure, The upper arm is fixed to one end of the torsion bar so as to minimize center shift of the axle due to deformation of the leaf spring when the vehicle is rolling, thereby providing a stable running during steering.

[MEANS FOR SOLVING THE PROBLEMS]

In order to achieve the above object, the present invention provides a knuckle for fixing a front end spring eye of a leaf spring which is fixed to a frame with a shackle interposed therebetween, the knuckle having one end rotatably supported on the support of the knuckle One end of the lower arm is fixedly connected to the bracket side end of the upper arm and the other end of the lower arm is fixedly connected to the upper bracket and the lower bracket, And the torsion bar is fixedly attached to the front bracket fixed to the front of the frame in the same line.

[Example]

FIG. 1 is a perspective view illustrating a structure of an embodiment according to the present invention. Referring to FIG.

The upper bracket 40 and the lower bracket 50 are fixedly provided on the frame 110. The upper bracket 40 and the lower bracket 50 are respectively provided with upper arms 20, A torsion bar 60 is fixedly coupled between the front bracket 70 and the bracket 40 side of the upper arm 20 so that one end of the arm 30 is rotatable, The other ends of the arm 20 and the lower arm 30 are formed so as to be rotatable about the upper and lower portions of the support 11 of the knuckle 10, respectively.

As shown in FIG. 2 (a) of the drawing, the knuckle 10 is configured such that one end of the spring eye 81 of the leaf spring 80 can be fitted and fixed to the spindle 12 protruded to the die side, Shaped support 11 which is divided into upper and lower parts is integrally formed, and horizontal fastening holes 13 are formed in the upper and lower ends of the support 11, respectively.

As shown in FIG. 2 (B), the fastening end of the upper arm 20 and the lower arm 30 fastened to the knuckle 10 is formed in a yoke shape to support the knuckle 10 11) so as to be rotatably pinned at the upper and lower ends.

3, the upper end of the upper arm 20 on the side of the bracket 40 is rotatably and pin-coupled to the bracket 40, and the upper and lower ends of the upper arm 20 So that the other end of the torsion bar 60 fixed at one end to the front bracket 70 is fixedly engaged so that the torsion bar 60 is rotated by the rotation operation of the upper arm 20. [ So that it can perform a torsional action.

The operation of the present invention in accordance with the above configuration is shown in FIGS. 4A and 4B.

In other words, the rear side spring eye 81 of the leaf spring 80 is pin-coupled by the chassis 100 as before.

However, the front side spring eye 81 is fixed by the support structure of the present invention, so that when the vehicle is turned, the leaf spring 80 of one side, in which the load is concentrated while rolling the vehicle body as shown in Fig. 4 The camber action is reduced by not only the shackle 100 but also the linking action of the upper arm 20 and the lower arm 30 so that the center of the axle 90 is not excessively moved.

Particularly, when the rolling difference is reduced and the difference in the two side loads is reduced, the torsion bar 60 having one end fixed to the end of the upper arm 20 is twisted at the time of the link action. The upper arm 20 and the lower arm 30 are held in their original state so that the upper arm 20 and the lower arm 30 can be quickly released from the rolling state.

That is, when the vehicle is inclined to one side and a certain gravity is applied to the outer leaf spring 80, the knuckle 10, to which one end of the spring eye 81 is pivotally supported by the camber action as shown in FIG. 4 (b) The upper arm 20 and the lower arm 30 each having one end pin-coupled to the supporter 11 of the knuckle 10 are rotated with the brackets 40 and 50 on the frame 110 side The torsion bar 60 torsionally acts on the fixed end of the front bracket 70 by the upper arm 20.

The reduction of the amount of the camber due to the link action of the upper arm 20 and the lower arm 30 is made possible by allowing the leaf spring 80 to flow to both sides around the axle 90. At this time, The center shift amount of the steering wheel 90 can be minimized to minimize oversteering and understeering.

[effect]

Therefore, since the leaf spring fastening structure according to the present invention reduces the camber amount of the leaf spring 80 when the vehicle is turning while the vehicle is turning, the center shift width of the axle 90 is reduced, So that the axle steering phenomenon is minimized.

Especially, as shown in the above-mentioned drawings, since both the support points of the leaf spring 80 are formed to be higher, it is possible to make the uppermost production of the vehicle body more possible.

Therefore, the present invention can provide a steering that is appropriate to the driver's intention when cornering the vehicle while driving, thereby providing a very useful effect of providing precise steering, stable turning ride, and relieving anxiety.

Claims (3)

A knuckle for allowing the other end of the leaf spring to be fixed to the frame by a spindle and having one end thereof fixed to the frame with a shackle interposed therebetween, a bracket having one end rotatably supported by the upper and lower portions of the support of the knuckle, And the other end is connected to the bracket side end portion of the upper arm and the other end is fixed to the front bracket in the same line with the upper bracket, Wherein the torsion bar is fixedly coupled to the torsion bar. 2. The leaf spring type suspension device according to claim 1, wherein the upper end of the upper arm and the lower end of the lower arm are rotatably coupled to upper and lower portions of the support of the knuckle so as to have a yoke shape. Spring support structure. 2. The spring support structure of a leaf spring type suspension device according to claim 1, wherein the upper arm and the lower arm are formed parallel to each other on the knuckle.