KR100798851B1 - Shock Absorption Structure of Steering Column of Steering System - Google Patents

Abstract

The present invention is coupled to the steering column and mounting bracket having a flat plate portion having a U-shaped groove on both sides; The plate is bent to be inserted and coupled to the groove, and the upper plate and the lower plate are formed to face each other and have a predetermined clearance distance, and a plurality of protrusions are formed to face the upper plate and the lower plate, and a through hole is formed at the center of the upper plate and the lower plate. The formed capsule is provided with a shock absorbing structure of the steering column of the steering apparatus, characterized in that the capsule is assembled to the groove portion of the flat plate.

Steering Device, Capsule, Mounting Bracket, Steering Column

Description

Shock absorbing structure of steering column of steering system {DAMPING STRUCTURE OF STEERING COLUMN FOR VEHICLE}

Figure 1 shows the state before the capsule is assembled to the plate portion of the bracket as a shock absorbing structure of the steering column according to the present invention.

Figure 2 shows the state after the capsule is assembled to the flat portion of the mounting bracket as a shock absorbing structure of the steering column according to the present invention.

3 is a perspective view of a capsule according to the present invention.

4 is a cross-sectional view of a capsule according to the present invention.

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

10: steering column 12: mounting bracket

14: plate 16: U-shaped groove

20: capsule 22: top plate

24: lower plate 26: projection

28: through hole 30: support

32: Bolt

The present invention relates to a steering apparatus, and more particularly, to improve the structure of the capsule that is detachably installed with the mounting bracket, the shock absorbing structure of the steering column of the steering device in which the capsule and the mounting bracket is smoothly separated by using friction force appropriately. It is about.

In general, the steering column is disposed between the steering wheel disposed in the driver's seat and the gearbox connected to the wheels of the vehicle and fixed to the vehicle body, and a steering shaft is provided therein to transmit the rotational force generated from the steering wheel to the gearbox side. Prepared.

In particular, the steering column is retractable in the axial direction so as to exhibit a shock absorbing function when the vehicle collides, which weakens the degree of injury to the driver when the driver and the steering wheel are in close contact with each other. In addition to preventing me and the driver from being injured, it also reduces the impact when the driver hits the steering wheel by inertia.

The steering column is provided to support the steering shaft and has a shock absorbing function. The steering column has a tub-shaped type in which two hollow tubes into which the steering shaft is inserted are inserted into each other, and a wave-shaped cushioning portion between the support portions supporting the upper and lower sides of the steering shaft. It is roughly classified into a tubeless type provided.

Meanwhile, in order to fix the steering column to the vehicle body, a lower bracket is provided on the lower side of the steering column, and a mounting bracket is provided on the upper side of the steering column. The upper mounting bracket is provided with a capsule to be detached when an external shock is transmitted to the steering column. shall.

However, in the related art, through-holes are formed in the mounting bracket and the capsule assembly as a separation structure between the aluminum capsule and the mounting bracket, and the molding part is broken and the shock is absorbed during the steering collision by plastic injection molding.

The above structure requires injection between the aluminum capsule and the mounting bracket, so a separate process and equipment are required, resulting in high production costs, and highly sensitive to injection conditions, so that the release load after injection must be inspected for each lot in order to manage the release load. There is a difficulty.

The present invention is to solve the above problems, can be assembled without a simple assembly and separate equipment, to provide a shock absorbing structure of the steering column of the steering device that can absorb the shock only by the friction of the mounting bracket and the capsule.

In order to achieve the above object of the present invention, a mounting bracket coupled to a steering column and having a flat plate portion having a U-shaped recess on both sides; The plate is bent to be inserted and coupled to the groove, and the upper plate and the lower plate are formed to face each other and have a predetermined clearance distance, and a plurality of protrusions are formed to face the upper plate and the lower plate, and a through hole is formed at the center of the upper plate and the lower plate. The formed capsule is provided to provide a shock absorbing structure of the steering column of the steering apparatus, characterized in that the capsule is assembled to the groove portion of the flat plate.                     

In addition, the through holes formed in the upper plate and the lower plate is characterized in that the support is further formed to maintain a constant distance between the upper plate and the lower plate by extending the edge by burring to the opposite side.

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

As shown in FIG. 1, a mounting bracket 12 equipped with a steering column 10 is provided, and both sides of the mounting bracket 12 are U-shaped grooves 16 which can be fixed to a vehicle body using capsules described later. A flat plate portion 14 having is formed.

As shown in FIG. 3, the capsule 20 inserted into the U-shaped groove 16 may be bent in two stages of a square aluminum plate so that the side cross-section thereof has a “c” shape. That is, the upper plate 22 and the lower plate 24 are formed to face each other at a predetermined distance by the two-stage bending of the plate.

When the capsule 20 is coupled to the plate portion 14 of the mounting bracket 12, the upper plate 22 and the lower plate 24 of the capsule 20 in contact with the plate portion 14 in a direction opposite to each other. A plurality of protrusions 26 are formed. The protrusions 26 are formed by punching on the opposite side of the protruding surface, and the shape of the protrusions 26 and the formation position of the protrusions 26 or the number of the protrusions can be adjusted depending on the collision characteristics of the vehicle within 1 to 6. .

In the center of the upper plate 22 and the lower plate 24, the through-hole 28 in the longitudinal direction that becomes a bolt hole when the capsule 20 is bolted to itself after being fastened to the U-shaped groove 16 of the mounting bracket 12 Is formed. When the through hole 28 is formed in the upper plate 22, a burring process is applied to the lower plate side so that the edge of the through hole 28 extends to the lower plate side, and the upper plate 22 is formed when the through hole is formed in the lower plate 24. As shown in FIG. 4, the support 30 is naturally formed between the upper plate 22 and the lower plate 24 by burring to the side so that the edge of the through hole 28 extends toward the lower plate 24. The support 30 may be formed only on one side when burring the through hole 28 formed in the upper plate 22 or the lower plate 24. That is, only one side may be burring.

The support 30 maintains the clearance distance between the upper plate 22 and the lower plate 24 when the capsule 20 is assembled to the flat plate 14 and then bolted to the vehicle body 32. Even if the tightening force is excessive, the friction force between the projection 26 and the mounting bracket 12 is made constant.

As described above, in the past, the mounting bracket and the capsule assembly made a through groove and a plastic injection molding, so that the molding part is broken during the steering collision and absorbs energy. Although the injection conditions have been quite demanding, according to the present invention, since the structure absorbs shock only by the friction force between the capsule and the mounting bracket, the structure and assembly are simple, and a support is formed between the upper plate and the lower plate, so that excessive tightening force is caused by bolting when assembling the steering column. Even when generated, it is possible to maintain a constant frictional force.

Claims (4)

A mounting bracket coupled to the steering column and having a flat plate having a U-shaped recess on both sides; The plate is bent to be inserted and coupled to the groove, and the upper plate and the lower plate are formed to face each other and have a predetermined clearance distance, and a plurality of protrusions are formed to face the upper plate and the lower plate, and a through hole is formed at the center of the upper plate and the lower plate. The capsule is formed and the capsule is assembled to the recessed portion of the flat plate, the through hole formed in the upper plate and the lower plate is formed by a support for maintaining a constant distance between the upper plate and the lower plate by extending the edge by burring to the opposite side mutually Shock absorption structure of the steering column of the steering apparatus, characterized in that. delete delete The method of claim 1, The support for forming the through-holes of the upper plate and the lower plate by the burring process, the shock absorbing structure of the steering column of the steering apparatus, characterized in that only one side of the upper plate and the lower plate is formed.

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