KR19980061804U - Buckling Device of Car Steering Column - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a further proposal of a configuration for enhancing the reliability of operation in protecting the driver by buckling between the connecting bodies of the steering column connected to the steering wheel in the event of a vehicle collision.

2. The technical problem the invention is trying to solve

An object of the present invention is to provide a means for solving the occurrence of buckling in a buckling device of a ball press-fitting configuration.

3. Summary of solution of design

Buckling guide rings 30 at both ends of the lower shaft accommodating tube 11 of the total length L interconnecting the tube buckling portions C formed by the upper shaft accommodating tube 10 and the lower shaft accommodating tube 11. 31) characterized by intervening.

4. Important uses of the devise

In the ball press-type buckling device of the conventional configuration, by further providing a configuration to ensure the forward buckling to improve the reliability of the operation to improve the safety of the driver.

Description

Buckling Device of Car Steering Column

The present invention relates to a buckling device of a vehicle steering column, and more particularly, to improve the reliability of operation in protecting the driver by buckling between connection bodies of a steering column connected to a steering wheel during a collision of a vehicle. Of additional proposals.

The steering column of a car is not a single pipe structure but a pipe connection structure consisting of several pipe-shaped pipes connected to each other, a so-called telescopic steering column, and a plurality of steel balls for buckling at the connection between the pipe bodies. It is common to be provided with a phosphorus ball, and in recent years, a method of puncturing between the tube bodies and integrally injection molding and fixing the tube puncture unit has been devised.

With the above configuration, the steering column is collapsed by a considerable length during the collision of the vehicle so that the column enters the vehicle body so as to prevent the collision between the steering wheel and the driver's face as much as possible.

Among the buckling devices of various types of automobile steering columns, a method of press-fitting assembly between balls is widely used due to the simplicity and reliability of the structure, but has the following problems.

The buckling device configured through the above-mentioned ball is folded in one tubular body while overcoming another tubular ball at the time of application of a collision, and in this process, the ball absorbs impact force by deforming and moving between the tubular bodies, The end of the tubular body of the connecting portion is formed as a pipe member having a cut shape, and the ball is a steel ball of very small diameter, so that the inner tubular body is focused to one point on one side wall surface of the outer tubular body instead of slipping between the tubular bodies during impact buckling. There was a problem that buckling was not induced by the impact force applied.

This is thought to be caused by the fact that the end of the cut pipe end is constructed relatively sharply and the direction of application of the force in which the balls are arranged in an irregular shape is not straight.

In the buckling device of the automobile steering column of the present invention devised in view of the problems of the conventional configuration described above, an object of the present invention is to increase the reliability of the buckling operation by allowing a pair of connected bodies to go straight and buckling.

1 is a plan view of a steering column assembly to which the conventional vehicle steering column buckling device is applied.

2 is a side view of a partial sectional view showing a main portion of a steering column assembly to which a buckling device of a vehicle steering column of a conventional configuration is applied.

3 is a partial cross-sectional view showing a state after buckling of a buckling device of a conventional automobile steering column.

4 is a partial cross-sectional view showing a buckling device of the vehicle steering column of the present invention.

5 is a cross-sectional view of each embodiment of the buckling guide ring used in the buckling device of the vehicle steering column of the present invention.

Explanation of symbols on the main parts of the drawings

1: steering wheel shaft

2: steering upper shaft

3: steering lower shaft

10: upper shaft receiving tube

11: lower shaft accommodation tube

C: tube buckling

S: spline part

30, 31: Buckling guide ring

In view of the above problems, it is an object of the present invention to provide a vehicle steering column buckling device having a configuration that enables efficient and reliable buckling in the event of a collision by further providing a means for imparting straightness to the buckling configuration.

Buckling device of the vehicle steering column of the present invention devised to achieve the above object; The steering lower shaft which is connected to the steering upper shaft and the lower spline shaft connection structure which fixes the steering wheel shaft at one end is interposed inside the upper shaft receiving tube and the lower shaft receiving tube, respectively, and the steering upper shaft and the steering lower shaft are connected. Claims [1] A buckling device of a vehicle steering column, wherein a buckling portion connected to an upper shaft accommodating body and a lower shaft accommodating body and a plurality of buckling steel parts are press-fitted into the pipe buckling portion. It characterized in that the buckling guide ring is interposed at both ends of the lower shaft receiving tube of the full length interconnecting the tube buckling portion constituted by the upper shaft receiving tube and the lower shaft receiving tube.

The accompanying drawings and the buckling device of the vehicle steering column of the present invention will be described in more detail in comparison with the problems of the conventional configuration.

1 is a plan view of a steering column assembly to which a buckling device of a conventional automobile steering column of a general configuration is applied, and FIG. 2 is a side view of a partial sectional view showing the main part of a steering column assembly to which a buckling device of a vehicle steering column of a conventional configuration is applied. 3 is a partial cross-sectional view showing a state after the buckling of the conventional vehicle steering column buckling device, Figure 4 is a partial cross-sectional view showing a buckling device of the vehicle steering column of the present invention, Figure 5 is a vehicle steering column of the present invention It is sectional drawing of each Example of a buckling guide ring used for a buckling apparatus.

As shown in FIGS. 1 and 2 showing a conventional steering wheel of a vehicle, a steering upper shaft 2 which fixes the steering wheel shaft 1 to one end and a steering lower shaft connected in a lower spline shaft connection configuration ( 3) has a configuration interposed inside the upper shaft receiving tube 10 and the lower shaft receiving tube 11, respectively,

A tubular buckling portion (C) to which the upper shaft receiving tube (10) and the lower shaft receiving tube (11) are connected is formed outside the spline portion (S) to which the steering upper shaft (2) and the steering lower shaft (3) are connected. Done.

In the tubular buckling portion C, a plurality of buckling steel balls 20 are press-fitted at the connection surface of the upper shaft receiving tube 10 and the lower shaft receiving tube 11 to the upper portion at the tube buckling portion C at the time of collision. The shaft receiving tube 10 and the lower shaft receiving tube 11 are deformed while overcoming the buckling steel ball 20, so that the shock can be absorbed. 13 is a bracket for mounting the chassis.

As a problem caused in the above-described conventional configuration, the end E of the lower shaft receiving tube 11 interposed inward as shown to the extreme in FIG. 3 is formed on the wall surface 10 ′ of the upper shaft receiving tube 10. When the rotation moment (M) entering the one point (P) side is induced, the case where the buckling is impossible due to normal mutual entry is seen as low, but caused.

Therefore, when such a case occurs, it will cause fatal damage to the driver.

The configuration of the buckling device of the vehicle steering column of the present invention devised in view of the problems of the conventional configuration described above will be described with reference to FIG.

As shown in detail in FIG. 4, in the present invention, the conventional buckling portion C is formed outside the spline portion S side to which the conventional upper shaft receiving tube 10 and the lower shaft receiving tube 11 are connected. A plurality of buckling steel balls 20 are press-fitted between the connection surfaces in the same manner as in the conventional configuration, but the lower part of the entire length L is connected between the upper shaft receiving tube 10 and the lower shaft receiving tube 11. A buckling guide ring (30, 31) is provided at both ends of the shaft housing tube (11).

The buckling guide ring 30, 31 is preferably a conventional ring made of a rigid steel wire, the cross section 32 is preferably circular or elliptical to facilitate sliding.

As described above, through the buckling guide rings 30 and 31 at both ends of the lower shaft receiving tube 11 at the entire length L of the upper shaft receiving tube 10 and the lower shaft receiving tube 11 interconnected. The effect of the buckling device of the steering column of the vehicle of the present invention is configured as follows.

The buckling steel ball 20 between the connecting surface of the tube buckling portion C between the upper shaft receiving tube 10 and the lower shaft receiving tube 11 performs buckling as in the conventional configuration, but at the beginning of the buckling, the lower shaft receiving tube ( 11) allows the end E to enter the inner side of the upper shaft receiving tube 10 and the end E of the lower shaft receiving tube 11 cannot enter the wall surface 10 'side of the upper shaft receiving tube 10. It serves as a kind of gap maintenance.

Therefore, it is useful to perform buckling with high reliability by fundamentally preventing buckling due to feeding into the wall surface as in the prior art.

Preferably, the inner side of the upper shaft accommodating pipe body 10 is drilled through the see-through hole 40 for confirming the mounting of the buckling guide ring 31 to confirm the correct position of the buckling guide rings 30 and 31 during assembly. And for calibration.

The buckling device of the vehicle steering column of the present invention as described above is to improve the reliability of the operation by providing a configuration for ensuring the forward buckling in the ball-indented buckling device of the conventional configuration to improve the safety of the driver.

Claims (3)

The steering upper shaft 2 which fixes the steering wheel shaft 1 to one end and the steering lower shaft 3 which are connected by the downward spline shaft connection structure are the upper shaft receiving tube 10 and the lower shaft receiving tube 11, respectively. Pipe buckling interposed in the inner side and connected by the upper shaft receiving tube 10 and the lower shaft receiving tube 11 to the outside of the spline part S to which the steering upper shaft 2 and the steering lower shaft 3 are connected. In the buckling device of the automobile steering column which press-constructs a plurality of buckling steel balls (20) in the portion (C) and the tube buckling portion (C); Buckling guide rings 30 at both ends of the lower shaft accommodating tube 11 of the total length L interconnecting the tubular buckling portions C constituted by the upper shaft accommodating tube 10 and the lower shaft accommodating tube 11. , 31) buckling device of the vehicle steering column, characterized in that through. The method of claim 1, The buckling guide ring (30, 31) is a ring shape made of a rigid steel wire and the cross section 32 is a buckling device of the vehicle steering column, characterized in that the circular or elliptical shape. The method of claim 1, Buckling device of the vehicle steering column, characterized in that the perforated hole 40 for confirming the mounting of the buckling guide ring 31 in the inner side of the upper shaft receiving tube (10).