KR102093228B1 - Steering column - Google Patents

Abstract

The present invention relates to a steering column comprising: a housing which is provided with a mounting bracket fixed on a vehicle; an inner tube which is installed in a hollow part of the housing to extend and contract in an axial direction, and has a hollow part formed therein to wrap a steering shaft; a guide block which is fixed on one end of the inner tube; and a bending plate which is bent to wrap a front surface of the guide block to be inserted into a guide groove which is formed on both sides at a lower portion of the guide block in a longitudinal direction. According to the present invention, the bending plate is transformed to absorb the load when a load is applied in accordance with an axial movement of the guide block. According to the present invention, the steering column adjusts screw torque of a fixing bolt to control an initial peak load, and applies the guide block and the bending plate to absorb the running load, which is the annealing load, in a stable manner, thereby having an optimized load absorption structure in which it is easy to control the initial peak load and the running load.

Description

Steering column {STEERING COLUMN}

The present invention relates to a steering column, and more particularly, to a steering column having an optimized load absorbing structure for easy control of initial peak load and running load.

In general, the steering column is formed to surround the steering shaft that transmits the rotational force generated by the driver's steering wheel operation to the rack-pinion mechanism, supports rotation of the steering shaft, and is fixed to the position of the steering shaft by being coupled to the vehicle body through a bracket. Device.

The steering column can add a telescope or tilt function for the operator's convenience. The tilt is for adjusting the fixed angle of the steering wheel, and the telescope can be extended and contracted in the axial direction. It is formed by inserting two hollow pipes to absorb shock energy as the steering shaft and steering column collapse when a vehicle crashes.

Accordingly, the steering column may be classified into a telescopic type or a tilt type according to the above-described functions, and in some cases, a tilt function may be added to the telescopic type steering column, and the driver may adjust his / her height or body shape through these functions. It is possible to operate smoothly by adjusting the protruding degree or the tilting angle of the steering wheel to fit.

A representative example of such a steering column is disclosed in FIG. 1. Hereinafter, a steering column according to the related art will be schematically described with reference to FIG. 1.

Referring to FIG. 1, the conventional steering column presses the mounting bracket 10 installed on the vehicle, the housing 20 installed on the mounting bracket 10, and the tilt bracket 10 and the housing 20. Or it consists of an operation lever 30 to release the pressure.

In addition, the housing 20 is formed with a slit 21 for pressing the inner tube 40 and a telescopic guide 22 through which the adjustment bolt 31 of the operation lever 30 slides.

In the conventional steering column, as the steering column is collapsed to absorb external shock, the adjustment bolt 31 moves to the tele-guide (right side in FIG. 1) position of the telescopic guide 22. There is a problem in that the fixed force deviation of the operating lever 30 does not properly absorb the impact.

Publication Patent Publication No. 10-2006-0081095 (published on July 12, 2006)

The present invention has been devised to solve the above-mentioned conventional problems, and the object of the present invention is to control the initial peak load by adjusting the tightening torque of the fixing bolt, and apply a guide block and a bending plate to run. That is, it is to provide a steering column having an optimized load absorbing structure that is easy to control the initial peak load and the running load because it can stably absorb the loosening load.

The present invention for achieving the above object is a housing provided with a mounting bracket fixed to the vehicle; An inner tube installed in the hollow of the housing to extend and contract in the axial direction and to form a hollow to surround the steering shaft; A guide block fixed to one end of the inner tube; And a bending plate that is bent to surround the front surface of the guide block and is inserted into guide grooves formed in the longitudinal direction on both lower sides of the guide block, wherein the bending plate is loaded with an axial movement of the guide block. It provides a steering column characterized in that the ground is deformed to absorb the load.

Here, it is arranged to accommodate the guide block in the interior space, the first fastening hole, the first through-hole and the first bolt hole along the longitudinal direction on one surface further comprises a tele guide formed at a predetermined interval do.

In addition, one surface of the tele guide is characterized in that a protrusion extending vertically around the first through hole is formed, and a part of the protrusion is formed with a pair of locking jaws facing each other in the width direction.

In addition, the banding plate, one end is inserted through the first through-hole of the tele guide is fixed to the upper surface of the tele guide; And bending portions extending from the other end of the fixing portion to face the fixing portion with the guide block interposed therebetween, and inserting portions formed on both sides based on guide holes formed along the longitudinal direction to be inserted into the guide grooves of the guide block. It is characterized by including wealth.

In addition, a second fastening hole, a second through hole and a second bolt hole are formed at positions corresponding to the first fastening hole, the first through hole and the first bolt hole of the tele guide, and fastened to the second fastening hole Further comprising a tele-bracket coupled to the tele-guide and the fixing portion by the fastening means, a pair of locking jaws of the tele-guide is inserted into the second through-hole of the tele-bracket to maintain a locked state Is done.

In addition, the second bolt hole of the tele bracket, the first bolt hole of the tele guide, the guide hole of the banding plate, and further comprising a fixing bolt inserted into and fastened to the fixing hole of the guide block.

In addition, the tele-bracket is characterized in that it further includes a drive coupling portion having a plurality of holes formed on one side, and is connected to the drive coupling portion and provides a driving force for linear reciprocating movement.

The steering column according to the present invention can control the initial peak load by adjusting the tightening torque of the fixing bolt, and apply the guide block and banding plate to stably absorb the running load, that is, the loosening load, so that the initial peak load and It has an optimized load absorbing structure that makes it easy to control running loads.

In addition, since the steering column according to the present invention has a relatively short position where a driving unit providing a driving force for linear reciprocating movement and a telebracket are relatively short, the operating noise that may occur due to the distance from the telemotor is improved. It has an effect.

1 is a view showing a steering column according to the prior art.
2 is a perspective view of a steering column according to the invention.
3 is an exploded perspective view showing an inner tube, a guide block, a tele guide, a bending plate, and a tele bracket in the steering column according to the present invention.
4 is a perspective view showing a state in which an inner tube, a guide block, a tele guide, a bending plate, and a tele bracket are assembled in a steering column according to the present invention.
5 is a perspective view showing the guide block and the bending plate in the assembled state shown in FIG. 4.
6 is a perspective view showing a state when a load is applied to the inner tube due to a collision of a vehicle in the assembled state shown in FIG. 4.
7 is a perspective view showing the guide block and the bending plate in the assembled state shown in FIG. 6.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible, even if they are displayed on different drawings. In addition, when it is determined that the subject matter of the present invention may be obscured, the detailed description thereof will be omitted. In addition, although the embodiments of the present invention will be described below, the technical spirit of the present invention is not limited to or limited thereto, and can be practiced by those skilled in the art.

Figure 2 is a perspective view of a steering column according to the present invention, Figure 3 is an exploded perspective view showing an inner tube, a guide block, a tele guide, a bending plate and a tele bracket in the steering column according to the present invention, Figure 4 is according to the present invention The steering column is a perspective view showing an inner tube, a guide block, a tele guide, a bending plate, and a tele bracket in an assembled state, and FIG. 5 is a perspective view showing a guide block and a bending plate in an assembled state shown in FIG. 4, and FIG. 4 is a perspective view showing a state when a load is applied to an inner tube due to a collision of a vehicle in the assembled state shown in FIG. 4, and FIG. 7 is a perspective view showing a guide block and a bending plate in the assembled state shown in FIG. 6.

Hereinafter, a steering column 1 according to a preferred embodiment of the present invention will be described with reference to FIGS. 2 to 7.

As shown in Figure 2, the steering column 1 according to the present invention, the mounting bracket 110 is fixed to the vehicle is installed in the housing 100 provided on the outside and the hollow of the housing 100 in the axial direction It is made of an inner tube 200 formed with a hollow so as to surround the steering shaft 10 and stretch and contract. Here, the inner tube 200 in which the steering shaft 10 is installed is a generic term for all components that accommodate the steering shaft 10 inside to support rotation of the steering shaft 10.

Meanwhile, the housing 100 may be configured such that a tilt motor 20 is installed on one side to provide a tilt function. Also, a telemotor 30 configured to be provided with a telescope function may be installed at a position parallel to the tilt motor 20. That is, the steering column according to the present invention is a parallel type (Parallel type) motor structure is applied, the tele-bracket 600 to be described later is coupled to the tele-motor 30 without axial movement of the lead screw shaft during the operation of the tele function before and after It is a structure that moves in the direction. This structure is suitable for use in an electric vehicle (EA) because it can reduce the overall length.

In addition to the above-described configuration, various components are further included, but conventional functions are applied to components for parts not directly related to the present invention, and other structures known in the art may be employed for other structures. A detailed description thereof will be omitted.

Hereinafter, the guide block 300, the tele guide 400, the bending plate 500, and the tele bracket 600 of the steering column 1 according to the present invention will be described.

3 and 4, the guide block 300 is inserted into the groove 210 formed at one end of the inner tube 200 in the axial direction of the inner tube 200 and fixed by a fastening member 320 do.

Here, the upper surface of the guide block 300 disposed on the outside of the inner tube 200 is formed in a flat surface. The upper portion of the guide block 300 is formed with a fixing hole 330 on one side of the inner tube 200. The fixing hole 330 may include a fixing bolt 700 to be described later.

In addition, guide grooves 310 are formed in the longitudinal direction on both sides of the lower portion of the guide block 300 disposed inside the inner tube 200. The bending groove 500 to be described later may be inserted into the guide groove 310.

In the tele guide 400, a first fastening hole 410, a first through hole 420, and a first bolt hole 430 are formed at predetermined intervals along a longitudinal direction on one surface, and are opposed to each other from one surface. An inner space may be formed between both extended sides to accommodate the guide block 300.

Here, one surface of the tele guide 400 is formed with a protrusion 421 extending vertically around the first through hole 420. At this time, it is preferable that a part of the protrusion 421 is formed with a pair of locking jaws 422 facing each other in the width direction. The pair of locking jaws 422 may be formed to be caught in the tele bracket 600 to be described later.

The bending plate 500 is bent to surround the front surface of the guide block 300, and includes a fixing portion 510 and a bending portion 520.

The fixing part 510 is one end is inserted through the first through hole 420 of the tele guide 400 is fixed to the upper surface of the tele guide 400, the first fastening hole 410 of the tele guide 400 The coupling hole 511 is formed at the corresponding position. At this time, since the protrusion 421 is formed around the first through hole 420, the portion inserted into the first through hole 420 in the fixing part 510 is upward by the height at which the protrusion 421 extends vertically. It is desirable to bend at an angle.

In the fixing part 510, the coupling hole 511 may be formed such that fastening means 611 such as a fastening bolt fastened to the tele bracket 600, which will be described later, is coupled. Here, the fastening means 611 penetrates through the second fastening hole 610 of the tele bracket 600, the first fastening hole 410 of the tele guide 400, and the coupling hole 511 of the fixing part 510. Can be concluded.

The bending portion 520 extends from the other end of the fixing portion 510 and is bent to face the fixing portion 510 with the guide block 300 interposed therebetween. Specifically, the bending portion 520 may be formed to be integrally formed from the fixing portion 510 fixed to the upper surface of the tele guide 400 and bent in a U shape. Here, the bending portion 520 is a guide hole 521 is formed along the longitudinal direction, the insertion portion 522 formed on both sides based on the guide hole 521 is a guide groove 310 formed in the guide block 300 Can be inserted in.

As such, since the bending portion 520 is inserted into the guide groove 310 of the guide block 300 and can be deformed along the guide groove 310, it can be deformed straight without being inclined when an impact to be described later is applied. have.

The banding plate 500 has an advantage in that it is easy to change the thickness and width to easily absorb loads due to impact.

The tele bracket 600 is a second fastening hole 610, a second fastening hole 610, a position corresponding to the first fastening hole 410, the first through hole 420 and the first bolt hole 430 formed in the tele guide 400 2 through holes 620 and second bolt holes 630 may be formed.

As described above, the second fastening hole 610 formed in the tele bracket 600 may be inserted through the fastening means 611. The fastening means 611 may also be fastened through the first fastening hole 410 of the tele guide 400 formed at a position corresponding to the second fastening hole 610 and the coupling hole 511 of the fixing part 510. You can. That is, the fixing portion 510 of the tele bracket 600, the tele guide 400 and the bending plate 500 may be coupled to each other by fastening means 611.

In addition, the second through hole 620 of the tele bracket 600 is formed so that the pair of locking jaws 422 of the tele guide 400 is caught. That is, the tele bracket 600 may slide while maintaining the engaging state with the tele guide 400 by the pair of engaging jaws 422.

On the other hand, the second bolt hole 630 of the tele bracket 600 may be formed long along the longitudinal direction of the tele bracket 600, the fixing bolt 700 may be inserted through. The fixing bolt 700 includes a first bolt hole 430 of the tele guide 400 formed at a position corresponding to the second bolt hole 630, a guide hole 521 of the bending plate 500, and a guide block 300 ) Can be inserted into the fixing hole 330 and fastened. That is, the tele bracket 600, the tele guide 400, the bending portion 520 of the bending plate 500 and the guide block 300 may be coupled to each other by a fixing bolt 700.

The fixing bolt 700 may control the initial peak load during a collision by adjusting the tightening torque. That is, it is easy to adjust the absorption rate of the impact load by adjusting the tightening torque of the fixing bolt 700.

On the other hand, the tele bracket 600 includes a driving coupling portion 640 having a plurality of holes for connecting to the tele motor 30 on one side. In this way, the tele-bracket 600 has a driving coupling portion 640 formed on one side, and thus a position connected to a driving portion providing a driving force for linear reciprocating movement, such as the tele-motor 30, is relatively short. There is an effect of improving the operating noise that may occur due to the distance of the wah.

Hereinafter, the operation of the steering column 1 according to the preferred embodiment of the present invention will be described with reference to FIGS. 4 to 7 as follows.

4 and 5, the bending portion 520 of the banding plate 500 is inserted into the guide groove 310 of the guide block 300 to support the lower portion of the guide block 300 as usual. to be.

In addition, the fixing bolt 700 is inserted into a position close to the second through hole 620 in the second bolt hole 630 of the tele bracket 600 and the tele guide formed at a position corresponding to the second bolt hole 630 The first bolt hole 430 of the 400, the guide hole 521 of the bending plate 500, the fixing hole 330 of the guide block 300 is fastened through.

When the load is applied to the inner tube 200 due to the collision of the vehicle as shown in FIGS. 6 and 7 in the above-described state, while the guide block 300 moves in the axial direction, the load on the bending plate 500 Add. At this time, when the load is a load greater than the size exceeding the yield point of the banding plate 500, the guide block 300 pushes the banding plate 500 out.

That is, when the guide block 300 moves backward, the fixing portion 510 of the bending plate 500 coupled to the tele bracket 600 and the tele guide 400 moves forward while the bending portion 520 is deformed. Is done. In this process, since the bending plate 500 is sequentially deformed to absorb the shock, the shock received by the driver is efficiently absorbed to prevent injury.

In addition, since the bending plate 500 is deformed along the guide groove 310 in a state where the bending portion 520 is inserted into the guide groove 310 of the guide block 300, the bending plate 500 may be deformed straight without being inclined. .

In addition, by adjusting the tightening torque of the fixing bolt 700, it is possible to control the initial peak load in the event of a collision. That is, when a load is applied to the inner tube 200 due to a collision, the fixing bolt 700 fastened to the tele bracket 600, the tele guide 400, the bending plate 500, and the guide block 300 is initially Shock load can be absorbed.

As described above, the present invention controls the initial peak load by adjusting the tightening torque of the fixing bolt 700, and stably controls the running load, that is, the loosening load by applying the guide block 300 and the bending plate 500. Since it can absorb, it has an optimized load absorbing structure that is easy to control the initial peak load and running load. Therefore, the steering column of the present invention has the effect of securing cost competitiveness.

The preferred embodiments of the present invention have been described above in detail, but the technical scope of the present invention is not limited to the above-described embodiments and should be interpreted by the claims. At this time, those skilled in the art should consider that many modifications and variations are possible without departing from the scope of the present invention.

1: Steering column 10: Steering shaft
20: Tilt Motor 30: Tele Motor
100: housing 110: mounting bracket
200: Inner tube 210: Home
300: guide block 310: guide groove
320: fastening member 330: fixing hole
400: tele guide 410: first fastening hole
420: first through hole 421: protrusion
422: pair of locking jaws 430: first bolt hole
500: banding plate 510: fixing portion
511: coupling hole 520: banding
521: guide hole 522: insertion portion
600: tele bracket 610: second fastening hole
611: fastening means 620: second through hole
630: second bolt hole 640: drive coupling
700: fixing bolt

Claims (7)

A housing provided with a mounting bracket fixed to the vehicle;
An inner tube installed in the hollow of the housing to extend and contract in the axial direction and to form a hollow to surround the steering shaft;
A guide block fixed to one end of the inner tube and having guide grooves formed on both lower sides in a longitudinal direction;
The guide block is arranged to accommodate the interior space, and a first fastening hole, a first through hole, and a first bolt hole are formed at predetermined intervals along a longitudinal direction on one surface, and vertically around the first through hole. An extended protrusion is formed, and a part of the protrusion is formed with a pair of locking jaws facing each other in a width direction;
One end is inserted through the first through-hole of the tele guide and fixed to the upper surface of the tele guide, and a bending portion extending from the other end of the fixed portion and bent to surround the front surface of the guide block, the A bending plate including a guide hole formed along a longitudinal direction and an insertion portion formed on both sides of the guide hole and inserted into a guide groove of the guide block; And
A second fastening hole, a second through hole and a second bolt hole are formed at positions corresponding to the first fastening hole, the first through hole and the first bolt hole of the tele guide, and the fastening is fastened to the second fastening hole It is coupled to the tele guide and the fixing portion by means, the second through-hole is a tele-bracket formed to extend long along the longitudinal direction, the pair of engaging jaws are inserted to maintain the locked state. It includes,
The bending plate is a steering column, characterized in that when the load according to the axial movement of the guide block is deformed to absorb the load.
delete delete delete delete According to claim 1,
Steering column, characterized in that it further comprises a fixing bolt which is inserted into and fastened to the second bolt hole of the tele bracket, the first bolt hole of the tele guide, the guide hole of the banding plate, and the guide block.
The method of claim 6,
The tele bracket includes a driving coupling portion having a plurality of holes formed on one side,
Steering column, characterized in that it further comprises a driving unit that is connected to the driving coupling unit and provides a driving force for linear reciprocating movement.

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