JP5509721B2 - Vehicle steering device - Google Patents

Description

  The present invention relates to a vehicle steering apparatus that enables tilt adjustment and telescopic adjustment to adjust the position of a steering wheel.

  The vehicle steering apparatus is configured such that the steering force of the steering wheel is transmitted to the left and right steering wheels via a steering shaft, a steering gear unit, a tie rod, and the like. Further, the vehicle steering apparatus is provided with a tilt adjustment mechanism and a telescopic adjustment mechanism in order to adjust the position of the steering wheel in accordance with the body shape of the driver. The tilt adjustment is to adjust the height mainly by tilting the steering wheel, and the telescopic adjustment is mainly to adjust the distance by moving the steering wheel in the axial direction of the steering shaft.

  In general, tilt adjustment and telescopic adjustment are performed by releasing the restraint of the steering column holding the steering shaft and so-called unclamping. When tilt adjustment and telescopic adjustment are finished, the steering column is restrained and so-called clamping is performed. In a vehicle steering apparatus with a position adjusting function, the steering wheel holding force at the time of clamping is emphasized. That is, if the position of the steering wheel moves in the collision direction in a secondary collision in which the driver collides with the steering wheel at the time of the collision, there arises a problem that the position of the deployed airbag cannot be determined.

  For increasing the steering wheel holding force at the time of clamping, for example, various companies provide vehicle steering devices including a steering column fastening structure including a mechanism such as a gear. However, in a steering column fastening structure using a gear, there is a possibility that the crest of the gear overlaps and the fastening is incomplete. Further, in order to avoid the incomplete fastening, the cost increases when one of the gear ridges or both gear ridges are provided with a mechanism that moves in a direction to avoid overlapping at the time of fastening.

  Therefore, for example, a vehicle steering device described in Patent Document 1 below and a vehicle steering device described in Patent Document 2 below have been proposed. Among these, in the vehicle steering device described in Patent Document 1 below, when the column side member is disposed inside the vehicle body side holding member and the column side member is pressed and held on the vehicle body side holding member by the clamp mechanism, Two high friction materials on one side are interposed between the clamp mechanism and the vehicle body side holding member and between the vehicle body side holding member and the column side member so as to increase the holding force of the column side member, that is, the steering wheel. ing. Further, in Patent Document 2 below, a friction plate is attached to the inside of the vehicle body side bracket, a sliding contact piece of a flexible member is interposed between the steering column and the friction material, and the steering column is pushed downward by a lock mechanism. However, the flexible member is pushed upward and the sliding contact piece of the flexible member is forcibly pushed between the steering column and the friction material to increase the holding force of the steering column, that is, the steering wheel.

JP 2002-362377 A JP 2001-213331 A

However, in the vehicle steering device described in each of the above patent documents, the friction plate and the high friction material are separate members, and the assembly is troublesome, and the cost increases accordingly.
The present invention has been made by paying attention to the above-described problems, and it is easy to assemble while securing the holding force of the steering wheel at the time of clamping, and the vehicle steering that can reduce the cost accordingly. The object is to provide an apparatus.

In order to solve the above problem, the vehicular steering apparatus of the present invention, the position of the steering wheel the steering wheel and retainer-less Copic adjusted by the moving axially with tilt adjustment by tilting the steering wheel In the vehicle steering apparatus capable of adjusting the high friction coefficient material, one or both of the contact surfaces at the time of clamping of the member that relatively moves when adjusting the position of the steering wheel by both the tilt adjustment and the telescopic adjustment are integrated. It is characterized by the fact that it has been applied.

Further, the friction coefficient of the contact surface during clamping is set to 1 or more.
The high friction coefficient material is a rubber material having a thickness of 500 μm or less.
Further, the high friction coefficient material is imparted with conductivity.
The high friction coefficient material is formed by coating.

Further, at the time of unclamping, a predetermined interval is provided between the contact surfaces of the members.
Further, at the time of the tilt adjustment or the telescopic adjustment, a portion other than the high friction coefficient material slides.
In addition, the contact surface of the members that move relative to each other during the tilt adjustment or telescopic adjustment is provided with a surface that is not provided with a high friction coefficient material.

Thus, according to the vehicle steering apparatus of the present invention, the high friction coefficient material is integrally applied to either one or both of the contact surfaces at the time of clamping of the member that relatively moves when adjusting the position of the steering wheel at the time of clamping. This facilitates assembly while ensuring the holding force of the steering wheel at the time of clamping, and the cost can be reduced accordingly.
Moreover, the steering wheel holding force at the time of clamping can be ensured by setting the friction coefficient of the contact surface to 1 or more.

In addition, since the high friction coefficient material is a rubber material having a thickness of 500 μm or less, it is possible to prevent a decrease in rigidity during clamping and to prevent creep deformation.
Moreover, the use of the high friction coefficient material expands its application such as horn.
In addition, since the high coefficient of friction material is formed by coating, the cost can be further reduced and the assembly is facilitated.
Further, at the time of unclamping, the members can be prevented from sticking by providing a predetermined interval between the contact surfaces of the members.

In addition, since the part other than the high friction coefficient material slides at the time of tilt adjustment or telescopic adjustment, the wear of the high friction coefficient material can be prevented, the operation force during adjustment is not increased, and the conductive When the property is imparted, conductivity can be ensured.
In addition, by providing a contact surface between members that move relative to each other during tilt adjustment or telescopic adjustment, a surface not provided with a high coefficient of friction material is also provided. Horn etc.) can be operated normally.

1 is an overall view of a steering shaft portion showing a first embodiment of a vehicle steering device of the present invention. It is a longitudinal cross-sectional view which shows an example of a steering shaft and an inner column. FIG. 2 is a cross-sectional view perpendicular to the axis of the steering shaft upper body connecting structure portion of FIG. 1. FIG. 4 is a detailed view of the upper vehicle body connection structure portion of FIG. 3 when unclamping. FIG. 6 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing a second embodiment of the vehicle steering device of the present invention. FIG. 7 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing a third embodiment of the vehicle steering device of the present invention. FIG. 10 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing a fourth embodiment of the vehicle steering device of the present invention. FIG. 10 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing a fifth embodiment of the vehicle steering device of the present invention. FIG. 10 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing a sixth embodiment of the vehicle steering device of the present invention. FIG. 10 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing a seventh embodiment of the steering apparatus for a vehicle of the present invention. FIG. 10 is a cross-sectional view perpendicular to the axis of a steering shaft upper body connecting structure portion showing an eighth embodiment of a vehicle steering device of the present invention.

Next, a vehicle steering apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view of a steering shaft portion of a vehicle steering apparatus according to the present embodiment. In this vehicle steering device, the upper end portion of the steering shaft 2 is connected to the central portion (hub portion) of the steering wheel 1, and the steering shaft 2 is disposed obliquely downward toward the front of the vehicle body. A lower end portion of the steering shaft 2 is connected to the intermediate shaft 4 through a universal joint 3. The intermediate shaft 4 is connected to the left and right steering wheels via a steering gear unit, tie rods and the like (not shown). With this configuration, the steering force of the steering wheel 1 is transmitted to the left and right steering wheels via the steering shaft 2, the intermediate shaft 4, the steering gear unit, etc., and the left and right steering wheels are steered. .

  As shown in FIG. 2, an inner column 5 is disposed on the outer periphery of the steering shaft 2, and a column housing 8 is disposed on the upper outer periphery thereof. The column housing 8 includes the upper vehicle body connection structure 7. The inner column 5 is connected to the vehicle body via the lower vehicle body connection structure 6. As will be described later, the column housing 8 is supported by the tilt bracket 13, and the inner column 5 is supported by the pivot bracket 12. In this embodiment, the inner column 5 and the column housing 8 constitute a general steering column.

  The upper vehicle body connection structure 7 includes an upper pivot bracket 12, a lower tilt bracket 13, a clamp bolt 16, a nut 15, and a handle lever 17, for adjusting the position of the steering wheel 1. Tilt adjustment and telescopic adjustment are possible. In the tilt adjustment, the steering wheel 1 is tilted to mainly adjust the height. In the telescopic adjustment, the steering wheel 1 is moved in the axial direction of the steering shaft 2 to mainly adjust the distance.

  In order to enable telescopic adjustment, the steering shaft 2 is formed by spline (or serration) fitting of two shaft members 2a and 2b, for example, as shown in FIG. Further, the steering shaft 2 including the shaft members 2 a and 2 b is rotatably supported in the column housing 8 and the inner column 5 by a plurality of bearings 21.

  FIG. 3 shows a cross section perpendicular to the axis in the upper vehicle body connection structure 7. The inner column 5 is almost fitted by a nonferrous metal column housing 8. A slit is formed in the lower end portion of the column housing 8 along the axial direction, and a tightening portion 9 is extended below both sides of the slit. The tilt bracket 13 is attached to an upper vehicle body attachment portion (not shown), and has two side wall portions extending downward so as to sandwich the column housing 8 from both sides in the vehicle width direction. A clamp bolt 16 is inserted into one tilt bracket side wall 13, and its shaft portion penetrates the two tightening portions 9 of the column housing 8, and the clamp bolt 16 protruding from the tightening portion 9 is used as the other tilt bracket. The nut 15 protrudes from the side wall 13, and the nut 15 is screwed to the tip screw portion with the two cam plates 11 and the thrust bearing 18 interposed therebetween. Among these, one cam plate 11 rotates together with the handle lever 17. When the handle lever 17 is rotated downward, for example, the thrust force generated by the rotation of the cam plate 11 causes the cam plate 11 and the clamp bolt 16 to move. The two tightening portions 9 are pressed together with the tilt bracket side wall portion 13 with the head, and the inner column 5 is clamped by the tightening force generated at the inner column fitting portion of the column housing 8 at that time, so-called clamped. . On the other hand, when the handle lever 17 is rotated upward, for example, the thrust force due to the rotation of the cam plate 11 is released, the pressing of the tightening portion 9 by the cam plate 11 and the head of the clamp bolt 16 is released, and the inner column cover of the column housing 8 is released. The tightening force of the inner column 5 by the fitting portion is weakened and unclamped.

  The pivot bracket 12 is provided with a pin 10 having an axis in the vehicle width direction. The pivot bracket 12, that is, the column housing 8, the inner column 5, and the steering shaft 2 can be rotated around the axis of the pin 10 together. There is a tilt adjustment at the time of unclamping, that is, the steering wheel 1 can be tilted. In addition, slide guides 19 that are long in the axial direction protrude from both ends of the column housing 8 in the vehicle width direction. When the unclamp is telescopic adjustment, that is, when the steering wheel 1 moves in the axial direction, The slide guide 19 slides inside the two tilt brackets 13 and guides.

  In the present embodiment, the high friction coefficient material coating layer 20 is provided on both outer sides in the vehicle width direction of the tightening portion 9 of the column housing 8 with which the inner side surface in the vehicle width direction of each tilt bracket 13 abuts. The high friction coefficient material coating layer 20 is formed by dipping or applying a rubber material having a friction coefficient of 1 or more to a thickness of 500 μm or less. Thereby, when the inner column 5 is clamped, a large frictional force, that is, a large clamping force is generated between the inner surface of the tilt bracket 13 and the tightening portion 9 of the column housing 8, and the steering wheel 1 is firmly held. Further, since the high friction coefficient material coating layer 20 is integrally provided by coating on both outer sides in the vehicle width direction of the tightening portion 9 of the column housing 8, it is not necessary to use a separate high friction coefficient member. As a result, the assembly becomes easier, and the cost can be reduced accordingly. As is well known, the rubber material itself is not a very strong member, but by setting the thickness of the coating layer to 500 μm or less, even when tightening with the head of the clamp bolt 16 and the inner surface of the cam plate 11, Sufficient rigidity can be obtained without causing so-called bending due to buckling or the like.

Furthermore, the high friction coefficient material coating layer 20 of the present embodiment is imparted with conductivity by, for example, mixing carbon black. By imparting conductivity to the high-friction coefficient material coating layer 20 in this way, for example, an electrical component such as a horn equipped in the steering wheel 1 can be operated normally, and the application is expanded.
Further, at the time of unclamping, as shown in FIG. 4, for example, the tightening portion 9 of the column housing 8 and the inner side surface of the tilt bracket 13 (substantially, due to the displacement accompanying the thrust force of the cam plate 11 opposite to the clamping time). Is formed between the high friction coefficient material coating layer 20 and the inner side surface of the tilt bracket 13 (the same is true between the tightening portion 9 on the opposite side and the inner side surface of the tilt bracket 13). The high frictional force due to the material coating layer 20 is not generated between the tilt bracket 13 and the inner surface of the tilt bracket 13, and only the slide guide 19 of the column housing 8 is slidably guided inside the two tilt brackets 13. Thereby, for example, it is possible to prevent an adjustment force during telescopic adjustment from becoming unnecessarily large. Further, with this configuration, when the high friction coefficient coating layer 20 made of a rubber member is fixed to the inner surface of the tilt bracket 13 in a clamped state for a long time, it can be forcibly separated. It becomes possible.

  FIG. 5 is a cross-sectional view perpendicular to the axis showing a second embodiment of the vehicle steering apparatus of the present invention. The vehicle steering device of the present embodiment is substantially the same as the vehicle steering device of the first embodiment, and the cross section perpendicular to the axis of the upper vehicle body connection structure 7 shown in FIG. 5 is the same as that of FIG. 3 of the first embodiment. This is substantially the same as the upper vehicle body connection structure 7. Accordingly, equivalent constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the formation position of the high-friction coefficient material coating layer 20 made of the rubber member described above is different from that in FIG. 3 of the first embodiment. In this embodiment, in addition to both outer sides in the vehicle width direction of the tightening portion 9 of the column housing 8, high friction is also applied to both ends in the vehicle width direction of the slide guides 19 that protrude from both ends in the vehicle width direction of the column housing 8. The coefficient material coating layer 20 is integrally formed by coating.

  FIG. 6 is a cross-sectional view perpendicular to the axis showing a third embodiment of the vehicle steering device of the present invention. The vehicle steering device of the present embodiment is substantially the same as the vehicle steering device of the first embodiment, and the cross section perpendicular to the axis of the upper vehicle body connection structure 7 shown in FIG. 6 is also the same as that of FIG. 3 of the first embodiment. This is substantially the same as the upper vehicle body connection structure 7. Accordingly, equivalent constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the formation position of the high-friction coefficient material coating layer 20 made of the rubber member described above is different from that in FIG. 3 of the first embodiment. In the present embodiment, the high friction coefficient material coating layer 20 is integrally formed by coating on the inner surfaces of the two tilt brackets 13 in the vehicle width direction, that is, the side surfaces of the column housing 8.

  FIG. 7 is a cross-sectional view perpendicular to the axis showing a fourth embodiment of the vehicle steering apparatus of the present invention. The vehicle steering device of the present embodiment is substantially the same as the vehicle steering device of the first embodiment, and the cross section perpendicular to the axis of the upper vehicle body connection structure 7 shown in FIG. 7 is also the same as that of FIG. 3 of the first embodiment. This is substantially the same as the upper vehicle body connection structure 7. Accordingly, equivalent constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the formation position of the high-friction coefficient material coating layer 20 made of the rubber member described above is different from that in FIG. 3 of the first embodiment. In the present embodiment, in addition to both outer sides in the vehicle width direction of the tightening portion 9 of the column housing 8, two end portions in the vehicle width direction of the slide guides 19 projecting from both ends in the vehicle width direction of the column housing 8 are also provided. A high friction coefficient material coating layer 20 is also integrally formed on the inner surface of each tilt bracket 13 in the vehicle width direction, that is, the side surface of the column housing 8 by coating.

  FIG. 8 is a cross-sectional view perpendicular to the axis showing a fifth embodiment of the vehicle steering device of the present invention. The vehicle steering device of the present embodiment is substantially the same as the vehicle steering device of the first embodiment, and the cross section perpendicular to the axis of the upper vehicle body connection structure 7 shown in FIG. 8 is the same as that of FIG. 3 of the first embodiment. This is substantially the same as the upper vehicle body connection structure 7. Accordingly, equivalent constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the formation position of the high-friction coefficient material coating layer 20 made of the rubber member described above is different from that in FIG. 3 of the first embodiment. In the present embodiment, the high friction coefficient material coating layer 20 is coated on the inner surface of the clamp bolt 16 in the vehicle width direction, that is, the side surface of the tilt bracket 13 and the inner surface of the cam plate 11 in the vehicle width direction, that is, the side surface of the tilt bracket 13. It is integrally formed.

  FIG. 9 is a cross-sectional view perpendicular to the axis showing a sixth embodiment of the vehicle steering device of the present invention. The vehicle steering device of the present embodiment is substantially the same as the vehicle steering device of the first embodiment, and the cross section perpendicular to the axis of the upper vehicle body connection structure 7 shown in FIG. 9 is the same as that of FIG. 3 of the first embodiment. This is substantially the same as the upper vehicle body connection structure 7. Accordingly, equivalent constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the formation position of the high-friction coefficient material coating layer 20 made of the rubber member described above is different from that in FIG. 3 of the first embodiment. In the present embodiment, the high friction coefficient material coating layer 20 is integrally formed by coating on the outer surface in the vehicle width direction of each tilt bracket 13, that is, on the side surface of the head of the clamp bolt 16 and the inner surface side of the cam plate 11. .

  FIG. 10 is a cross-sectional view perpendicular to the axis showing a seventh embodiment of the vehicle steering apparatus of the present invention. The vehicle steering device of the present embodiment is substantially the same as the vehicle steering device of the first embodiment, and the cross section perpendicular to the axis of the upper vehicle body connection structure 7 shown in FIG. 10 is the same as that of FIG. 3 of the first embodiment. This is substantially the same as the upper vehicle body connection structure 7. Accordingly, equivalent constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the formation position of the high-friction coefficient material coating layer 20 made of the rubber member described above is different from that in FIG. 3 of the first embodiment. In the present embodiment, the inner surface of the head of the clamp bolt 16, that is, the side surface of the tilt bracket 13 and the inner surface of the cam plate 11, that is, the side surface of the tilt bracket 13, and the outer surface in the vehicle width direction of the tilt bracket 13, that is, the clamp bolt 16. The high friction coefficient material coating layer 20 is integrally formed on the side surface of the head and the inner side surface of the cam plate 11 by coating.

  FIG. 11 is a cross-sectional view perpendicular to the axis showing the eighth embodiment of the vehicle steering apparatus of the present invention. The schematic configuration of the vehicle steering device of the present embodiment is the same as that shown in FIG. 1 of the first embodiment, and the schematic configuration of the steering shaft is the same as that shown in FIG. 2 of the first embodiment. is there. In the vehicle steering device of the present embodiment, the configuration of the upper vehicle body connection structure that supports the inner column is slightly different from the configuration of the upper vehicle body connection structure 7 of FIG. 3 of the first embodiment. However, since there are many equivalent configurations, the same components are denoted by the same reference numerals, and detailed description thereof is omitted. Specifically, the nonferrous metal column housing of the first embodiment is changed to an iron outer column 22 to form an iron steering column structure as a whole.

  The inner column 5 is fitted with another cylindrical outer column 22 which is also covered with an arc portion of an inverted U-shaped metal U-shaped bracket 23. On each inner side of the two hanging parts 25 of the U-shaped bracket 23, clamp brackets 24 that come into contact with the outer column 22 from both lower sides in the vehicle width direction of the outer column 22 are provided. The clamp bolt 16 is inserted through the two hanging portions 25 of the U-shaped bracket 23 and the two tilt brackets 13 so as to pass through the two clamp brackets 24.

  Therefore, in this embodiment, when the handle lever 17 is rotated downward, for example, the two hanging portions 25 of the U-shaped bracket 23 are tilted between the cam plate 11 and the head of the clamp bolt 16 by the thrust force generated by the rotation of the cam plate 11. The inner column 5 is clamped together with the outer column 22 by the tightening force generated between the arcuate portion of the U-shaped bracket 23 and the clamp bracket 24 at that time, and is so-called clamped. On the other hand, when the handle lever 17 is rotated upward, for example, the thrust force due to the rotation of the cam plate 11 is released, the pressing of the hanging portion 25 by the head of the cam plate 11 and the clamp bolt 16 is released, and the U-shaped bracket 23 and the clamp bracket 24, the tightening force is weakened and unclamped. During telescopic adjustment during unclamping, the outer column 22 is slide-guided by the clamp bracket 24.

  In the present embodiment, the high friction coefficient material coating layer 20 made of a rubber member or the like is coated on the outer surface in the vehicle width direction of the two hanging parts 25 of the U-shaped bracket 23 by the coating, as in the first embodiment. It is provided integrally with the character bracket 23. The characteristics of the high coefficient of friction material coating layer 20 are the same as in the first embodiment. Thereby, at the time of clamping, a large frictional force, that is, a large clamping force is generated between the inner side surface in the vehicle width direction of the tilt bracket 13 and the hanging portion 25 of the U-shaped bracket 23, and the steering wheel 1 is firmly held.

  Further, at the time of unclamping, due to the displacement accompanying the thrust force of the cam plate 11 in the direction opposite to that at the time of clamping, the space between each hanging portion 25 of the U-shaped bracket 23 and the inner surface in the vehicle width direction of the tilt bracket 13 (substantially Is formed between the high friction coefficient material coating layer 20 and the inner surface of the tilt bracket 13 so that a high frictional force by the high friction coefficient material coating layer 20 is not generated between the tilt bracket 13 and the high friction coefficient material coating layer 20. Only the clamp bracket 24 of the U-shaped bracket 23 is slidably in contact with the outer periphery of the outer column 22 and guided. Thereby, for example, it is possible to prevent an adjustment force during telescopic adjustment from becoming unnecessarily large.

In the eighth embodiment, the high-friction coefficient material coating layer 20 is provided on both outer sides in the vehicle width direction of the two hanging parts 25 of the U-shaped bracket 23. For example, it is provided on the inner side surface in the vehicle width direction of the tilt bracket 13, or both the outer side in the vehicle width direction of the two hanging portions 25 of the U-shaped bracket 23 and the inner side surface in the vehicle width direction of the tilt bracket 13. It may be provided on both sides. That is, in the present invention, the high friction coefficient material may be integrally applied to either one or both of the clamping contact surfaces of the member that relatively moves when adjusting the position of the steering wheel.
Further, the configuration itself of the steering device to which the vehicle steering device of the present invention is applied is not limited to the above, and can be widely applied to all vehicle steering devices.

1 is a steering wheel 2 is a steering shaft 3 is a universal joint 4 is an intermediate shaft 5 is an inner column 6 is a lower vehicle body connection structure 7 is an upper vehicle body connection structure 8 is a column housing 9 is a tightening portion 10 is a pin 11 is a cam plate 12 is Pivot bracket 13 Tilt bracket 14 Inner tube 15 Nut 16 Clamp bolt 17 Handle lever 18 Thrust bearing 19 Slide guide 20 High friction coefficient material coating layer 21 Bearing 22 Outer column 23 U-shaped bracket 24 Is the clamp bracket 25

Claims (6)

In the vehicle steering apparatus capable of adjusting the tilt by tilting the steering wheel and adjusting the position of the steering wheel by moving the steering wheel in the axial direction to adjust the position of the steering wheel, both the tilt adjustment and the telescopic adjustment are performed. A high friction coefficient material is integrally applied to one or both of the contact surfaces during clamping of a member that moves relative to the position of the steering wheel by means of coating , and a predetermined interval is provided between the contact surfaces of the members during unclamping. A steering apparatus for a vehicle characterized by being provided .   The vehicle steering apparatus according to claim 1, wherein a friction coefficient of the contact surface during clamping is set to 1 or more.   3. The vehicle steering apparatus according to claim 1, wherein the high friction coefficient material is a rubber material having a thickness of 500 [mu] m or less.   The vehicle steering apparatus according to any one of claims 1 to 3, wherein the high friction coefficient material is provided with conductivity. The vehicle steering apparatus according to claim 1 , wherein a portion other than the high friction coefficient material slides during the tilt adjustment or telescopic adjustment.   The vehicle steering apparatus according to any one of claims 1 to 3, wherein a surface not provided with a high-friction coefficient material is provided on a contact surface between members that move relatively during the tilt adjustment or telescopic adjustment. .

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