KR20000007418U - Shock Absorbing Steering Column - Google Patents

Abstract

The present invention relates to a shock absorbing steering column, and more particularly, by absorbing the shock applied to the steering column by using the damping effect generated when the fluid passes through the orifice, thereby minimizing the amount of shock absorption at the design stage of the product. The present invention relates to a shock absorbing steering column that can adjust, simplify manufacturing equipment, and reduce manufacturing costs.

Shock absorbing steering column according to the present invention for this purpose, the hollow outer column is installed in the column mounting portion of the vehicle body by the upper bracket; A hollow inner column having a portion of an upper end inserted into the outer column and installed in the column mounting part by a lower bracket; A lower shaft having one end closed and installed in the inner column, the lower shaft being filled with hydraulic oil; A partition member having one end formed into a closed hollow and installed in the outer column such that a portion of the lower end is inserted into the lower shaft, and having a orifice therein for generating a damping effect upon passage of the hydraulic oil. An upper shaft provided with; And a seal member installed at a coupling portion of the lower shaft and the upper shaft to prevent leakage of the hydraulic oil.

According to the shock absorbing steering column according to the present invention configured as described above, by adjusting the quantity and diameter of the orifice in the design stage of the product, it is possible to finely adjust the amount of shock absorbing, and to separate Eliminating the need for parts can simplify manufacturing equipment and reduce manufacturing costs.

Description

Shock Absorbing Steering Column

The present invention relates to a shock absorbing steering column, and more particularly, by absorbing the shock applied to the steering column by using the damping effect generated when the fluid passes through the orifice, thereby minimizing the amount of shock absorption at the design stage of the product. The present invention relates to a shock absorbing steering column that can adjust, simplify manufacturing equipment, and reduce manufacturing costs.

In general, a steering device of a vehicle is a device for arbitrarily changing the driving direction of a vehicle, and the steering wheel, the steering shaft, and the column are configured by the driver to directly steer and transmit the driving force to the gear mechanism and the link mechanism. The gear mechanism fixed to the frame and the gear mechanism fixed to the frame as a part for increasing the operating force by reducing the rotation of the operating mechanism and the steering shaft and changing the direction of movement of the operating mechanism to the link mechanism, and transmitting the movement of the gear mechanism to the front wheel, As a part which correctly maintains the relation position of a wheel, it consists of a link mechanism comprised of a pitman arm, a drag link, a knuckle arm, a tie rod, etc.

In addition, the operation mechanism is adopted to prevent the operation mechanism from protruding toward the driver and causing harm to the driver while the vehicle body is damaged in the event of a collision accident, and to reduce the impact when the driver hits the operation mechanism inertia.

Figure 1 shows a partial cross-sectional view showing the configuration of a shock absorbing steering column according to the prior art.

The upper bracket 1 and the lower bracket 2 are installed in the column mounting portion 10 of the vehicle body, and the outer column 3 is installed inside the upper bracket 1, and the lower bracket 2 Inner column 4 is provided inside the inner side), and the upper part of the inner column 4 is press-fitted to the lower end of the outer column 3 by the press-fit fixing member 5.

An upper shaft 6 is provided inside the outer column 3, a lower shaft 7 is provided inside the inner column 4, and a lower end of the upper shaft 6 is provided with a molding member 8. The inner bracket 7 is fixed to the inner side of the lower shaft 7, and the upper bracket 1 and the outer column 3 are connected by a metal plate 9.

The shock absorbing action of the steering column configured as described above is as follows.

When the driver's body hits the steering wheel during the collision of the vehicle, the inner column 4 is press-fitted into the outer column 3 to primarily perform shock absorption, and the upper shaft 6 and the lower shaft ( After the molding member 8 fixing 7) is broken and the shock absorbing action is performed secondarily, the metal plate 9 connected between the upper bracket 1 and the outer column 3 is stretched and the shock absorption is thirdly absorbed. Work is done.

However, the conventional shock absorbing steering column configured as described above has three different kinds of energy absorbing members (press-fit fixing member, molding member, metal plate) and the energy absorbing member in order to be able to absorb the shock applied to the steering column. There is a problem in that the installation process is required to install the manufacturing cost is increased, the deviation of the energy absorption according to the manufacturing process or the deviation of the member can not be controlled.

The present invention is to solve the above problems, by absorbing the shock applied to the steering column by using the damping effect generated when the fluid passes through the orifice, it is possible to finely control the amount of shock absorption at the design stage of the product, It is an object of the present invention to provide a shock absorbing steering column which can simplify manufacturing facilities and reduce manufacturing costs.

1 is a partial cross-sectional view showing the configuration of a shock absorbing steering column according to the prior art.

2 is a partial cross-sectional view showing the configuration of a shock absorbing steering column according to the present invention.

3 is an enlarged view illustrating main parts of FIG. 2;

<Explanation of symbols for main parts of drawing>

11: upper bracket 12: lower bracket

13: outer column 14: inner column

15: seal member 16: upper shaft

16a, 16b, 16c: bulkhead 16a ', 16b', 16c ': orifice

16d: Partition 17: Lower Shaft

Shock absorbing steering column according to the present invention for achieving the above object, the hollow outer column is installed in the column mounting portion of the vehicle body by the upper bracket; A hollow inner column having a portion of an upper end inserted into the outer column and installed in the column mounting part by a lower bracket; A lower shaft having one end closed and installed in the inner column, the lower shaft being filled with hydraulic oil; A partition member having one end formed into a closed hollow and installed in the outer column such that a portion of the lower end is inserted into the lower shaft, and having a orifice therein for generating a damping effect upon passage of the hydraulic oil. An upper shaft provided with; And a seal member installed at a coupling portion of the lower shaft and the upper shaft to prevent leakage of the hydraulic oil.

Hereinafter, a preferred embodiment of the shock absorbing steering column according to the present invention with reference to the accompanying drawings in detail as follows.

Figure 2 shows a partial cross-sectional view showing the configuration of the shock absorbing steering column according to the present invention, Figure 3 shows an enlarged view of the main portion of FIG.

As shown in the figure, an upper shaft 16 is provided inside the outer column 13 installed in the column mounting portion 10 by the upper bracket 11, and the upper part of the inner column 14 has an outer column. It is installed in the column mounting part 10 by the lower bracket 12 so that it may be inserted in the inside of (13), The lower shaft 17 is provided in the inner column 14, and the upper shaft 16 The lower portion is inserted into the upper portion of the lower shaft 17 via the seal member 15.

The upper shaft 16 is provided with first to third partition members 16a, 16b, and 16c spaced apart from each other by the same interval, and each of the partition members 16a, 16b, and 16c is provided at each of the partition members 16a, 16b, and 16c. Orifices 16a ', 16b', and 16c 'are provided, and partitions 16d are provided to be spaced apart from the third partition member 16c by a predetermined distance, and hydraulic hydraulic fluid is provided inside the lower shaft 17. Is filled.

Accordingly, the space between the first and second partition members 16a and 16b serves as the first fluid chamber CH1, and the space between the second and third partition members 16b and 16c is the second fluid. It acts as the chamber CH2, and the space between the third partition member 16c and the partition 16d acts as the third fluid chamber CH3.

Here, the diameters of each of the first to third axial orifices 16a ', 16b', and 16c 'are set as in the following formula (1).

R1> R2> R3 ------------------------ (1)

R1: diameter of the first orifice

R2: diameter of the second orifice

R3: diameter of the third orifice

In general, since the force applied to the hydraulic fluid is inversely proportional to the square of the diameter of the orifice, when the diameters of the first to third orifices are set as in Equation (1), the hydraulic fluid filled in the lower shaft 17 is filled. The force applied to the hydraulic fluid is sequentially increased when the hydraulic oil passes through the first to third orifices 16a ', 16b', and 16c '.

Therefore, the shock applied to the steering column can be effectively absorbed.

Hereinafter, the operation and effects of the present invention will be described.

When the body of the driver hits the steering wheel during the collision of the vehicle, the upper shaft 16 is pushed into the lower shaft 17. The hydraulic oil filled in the lower shaft 17 is first Passing through the orifice (16a ') is introduced into the first fluid chamber (CH1), a predetermined damping effect is generated and the shock absorbing action is primarily performed.

When the hydraulic fluid is filled in the first fluid chamber CH1, the hydraulic fluid flows through the second orifice 16b ′ and flows into the second fluid chamber CH2. After the hydraulic oil is filled in the second fluid chamber CH2, the hydraulic fluid flows through the third orifice 16c ′ and flows into the third fluid chamber CH3. do.

As described above, according to the shock absorbing steering column according to the present invention, by controlling the quantity and diameter of the orifice in the design stage of the product, it is possible to finely adjust the amount of shock absorbing, and to separate the energy absorbing member of the conventional various forms. This eliminates the need for parts to simplify manufacturing equipment and reduce manufacturing costs.

Claims (3)

A hollow outer column installed on the column mounting portion of the vehicle body by an upper bracket; A hollow inner column having a portion of an upper end inserted into the outer column and installed in the column mounting part by a lower bracket; A lower shaft having one end closed and installed in the inner column, the lower shaft being filled with hydraulic oil; A partition member having one end formed into a closed hollow and installed in the outer column such that a portion of the lower end is inserted into the lower shaft, and having a orifice therein for generating a damping effect upon passage of the hydraulic oil. An upper shaft provided with; A seal member installed at a coupling portion of the lower shaft and the upper shaft to prevent leakage of the hydraulic oil; Shock absorbing steering column, characterized in that comprises a. The shock absorbing steering column according to claim 1, wherein a plurality of partition members each having an orifice are spaced apart at equal intervals in the upper shaft. 3. The shock absorbing steering column of claim 2, wherein a diameter of each orifice of the partition member gradually decreases toward an upper portion of the upper shaft.