KR20020049078A - Torsion bar spring able to change spring constant for automobiles - Google Patents

Abstract

PURPOSE: A torsion bar spring for varying a spring constant of a vehicle is provided to improve traveling safety as changing the spring constant according to range of torsion impact during traveling from changing structure of the torsion bar spring, and to simplify assembling processes as having a simple structure. CONSTITUTION: A torsion bar spring for varying a spring constant of a vehicle consists of an inner bar(100) shaped a cylindrical rod and having many hanging protrusions(110) in the outer face; an outer bar(200) shaped a pipe and having many hanging grooves(210) in the inner face to contact with the hanging protrusions when the inner bar is inserted in the center and is rotated in constant angle. When torsion transferred in the torsion bar spring is small, the inner bar of the torsion bar spring is twisted first. The hanging protrusions in the inner bar are rotated together, but aren't contacted with the hanging grooves in the outer bar. The only inner bar absorbs torsion. When torsion transferred in the torsion bar spring is large, the inner bar of the torsion bar spring is twisted first. The hanging protrusions in the inner bar are rotated together and the hanging protrusions are contacted with the hanging grooves. Torsion transferred in the inner bar is transferred in the outer bar through the hanging protrusions and the hanging grooves. The torsion bar spring is formed multi-stages and is operated in the proper spring constant according to range of torsion transferred in a vehicle as changing the spring constant.

Description

Spring constant variable torsion bar springs for automobiles {Torsion bar spring able to change spring constant for automobiles}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable spring constant torsion spring of an automobile, and in particular, a device for changing the spring constant according to the amount of torsional shock generated when driving by changing the structure of a torsion spring provided in an automobile, thereby improving driving stability. The present invention relates to a spring constant variable torsion spring of an automobile, which has a simple structure and can simplify an assembly process.

In general, the torsion bar spring is composed of the rod of spring steel, and it is possible to return to the original shape by stiffness by twisting the rod of spring steel. The spring constant is determined by the length and cross-sectional area of the bar. Similarly, there is no vibration damping effect, so it is necessary to use shock absorbers in parallel.

The torsion bar spring is lighter because the energy absorption rate per unit weight is higher than that of other springs. The torsion bar spring has the advantage of simple structure, etc., and the vertical laying type parallel to the vehicle body and the horizontal laying type by the arrangement method. The vertical laying type is not limited by the length of the torsion spring and does not occupy a place for installation.The torsion spring is generally circular in cross section, but overlaps the flat spring steel. It is sometimes used to make a rectangle.

1 is a view showing a suspension device having a torsion bar spring of a typical vehicle,

As shown in FIG. 1, a torsion bar spring 10 of a typical vehicle is a suspension device that is fastened to the suspension arm 30 together with the shock absorber 20 to absorb various impact forces transmitted to the vehicle. It is absorbed, and is formed of an integral circular rod material, and its structure is very simple, easy to calculate the spring constant, and is inexpensive and is provided in various vehicles.

In addition, by changing the shape and material of the cross-section can be adjusted to the desired spring value, there is an advantage that takes up little space than other springs.

However, the torsion spring of a general vehicle is fastened with a spring constant determined appropriately for the weight of the vehicle, and the torsion spring does not play a role when the weight of the vehicle exceeds or falls below a certain range. Active suspensions with actuators have a technical problem that their price is difficult to apply to a general vehicle.

The present invention is to solve the above problems, by changing the structure of the torsion bar spring provided in the vehicle by changing the spring constant according to the magnitude of the torsional shock generated during driving to improve the running stability, the structure is simple assembly process To provide a spring constant variable torsion spring for automobiles to simplify the process.

The present invention is an inner bar having a plurality of engaging jaw on the outer peripheral surface in the form of a circular rod; The inner bar is inserted into the center and is achieved by constructing a pipe-shaped outer bar having a plurality of engaging grooves formed on the inner circumferential surface so as to contact the locking jaw when rotating at an angle.

1 is a view showing a suspension having a torsion bar spring of a typical vehicle;

Figure 2 shows a spring constant variable torsion spring of the automobile of the present invention

Perspective,

3 is transmitted to the spring constant variable torsion spring of the vehicle of the present invention

Graph showing spring constant of torsion bar spring measured against torsion.

<Explanation of symbols for the main parts of the drawings>

100: inner bar 110: locking jaw

200: outer bar 210: locking groove

Figure 2 is a perspective view showing a spring constant variable torsion spring of the vehicle of the present invention, Figure 3 is a graph showing the spring constant of the torsion spring spring measured against the torsion to the spring constant variable torsion spring of the vehicle of the present invention to be.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 2, the spring constant variable torsion bar spring of the vehicle of the present invention is an inner bar (100) having a plurality of engaging jaw 110 on the outer peripheral surface in the form of a circular rod; The inner bar 100 is inserted into the center is formed of a pipe-shaped outer bar 200 formed with a plurality of engaging grooves 210 on the inner circumferential surface so as to contact the locking jaw 110 when rotated by a certain angle. It features.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 2 to 3.

As shown in FIG. 2, when the torsion bar spring transmitted to the torsion bar spring provided in the suspension device of the vehicle is small, the inner bar 100 of the torsion bar spring is twisted first, and formed on the inner bar 100. The locking jaw 110 also rotates together, but does not come into contact with the locking groove 210 formed in the outer bar 200, so that only the inner bar 100 absorbs the torsion.

In addition, when the torsion bar spring is torsionally transmitted, the inner bar 100 of the torsion bar spring is twisted first, and the locking jaw 110 formed on the inner bar 100 also rotates together, and the inner bar The locking jaw 110 that was rotated together with the 100 comes into contact with the locking groove 210 formed in the outer bar 200, and the torsion transmitted to the inner bar 100 is the locking jaw 110 and the locking groove ( It is transmitted to the outer bar 200 through the 210.

In this manner, as shown in Figure 3, when the torsion bar spring torsion is small when the torsion bar spring is operated only by the spring constant of the inner bar, the torsion bar spring torsion is large when the torsion spring The torsion bar spring is operated with the spring constant of the bar and the outer bar overlapping.

In the same way, the torsion bar spring may be formed in multiple stages of three or more stages, and the torsion bar spring formed of three or more stages of the torsion spring has a variable spring constant in multiple stages and torsion with a suitable spring constant according to the size of the torsion transmitted to the vehicle. The spring is activated.

The present invention as described above is to change the structure of the torsion bar spring provided in the vehicle to change the spring constant in accordance with the magnitude of the torsional shock generated during driving to improve the running stability, the structure is simple, the inventor can simplify the assembly process will be.

Claims (1)

An inner bar having a plurality of locking jaws on its outer circumferential surface in the form of a circular rod; A spring constant variable torsion bar spring of an automobile, wherein the inner bar is inserted into the center and formed of a pipe-shaped outer bar having a plurality of locking grooves formed on an inner circumferential surface thereof so as to contact the locking jaw at a predetermined angle of rotation.