KR101190734B1 - Steering column with tilt and telescopic apparatus mixed for vehicle - Google Patents

Abstract

The present invention relates to a vehicle tilt and telescopic hybrid steering column, and more particularly, to improve the tilt and telescopic holding force of the prior art, and to improve the merchandise compared to the tilt stinging column, the vehicle tilt and telescopic hybrid Relates to the steering column.

To this end, the present invention and the plastic bushing is inserted into the outer tube length adjustment means capable of adjusting the length in the axial direction; An upper shaft inserted into the outer tube and having an upper end attached to the upper inner circumferential surface of the outer tube by a ball bearing; Fastening means seated on the outer tube to lock and unlock the outer tube and the plastic bushing; Tilt brackets surrounding one side of the outer tube and both sides of the tightening means, the inclined slots formed on both sides; And a tilt bolt penetrating the length adjusting means, the tightening means, and the inclined slot.

Steering column, outer tube, incision groove, distance bracket, lower tube, tilt bracket

Description

Steering column with tilt and telescopic apparatus mixed for vehicle

1 is a bottom perspective view showing a steering column according to the present invention,

2 is a perspective view showing an outer tube according to the present invention;

3 is a perspective view showing a tilt bracket according to the present invention,

4 is a perspective view showing a distance bracket according to the present invention;

5 is a perspective view showing a plastic bush according to the present invention,

6a to 6h are images showing the assembly sequence of the steering column according to the present invention,

7a to 7c are images showing the operating state of the steering column according to the present invention,

8 is a side view showing a conventional tilt steering column,

9A and 9B are cross-sectional views illustrating an adjustment position of a steering wheel in the case of a conventional tilt and telescopic vehicle.

FIG. 10 is a cross-sectional view for explaining a vertical component and a horizontal component of a passenger's moving direction in a collision in the case of a conventional tilt and telescopic vehicle. FIG.

<Description of the symbols for the main parts of the drawings>

10: steering column 11: outer tube

12: incision groove 13: the first distance bracket

14: second distance bracket 15: long hole

16: lower tube 17: plastic bushing

18: protrusion piece 18a: through hole

19: tilt bolt 20: upper shaft

21: ball bearing 22: serration

23: tilt bracket 23a: coupling piece

23b: inclined slot 24: tilt lever

25: Tilt Cam 26: MDPS Input Shaft

27: capsule 28: steering wheel

The present invention relates to a vehicle tilt and telescopic hybrid steering column, and more particularly, to improve the tilt and telescopic holding force of the prior art, and to improve the merchandise compared to the tilt stinging column, the vehicle tilt and telescopic hybrid Relates to the steering column.

In general, the steering device of the vehicle is a device for arbitrarily changing the direction of movement of the vehicle, a steering wheel that the driver can directly hold and operate, a steering shaft rotated in conjunction with the steering wheel, mounted in place of the steering shaft Operation mechanisms including a steering column and the like, including a tilting device and a telescopic device for additional convenience facilities required for driving, and a gear mechanism and a link mechanism are included.

The tilt device is a device for adjusting the installation angle of the steering column according to the physical characteristics of the driver, as shown in Figure 8, to operate the position of the steering wheel up and down around the tilt hinge portion 100 during the tilt operation It is.

However, the seat of the shorter driver is located in front and the position of the tilt is located at the bottom. At this time, the distance from the upper body of the tall driver to the steering wheel is excessively increased to 'A', and the steering wheel from the upper body of the short driver. The distance to is too small with 'B'.

In addition, in the case of the tilt device, the distance is additionally generated by the displacement generated while the steering wheel rotates with respect to the tilt hinge part 100, compared to the distance to the brake pedal.

In order to solve such a problem, a telescopic steering column or an adjustable pedal is applied, but this is disadvantageous in terms of cost and weight.

9A and 9B are cross-sectional views illustrating a vehicle to which a conventional tilt and telescopic device is applied, and a structure capable of adjusting the position of the steering wheel 101 with respect to the entire 'A' portion shown in FIG. 9A, but with a tilt operation only. There are disadvantages in terms of cost and weight over columns.

In addition, the area 'B' shown in FIG. 9B is an unnecessary adjustment area where the visibility of the cluster 102 cannot be secured in view of the fact that the short driver is placed in tilt down and the tall driver is placed in tilt up. to be.

On the other hand, the side view angle of the steering column is usually set to 23 to 28 degrees depending on the layout of the vehicle.

In the case of the lower tilt, the steering wheel is set to adjust the position of the steering wheel within a range of 2 to 2.5 degrees vertically from the side view angle.

As described above, since the side view angle of the steering column is 23 to 28 degrees, as shown in FIG. 10, the vertical F _a and the horizontal (F _a ) relative to the behavior F of the passenger moving substantially parallel to the longitudinal direction of the vehicle ( F _b ) If the vertical component (F _a ) exceeds the tilt holding force of the steering column, the steering column does not maintain the tilt position and rises upward, and this phenomenon is not reflected in the structure. This happens in all models.

For this reason, if the tilt is released abruptly, the steering column will stand 2 ~ 2.5 degrees above the initial setting angle (top position of the tilt), which is a major obstacle to the normal operation of the energy absorption function (collabs) of the steering column. Works.

In other words, the collapsing function of the steering column is most effective when the force is applied in the axial direction of the steering column, but as the side view angle increases, the component force in the axial direction F _b of the steering column decreases. have.

In addition, when the tilt is released to the top of the tilt adjustable range, the damage and the amount of chest injury is greatly worsened by the effect similar to the hard contact (hard contact).

As described above, since the tilt holding force of the lower tilt is determined by the friction force between the distance bracket and the tilt bracket, it is advantageous to increase the tilt holding force in terms of collision performance.

However, in order to increase the frictional force, even after the tilt bracket and the distance bracket are in contact, additional force must be applied to increase the frictional force, and thus the operating force of the tilt lever 103 is sharply increased, thereby degrading the productability.

On the other hand, when the total adjustable range of the telescopic steering column is 50mm, the test is conducted at the point of 25mm, which is the intermediate position during the crash law and the commerciality test, so the telescopic bearing capacity improvement is very important.

However, like the tilt holding force, the conventional telescopic bearing force is dependent on the frictional force, and thus has a problem of reaching only 100 to 150 kgf.

The present invention has been made in view of the above, as a cutting groove formed in the outer tube, a projection piece formed in the plastic bush so as to move in the axial direction along the cutting groove, attached to the left and right sides of the cutting groove of the outer tube An inclined slot including a first bracket and a second distance bracket and a tilt bracket coupled to the outside of the first and second distance brackets, the tilt bolt passing through the protrusion and the distance bracket at an angle to the tilt bracket By changing the operating trajectory of the conventional tilt steering column, it can achieve the same level of effect as the telescopic, and the car tilt and telescopic hybrid steering column which can fundamentally prevent pop-up in the event of a collision. The purpose is to provide.

The present invention for achieving the above object in the tilt and telescopic steering column for a vehicle,

A length adjusting means inserted into the outer tube to adjust the length in the axial direction; An upper shaft inserted into the outer tube and having an upper end attached to the upper inner circumferential surface of the outer tube by a ball bearing; Fastening means seated on the outer tube to lock and unlock the outer tube and the plastic bushing; Tilt brackets surrounding one side of the outer tube and both sides of the tightening means, the inclined slots formed on both sides; And a tilt bolt penetrating the length adjusting means, the tightening means, and the inclined slot.

In a preferred embodiment, the length adjusting means includes a cutting groove formed in the axial direction from the lower end to the center of the outer tube; It is formed in the upper end of the plastic bush in the radial direction, characterized in that consisting of a projection piece movable in the axial direction along the cutting groove.

In a more preferred embodiment, the tightening means is attached to the left and right sides of the outer tube with the incision groove therebetween, the first and second distance bracket formed in the side holes on both sides; And a tilt lever and a tilt cam mounted at one end of the tilt bolt, wherein the tilt lever presses the tilt bracket, the first and second distance brackets.

In addition, the upper end of the lower tube is press-fitted to the lower end of the plastic bush, it is fixed in normal, characterized in that the structure that absorbs energy by the frictional force only in the event of a crash.

In addition, the lower inner peripheral surface of the upper shaft is serrated, characterized in that the upper shaft is movable in the axial direction when coupled with the MDPS input shaft.

In addition, the incision is characterized in that formed in the "T" shape.

In addition, the tilt bracket has a top portion is formed in the horizontal direction, the central portion is formed convex protruding wing; A coupling piece formed parallel to the lower surface of the wing in a vertical direction; It characterized in that it comprises a slanted slot formed in an oblique direction to the coupling piece.

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

1 to 6h are views illustrating a structure and an assembly sequence of a steering column according to the present invention.

The present invention is to change the operation trajectory of the tilt in the inclined direction by changing the structure of each component in the tilt device of the conventional steering column, so as to ensure the same effects and merchandise as when applying telescopic to fit the driver of various body types At one point is the point.

The present invention will be described with respect to the configuration of each component different from the conventional tilt device, but in the assembling order.

1) Outer tube 11: a portion surrounding the outer outer side of the steering column 10, located on the lower side relative to the axial direction of the outer tube 11, 'T' from the bottom of the outer tube 11 to the center portion The shaped cutout groove 12 is formed.

2) Distance bracket: Unlike the conventional one, it is separated into two, and the first and second distance brackets 13 and 14 are attached to the left and right sides with the incision groove 12 therebetween.

At this time, the first and second distance brackets 13 and 14 are spaced apart from each other by the same width as the incision groove 12, and the long holes (left and right sides) of the first and second distance brackets 13 and 14 respectively. 15) is formed.

3) Lower tube (16): disposed on the lower end of the outer tube (11), the lower end of the plastic bush 17 is pressed into the upper end of the lower tube (16), the tilt bolt through hole in the upper end of the plastic bush (17) The protruding piece 18 in which 18a was formed is formed in the radial direction.

The plastic bush 17 press-fitted to the upper end of the lower tube 16 has a structure in which energy is absorbed by the frictional force only at the time of collision, and is normally fixed.

4) Plastic bush 17 is inserted into the lower end of the outer tube 11, the projection piece 18 is movable in the axial direction along the incision groove 12, the first and second distance bracket (13, 14, the tilt bolt 19 is coupled to each other through the long hole 15 and the through hole 18a.

5) Upper shaft 20: The outer tube 11, the plastic bush 17 and the lower tube 16 is inserted into the inside, the upper end of the upper shaft 20 protrudes above the outer tube (11).

In addition, since the ball bearing 21 is press-fitted to the upper portion of the upper shaft 20 and then fixed by caulking at its circumference, the outer tube 11 and the upper shaft 20 can be induced in relative motion, and the upper shaft 20 The inner circumferential surface of the bottom of the) is subjected to serration 22 (SERRATION).

6) Tilt bracket 23: the cross section is formed of 'ㅠ', the coupling piece 23a is formed in parallel in the lower center, the coupling piece 23a is inclined slot 23b in accordance with the changed trajectory according to the present invention Are respectively formed in the inclined direction.

The coupling piece 23a is disposed on the outer surfaces of the first and second distance brackets 13 and 14, and the tilt bolt 19 is formed through the inclined slot 23b, the long hole 15 and the through hole 18a. Through, the tilt bracket 23, the first and second distance brackets 12 and 13 are coupled, and the tilt lever 24 and the tilt cam 25 are assembled to the tilt bolt 19.

The tilt lever 24 serves to apply a tightening force between the engaging piece 23a of the tilt bracket 23 and the first and second distance brackets 13 and 14, and the tilt bracket 23 and the distance. The outer tube 11 and the upper shaft 20 may move in the longitudinal direction and the vertical direction according to the tightening force between the brackets 13 and 14.

7) Other components coupling: Serration 22 formed on the lower inner peripheral surface of the upper shaft 20 and the MDPS input shaft 26 is coupled, and peripheral components such as capsule 27 on the top of the tilt bracket 23 is coupled To complete it.

Referring to the operating state of the vehicle tilt and telescopic mixed steering column according to the present invention by such a configuration as follows.

As the length of the steering column 10 is neutral, when the tilt lever 24 is released in order to first adjust the steering column 10 to the body shape of the driver, the tilt lever 24 is moved by the step of the tilt cam 25. The coupling piece 23a of the tilt bracket 23 is opened.

At the same time, while the tightening force between the tilt bracket 23 and the first and second distance brackets 13 and 14 is released, the protruding pieces 18 of the plastic bushing 17 are axially along the cutout groove 12. The outer tube 11, the upper shaft 20, and the first and second distance brackets 13 and 14 are moved relative to the column axis by the structure of the serration 22 at the bottom of the upper shaft 20. Moveable in the direction.

In addition, the tilt bolt 19 is movable up and down along the inclined slot 23b of the tilt bracket 23 by releasing the tightening force between the tilt bracket 23 and the distance brackets 13 and 14. .

According to the operation state as described above, the present invention changes the structure of the outer tube (11), distance bracket (13, 14), plastic bushing (17) and the tilt bracket (23) to be adjusted simultaneously in the axial direction and the vertical direction By doing so, the pop-up phenomenon at the time of collision can be prevented fundamentally.

This is because the length of the column should be increased in order to generate the pop-up, but the pop-up cannot occur because the load is applied in the opposite direction by the dummy.

In addition, it is possible to reduce the cost compared to the structure applied to the conventional telescopic device and gears, and to adjust the position of the steering wheel 28 to fit a variety of body type driver can improve the marketability.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

As seen above, according to the vehicle tilt and telescopic hybrid steering column according to the present invention, by changing the structure of the outer tube, distance bracket, plastic bushing and tilt bracket to be adjusted simultaneously in the axial direction and the vertical direction, It can fundamentally prevent pop-ups during collisions.

In addition, compared with the conventional telescopic device and gear structure, the cost can be reduced and the position of the steering wheel can be adjusted to fit the driver of various body shapes, thereby improving the product quality.

Claims (7)

For automotive tilt and telescopic mixed steering columns, A length adjusting means inserted into the outer tube to adjust the length in the axial direction; An upper shaft inserted into the outer tube and having an upper end attached to the upper inner circumferential surface of the outer tube by a ball bearing; Fastening means seated on the outer tube to lock and unlock the outer tube and the plastic bushing; Tilt brackets surrounding one side of the outer tube and both sides of the tightening means, the inclined slots formed on both sides; A tilt bolt penetrating the length adjusting means, the tightening means and the inclined slot; Tilt and telescopic hybrid steering column for cars, characterized in that configured to include. The method according to claim 1, wherein the length adjusting means An incision groove formed in the axial direction from the lower end to the center of the outer tube; Tilt and telescopic mixed steering column for a vehicle, characterized in that formed in the upper end of the plastic bush in a radial direction, consisting of a protrusion that is axially movable along the incision groove. The method of claim 2, wherein the tightening means First and second distance brackets attached to the left and right sides of the outer tube with the incision groove interposed therebetween, and having a long hole formed at both sides thereof; It comprises a tilt lever and a tilt cam mounted on one end of the tilt bolt, the tilt lever is a vehicle tilt and telescopic hybrid steering, characterized in that the pressing of the tilt bracket, the first and second distance brackets column. The method according to claim 1, Tilt and telescopic mixed steering column for a vehicle, characterized in that the upper end of the lower tube is press-fitted to the lower end of the plastic bush, it is fixed in normal, and absorbs energy by the frictional force only in the event of a collision. The method according to claim 1, The lower inner circumferential surface of the upper shaft is serrated so that the upper shaft is movable in the axial direction when coupled with the MDPS input shaft. The method according to claim 2, Tilt and telescopic mixed steering column for a vehicle, characterized in that formed in the "T" shape. The method according to claim 1, The tilt bracket may include a wing portion having an upper end formed in a horizontal direction and having a central convex protrusion; A coupling piece formed parallel to the lower surface of the wing in a vertical direction; Tilt and telescopic hybrid steering column for a vehicle, characterized in that it comprises an oblique slot formed in the oblique direction on the coupling piece.

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