Steering column device of automobile

Abstract

The utility model relates to a steering column device of an automobile, in particular to the steering column device of the automobile, which comprises a main shell, a steering column, a first connecting piece and a second connecting piece, an upper tube interposed between the inner peripheral surface of the main housing and the outer peripheral surface of the steering column and moving in conjunction with the steering column when the steering column extends and retracts; and a guide member that is provided to the main housing and that guides axial movement of the upper tube that moves in conjunction with the steering column. Wherein the guide member includes a telescopic guide, and a lubricant groove space capable of storing a lubricant is formed in a surface of the telescopic guide facing the outer peripheral surface of the upper tube, thereby providing an advantage of preventing the occurrence of impact sound when reverse rotation of the contraction action is performed.

Description

Technical Field

[0001] The utility model relates to a steering column device for an automobile, and more particularly to a steering column device for an automobile in which an upper tube and a steering column are linked to perform telescopic movements so that a telescopic guide continuously supplies lubricant to a guide surface of the upper tube while storing lubricant. Background Art

[0002] Generally, a steering column device is formed to surround a steering column to support the rotation of the steering column, and is coupled to a vehicle body via a bracket to fix the position of the steering column, wherein the steering column transmits the rotational force generated by the driver operating the steering wheel to the rack and pinion mechanism.

[0003] This steering column device can add tilt or telescopic functions for the convenience of the driver. Tilt is used to adjust the fixed angle of the steering wheel, and telescopic means that two hollow tubes are inserted to extend and contract in the direction of the steering column. It also has the function of absorbing impact energy while the steering column collapses in the event of a car collision.

[0004] Figure 1 It is a perspective view and a partially enlarged view showing a steering column device according to the conventional technology.

[0005] According to the prior art, the steering column device includes: a main housing 30, which accommodates the steering column 10 for passage and supports the steering column 10 at a predetermined portion of the vehicle body; an upper tube 20, which is interposed between the inner peripheral surface of the main housing 30 and the outer peripheral surface of the steering column 10, and moves in conjunction with the steering column 10 when the steering column 10 is telescoped.

[0006] Here, if Figure 1 As shown, according to the steering column device 1 of the prior art, when performing the telescopic function, the steering column 10 and the upper tube 20 only extend and contract in the longitudinal direction of the steering column 10, but the upper tube 20 rotates in the circumferential direction, so there is a concern that the product reliability may be reduced.

[0007] To prevent this problem, Figure 1 As shown, according to the steering column device 1 of the prior art, a guide slot 50 cut in the length direction is formed in the main housing 30, and a guide component 60 is provided on the outer peripheral surface of the upper tube 20, which protrudes toward the middle of the guide slot 50. The guide component 60 is clamped in the circumferential direction, thereby guiding the upper tube 20 not to rotate, but only to perform linkage and telescopic movements in the length direction along a set path through the guide slot 50.

[0008] In particular, Figure 1 As shown, the guide component 60 includes: a guide bushing 63 made of plastic; and a guide screw 61 for fixing the guide bushing 63 to the outer circumferential surface of the upper tube 20 .

[0009] However, according to the conventional steering column device 1 constructed as described above, the guide bushing 63 in the guide component 60 can prevent the upper tube 20 from rotating arbitrarily in the circumferential direction. However, there is a problem that the plastic guide bushing 63 continuously causes friction on the inner end of the guide slot 50.

[0010] The friction described above often causes a problem in that a knocking sound (unusual noise) is generated when the extension and contraction operations are reversed.

[0011] At the same time, in the steering column device 1 according to the prior art, the guide component 60 interferes with the main housing 30 due to deformation of the guide bushing 63 caused by the tightening force of the guide screw 61, and axial movement becomes difficult frequently. In order to prevent this phenomenon, an additional design of a secondary shape is required to make the guide screw 61 first contact the upper tube 20. Utility Model Content

[0012] (Problem to be solved)

[0013] The present invention is proposed to solve the above-mentioned technical problems and aims to provide a steering column device for an automobile, in which a telescopic guide is arranged to guide the longitudinal movement of the upper tube during the telescopic operation, and lubricant is continuously supplied through the telescopic guide.

[0014] Meanwhile, another object of the present invention is to provide a steering column device for an automobile that can facilitate injection of lubricant into a lubricant groove space formed inside a telescopic guide.

[0015] The subjects of the present invention are not limited to the subjects mentioned above, and other subjects not mentioned can be clearly understood by those skilled in the art from the following description.

[0016] (Methods of solving the problem)

[0017] According to one embodiment of the present invention, a steering column device for an automobile includes: a main shell, which accommodates a steering column for passage and supports the steering column at a predetermined portion of a vehicle body; an upper tube, which is interposed between the inner circumference of the main shell and the outer circumference of the steering column and moves in conjunction with the steering column when the steering column is telescopic; a guide component, which is arranged in the main shell and guides the axial movement of the upper tube that moves in conjunction with the steering column; wherein the guide component includes a telescopic guide, and a lubricant groove space for storing lubricant is formed on the surface of the telescopic guide facing the outer circumference of the upper tube.

[0018] Here, the guide member may further include a fixing nut for fixing the telescopic guide to a mounting hole formed in the main housing.

[0019] In addition, the guide member may further include an elastic member interposed between the fixing nut and the telescopic guide to closely contact the telescopic guide with a guide surface formed on the outer circumferential surface of the upper tube.

[0020] In addition, the fixing nut is formed with an external thread on the outer circumference so as to be threadedly fastened to the internal thread formed on the inner circumference of the mounting hole; the more turns the fixing nut is threadedly engaged with the mounting hole, the greater the adhesion force of the telescopic guide against the outer circumference of the upper tube through the elastic component.

[0021] In addition, in order to threadably engage the fixing nut, the mounting hole is formed to have a circular inner circumferential surface; the telescopic guide is a pair of insertion guide protrusions stuck on the inner circumferential surface of the mounting hole that can be spaced apart from each other to form an integral whole with the frame end of the telescopic guide, so that the fixing nut will not rotate regardless of whether it is threadably engaged.

[0022] In addition, a pair of insertion guide grooves are formed on the inner circumferential surface of the mounting hole, and the pair of insertion guide grooves are placed in the insertion direction of the pair of insertion guide protrusions formed on the telescopic guide; the pair of insertion guide grooves can be formed by cutting internal threads on the inner circumferential surface of the mounting hole, and the internal threads are formed for threaded connection with the fixing nut.

[0023] The telescopic guide may include: a lubricant dispersing rib, which is in close contact with the guide surface of the upper tube; and the lubricant groove space, which is recessed further toward the side where the elastic component is located than the lubricant dispersing rib.

[0024] In addition, the lubricant groove space may be formed in a concave shape so as to partition the lubricant distributing rib at the frame portion of the telescopic guide.

[0025] In addition, the lubricant groove space may be recessed into a straight line to define the lubricant dispersing rib.

[0026] In addition, the lubricant groove space may be recessed to have the same depth surface toward the side where the elastic member is located.

[0027] In addition, the telescopic guide can be recessed at the outer end of the frame to form an injection groove for injecting the lubricant into the inner side of the lubricant groove space.

[0028] In addition, when the upper tube is arranged obliquely, the injection groove may be formed relatively upward in the direction of gravity at the outer end portion of the frame of the telescopic guide.

[0029] In addition, the lubricant distributing rib is formed to extend along the lubrication direction of the upper tube, and a plurality of the lubricant distributing ribs may be formed in a direction perpendicular to the lubrication direction.

[0030] Additionally, the telescopic guide may be made of plastic.

[0031] (Effects of the utility model)

[0032] The steering column device for an automobile according to an embodiment of the present invention can achieve the following various effects.

[0033] First, when the upper tube and the steering column are linked together for telescopic movement, the guide member that guides this movement continuously receives a supply of lubricant, thereby minimizing friction between the guide member and the upper tube.

[0034] Secondly, lubricant can be continuously supplied to the contact surface between the telescopic guide and the upper tube, so the impact sound (abnormal noise) generated when the telescopic action is reversed can be cut off in advance, thereby preventing the product experience quality from deteriorating.

[0035] Third, lubricant can be injected at any time through the outside of the telescopic guide, so there is no need to separate the telescopic guide, which has the effect of improving ease of use and work convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a perspective view and a partially enlarged view showing a steering column device according to the prior art;

[0037] Figure 2 1 is a perspective view showing a steering column device for an automobile according to an embodiment of the present invention;

[0038] Figure 3 yes Figure 2 A downward exploded perspective view of a guide component in a structure and a partially enlarged view thereof;

[0039] Figure 4 yes Figure 2 An upward exploded perspective view of the guide component in the structure;

[0040] Figure 5 yes Figure 3 and Figure 4 Side view of

[0041] Figure 6 yes Figure 2 A cross-sectional view of the structure in which the guide component is passed through;

[0042] Figure 7 yes Figure 3 A cross-sectional view of the structure in which the guide component is passed through;

[0043] Figure 8 It shows Figure 3 and Figure 4 Stereoscopic views of the telescopic guide member in the guide component at various angles;

[0044] Figure 9 It shows Figure 2 An exploded perspective view of the effect of the guide component on the upper tube in the structure.

[0045] (Explanation of Reference Numerals)

[0046] 1: Steering column device 110: Steering column

[0047] 120: Upper tube 121: Guide surface

[0048] 130: Main housing 150: Mounting hole

[0049] 150S: Internal thread 153: Insert guide groove

[0050] 160: Guide component 161: Telescopic guide

[0051] 162: Lubrication portion 162a: Lubricant groove space

[0052] 162b: Lubricant dispersing rib 163: Insertion guide protrusion

[0053] 164: injection groove 165: elastic member

[0054] 167: Fixing nut 167S: External thread

[0055] 168: Tool slot DETAILED DESCRIPTION

[0056] Hereinafter, a steering column device for an automobile according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0057] In assigning reference numerals to components in the various drawings, it should be noted that identical components should be assigned the same reference numerals whenever possible, even if they are shown in different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of a known structure or function is judged to obstruct understanding of the embodiments of the present invention, such detailed description will be omitted.

[0058] When describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. Such terms are only used to distinguish one component from other components and shall not limit the nature or order of the components. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as in the relevant technical articles and shall not be interpreted in an ideal or overly formal sense unless clearly defined in this application.

[0059] Figure 2 1 is a perspective view showing a steering column device for an automobile according to an embodiment of the present invention; Figure 3 and Figure 4 yes Figure 2 A downward exploded perspective view and an upward exploded perspective view of the guide component in the structure; Figure 5 yes Figure 3 and Figure 4 side view.

[0060] like Figures 2 to 5 As shown, the steering column device 100 of an automobile according to an embodiment of the present invention includes: a main shell 130, which accommodates the steering column 110 for passage and supports the steering column 110 at a predetermined portion of the vehicle body; an upper tube 120, which is interposed between the inner circumference of the main shell 130 and the outer circumference of the steering column 110, and moves in conjunction with the steering column 110 when the steering column 110 is telescopic; a guide component 160, which is provided in the main shell 130 and guides the axial movement of the upper tube 120 that moves in conjunction with the steering column 110.

[0061] Here, the main housing 130 is generally made of metal material and extends in the axial direction to accommodate the steering column 110. As described above, it plays the role of intervening in the connection with a predetermined part of the vehicle body, and is also the part that is connected to the telescopic drive motor (not marked with a reference numeral) for performing tilting and telescopic movements.

[0062] On the other hand, as described in the "Background Technology" section, telescoping refers to the function of moving the steering column 110 in the axial direction (length direction) according to the driver's body shape to move the steering wheel closer to the driver's side (extending action) or away from the driver (retracting action).

[0063] A mounting hole 150 for mounting a guide component 160 is formed through the main housing 130. If the lock between the steering column 110 and the upper tube 120 housed inside the main housing 130 is released, the steering column 110 and the upper tube 120 are linked to extend or contract in the axial direction according to the set driver's body shape, and the extension and retraction movement can be guided by the guide component 160.

[0064] On the other hand, a rotating rod (not marked with a reference numeral) and a guide nut (not marked with a reference numeral) for adjusting the telescopic amount of the upper tube 120 are provided on one side of the main shell 130. If the rotating rod rotates, the guide nut fixed to the upper tube 120 moves while the upper tube 120 is retracted / extended.

[0065] Specifically, the drive motor that directly rotates the rotating lever is electrically driven and linked to the vehicle's forward collision signal, enabling automated retraction and extension. When operating in autonomous driving mode, the lever is retracted to maximize driver space. However, upon receiving a collision signal, the controller controlling the drive motor receives the signal and rapidly deploys the lever, ensuring the airbag deploys in the optimal position.

[0066] Meanwhile, although there is no view directly indicating the components by reference numerals, the main housing 130 may have a shock absorber.

[0067] The shock absorber absorbs the impact of the driver applied to the steering wheel to minimize the impact energy applied to the driver. It is composed of various components and can absorb the impact applied to the upper tube 120.

[0068] Figure 6 yes Figure 2 A cross-sectional view of the structure in which the guide component is passed through; Figure 7 yes Figure 3 A cross-sectional view of the structure in which the guide component is passed through; Figure 8 It shows Figure 3 and Figure 4 Stereoscopic views of the telescopic guide member in the guide component at various angles; Figure 9 It shows Figure 2 An exploded perspective view of the effect of the guide component on the upper tube in the structure.

[0069] like Figures 6 to 9 As shown, the steering column device 100 of an automobile according to one embodiment of the present invention is that, in order to set a guide component 160 for the main shell 130, a mounting hole 150 can be formed in the main shell 130 to pass through a portion, and is configured to expose the outer peripheral surface of the upper tube 120 that moves along the length direction (axial direction) at least internally.

[0070] Here, the guide component 160 may include: a telescopic guide 161, which has a lubricant groove space 162a for storing lubricant formed on the surface facing the outer peripheral surface of the upper tube 120; a fixing nut 167, which fixes the telescopic guide 161 to the mounting hole 150 formed in the main shell 130; and an elastic component 165, which is interposed between the fixing nut 167 and the telescopic guide 161, and keeps the telescopic guide 161 tightly against the guide surface 121 formed on the outer peripheral surface of the upper tube 120.

[0071] In particular, Figure 8As shown, the telescopic guide 161 is generally formed into a flat circular disc shape with the surface opposite the surface facing the upper tube 120. The surface facing the upper tube 120 accommodates a portion of the outer circumference of the upper tube 120 and is formed into a concave shape as a whole, allowing for close contact. The telescopic guide 161 can be made of plastic, a material that is easy to manufacture and lightweight.

[0072] like Figure 6 and Figure 7 As shown, the telescopic guide 161 is first inserted through the mounting hole 150 and can be positioned inside the upper tube 120. In particular, a pair of insertion guide grooves (not shown) are formed on the inner side surface of the mounting hole 150, which are cut out at approximately 180-degree intervals. A pair of insertion guide protrusions 163 are also formed on the outer circumference of the telescopic guide 161, corresponding to the pair of insertion guide grooves and protruding outward.

[0073] In particular, Figure 3 As shown in the partially enlarged view, an external thread 167S may be formed on the outer peripheral surface of the fixing nut 167 to be threadedly fastened to an internal thread 150S formed on the inner peripheral surface (inner side surface) of the mounting hole 150.

[0074] As described above, the fixing nut 167 is threadedly engaged with the mounting hole 150 formed in the main housing 130, so the greater the number of turns of the fixing nut 167 threadedly engaged with the mounting hole 150, the greater the adhesion force of the telescopic guide 161 against the outer peripheral surface of the upper tube 120 through the elastic component 165.

[0075] On the other hand, in order to threadably engage the fixing nut 167, the mounting hole 150 is formed to have a circular inner circumference; for the telescopic guide 161, the pair of insertion guide protrusions 163 stuck in the inner circumference of the mounting hole 150 are spaced apart from each other and formed as a whole with the end of the frame of the telescopic guide 161, so that regardless of whether there is a rotation action when the fixing nut 167 is threadedly engaged, the telescopic guide 161 will not rotate.

[0076] In particular, a pair of insertion guide grooves 153 are formed on the inner side surface (inner circumferential surface) of the mounting hole 150, and a pair of insertion guide protrusions 163 formed on the telescopic guide 161 are installed in the insertion direction; as described above, in the case where the inner side surface (inner circumferential surface) of the mounting hole 150 is formed to be threadedly engaged with the fixing nut 167, the pair of insertion guide grooves 153 can be formed by cutting a portion of the internal thread 150S of the mounting hole 150 in the circumferential direction.

[0077] Here, the telescopic guide 161 is accurately inserted into the pair of insertion guide grooves 153 when the pair of insertion guide protrusions 163 are inserted into the mounting hole 150 formed in the main shell 130, and can then match the surfaces of the two surfaces of the telescopic guide 161 that are recessed corresponding to the outer peripheral surface of the upper tube 120.

[0078] On the other hand, the lubricating portion 162 may be formed on the surface of the telescopic guide 161 that faces the outer peripheral surface of the upper tube 120. As described below, the lubricating portion 162 may include a lubricant groove space 162a and a lubricant distributing rib 162b.

[0079] More specifically, a lubricant groove space 162a for storing lubricant can be formed in the telescopic guide 161. The lubricant here is a kind of lubricating oil, which is constantly supplied to the contact surface between the telescopic guide 161 and the upper tube 120, thereby reducing friction between the two components and thereby minimizing wear.

[0080] In particular, when the telescopic guide 161 is continuously kept in close contact with the contact surface of the upper tube 120 with a predetermined close contact force through the elastic component 165, in order to minimize the amount of wear, the lubricant is stored in the lubricant groove space 162a and can then leak little by little between the frame end of the telescopic guide 161 and the contact surface of the upper tube 120 through the telescopic action.

[0081] The lubricant groove space 162a serves the following purpose: it temporarily stores lubricant (for example, grease) applied by the operator to areas where friction is expected, and then supplies or distributes the temporarily stored lubricant between the upper tube 120 and the upper tube 120 during the extension and contraction of the upper tube 120. Therefore, the operator does not need to constantly refill the lubricant. Instead, the lubricant is repeatedly stored in the lubricant groove space 162a and then supplied between the friction surfaces during the extension and contraction of the upper tube 120, as described above, before the injected lubricant completely evaporates or becomes ineffective.

[0082] On the other hand, Figure 8 As shown, the telescopic guide 161 may further include a plurality of lubricant distributing ribs 162b having a surface that is closely attached to the guide surface of the upper tube. The plurality of lubricant distributing ribs 162b may be formed in the lubricant groove space 162a.

[0083] If the lubricant groove space 162a is processed into an outward-facing recessed shape (i.e., an intaglio shape) formed from both sides of the telescopic guide 161 in order to fit tightly against the outer peripheral surface of the upper tube 120, the multiple lubricant dispersion ribs 162b may mean a portion that does not fall within the processing range of the intaglio shape.

[0084] Here, the lubricant distributing ribs 162 b are formed to extend along the lubrication direction of the upper tube 120 , and a plurality of lubricant distributing ribs 162 b are formed in a direction perpendicular to the lubrication direction. This is to ensure smooth lubrication movement through the telescopic guide 161 .

[0085] Therefore, if Figure 8As shown, the lubricant groove space 162a is formed in a concave shape in the remaining portion except for the plurality of lubricant dispersion ribs 162b, and is formed to be concave toward the side on which the elastic member 165 is disposed, and the depth faces are the same. Here, the depth faces being the same means that the thickness from the outer side surface of the extension guide 161 to the depth face is the same.

[0086] The lubricant groove space 162a as described above can be concave to divide the plurality of lubricant dispersion ribs 162b. If, as shown in FIG. 2, the lubricant groove space 162a is concave in a substantially circular shape to divide the inner side surface frame portion of the extension guide 161 and the plurality of lubricant dispersion ribs 162b, the plurality of dispersion ribs 162b can be arranged in parallel to each other in a substantially linear shape. Figure 8

[0087] Meanwhile, in the extension guide 161, an injection groove 164 can be formed concave at the frame outer side end portion for injecting lubricant between the outer circumferential surface of the upper pipe 120 and the concave surface of the extension guide 161.

[0088] The lubricant does not have to be injected directly into the inside of the lubricant groove space 162a, and thus the injection groove 164 can be formed at the frame outer side end portion forming the outer circumferential surface of the extension guide 161.

[0089] However, in the case where the upper pipe 120 is disposed to be inclined at a predetermined angle to the side on which the driver is seated, the injection groove 164 is preferably formed at the frame outer side end portion of the extension guide 161 to be opposite to the direction of gravity.

[0090] This is to allow the lubricant to flow naturally between the contact surface of the upper pipe 120 and the frame outer side end portion of the extension guide 161 if the lubricant groove space 162a is filled with lubricant, in the case where the user injects the lubricant through the injection groove 164 exposed to the outside after separating the fixing nut 167 and the elastic member 165 from the mounting hole 150.

[0091] As shown in FIG. 1, the extension guide 161 can be inserted into the elastic member 165 after being coupled to the mounting hole 150 of the main housing 130. Figure 6 Figure 7 As shown in FIG. 1, the extension guide 161 can be inserted into the elastic member 165 after being coupled to the mounting hole 150 of the main housing 130.

[0092] ​​At the same time, the elastic member 165 inserted into the mounting hole 150 of the main housing 130 can continuously transmit the elastic force to the telescopic guide 161 by the tightening force of the fixing nut 167 that is tightened to the mounting hole 150 through the nut.

[0093] A tool groove 168 may be formed on the outer side of the fixing nut 167 to perform rotational tightening using a predetermined fixing tool. The elastic force of the elastic member 165 can of course be adjusted at any time by the staff who tightens the tool groove 168 of the fixing nut 167.

[0094] With reference to the accompanying drawings (particularly, Figure 9 ) The following briefly describes the effects of the steering column device 100 for an automobile according to an embodiment of the present invention, which is constructed with the structure described above.

[0095] First, the guide member 160 always keeps the inner surface of the telescopic guide 161 in close contact with the guide surface 121 of the outer peripheral surface of the upper tube 120 due to the elastic force of the elastic member 165 acting in proportion to the tightening force of the fixing nut 167 .

[0096] In the state described above, if the user performs the telescopic movement of the steering column 110, the upper tube 120 also moves in conjunction with this to extend or contract in the length direction (axial direction). At this time, the lubricant stored in the lubricant groove space 162a formed on the inner surface of the telescopic guide 161 is distributed and supplied through the lubricant dispersion ribs 162b, thereby minimizing the friction between the upper tube 120 and the outer peripheral surface.

[0097] If the friction with the upper tube 120 is minimized, the knocking sound (abnormal noise) generated during the reversal of the conventional telescopic action can be fundamentally eliminated, thereby providing the advantage of preventing the user's experience quality of the product from being degraded.

[0098] A steering column device for an automobile according to one embodiment of the present invention has been described above in detail with reference to the accompanying drawings. However, the present invention is not necessarily limited to the embodiment described above. Persons skilled in the art will readily appreciate that various modifications and equivalent implementations are possible. Therefore, the true scope of the present invention should be defined by the following claims.

[0099] Industrial Applicability

[0100] The utility model provides a steering column device for an automobile, which continuously supplies lubricant through a telescopic guide configured to guide the movement in the length direction during the telescopic action of an upper tube, and facilitates the injection of lubricant into a lubricant groove space formed inside the telescopic guide.

Claims

1. A steering column device for an automobile, comprising: a main housing accommodating a steering column so as to pass therethrough and supporting the steering column at a predetermined portion of the vehicle body; an upper tube interposed between the inner peripheral surface of the main housing and the outer peripheral surface of the steering column, and moving in conjunction with the steering column when the steering column is extended or retracted; and a guide member provided on the main housing and configured to guide axial movement of the upper tube that moves in conjunction with the steering column; The guide component includes a telescopic guide, and a lubricant groove space for storing lubricant is formed on a surface of the telescopic guide facing the outer peripheral surface of the upper tube.

2. The steering column device for an automobile according to claim 1, characterized in that: The guide component further includes a fixing nut, The fixing nut fixes the telescopic guide to a mounting hole formed in the main housing.

3. The steering column device for an automobile according to claim 2, characterized in that: The guide component further includes an elastic component, The elastic member is interposed between the fixing nut and the telescopic guide, and brings the telescopic guide into close contact with a guide surface formed on the outer peripheral surface of the upper tube.

4. The steering column device for an automobile according to claim 3, characterized in that: The fixing nut is formed with an external thread on the outer peripheral surface so as to be threadedly fastened to the internal thread formed on the inner peripheral surface of the mounting hole; The fixing nut is configured such that, as the number of turns of the threaded engagement with the mounting hole increases, the elastic component causes the telescopic guide to adhere to the outer peripheral surface of the upper tube more strongly.

5. The steering column device for an automobile according to claim 3, characterized in that: In order to threadably engage the fixing nut, the mounting hole is formed to have a circular inner circumferential surface; The telescopic guide is a pair of insertion guide protrusions clamped on the inner circumference of the mounting hole and spaced apart from each other to form an integral body with the frame end of the telescopic guide, so that the fixing nut will not rotate regardless of whether it is threadedly engaged.

6. The steering column device for an automobile according to claim 5, characterized in that: A pair of insertion guide grooves are formed on the inner circumferential surface of the mounting hole, and the pair of insertion guide grooves are arranged in an insertion direction to receive the pair of insertion guide protrusions formed on the telescopic guide; The pair of insertion guide grooves are formed by cutting internal threads on the inner circumferential surface of the mounting hole, and the internal threads are formed to be threadedly coupled with the fixing nut.

7. The automotive steering column device according to any one of claims 3 to 6, characterized in that: The telescopic guide comprises: lubricant dispersing ribs, closely attached to the guide surface of the upper tube; and The lubricant groove space is recessed further toward the side where the elastic component is located than the lubricant dispersing rib.

8. The steering column device for an automobile according to claim 7, characterized in that: The lubricant groove space is formed in a concave shape so as to divide the lubricant dispersing rib into a frame portion of the telescopic guide.

9. The steering column device for an automobile according to claim 7, characterized in that: The lubricant groove space is recessed into a straight line to divide the lubricant dispersing rib.

10. The steering column device for an automobile according to claim 7, characterized in that: The lubricant groove space is recessed to have the same depth as the side where the elastic component is located.

11. The steering column device for an automobile according to claim 7, characterized in that: The telescopic guide is a concave injection groove formed at the outer end of the frame, which is used to inject the lubricant into the inner side of the lubricant groove space.

12. The automotive steering column device according to claim 11, characterized in that: The injection groove is formed relatively upward in the direction of gravity at the outer end portion of the frame of the telescopic guide when the upper tube is arranged obliquely.

13. The steering column device for an automobile according to claim 7, characterized in that: The lubricant distributing ribs are formed to extend along the lubrication direction of the upper tube, and a plurality of ribs are formed in a direction perpendicular to the lubrication direction.

14. The steering column device for an automobile according to claim 7, characterized in that: The telescopic guide is made of plastic.

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