JP2004082846A - Steering column device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the clamp/unclamp mechanisms of a telescopic mechanism and tilting mechanism to be operated by means of a single lever in a steering column device, and enhance reliability and operability by eliminating a part protruding from the steering column device. <P>SOLUTION: When an operating lever 7 is forwardly pulled and rocked about a lever center shaft 72, clamping of a tilt head 4 is released. On the other hand, rocking of the operating lever 7 rocks a pressure plate 73, presses down a pressure rod 74, and rotates a column clamp shaft 6 through a rocking arm 61. The column shaft 6 is rotated to release clamping, so that a column head 31 is enabled to move. recessed and projecting parts 601, 602 for preventing slipping to a clamp 21 at the time of clamping are formed on the column clamp shaft 6. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a steering column device, particularly to a steering column device for a vehicle having a telescopic mechanism and a tilting mechanism.
[0002]
[Prior art]
The telescopic mechanism and the tilting mechanism are mechanisms for adjusting the height and the inclination angle of the steering wheel to a position where driving is most easily performed according to the body shape and preference of the driver.
[0003]
The telescopic mechanism and the tilting mechanism are provided with a clamp / unclamp mechanism operated when adjusting the height of the steering wheel and the tilt angle. The unclamping mechanism is released, the height and the inclination angle are adjusted in that state, and then the state is again clamped.
[0004]
Since the adjustment of the height and the inclination angle of the steering wheel is performed by operating the steering wheel by hand, it is preferable that the clamp / unclamp mechanism can be operated without releasing the hand from the steering wheel. GB 2 281 375 discloses a steering column device provided with a single operating handle which can be operated with the hand on the steering wheel.
[0005]
In the steering column device of the above-mentioned British patent, the movement of the operating handle is transmitted to a height adjusting clamp device via a cable movable in a flexible tube. The cable and its tubing are provided with a large deflection so as to provide a sufficiently small curvature to allow the cable to move freely over the entire adjustment range of the steering wheel. As a result, a part of the steering column device protrudes toward the outside of the steering column device, which is not only unsightly but also causes a trouble. Further, the power transmission mechanism composed of the cable and its tube is not only poor in reliability but also poor in operability because the cable expands and contracts.
[0006]
In order to cope with such a problem, the present inventors have made it possible to operate each clamp / unclamp mechanism of the telescopic mechanism and the tilting mechanism with a single lever provided near the steering wheel, and to protrude from the steering column device. A steering column device (Japanese Patent Application No. 2002-146694) provided with a clamp / unclamp mechanism having no parts, high reliability, and good operability was proposed.
[0007]
[Problems to be solved by the invention]
Clamping in the telescopic mechanism including this steering column device is performed by frictional force. As described above, since the clamp uses the frictional force, when a large force is applied, slipping easily occurs at the clamp portion. In recent years, airbags have become standard equipment in passenger cars. The airbag is designed on the assumption that when it is activated, it is stably supported by the steering wheel. For this reason, it has been required that the steering wheel does not move at the time of the secondary collision, that is, it does not slip at the clamp portion of the telescopic mechanism due to the force received from the secondary collision.
[0008]
In view of such circumstances, an object of the present invention is to provide a steering column device in which the clamp portion is unlikely to slip due to a force received from a secondary collision by improving the above-described invention of the inventors. is there.
[0009]
[Means for Solving the Problems]
The above problem is solved by the following means. That is,
According to a first aspect of the present invention, there is provided a fixed column member having a vehicle body mounting portion for mounting to a vehicle body, a movable column member supported by the fixed column member so as to be non-rotatable about a central axis and movable in a central axis direction. A column head provided at one end of the movable column member, a tilt head supported to be tiltable by the column head, a wheel shaft rotatably supported by the tilt head, and fixed to a steering wheel at one end; A column clamp shaft having a non-circular cross-section provided on the column head and rotatable about an axis parallel to a central axis of the moving column member and immovable with respect to the column head; The movable column member can be moved by the rotation of the column clamp shaft. A column clamp for clamping / unclamping a fixed column member, a tilt head clamp for clamping / unclamping the tilt head to the column head, and an operation having a swing support shaft for the tilt head A steering column device including a lever and a mechanical transmission device for converting the swing of the operation lever into rotation of the column clamp shaft and transmitting the rotation to the column clamp, and transmitting the rotation to the tilt head clamp. The column clamp has an inclined surface facing the movable column member, and moves the first and second wedges slidably supported by the fixed column member in directions approaching each other. Therefore, a clamp bar fixed to the first wedge and a clamp bar The column clamp shaft is located between the second wedge and the reaction force member, and each of the surfaces contacting the column clamp shaft is formed with unevenness that engages with each other. A steering column device characterized by the following.
[0010]
According to a second aspect of the present invention, in the steering column device according to the first aspect, the mechanical transmission device includes a pusher plate, a pusher rod, and a swing arm. The push lever is provided on the operation lever, and can be brought into contact with one end of the pusher rod. The pusher rod is slidable in a direction parallel to a tilt center axis of the tilt head, and is supported by the column head. The swing arm has one end engaged with the pusher rod and the other end fixed to the column clamp shaft. When operating the operation lever, the operation lever swings the pusher plate. Oscillating motion, axial motion of the pusher rod, oscillating motion of the oscillating arm, and the column clamp shaft A steering column device, characterized in that it is sequentially converted into rotary motion.
[0011]
A third aspect of the present invention is the steering column device according to the second aspect, wherein the pusher rod is provided with an urging spring for urging the pusher rod toward the pusher plate. Steering column device.
[0012]
According to a fourth aspect of the present invention, in the steering column device according to the third aspect, the biasing spring moves the operation lever away from the steering wheel when the operation lever is not operated. A steering column device for applying a force for maintaining a column clamp and the tilt head clamp at respective clamp positions.
[0013]
According to a fifth aspect of the present invention, in the steering column device according to any one of the first to fourth aspects, the non-circular cross section of the column clamp shaft is movable by the movable column member. A steering column device characterized by being longer than the length.
[0014]
According to a sixth aspect of the present invention, in the steering column device according to any one of the first to fifth aspects, the non-circular cross section has a substantially elliptical shape, and the long diameter portion has the irregularities. A steering column device.
[0015]
According to a seventh aspect of the present invention, in the steering column apparatus according to the first to sixth aspects, the pusher plate can always contact the pusher rod in the entire tilt range of the tilt head. A steering column device having a sufficiently wide contact surface. An eighth aspect of the present invention is the steering column device according to any one of the first to seventh aspects, wherein the operation lever is operable with a hand on a steering wheel. Device.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a steering column device 1 according to an embodiment of the present invention.
[0017]
* Overall Overview The steering column device 1 includes a fixed column member 2, a movable column member 3, a column head 31, a tilt head 4, a wheel shaft 5, a column clamp 21, a tilt head clamp 41 (see FIG. 2), an operation lever 7, and A mechanical transmission (a mechanism for transmitting the movement of the operation lever 7 to the rotation of the column clamp shaft 6 of the column clamp 21 via the pusher plate 73, the pusher rod 74, and the swing arm 61).
[0018]
The fixed column member 2 is provided with vehicle body attachment portions 221 and 222, and is attached to the vehicle body 91 by the vehicle body attachment portions 221 and 222. The movable column member 3 is supported by the fixed column member 2 so as to be non-rotatable about the central axis and movable in the central axis direction. A column head 31 is provided at one end of the movable column member 3, and the tilt head 4 is supported on the column head 31 so as to be tiltable about a tilt center axis 43. A wheel shaft 5 is rotatably supported by the tilt head 4, and a steering wheel 92 is fixed to one end of the wheel shaft 5.
[0019]
The column head 31 is provided with a column clamp shaft 6 rotatable around an axis parallel to the central axis of the movable column member 3 and immovable with respect to the column head. The fixed column member 2 is provided with a column clamp 21. The column clamp 21 is movable with respect to the column clamp shaft 6. The rotation of the column clamp shaft 6 causes the movable column member 3 to move. It can be in a clamp / unclamp state.
[0020]
The column head 31 is provided with a tilt head clamp 41 (FIG. 2), which clamps / unclamps the tilt head 4 with respect to the column head 31. An operation lever 7 is supported on the tilt head 4 by a swing support shaft. The operation lever 7 can be operated with a hand on the steering wheel 92. The swing of the operation lever 7 is converted into rotation of the column clamp shaft 6 via a mechanical transmission device, and the rotation is transmitted to the column clamp 21, and the movable column member 3 is clamped / unclamped. Further, the swing of the operation lever 7 is also transmitted to the tilt head clamp 41, and the tilt head 4 is clamped / unclamped.
[0021]
One end of the wheel shaft 5 is connected to a universal joint 931 in the steering column device 1, and further connected to a pair of upper intermediate shafts 941 and lower intermediate shafts 942 (FIG. 3) and a lower universal joint 932 which are splined. Via a mechanism for operating the direction of the front wheels. Note that the dotted lines in FIG. 1 show some examples of positions and postures that the steering wheel 92 can take by adjustment.
[0022]
* Tilt head clamp FIG. 2 is an enlarged view of a main part of FIG. 1 with a part of the steering column device 1 cut away. FIG. 3 is a partially cutaway top view when the steering column device 1 is viewed from above (P direction) in FIG. FIG. 4 is a bottom view when the steering column device 1 is viewed from below (from the Q direction) in FIG. FIGS. 5, 6, and 7 are cross-sectional views taken along lines AA, BB, and CC in FIG. 2, respectively.
[0023]
The tilt head clamp 41 has the following configuration. A segment gear 33 having a center at a tilt center shaft 43 is fixed to the movable column member 3 by bolts 34, and a back support member 341 is provided with a space between the segment gear 33 and the segment gear 33. On the other hand, a gear portion 442 of the gear arm 44 rotatably supported on the tilt head 4 about the shaft 441 and a protrusion 71 provided on the operation lever 7 enter the space.
[0024]
The gear arm 44 has an L-shape including two legs, and the gear portion 442 is formed on one leg. A spring 711 is interposed between the other leg 443 of the gear arm 44 and the back of the protruding portion 71, and provides a bias to push the gap between the back of the protruding portion 71 and the leg 443.
[0025]
Due to this bias, the protruding portion 71 is pushed to the left and the gear portion 442 is pushed from behind, so that the gear portion 442 is pressed toward the segment gear 33 and the respective teeth mesh with each other. When pushing the gear portion 442 against the segment gear 33, the reaction force applied to the protrusion 71 is received by the backrest member 341 (FIGS. 2, 5, and 6). As a result, the tilt head 4 is fixed. The tilt head 4 is fixed at a stepwise position at an angular position where the gear portion 442 and the segment gear 33 can mesh with each other.
[0026]
When the protrusion 71 of the operation lever 7 moves rightward in FIG. 2, the gear arm 44 rotates counterclockwise in FIG. 2 by the pressing force of the spring 711, so that these teeth are disengaged. Therefore, when the tilt position is adjusted (the telescopic position is also adjustable at this time), the operation of the operation lever 7 causes the protruding portion 71 to move rightward.
[0027]
* Universal Joint and Intermediate Shaft As shown in FIG. 3, an upper universal joint 931 is formed between the end of the upper intermediate shaft 941 and the end of the wheel shaft 5. Since the center of the universal joint 931 is located on the axis of the tilt center shaft 43, the tilt head 4 is not affected by tilting.
[0028]
Since the lower intermediate shaft 942 is rotatably supported by the fixed column member 2 and the lower intermediate shaft 942 and the upper intermediate shaft 941 are spline-coupled, the movable column member 3 can move in the left-right direction in FIG. ing. The rotation of the upper intermediate shaft 941 can be transmitted to the lower intermediate shaft 942 irrespective of the movement position by the spline connection. Even if the height of the steering wheel 92 is adjusted, the rotation of the steering wheel 92 is transmitted to the lower intermediate shaft 942. Can be transmitted to.
[0029]
* Fixed Column Member and Moving Column Member As shown in FIG. 2, the cylindrical portion of the moving column member 3 is formed with an elongated hole 32 along the axial direction. The provided stopper member 22 is engaged. Since the movable column member 3 is prevented from coming out of the fixed column member 2 and rotating with respect to the fixed column member 2 by the elongated hole 32 and the stopper member 22, the movable column member 3 can be axially moved within the fixed column member 2 within the range of the elongated hole 32. It has become.
[0030]
The fixed column member 2 has a cylindrical portion 231, and ring-shaped sliding guide portions 232 are provided at two positions inside the cylindrical portion 231 (FIG. 3). The outer surface of the cylindrical portion of the movable column member 3 is movable by the sliding guide portion 232 in the axial direction of the movable column member 3 without play. The cushioning stopper 311 provided on the end face of the column head 31 is provided with rubber, which is provided to prevent an impact collision between metals when the movable column member 3 collides with the end face of the fixed column member 2 during adjustment. It is a cushioning material made of synthetic resin or the like.
[0031]
* Column Clamp The configuration of the column clamp 21 will be described with reference to FIGS. 7, 8, 9, and 12. FIG. FIG. 7 is a cross-sectional view taken along the line CC in FIG. 2 as described above, and FIGS. 8 and 9 are partially enlarged views in FIG. 7, showing the relationship between the rotational position of the column clamp shaft 6 and the clamp / unclamp state. Is shown. FIG. 12 is a partially enlarged view of FIG. 4 showing the vicinity of the column clamp shaft 6 and the column clamp 21 in an enlarged manner. The column clamp 21 is provided on the fixed column member 2 and includes a first wedge 211, a second wedge 212, a clamp bar 213, and reaction members 2141 and 2142. The fixed column member 2 is provided with a wedge hole 215 from the lateral direction, and a part of the wedge hole 215 is opened to a cavity of the fixed column member 2. Each of the first wedge 211 and the second wedge 212 has an inclined surface 2111, 2112, and is housed in the wedge hole 215 such that the inclined surfaces 2111, 2112 face each other. The inclined surfaces 2111, 2112 of the two wedges face the outer periphery of the cylindrical portion of the movable column member 3.
[0032]
The first wedge 211 and the second wedge 212 are provided with clamp bar holes 2113 and 2114, respectively, and the clamp bar 213 penetrates these holes. At both ends of the clamp bar 213, reaction force members 2141 and 2142 having a larger outer diameter than the clamp bar holes 2113 and 2114 are fixed. A column clamp shaft hole 216 is formed in the clamp bar 213 so as to contact one reaction member 2142, and a substantially elliptical non-circular cross-sectional portion of the column clamp shaft 6 penetrates this hole. .
[0033]
A swing arm 61 is fixed to one end of the column clamp shaft 6. The non-circular cross section of the column clamp shaft 6 is inclined in the elliptical major axis direction as shown in FIG. 8 during unclamping, and the major axis direction is oriented in the axial direction of the clamp bar 213 as shown in FIG. With this configuration, when the swing arm 61 is given a swing rotation from the state shown in FIG. 8, the column clamp shaft 6 is rotated, and the state shown in FIG. 9 is obtained. At this time, when the reaction force member 2142 is pushed leftward on one of the elliptical major diameter portions, the clamp bar 213 is pulled leftward, and the reaction force member 2141 pushes the first wedge leftward. On the other hand, the second wedge is pushed rightward by the other one of the elliptical major diameter portions. As a result, the two wedges approach each other, so that the respective inclined surfaces 2111, 2112 press the outer periphery of the cylindrical portion of the movable column member 3, and the movable column member 3 is clamped against the fixed column member 2. .
[0034]
The end face of the second wedge 212 facing the column clamp shaft 6 and the major diameter portion of the column clamp shaft 6, that is, the portion facing the second wedge 212 are formed with irregularities 2121 and 601 respectively. These irregularities are formed in shapes that can engage with each other. With this structure, the clamp 21 can receive the axial force applied to the column clamp shaft 6 because these irregularities are engaged at the time of clamping. For this reason, a part of the force applied to the wheel shaft 5 at the time of the secondary collision is transmitted to the clamp 21 via the column clamp shaft 6 and received here. Note that the first wedge 211 and the second wedge 212 can move left and right as a unit as a unit, so that there is no imbalance that only one wedge strongly presses the moving column member 3.
[0035]
When the swing arm 61 is swung and rotated in the opposite direction, the first wedge 211 and the second wedge 212 are separated from each other by the reverse movement, and the clamp of the movable column member 3 is released.
[0036]
* Interlocking movement with operation lever Next, each member interlocked by the movement of the operation lever 7 will be described. The operating lever 7 is located below the steering column device 1. FIG. 3 shows the operating lever 7, a lever center shaft 72 serving as a center of the swing, a pusher plate 73 fixed to the operating lever 7, and a pusher rod. 74 is partially visible. FIG. 4 when viewed from below shows the entire operation lever 7 and the case where the operation lever 7 is operated to adjust the height and the inclination (that is, the operation end 701 of the operation lever 7 is connected to the steering wheel 7). (When attracted toward 92) is shown by a solid line (dotted line is at the time of non-operation).
[0037]
The pusher rod 74 having the flange 742 is slidably supported on the column head 31 in a direction parallel to the tilt center axis 43. An urging spring 741 for urging the flange 742 to the left in FIG. 10 penetrates the pusher rod 74, and a small elongated hole 743 that is long in the right angle direction is provided at the end of the urging spring 741. An end of the pusher rod 74 is axially engaged with one end of the swing arm 61 via the elongated hole 743. The long hole 743 is for absorbing the amount of displacement of the position relative to the swing arm 61 when the pusher rod 74 moves in the axial direction.
[0038]
When the urging spring 741 urges the pusher rod 74 to the left, the left end of the pusher rod 74 always contacts the pusher plate 73, and the swing arm 61 axially engaged with the right end thereof rotates clockwise. An urging force has been applied. The swing urging force applied to the swing arm 61 keeps the column clamp shaft 6 at the clamp position (FIG. 9, note that the directions are different between FIGS. 9 and 10 so that the right and left are reversed). The position of the swing arm 61 at this time is shown by a solid line.
[0039]
* Since the pusher plate tilt head 4 tilts on the column head 31, the positional relationship of the pusher rod 74 with respect to the pusher plate 73 changes according to the amount of tilt (angle). In FIG. 11, two positions where the tilt head 4 is tilted are indicated by a dotted line and a solid line. The position of the pusher rod 74 is not changed by tilting because it is supported by the column head, but the relative position with respect to the pusher rod 74 changes when the tilt head 4 is tilted because the pusher plate 73 is separated from the tilt center axis 43. I do. For this reason, the pusher plate 73 has a wide contact surface shape bent like a hockey stick so that the pusher rod 74 contacts the pusher plate 73 at any angle position.
[0040]
* Adjusting operation of steering wheel Hereinafter, the operation for adjusting the height and the inclination angle of the steering wheel 92 and the operation of each member will be described. The driver extends his forefinger to his little finger while holding his hand (thumb) on the steering wheel 92 and pulls the operation lever 7 toward the user (FIG. 3). As a result, the operation lever 7 swings around the lever center axis 72 as shown in FIG. 4 (FIG. 4 is a view seen from below, so that the operation lever 7 is reversed left and right).
[0041]
By the swing of the operation lever 7, the protrusion 71 moves to the right in FIG. 2, and the gear arm 44 rotates counterclockwise. The rotation of the gear arm 44 disengages the teeth of the segment gear 33 from the teeth of the gear portion of the gear arm 44, and the tilt head 4 can be tilted (FIG. 2).
[0042]
At the same time, the swing of the operation lever 7 causes the pusher plate 73 to swing (FIG. 4). By this swing, the pusher plate 73 overcomes the urging spring 741 and pushes the pusher rod 74 upward in the drawing (FIG. 4). The above movement is a rightward movement of the pusher rod 74 in FIG.
[0043]
The rightward movement of the pusher rod 74 causes the swing arm 61 to swing, and thus the column clamp shaft 6 to rotate. When the column clamp shaft 6 rotates, the column clamp shaft 6 whose long diameter portion has been horizontal as shown in FIG. 9 is inclined as shown in FIG. As a result, the first wedge 211 and the second wedge 212 approaching as shown in FIG. 7 are separated from each other, so that the clamp of the movable column member is released.
[0044]
In this manner, the tilt head 4 can be tilted and the column head 31 can be moved in the height direction, so that the driver does not release his hand from the steering wheel 92 and the operation lever 7 and the height position and the tilt position of the steering wheel 92. Can be adjusted. When the tilt head clamp 41 is released, a downward force acts on the tilt head 4 as if the person were to bow his or her neck due to its weight. For this reason, a strong counter-balance spring 45 (FIG. 4) is provided to offset such a force, or furthermore, to make the steering wheel 92 uppermost inclined so as to make it easier for the driver to get on and off. A force is applied to the tilt head 4 to maintain the position.
[0045]
When the adjustment is completed and the finger on the operation lever 7 is released, the operation lever 7 returns to the original position (the position indicated by the solid line in FIG. 3) by the force of the urging spring 741 (and the spring 711). When the operation lever 7 returns to the original position, the tilt head 4 and the column head 31 (movable column member 3) are both clamped by the reverse operation. When an axial force is applied to the column clamp shaft 6 by the engagement between the unevenness 2121 and the unevenness 601, the force is received by the clamp 21. When the operation lever 7 is not operated, the urging spring 741 is used to maintain the operation lever 7 at a position away from the steering wheel 92 and to maintain the column clamp 21 and the tilt head clamp 41 at the respective clamp positions. Has been granted.
[0046]
If the operation portion (tip portion) of the operation lever 7 is excessively approached to the steering wheel 92, the operation of the steering wheel at the time of driving may be hindered by interference. Therefore, when the height and angle of the steering wheel are not adjusted, the operation unit is set at a position away from the steering wheel by an appropriate distance. Further, in order to more reliably prevent such interference, the operation lever 7 may be configured to be foldable or extendable.
[0047]
In order to make the engagement between the column clamp shaft 6 and the clamp 21 stronger, not only the unevenness 601 but also the unevenness 602 can be provided on the other long diameter portion of the column clamp shaft 6 as shown in FIG. . In this case, on the end face of the reaction member 214 facing the column clamp shaft 6, irregularities 2143 having a shape engageable with the irregularities 602 are formed. Since the concave-convex engagement is performed on both sides, the clamp 21 can receive a larger force.
[0048]
In the above embodiment, each of the clamp / unclamp mechanisms of the telescopic mechanism and the tilting mechanism can be operated by a single lever provided in the vicinity of the steering wheel, and the portion that protrudes unsightly from the steering column device because no cable is used. And the occurrence of troubles can be suppressed, and the reliability and operability can be improved. Furthermore, the force that the steering wheel receives from the secondary collision not only clamps the moving column member directly, but also a part of it is received via the column clamp shaft. Is less likely to occur.
[0049]
【The invention's effect】
According to the present invention, each of the clamp / unclamp mechanisms of the telescopic mechanism and the tilting mechanism can be operated by a single lever provided in the vicinity of the steering wheel. There is an effect that the occurrence of troubles can be suppressed, and the reliability and operability can be improved. Furthermore, the force that the steering wheel receives from the secondary collision not only clamps the moving column member directly, but also a part of it is received via the column clamp shaft. This has the effect of reducing the risk of occurrence.
[Brief description of the drawings]
FIG. 1 is an external view of a steering column device 1 according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG. 1 with a part of the steering column device 1 cut away.
3 is a partially cutaway top view when the steering column device 1 is viewed from above (P direction) in FIG.
FIG. 4 is a bottom view when the steering column device 1 is viewed from below (from the Q direction) in FIG. 2;
FIG. 5 is a sectional view taken along the line AA in FIG. 2;
FIG. 6 is a sectional view taken along line BB in FIG. 2;
FIG. 7 is a sectional view taken along the line CC in FIG. 2;
FIG. 8 is a partially enlarged view of FIG. 7, showing a rotational position of the column clamp shaft 6 in an unclamped state.
FIG. 9 is a partially enlarged view of FIG. 7, showing a rotational position of the column clamp shaft 6 in a clamped state.
FIG. 10 is a sectional view taken along the line DD in FIG. 2;
FIG. 11 is an explanatory diagram showing two positions when the tilt head 4 is tilted by a dotted line and a solid line.
FIG. 12 is a partially enlarged view of FIG. 4 showing the vicinity of a column clamp shaft 6 and a column clamp 21 in an enlarged manner.
FIG. 13 is a partially enlarged view of FIG. 4 showing an enlarged view of the vicinity of the column clamp shaft 6 and the column clamp 21, and is another example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steering column device 2 Fixed column member 21 Column clamp 211 First wedge 2111, 2112 Inclined surface 2113, 2114 Clamp bar hole 212 Second wedge 2121 Irregularity 213 Clamp bar 2141, 2142 Reaction force member 2143 Irregularity 215 Wedge hole 216 Column clamp shaft Hole 22 Stopper member 221, 222 Body mounting part 231 Cylindrical part 232 Sliding guide part 3 Moving column member 31 Column head 311 Buffer stopper 32 Slot hole 33 Segment gear 34 Bolt 341 Backing member 4 Tilt head 41 Tilt head clamp 43 Tilt Center shaft 44 Gear arm 441 Shaft 442 Gear part 443 Leg 45 Spring 5 Wheel shaft 6 Column clamp shaft 61 Swing arms 601 and 602 Unevenness 7 Operation lever 701 Operation end 7 Protrusions 711 spring 72 the lever center shaft 73 pusher plate 74 pusher rod 741 biasing spring 742 flange 743 slot 91 vehicle body 92 steering wheel 931 universal joint 941 on the intermediate shaft 942 below the intermediate shaft

Claims (8)

A fixed column member having a vehicle body mounting portion for mounting on a vehicle body,
A movable column member supported by the fixed column member so as to be non-rotatable about the central axis and movable in the central axis direction;
A column head provided at one end of the moving column member,
A tilt head supported to be tiltable by the column head,
A wheel shaft rotatably supported by the tilt head and fixing a steering wheel to one end;
A column clamp shaft having a non-circular cross-section provided on the column head and rotatable about an axis parallel to a central axis of the moving column member and immovable with respect to the column head;
A column clamp which is movable with respect to the column clamp shaft, and which causes the movable column member to be in a clamp / unclamp state with respect to the fixed column member by rotation of the column clamp shaft;
A tilt head clamp for clamping / unclamping the tilt head with respect to the column head;
An operation lever having a swing support shaft in the tilt head, and
A swing column of the operation lever is converted into rotation of the column clamp shaft and transmitted to the column clamp, and a steering column device including a mechanical transmission device for transmitting to the tilt head clamp.
The above column clamp is
First and second wedges having an inclined surface facing the movable column member and slidably supported by the fixed column member;
In order to move the wedges in a direction approaching each other, a clamp bar fixed to the first wedge,
It consists of a reaction force member provided on the clamp bar,
The steering column device according to claim 1, wherein the column clamp shaft is provided between the second wedge and the reaction member, and irregularities are formed on surfaces of the shafts in contact with each other. The steering column device according to claim 1,
The above mechanical transmission,
It has a pusher plate, pusher rod, and swing arm,
The pusher plate is provided on the operation lever and can contact one end of the pusher rod,
The pusher rod is slidable in a direction parallel to a tilt center axis of the tilt head, and is supported by the column head.
The swing arm has one end engaged with the pusher rod and the other end fixed to the column clamp shaft,
When operating the operation lever, the swing of the operation lever is changed into the swing movement of the pusher plate, the axial movement of the pusher rod, the swing movement of the swing arm, and the rotation movement of the column clamp shaft. The steering column device is sequentially converted to: The steering column device according to claim 2,
A steering column device, wherein the pusher rod is provided with a biasing spring for biasing the pusher rod toward the pusher plate. The steering column device according to claim 3,
When the operation lever is not operated, the biasing spring applies a force for maintaining the operation lever at a position away from the steering wheel and for maintaining the column clamp and the tilt head clamp at the respective clamp positions. A steering column device, characterized in that: In the steering column device according to any one of claims 1 to 4,
A non-circular cross section of the column clamp shaft is longer than a movable length of the movable column member. The steering column device according to any one of claims 1 to 5,
A steering column device, wherein the non-circular cross section is substantially elliptical, and the unevenness is provided in a major diameter portion. The steering column device according to any one of claims 1 to 6,
The steering column device, wherein the pusher plate has a sufficiently large contact surface that can always contact the pusher rod in the entire tilt range of the tilt head. The steering column device according to any one of claims 1 to 7,
The steering column device, wherein the operation lever can be operated while a hand is held on a steering wheel.

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