KR19990015762U - Shape of Shock Absorbing Member - Google Patents

Abstract

The present invention relates to a steering apparatus of a vehicle, and more particularly, to the shape of the shock absorbing member formed so that the steering wheel is not pushed in the direction of the driver when the vehicle collides with the obstacles in front of the vehicle.

The present invention is installed inside the steering column 10 to form a cross-section irregularly to absorb the bending moment by elasticity in the cross-section of the shock absorbing member 30, the bending moment occurs when the vehicle impacts the rear of the steering wheel It is possible to provide the shape of the shock absorbing member to minimize the displacement.

As a result, it is possible to provide the shape of the shock absorbing member that minimizes the injury of the driver due to the collision of the steering wheel and the driver.

Description

A shape of energy absorbing bar

The present invention relates to a steering apparatus of a vehicle, and more particularly, to the shape of the shock absorbing member formed so that the steering wheel is not pushed in the direction of the driver when the vehicle collides with the obstacles in front of the vehicle.

Steering system is a device used to change the direction of travel of a vehicle. Steering wheel, steering shaft and column control mechanism, worm sector type, worm sector roller type, ball nut type, variable gear ratio type, rack Steering gear mechanism such as pinion type and link mechanism composed of Peterman arm, steering link, steering knuckle, etc., and a mechanical steering device that transmits the steering wheel rotation to the driving wheel through the steering gear, Power steering using a cylinder is used.

The steering wheel and the steering shaft are also equipped with switching means for operating a vehicle horn such as a horn pad and a steering lock assembly for starting the vehicle.

The steering shaft, which connects the steering wheel and the steering gear mechanism to the steering mechanism, is used as a safety device to protect the driver's body when the vehicle collides with an obstacle, and a shock and energy absorption safety mechanism is used. . These safety mechanisms are assembled with a collapsible steering shaft provided with a column for absorbing shock or energy on the outside of the steering shaft in order to alleviate the impact when the driver collides with the steering wheel during a collision.

1 is an exploded perspective view of a conventional steering wheel and a steering shaft.

As shown, the conventional steering wheel (1) is provided with a horn pad (2) for operating the horn via a dynamic damper (3), the front end of the steering shaft (5) to provide the direction indicator and wiper operation Is equipped with a column switch assembly (4). Upper and lower columns (8, 10) are installed on the outside of the steering shaft (5) divided into upper and lower parts, and the upper column (8) with the lower bracket (11) and the lower column (10) with the upper bracket (9). Is fixed to the body. In addition, a portion of the steering shaft extending into the interior of the vehicle is accommodated in a casing composed of the upper cover 13 and the lower cover 12.

On the other hand, the steering lock assembly 6, which is a starting device, is installed as a clamp 7 on the upper column 8, as shown. The steering lock assembly 6 is a device including a starting device for starting the vehicle and a steering wheel lock device for preventing rotation of the steering shaft 5 when the starting key is not inserted.

2 is a perspective view of a shock absorbing member according to the related art, which is schematically illustrated by drawing part A of FIG. 1, and FIG. 3 is a cross-sectional view of a shape that appears when a steering wheel having a conventional shock absorbing member collides with each other. It is.

As shown in Figure 2, the conventional shock absorbing member 20 accommodated in the lower column 10 is composed of a bar having a constant cross-sectional size.

Thus, as shown in Figure 3, when the conventional shock absorbing member 20 is applied to the impact load by the impact of the vehicle in the state installed in the lower column 10, the shock absorbing member 20 to the steering column In addition to the tendency to push in the direction of the direction of the impact load and the direction in which the shock absorbing member 20 is pushed in because the moment does not occur.

The original purpose of the shock absorbing member 20 is to prevent the collision between the driver and the steering wheel by pushing the shock absorbing member 20 in the direction of the steering column when the vehicle collides, the shock absorbing member 20 When the moment occurs in the shock absorbing member 20 is not pushed well in the direction of the steering column by the moment will not be able to properly exhibit the re-function.

However, the conventional shock absorbing member 20 is formed in the same cross-sectional area, the strength of each cross-section is the same. Therefore, when the moment is generated, rather than absorbing the moment in the portion of the shock absorbing member 20 absorbs the moment throughout the shock absorbing member 20, the shock absorbing member tends to move in the direction of the steering column. There is a problem that the rear wheel of the steering wheel is generated by obstruction.

In order to solve this problem, an object of the present invention is to form a portion of the bending moment generated in the shock absorbing member during the impact of the car to absorb the shape of the shock absorbing member to move the shock absorbing member quickly in the direction of the steering column To provide.

Thus, to provide a shape of the shock absorbing member to minimize the injury caused by the driver hit the steering wheel.

1 is an exploded perspective view showing a configuration of a general steering wheel and a steering shaft.

FIG. 2 is a perspective view of a shock absorbing member according to the related art, which is schematically illustrated by sunrise of part A of FIG. 1.

3 is a cross-sectional view of a shape appearing when a conventional steering wheel having a shock absorbing member collides with each other.

4 is a perspective view schematically showing the shock absorbing member of the present invention.

5 is a cross-sectional view of a shape appearing when the steering wheel provided with an impact absorbing member of the present invention collided.

<Description of Major Symbols Used in Drawings>

10: lower column 20, 30: shock absorbing member

31: taper

To achieve this object, the present invention provides a shape of the shock absorbing member in which the cross section of the shock absorbing member accommodated inside the steering column is formed unevenly.

In addition, the cross section of the shock absorbing member of the present invention provides a shape of the shock absorbing member, characterized in that the center portion is formed to be reduced.

In addition, the cross-sectional reduction of the shock absorbing member of the present invention provides a shape of the shock absorbing member, characterized in that the tapered is formed in the central portion in the longitudinal direction is reduced.

In addition, the direction of the taper of the present invention provides a shape of the shock absorbing member, characterized in that the cross section is formed to be reduced in the upward direction.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the shape of the shock absorbing member according to the present invention in detail.

4 is a perspective view schematically showing the shock absorbing member of the present invention, Figure 5 is a cross-sectional view of the shape that appears when the steering wheel provided with the shock absorbing member of the present invention collided. As shown in Figure 4, the shape of the shock absorbing member 30 according to the present invention is irregularly formed in cross section. By the way, the irregular cross section may be formed in various ways, but in the present invention, the central portion is formed to be tapered in the longitudinal direction. The direction in which the taper 31 is formed is formed such that the cross section is gradually reduced toward the upper direction.

Referring to the operation of the shock absorbing member according to the present invention when the vehicle provided with the shock absorbing member of the present invention formed as described above is as follows.

As shown in FIG. 4, when the shock absorbing member 30 is installed, a direction of movement and a direction in which the shock load is applied do not coincide, and a bending moment is generated when an impact load is applied to the shock absorbing member 30. Done. When the bending moment is applied to the shock absorbing member, the bending moment prevents the shock absorbing member from moving in the steering column direction.

However, in the shock absorbing member 30 of the present invention, since the central portion of the shock absorbing member 30 is formed to be tapered 31 in the longitudinal direction, the impact load acts on the taper 31 of the shock absorbing member. While absorbed, the shock absorbing member 30 moves in the direction of the steering column, thereby providing a shape of the shock absorbing member having no rearward displacement.

Accordingly, the present invention is installed inside the steering column 10, the steering wheel by irregularly forming a cross section to absorb the bending moment by elasticity in the cross section of the shock absorbing member 30, the bending moment occurs when the vehicle collision occurs It is possible to provide the shape of the shock absorbing member to minimize the rear displacement of the.

As a result, it is possible to provide the shape of the shock absorbing member that minimizes the injury of the driver due to the collision of the steering wheel and the driver.

Although one specific embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and those skilled in the art may make various changes and modifications based on the technical idea of the present invention.

Claims (4)

The shape of the shock absorbing member is formed in a non-uniform cross-section of the shock absorbing member accommodated inside the steering column. The shape of the shock absorbing member according to claim 1, wherein the cross section of the shock absorbing member is formed such that a central portion thereof is reduced. 3. The shape of the shock absorbing member according to claim 2, wherein the reduction in the cross section of the shock absorbing member is reduced by the taper formed at the central portion in the longitudinal direction. The shape of the shock absorbing member according to claim 3, wherein the direction of the taper is formed such that its cross section is reduced in the upward direction.