KR19980061250A - Steering column lowering device in collision - Google Patents

Abstract

The present invention relates to a steering column lowering device in a collision, a guide pipe coupled to the lower end of the upper steering column to which the steering wheel is fastened and coupled to the lower end of the steering wheel is mounted to protrude out of the guide pipe to the first gear at the free end thereof. A first extension shaft equipped with a second extension shaft supported by a spring having a second gear meshed with the first gear, a third extension shaft connected via the second extension shaft and a universal joint, and A fourth extension shaft splined to the distal end of the three extension shafts, a fourth extension shaft fitted to the fourth extension shaft and splined to the free end, and a fifth extension shaft equipped with a third gear at the free end, and a fourth gear engaged with the third gear, The structure has a sixth extension shaft connected to the steering gear, and the upper steering column descends during the collision of the vehicle, thereby alleviating the impact of the driver, thereby effectively reducing the driver's injury.

Description

Steering column lowering device in collision

The present invention relates to a steering column of a vehicle, and more particularly to a steering column lowering device in a collision to reduce the driver's injury while the steering column is lowered when colliding while driving the vehicle.

In general, a steering device of a vehicle is a device for steering in order to arbitrarily change the direction of movement of the vehicle. An operation consisting of a steering wheel, a steering shaft, a steering column, and the like, for the driver to directly steer and transmit the manipulation force to the steering gear and link. The gear and the gear unit which decelerate the rotation of the steering column to increase the operating force and change the direction of movement of the control mechanism to the link mechanism, and transmit the operation of the gear mechanism to the front wheels, It consists of a link mechanism consisting of a pitman arm, a drag arm, a knuckle arm and a tie rod for proper support.

In addition, the steering column is provided with a shock absorber to reduce the injury of the driver by appropriately absorbing the impact when the upper body of the driver hits the steering wheel during the collision of the car, that is, the upper portion as shown in FIG. The front end of the lower column 102 is press-fitted and fastened to the lower end of the column 101, and the upper steering shaft 103 and the lower steering shaft 104 are inserted into the upper column and the lower column, respectively, to mediate the bearing 105. While being spaced apart from each other via the tube 106 is connected to each other.

Accordingly, when a collision accident occurs while driving the vehicle and the upper body of the driver hits the steering wheel, when the impact is more than a predetermined size, the upper column and the lower column are collapsed to adequately cushion the impact.

However, the conventional shock absorber has a drawback that it is insufficient to protect the driver more safely by absorbing the shock only by the friction force generated between the upper column and the lower column.

Accordingly, the present invention has been made in view of the above circumstances, when the upper body of the driver hits the steering wheel due to a collision or collision accident while driving the vehicle, the collision is sensed by lowering the steering column by hitting the steering wheel. It is an object of the present invention to provide a steering column lowering device in a collision to slow down the speed and reduce the amount of impact so as to effectively reduce a driver's injury.

1 is a schematic cross-sectional view of a steering column according to the prior art,

2 is a schematic perspective view of a steering column before the lowering device is operated in a collision according to the present invention;

3 is a schematic perspective view of a steering column in a state where the lowering device is operated in a collision according to the present invention.

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

1: steering wheel 2: upper steering column

3: Guide Pipe 4: First Extension Shaft

5: first gear 6: second gear

7: 2nd extension axis 8: spring

9: Universal Joint 10: Third Extension Axis

11: 4th extension axis 12: 5th extension axis

13: 3rd Gear 14: 4th Gear

15: 6th extension shaft 16: Steering gear box

17: engaging hole 18: stopper

19: Spring

The present invention for achieving the above object, the guide pipe coupled to the lower end of the upper steering column to which the steering wheel is fastened, coupled to the lower end protruding out of the guide pipe and the first gear at the free end thereof. A first extension shaft equipped with a second extension shaft supported by a spring having a second gear meshed with the first gear, a third extension shaft connected via the second extension shaft and a universal joint, and A fourth extension shaft splined to the distal end of the three extension shafts, a fourth extension shaft fitted to the fourth extension shaft and splined to the free end, and a fifth extension shaft equipped with a third gear at the free end, and a fourth gear engaged with the third gear, It has a sixth extension shaft connected to the steering gear.

And the lower end is equipped with a stopper fitted to the engaging groove formed in the guide pipe to prevent the upper steering column is lowered back to the driver by the restoring force of the spring after the lowering.

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

2 is a schematic perspective view of a steering column before the lowering device is operated in a collision according to the present invention, that is, the lower end of the upper steering column 2 to which the steering wheel 1 is fastened moves in the guide pipe 3. The first gear 5 is installed at the lower end of the upper steering column so that the first extension shaft 4 protrudes to the outside of the guide pipe, and the first gear 5 is installed at the lower end of the upper steering column. The second extension shaft 7 with the second gear 6 meshed with is supported on the vehicle body via the spring 8.

The third extension shaft 10 is connected to the second extension shaft 8 via the universal joint 9, and the distal end portion of the third extension shaft is inserted into the fourth extension shaft 11 to be spline-coupled thereto. The fifth extension shaft 12 is fitted to the opposite side of the fourth extension shaft, and the third gear 13 is attached to the free end thereof while competing with the spline.

In addition, the sixth extension shaft 15 having the fourth gear 14 engaged with the third gear is connected to a steering gear installed in the steering gear box 16, and the spring 8 after the upper steering column is lowered. The stopper 18 caught in the locking groove is supported by the spring 19 at the lower end of the upper steering column while the locking groove 17 is formed in the guide pipe so as to prevent the lift from rising back toward the driver. It is installed rotatably.

Accordingly, the steering force of the steering wheel is transmitted to the second extension shaft through the first and second gears through the first extension shaft, and the rotational movement of the second extension shaft is transmitted through the third extension shaft through the third extension shaft. The roll is transmitted, and the movement of the third gear is transmitted to the steering gear via the fourth gear and the sixth extension shaft to steer.

When the driver's upper body hits the steering wheel in the above state and the shock is transmitted to the upper steering column, the upper steering column is moved along the guide pipe, thereby absorbing the shock through the spring 8 and mitigating it. It will alleviate the driver's injury.

After the upper steering column is lowered, the stopper is caught in the locking groove to prevent the upper steering column from being raised toward the driver, thereby preventing the driver from being impacted by the upper steering column.

As described above, the steering column lowering device in a collision according to the present invention has the advantage of effectively alleviating the driver's injury by alleviating the impact that the driver receives while the upper steering column is lowered during the collision of the vehicle.

Claims (2)

A guide pipe coupled to the lower end of the upper steering column to which the steering wheel is fastened and coupled to the lower end of the steering wheel, the first extension shaft having the first gear mounted thereon at the free end thereof and engaged with the first gear. A second extension shaft supported by a spring with a second gear, a third extension shaft connected via the second extension shaft and a universal joint, a fourth extension shaft spline-coupled with the distal end of the third extension shaft, A collision with a sixth extension shaft connected to a steering gear with a fifth extension shaft fitted with a third gear and a fourth gear engaged with the third gear at the free end while being splined to the fourth extension shaft. Steering column lowering device. The stopper of claim 1, wherein the upper steering column has a stopper fitted to a locking groove formed in the guide pipe to prevent the upper steering column from being lowered back to the driver by the restoring force of the spring after the upper steering column is lowered. Steering column lowering device in collision.