KR100569462B1 - Impact Absorbing Device of Steering Column for Vehicle - Google Patents

Abstract

The present invention relates to a shock absorbing device of a steering column for a vehicle, wherein a steering wheel (3) is mounted at an upper shaft, a lower shaft is installed at a lower shaft, and the lower shaft (7) has a universal connection provided with bellows and splines. In the steering column for a vehicle of the type, the upper shaft (1) and the lower shaft (7) is universally connected via a fastening pin withdrawing means, the lower shaft (7) is provided with a yoke pull means, The upper pin 1 and the lower shaft 7 are disconnected by operating the fastening pin drawing means through the applied external impact energy, and at the same time, the lower shaft 7 is connected to the upper shaft 1 via the yoke pulling means. It is configured to secure enough depression distance by preventing interference, and minimizes the driver's chest compression caused by the steering wheel in the event of a collision. It has the effect of phase.

Description

Impact Absorbing Device of Steering Column for Vehicle             

1 is a state of use of the steering column to which the present invention is applied,

2 is a partial perspective view of the winding member in FIG.

Figure 3 is a schematic perspective view for explaining the connection state of the fastening pin withdrawing means and yoke and cross in Figure 1,

4 is a partial cross-sectional view of the yoke pulling means in FIG.

5 is a perspective view for explaining a state in which the steering column is applied to the present invention is depressed,

Figure 6 is a partial perspective view for explaining the principle of detachment of the fastening pin in Figure 5,

7 is a state of use of the steering column according to the conventional use example,

<Description of Symbols for Main Parts of Drawings>

1-Upper Shaft 3-Steering Wheel

5-1st yoke 7-Lower shaft

9-2nd York 11-Curling Plate

13-Part 15-Pinout Hole

17-Winding member 19-Bar

21-fastening pin 23-withdrawal wire

25-receiving member 27-tension spring

29-Steering Column 31-Engine Room

The present invention relates to a shock absorbing device for a steering column for a vehicle, and more particularly, to a shock absorbing device for a steering column for a vehicle to minimize the chest pressure applied to the driver by inducing to be depressed by the impact energy during the vehicle crash.

The steering device installed in the vehicle is for changing the direction of the vehicle according to the driver's will, and includes a steering column connected to the steering wheel, a steering shaft coupled to the steering wheel, and a gear box installed at the bottom of the steering column. Doing.

On the other hand, when an impact is applied to the front of the vehicle, the upper body of the driver who is momentarily directed toward the front of the vehicle by the driving inertia hits the steering wheel, or the steering shaft is pushed toward the driver's seat to inflict a blow on the driver. The impact energy absorbing means is provided on the steering shaft and the steering column to prevent the driver from being fatally damaged by the steering wheel by being deformed axially in response to external impact energy.

7 shows a steering column according to a conventional use, as shown therein, the steering wheel 52 is connected to the upper end of the upper shaft 50 and the lower shaft 54 to the lower end of the upper shaft 50. ) Is connected by the universal joint 56, the lower end of the lower shaft 54 is mechanically connected to the gearbox (not shown).

In addition, a mounting bracket (not shown) in close contact with the vehicle body is installed on the upper shaft 50. The mounting bracket is installed via a capsule 60 to be separated from the vehicle body during external shock transfer, while a universal joint is installed. A mounting plate 64 for attaching the steering column 62 to the vehicle body is provided at a position adjacent to the 56, and a curling plate 66 is attached to the mounting plate 64, and the lower shaft 54 is provided. The bellows 68 and the spline 70 is provided.

In the conventional steering column 62 configured as described above, when the collision energy is transmitted, the spline 70 is axially moved to absorb the displacement due to the impact compression, and then the bellows 68 is bent to steer the steering column 62. The space is secured, and at the same time the capsule 60 is destroyed, the mounting bracket is deformed to absorb a part of the shock, and the continuous shock decompresses the curling plate 64 while compressing the upper shaft 50 so that the steering shaft In addition to preventing the protruding into the vehicle, the steering wheel 52 is minimized to hit the driver's body.

However, since the bellows is bent first by the impact force when the impact energy is transmitted to the vehicle body, the shock absorbing structure as described above has a problem in exerting the initial shock absorbing ability, that is, the steering after the bellows is deformed by the impact force. Since the column cannot be recessed, there is a problem that it is difficult to effectively prevent the injury of the driver.

On the other hand, this problem can be solved to some extent if the length of the bellows can be solved, but there is a design limitation because the space according to the assembly to ensure that the spline is axially moved when the impact.

Accordingly, the present invention is to solve the above problems, the impact absorption of the steering column for the vehicle to minimize the chest compression applied to the driver by depressing the steering shaft while the connection portion of the universal joint is separated by the impact force transmitted to the vehicle body The object is to provide a device.

In order to achieve the above object, the present invention provides a shock absorbing device for a steering column, wherein a steering wheel is mounted on an upper shaft, a lower shaft is installed on a lower shaft, and a bellows and a spline are provided on the lower shaft. In the steering column for a vehicle, the upper shaft and the lower shaft are universally connected via a fastening pin withdrawing means, the lower shaft is provided with a yoke pulling means, the fastening pin via the external impact energy applied to the engine room By releasing the operation means for releasing the connection between the upper shaft and the lower shaft, characterized in that configured to ensure a sufficient depression distance by preventing the lower shaft from interfering with the upper shaft through the yoke pull means.

In addition, the present invention is a fastening pin withdrawal means, the outer peripheral surface having a recess and a pair of pin take-out hole provided on the first yoke, the bar connected to the engine room, and one end is fixed to the bar The other end is divided into two strands, each having a drawing wire connected to the fastening pin, while the yoke pulling means is provided with a receiving member connected to the lower shaft, and a tension spring built into the receiving member and one side connected to the second yoke. Characterized in that provided.

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

1 is a diagram illustrating a state of use of a steering column to which the present invention is applied. As shown in the drawing, the first yoke 5 is mounted on a lower end of a steering wheel 3 at an upper end of an upper shaft 1. ) And the second yoke 9 installed at the upper end of the lower shaft 7 are connected to the universal joint via the fastening pin withdrawing means, and the lower end of the lower shaft 7 is a gearbox (not shown). On the other hand, the capsule (not shown) is installed on one side of the upper shaft 1, the curling plate 11 is attached to a position adjacent to the universal joint, the lower shaft (7) The yoke pulling means is provided.

As shown in FIGS. 2 and 3, the fastening pin extracting means includes a pair of pin-out holes 15 at a position facing the recess 13 along an outer circumferential surface of the first yoke ( 5) a cylindrical wire wound member 17 installed on the bar 19, and a bar 19 connected to the engine room, and one end is fixed to the bar 19, and the other end is divided into two strands. 15, the lead wires 23 connected to the fastening pins 21 are provided.

On the other hand, in the case of the winding member 17 in the embodiment of the present invention is an example of a cylindrical shape, but is not limited to this, if it is configured to withdraw the fastening pin 21 through the pin withdrawal hole 15 of any form. It is okay.

In addition, the take-out wire 23 has a length enough to be wound around the winding member 17 in the steering rotation range when the steering wheel 3 is in the neutral position, in the embodiment according to the present invention The installation interval between the pins 21 is 4 cm and less than 12 cm per one turn of the steering wheel 3, and is wound on the recess 13 to prevent incorrect winding during operation of the steering wheel 3. do.

Meanwhile, as shown in FIG. 4, the yoke pulling means includes a receiving member 25 connected to the lower shaft 7 and a tension spring built in the receiving member 25 and connected to one side of the second yoke 9. Bar (27), the receiving member 25 is formed in the form of a quadrilateral bar of the cavity and the second yoke (9) is inserted into the inner surface so that the slide movement, the tension spring 27 when the universal joint state is released It is configured to teleport the second yoke 9 into the receiving member 25 by the tensile force of.

Next, the operation of the shock absorbing device of the present invention steering column 29 having the structure as described above will be briefly described.

When an external pressure is applied to the vehicle, as shown in FIG. 5, when the engine compartment 31 is pushed toward the vehicle compartment, the withdrawal wire 23 pulls the fastening pins 21 so that the first yoke 5 and the second yoke 9 ), The upper shaft 1 and the lower shaft 7 are separated. At this time, the second yoke 9 is momentarily pulled by the tension force of the tension spring 27 to move into the receiving member 25. Since the second yoke 9 prevents interference with the first yoke 5, the axial support force of the upper shaft 1 and the lower shaft 7 is broken and the steering column 29 is recessed.

That is, when an external force applied to the driver is injured, the intrusion amount of the engine room 31 is relatively larger than the length of the extra drawing wire 23 which is wound around the winding member 17 and the bar 19 is in the vehicle direction. The pulling wire 23 is pulled while moving to, and accordingly, the tension of the drawing wire 23 is transferred in the direction of the arrow as shown in FIG. 6, so that the fastening pin from the yoke fastening portion is connected through the pin drawing hole 15. By deviating 21, the axial support force of the steering column 29 is released to secure a distance that can be sufficiently recessed.

As the steering column 29 is recessed as described above, the axial force between the first yoke 5 and the second yoke 9 held by the fastening pin 21 is released so that the second yoke 9 is free. The steering column 29 can be easily recessed by moving the tension spring 27 into the receiving member 25 to prevent interference with the first yoke 5.

On the other hand, in the case of low-speed collision, the impact absorbing device may not operate because the amount of the engine room is not large, but in this case, the steering column 29 is intentionally intentional because the driver is not likely to be injured through the steering column. There is no problem in implementing the shock absorbing device according to the present invention because there is no need to dent.

As described above, the shock absorbing device of the steering column for a vehicle according to the present invention, the driver's thorax caused by the steering wheel by inducing the steering shaft to sink while the connection portion of the universal joint is separated by the impact force transmitted to the engine room when the vehicle collision Minimizing the pressure has the effect of improving the safety of the vehicle.

Claims (5)

The steering wheel 3 is mounted on the upper end of the upper shaft 1, the lower shaft 7 is installed on the lower end, and the lower shaft 7 is provided with a bellows and a spline in a universal connection type vehicle steering column. , The upper shaft 1 and the lower shaft 7 include a wire winding member 17 provided on the first yoke 5 having a recess 13 and a pair of pin-out holes 15 on an outer circumferential surface thereof. , A bar 19 connected to the engine room, and one end fixed to the bar 19 and the other end divided into two strands, each of which includes a fastening pin 23 having a lead wire 23 connected to the fastening pin 21. Universal connection via the withdrawal means; The lower shaft 7 has a yoke pull provided with a receiving member 25 connected to the lower shaft 7, and a tension spring 27 installed on the receiving member 25 and having one side connected to the second yoke 9. Means are provided; By operating the fastening pin withdrawing means through the external impact energy applied to the engine room to release the connection state of the upper shaft (1) and the lower shaft (7), at the same time the lower shaft via the yoke pull means A shock absorbing device for a vehicle steering column configured to secure a sufficient depression distance by preventing the (7) from interfering with the upper shaft (1). delete delete 2. The shock absorbing device of claim 1, wherein the accommodating member has a hollow quadrangular bar shape. The method of claim 1, wherein when the universal member of the upper shaft (1) and the lower shaft (7) is released, the receiving member (25) moves the second yoke (9) into the receiving member (25). Shock absorbing device of the steering column for a vehicle, characterized in that configured to.

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