KR100546511B1 - Steering tilt column assembly for vehicle - Google Patents

Abstract

The present invention relates to a steering tilt column assembly for an automobile, and a main object of the invention is to maintain a stable state of engagement between the fixed gear and the movable gear engaged in order to maintain the tilting state, thereby improving the safety of the tilting and stopping state. On the other hand, the objective is to allow the upward rotation operation of the movable gear to be directly operated by the tilt lever so as to reduce the parts as much as possible and reduce the manufacturing cost, and on the other hand, the hinge of the tilt lever The purpose is to improve the bolts to prevent noise or loosening of the tilt lever.

Characteristic means of the present invention for achieving the above object is provided between the column bracket and the tilt bracket 212, the tilting control means 300 including a fixed gear 310 and a movable gear 320, this tilting The adjusting means 300 is fixed to the upper surface of the column bracket 222, the fixed gear 310 having a teeth 311 on the upper surface, and the teeth 321 of the bottom surface to the teeth of the fixed gear To be engaged, but a protrusion 323 is formed on the upper surface, the movable gear 320 and the rotatable movable gear 320 on the tilt bracket 212, the lower surface so as to press the protrusion 323 of the movable gear 320. A wedge member 330 having a wedge portion 331 and having a connection protrusion 332 at the bottom end thereof, and a coupling hole 344 into which the connection protrusion 332 of the wedge member 330 is fitted. The hinge bolt 347 has a hinge hole 343 that can be rotatably fastened on the tilt bracket 212. The handle 342, the handle 341 extending from one end of the transverse portion 342, and the side protrusion 324 of the movable gear 320 may be lifted while being connected from the other end of the transverse portion 342. The tilt lever 340 formed by the extension part 345 having the gradient part 346, the spring 350 for pulling the wedge member 330 in one direction, and the tilt lever 340 are rotated. When it is done, it comprises a tension spring 230 for returning to the original position.

Steering, Column, Tilt, Tilt Bracket, Column Bracket, Shock Absorption

Description

Steering Tilt Column Assembly for Cars {STEERING TILT COLUMN ASSEMBLY FOR VEHICLE}             

1 is a perspective view showing a conventional steering column assembly,

2 is a perspective view showing a tilting structure of a conventional steering column;

3 is a perspective view showing an assembled state with a conventional capsule,

Figure 4 is a cross-sectional view showing the structure of a conventional hinge bolt,

5 is a perspective view showing the overall configuration of the present invention,

6 is a plan view showing the overall configuration of the present invention,

7 is a rear view showing the overall configuration of the present invention,

8 is a front sectional view showing an overall configuration of the present invention;

9 is an exploded perspective view showing the main configuration of the tilting control means of the present invention,

10 is a plan view showing an operating state of the tilting control means of the present invention,

11 is a front sectional view showing an operating state of the tilting control means of the present invention,

12 is a cross-sectional view showing a hinge portion of the tilt lever of the present invention,

13 is a cross-sectional view showing another embodiment of the hinge portion for a tilt lever of the present invention;

14 is a block diagram of the initial shock absorbing means of the present invention,

15 is a cross-sectional view showing the capsule and the assembled state of the present invention,

Figure 16 is a cross-sectional view showing another embodiment of the seating recess portion for the capsule of the present invention

17 is a cross-sectional view showing a capsule of the present invention,

18 is a configuration diagram of the lower impact absorbing means of the present invention;

19 is a cross-sectional view showing the assembled state of the lower shock absorbing means of the present invention;

20 is a configuration diagram of another embodiment of the lower shock absorbing means of the present invention.

<Code Description of Main Parts of Drawing>

100: steering shaft 101: upper shaft

102: lower shaft 103: universal joint

200: steering column 201: hinge pin

210: upper unit 211: upper tube

212: tilt bracket 213: shroud bracket

220: lower unit 221: lower tube

222: column bracket 223: low mounting bracket

230: tension spring 300: tilting control means

310: fixed gear 311: teeth

320: movable gear 321: teeth

323: protrusion 324: side projection

325: shaft pin 330: wedge member

331: wedge portion 332: connecting projection

340: tilt lever 341: handle

342: transverse section 343: lever hinge hole

344: coupling hole 345: extension

346: coastal gradient 347: hinge bolt

350: spring 400: initial shock absorbing means

410: Capsule 411: Top

412: lower plate 413: protrusion

414: elastic portion 415: bolt hole

500: lower shock absorbing means

The present invention relates to a steering tilt column assembly for an automobile, and more particularly, to maintain the engagement state of the fixed gear and the movable gear engaged to maintain the tilting state at all times, and the upward rotation operation of the movable gear. It can be used to directly operate the tilt lever so that some parts can be omitted, and the bolt used for the lever hinge of the tilt lever does not affect the rotational friction when the tilt lever is rotated to prevent noise and loosening. By improving the material and structure of the initial shock absorbing capsule used in the mounting bracket, it is easy to manufacture and the cost can be reduced while the shock absorbing effect is increased, and the joint structure of the lower end of the column and the low bracket has a cross-section with a reduced diameter. The shock absorber and fastening fixation can be achieved without the need for double columns. There are two features that make it possible.

In general, the steering tilt column assembly for a vehicle is installed outside the steering shaft 20 provided to transmit the rotational force generated from the steering wheel to the gearbox and supports the rotation thereof and simultaneously connects it to the vehicle body.

1 is an exemplary view of a conventional general steering tilt column assembly.

As shown in FIG. 1, as a means for connecting the steering tilt column assembly to the vehicle body, a mounting bracket 70 fixed at an intermediate position of the column 10 and a capsule inserted into a slot on both sides of the mounting bracket 80 ) And a lower bracket 90 fixed to the lower end position of the column 10 formed of the outer tube 10a and the inner tube 10b, that is, the lower end of the inner tube 10b.

The steering shaft 20 is connected to the steering wheel and the gearbox, the upper and lower, respectively, between them is connected by a universal joint that transmits the rotational force in a refracted state within a predetermined angle.

In addition, the steering column supporting the steering shaft is provided with a tilting device for adjusting the angle of the steering wheel according to the physical condition of the driver by fixing it so that the steering shaft can maintain the refracted state.

This tilting device can be seen in detail through FIG. 2.

Here, the column bracket 30 is installed on the upper side of the steering column 10, the tilt bracket 40 is installed on both sides of the column bracket 30 to surround it, the column bracket 30 and the tilt bracket 40 are respectively connected to both ends of the dividedly formed steering shaft 20.

In addition, both side surfaces of the column bracket 30 and the tilt bracket 40 are respectively coupled through the tilt hinge 32 so that when the steering shaft 20 installed therein is deflected, the universal joint is not shown. Interlocked and refracted.

On the other hand, the outer side of the column bracket 30 is provided with a circular arc-shaped fixed gear 31 having the same center as the center of the hinge hinge 32, the teeth formed on the outer peripheral surface, the tilt bracket 40 is provided The movable gear 41 is formed so as to be separated from the 31.

That is, the movable gear 41 is one end is coupled to the tilt bracket (40) by the gear hinge 42 is rotated, the tooth portion of the teeth of the fixed gear 31 is formed on the inner peripheral surface of the front end is formed. It is elastically supported by a spring, not shown, and is always decoupled.

In addition, the tilt bracket 40 is spaced apart from the movable gear 41 and the fixed gear 31 so as to deflect the column bracket 30, the tilt bracket 40 and the steering shaft 20. ) Is provided to rotate.

That is, one side of the movable gear 41 is provided with a protruding movable pin 43, and the rotating member is provided on the lower side of the movable pin 43 to lift the movable gear 41 through the movable pin 43. 50 is provided, and the pivot member 50 is pivotally installed at its center by a hinge 32 for tilting.

At this time, the rotating member 50 is bent to face both ends of the pivoting member 32 is installed between the tilt bracket 40 and the column bracket 30, the middle side of the movable gear 41 Covering the outside, the rotating portion 51 is formed on the lower side of the movable pin 43.

In addition, the rotating member 51 of the rotating member 50 is connected to the gear hinge 42, which is the pivoting point of the movable gear 41, is restored after the operation of the rotating member 50 and at the same time the tilt bracket 40 And a restoring spring 54 is installed to return to the original position after one side bend of the column bracket 30.

In addition, on the opposite side of the restoring spring 54 based on the hinge hinge 32, another restoring spring having a diameter larger than this so that the tilting bracket 40 and the column bracket 30 can be restored after being deflected to the other side. 55 is installed.

In addition, on the side opposite to the rotating part 51 of the rotating member 50, a connecting part 52 is extended and bent toward the tilt bracket 40 side, and the connecting part 52 is a lever provided in the tilt bracket 40. The middle side of the hinge 61 is connected to one end of the tilt lever 60 to be rotatably fixed via a connecting spring 53.

As a result, when the handle side of the tilt lever 60 is pulled, one end of the tilt lever 60 pushes the connecting portion 52. As a result, the rotating member 50 rotates, and the rotating part 51 thereof moves the movable gear 41. ), And thus the movable gear 41 and the fixed gear 31 are spaced apart to be tiltable.

On the other hand, the steering tilt column assembly is provided with a shock absorbing structure.

One of them is to exhibit an initial shock absorbing function, the capsule 80 to be fitted to the mounting bracket 70, the other is a collapsing structure to exhibit the shock absorbing function in the lower mounting portion.

In the latter, as shown in FIG. 1, the steering column 10 inserts and combines two hollow tubes of the outer tube 10a and the inner tube 10b such that the steering column 10 contracts when the shock is transmitted, and a curling part is formed between the outer tube and the inner tube. 10c) is provided.

However, such a tilting device of a conventional steering column for a vehicle is pointed out the following disadvantages.

First, there is no separate structure and device to support the separation of the fixed gear and the movable gear, there was a problem that the movable gear and the fixed gear is easily separated during external shock transmission.

That is, when abnormal external force or vibration occurs, there is no means to continuously press the movable gear 41 toward the fixed gear 31 so that the movable gear 41 can rise, which means that the locked state There is an opening to be terminated.

Second, the rotating member 50 is used as a means for lifting the movable gear 41 by installing a tilt hinge between the tilt bracket and the column bracket, but this is a thin steel plate that is rotated, its rigidity is weak, It is a problem that pop-ups (bumping of steering wheels) may occur because of bending when shock is transmitted, and there is room for omission through structural improvements.

Third, in the steering column tilting apparatus of FIG. 1, the general lever 61a is fastened to the lever hinge 61 in order to fix the tilt lever 60 on the tilt bracket 40 so as to be rotatable.

When the fastening state of the general bolt 61a is seen, as shown in Fig. 4, a separate plate 60b, parts such as rivets 60a, bolts 61a, levers 60, and the like are required. Since work processes such as bolt seat riveting have to be added, there are disadvantages in terms of manufacturing cost.

In addition, since the bolt 61a and the upper surface of the tilt lever 60, the bottom of the tilt lever 60 and the upper surface of the tilt bracket 40 are kept in close contact with each other, the bolt 61a is tightened strongly. When the tilt lever 60 rotates, the friction force is large, the operation is difficult, and if tightened too loosely, there is a problem that the play occurs and the bolt 61a is gradually loosened, as well as noise.

Fourth, it is a structural problem of the capsule 80 used to fix the mounting bracket 70 to the vehicle body and the portion where the capsule is assembled.

The mounting bracket 70 has a middle side thereof coupled to surround the top side of the steering column 10, and both ends extending therefrom have an extended portion 71 formed to face the vehicle body, and the extended portion 71 includes: An upper slot 72 is formed. And the capsule 80 is provided by injection molding aluminum, the insertion groove 81 is formed on both sides so that the outer periphery of the slot 72 is inserted, the bolt 84 is penetrated in the center side to be fixed to the vehicle body The bolt hole 82 is to be formed.

This can be seen through Figure 3, wherein the outer periphery of the capsule 80 to be engaged with each other and the outer periphery of the slot 72 is formed with a plurality of capsule holes 83 and slot holes 73 penetrating upward and downward Inside them, a plastic material is injected to solidify the pin shape.

That is, the solidified plastic material is to connect the capsule 80 fixed to the vehicle body and the mounting bracket 70 fixed to the steering column 10, and when the external shock is transmitted to the steering column 10, the capsule is broken. At 80, the steering column 10 is detached.

However, the separation device of the conventional steering column for a vehicle configured as described above requires a complicated process of injecting and solidifying a plastic material into a slot hole communicating with a capsule hole formed in the capsule and a mounting bracket coupled thereto. Therefore, the installation process is cumbersome, and as the installation process is cumbersome, the manufacturing cost is high.

In addition, in the load management with the fixing pin made of plastic, the range of application is limited because the load management range is low due to the characteristics of the material. For this purpose, the structure becomes more complicated by adjusting the number and thickness of the fixing pin. .

Fifth, there is a problem regarding the steering column 10, the row bracket 90 for supporting the lower end of the column, and the shock absorbing structure in this portion.

The important point in this shock absorbing structure is to use a low bracket to fix the bottom of the column to the car body, and use a separate inner tube to provide a shock absorbing structure. The lower bracket must be welded to the bottom of the inner tube.

A conventional shock absorbing structure for this part can be seen in FIG.

That is, the outer tube 10a surrounding the steering shaft 20 and the inner tube 10b on which the lower bracket is fixed cause collapsing to absorb impact energy during a vehicle collision, and the inner tube 10b includes a lower bracket. One end portion is coupled to the inner circumferential surface of the outer tube 10a while being fixed to the vehicle body side by a 90, and a plurality of curling portions 10c are formed along the circumferential surface on the inner circumferential surface of the outer tube 10a.

In particular, the molding of the curling part 10c is made of a form in which a portion remaining after the piercing of the outer tube 10a is rolled into the inner side of the outer tube 10a, and the curling part 10c is formed. It is assembled with the end of the inner tube 10b to exert a friction force.

Therefore, when the impact energy during vehicle collision is transmitted through the steering shaft 20, the inner mounting portion 10b of the lower mounting portion collides with the curling portion 10c of the outer tube 10a, thereby collapsing. Shock energy is absorbed.

However, such a conventional structure has a problem in that the curling part 10c is torn off depending on the material of the material at the time of assembling the outer tube 10a and the inner tube 10b. The process of forming the curling portion 10b in 10a is not only very demanding, but also requires a number of parts because an inner tube must be added.

The present invention aims to provide a new steering tilt column assembly in which the conventional problems as described above are solved. The main object of the present invention is to provide a guard portion at the top of the tilt bracket and a wedge member interposed under the guard portion. In order to maintain the tilting state of the fixed gear and the movable gear which are engaged to keep the tilting state, it is also aimed at increasing the safety of the tilting state.

Another object of the present invention is to improve the upward rotation operation of the movable gear to be operated directly by the tilt lever, to eliminate the component called the conventional rotating member, to further increase the productivity and lower the manufacturing cost It is.

Still another object of the present invention is to use a bolt having a stepped straight line for the lever hinge bolt of the tilt lever, so that the tightening force of the bolt does not affect the rotational friction when the tilt lever is rotated, so that the noise in the tilt lever It is to prevent occurrence or bolt loosening in advance.

Another object of the present invention is to improve the material and structure of the initial shock absorbing capsule used in the mounting bracket, easy to manufacture and inexpensive, to enable the shock absorption only by the friction between the capsule and the mounting bracket. .                         

Still another object of the present invention is to improve the coupling structure of the lower end of the column and the low bracket to have a cross-section with a reduced diameter, so that it is possible to fasten and to absorb shock when an impact occurs.

A characteristic means of the present invention for achieving the above objects is a steering shaft including an upper shaft and a lower shaft, each of which is connected to a universal joint by a lower end and an upper side, and an upper side which includes the above-mentioned steering shaft and which surrounds the upper shaft. An upper unit consisting of a tube, a tilt bracket connected to the upper tube, a shroud bracket for fixing them to the vehicle body, a lower tube wrapped around the lower shaft described above, and left and right wings connected to an upper end of the lower tube. A lower bracket consisting of a column bracket having a slot for assembling a capsule in a portion and a low mounting bracket for fixing the lower end of the lower tube to a vehicle body, and hinge pin holes provided at both left and right sides of the tilt bracket; The hinge pin holes provided on both the left and right sides of the column bracket are hinged. A steering column coupled to the upper unit including the upper shaft with respect to the lower unit including the lower shaft so as to bend the hinge pin at a predetermined angle to the point, wherein the column bracket and the tilt bracket are between the column bracket and the tilt bracket. A tilting adjusting means including a fixed gear and a movable gear is provided, the tilting adjusting means being fixed to the upper surface of the column bracket, the fixed gear having teeth on the upper side thereof, and the toothed portion of the bottom of the fixed gear. And a wedge member having a protruding portion formed on an upper surface thereof, having a movable gear rotatable on the tilt bracket, a wedge portion on a bottom surface to press the protruding portion of the movable gear, and a wedge member having a connecting protrusion on the bottom surface thereof. On the tilt bracket by inserting a coupling hole and a hinge bolt into which the connecting projection of the wedge member can be fitted. An extension having a transverse section having a hinge hole that can be rotated so as to be rotatable, a handle portion extending from one end of the transverse portion, and a side slope of the movable gear while lifting from the other end of the transverse portion. It comprises a formed tilt lever, a tension spring for pulling the wedge member in one direction, and a tension spring for returning to the original position when the tilt lever is rotated.

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

5 is a perspective view showing the overall configuration of the present invention, Figure 6 is a plan view thereof, Figure 7 is a front view thereof.

Steering tilt column assembly of the present invention, as shown in the drawings, the lower and upper ends of the steering shaft 100 including the upper shaft 101 and the lower shaft 102 connected to the universal joint 103, and the An inner tube 211 having one steering shaft 100 wrapped around the upper shaft 101, a tilt bracket 212 connected to the upper tube, and a shroud bracket 213 for fixing them to the vehicle body The upper unit 210, and the lower tube 221 wrapped around the lower shaft 102 and the capsule assembly slot 222b on the left and right wing portions 222a while being connected to the upper end of the lower tube. It consists of a column bracket 222 having a lower unit 220 consisting of a low mounting bracket 223 for fixing the lower end of the lower tube 221 to the vehicle body.

Therefore, the hinge pin holes 212b provided at both left and right sides of the tilt bracket 212 and the hinge pin holes 212b provided at both the left and right sides of the column bracket 222 may be joined by the hinge pins 201. When tilting is possible.

That is, as shown in FIG. 7, the upper unit 210 including the upper shaft 101 with respect to the lower unit 220 including the lower shaft 102 has a predetermined angle to the hinge pin 201. The tilting control means 300 of the present invention which is very effective in the tilting operation as described above can be described through an exploded perspective view of FIG. 9.

First, it is fixed to the upper surface of the column bracket 222, the fixed gear 310 having the teeth 311 on the upper surface and the teeth 321 of the bottom to the teeth of the fixed gear A protruding portion 323 is formed on an upper surface thereof, and a wedge portion 331 is provided on the bottom surface of the tiltable bracket 212 so as to press the movable gear 320 and the protruding portion 323 of the movable gear 320. ), And a wedge member 330 having a connecting protrusion 332 at the tip bottom surface thereof is provided.

At this time, the fixed gear 310 is fixed in a conventional way to fasten using a fastening bolt, the movable gear 320 is a hinge support rib protruding from both sides of the upper surface of the tilt bracket (212). After sandwiching between 212e, the shaft pins 325 can be horizontally rotated to allow up and down rotation.

Particularly important part of the tilt bracket 212 of the present invention is that the guard portion 212d is formed across both sides at a higher position than both the hinge support ribs 212e protruding to install the movable gear 320. The upper surface of one wedge member 330 can be pressed.

As described above, the wedge member 330 and the movable gear 320 which are positioned under the guard portion 212d are operated by the tilt lever 340.

The tilt lever 340 is a hinge that can be rotatably fastened on the tilt bracket 212 by fitting the coupling hole 344 and the hinge bolt 347 into which the connecting protrusion 332 of the wedge member 330 can be fitted. A transverse portion 342 having a hole 343, a handle portion 341 extending from one end of the transverse portion 342, an extension 345 extending from the other end of the transverse portion 342, and this extension portion. At 345, the freezing slope 346 is formed to be inclined to lift the side protrusion 324 of the movable gear 320.

And the tilt lever 340 is fastened by a hinge bolt 347 as shown in Figure 12 can be smoothly rotated.

That is, the hinge bolt 347 is fastened to the hinge hole 343 of the transverse portion 342 of the tilt lever 340 so as to have a hinge point by having a straight portion 347a under the bolt head.

This straight portion 347a is a diameter D larger than the thread diameter of the bolt and a length L larger than the thickness of the transverse portion 342, or the same length and must have positive tolerances. When the hinge bolt 347 is fastened, the transverse portion 342 is not pressed by the bolt head and thus does not receive frictional resistance during rotation.

At this time, the hinge bolt 347 of the present invention may be implemented differently as shown in FIG. That is, in FIG. 13, the expansion hole 222f is formed in the upper half of the screw hole 222e to which the hinge bolt 347 is fastened, and a part of the linear part 347a of the hinge bolt 347 is formed in this expansion hole 222f. In this case, the length L of the straight portion 347a should be the dimension of the sum of the depth d of the expansion hole 222f and the thickness of the transverse portion 342. However, the tolerance should be positive, not negative.

The reason for the fastening in this way is that the flow of the hinge bolt 347 can be prevented as much as possible and the fastening force can be increased.

The tension spring 230 connected between the wedge member 330 and the shroud bracket 213 to pull the wedge member 330 in one direction, and the original position when the tilt lever 340 is rotated. There is a tension spring 230 connected between the tilt lever 340 and the shroud bracket 213 to return to.

Meanwhile, in the present invention, the initial shock absorbing means 400 is provided to fix the column bracket 222 to the vehicle body.

That is, the initial shock absorbing means 400, the capsule 410 is a top plate 411 having a plurality of protrusions 413 to the bottom surface, as shown in Figure 14, and a bottom plate having a plurality of protrusions 413 to the upper surface ( 412, and an elastic portion 414 which integrally connects one side of the upper plate and one side of the lower plate.

In addition, when the upper plate 411 and the lower plate 412 are in parallel with each other, as shown in FIG. 17, the capsule 410 has an end surface of the support 416a and the lower plate of the upper plate 411. There is an arbitrary gap W between the end faces of the support 416b of 412, which is the height of the projections 413 formed on the upper plate 411 and the lower plate 412. It is not formed larger than h).

The gap W prevents the protrusions 413 of the upper plate 411 and the lower plate 412 from collapsing due to the excessive tightening force of the bolt when the fastening bolt is inserted through the bolt hole 415 and fastened to the vehicle body. It is to.

If the fastening force of the fastening bolt is excessively fastened in a state where both the protrusions 413 of the upper plate 411 and the lower plate 412 are collapsed, when the impact occurs, the wing 222a of the capsule 410 and the column bracket 222. Are not separated from each other and do not perform shock absorption.

In addition, the column bracket 222 of the present invention for using the capsule 410 is seating recess for seating the capsule 410 around the slot 222b of the wing portion 222a as shown in FIG. 222c is formed, and the capsule 410 is fitted into the seating recess 222c.

At this time, the mounting recess 222c additionally forms through holes 222d corresponding to the positions of the protrusions 413 of the capsule 410, as shown in FIG. 15, and the protrusion as shown in FIG. 413 may be assembled into a part of the through hole 222d, or may not form the through hole 222d as shown in FIG.

On the other hand, in the present invention, the lower shock absorbing means 500 is provided between the lower tube 221 and the lower mounting bracket 223.

As shown in FIG. 18, the lower tube 221 forms a flat surface 221a at the distal end thereof by reducing the outer diameter, and the low mounting bracket 223 is formed at the distal end of the lower tube. An insertion hole 223a having a straight inner diameter portion 223b is formed to match the cross-sectional shape, and these are assembled together.

Therefore, when the straight inner diameter portion 223b of the insertion hole 223a exits the flat surface 221a and enters the cylindrical portion when the impact occurs along the longitudinal direction of the column, the frictional force is increased, so that the impact can be absorbed by the frictional force. Will be.

In this case, the low mounting bracket 223 may form an inner extension portion 223c that is bent to one side by extending the inner circumference of the insertion hole 223a in order to increase friction as shown in FIG. 19.

In addition, the linear inner diameter portion 223b formed at the distal end surface 221a of the lower tube 221 and the insertion hole 223a of the low mounting bracket 223 may have several pieces at different positions as shown in FIG. 20. You may form in multiple numbers.

This is to maintain some gap so that the initial frictional inertia is not too maximized.

Reference numeral 600 in FIG. 5 is a stopper means for limiting the upper and lower bending ranges of the tilt bracket 212.

The following describes the operation and operating state of the present invention configured as described above.

First, when the driver wants to adjust the angle of the steering wheel, pull the handle portion 341 of the tilt lever 340.

Thus, when the transverse portion 342 of the tilt lever 340 rotates the hinge bolt 347 to the point, the unlocking gradient portion 346 formed in the extension portion 345 of the other end protrudes on the side of the movable gear 320. Push up the side projections 324, and at the same time pull the wedge member 330 coupled to the coupling projections 332 to the coupling hole 344 of the transverse portion 342.

Therefore, the bottom wedge 331 of the wedge member 330 is allowed to lift the movable gear 320 because it is separated from the protrusion 323 of the upper surface of the movable gear 320, the movable gear 320 is lifted Teeth 321 are spaced apart from the teeth 311 of the fixed gear 310.

When the teeth 311 of the fixed gear 310 and the teeth 321 of the movable gear 320 are spaced apart from each other, as shown in FIG. 7, the upper shaft is based on the hinge pin 201 which is a tilt hinge point. The entire upper unit 210 including the 101 and the tilt bracket 212 and the tilt adjusting means 300 may be lifted up and down or rotated down.

As such, when the upper unit is adjusted upward or downward while the tilt lever 340 is pulled up to a desired position, the tilt lever 340 is released in the state.

When the tilt lever 340 is released, the tilt lever 340 returns by the force of the tilt lever return spring 350, and when the tilt lever returns, the transverse portion 342 and the extension portion 345 at the other end are also original. Return to position And this is the operation made because the wedge member 330 is coupled to the coupling projection 332 to the coupling hole 344 of the transverse portion 342 is pulled.

The wedge member 330 is rotated downward by pressing the projection 323 of the upper surface of the movable gear 320 by the wedge portion 331 of the bottom surface, and at the same time the unlocking slope of the retracted extension portion 345 ( 346 allows the side protrusion 324 of the movable gear 320 to descend.

Therefore, the wedge member 330 returned by the spring 350 is inserted into the wedge between the guard portion 212d provided on the upper part of the tilt bracket 212 and the protrusion 323 on the upper surface of the movable gear 320 positioned below the wedge member 330. Since the wedge 331 of the wedge member 330 fitted in this way presses the protrusion 323 of the upper surface of the movable gear 320, the movable gear 320 is pressed down, and the teeth of the movable gear 320 are lowered. Since the mold 321 is engaged with the teeth 311 of the fixed gear 310, the tilting adjustment is completed.

When the impact in the longitudinal direction of the shaft acts on the steering tilt column assembly of the present invention as described above, the initial shock absorbing means 400 is acting primarily, the shock absorbing means 500 at the bottom of the lower tube almost simultaneously Buffer.

First, the initial shock absorbing means 400 is removed from the capsule 410 fixed to the vehicle body with bolts while the left and right wing portions 222a of the column bracket 222 bear with friction.

That is, since the protrusions 413 protruding inward from the upper plate 411 and the lower plate 412 of the capsule 410 are fastened in a state just before being fully pressed, the shock is absorbed by the frictional force of the protrusions. As shown in Fig. 15, when a part of the protrusions 413 is fitted in the through hole 222d, the initial shock absorbing force is large because the friction force is larger.

Further, in the lower shock absorbing means 500, the straight inner diameter portion 223b of the insertion hole 223a of the low mounting bracket 223 is pressed against the flat surface 221a of the distal end of the lower tube 221. When generated, the straight inner diameter portion 223b of the insertion hole 223a moves out of the flat surface 221a to the cylindrical portion, and thus, shock absorption can be made because the outer diameter needs to be overcome.

The present invention as described in detail above has provided a wedge member capable of pressing the movable gear on the upper part of the tilt bracket, and a guard part capable of pressing the wedge member so that the fixed gear interlocked to maintain any tilting state as it is. It is possible to maintain the engagement state of the movable gear in a more solid engagement state, and to go further, it is possible to further increase the safety of the tilting state.

In addition, since the upward rotation operation of the movable gear has been improved to be directly operated by the tilt lever, it is possible to exclude a component called a conventional rotational member, thereby increasing the productivity and lowering the manufacturing cost.

In addition, when the tilt lever is rotatably fastened, since the bolt of the hinge hinge bolt is used as the straight part, the clamping force of the bolt does not affect the rotational friction of the transverse part when the tilt lever is rotated. Noise or loosening of bolts may be prevented.

In addition, since the material of the initial shock absorbing means capsule is made of a metal material without the addition of synthetic resin material and is improved to a structure having protrusions, it is easy to manufacture and inexpensive, and the initial shock absorption is possible only by the friction force between the capsule and the mounting bracket. There is an advantage.

In addition, in the present invention, the coupling structure of the lower end of the column and the low bracket has been improved to have a cross-section having a reduced diameter, and the lower bracket is inserted below the lower tube as in the prior art because it can be directly fastened to the vehicle body through the low bracket. It is to have the advantage that can provide a shock absorbing means without a separate inner tube.

Claims (10)

Each of the lower and upper ends includes a steering shaft 100 including an upper shaft 101 and a lower shaft 102 connected to the universal joint 103, and the above-described steering shaft 100, but including an upper shaft 101. The upper unit 210 formed of an upper tube 211 wrapped around the upper tube, a tilt bracket 212 connected to the upper tube, a shroud bracket 213 for fixing them to the vehicle body, and the lower shaft 102 described above. A column bracket 222 having a lower tube 221 wrapped around the circumference, a capsule assembly slot 222b at left and right wing portions 222a connected to an upper end of the lower tube, and the lower tube 221. Preparing a lower unit 220 consisting of a low mounting bracket 223 for fixing the lower end of the vehicle body, hinge pin holes 212b provided at both left and right sides of the tilt bracket 212 and the column bracket ( Hin on the left and right sides of 222) By combining the pin holes 212b with the hinge pins 201, the upper unit 210 including the upper shaft 101 is connected to the lower unit 220 including the lower shaft 102. In the steering column 200 which can be bent at a predetermined angle to 201), Between the column bracket 222 and the tilt bracket 212 to provide a tilting control means 300 including a fixed gear 310 and a movable gear 320, The tilting control means 300 is fixed to the upper surface of the column bracket 222, the fixed gear 310 having a teeth 311 on the upper surface thereof, The teeth 321 of the bottom surface is to be engaged with the teeth of the fixed gear, a projection 323 is formed on the upper surface, and the movable gear 320 is rotatable on the tilt bracket (212), A wedge member 330 having a wedge portion 331 at a bottom thereof so as to press the protrusion 323 of the movable gear 320 and a connection protrusion 332 at a bottom end thereof; The hinge hole 343 which can be rotatably fastened on the tilt bracket 212 by fitting the coupling hole 344 and the hinge bolt 347 into which the connecting protrusion 332 of the wedge member 330 can be fitted. The side cross section 342, the handle portion 341 extending from one side end of the cross section 342, the side projection 324 of the movable gear 320 is lifted while extending from the other end of the cross section 342. A tilt lever 340 formed of an extension part 345 having a unlocking gradient part 346 so that A spring 350 for pulling the wedge member 330 and the tilt lever 340 in one direction; When the tilt lever 340 is rotated, the steering tilt column assembly for a vehicle comprising a tension spring (230) for returning to its original position. The method of claim 1, The tilt bracket (212) is a steering tilt column assembly for a vehicle, characterized in that it is provided with a lateral guard portion (212d) that can be pressed down on the upper surface of the wedge member (330) on the upper side. The method of claim 1, The hinge bolt 347 is fastened to the hinge hole 343 for the tilt lever 340, but the length L of the dimension larger than the thickness of the transverse portion 342 of the tilt lever 340, and than the screw portion Steering column assembly for automobiles, characterized in that the straight portion (347a) of a larger diameter (D) is formed so that there is no frictional resistance to rotation during rotation of the tilt lever (340). The method of claim 1, The column bracket 222 is assembled by inserting the capsule 410 into the slot 222b of the wing portion 222a formed at both left and right sides thereof, and then fastening to the vehicle body to constitute the initial shock absorbing means 400. But The capsule 410 has a bottom plate 411 having a plurality of protrusions 413 on the bottom surface, a bottom plate 412 having a plurality of protrusions 413 on the top surface, one side of the top plate and one side of the bottom plate. Steering column assembly for a vehicle, characterized in that consisting of an elastic portion 414 connected to each other integrally. The method of claim 4, wherein The column bracket 222 forms a seating recess 222c for seating the capsule 410 around the slot 222b, and a protrusion 413 of the capsule 410 in the seating recess 222c. The steering tilt column assembly for automobiles, characterized in that the through holes (222d) corresponding to the positions are formed. The method of claim 4, wherein The capsule 410 forms an elliptical bolt hole 415 in the center of the upper plate 411, and extends the inner circumference of the bolt hole 415 downward so as to be the upper support 416 a, and the lower plate ( An elliptical bolt hole 415 is formed in the center of the 412, but the inner periphery of the bolt hole 415 is extended upward so as to be the lower support 416b, and thus the upper and lower support 416b described above. Steering tilt column assembly for a vehicle, characterized in that the gap between the upper plate 411 and the lower plate 412 is not in close contact. The method of claim 6, When the upper plate 411 and the lower plate 412 are in parallel with each other, the capsule 410 has an end surface of the support 416a of the upper plate 411 and the support 416b of the lower plate 412. Steering tilt column assembly for a vehicle, characterized in that the interval (W) between the end surface of the) is not greater than the height (h) of the projections (413) formed in the upper plate (411) and the lower plate (412). The method of claim 1, While providing the shock absorbing means 500 between the lower tube 221 and the low mounting bracket 223, the lower tube 221 is made of a single material, the flat surface by the reduction of the outer diameter at its distal end 221a, and the low mounting bracket 223 forms an insertion hole 223a having a straight inner diameter portion 223b so as to match the cross-sectional shape of the distal end portion where the flat surface of the lower tube is formed. The steering tilt column assembly for automobiles, wherein the linear inner diameter portion 223b of the insertion hole 223a leaves the flat surface 221a to increase the frictional force to absorb the shock when assembled. The method of claim 8, The flat inner diameter portion 223b formed at the distal end surface 221a of the lower tube 221 and the insertion hole 223a of the low mounting bracket 223 has a position corresponding to each other and is formed in plural. Automotive steering tilt column assembly. The method of claim 8, The low mounting bracket 223 forms an insertion hole 223a, but an inner extension part 223c extending to one side at an inner circumference of the insertion hole 223a to increase frictional force. Automotive steering tilt column assembly.

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