KR102612219B1 - Rail stowable electric column - Google Patents

Abstract

Rail Store has a rail-type telescopic drive structure that moves the entire steering column assembly in the axial direction to secure structural rigidity as well as secure the telescopic amount of the steering column according to the needs of the development of autonomous driving technology to secure space for the driver. A electric column is provided.
For this purpose, the rail stable electric column according to the present invention includes a rail base installed on the vehicle body, a steering column slidably installed on the rail base in the axial direction, and a drive that provides driving force to slide the steering column in the axial direction. and means, wherein fixed rails are installed long in the axial direction on both sides of the rail base, and are supported on the fixed rails on both sides of the steering column, respectively, so that the steering column slides in the axial direction by the driving force of the driving means. A moving rail that moves in the axial direction is installed, and an adjusting block is installed between the fixed rail and the moving rail to prevent clearance of the moving rail against the fixed rail.

Description

Rail stowable electric column {RAIL STOWABLE ELECTRIC COLUMN}

The present invention relates to a rail stoble electric column, and more specifically, to a rail stoble electric column that can have structural stability while ensuring an increase in the amount of steering column.

In general, the steering device of a car is a device that changes the direction of travel of the car according to the driver's will. It is a device that turns the left and right wheels of the car to the left or right, allowing the car to move in the direction desired by the driver.

In this steering device, the steering force generated by the driver operating the steering wheel is transmitted to the rack-and-pinion mechanism at the bottom through the steering shaft and ultimately changes the direction of both wheels.

Meanwhile, the steering device includes telescope and tilt functions, which allow the driver to adjust the protrusion and tilt angle of the steering wheel to suit his or her height or body type, thereby ensuring smooth steering operation. can do.

In addition, the telescope and tilt functions were initially manual operation methods in which the driver had to directly operate the control lever to move the steering wheel in the axial direction or rotate the steering wheel around the hinge axis, but later, automatic operation using a motor was used. A method has been developed.

In Republic of Korea Patent Publication No. 10-2018-0112231 (published on October 12, 2018) (hereinafter referred to as 'prior art'), 'electric steering column device for automobiles', which is an automatic operation method using the motor, is disclosed. there is.

The prior art includes a housing in the form of a hollow pipe, a telescopic pipe inserted into the inner diameter of the housing, and a steering shaft inserted into the telescopic pipe. A steering wheel is connected to the steering shaft, and the telescopic pipe is moved in the axial direction by a driving device installed in the housing to perform the telescopic function.

Meanwhile, with the recent rapid development of autonomous vehicles, securing space for drivers in autonomous driving mode is emerging as a hot topic. However, since the prior art performs the telescopic function only by moving the telescopic pipe in the axial direction, there is a problem in that it is difficult to secure space for the driver due to the small amount of telescope.

Republic of Korea Patent Publication No. 10-2018-0112231 (published on October 12, 2018)

The problem that the present invention aims to solve is a rail method that moves the entire steering column assembly in the axial direction and secures structural rigidity along with securing the telescopic amount of the steering column according to the driver's space in accordance with the needs of the development of autonomous driving technology. The aim is to provide a rail-stable electric column with a telescopic drive structure.

The object of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above problem, the rail stable electric column according to the present invention includes a rail base installed on the vehicle body, a steering column slidably installed on the rail base in the axial direction, and a driving force that slides the steering column in the axial direction. It includes a driving means that provides, and long fixed rails are installed on both sides of the rail base in the axial direction, and each side of the steering column is supported by the fixed rails so that the steering column is moved by the driving force of the driving means. A movable rail that moves in the axial direction when slid in the axial direction is installed, and an adjust block is installed between the fixed rail and the movable rail to prevent clearance of the movable rail against the fixed rail.

Here, the fixed rail has a central tip protruding outward, an upper inclined surface forming an upper part based on the tip, and an upper inclined surface inclined upward in the inward direction, and a lower part formed based on the tip. The outer lower surface includes a lower inclined surface inclined downward in the inward direction, and the adjust block is formed to surround the front end, the upper inclined surface, and the lower inclined surface of the fixed rail among the moving rails from the outside. It can be arranged to be movable toward the fixed rail in the provided fitting groove.

In addition, the movable rail is seated on the upper inclined surface of the fixed rail via a slide guide plate, and the adjust block is in close contact with the lower inclined surface of the fixed rail via the slide guide plate, and the adjust block This can be moved to the fixed rail side to prevent the clearance.

Additionally, an adjust bolt that moves the adjust block within the fitting groove may be installed on the moving rail.

In addition, the adjust bolt is installed through a bolt installation hole formed to penetrate the moving rail, and the tip may be in contact with the adjust block via a conical spring.

In addition, the driving means is a gearbox installed on the steering column, inside which a worm gear and a worm wheel gear whose outer peripheral surface meshes with the worm gear are rotatably disposed, installed on the gearbox, and the worm gear coupled to a rotating shaft. A drive motor, installed to be long in the axial direction on the rail base, penetrating the worm wheel gear and the gear box, and comprising a screw bar having threads formed on the outer peripheral surface that engage with threads formed on the inner peripheral surface of the worm wheel gear, and driving the drive motor. At this time, the worm wheel gear rotates and moves along the length of the screw bar together with the gearbox, so that the steering column can slide in the axial direction.

Additionally, the rotation axis of the drive motor and the screw bar may be arranged at right angles to each other.

Additionally, the gearbox may be placed close to one of the fixed rails installed on both sides of the rail base, and the drive motor may be placed close to another one of the fixed rails installed on both sides of the rail base.

Additionally, one end of the screw bar may be hinged to the rail base.

The rail stable electric column according to the present invention can secure the tele volume by moving the entire steering column assembly in the axial direction, and has a rail-type drive mechanism and fastening structure, so it has an excellent advantage in rigidity and assembly structure. It has the effect of simplifying and increasing productivity.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a tele-out state of a rail stable electric column according to an embodiment of the present invention;
Figure 2 is a perspective view showing the tele-in state of a rail stable electric column according to an embodiment of the present invention;
Figure 3 is a front view of a rail stable electric column according to an embodiment of the present invention;
Figure 4 is a perspective view showing Figure 1 excluding the rail base;
Figure 5 is an exploded perspective view showing the driving means shown in Figure 4;
Figure 6 is a perspective view showing the internal structure of the gearbox shown in Figure 5;
Figure 7 is an exploded perspective view showing the fixed rail and moving rail shown in Figure 3;
FIG. 8 is a longitudinal cross-sectional view showing the fixed rail, moving rail, and slide guide plate shown in FIG. 3.

Hereinafter, a rail stable electric column according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a perspective view showing a tele-out state of a rail-stable electric column according to an embodiment of the present invention, and Figure 2 is a perspective view showing a tele-in state of a rail-stable electric column according to an embodiment of the present invention. Here, Tele Out may mean that the axial length of the entire rail stoble electric column (1) is lengthened, and Tele In may mean that the entire axial length of the rail stoble electric column (1) is lengthened. This may mean that the length of the direction becomes shorter. In the following description, the meaning of Tele may mean movement in the axial direction.

Referring to Figures 1 and 2, the rail stable electric column 1 according to an embodiment of the present invention may include a rail base 100 and a steering column assembly 200.

The rail stoble electric column 1 can secure the amount of tele by sliding the entire steering column assembly 200 in the axial direction on the rail base 100.

The rail base 100 is a plate-shaped metal member that can be fixedly installed on the vehicle body, and the steering column assembly 200 can be placed on the lower side of the rail base 100. The steering column assembly 200 may be installed on the rail base 100 to be slidable in the axial direction. The power column 1 can be tele-out or tele-in by the steering column assembly 200 sliding axially relative to the rail base 100.

Of course, the steering column assembly 200 may itself include a component capable of performing tele-out and tele-in functions. Specifically, the steering column assembly 200 may include a steering shaft 210, a steering housing 220, and a steering column 230.

The configuration of the steering column assembly 200 will be described in more detail as follows.

A steering wheel (not shown), which the driver holds with his hands to steer the direction of travel of the car, may be installed on one end of the steering shaft 210.

The steering housing 220 may be formed in a cylindrical shape into which the other end of the steering shaft 210 is inserted. The steering housing 220 may include an inner tube 221 and an outer tube 222. The other end of the steering shaft 210 may be inserted into the inner tube 221 and protrude out of the inner tube 221 through one end of the inner tube 221. The other end of the inner tube 221 may be inserted into the outer tube 222, and may be disposed to protrude out of the outer tube 222 through one end of the outer tube 222.

The steering shaft 210 may be locked to the inner tube 221 so as not to move in the axial direction. The steering shaft 210 may be rotatably coupled to the inner tube 221 in the circumferential direction through a ball bearing.

The inner tube 221 may be locked to the outer tube 222 so that it does not move in the axial direction or rotate in the circumferential direction. In the event of a car crash, the inner tube 221 is unlocked with respect to the outer tube 222 due to the collision force applied to the steering column assembly 200 and is inserted into the outer tube 222, preventing injury to the driver. It can be prevented.

The outer tube 222 may be installed on the steering column 230 to be slidable in the axial direction.

The steering column 230 may support the load of the steering column assembly 200. That is, the steering column assembly 200 includes a steering shaft 210, a steering housing 220, and a steering column 230. The steering column assembly excluding the steering column 230 ( The steering column 230 can support the load of 200).

The steering column 230 may be installed to slide in the axial direction on the rail base 100. A guide hole 130 may be formed in the rail base 100 to be long in the axial direction between the fixed rails 110 on both sides. The guide hole 130 may be formed in the center between the fixed rails 110 on both sides.

A guider 233 may be formed to protrude between the moving rails 250 on both sides of the steering column 230. The guider 233 may be formed to protrude on the side of the steering column 230 facing the rail base 100. The guider 233 may be formed in the center between the moving rails 250 on both sides. The guider 233 may be capable of sliding in the axial direction through the guide hole 130 formed in the rail base 100. A ball bearing 235 may be installed at the end of the guider 233 to protrude in a direction perpendicular to the axial direction and supported on the rail base 100.

The ball bearing 235 may be formed as a typical ball bearing structure in which a plurality of balls are provided between an inner ring and an outer ring, and the outer ring can rotate relative to the inner ring. The inner ring of the ball bearing 235 can be fixedly installed at the end of the guider 233 through a bolt, and the outer ring of the ball bearing 235 is placed in contact with the surface of the rail base 100, so that the steering column 230 is a driving means. When it slides in the axial direction by the driving force of 300, it can be rotated and moved in the axial direction while being supported on the surface of the rail base 100.

The steering column 230 can support a load in a horizontal direction perpendicular to the axial direction by the guider 233, and can support a load in a vertical direction perpendicular to the axial direction by the ball bearing 235 installed in the guider 233. Loads can be supported in either direction.

The tilt drive unit 240 includes a gearbox 241 fixedly installed on the steering column 230, a motor 242 fixedly installed on the gearbox 241, and rotatable in the circumferential direction on the gearbox 241. It includes a screw bar 243, a nut installation bracket 244 fixed to the outer tube 222, and a nut member 245 installed on the nut installation bracket 244.

The rotation axis of the motor 242 may be arranged in the same axial direction as the screw bar 243. The nut member 245 may have threads formed on its inner peripheral surface, and the threads formed on its inner peripheral surface may engage with the threads formed on its outer peripheral surface of the screw bar 243. Inside the gearbox 241, a worm gear and a worm wheel gear may be rotatably disposed. Here, the worm gear may be coupled to the rotation shaft of the motor 242, and the worm wheel gear may be meshed with the worm gear. Additionally, a screw bar 243 may be coupled to the center of the worm wheel gear. Therefore, when the motor 242 is driven, the screw bar 243 can be rotated in the circumferential direction, and the nut member 245 is moved in the axial direction, which is the longitudinal direction of the screw bar 243, thereby rotating the steering column. The assembly 200 itself can perform a tilt function.

Hereinafter, the configuration for the tele function of the entire steering column assembly 200 using the driving force of the driving means 300 will be described in detail with reference to FIGS. 3 to 8.

Figure 3 is a front view of a rail stable electric column according to an embodiment of the present invention.

Referring to FIGS. 1 to 3 , fixed rails 110 may be installed on both sides of the rail base 100 to be long in the axial direction. The fixed rail 110 is fastened to the rail base 100 through a plurality of bolts, and can be fixedly arranged to be long in the axial direction on both sides of the rail base 100. The fixed rail 110 may be formed in a plate shape bent multiple times, and the side facing the side of the steering column 230 may be open.

Moving rails 250 may be installed on both sides of the steering column 230, respectively. The moving rail 230 is supported on the fixed rail 110 and can be moved in the axial direction when the steering column 230 slides in the axial direction by the driving force of the driving means 300.

When the steering column 230 slides in the axial direction by the driving force of the driving means 300, the moving rail 250 moves in the axial direction along the fixed rail 110, so that the telescopic sight of the electric column 1 Noise during operation can be reduced, the assembly rigidity of the electric column (1) can be improved, and the tele quantity can be controlled stably.

FIG. 4 is a perspective view of FIG. 1 excluding the rail base, FIG. 5 is an exploded perspective view of the driving means shown in FIG. 4, and FIG. 6 is a perspective view of the internal structure of the gearbox shown in FIG. 5.

Referring to FIGS. 1 and 2 and FIGS. 4 to 6 , the driving means 300 may provide driving force to slide the steering column 230 in the axial direction. That is, by the driving force of the driving means 300, the electric column 1 can be in a tele-out state as shown in FIG. 1 or in a tele-in state as shown in FIG. 2.

The driving means 300 may be composed of a gearbox 310, a driving motor 320, and a screw bar 330. The gearbox 310 and the drive motor 320 may be disposed on the side of the steering column 230 facing the rail base 100. The gearbox 310 may be installed on the steering column 310, and the drive motor 320 may be installed on the gearbox 310. The screw bar 330 may be installed long in the axial direction on the rail base 100. The rotation axis 321 of the drive motor 320 and the screw bar 330 may be arranged perpendicular to each other. That is, the rotation axis 321 of the drive motor 320 may be arranged long in a direction perpendicular to the axial direction.

The gearbox 310 may be fastened to the steering column 230 through a plurality of bolts. Gearbox 310 may include a box base 311 and a box cover 312. The box base 311 may form the lower part of the gearbox 310, and the box cover 312 may form the upper part of the gearbox 310. The box base 311 may be fastened to the box base 311 through a plurality of bolts, and the box cover 312 may be fastened to the box base 311 through a plurality of bolts. The box base 311 and the box cover 312 may be combined with each other to form an internal space.

Inside the gearbox 310, a worm gear 313 and a worm wheel gear 314 may be rotatably disposed. The worm gear 313 and the whim wheel gear 314 may be meshed with each other. The outer peripheral surface of the worm wheel gear 314 may be engaged with the outer peripheral surface of the worm gear 313.

The drive motor 320 may be fastened to the gearbox 310 through a plurality of bolts. A worm gear 313 may be coupled to the rotation shaft 321 of the drive motor 320. Therefore, when the drive motor 320 is driven and the rotation shaft 321 of the drive motor 320 rotates, the worm gear 313 and the worm wheel gear 314 may rotate.

The screw bar 330 may be formed as a straight bar with a circular cross-section and straight in the axial direction. The screw bar 330 may penetrate the worm wheel gear 314 and the gearbox 310. A hole through which the screw bar 330 passes may be formed in each of the center of the worm wheel gear 314 and the box cover 312 of the gearbox 310. On the outer peripheral surface of the screw bar 330, the screw bar 330 may be formed with a thread that engages with the thread formed on the inner peripheral surface of the worm wheel gear 314. Therefore, when the drive motor 320 is driven, the worm wheel gear 314 rotates and moves along the length of the screw bar 330 along with the gearbox 310, so the steering column 230 slides in the axial direction. The moving rail 250 can be moved in the axial direction while being supported on the fixed rail 110.

The gearbox 310 is installed on the rail base 100 at a portion where the screw bar 330 is installed so that the gearbox 310 can be moved along the length of the screw bar 330 by the driving force of the drive motor 320. It is desirable to create a space in which to move.

Since the gearbox 310 and the worm wheel gear 314 are moved while surrounding the outer peripheral surface of the screw bar 330, the steering column 230 is not shaken in any direction perpendicular to the axial direction. Accordingly, the movable rails 250 on both sides can move smoothly along the length of the fixed rails 110 on both sides and no noise is generated.

The gearbox 310 can be placed close to one of the fixed rails 110 installed on both sides of the rail base 100, and the drive motor 320 is a fixed rail installed on both sides of the rail base 100 ( 110) can be placed close to another one.

Specifically, the gearbox 310 may be disposed between one of the moving rails 250 on both sides and the guider 233, and the drive motor 320 may be disposed between the other one of the moving rails 250 on both sides and the guider ( 233).

Therefore, the load of the gearbox 310 and the load of the drive motor 320 can be evenly distributed on the moving rails 250 installed on both sides of the steering column 230, and the moving rails 250 on both sides are fixed to the two sides. It can be moved smoothly along the length of the rail 110 and no noise is generated.

One end of the screw bar 330 may be hinged to the rail base 100. Specifically, hinge protrusions 331 may be formed to protrude on both sides of one end of the screw bar 330, and bushes 332 may be installed on the outer peripheral surface of each hinge protrusion 331. Each bush 332 is formed in a cylindrical shape so that each hinge protrusion 331 can be inserted into each bush 332. Each bush 332 can be rotatably inserted into a pair of bush brackets 333, and each bush bracket 333 can be fixed to the rail base 100 through a bolt.

In this way, since one end of the screw bar 330 is hinged to the rail base 100, the gearbox 310 and the worm wheel gear 314 are connected to the screw bar 330 by the driving force of the drive motor 320. When moved along the length, the screw bar 330 rotates slightly around each hinge protrusion 331, so the gearbox 310 and worm wheel gear 314 can be moved smoothly and no noise is generated. It may not be possible.

Here, each bush 332 prevents each hinge protrusion 331 from directly rubbing against each bush bracket 333, so that the screw bar 330 slightly rotates each hinge protrusion 331 about the center of rotation. When rotated, the rotation of the screw bar 330 can be smoothed and noise can be prevented.

FIG. 7 is an exploded perspective view showing the fixed rail, moving rail, and slide guide plate shown in FIG. 3, and FIG. 8 is a longitudinal cross-sectional view showing the fixed rail, moving rail, and slide guide plate shown in FIG. 3.

Referring to FIGS. 4, 7, and 8, fixed rails 110 are installed long in the axial direction on both sides of the rail base 100, and each side of the steering column 230 is supported by fixed rails 110. When the steering column 230 slides in the axial direction by the driving force of the driving means 300, a moving rail 250 that moves in the axial direction may be installed.

Here, an adjust block 270 may be provided between the fixed rail 110 and the moving rail 250. The adjust block 270 may be configured to adjust the binding force of the movable rail 250 to the fixed rail 110. The binding force of the movable rail 250 to the fixed rail 110 has the same meaning as preventing the gap between the lower guide plate 262 and the fixed rail 110 in the configuration of the slide guide plate 260, which will be described later.

More specifically, as shown in FIG. 7, the fixing rail 110 has a center tip 111 protruding outward, and the outer upper surface forming the upper portion with respect to the tip 111 extends inward. The outer lower surface forming the lower portion based on the upper inclined surface 112 and the distal end 111 may include an upper inclined surface 112 that is inclined upward and a lower inclined surface 113 that is inclined downward in the inward direction.

As shown in FIGS. 7 and 8, the movable rail 250 has a fitting groove 255 that surrounds the front end 111, the upper inclined surface 112, and the lower inclined surface 113 of the fixed rail 110 from the outside. ) can be provided. One end of the moving rail 250 is fixed to the steering column 230 side by a fastening member such as a bolt, so that it can slide in the axial direction together with the steering column 230.

In the above-described fitting groove 255, which is the space between the moving rail 250 and the lower inclined surface 113 of the fixed rail 110, the above-described adjust block 270 is provided, as shown in FIGS. 7 and 8. ) can be placed.

The adjust block 270 is an adjust bolt 290 whose tip is in contact with the bolt installation hole 251 of the bolt installation end 252 provided at the outer end of the moving rail 250. ) can be provided to be movable within the fitting groove 255.

More specifically, referring to FIG. 7, the adjust block 270 is formed with an inclined surface parallel to the lower inclined surface 113 of the fixed rail 110, and is positioned on the lower inclined surface 113 of the fixed rail 110. The supported support block 271 is formed integrally with the support block 271, and the bolt contacts the inside of the bolt installation end 252 provided in a hollow shape at the outer end of the moving rail 250. It may include block 272.

At this time, the tip of the adjust bolt 290 touches the outer surface of the bolt contact block 272 of the adjust block 270 via the conical spring 280 interposed between the adjust block 270 and the adjust bolt 290. It can be elastically supported on the fixed rail 110 side.

Here, the upper inclined surface (not shown) of the fitting groove 255 formed by the moving rail 250, the upper inclined surface 112 of the fixed rail 110, and the support block 271 of the adjusting block 270 A slide guide plate 260 may be provided between the inclined surface and the lower inclined surface 113 of the fixed rail 110, respectively.

More specifically, the slide guide plate 260 is coupled to the upper inclined surface of the fitting groove 255 of the moving rail 250, and the external exposed surface is directly connected to the upper inclined surface 112 of the fixed rail 110. It is coupled to the upper guide plate 261, which is seated in contact, and the inclined surface of the support block 271 among the adjust blocks 270, which are fitted on the lower side of the fitting groove 255 of the moving rail 250, and are exposed to the outside. It may include a lower guide plate 262 whose surface is in close contact with the lower inclined surface 113 of the fixed rail 110.

A plurality of upper fixing protrusions 263 are formed to protrude outward on the upper guide plate 261, and as shown in FIGS. 7 and 8, they are located on the upper inclined surface of the matching groove 255 of the moving rail 250. A plurality of upper fixing protrusions 263 may be inserted and fixed into a plurality of fixing holes 253 formed to penetrate the outer surface.

At this time, although not shown, the upper guide plate 261 can be firmly fixed to the moving rail 250 by allowing the fastening member to be fastened to each of the plurality of upper fixing protrusions 263 through the plurality of fixing holes 253. . However, it is not necessary to use a plurality of fastening members to couple the upper guide plate 261 to the moving rail 250, and a plurality of upper fixing protrusions 263 are press-fitted into the plurality of fixing holes 253. Of course it can be done.

The upper guide plate 261 may be an intermediate component that substantially adds the entire load of the steering column assembly 200 to the fixed rail 110.

A plurality of lower fixing protrusions 264 are formed on the lower guide plate 262 to protrude outward, and as shown in FIGS. 7 and 8, grooves are formed on the inclined surface of the support block 271 among the adjust blocks 270. A plurality of lower fixing protrusions 264 may be inserted and fixed into the plurality of fixing grooves 274 machined into the shape. At this time, the lower guide plate 262 may couple the plurality of lower fixing protrusions 264 to the plurality of fixing grooves 274 using an interference fit method.

The lower guide plate 262, together with the upper guide plate 261, may be an intermediate component that distributes the entire load of the steering column assembly 200 to the fixed rail 110.

Since this type of slide guide plate 260 is configured to increase wear due to constant contact with the upper inclined surface 112 and lower inclined surface 113 of the fixed rail 110, it has wear resistance like polyacetal resin. It is preferable that it is formed from an excellent synthetic material.

In addition, ideally, the condition for distributing the entire load of the steering column assembly 200 to the fixed rail 110 using the slide guide plate 260 is that the lower guide plate 262 is attached to the fixed rail 110. It is desirable to maintain direct contact with the lower inclined surface 113.

However, among the upper guide plate 261 and the lower guide plate 262, the upper guide plate 261 is the component that substantially supports the entire load of the steering column assembly 200, while the upper guide plate 261 is a lower guide plate. Compared to the plate 262, wear occurs more easily depending on the frequency of use, and when a certain amount of wear occurs on the upper guide plate 261, the lower guide plate 262 is exposed to the lower inclined surface 113 of the fixed rail 110. There is a gap from the load distribution function, and once the load distribution function by the lower guide plate 262 disappears, it leads to the problem that the upper guide plate 261 wears faster.

Here, the stoble electric column 1 according to an embodiment of the present invention has the above-described configuration so that the user can adjust it to prevent clearance against the lower inclined surface 113 of the lower guide plate 262 and the fixed rail 110. It may include an adjust block 270 and an adjust bolt 290.

Although not shown, a male thread is machined on the outer peripheral surface of the adjust bolt 290, and a female thread is meshed with the male thread of the adjust bolt 290 on the inner peripheral surface of the bolt installation hole 251 where the adjust bolt 290 is coupled. Acid may be formed during processing.

If there is a possibility that the lower guide plate 262 may be spaced from the lower inclined surface 113 of the fixed rail 110 due to certain wear of the upper guide plate 261, the user may place a spacer on the outer center of the adjust bolt 290. Rotate the adjust bolt 290 in the formed wrench groove 291 using a tool such as a hexagon wrench or square wrench, and insert the adjust block 270 into the fitting groove 255 through the conical spring 280. By moving it to the side of the fixed rail 110, the externally exposed surface of the lower guide plate 262 is brought into close contact with the lower inclined surface 113 of the fixed rail 110 to eliminate clearance, thereby steering together with the upper guide plate 261. The entire load of the column assembly 200 can be distributed.

Here, the conical spring 280 always elastically supports the adjust block 270 toward the fixed rail 110 within a predetermined elastic range, so that even when fine wear of the upper guide plate 261 occurs, it remains within the predetermined wear range. There is no need for the user to make separate clearance adjustments. If the upper guide plate 261 is worn to the extent that the elastic force of the conical spring 280 is not exerted, it is enough for the user to adjust the clearance using the adjust bolt 290 as described above.

As described above, the rail stable electric column 1 according to an embodiment of the present invention can secure the tele volume by moving the entire steering column assembly 200 in the axial direction, and has a rail-type drive mechanism and fastening structure. Because it has an excellent advantage in rigidity, it can simplify the assembly structure and thereby increase productivity.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

1: Rail stable electric column 100: Rail base
110: fixed rail 111: second curved portion
112: third inclined surface portion 113: fourth inclined surface portion
114: first groove 115: second groove
130: Guide hole 230: Steering column
233: guider 235: ball bearing
250: moving rail 251: bolt installation hole
252: Bolt installation end 253: Multiple fixing holes
255: Fitting groove 260: Slide guide plate
261: upper guide plate 262: lower guide plate
263: upper fixing protrusion 264: lower fixing protrusion
270: Adjustment block 271: Support block
272: bolt contact block 280: conical spring
290: Adjust bolt 291: Wrench groove
300: driving means 310: gearbox
313: worm gear 314: worm wheel gear
320: Drive motor 321: Rotation shaft of drive motor
330: screw bar

Claims (9)

Rail base installed on the car body;
a steering column slidably installed on the rail base in the axial direction; and
It includes a driving means that provides a driving force to slide the steering column in the axial direction,
Long fixed rails are installed on both sides of the rail base in the axial direction. The fixed rails have a center end that protrudes outward, and an outer upper surface forming an upper part with respect to the front end slopes upward in the inward direction. It includes an upper inclined surface provided in the form of an upper inclined surface and a lower inclined surface where the outer lower surface forming the lower portion with respect to the distal end is inclined downward in the inward direction,
Moving rails are installed on both sides of the steering column, which are supported on the fixed rails and move in the axial direction when the steering column slides in the axial direction by the driving force of the driving means,
An adjusting block is installed between the fixed rail and the movable rail to prevent clearance of the movable rail against the fixed rail,
The adjust block is arranged in close contact with the lower inclined surface via a lower guide plate among the slide guide plates. In claim 1,
The adjust block is disposed to be movable toward the fixed rail in a fitting groove provided in a form surrounding the front end, the upper inclined surface, and the lower inclined surface of the fixed rail among the moving rails from the outside. A rail stable electric column. In claim 2,
The moving rail is seated on the upper inclined surface of the fixed rail via a slide guide plate,
A rail stable electric column in which the adjust block is moved to the fixed rail side to prevent the clearance. In claim 2,
A rail stable electric column in which an adjust bolt for moving the adjust block within the fitting groove is installed on the moving rail. In claim 4,
The adjust bolt is installed through a bolt installation hole formed to penetrate the moving rail, and the tip contacts the adjust block via a conical spring. In claim 1,
The driving means is,
A gearbox installed on the steering column, inside which a worm gear and a worm wheel gear whose outer peripheral surface meshes with the worm gear are rotatably disposed;
A drive motor installed in the gearbox and coupled to the worm gear to a rotating shaft;
a screw bar installed on the rail base to extend in the axial direction, penetrating the worm wheel gear and the gear box, and having threads formed on the outer peripheral surface that mesh with threads formed on the inner peripheral surface of the worm wheel gear;
When the drive motor is driven, the worm wheel gear rotates and moves along the length of the screw bar together with the gearbox, so that the steering column slides in the axial direction. In claim 6,
A rail stable electric column in which the rotation axis of the drive motor and the screw bar are arranged at right angles to each other. In claim 6,
The gearbox is disposed close to one of the fixed rails installed on both sides of the rail base,
The drive motor is a rail stable electric column disposed close to another one of the fixed rails installed on both sides of the rail base. In claim 6,
A rail stable electric column in which one end of the screw bar is hinged to the rail base.

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