JP2009227181A - Steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering device with a tilting lock mechanism for surely preventing the movement of a column in a tilting direction during secondary collision, having simple construction with a smaller number of components. <P>SOLUTION: When secondary collision occurs, a side plate 231b of an upper vehicle body mounting bracket is crushed toward the front side of a vehicle body and four sharp-tip protrusions 291 of a rotation preventing part 29 are deeply bitten into a tilting position adjusting slit 23c. Thus, great resistance works on force in an upward tilting direction during the secondary collision to avoid the soaring of an outer column and a column clamping member in the upward tilting direction. The outer column and the column clamping member are smoothly separated from a lower vehicle body mounting bracket toward the front side of the vehicle body together with an upper vehicle body mounting bracket to effectively absorb impact energy during collision and relax impact force on a driver. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a steering device, and more particularly, to a steering device in which a column tilt position can be adjusted and a column collapsively moves forward of a vehicle body during a secondary collision to reduce an impact on a driver.

  In the steering apparatus in which the tilt position can be adjusted, the column is sandwiched between the vehicle body mounting bracket so that the tilt position can be adjusted. After adjusting the tilt position, the clamp is adjusted by rotating the operation lever to tighten the tilt position adjustment long groove formed in the body mounting bracket and the tightening rod inserted through the column. The column is tightened and clamped.

  When the vehicle collides with the steering wheel during a secondary collision and an impact load is applied to the front side of the vehicle body, the vehicle body mounting bracket moves away from the vehicle body and moves to the front side of the vehicle body, reducing the impact load applied to the driver. Like to do.

  However, when the tightening force of the tightening rod is weak, the column may move in the tilt direction at the time of a secondary collision in which the driver collides with the steering wheel. Then, since the impact load to the front side of the vehicle body does not act smoothly at the time of the secondary collision, the vehicle body mounting bracket is not smoothly detached from the vehicle body, and there is a possibility of applying a large impact load to the driver.

  As a tilt lock mechanism for preventing the movement of the column in the tilt direction at the time of such a secondary collision, there are tilt lock mechanisms as shown in Patent Document 1 and Patent Document 2. The tilt lock mechanism of Patent Document 1 is fixed even when a large tightening force is applied to a tightening rod by a rigid fixed cam having a convex portion having an arc length arranged so as to straddle the groove width of the tilt position adjusting long groove. The tilt holding force is increased by preventing the cam from bending.

  Further, in the tilt lock mechanism of Patent Document 2, when a large impact force in the tilt direction acts during a secondary collision, the roller moves into a narrow gap between the tilt position adjusting long groove and the inclined surface of the tilt lock piece, The tilt holding force is increased by the wedge action.

  However, the tilt lock mechanism shown in Patent Document 1 does not necessarily have a sufficient tilt holding force, and the tilt lock mechanism shown in Patent Document 2 increases the number of parts for increasing the tilt holding force and increases the manufacturing cost. There was a fear.

JP 2003-154944 A JP 2006-31338 A

  An object of the present invention is to provide a steering device having a tilt lock mechanism that has a simple structure, has a small number of parts, and can reliably prevent a column from moving in a tilt direction during a secondary collision.

  The above problem is solved by the following means. That is, the first invention is a vehicle body mounting bracket that can be mounted on a vehicle body, a column that is supported by the vehicle body mounting bracket so that a tilt position can be adjusted, and a steering shaft on which a steering wheel is mounted is pivotally supported. In order to clamp and clamp the column to the vehicle body mounting bracket at a desired tilt position, a tilt position adjusting long groove formed in the vehicle body mounting bracket, a tightening rod inserted into the column, and a support on one end of the tightening rod A fixed cam that presses one side surface of the vehicle body mounting bracket against the column; a movable cam that is rotatably supported with an operation lever at one end of the clamping rod so as to face the fixed cam; and the fixed cam and the movable cam. The movable cams are provided on opposite surfaces, and the movable cams are relatively shafts relative to the fixed cams. A cam surface that presses in the direction, formed on the fixed cam to make the fixed cam non-rotatable with respect to the movable cam, and fitted in the long groove for tilt position adjustment to adjust the tilt position of the column Non-rotating portion slidable along the tilt position adjusting long groove, and formed on the non-rotating portion to prevent the column from being flipped up to the upper side of the tilt. A steering device characterized by comprising a protrusion having a sharp tip that can bite into the long groove for tilt position adjustment with an impact force.

  According to a second aspect of the present invention, in the steering device according to the first aspect of the invention, the protrusion with a sharp tip is both on the vehicle body front side and the vehicle body rear side of the detent part and above the tilt of the detent part. The steering apparatus is characterized by being formed on both the side and the tilt lower side.

  According to a third aspect, in the steering device according to the first aspect, the protrusion with a sharp tip is on both the vehicle body front side and the vehicle body rear side of the detent portion and above the tilt portion of the detent portion. The steering device is characterized in that the steering device is formed at the intermediate side between the tilt side, the tilt lower side, and the tilt upper side and the tilt lower side.

  According to a fourth aspect of the present invention, in the steering device according to the first aspect of the invention, the protrusion with the sharp tip is on both the vehicle body front side and the vehicle body rear side of the anti-rotation part and above the tilt of the anti-rotation part. The steering device is characterized by being formed at an intermediate position between the side and the tilt lower side.

  According to a fifth aspect of the present invention, in the steering device according to any one of the first to fourth aspects, the anti-rotation portion is covered with a resin guide that reduces friction between the long groove for tilt position adjustment. This is a steering device.

  According to a sixth aspect of the present invention, in the steering device according to any one of the first to fourth aspects, the outer periphery of the anti-rotation portion is molded as a separate part from the anti-rotation portion and has a pointed tip. A steering device characterized in that a protruding member having a protrusion is fitted on the outside.

  According to a seventh invention, in the steering device according to any one of the first to fourth inventions, when the operation lever performs a clamping operation, the vehicle mounting bracket abuts against an end surface of the vehicle body rear side, A steering device is provided with a tilt lock mechanism that restricts movement of the column in the tilt direction by biting into the end surface on the rear side of the vehicle body when an external force in the tilt direction acts on the column.

  In the steering device of the present invention, in order to clamp and clamp the column on the vehicle body mounting bracket at a desired tilt position, the fixed cam is formed on the fixed cam so that the fixed cam cannot be rotated relative to the movable cam. An anti-rotation part that fits in the long groove and is slidable along the long groove for tilt position adjustment when adjusting the tilt position of the column, and an anti-rotation part to prevent the column from being flipped up to the upper side of the tilt It is formed from a protrusion with a sharp tip that can be bitten into the long groove for tilt position adjustment by an impact force forward of the vehicle body at the time of a secondary collision.

  Therefore, when an impact force acts on the front side of the vehicle body during a secondary collision, a projection with a sharp tip bites into the tilt position adjusting long groove, and a large resistance force acts on the tilt upward force generated during the secondary collision. Therefore, the column is not lifted up in the tilt upward direction. Therefore, the column can be smoothly detached from the vehicle body mounting bracket to the front side of the vehicle body, effectively absorbing the impact energy at the time of collision, and mitigating the impact force acting on the driver. In addition, since the structure is simple and the number of parts is small, parts costs are reduced, and manufacturing costs can be reduced.

  In the following embodiments, an example in which the present invention is applied to a tilt / telescopic type steering apparatus that adjusts both the tilt position and the telescopic position of the steering wheel will be described. However, a tilt type steering apparatus that adjusts only the tilt position is described. The present invention may be applied to.

  FIG. 1 is an overall perspective view showing a state in which a steering device 10 of the present invention is attached to a vehicle. As shown in FIG. 1, a hollow cylindrical column 1 is attached to a vehicle body, and a steering shaft 3 is pivotally supported on the column 1 so as to be rotatable. A steering wheel 2 is attached to the steering shaft 3 at the right end (vehicle body rear side), and an intermediate shaft 5 is connected to the left end (vehicle body front side) of the steering shaft 3 via a universal joint 4.

  The intermediate shaft 5 includes a solid intermediate inner shaft 5a in which a male spline is formed and a hollow cylindrical intermediate outer shaft 5b in which a female spline is formed. The male spline of the intermediate inner shaft 5a is connected to the intermediate outer shaft. The 5b female spline is fitted so as to be extendable (slidable) and capable of transmitting rotational torque.

  Further, the vehicle body rear side of the intermediate outer shaft 5 b is connected to the universal joint 4, and the vehicle body front side of the intermediate inner shaft 5 a is connected to the universal joint 6. A pinion that meshes with a rack (not shown) of the steering gear 7 is connected to the universal joint 6.

  When the driver rotates the steering wheel 2, the rotational force is transmitted to the steering gear 7 through the steering shaft 3, the universal joint 4, the intermediate shaft 5, and the universal joint 6, and the tie rod is transmitted through the rack and pinion mechanism. 8 can be moved to change the steering angle of the steering wheel 9.

  FIG. 2 is a front view of the main part showing the steering apparatus of Embodiment 1 of the present invention. FIG. 3 is a perspective view of essential parts showing the tilt / telescopic clamp device, tilt lock mechanism, and telescopic lock mechanism of Embodiment 1 of the present invention, and FIG. 3 (2) is an operation lever and tightening rod from FIG. 3 (1). It is a perspective view which shows the state which removed. 4 shows a state in which the eccentric cam and the rotation transmission shaft of the tilt lock mechanism and the telescopic lock mechanism are extracted from FIG. 3, FIG. 4 (1) is a perspective view, and FIG. 4 (2) is a rotation transmission from FIG. 4 (1). FIG. 4 (3) is a longitudinal sectional view of FIG. 4 (1) showing a state where the shaft is removed.

  FIG. 5 is a perspective view of the main part showing only the tilt / telescopic clamp device with the tilt lock mechanism and telescopic lock mechanism removed from FIG. 3, and FIG. 5 (2) shows the operation lever and clamping rod from FIG. 5 (1). It is a perspective view which shows the state removed. 6 (1) and 6 (2) are perspective views showing a single fixed cam according to the first embodiment of the present invention, and FIG. 6 (2) is a perspective view showing a detent portion on the back side of FIG. 6 (1). is there. FIG. 6 (3) is a perspective view showing an internal fitting state of the tilt position adjusting long groove and the rotation preventing portion on the back side of the fixed cam.

  FIG. 7 is a front view of a main part showing an internal fitting state of the tilt position adjusting long groove and the rotation stopper on the back side of the fixed cam according to the first embodiment of the present invention. 8 is a cross-sectional view taken along the line AA in FIG. FIG. 9 is a front view of essential parts showing a tilt position adjusting long groove when the tilt / telescopic clamp device is unclamped, a detent on the back side of the fixed cam, and an eccentric cam of the tilt lock mechanism. FIG. 10 is a front view of essential parts showing a tilt position adjusting long groove at the time of a secondary collision, a detent on the back side of the fixed cam, and an eccentric cam of the tilt lock mechanism.

  As shown in FIG. 2, the cylindrical column 1 through which the steering shaft 3 is inserted has an inner column 12 fitted inside the outer column 11 so as to be telescopically movable.

  As shown in FIGS. 2, 7, and 8, the outer column 11 is made of an aluminum alloy, and a column clamp member 25 is integrally formed on the vehicle body front side of the outer column 11. The column clamp member 25 extends in the vehicle body lower side of the outer column 11, and through holes 25b and 25b are formed in a pair of side plates 25a and 25a facing the column clamp member 25 in the vehicle width direction. The column clamp member 25 holds the outer peripheral surface 121 of the inner column 12 so as to be telescopically movable.

  The column clamp member 25 is supported by the upper vehicle body mounting bracket 23 via a clamp device 27 so that the tilt position can be adjusted. The front end of the vehicle body of the outer column 11 is supported by the lower vehicle body mounting bracket 24 so as to be swingable in the vertical direction of the vehicle body (within a plane parallel to the plane of FIG. 2) around the pivot pin 24a.

  As shown in FIGS. 2 and 8, the lower vehicle body mounting bracket 24 extends in the longitudinal direction of the vehicle body along the upper portion of the column 1 and is fixed to the vehicle body 13 so as to cover the upper vehicle body mounting bracket 23 from above. Has been. When the driver collides with the steering wheel 2 during a secondary collision and a large impact force is applied, the upper vehicle body mounting bracket 23 is detached from the lower vehicle body mounting bracket 24 toward the vehicle body front side, and an impact energy absorbing member (not shown) is plasticized. It is deformed to absorb the impact energy at the time of collision.

  As shown in FIG. 8, the upper vehicle body mounting bracket 23 includes upper plates 23 a and 23 a that are detachably attached to the lower vehicle body mounting bracket 24 on the front side of the vehicle body, and a pair of side plates 23 b and 23 b. The pair of side plates 23b and 23b are bent downward from the inner ends in the vehicle width direction of the upper plates 23a and 23a so as to form an L shape, and are spaced apart in parallel.

  The side plates 23b and 23b are in contact with each other so as to sandwich the pair of side plates 25a and 25a of the column clamp member 25 from the outside in the vehicle width direction. Between the pair of side plates 25a and 25a, a slit 25c penetrating the inner peripheral hole 251 of the column clamp member 25 is formed. Further, the pair of side plates 23b, 23b includes tilt position adjusting long grooves 23c, 23c formed so that the long axis extends in the vertical direction.

  As shown in FIGS. 2, 5, and 8, the clamp device (tilt / telescopic clamp device) 27 includes long grooves 23 c and 23 c for tilt position adjustment of the upper vehicle body mounting bracket 23, and a through hole 25 b of the column clamp member 25. , 25b, and a tightening rod 27a.

  A fixed cam 27b, a movable cam 27c, an operation lever 27e, a thrust bearing 27d, and an adjustment nut 27f are externally fitted in this order on the screw side of the tightening rod 27a (left side in FIG. 8). A female screw 271f formed in the portion is screwed into a male screw 271a formed at the left end of the tightening rod 27a.

  An operation lever 27e is fixed to the left end surface of the movable cam 27c, and a cam lock mechanism is configured by the movable cam 27c and the fixed cam 27b which are integrally operated by the operation lever 27e. A head portion 28 is formed on the right side of the tightening rod 27a, and the head portion 28 is in contact with the outer surface of the right side plate 23b.

  A rotation preventing portion 281 having a rectangular cross section slightly narrower than the groove width of the right tilt position adjusting long groove 23 c is formed on the left outer diameter portion of the head portion 28. The anti-rotation portion 281 is fitted into the right tilt position adjusting long groove 23c to prevent the tightening rod 27a from rotating with respect to the upper vehicle body mounting bracket 23, and along the right tilt position adjusting long groove 23c when adjusting the tilt position. Then, the tightening rod 27a is slid.

  The fixed cam 27b and the movable cam 27c constitute a cam mechanism that converts the turning operation of the operation lever 27e into the axial movement of the tightening rod 27a. That is, the rotation preventing portion 29 formed on the back side of the fixed cam 27b is inserted into the left tilt position adjusting long groove 23c and is prevented from rotating with respect to the left side plate 23b. The fixed cam 27b slides along the tilt position adjusting long groove 23c. When the operation lever 27e is turned by hand, the movable cam 27c is turned with respect to the fixed cam 27b.

  When the operating lever 27e is rotated in the clamping direction, the peak of the cam surface of the movable cam 27c rides on the peak of the cam surface of the fixed cam 27b, and at the same time pulling the tightening rod 27a to the left side of FIG. Press to the right of.

  The right side plate 23b is pushed to the left in FIG. 8 by the head 28, and the right side plate 23b is deformed inward. The left side plate 23b is pushed to the right by the right end surface of the fixed cam 27b, and the left side plate 23b is deformed inward. Then, the left side plate 23 b strongly presses the left side plate 25 a of the column clamp member 25. At the same time, the right side plate 23 b strongly presses the right side plate 25 a of the column clamp member 25.

  In this manner, the side plates 25a and 25a of the column clamp member 25 can be clamped by clamping the column clamp member 25 by tilting by tightening the side plates 25b and 23b of the upper vehicle body mounting bracket 23. Further, the inner peripheral surface 251 of the column clamp member 25 is reduced in diameter, and the outer peripheral surface 121 of the inner column 12 is tightened by the inner peripheral surface 251 of the column clamp member 25, thereby preventing the outer column 11 from being displaced in the telescopic direction. . Accordingly, the outer column 11 is fixed to the upper vehicle body mounting bracket 23, and displacement of the outer column 11 in the tilt direction and displacement in the telescopic direction are prevented.

  Next, when the driver rotates the operation lever 27e in the tightening release direction, the side plates 23b and 23b of the upper vehicle body mounting bracket 23 are elastically returned in directions opposite to the clamping direction, respectively. Therefore, the outer column 11 is in a free state with respect to the side plates 23b and 23b of the upper vehicle body mounting bracket 23. In this state, the anti-rotation portion 29, the anti-rotation portion 281 and the tightening rod 27a are displaced in the tilt direction while being guided by the tilt position adjusting long grooves 23c and 23c, so that the tilt direction of the steering wheel 2 is arbitrarily adjusted. Can do.

  Here, the clamp device 27 includes a tilt lock mechanism 30 for preventing the column clamp member 25 from moving in the tilt direction at the time of a secondary collision, and a telescopic for preventing the outer column 11 from being displaced in the telescopic direction. A lock mechanism 40 is arranged.

  As shown in FIGS. 3, 4, and 7, the tilt lock mechanism 30 extends in the vehicle width direction of the side plates 25 a and 25 a of the column clamp member 25, and is located on the rear side of the side plates 23 b and 23 b of the upper vehicle body mounting bracket 23. It is disposed at a position facing the end surfaces 231b and 231b, and includes a main drive eccentric cam 31, a driven eccentric cam 33, a rotation transmission shaft 32, and a torsion coil spring.

  The round bar-shaped rotation transmission shaft 32 is rotatably supported (not shown) on the side plates 25 a and 25 a of the column clamp member 25. A through hole 311 formed in the main drive eccentric cam 31 and a through hole 331 formed in the driven eccentric cam 33 are fitted on the outer periphery of the rotation transmission shaft 32 in the vicinity of both ends in the vehicle width direction. Planar notches 321 and 322 are formed in the vicinity of both ends in the vehicle width direction on the outer periphery of the rotation transmission shaft 32, and the partial flat portion 312 and the driven eccentric cam 33 formed in the through hole 311 of the main drive eccentric cam 31. The partial flat surface portion 332 formed in the through hole 331 is engaged, and the rotation of the main drive eccentric cam 31 is transmitted to the driven eccentric cam 33 via the rotation transmission shaft 32.

  A through-hole 411 formed in the eccentric cam 41 of the telescopic lock mechanism 40 is fitted around an intermediate position in the vehicle width direction on the outer periphery of the round rod-shaped rotation transmission shaft 32. Since the through-hole 411 has a cylindrical shape, the eccentric cam 41 is fitted on the outer periphery of the rotation transmission shaft 32 so as to be rotatable. As shown by a two-dot chain line in FIG. 8, the eccentric cam 41 enters between the slits 25 c of the column clamp member 25.

  The main drive eccentric cam 31, the driven eccentric cam 33, and the eccentric cam 41 are plate members that are slightly thicker than the thickness of the side plates 23b, 23b of the upper vehicle body mounting bracket 23 in the vehicle width direction, and the main drive eccentric cam 31, the driven eccentric cam 33, Cam surfaces 313, 333, and 413 are formed on the outer periphery of the eccentric cam 41 so that the distance from the shaft center of the rotation transmission shaft 32 gradually increases in the circumferential direction. Serrated irregularities 314, 334, and 414 are formed, respectively.

  On the outer periphery of the main drive eccentric cam 31, the driven eccentric cam 33, and the eccentric cam 41, relief grooves 315, 335, and 415 are formed following the sawtooth-shaped uneven portions 314, 334, and 414. Further, following the escape grooves 315, 335, 415, stoppers 316, 336, 416 having the longest distance from the axis of the rotation transmission shaft 32 are formed.

  As shown in FIG. 3, one end of the torsion coil spring 34 is locked in the small hole 317 formed in the main eccentric cam 31, and the other end of the torsion coil 34 is locked in the small hole 271e formed in the operation lever 27e. ing. Accordingly, when the operation lever 27e is rotated in the clamping direction (the direction of the solid arrow 272e in FIG. 3A), the main drive eccentric cam 31 is rotated in the direction of the solid arrow 351 in FIGS. To do.

  As a result, the concavo-convex portion 314 of the main drive eccentric cam 31 and the concavo-convex portion 334 of the driven eccentric cam 33 abut against the end surfaces 231b and 231b on the rear side of the vehicle body of the side plates 23b and 23b of the upper vehicle body mounting bracket 23. The column clamp member 25 is prevented from moving in the tilt direction.

  Further, when the operation lever 27e is rotated in the unclamping direction (direction of the broken line arrow 273e in FIG. 3A), the torsion coil spring 34 rotates the main driving eccentric cam 31 in the direction of the solid line arrow 353 in FIG. A gap δ1 is formed between the uneven portion 314 of the cam 31, the uneven portion 334 of the driven eccentric cam 33, and the end surfaces 231b and 231b of the side plates 23b and 23b of the upper vehicle body mounting bracket 23 on the vehicle body rear side.

  As a result, the concavo-convex portion 314 of the main drive eccentric cam 31 and the concavo-convex portion 334 of the driven eccentric cam 33 are separated from the end surfaces 231b and 231b on the vehicle body rear side of the side plates 23b and 23b of the upper vehicle body mounting bracket 23, and the column clamp member 25 tilts. Allows position adjustment.

  As shown in FIGS. 3 and 4, the other small hole 318 formed in the main drive eccentric cam 31, the small hole 418 formed in the eccentric cam 41, and the small hole 338 formed in the driven eccentric cam 33 are substantially the same. A straight bar spring 36 is stretched over. Therefore, when the operating lever 27e is rotated in the clamping direction (the direction of the arrow 272e in FIG. 3A), the eccentric cam 41 is also rotated in the direction of the solid arrow 351 in FIGS.

  As a result, the concavo-convex portion 414 of the eccentric cam 41 abuts on the outer peripheral surface 111 of the outer column 11 (see FIG. 8), thereby preventing the outer column 11 from moving in the telescopic direction during the secondary collision.

  The serrated uneven portions 314, 334, and 414 are disposed so as to contact the end surfaces 231 b and 231 b of the upper vehicle body mounting bracket 23 on the vehicle body rear side and the outer peripheral surface 111 of the outer column 11. The uneven portions 314, 334, and 414 are in a state of being in strong contact with the end surfaces 231 b and 231 b of the upper vehicle body mounting bracket 23 on the rear side of the vehicle body and the outer peripheral surface 111 of the outer column 11. When the main drive eccentric cam 31 and the driven eccentric cam 33 are slightly rotated in the direction of the solid arrow 351 in FIG. 7, the sawtooth uneven portions 314 and 334 are moved. 414 biting occurs.

  Further, since the impact force in the tilt direction of the column clamp member 25 at the time of the secondary collision is large, when the main drive eccentric cam 31 and the driven eccentric cam 33 further rotate in the direction of the solid arrow 351 in FIG. Since the stoppers 316 and 336 having the longest distance from the center bite into the end surfaces 231b and 231b on the vehicle body rear side of the upper vehicle body mounting bracket 23, it is possible to reliably prevent the column clamp member 25 from moving in the tilt direction. Become.

  Similarly, even when the impact force in the telescopic direction of the outer column 11 at the time of the secondary collision is large, the stopper 416 of the eccentric cam 41 bites into the outer peripheral surface 111 of the outer column 11, so that the outer column 11 moves in the telescopic direction. It is possible to reliably prevent the movement.

  As shown in FIGS. 6, 7, 9, and 10, the anti-rotation portion 29 formed on the back side of the fixed cam 27 b includes both the vehicle body front side and the vehicle body rear side of the anti-rotation portion 29, and A total of four protrusions 291, 291, 291, 291 with sharp tips are formed on both the tilt upper side and the tilt lower side of the rotation stopper 29.

  As shown by an arrow 272e in FIG. 3 (1), the operation lever 27e is rotated in the clamping direction, the outer column 11 is fixed to the upper body mounting bracket 23, the displacement of the outer column 11 in the tilt direction, and Prevents telescopic displacement. At this time, as described above, the main drive eccentric cam 31 and the driven eccentric cam 33 bite into the end surfaces 231b and 231b on the vehicle body rear side of the upper vehicle body mounting bracket 23, and the column clamp member 25 is reliably prevented from moving in the tilt direction. Has been.

  When a secondary collision occurs in this state, as shown in FIG. 10 (1), the tilt upward component force 355 acting on the main drive eccentric cam 31 and the driven eccentric cam 33 and the axial direction of the outer column 11 are separated. A resultant force 357 of the force 356 acts on contact points between the main drive eccentric cam 31 and the driven eccentric cam 33 and the end surfaces 231b and 231b of the upper vehicle body mounting bracket 23 on the vehicle body rear side.

  As a result, the side plate 23b of the upper vehicle body mounting bracket 23 is crushed to the front side of the vehicle body by the impact force indicated by the white arrow 354 in the direction perpendicular to the end surfaces 231b and 231b on the vehicle body rear side of the upper vehicle body mounting bracket 23 (see FIG. 10 (2)), the four protrusions 291 having the pointed tip of the rotation stopper 29 deeply bite into the tilt position adjusting long groove 23c.

  Accordingly, since a large resistance force acts on the force in the upward tilt direction generated at the time of the secondary collision, the outer column 11 and the column clamp member 25 are not lifted in the upward tilt direction. Therefore, the outer column 11 and the column clamp member 25 are smoothly separated from the lower vehicle body mounting bracket 24 together with the upper vehicle body mounting bracket 23 toward the front of the vehicle body, and an impact energy absorbing member (not shown) is plastically deformed. The impact energy can be absorbed effectively and the impact force acting on the driver can be reduced.

  Next, a second embodiment of the present invention will be described. FIG. 11 (1) is a front view of the main part showing the long groove for tilt position adjustment, the anti-rotation part on the back side of the fixed cam, and the eccentric cam of the tilt lock mechanism according to the second embodiment of the present invention. It is a perspective view of the resin guide single-piece | unit with which the rotation prevention part of the fixed cam of FIG. 11 (1) was mounted | worn. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The second embodiment is a modification of the first embodiment, in which the rotation preventing portion 29 of the fixed cam 27b is covered with a resin guide that reduces the coefficient of friction with the tilt position adjusting long groove 23c.

  That is, when the rotation preventing portion 29 is slid along the tilt position adjusting long groove 23c when the tilt position of the column 1 is adjusted, the rotation preventing portion 29 is formed with a protrusion 291 having a sharp tip. The protrusion 291 having a sharp point may come into contact with the tilt position adjusting long groove 23c, and in rare cases, contact noise may be generated, or the tilt position adjusting long groove 23c or the pointed protrusion 291 may be worn.

  As shown in FIGS. 11 (1) and 11 (2), a thin resin plate was bent in a U shape between a protrusion 291 with a sharp tip on the upper side of the tilt and a protrusion 291 with a sharp tip on the lower side of the tilt. The resin guide 51 is covered. The plate thickness of the resin guide 51 is preferably set to a thickness that slightly protrudes (0 ≦ δ2) toward the tilt position adjusting long groove 23c side than the tip of the projection 291 having a sharp tip.

  The material of the resin guide 51 is preferably a resin having a small friction coefficient and excellent wear resistance, such as polyacetal, nylon, aramid, PP, PTFE and the like. A round hole 511 is formed in the resin guide 51, the round hole 511 is passed through the tightening rod 27a, and the resin guide 51 is adhered to the rotation stopper 29 with an adhesive or the like. The resin guide 51 may simply be fitted into the rotation stopper 29 without using an adhesive.

  In addition, by forming locking projections 512 and 512 in the resin guide 51 and forming a locking recess (not shown) in the rotation stopper 29, the locking projections 512 and 512 are engaged with the locking recess. Alternatively, the resin guide 51 may be fixed to the rotation stopper 29. Furthermore, the resin guide 51 may be covered by injection molding with the rotation stopper 29 as a core metal.

  If such a resin guide 51 is covered on the anti-rotation portion 29, the protrusion 291 having a sharp tip does not contact the tilt position adjusting long groove 23c at the time of normal tilt position adjustment. There is no possibility that the long groove 23c for tilt position adjustment and the protrusion 291 having a sharp tip are worn. Further, since the resin guide 51 is elastically deformed at the time of the secondary collision, the protrusions 291 291 291 and 291 with sharp tips can bite into the long groove 23c for tilt position adjustment.

  Next, a third embodiment of the present invention will be described. FIG. 12 is a front view of the main part showing the tilt position adjusting long groove and the rotation preventing part on the back side of the fixed cam according to the third embodiment of the present invention, and is a modified example of the resin guide attached to the rotation preventing part. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The third embodiment is a modification of the second embodiment and is an example in which the shape of the resin guide that covers the rotation stopper 29 is changed. As shown in FIG. 12, the resin guide 52 according to the third embodiment is an example in which resin guides are coated on all four sides of the rotation preventing portion 29. Therefore, when the tilt position of the column 1 is adjusted, it is possible to prevent a hitting sound when the rotation stopper 29 comes into contact with the upper end and the lower end of the tilt position adjusting long groove 23c at the tilt rising end and the tilt falling end, which is preferable. .

  Next, a fourth embodiment of the present invention will be described. FIG. 13 is a front view of the main part showing the tilt position adjusting long groove and the detent portion on the back side of the fixed cam according to the fourth embodiment of the present invention, and is a modified example of the resin guide attached to the detent portion. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The fourth embodiment is a modification of the second embodiment, and is an example in which the shape of the resin guide that covers the rotation stopper 29 is changed. As illustrated in FIG. 13, the resin guide 53 of the fourth embodiment is an example in which a resin guide that completely covers all four sides of the anti-rotation portion 29 and the protrusion 291 having a sharp tip is covered.

  Accordingly, since the protrusion 291 having a sharp tip does not contact the tilt position adjusting long groove 23c at the time of normal tilt position adjustment, a contact noise is rarely generated, or the tilt position adjusting long groove 23c or the protrusion 291 having a sharp tip is provided. There is no risk of wear. Further, it is possible to prevent a hitting sound when the rotation preventing portion 29 comes into contact with the upper end and the lower end of the tilt position adjusting long groove 23c at the tilt rising end and the tilt falling end. At the time of the secondary collision, the resin guide 53 is broken, and the protrusions 291 291 291 291 with sharpened tips can bite into the long groove 23c for tilt position adjustment.

  Next, a fifth embodiment of the present invention will be described. FIG. 14 is a front view of the main part showing the tilt position adjusting long groove and the rotation preventing part on the back side of the fixed cam according to the fifth embodiment of the present invention, which is a modified example of the rotation preventing part. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The fifth embodiment is a modification of the first embodiment, and is an example in which the number of the protrusions 291 having the sharp tips of the rotation preventing portions 29 is increased. In other words, in the first embodiment, the protrusions 291 having a sharp tip are provided at four positions on both the vehicle body front side and the vehicle body rear side of the rotation preventing portion 29 and on the tilt upper side and the tilt lower side of the rotation preventing portion 29. Is formed. On the other hand, as shown in FIG. 14, protrusions 292 and 292 having pointed tips are provided at both the front side and the rear side of the vehicle body 29 and the intermediate position between the tilt upper side and the tilt lower side. A total of two locations have been added.

  Therefore, even if the impact force at the time of the secondary collision is large and the amount by which the side plate 23b of the upper vehicle body mounting bracket 23 is crushed forward is increased, the number of protrusions 291 and 292 having pointed tips increases. Therefore, the protrusions 291 and 292 with sharp tips deeply penetrate into the tilt position adjusting long groove 23c, and effectively act as a large resistance against the force in the upward tilt direction generated at the time of the secondary collision.

  Next, a sixth embodiment of the present invention will be described. FIG. 15 is a front view of the main part showing the tilt position adjusting long groove and the rotation preventing part on the back side of the fixed cam according to the sixth embodiment of the present invention, which is a modification of the rotation preventing part. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The sixth embodiment is a modification of the first embodiment, and is an example in which the number of protrusions 291 in which the tip of the anti-rotation portion 29 is sharp is reduced. In other words, in the first embodiment, the protrusions 291 having a sharp tip are provided at four positions on both the vehicle body front side and the vehicle body rear side of the rotation preventing portion 29 and on the tilt upper side and the tilt lower side of the rotation preventing portion 29. Is formed. On the other hand, as shown in FIG. 15, protrusions 292 and 292 each having a sharp tip at both the front side and the rear side of the vehicle body 29 and only at the intermediate position between the tilt upper side and the tilt lower side. Are formed in two places in total.

  Therefore, even if the impact force at the time of the secondary collision is small and the amount by which the side plate 23b of the upper vehicle body mounting bracket 23 is crushed to the front side of the vehicle body is small, the number of protrusions 292 having sharp points is small. The sharp protrusion 292 deeply bites into the tilt position adjusting long groove 23c, and effectively acts as a large resistance against the upward force of the tilt generated at the time of the secondary collision. Although not shown, the number of protrusions with sharp tips may be different between the front side of the vehicle body and the rear side of the vehicle body.

  Next, a seventh embodiment of the present invention will be described. FIG. 16: is a front view which shows the rotation prevention part single-piece | unit of the back side of the fixed cam of Example 7 of this invention, and is a modification of a rotation prevention part. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The seventh embodiment is a modification of the first embodiment, and the sliding clearance between the rotation preventing portion 29 and the tilt position adjusting long groove 23c is reduced to improve the sliding performance when adjusting the tilt position. It is an example. That is, in the first embodiment, as indicated by a two-dot chain line in FIG. 16, the protrusion 291 having a sharp tip on the tilt upper side of the rotation stopper 29 and the projection 291 having a sharp tip on the tilt lower side are connected. The sliding surfaces 293 and 293 are formed at positions retracted by a distance δ3 from the tip of the projection 291 having a sharp tip.

  In the seventh embodiment, as shown by a solid line in FIG. 16, a sliding surface 294 that connects between a protrusion 291 having a sharp tip on the upper side of the tilting portion 29 and a protrusion 291 having a sharp tip on the lower side of the tilt. 294, the distance δ4 from the tip of the projection 291 having a sharp tip is made smaller than the distance δ3 of the first embodiment.

  Accordingly, the sliding gap between the tilt position adjusting long groove 23c is filled with grease or high-viscosity oil, so that the sliding performance at the time of tilt position adjustment and the protrusion 291 having a sharp tip are adjusted to adjust the tilt position. The anti-rotation portion 29 has both of easy biting into the long slot 23c.

  Next, an eighth embodiment of the present invention will be described. FIG. 17 is a front view showing a single rotation prevention unit on the back side of the fixed cam according to the eighth embodiment of the present invention, which is a modification of the rotation prevention unit. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The eighth embodiment is a modification of the seventh embodiment, and the sliding clearance between the rotation preventing portion 29 and the tilt position adjusting long groove 23c is reduced to improve the sliding performance when adjusting the tilt position. It is an example. That is, in the eighth embodiment, as shown by a solid line in FIG. 17, a sliding connection between the protrusion 291 having a sharp tip on the tilt upper side of the rotation stopper 29 and the protrusion 291 having a sharp tip on the lower tilt side. The surfaces 295 and 295 have a circular arc shape that is convex toward the tilt position adjusting long groove 23c. Accordingly, the distance δ5 from the tip of the projection 291 having a sharp tip can be made as close to zero as possible.

  That is, the sliding surfaces 295 and 295, the tilt position adjusting long groove 23c, and the contact portion become the apex of the arc, and the distance from the apex of the arc to the projections 291 and 291 with sharp tips (the vertical distance in FIG. 17). ) Can be sufficiently ensured, and the impact load is sufficiently applied to the protrusion 291 having a sharp tip at the time of the secondary collision. Therefore, the protrusion 291 having a sharp tip serves as a detent 29 having both the ease of biting into the tilt position adjusting long groove 23c and the sliding performance during tilt position adjustment.

  Next, a ninth embodiment of the present invention will be described. FIG. 18 is a front view showing a single rotation prevention unit on the back side of the fixed cam according to the ninth embodiment of the present invention, which is a modification of the rotation prevention unit. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The ninth embodiment is a modification of the first embodiment, and is an example in which the rotation preventing portion 29 and the protrusion 291 having a sharp tip are formed by separate parts. That is, in the ninth embodiment, as shown by hatching in FIG. 18, a protruding member 296 having four pointed protrusions 291 (having a rectangular hole 297 at the center) is formed as a separate part from the rotation stopper 29. And it is press-fitted into the rectangular outer periphery of the rotation stopper 29. Accordingly, the hardness of the rotation preventing portion 29 can be reduced, and the hardness of the protruding member 296 that can be easily formed in a simple shape can be increased.

  Next, a tenth embodiment of the present invention will be described. FIG. 19 is a front view showing a single rotation prevention unit on the back side of the fixed cam according to the tenth embodiment of the present invention, which is a modification of the rotation prevention unit. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The tenth embodiment is a modification of the ninth embodiment, and is an example in which the anti-rotation portion 29 and the protrusion 291 having a sharp tip are formed as separate parts. That is, in Example 10, as shown by hatching in FIG. 19, a protrusion member 298 having four pointed protrusions 291 (having a rectangular hole 297 in the central portion) 298 is formed as a separate part from the rotation preventing portion 29. And it is press-fitted into the rectangular outer periphery of the rotation stopper 29. Further, both the upper tilt side and the lower tilt side of the protruding member 298 are expanded in an arc shape. Therefore, when the tilt position of the column 1 is adjusted, it is possible to improve the strength when the protruding member 298 contacts the upper end and the lower end of the tilt position adjusting long groove 23c at the tilt ascending end and the tilt descending end. Further, the groove width of the tilt position adjusting long groove 23c becomes narrow due to the impact force at the time of the secondary collision, and when the protrusion 291 of the protrusion member 298 bites into the tilt position adjusting long groove 23c, the sandwiching direction (the horizontal direction in FIG. 19) ) Strength increases.

  Next, Example 11 of the present invention will be described. FIG. 20 is a front view of the principal part showing the tilt position adjusting long groove and the rotation preventing part on the back side of the fixed cam according to the eleventh embodiment of the present invention, which is a modified example of the rotation preventing part. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The eleventh embodiment is a modification of the sixth embodiment, in which the rotation preventing portion 29 of the fixed cam 27b is covered with a resin guide that reduces the coefficient of friction with the tilt position adjusting long groove 23c.

  That is, since the rotation preventing portion 29 of the sixth embodiment has protrusions 292 and 292 having a sharp tip at only a middle position between the tilt upper side and the tilt lower side, a total of two places are formed in the tilt position adjusting long groove 23c. On the other hand, since the anti-rotation part 29 tends to fall down, a resin guide is particularly necessary.

  As shown in FIG. 20, the eleventh embodiment completely covers the protrusion 292 having a sharp tip on both the front side and the rear side of the vehicle body of the anti-rotation part 29, and the resin thin plate is formed in a U shape. The bent resin guide 54 is covered. The material and shape of the resin guide 54, the fixing method to the anti-rotation portion 29, and the action of the resin guide 54 are the same as in the second embodiment.

  Next, a twelfth embodiment of the present invention will be described. FIG. 21 is a front view of the main part showing the tilt position adjusting long groove and the detent portion on the back side of the fixed cam according to the twelfth embodiment of the present invention, and is a modified example of the detent portion. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The twelfth embodiment is a modification of the eleventh embodiment, and is an example in which the shape of the resin guide covering the rotation preventing portion 29 is changed. As illustrated in FIG. 21, the resin guide 55 according to the twelfth embodiment is an example in which resin guides are covered on all four sides of the rotation preventing portion 29. Therefore, when the tilt position of the column 1 is adjusted, it is possible to prevent a hitting sound when the rotation stopper 29 comes into contact with the upper end and the lower end of the tilt position adjusting long groove 23c at the tilt rising end and the tilt falling end, which is preferable. .

  Next, a thirteenth embodiment of the present invention will be described. FIG. 22 is a front view of the main part showing the tilt position adjusting long groove and the detent portion on the back side of the fixed cam according to the thirteenth embodiment of the present invention, and is a modification of the detent portion. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  The thirteenth embodiment is a modification of the eleventh embodiment and is an example in which the shape of the resin guide that covers the rotation preventing portion 29 is changed. As illustrated in FIG. 22, the resin guide 56 according to the thirteenth embodiment is an example in which a resin guide that completely covers all four sides of the anti-rotation portion 29 and the protrusion 292 having a sharp tip is covered.

  Accordingly, the projection 292 having a sharp tip does not come into contact with the tilt position adjusting long groove 23c at the time of normal tilt position adjustment. There is no risk of wear.

  Further, it is possible to prevent a hitting sound when the rotation preventing portion 29 comes into contact with the upper end and the lower end of the tilt position adjusting long groove 23c at the tilt rising end and the tilt falling end. At the time of the secondary collision, the resin guide 56 is broken, and the protrusions 292 and 292 having sharp points can bite into the tilt position adjusting long groove 23c.

  In the above-described embodiment, the outer column 11 disposed on the rear side of the vehicle body slidably fits the inner column disposed on the front side of the vehicle body to constitute the column 1. A column may be arranged, an inner column may be arranged on the rear side of the vehicle body, and the outer column may be supported on the vehicle body so that the tilt position can be adjusted.

1 is an overall perspective view showing a state in which a steering device according to an embodiment of the present invention is attached to a vehicle. It is a front view of the principal part which shows the steering device of Example 1 of this invention. It is a perspective view of the principal part which shows the tilt and the telescopic clamp apparatus, the tilt lock mechanism, and the telescopic lock mechanism of Example 1 of this invention, (2) is a perspective view which shows the state which removed the operation lever and the clamping rod from (1). FIG. 3 shows a state in which the eccentric cam and the rotation transmission shaft of the tilt lock mechanism and the telescopic lock mechanism are extracted from FIG. 3, (1) is a perspective view, and (2) is a perspective view showing a state in which the rotation transmission shaft is removed from (1). (3) is a longitudinal sectional view of (1). FIG. 4 is a perspective view of a main part showing only the tilt / telescopic clamp device with the tilt lock mechanism and the telescopic lock mechanism removed from FIG. 3, and (2) is a perspective view showing a state in which the operation lever and the tightening rod are removed from (1). It is. (1), (2) is a perspective view which shows the fixed cam single-piece | unit of Example 1 of this invention, (2) is a perspective view which shows the rotation prevention part of the back side of (1). (3) is a perspective view showing an internal fitting state of the tilt position adjusting long groove and the rotation preventing portion on the back side of the fixed cam. It is a front view of the principal part which shows the internal fitting state of the long groove for tilt position adjustment of Example 1 of this invention, and the rotation prevention part of the back side of a fixed cam. It is AA sectional drawing of FIG. It is a front view of the principal part which shows the long groove | channel for tilt position adjustment when a tilt and telescopic clamp apparatus is unclamped, the rotation prevention part of the back side of a fixed cam, and the eccentric cam of a tilt lock mechanism. It is a front view of the principal part which shows the long slot for tilt position adjustment at the time of a secondary collision, the rotation prevention part of the back side of a fixed cam, and the eccentric cam of a tilt lock mechanism. (1) is the front view of the principal part which shows the long slot for tilt position adjustment of Example 2 of this invention, the rotation prevention part of the back side of a fixed cam, and the eccentric cam of a tilt lock mechanism, (2) is (1) It is a perspective view of the resin guide single-piece | unit with which the rotation prevention part of the fixed cam was mounted | worn. It is a front view of the principal part which shows the long groove for tilt position adjustment of Example 3 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of the resin guide with which the rotation prevention part was mounted | worn. It is a front view of the principal part which shows the long groove for tilt position adjustment of Example 4 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of the resin guide with which the rotation prevention part was mounted | worn. It is a front view of the principal part which shows the long groove for tilt position adjustment of Example 5 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of a rotation prevention part. It is a front view of the principal part which shows the long groove for tilt position adjustment of Example 6 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of a rotation prevention part. It is a front view which shows the rotation prevention part single-piece | unit of the back side of the fixed cam of Example 7 of this invention, and is a modification of a rotation prevention part. It is a front view which shows the rotation prevention part single-piece | unit of the back side of the fixed cam of Example 8 of this invention, and is a modification of a rotation prevention part. It is a front view which shows the rotation prevention part single-piece | unit of the back side of the fixed cam of Example 9 of this invention, and is a modification of a rotation prevention part. It is a front view which shows the rotation prevention part single-piece | unit of the back side of the fixed cam of Example 10 of this invention, and is a modification of a rotation prevention part. It is a front view of the principal part which shows the long slot for tilt position adjustment of Example 11 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of a rotation prevention part. It is a front view of the principal part which shows the long groove for tilt position adjustment of Example 12 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of a rotation prevention part. It is a front view of the principal part which shows the long groove for tilt position adjustment of Example 13 of this invention, and the rotation prevention part of the back side of a fixed cam, and is a modification of a rotation prevention part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Column 2 Steering wheel 3 Steering shaft 4 Universal joint 5 Intermediate shaft 5a Intermediate inner shaft 5b Intermediate outer shaft 6 Universal joint 7 Steering gear 8 Tie rod 9 Steering wheel 10 Steering device 11 Outer column 12 Inner column 121 Outer surface 13 Vehicle body 23 Upper vehicle body Mounting bracket 23a Upper plate 23b Side plate 231b End surface 23c on the rear side of the vehicle body 24 Long groove for tilt position adjustment 24 Lower vehicle body mounting bracket 24a Pivoting pin 25 Column clamp member 251 Inner circumferential surface 25a Side plate 25b Through hole 25c Slit 27 Clamp device (Tilt / Telescopic) Clamp device)
27a Tightening rod 271a Male screw 27b Fixed cam 27c Movable cam 27d Thrust bearing 27e Operation lever 271e Small hole 272e Solid line arrow 273e Broken line arrow 27f Adjustment nut 271f Female thread 28 Head 281 Non-rotating part 29 Anti-rotating part 291 Tip of tip 29 293, 294, 295 Sliding surface 296 Protruding member 297 Rectangular hole 298 Protruding member 30 Tilt lock mechanism 31 Main drive eccentric cam 311 Through hole 312 Partial plane portion 313 Cam surface 314 Concavity and convexity 315 Escape groove 316 Stopper 317 Small Hole 318 Small hole 32 Rotation transmission shaft 321 Plane notch 322 Plane notch 33 Driven eccentric cam 331 Through hole 332 Partial plane 333 Cam surface 334 Concavity and convexity 335 Escape groove 336 Stopper 338 Small hole 3 4 Torsion coil spring 351 Solid arrow 352 Solid arrow 353 Solid arrow 354 Solid arrow 355 Tilt upward component force 356 Axial component force 357 Combined force 36 Bar spring 40 Telescopic lock mechanism 41 Eccentric cam 411 Through hole 413 Cam surface 414 Unevenness Part 415 Escape groove 416 Stopper 418 Small hole 51 Resin guide 511 Round hole 512 Locking convex part 52, 53, 54, 55, 56 Resin guide

Claims (7)

Body mounting bracket that can be mounted on the body,
A column that is supported by the vehicle body mounting bracket so that the tilt position can be adjusted, and a steering shaft on which a steering wheel is mounted is pivotally supported.
In order to clamp and clamp the column to the vehicle body mounting bracket at a desired tilt position, a tilt position adjusting long groove formed in the vehicle body mounting bracket and a tightening rod inserted through the column,
A fixed cam that is supported on one end of the tightening rod and presses one side of the vehicle body mounting bracket against the column;
A movable cam that is supported at one end of the clamping rod so as to be able to rotate together with the operation lever so as to face the fixed cam;
Cam surfaces provided on opposing surfaces of the fixed cam and the movable cam, respectively, for pressing the movable cam in the axial direction relative to the fixed cam;
Formed on the fixed cam to make the fixed cam non-rotatable with respect to the movable cam, fitted in the tilt position adjusting long groove, and along the tilt position adjusting long groove when adjusting the tilt position of the column. Slidable detents,
In order to prevent the column from being flipped up to the upper side of the tilt, it is formed in the detent part, and can bite into the long groove for tilt position adjustment by an impact force to the front side of the vehicle body at the time of a secondary collision, and the tip is A steering device comprising a sharp protrusion. The steering apparatus according to claim 1, wherein
The protrusion with a sharp tip is
A steering apparatus, characterized in that it is formed both on the vehicle body front side and the vehicle body rear side of the anti-rotation part, and on both the upper and lower tilt sides of the anti-rotation part. The steering apparatus according to claim 1, wherein
The protrusion with a sharp tip is
It is formed on both the vehicle body front side and the vehicle body rear side of the anti-rotation part, and at the tilt upper side, the tilt lower side, and the intermediate position between the tilt upper side and the tilt lower side of the anti-rotation part. Steering device characterized. The steering apparatus according to claim 1, wherein
The protrusion with a sharp tip is
A steering apparatus characterized in that the anti-rotation portion is formed on both the vehicle body front side and the vehicle body rear side and at an intermediate position between the tilt upper side and the tilt lower side of the rotation stop portion. In the steering device according to any one of claims 1 to 4,
In the detent part,
A steering apparatus characterized in that a resin guide for reducing friction with the long groove for tilt position adjustment is coated. In the steering device according to any one of claims 1 to 4,
On the outer periphery of the anti-rotation part,
A steering device, characterized in that a projection member that is molded as a separate part from the rotation stopper and has a projection with a sharp tip is fitted externally. In the steering device according to any one of claims 1 to 4,
When the operation lever performs a clamping operation, it comes into contact with the end surface of the vehicle body mounting bracket on the rear side of the vehicle body, and when an external force in the tilt direction acts on the column, it bites into the end surface on the rear side of the vehicle body and moves in the tilt direction of the column. A steering apparatus comprising a tilt lock mechanism for restricting movement.

Images