JP2010105521A - Vehicular steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular steering device including a lock mechanism, a rattling preventing mechanism, and also an energy absorption mechanism executed by contraction of a column and a shaft. <P>SOLUTION: The vehicular steering device 1 in which a movable jacket 2 is supported to a column bracket 4 fixed to a vehicle body side in a vertical direction or an axial direction through the lock mechanism provided with a tilt bolt 5 to make adjustment possible, and a stationary jacket 3 is inserted in the inside of the movable jacket 2 to separate the column bracket 4 from a vehicle body when load at least the predetermined value is applied to the steering shaft includes the rattling preventing mechanism pressing the stationary jacket 3 to the movable jacket 2 side by rotation operation of the tilt bolt 5 between an inner face of the movable jacket 2 and an outer face of the stationary jacket 3 that face each other, and a pressing release means releasing pressing of the stationary jacket 3 by the tilt bolt 5 simultaneously when the column bracket 4 is separated from the vehicle body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle steering apparatus that can significantly increase the rigidity of a steering column having at least a tilt mechanism or a telescopic function and can absorb impact energy applied to a driver at the time of a vehicle collision.

  As this type of conventional steering column device, there is one provided with a mechanism for significantly increasing the rigidity of the steering column for tilt adjustment or telescopic adjustment, and there is one disclosed in Patent Document 1 as a conventional example.

In this structure, a pair of clamp members 12 and 12 are provided inside the lower outer column 4 so as to hold the inner column 3 on the upper side. The members 12 and 12 are moved so as to be close to each other, and the inner column 3 on the upper side is held and clamped by the pair of clamp members 12 and 12. Since the upper inner column 3 is directly clamped by the lower outer column 4 in this manner, the backlash between the columns 3 and 4 is prevented and the rigidity of the steering column is increased. can do.
JP 2001-347953 A

  However, in the conventional steering column device, since the pair of clamp members 12 and 12 are provided so as to hold the inner column 3 on the upper side, a high load that resists the clamping force of the pair of clamp members 12 and 12 is provided. This is a structure in which the inner column 3 cannot be shrunk unless the is added. Even if it can be shrunk, since it is shrunk by a high load from beginning to end, the setting cannot be freely changed so that, for example, the first half shrinks with a high load and the second half with a low load. Therefore, there is a problem that it is difficult to provide an energy absorption structure in which the column and the shaft are contracted and the column bracket is detached from the vehicle body so as to correspond to various vehicles.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a vehicle steering apparatus that includes a lock mechanism and a backlash pressing mechanism, and also includes an energy absorbing structure that is contracted by a column and a shaft. For the purpose.

  In order to achieve the above object, the invention according to claim 1 is directed to the vertical direction or the shaft through a lock mechanism having a bolt on a column bracket fixed to the vehicle body with a movable jacket that rotatably supports the steering shaft. In a vehicle steering device configured to support the vehicle so as to be adjustable in a direction, and to insert a fixed jacket into the movable jacket so that the column bracket is detached from the vehicle body when a load of a predetermined value or more is applied to the steering shaft. A backlash mechanism for pressing the fixed jacket toward the movable jacket by rotating the bolt between the inner surface of the movable jacket and the outer surface of the fixed jacket facing each other, and the column bracket from the vehicle body At the same time as it is detached, the fixing jacket by the bolt Characterized in that a press releasing means for releasing the pressure of the bets.

  According to a second aspect of the present invention, in the first aspect of the present invention, the pressing release means includes a convex portion partially formed on a side portion of the fixed jacket, and a notch formed in the convex portion in the axial direction. It is characterized by comprising a groove and a pressing member that is lightly press-fitted into the notch groove and is movable in the axial direction together with the bolt.

  According to the first aspect of the present invention, when a load acts on the steering wheel from the driver at the time of a vehicle collision, the load is transmitted to the movable jacket via the steering shaft. As a result, it moves to the front of the vehicle together with the movable jacket and leaves the vehicle body, and the energy consumed by the separation of the column bracket is absorbed to protect the driver from the impact.

  Therefore, in a structure equipped with a lock mechanism and a rattle presser mechanism, the column bracket is detached from the vehicle body and the pressing force of the fixed jacket by the bolt is released, so there is no influence between the two jackets without being affected by the pressing force of the rattle presser mechanism. The above-described energy absorbing structure can be provided, and the safety of the driver is improved.

  According to the invention of claim 2, when the vehicle collides and the column bracket moves forward, the bolt inserted through the column bracket moves in the same direction, and the pressing member also moves together with the bolt. At the same time that the column bracket is detached from the vehicle body, the pressing member is released from the notch groove formed in the convex portion of the fixed jacket, so that the axial force of the bolt is released and the pressing of the fixed jacket by the bolt is released. The shaft and steering wheel can move freely together with the fixed jacket and column bracket to the front of the vehicle body, and by adjusting the pressing force of the pressing member, the timing when the pressing member leaves the fixed jacket and when the fixed jacket contracts The load can be adjusted, and it is compatible with various vehicles as an energy absorption structure. Theft is possible.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<Embodiment 1>
1 is a cutaway side view of a main part of a vehicle steering apparatus according to Embodiment 1 of the present invention, FIG. 2 is a side view of the main part of the vehicle steering apparatus, and FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a perspective view showing a shape of a fixed cam and a rotating cam constituting the center lock mechanism, and FIG. 5 is a partial perspective view showing a press-fitting structure of the fixed cam to the fixed jacket.

  In the vehicle steering apparatus 1 shown in FIGS. 1 and 2, reference numeral 2 denotes a cylindrical movable jacket having a non-circular cross section as shown in FIG. 3, and a cylindrical fixed jacket 3 is disposed inside the movable jacket 2. The vehicle steering apparatus 1 is attached to the vehicle body in a state inclined at a predetermined angle with the left side (front of the vehicle) in FIGS. 1 and 2 facing down.

  The movable jacket 2 is movable in the axial direction with respect to the fixed jacket 3, and a lower part thereof is attached to a column bracket 4 fixed on the vehicle body side so as to be movable in the axial direction by a tilt bolt 5. Further, although not shown, the fixed jacket 3 whose upper part is fitted inside the movable jacket 2 is pivotally attached to the vehicle body side so that the lower end of the fixed jacket 3 can be turned up and down. A steering shaft 6 is rotatably inserted into the interior.

  Accordingly, the movable jacket 2 and the fixed jacket 3 and the steering shaft 6 inserted through these are supported so as to be pivotable up and down around the pivotally attached portion of the lower end of the fixed jacket 3 to the vehicle body. Here, the upper portion of the steering shaft 6 is rotatably supported by the movable jacket 2 by a bearing 7 as shown in FIG. 1, and the lower portion of the steering shaft 6 is rotatably supported by the fixed jacket 3 by a bearing (not shown). A steering wheel (not shown) is bound to the upper end of the steering wheel. Although not shown, the steering shaft 6 is divided into an upper shaft and a lower shaft in the axial direction, and the upper shaft and the lower shaft are spline-fitted so as to be slidable in the axial direction. The shaft 6 can expand and contract in the axial direction. The lower end portion of the steering shaft 6 is connected to a steering device (not shown) such as a power steering device.

  Thus, when the driver rotates the steering wheel (not shown) left and right, the rotation is transmitted to the steering device (not shown) via the steering shaft 6, and the front wheels (not shown) are steered left and right to Steering in that direction is performed.

  By the way, the vehicle steering apparatus 1 according to the present embodiment is provided with a tilt function and a telescopic function, and the movable jacket 2, the fixed jacket 3, and the steering shaft 6 are connected to the fixed jacket 3 according to the physique and preference of the driver. The height of the steering wheel can be adjusted by turning it up and down around a pivot point (not shown) to the vehicle body, and the movable jacket 2 and the steering shaft 6 are moved in the axial direction to move the steering wheel. The axial position (front-rear direction position) can be adjusted.

  That is, as shown in FIGS. 1 and 3, the column bracket 4 is formed with an arc-shaped tilt hole 8 that is long in the vertical direction, and the movable jacket 2 is formed with a telescopic hole 9 that is long in the axial direction. The tilt bolt 5 is inserted through both the tilt hole 8 and the stesco hole 9.

  Therefore, the movable jacket 2, the fixed jacket 3 and the steering shaft 6 are vertically moved around the pivot point (not shown) of the fixed jacket 3 to the vehicle body within the range in which the tilt bolt 5 moves up and down in the tilt hole 8. The steering wheel can be rotated to adjust the height position of the steering wheel (tilt function).

  Further, the movable jacket 2 and the steering shaft 6 can move in the axial direction within a range in which the longitudinal end portion of the telescopic hole 9 abuts against the tilt bolt 5, thereby adjusting the axial position of the steering wheel. (Telescopic function).

    Therefore, in the present embodiment, the height position and the axial position of the steering wheel are locked by a single center lock mechanism provided at the same height position as the center of the steer shaft 6. The backlash generation can be prevented by adding the backlash pressing mechanism to the center lock mechanism. The configuration of the center lock mechanism provided with the backlash pressing mechanism will be described below.

  As shown in FIG. 3, the tilt bolt (bolt) 5 is disposed horizontally on the side of the same height as the center of the fixed jacket 3 and perpendicular to the column axis, and the tilt bolt 5 is connected to the movable jacket 2. The telescopic hole 9 and the tilt hole 8 are penetrated from the inside, and the slide cam 11, the lever cam 10, the tilt lever 12, and the rotation stopper plate 13 are inserted therethrough. Here, the slide cam 11 is supported so as not to rotate by passing through the tilt hole 8 and engaging with the telescopic hole 9, and the tilt lever 12 is fitted to the lever cam 10 so as to rotate integrally. Yes. Further, the tilt lever 12 is attached with a rotation-preventing plate 13 that is deformed and fitted to the tilt bolt 5 so as to rotate integrally with the tilt lever 12 by a fixing bolt 14. A nut 15 is screwed onto the end of the tilt bolt 5, and the lever cam 10, slide cam 11, tilt lever 12 and detent plate 13 are positioned on the tilt bolt 5 in the axial direction. Claws (not shown) each having a concave portion and a convex portion that selectively engage with each other are formed on opposite surfaces of the cam 11. Therefore, if the tilt lever 12 is rotated, the tilt bolt 5 and the lever cam 10 are rotated integrally therewith, and the claw of the lever cam 10 and the claw of the slide cam 11 are engaged with each other. The tilt bolt 5 moves to the left in FIG. 3, and a rotating cam 17 (described later) formed on the head of the tilt bolt 5 presses the vertical portion of the movable jacket 2 against the vertical portion of the column bracket 4. 2, the vertical movement (tilt) of the fixed jacket 3 and the steering shaft 6 and the longitudinal movement (telescopic) of the movable jacket 2 and the steering shaft 6 are locked.

  On the other hand, as shown in FIGS. 2 and 3, a convex portion 3 </ b> A that partially protrudes toward the direction of the tilt bolt 5 (to the left in FIG. 3) is formed on the side of the center height position of the fixed jacket 3. As shown in FIG. 5, a notch groove 3a that is long in the axial direction (left-right direction in FIG. 5) is formed in the convex portion 3A. The shaft portion 16b of the fixed cam 16 serving as a pressing member is fixed to the cutout groove 3a so as not to rotate by light press fitting. The cutout groove 3a is opened at the front of the vehicle (left end in FIG. 5).

  Here, the convex portion 3A partially formed on the side of the fixed jacket 3, the cutout groove 3a formed in the axial direction in the convex portion 3A, and the shaft portion 16b are lightly press-fitted into the cutout groove 3a. As will be described later, a pressing release means is constituted by a fixed cam 16 that is movable in the axial direction together with the tilt bolt 5, and this pressing release means is used when the column bracket 4 is detached from the vehicle body at the time of a vehicle collision as will be described later. At the same time, it functions to release the pressing of the fixed jacket 3 to the movable jacket 2 by the tilt bolt 5.

  The head of the tilt bolt 5 passes through a telescopic hole 9 formed in the movable jacket 2 and is disposed between the inner surface of the movable jacket 2 and the outer surface of the fixed jacket 3. The rotary cam 17 is integrally formed. Here, as shown in FIG. 4, the fixed cam 16 and the rotating cam 17 are formed in a disc shape, and a circular recess 17 </ b> A for fitting the outer periphery of the fixed cam 16 is formed on the end surface of the rotating cam 17. Has been. And three claws 16a and 17a project from the opposite end surfaces of the fixed cam 16 and the rotating cam 17 at equal angular pitches in the circumferential direction. Two or four claws 16a and 17a may be provided.

  Thus, in the assembled state, as shown in FIG. 3, the fixed cam 16 is positioned by fitting a part of its outer periphery to the circular recess 17 </ b> A of the rotating cam 17. On the outer surface of the fixed jacket 3, a pair of protrusions 3b are provided on the inner surface side of the movable jacket 2 on the opposite side of the convex portion 3A, as shown in FIG. The fixed jacket 3 is in contact with the inner peripheral surface of the movable jacket 2 through the protrusion 3b. Reference numeral 21 denotes a resin guide member for guiding the movement of the movable jacket 2 along the fixed jacket 3.

  By the way, as shown in FIG. 2, slit holes 4a are formed in the left and right ends of the column bracket 4 so as to open the rear of the vehicle (right side in FIG. 2), and resin slits are formed in the respective slit holes 4a. A plate 22 is mounted. The column bracket 4 is detachably attached to the vehicle body by bolts (not shown) inserted through the slit holes 4a and the slide plate 22, and a large impact load (fastening of the bolts) is applied to the front of the vehicle when the vehicle collides. When a load greater than the force) is applied, the vehicle separates from the vehicle body to the front of the vehicle.

  In the vehicle steering apparatus 1 having the center lock mechanism configured as described above, when the tilt lever 12 is in the position shown in FIG. 1, the center lock mechanism is in a locked state, and the movable jacket 2, the fixed jacket 3, and the steering are in the locked state. The vertical tilt (tilt) of the shaft 6 and the axial movement (telescopic) of the movable jacket 2 and the steering shaft 6 are locked.

  That is, when the tilt lever 12 is in the position shown in FIG. 1, the claws of the lever cam 10 and the slide cam 11 are engaged with each other and the slide cam 11 is pressed against the column bracket 4, so that the column bracket 4 and the movable jacket 2 are It is clamped by the slide cam 11 and the rotating cam 17 and the movement of the movable jacket 2 is locked.

  At the same time, the rotation cam 17 is rotated integrally by the rotation of the tilt bolt 5, so that the protrusions of the claw 17a of the rotation cam 17 and the claw 16a (see FIG. 4) of the fixed cam 16 are engaged with each other. Then, the fixed cam 16 moves to the right in FIG. 3, the outer surface of the fixed jacket 3 is pressed against the inner surface of the movable jacket 2, and the pressing force F <b> 1 shown in FIG. 3 is applied to the two protrusions 3 b formed on the fixed jacket 3. It acts on the movable jacket 2. In addition to this, the reaction force F2 shown in the figure acts on the rotary cam 16, and the space between the fixed jacket 3 and the movable jacket 2 is supported at three points in the circumferential direction. The backlash can be prevented and the supporting rigidity can be increased.

  As a result, the movable jacket 2, the fixed jacket 3 and the steering shaft 6 are tilted up and down (tilt) and the axial movement (telescopic) of the movable jacket 2 and the steering shaft 6 is securely locked, and the occurrence of backlash is prevented. The driver who operates the steering wheel does not feel uncomfortable. Further, since the support rigidity of the steering wheel is increased, the steering wheel does not vibrate due to engine vibration, vehicle body vibration during traveling on rough terrain, and the like, and the driver's steering feeling is not impaired.

  Next, when the driver adjusts the height position or the axial position of the steering wheel, the tilt lever 12 at the solid line position in FIG. 1 is rotated in the direction of arrow a (clockwise) to lock the center lock mechanism. Can be canceled.

  That is, when the tilt lever 12 is rotated in the direction of arrow a in FIG. 1, the tilt bolt 5, the lever cam 10, and the rotating cam 17 rotate integrally therewith. Engagement by the convex portion is released, and the engagement between the convex portion and the convex portion of the claw 17a of the rotating cam 17 and the claw 16a (see FIG. 4) of the fixed cam 16 is released. As a result, the column bracket 4 and the movable jacket 2 The sliding cam 11 and the rotating cam 17 are released, and the pressing force F1 applied to the movable jacket 2 by the fixed jacket 3 and the reaction force F2 acting on the rotating cam 17 are released. Therefore, the movable jacket 2, the fixed jacket 3 and the steering shaft 6 are tilted up and down and the axial movement (telescopic) of the movable jacket 2 and the steering shaft 6 is unlocked (unlocked). It is possible to arbitrarily adjust the height position and the axial position. After the adjustment, if the tilt lever 12 is rotated in the direction of arrow b (counterclockwise) in FIG. 1 and returned to the solid line position, it is locked by the center lock mechanism and the height position and axial position of the steering wheel are fixed. Is done.

  By the way, when an axial load is applied to the steering wheel from the driver at the time of a vehicle collision, the axial load is transmitted to the movable jacket 2 via the steering shaft 6, so that the column bracket 4 resists the fastening force to the vehicle body thereafter. Then, it moves to the front of the vehicle together with the movable jacket 2 and leaves the vehicle body, and the energy consumed by the separation of the column bracket 4 is absorbed to protect the driver from the impact.

  As described above, when the column bracket 4 moves forward of the vehicle, the tilt bolt 5 inserted through the column bracket 4 moves in the same direction, and the fixed cam 16 moves together with the tilt bolt 5 so that the column bracket 4 At the same time as the detachment from the vehicle body, the shaft portion 16b of the fixed cam 16 is disengaged from the cutout groove 3a formed in the convex portion 3A of the fixed jacket 3. For this reason, the axial force of the tilt bolt 5 is released, and the pressing of the fixed jacket 3 to the movable jacket 2 by the tilt bolt 5 is released, and the movable jacket 2 is attached to the fixed jacket 3 together with the steering shaft 6 and the steering wheel. The column bracket 4 can be detached from the vehicle body.

  Therefore, by adjusting the pressing force of the fixed cam 16 that is a pressing member to the fixed jacket 3, the timing at which the fixed cam 16 is separated from the fixed jacket 3 and the load when the fixed jacket 3 is contracted can be adjusted. It is possible to deal with various vehicles.

  In the present embodiment, the movable jacket 2 is integrally formed as one part, but as shown in FIG. 6, the movable jacket 2 is composed of two parts, a cylindrical member 2A and a channel member (distant bracket) 2B. However, both may be integrated by welding.

  In the present embodiment, the fixed jacket 3 is provided with the convex portion 3A and the fixed cam 16 is fixed. However, the fixed cam 16 is directly fixed to the outer surface of the fixed jacket 3 without providing the convex portion 3A. Also good. Furthermore, in the present embodiment, the pair of protrusions 3b are provided on the outer surface of the fixed jacket 3, but a pair of protrusions may be provided on the inner surface of the movable jacket 2 so as to protrude toward the fixed jacket 3 side. .

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG.

  FIG. 7 is a cross-sectional view of the vehicle steering apparatus according to Embodiment 2 of the present invention. In FIG. 7, the same elements as those shown in FIG. Description of is omitted.

  The center lock mechanism of the present embodiment is fitted so that the tilt bolt 5 passes through the tilt lever 12, the lever cam 10, the slide cam 11, and the tilt hole 8 of the column jacket 4 so as not to rotate into the telescopic hole 9 of the movable jacket 2. A rotation-preventing plate 13 that is screwed into the nut member 19 from the outside of the movable jacket 2 and is deformed and fitted to the head of the tilt bolt 5 so that the tilt bolt 5 rotates integrally with the tilt lever 12; A fixing bolt 14 for fixing the plate 13 to the tilt lever 12 is provided.

  Further, the ratchet holding mechanism is formed with a convex portion 3A so as to partially protrude toward the center height position side portion of the fixed jacket 3, and the convex portion 3A has an axial direction as in the first embodiment. A long notch groove 3a is formed. The tilt member 5 is fixed to the long notch groove 3a so as not to rotate through the shaft portion 18a of the bearing member 18 as a pressing member, and passes through the nut member 19 and protrudes to the inside of the movable jacket 2. The end portion is rotatably fitted in a recess provided on the side surface of the bearing member 18. In the present embodiment, an elastic member 20 such as a disc spring inserted through the shaft portion 18 a is interposed between the bearing member 18 and the fixed jacket 3. The notch groove 3a is open at the front of the vehicle.

  Thus, when the tilt lever 12 is rotated in the locking direction (the direction of the arrow b in FIG. 1), the tilt bolt 5 and the lever cam 10 are rotated integrally therewith. The tilt bolt 5 moves to the left in FIG. 7 by engaging the convex portion with the convex portion, and the vertical portion of the movable jacket 2 and the vertical portion of the column bracket 4 are held between the slide cam 11 and the nut member 19. Therefore, the vertical movement (tilt) of the movable jacket 2, the fixed jacket 3, and the steering shaft 6 and the axial movement (telescopic) of the movable jacket 2 and the steering shaft 6 are locked. At the same time, when the tilt bolt 5 rotates, the tilt bolt 5 screwed into the nut member 19 moves so as to protrude into the movable jacket 2, and the outer surface of the fixed jacket 3 is moved through the bearing member 18. 2, the space between the inner surface of the movable jacket 2 and the outer surface of the fixed jacket 3 is supported by the bearing member 18 and the pair of protrusions 3b at three points in the circumferential direction. It is possible to prevent the occurrence of backlash in the direction and increase the support rigidity.

  Further, when an axial load is applied to the steering wheel from the driver in the event of a vehicle collision, the tilt bolt 5 inserted through the column bracket 4 is the same when the column bracket 4 moves forward of the vehicle, as in the first embodiment. The bearing member 18 is also moved together with the tilt bolt 5 so that the column bracket 4 is detached from the vehicle body, and at the same time, the shaft portion 18a of the bearing member 18 is formed in the convex portion 3A of the fixed jacket 3. Deviates from 3a. For this reason, the axial force of the tilt bolt 5 is released, and the pressing of the fixed jacket 3 to the movable jacket 2 by the tilt bolt 5 is released, and the movable jacket 2 is attached to the fixed jacket 3 together with the steering shaft 6 and the steering wheel. The column bracket 4 can be detached from the vehicle body.

  Therefore, by adjusting the pressing force of the bearing member 18 that is a pressing member to the fixed jacket 3, the timing at which the bearing member 18 moves away from the fixed jacket 3 and the load adjustment when the fixed jacket 3 contracts can be performed. It becomes possible to correspond to the other vehicle.

  In addition, since the backlash mechanism for the movable jacket 2 is provided, it is possible to increase the support rigidity of the steering wheel by preventing the backlash of the movable jacket 2, and to prevent the steering wheel from being vibrated by the vehicle body vibration and the like. Is enhanced to improve the steering feeling.

  Further, since the elastic member 20 is interposed between the bearing member 18 and the fixed jacket 3, the variation in the size of each part is absorbed by the elastic deformation of the elastic member 20, and the rattling mechanism can be stably operated and moved. The backlash of the jacket 2 is prevented.

  In the above embodiment, the fixed cam 16 whose shaft portion 16b is press-fitted into the cutout groove 3a formed in the convex portion 3A of the fixed jacket 3 is notched in the fixed jacket 3 at the same time as the column bracket 4 is detached from the vehicle body. The shaft portion 16b of the fixed cam 16 is made of resin mold and fixed to the fixed jacket 3, and the column bracket 4 is detached from the vehicle body, and the shaft portion 16b is broken at the same time. The same effect as described above can be obtained.

  In the above, the embodiment in which the present invention is applied to a vehicle steering apparatus having a tilt and telescopic function has been described. However, the present invention can be applied to all vehicle steering apparatuses having at least a telescopic function. It is.

1 is a cutaway side view of a main part of a vehicle steering device according to Embodiment 1 of the present invention. 1 is a plan view of a main part of a vehicle steering device according to Embodiment 1 of the present invention. It is the sectional view on the AA line of FIG. It is a perspective view which shows the fixed cam and rotation cam which comprise the center lock mechanism of the steering apparatus for vehicles which concerns on Embodiment 1 of this invention. It is a fragmentary perspective view which shows the press fit structure to the fixed jacket of the rotating cam of the steering device for vehicles which concerns on Embodiment 1 of this invention. FIG. 5 is a view similar to FIG. 4 showing a modification of the vehicle steering device according to Embodiment 1 of the present invention. It is a cross-sectional view of the vehicle steering device according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle steering device 2 Movable jacket 2A Tubular member of movable jacket 2B Channel member of movable jacket 3 Fixed jacket 3A Convex part of fixed jacket 3a Notch groove of fixed jacket 3b Protrusion of fixed jacket 4 Column bracket 4a Slit hole 5 Tilt bolt 6 Steering shaft 7 Bearing 8 Tilt hole 9 Telescopic hole 10 Lever cam 11 Slide cam 12 Tilt lever 13 Non-rotating plate 14 Fixing bolt 15 Nut 16 Fixing cam (pressing member)
16a Fixed cam claw 16b Fixed cam shaft 17 Rotating cam 17a Rotating cam claw 18 Bearing member (pressing member)
19 Nut member 20 Elastic member 21 Guide member 22 Slide plate F1 Pressing force F2 Reaction force

Claims (2)

A movable jacket that rotatably supports the steering shaft is supported on a column bracket fixed on the vehicle body side through a lock mechanism having bolts so that the movable jacket can be adjusted in the vertical direction or the axial direction. In the vehicle steering device configured to insert a fixed jacket and to disengage the column bracket from the vehicle body when a load of a predetermined value or more acts on the steering shaft,
A backlash mechanism is provided between the inner surface of the movable jacket and the outer surface of the fixed jacket, which are opposed to each other, to push the fixed jacket toward the movable jacket by rotating the bolt, and the column bracket is detached from the vehicle body. At the same time, the vehicle steering apparatus is provided with a pressure releasing means for releasing the pressing of the fixed jacket by the bolt.   The pressing release means includes a convex portion partially formed on a side portion of the fixed jacket, a notch groove formed in the convex portion in the axial direction, and lightly press-fitted into the notch groove and axially together with the bolt. The vehicle steering device according to claim 1, wherein the vehicle steering device is configured by a pressing member that can move in a straight line.

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