KR100795081B1 - Shock 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, the object of which is to provide a steering column as a tube and the outer peripheral end coupled to the lower bracket is processed to be cut in the axial direction during shock transmission, quality control And it is to provide a shock absorbing device of the steering column for a vehicle that is easy to manufacture and assembly and reduce the manufacturing cost, the steering column 10 is provided with a tube so as to be able to contract in the axial direction during the external shock transmission, and the steering column 10 Lower bracket 20 having a coupling hole 21 formed therein so that one end side thereof can be inserted, and recessed toward the center at one side outer periphery of the steering column 10 inserted into the coupling hole 21. A plurality of recesses 11 formed in the axial direction and one of the recesses 11 adjacent to the coupling hole 21 to be in close contact with the outer circumferential side of the coupling hole 21. It is the structure provided with the bending part 12 which bent and cut | disconnected the side front end.

Lower Bracket, One Piece Tube, Recess, Bending, Breaking Force

Description

Shock Absorber of Vehicle Steering Column {SHOCK ABSORBING DEVICE OF STEERING COLUMN FOR VEHICLE}

1 is a perspective view showing a conventional steering column.

2 is a perspective view showing a steering column according to the present invention.

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

<Explanation of symbols for main parts of drawing>

10: steering column 11: depression

12: Bend 20: Lower Bracket

21: joiner

The present invention relates to a shock absorbing device of a steering column for a vehicle, and more particularly, an impact of a steering column for a vehicle provided with a single tube so that a portion of an outer circumference of one end side is cut in the axial direction during shock transmission to absorb a shock. It relates to an absorber.

In general, a steering system for a vehicle includes a steering shaft connected to a lower part of a steering wheel, a gear box installed to be throttled at the lower end of the steering shaft, and a steering column installed at an outer side thereof to fix the steering shaft to the vehicle body. It is provided with.

On the other hand, the steering shaft is provided with a variety of structures to be able to contract in the axial direction during the external shock transmission, the steering column is also provided to be able to contract in the axial direction with the outer side.

At this time, the steering column is assembled by inserting the tube formed to be separated up and down each other, deform the cross section of the coupling portion to maintain the assembled state, or use a separate member therebetween.

As a result, the steering column is normally assembled and the external shock is axially contracted when the external shock is transmitted, thereby dampening the driver's injuries due to the impact when the driver and the steering wheel are in close contact with each other. , The driver's safety.

1 is a cross-sectional view showing such a conventional steering column. As shown therein, the steering column 1 is provided with two tubes to absorb shocks, and an outer tube 2 installed at one side is disposed at the steering wheel side of the vehicle and installed at the other side. The inner tube 3 is disposed on the gearbox side, and is provided with a smaller diameter than the outer tube 2 so that a part of the inner tube 3 is inserted into the outer tube 2.

On the other hand, the outside of the steering column (1) is installed two brackets on the upper and lower sides to fix it to the vehicle body, the outer bracket is installed on the outside of the outer tube (2), the inner tube is installed, Outside the (3), the lower bracket 4 is provided.

At this time, the outer periphery of the outer tube (2) is provided with a fixing structure provided to maintain the assembled state with the inner tube (3), this fixing structure is a ball bushing type (Ball Bush Type) and stacking type (Stacking Type) Although there are several, a fixing structure of Curling Type is applied in FIG.

That is, this curry type fixing structure provides a plurality of curry portions 5 which partially cut the outer side of the outer tube 2 provided in the hollow and bend them inward, and thus the curry portion 5 bent In close contact with the outer circumferential surface of the inner tube 3 inserted into the outer tube 2, the outer tube 2 and the inner tube 3 are normally maintained in an assembled state.

In addition, when the impact load transmitted to the steering column 1 is greater than the frictional force by the curling portion 5, the outer tube 2 and the inner tube 3 are contracted in the axial direction to absorb the external impact force, Will be protected.

However, such a conventional shock absorbing device for a steering column for a vehicle includes a diameter and a thickness of the outer tube and the inner tube, and the size of the cured portion to adjust the resistive load between the outer tube and the inner tube according to the impact load transmitted from the outside. Since it is necessary to adjust the thickness and the like, there was a problem that the load management is difficult.

In addition, by providing a steering column with two tubes in order to absorb the shock, the production and assembly of the tube is inconvenient, and there is a problem that the manufacturing cost is increased.

The present invention is to solve such a conventional problem, an object of the present invention is to provide a steering column as one tube and to be processed to be cut in the axial direction during shock transmission on one side outer circumference coupled with the lower bracket, It is to provide a shock absorbing device of a steering column for a vehicle that is easy to control quality, manufacture and assembly, and reduce manufacturing cost.

The impact absorbing device of the vehicle steering column of the present invention for achieving the above object, the steering column provided with a tube so as to be able to contract in the axial direction during external shock transmission, and coupled to the inside so that one end side of the steering column can be inserted. A shock absorbing device for a vehicle steering column having a lower bracket having a ball, comprising: a plurality of depressions formed in an axial direction while being recessed in a center side at one outer periphery of the steering column inserted into the coupling hole; It is characterized in that the bent portion formed by bending by cutting the one end of the depression adjacent to the coupling hole to be in close contact with the outer peripheral side of the coupling hole.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the shock absorbing device of the vehicle steering column according to the present invention.

2 is a perspective view showing a steering column according to the present invention. As shown therein, the steering column 10 is provided with a hollow tube and a steering shaft (not shown) is installed therein.

In addition, a lower bracket 20 is provided at one end of the outer circumferential side of the steering column 10, and an upper bracket is provided at the other end side, which is not shown, and the steering column 10 includes a steering shaft installed therein. It is fixed to the vehicle body to be rotatable.

At this time, one end of the lower bracket 20 is fixed to the vehicle body, and a hollow coupling hole 21 is formed in the axial direction so as to wrap the steering column 10 therein.

On the other hand, the steering column 10 is provided to be able to contract in the axial direction during the external shock transmission, and has a shock absorbing device, the steering column 10 of the present invention is provided with one tube, one end side A shock absorber is provided.

That is, the shock absorbing device of the present invention is provided between the steering column 10 and the lower bracket 20 supporting one end thereof, and the outside of one end side of the steering column 10 inserted into the coupling hole 21. Indented to the center side at the periphery, but formed in the axial direction elongated, and bent by cutting the one end of the recessed portion 11 adjacent to the coupling hole 21 to be in close contact with the outer peripheral side of the coupling hole 21 It is provided with a bent portion (12).

At this time, the depression 11 is pressurized to the outer periphery of the tube with a press or the like to be cut and dried along the recessed portion when the axial movement of the steering column 10 due to the external shock transmission, as shown in FIG. By forming it in a substantially rectangular shape, it is weak compared with other parts, and four are provided in the position which is symmetrical with each other.

In addition, the bent part 12 is formed by bending the tip end side after forming the recessed part 11, four are formed in a position symmetrical with each other, provided to face the outer peripheral side of the coupling hole 21 In order to fix more firmly, the outer peripheral side of the coupling hole 21 is welded or the like.

Thus, in the present invention, since the shock absorbing device is provided at one end of the steering column 10 so as to be able to contract in the axial direction, one piece tube is easier to manufacture and install than a conventional two piece tube. ) Can be used, and even if the steering column 10 is provided with one tube, sufficient shock absorbing power can be obtained.

In addition, by controlling the size, depth and number of the depression 11, it is possible to facilitate the management of the resistance load between the outer tube and the inner tube according to the impact load transmitted from the outside.

In the shock absorbing device of the steering column for a vehicle of the present invention configured as described above, the depression 11 and the bent portion 12 are formed on one side of the steering column 10 provided with one tube, and the depression 11 and the bending portion are formed. The side 12 is installed in the lower bracket 20.

At this time, the tip that is cut to form the bent portion 12 of the depression 11 is inserted into the coupling hole 21 of the lower bracket 20, the bent portion 12 is facing the outer side of the coupling hole 21 Are fixedly coupled.

Thus, in the shock absorbing device of the steering column for a vehicle of the present invention, when the external impact load is transmitted to the steering column 10, the steering column 10 is moved, thereby moving to the outer peripheral side of the coupling hole 21. Receiving portion 11 is supported by the fixed bent portion 12 is both sides are cut in the axial direction is dried.

At this time, since the depression 11 is press-formed by a press or the like, its cross-sectional area is changed, and since the changed cross-sectional area is weakly formed compared to other portions, a breaking force is generated here, and this breaking force is the entire depression 11. It acts uniformly to achieve a constant shock absorption.

As described above in detail, the shock absorbing device of the steering column for a vehicle according to the present invention manages the resistive load between the outer tube and the inner tube according to the impact load transmitted from the outside by adjusting the depression so that the load management is easy and the constant wave There is an advantage that can achieve a uniform shock absorption by the depression having a single force.

In addition, since the depression and the bent portion can achieve sufficient shock absorption, and having a steering column with one tube, the manufacturing and installation process of the steering column is facilitated, and the manufacturing cost of the steering column is due to the simple structure and simple process. There is an advantage to reduce the cost.

Claims (4)

In the shock absorbing device of the steering column for a vehicle having a steering column provided with a tube so as to be able to contract in the axial direction during the external shock transmission, and a lower bracket having a coupling hole formed therein so that one end side of the steering column can be inserted, A plurality of recesses 11 recessed toward the center of the one end side outer circumference of the steering column 10 inserted into the coupling hole 21 and extending in the axial direction, and the outer circumferential side of the coupling hole 21. The shock absorbing device of the steering column for a vehicle, characterized in that the bent part 12 is formed by cutting the one end of the recess 11 adjacent to the coupling hole 21 to be in close contact with the coupling hole (21). The method of claim 1, The steering column 10 is a shock absorbing device of a vehicle steering column, characterized in that provided in one tube. The method of claim 1, The bent part 12 is a shock absorbing device of the steering column for a vehicle, characterized in that fixedly coupled to the outer peripheral side of the coupling hole (21). The method of claim 1, The depression 11 is the impact of the steering column for the vehicle, characterized in that formed by pressing the outer periphery of the tube to be cut and dried along the recessed portion when the axial movement of the steering column 10 due to the external shock transmission. Absorber.

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