KR970005917Y1 - Energy absorber for steering column - Google Patents

Abstract

none

Description

Energy Absorber of Automotive Steering Column

1 is an exploded perspective view of a column tube to which the present invention is applied.

2 is a cross-sectional view of the present invention

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view of the assembly of the column tube to explain the prior art

5 is a cross-sectional view taken along the line B-B of FIG.

* Description of the symbols for the main parts of the drawings *

1: column 2: pike resistant

3: outer pipe 4: plastic bush

5: leaf spring

The present invention relates to a steering column for a vehicle that can absorb impact energy during a collision of the vehicle, and in particular, an energy absorber that absorbs impact energy by collapsing the plastic bushing when the internal and external pipes are buckled. It is about.

As is well known, the column that combines the internal and external pipes is installed at the outer periphery of the steering shaft connecting the gearbox and the steering wheel, fixed to the vehicle body by brackets, and then assists the steering direction of the vehicle. It is well known that internal and external pipes are buckled to absorb impact energy.

However, the conventional automotive steering column 51 inserts the inner and outer pipes 52 and 53 as shown in FIGS. 4 and 5, but the outer of the inner pipe 52 so as to increase the frictional load during the collision of the vehicle. The plurality of protrusions 54 were precisely stamped in the longitudinal direction at the periphery thereof, and the protrusions 54 and the inner surface of the outer pipe 53 were fixed in a state of being in close contact with each other.

The conventional column 51 configured as described above absorbs shock energy in a process of sliding and sliding the inner surface of the outer pipe 53 and the protrusion 54 stamped in the longitudinal direction on the inner pipe 52 during a collision of the vehicle. At this time, the friction is absorbed to some extent, but absorbs the impact energy, but after the initial stage, the protrusion 54 enters and loses the impact energy to absorb friction energy, so that it is impossible to absorb sufficient impact energy, which may cause a fatal damage to the driver. In addition, since the protrusion 54 must be accurately stamped from the inner pipe 52, a problem is caused that the operation is difficult and the load management is difficult to maintain.

The present invention was devised to solve the above-mentioned problems, and the main purpose of the present invention is to simply press-in a plastic bushing molded with a leaf spring between the inner and outer pipes of a column with a constant load, and then curl the buckling. In addition, it is not only to absorb the impact energy so as not to impact the driver, and also to maintain the load control by the ease of indentation.

Another object of the present invention is to improve the work efficiency and reduce cost by facilitating production by injecting plastic leaf springs into a certain circumferential surface of the plastic bush that absorbs impact energy while buckling during buckling to absorb impact energy. Intention is the feature.

When the present invention to achieve the above object will be described in detail by the accompanying drawings as follows.

1 is an exploded perspective view of an applied column tube of the present invention, FIG. 2 is a cross-sectional view of the present invention, and FIG. 3 is a cross-sectional view taken along line A-A of FIG.

As shown in FIGS. 1 to 3, there is a column 1 to press the internal and external pipes 2 and 3 at a constant load to absorb impact energy, and a plurality of columns are provided between the internal and external pipes 2 and 3. It is made by press-fitting the plastic bush 4 which injected the two leaf | plate springs 5 to a molded load.

At this time, the leaf spring (5) is preferably molded in four places in the circumferential 90 ° position of the plastic bush (4).

The plastic leaf spring 5 may be press-fitted at a point circumferentially of the plastic bush 4 by forming an insertion hole on a 90 ° line.

The present invention constructed as described above is fixed to the vehicle body while protecting the steering shaft during driving, and when collision energy is generated during driving, the plate of the plastic bush 4 press-fitted with a constant load between the inner and outer pipes 2 and 3 of the column 1. As the spring 5 continuously supports the outer circumference of the inner pipe 2 and the inner circumferential surface of the outer pipe 3 by elastic force, the spring 5 absorbs energy in impact while collapsing during buckling, thereby sufficiently absorbing impact energy. Even if the plate spring 5 is pressurized with a constant load into the insertion hole formed in the circumferential 90 ° line of the plastic bush 4, the plate between the inner and outer pipes 2 and 3 of the column 1 is effective. While the contact force is continuously supported by the elastic force of the spring (5), the impact energy is absorbed, while the control of the load is advantageous and the production is very useful.

Claims (3)

The inner and outer pipes (2) and (3) are coupled to the column (1) to absorb the impact energy, the plastic bush (molded a plurality of leaf springs 5 between the inner and outer pipes (2) (3) Energy absorbing device of the steering column for a vehicle, characterized in that 4) is pressed in a constant load. The method of claim 1 The leaf spring (5) is an impact energy absorbing device for a steering column for a vehicle, characterized in that the plastic bush (4) is molded in the circumferential position of 90 °. The method of claim 1, Impact energy absorbing device of the steering column for a vehicle, characterized in that by pressing the leaf spring (5) of the plastic bush (4).