JP5561253B2 - Steering device - Google Patents

Description

  The present invention relates to a steering device, and in particular, an outer column and an inner column are fitted so as to be slidable relative to each other in the axial direction, thereby adjusting a telescopic position of the steering wheel. The present invention relates to a steering device that collapses to the side and absorbs an impact load.

  There is a steering device that adjusts a telescopic position or absorbs an impact load at the time of a secondary collision by fitting an outer column and an inner column so as to be relatively slidable in the axial direction.

  In such a steering device, an axial slit is formed in the outer column, the tightening rod is tightened, and the clamp portion of the outer column is elastically deformed at the slit portion, and the outer column is turned into the inner column during normal driving operation. On the other hand, the structure of clamping so that sliding is impossible is common (patent document 1).

  The steering device of Patent Document 1 in which a slit is formed in the outer column has an advantage that the outer column can be easily elastically deformed at the slit portion and the inner column can be clamped reliably.

  However, since the distance between the closed end of the slit and the axis of the clamping rod changes depending on the telescopic position, the operating force of the operating lever required to elastically deform the outer column by a predetermined dimension changes. . Therefore, since the operating force for clamping the outer column to the inner column differs depending on the telescopic position, it is difficult to clamp the outer column to the inner column with a stable clamping force.

  In the steering device of Patent Document 2, the rib formed on the outer peripheral surface of the outer column is formed so that the cross-sectional area in the direction perpendicular to the axis increases from the closed end side of the slit toward the open end side. . Therefore, the rigidity of the outer column is formed so that the open end portion side of the slit is larger than the closed end portion side of the slit.

  As a result, even if the distance between the closed end of the slit and the axis of the clamping rod changes depending on the telescopic position, if the operating lever is operated with a constant operating force, the clamp part of the outer column is only a predetermined dimension. Due to elastic deformation, the outer peripheral surface of the inner column can be clamped with a substantially constant clamping force. However, since the steering device of Patent Document 2 is a method in which a portion of the rib is removed to change the rigidity of the outer column, the rib function of increasing the rigidity of the outer column may be partially impaired. . Further, the method of removing a part of the ribs by cutting is intermittent cutting by an end mill, so that the cutting resistance varies greatly and the end mill life tends to be reduced.

Japanese Patent Laid-Open No. 2003-2211 JP 2008-254510 A

  It is an object of the present invention to provide a steering device that is easy to process and that stabilizes the clamping force when the outer column is clamped with respect to the inner column while utilizing the function of the outer peripheral rib. .

The above problem is solved by the following means. That is, the first invention is an inner column, a hollow cylindrical outer column having an inner peripheral surface that is fitted on the outer peripheral surface of the inner column so as to be relatively slidable in the axial direction of the inner column, The outer column is provided on the outer column, and is formed so as to penetrate from the outer peripheral surface to the inner peripheral surface from the axial front end of the outer column in the axial direction to the central portion on the rear side of the vehicle. A slit having an open end and a closed end on the rear side of the vehicle body , provided integrally with the outer column and projecting to the lower side of the vehicle body, arranged on the left and right of the slit, and approaching each other through the slit The inner column is formed to be separable and elastically deformed to expand and contract the inner peripheral surface of the outer column, and the outer peripheral surface of the inner column is clamped / unclamped from both sides in the vehicle body width direction. A pair of clamping members provided on the outer circumferential direction of the outer column, at the location of the closed end of the slit serving as a fulcrum the width of the slit is narrowed by the elastic deformation of the pair of clamping members, of the outer column with respect to the axis and the slits at positions symmetrical in the width direction of the vehicle body, from a position slightly vehicle rear end than the closed end extending to the front side of the vehicle body, of the total length of the long groove for telescopic adjustment formed in said clamping member A through hole formed up to about one third of the position , protrudes radially outward from the rear end of the inner column and inserts the outer peripheral surface of the inner column into the inner peripheral surface of the outer column. The inner column is formed to be bent in a U shape from the end toward the front end of the vehicle body, engages with the through hole, and the inner column comes out of the outer column. A steering device characterized by comprising an engaging protrusion formed of a rectangular thin plate for preventing and.

The second invention is a steering apparatus of the first of the invention, the through hole is a steering device characterized in that it is formed on the vehicle body upper side of the outer column.

Third invention is a steering device according to the first or the second, the through hole is a steering device characterized by being formed on a long elongated hole in the axial direction of the outer column is there.

Fourth invention is a steering device according to the first or the second, the through hole, steering, characterized in that it is formed in a long elongated hole in the circumferential direction of the outer column Device.

Shape fifth invention is a steering device according to the first or the second, the through hole is connected a length hole and circumferentially long elongated hole in the axial direction of the outer column A steering apparatus characterized by having

Sixth invention is a steering device according to any one of the first to fifth, the through hole is formed in a rib that protrudes radially outward on an outer peripheral surface of the outer column This is a steering device.

Seventh invention is a steering device according to any one of the first to fifth, the through hole, a pair of through holes arranged symmetrically about the axis of the outer column A steering apparatus characterized by being configured.

  In the steering device according to the present invention, the hollow columnar outer column having an inner peripheral surface that is fitted to the outer peripheral surface of the inner column so as to be relatively slidable in the axial direction is disposed in the vicinity of the central portion in the axial direction of the slit. A through-hole penetrating from the outer peripheral surface of the outer column to the inner peripheral surface is provided.

  Further, in the steering device of the present invention, the through-holes are long holes in the axial direction of the outer column on the left and right sides of the outer column in the vehicle width direction or on the vehicle body side of the outer column, and in the circumferential direction of the outer column. A long long hole, a long long hole in the axial direction of the outer column and a long long hole in the circumferential direction are connected.

  With this configuration, the shape of the through hole is arbitrarily processed, and the secondary moment of inertia of the outer column is set to a desired value according to the axial position of the outer column regardless of the shape of the outer peripheral rib of the outer column. Can do. As a result, the rigidity of the outer column is larger at the slit end in the axial direction than at the slit center, so the lever can be operated with a constant operating force even if the telescopic position changes. Then, the clamp member is elastically deformed by a predetermined dimension, and the inner column can be clamped with a substantially constant and stable clamping force, so that the vibration characteristics of the entire steering apparatus are improved.

It is a whole perspective view which shows the state which attached the steering device of this invention to the vehicle. It is a side view which shows the principal part of the steering apparatus of Example 1 of this invention. It is AA sectional drawing of FIG. FIG. 3 is an enlarged side view showing a state where the outer column and the inner column of FIG. 2 are fitted, and is an enlarged side view showing a state where an upper bracket and an operation lever are removed. FIG. 5 is a bottom view of FIG. 4. It is BB sectional drawing of FIG. FIG. 3 is a component diagram illustrating the inner column alone of FIG. 2, (a) is a cross-sectional view taken along the line CC of (b), and (b) is a right side view of (a). It is the arrow P figure of FIG.7 (b). It is a perspective view which shows the outer column single-piece | unit of FIG. 2, and is a perspective view which shows the outer column single-piece | unit of the state before forming a through-hole in an outer column. It is an enlarged side view which shows the outer column single-piece | unit of FIG. It is an enlarged side view which shows the outer column single-piece | unit which has the 1st modification of the through-hole of Fig.10 (a). It is an enlarged side view which shows the outer column single-piece | unit which has the 2nd modification of the through-hole of Fig.10 (a). It is an enlarged side view which shows the outer column single-piece | unit which has a through-hole of Example 2 of this invention. It is an enlarged side view which shows the outer column single-piece | unit which has the 1st modification of the through-hole of Fig.11 (a). It is an enlarged side view which shows the outer column single-piece | unit which has the 2nd modification of the through-hole of Fig.11 (a). It is an enlarged plan view which shows the outer column single-piece | unit which has a through-hole of Example 3 of this invention. It is an enlarged plan view which shows the outer column single-piece | unit which has the 1st modification of the through-hole of Fig.12 (a). It is an enlarged plan view which shows the outer column single-piece | unit which has the 2nd modification of the through-hole of Fig.12 (a).

    Embodiments 1 to 3 of the present invention will be described below with reference to the drawings.

  FIG. 1 is an overall perspective view showing a state in which a steering device 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 12 is pivotally supported on the column 1 so as to be rotatable. A steering wheel 121 is attached to the steering shaft 12 at the right end (rear side of the vehicle body), and an intermediate shaft 22 is connected to the left end (front side of the vehicle body) of the steering shaft 12 via a universal joint 21.

  The intermediate shaft 22 includes a solid intermediate inner shaft 221 in which a male spline is formed and a hollow cylindrical intermediate outer shaft 222 in which a female spline is formed. The male spline of the intermediate inner shaft 221 is an intermediate outer shaft. The female spline 222 is fitted so as to be extendable (slidable) and transmit rotational torque.

  Further, the vehicle body rear side of the intermediate outer shaft 222 is connected to the universal joint 21, and the vehicle body front side of the intermediate inner shaft 221 is connected to the universal joint 23. A pinion that meshes with a rack (not shown) of the steering gear 24 is connected to the universal joint 23.

  When the driver rotates the steering wheel 121, the rotational force is transmitted to the steering gear 24 through the steering shaft 12, the universal joint 21, the intermediate shaft 22, and the universal joint 23, and the tie rod is transmitted through the rack and pinion mechanism. 25, the steering angle of the wheel can be changed.

  FIG. 2 is a side view showing a main part of the steering device according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 4 is an enlarged side view showing a fitting state of the outer column and the inner column of FIG. 2, and is an enlarged side view showing a state in which the upper bracket and the operation lever are removed. 5 is a bottom view of FIG. 4, and FIG. 6 is a cross-sectional view taken along the line BB of FIG. FIGS. 7A and 7B are component diagrams showing the single inner column of FIG. 2, in which FIG. 7A is a cross-sectional view taken along the line CC of FIG. 2B, and FIG. FIG. 8 is a P arrow view of FIG. FIG. 9 is a perspective view showing the single outer column of FIG. 2, and is a perspective view showing the single outer column in a state before a through hole is formed in the outer column. FIG. 10A is an enlarged side view showing the single outer column of FIG.

  As shown in FIGS. 2 to 10A, the column 1 includes a hollow cylindrical outer column (upper column) 11 and an inner side slidable in the axial direction on the left side (front side of the vehicle body) of the outer column 11. The inner column (lower column) 10 is fitted.

  An upper steering shaft 12A is rotatably supported on the outer column 11, and the above-described steering wheel 121 (see FIG. 1) is fixed to the right end (rear side of the vehicle body) of the upper steering shaft 12A.

  An upper bracket (vehicle mounting bracket) 3 is attached to the left side (front side of the vehicle body) of the outer column 11 so as to sandwich the outer column 11 from both the left and right sides. The upper bracket 3 is detachably attached to the front side of the vehicle body via a capsule 42 made of aluminum alloy or the like fixed to the vehicle body 41.

  When the driver collides with the steering wheel 121 during a secondary collision and a large impact force is applied to the outer column 11, the upper bracket 3 is detached from the capsule 42 to the front side of the vehicle body and guided to the front side of the vehicle body by the inner column 10. It moves to collapse and absorbs impact energy at the time of collision.

  An electric power steering device 6 is attached to the front end of the inner column 10 on the vehicle body, and a flange 61 of the electric power steering device 6 is pivotally supported on the vehicle body 41 via a tilt center shaft 62. The electric power steering device 6 detects the steering torque of the upper steering shaft 12A, and applies an auxiliary steering force proportional to the steering torque to the output shaft 63. The output shaft 63 transmits rotational torque to the steering gear 24 via the universal joint 21 shown in FIG.

  The upper bracket 3 has an upper plate 32 and side plates 33 and 34 extending downward from the upper plate 32. A pair of clamp members 13 </ b> A and 13 </ b> B are integrally formed on the outer column 11 so as to protrude below the outer column 11. The outer surfaces 14A, 14B of the clamp members 13A, 13B are slidably in contact with the inner surfaces 331, 341 of the side plates 33, 34 of the upper bracket 3.

  In the embodiment of the present invention, the outer column 11 is an integrally molded product made of aluminum die casting. However, the outer column 11 may be formed by welding clamp members 13A and 13B to a steel pipe. Further, for the purpose of weight reduction, it may be made of magnesium die casting. The inner column 10 is formed by press forming a steel pipe.

  Tilt adjusting long grooves 35 and 36 are formed in the side plates 33 and 34 of the upper bracket 3. The clamp members 13A and 13B are formed with telescopic adjustment long grooves 15A and 15B extending in a direction perpendicular to the paper surface of FIG. 3 and extending in the direction of the axis 16 of the outer column 11 as shown in FIG. .

  A round rod-shaped fastening rod 5 is inserted from the right side of FIG. 3 through the long grooves 35 and 36 for tilt adjustment and the long grooves 15A and 15B for telescopic adjustment. A cylindrical head 51 is formed at the right end of the clamping rod 5. An anti-rotation portion (not shown) is formed on the outer diameter portion of the head 51, and this anti-rotation portion is formed in a rectangular cross section that is slightly narrower than the groove width of the tilt adjusting long groove 36.

  The anti-rotation portion is fitted into the tilt adjusting long groove 36 to prevent the tightening rod 5 from rotating with respect to the upper bracket 3, and when the tilt position of the outer column 11 is adjusted, the tightening rod 5 is aligned along the tilt adjusting long groove 36. Slide.

  A fixed cam 53, a movable cam 54, an operation lever 55, a thrust bearing 56, and a nut 57 are externally fitted in this order on the outer periphery of the left end of the tightening rod 5, and a female screw formed on an inner diameter portion of the nut 57 is a tightening rod. 5 is screwed into a male screw 58 formed at the left end of the pin 5.

  A rotation preventing portion (not shown) having a rectangular cross section is formed on the outer periphery of the right end of the fixed cam 53. This detent portion fits into the tilt adjusting long groove 35 to prevent the fixed cam 53 from rotating with respect to the upper bracket 3 and, at the time of adjusting the tilt position of the outer column 11, along the tilt adjusting long groove 35, the fixed cam 53 53 is slid.

  Complementary inclined cam surfaces are formed on opposite end surfaces of the fixed cam 53 and the movable cam 54 and mesh with each other. When the operation lever 55 connected to the left side surface of the movable cam 54 is operated by hand, the movable cam 54 rotates with respect to the fixed cam 53.

  As shown in FIGS. 2 to 6, a slit 7 penetrating from the outer peripheral surface 11 </ b> A of the outer column 11 to the inner peripheral surface 11 </ b> B is formed on the vehicle body lower side of the outer column 11. The slit 7 is opened to the clamp member vehicle body front side end surfaces 132A and 132B of the clamp members 13A and 13B integral with the outer column 11, and the open end portion (outer column 11) from the open side of the clamp member vehicle body front side end surfaces 132A and 132B. Are formed in this order: 71 in the axial direction) 71, parallel portion 72, and closed end portion (center portion in the axial direction of the outer column 11) 73. On the vehicle body front side of the outer column 11, a cut groove 74 is formed by cutting in a direction perpendicular to the slit 7 from the vehicle body lower side of the outer column 11 to the axis 16 of the outer column 11. The slit 7 may be formed by eliminating the cut groove 74 and opening the outer column body front side end surface 111 of the outer column 11.

  A parallel portion 72 with a certain width extends from the open end 71 to the rear side of the vehicle body (the right side in FIG. 5), passes the clamp member rear end surfaces 131A and 131B of the clamp members 13A and 13B, and extends in the axial direction of the outer column 11 An arcuate closed end 73 is formed at a substantially intermediate position in the length.

  As described above, the distance between the closed end 73 of the slit 7 and the axis of the clamping rod 5 changes depending on the telescopic position. Therefore, the clamp members 13A and 13B of the outer column 11 are made to have predetermined dimensions on the basis of the lever principle. Only the force required for elastic deformation changes.

  Therefore, the operating force of the operating lever 55 required to obtain a predetermined clamping force differs depending on the telescopic position. That is, the closer the axial center of the tightening rod 5 is to the open end 71 side of the slit 7, the greater the clamping force will be generated even if the operating lever 55 is operated with a constant operating force.

  In the first embodiment of the present invention, as shown in FIGS. 4, 6, 9, and 10 (a), shafts of the outer column 11 are provided on the left and right side surfaces in the vehicle width direction of the outer peripheral surface 11 </ b> A of the outer column 11. Ribs 81 </ b> A and 81 </ b> A are formed at the center 16 in parallel with the axis 16 of the outer column 11. The ribs 81A and 81A are formed extending from the vicinity of the clamp member rear end surfaces 131A and 131B of the clamp members 13A and 13B to the rear side of the vehicle body and to the vicinity of the flanges 17A and 17B on the rear side of the vehicle body.

  Also, ribs 81B and 81B are provided on the left and right side surfaces of the outer peripheral surface 11A of the outer column 11 on the upper surface side (the vehicle body upper side) of the outer column 11 and parallel to the axis 16 of the outer column 11. Each is formed. The ribs 81B and 81B extend from the vicinity of the clamp member vehicle body front side end surfaces 132A and 132B of the clamp members 13A and 13B beyond the clamp member vehicle body rear side end surfaces 131A and 131B and to the vicinity of the flanges 17A and 17B on the vehicle body rear side. ing.

  A rib 81 </ b> C is formed on the upper side of the outer peripheral surface 11 </ b> A of the outer column 11 in parallel with the axis 16 of the outer column 11. The rib 81C extends from the vicinity of the clamp member vehicle body front side end surfaces 132A, 132B of the clamp members 13A, 13B to the vicinity of the flanges 17A, 17B on the vehicle body rear side. .

  As shown in FIGS. 2, 3, 4, 6, 9, and 10, through holes 82 and 82 are formed on the left and right sides in the vehicle width direction of the outer peripheral surface 11 </ b> A of the outer column 11. Yes. The through holes 82 and 82 are cut in the outer column 11 on the lower side of the body of the ribs 81A and 81A (Q position surrounded by an ellipse of a two-dot chain line in FIG. 9) parallel to the axis 16 of the outer column 11. It is formed by processing. By arbitrarily processing the shape of the through holes 82, 82, the cross-sectional secondary moment of the outer column 11 can be set to a desired value depending on the axial position of the outer column 11 regardless of the shape of the ribs 81A, 81B, 81C of the outer column 11. Can be set to a value.

  Cutting of the through-holes 82 and 82 can be continuously performed by an end mill, so that variation in cutting resistance is small, and the life of the end mill is extended, which is economical. Further, in order to set the cross-sectional secondary moment of the outer column 11 to a desired value, a part of the ribs 81A, 81B, 81C of the outer column 11 is not removed, so that the function of the rib is rarely impaired. Rigidity can be ensured.

  The through holes 82 and 82 are formed so as to extend slightly from the position on the rear side of the vehicle body to the front side of the vehicle body from the closed end portion 73 of the slit 7 (the central portion in the axial direction of the outer column 11). It extends beyond the rear end of the vehicle body to a position that is about one third of the total length of the telescopic adjustment long grooves 15A and 15B. That is, the through holes 82 and 82 are formed as long holes that are long in the axial direction of the outer column 11. The through holes 82 are formed so as to penetrate from the outer peripheral surface 11A of the outer column 11 to the inner peripheral surface 11B.

  That is, the outer column 11 has the through holes 82 and 82 in the vicinity of the closed end portion 73 (the central portion in the axial direction of the outer column 11) of the slit 7. It is formed so that the vicinity of the open end portion (end portion in the axial direction of the outer column 11) 71 is larger than the vicinity of 73. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  When the operation lever 55 is rotated in the clamping direction, the mountain of the inclined cam surface of the movable cam 54 rides on the mountain of the inclined cam surface of the fixed cam 53, and at the same time the pulling rod 5 is pulled to the left in FIG. Push to the right in FIG.

  The right side plate 34 is pushed to the left by the left end surface of the head 51 of the clamping rod 5 to deform the side plate 34 inward. Then, the inner surface 341 of the side plate 34 is strongly pressed against the outer surface 14B of the clamp member 13B. At the same time, the left side plate 33 is pushed to the right by the right end surface of the fixed cam 53 to deform the side plate 33 inward. Then, the inner side surface 331 of the side plate 33 is strongly pressed against the outer side surface 14A of the clamp member 13A.

  As a result, the clamp members 13 </ b> A and 13 </ b> B are elastically deformed inward in a direction approaching each other, and the slit 7 has the closed end portion 73 as a fulcrum and the open end portion 71 and the parallel portion 72 are narrowed. Therefore, the inner peripheral surface 11B of the outer column 11 is reduced in diameter, and the outer peripheral surface 10A of the inner column 10 is clamped (see FIG. 6).

  In the first embodiment of the present invention, the rigidity of the outer column 11 is such that the vicinity of the open end of the slit 7 (the end of the outer column 11 in the axial direction) 71 is the closed end (the center of the outer column 11 in the axial direction). Part) 73 is formed larger than the vicinity. Therefore, the distance between the closed end 73 of the slit 7 and the axis of the clamping rod 5 varies depending on the telescopic position. However, if the operating lever 55 is operated with a constant operating force, the clamp members 13A and 13B of the outer column 11 are elastically deformed by a predetermined dimension, and the outer peripheral surface 10A of the inner column 10 is moved with a substantially constant and stable clamping force. It becomes possible to clamp. The through holes 82 and 82 are formed in the outer column 11 by cutting, but may be formed by casting at the same time when the outer column 11 is cast.

  In this way, the outer column 11 is fixed to the upper bracket 3, and displacement of the outer column 11 in the tilt direction and displacement in the telescopic direction are prevented. FIGS. 7A and 7B are component diagrams showing the single inner column of FIG. 2, in which FIG. 7A is a cross-sectional view taken along the line CC of FIG. 2B, and FIG. FIG. 8 is a P arrow view of FIG.

  As shown in FIGS. 7 and 8, a hollow cylindrical inner column 10 formed by press-molding a steel pipe has a pair of engaging projections at a rear end (right end in FIG. 7A) 10C of the vehicle body. 18 and 18 are formed. The engagement protrusions 18 and 18 are rectangular thin plates having a circumferential length W2 (see FIG. 8), and are bent in a U shape from the rear end 10C of the vehicle body toward the front side of the vehicle body (the left side of FIG. 7A). Is formed.

  In the hollow cylindrical inner column 10 formed by press-molding a steel pipe, before the outer peripheral surface 10A of the inner column 10 is inserted into the inner peripheral surface 11B of the outer column 11, the inner column 10 has an axial center. In parallel, the protrusions 18 and 18 (indicated by a two-dot chain line) are linearly formed with a length PL so as to protrude from the rear end 10C of the vehicle body toward the rear side of the vehicle body (the right side in FIG. 7A).

  After the outer peripheral surface 10A of the inner column 10 is inserted into the inner peripheral surface 11B of the outer column 11, the engagement protrusions 18 and 18 are directed toward the front side of the vehicle body (the left side in FIG. 7A) using a press die (not shown). And bend it into a U shape. Then, the engagement protrusions 18 and 18 protrude from the outer peripheral surface 11 </ b> A of the outer column 11 through the through holes 82 and 82 of the outer column 11. As a result, the engagement protrusions 18 and 18 are deformed into engagement protrusions 18 and 18 each composed of a semicircular portion 181 and a linear portion 182.

  The circumferential length W2 (see FIG. 8) of the engaging protrusions 18 and 18 is formed slightly shorter than the circumferential length W1 of the through holes 82 and 82 (see FIG. 4). Further, the length L2 (see FIG. 8) of the engagement protrusions 18, 18 after being bent into a U-shape is longer than the length L1 (see FIG. 4) of the through-holes 82, 82 in the vehicle front-rear direction. It is short.

  The length L1 of the through-holes 82, 82 in the longitudinal direction of the vehicle body is formed to be the same as the adjustment length of the telescopic position of the outer column 11. Further, the inner side surfaces (see FIG. 7A) 183 of the straight portions 182 of the engaging projections 18 and 18 after being bent into a U shape are formed so as to slightly protrude outward in the radial direction from the outer peripheral surface 11A of the outer column 11. Is done.

  When the operation lever 55 is rotated in the unclamping direction, the crest of the inclined cam surface of the fixed cam 53 falls into the trough of the inclined cam surface of the movable cam 54, and the tightening rod 5 and the fixed cam 53 tighten the side plates 33 and 34. Power is released. Accordingly, the side plates 33 and 34 and the clamp members 13A and 13B are elastically returned to the outside in the vehicle width direction.

  In this way, the outer column 11 is unclamped (tilt unclamped) with respect to the upper bracket 3 and the outer column 11 is unclamped (telescopic unclamped) with respect to the inner column 10.

  The outer column 11 is slid in the axial direction with respect to the inner column 10 by grasping the steering wheel 121 and adjusted to a desired telescopic position. At the time of telescopic position adjustment, the engaging protrusions 18 and 18 telescopically move along the through holes 82 and 82. When the steering wheel 121 is pulled to the rear side of the vehicle body (right side in FIG. 4), the semicircular portions 181 of the engagement protrusions 18 and 18 come into contact with the vehicle body front ends (see FIG. 4) 821 of the through holes 82 and 82.

Therefore, it is possible to prevent the outer column 11 from coming out of the inner column 10. If necessary, the tilt positions of the inner column 10 and the outer column 11 can be adjusted around the tilt center axis 62, and then the outer column 11 is clamped to the upper bracket 3 again to adjust the telescopic position. And the tilt position adjustment is finished.
In the first embodiment, the pair of engaging protrusions 18 and 18 are formed on the inner column 10, but the engaging protrusions 18 and 18 may be provided only on one side, and the engaging protrusions 18 and 18 may be omitted. Good.

  Next, a first modification of the through hole 82 of the first embodiment will be described. FIG. 10B is an enlarged side view showing a single outer column having a through hole of a first modified example of the through hole 82 of FIG. The first modification is an example in which a long through hole is formed in the circumferential direction of the outer column 11 at a position Q in FIG. The outer column 11 shown in FIG. 10B is not shown, but the slit 7 having an open end 71, a parallel portion 72, a closed end 73, a cut groove 74 having the same shape as that of the first embodiment, and a rib 81A. , 81B, 81C, and the shape of the through hole is different from FIG.

  Through holes 83, 83 that are long in the circumferential direction of the outer column 11 are formed on the left and right side surfaces in the vehicle width direction of the outer circumferential surface 11A of the outer column 11, respectively. The through holes 83 and 83 are formed on the outer side of the ribs 81 </ b> A and 81 </ b> A (Q position surrounded by the two-dot chain line ellipse in FIG. 9) at the same axial position as the closed end 73 of the slit 7. The column 11 is formed by cutting. The through holes 83 and 83 may be formed by casting at the same time when the outer column 11 is cast. The through holes 83 are formed so as to penetrate from the outer peripheral surface 11A of the outer column 11 to the inner peripheral surface 11B.

  The circumferential length W3 of the through holes 83, 83 is larger than the circumferential length W1 of the through holes 82, 82 of the first embodiment, and the length L3 of the through holes 83, 83 in the longitudinal direction of the vehicle body is The through holes 82 and 82 of the first embodiment are formed to be shorter than the length L1 in the vehicle longitudinal direction.

  That is, since the outer column 11 has the through holes 83 and 83 at the same position as the closed end portion 73 of the slit 7, the second moment of section of the outer column 11 is more open than the vicinity of the closed end portion 73. It is formed so that the vicinity of is larger. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, a second modification of the through hole 82 of the first embodiment will be described. FIG. 10C is an enlarged side view showing a single outer column having a through hole of a second modified example of the through hole 82 of FIG. The second modification is an example in which a through hole having a shape in which a long through hole in the axial direction of the outer column 11 and a long through hole in the circumferential direction are connected is formed at the position Q in FIG. Although not shown, the outer column 11 shown in FIG. 10 (c) has an open end 71, a parallel portion 72, a closed end 73, a slit 7 having a cut groove 74, and ribs having exactly the same shape as the first embodiment. 81A, 81B, 81C, and the shape of the through hole is different from FIG.

  On the left and right side surfaces of the outer peripheral surface 11A of the outer column 11 in the vehicle width direction, through-holes 84, 84 are formed on the vehicle body lower side of the ribs 81A, 81A (Q position surrounded by an ellipse of two-dot chain lines in FIG. 9). Are formed. The through holes 84, 84 have a shape in which a through hole 83 that is long in the circumferential direction and a through hole 82 that is long in the axial direction of the outer column 11 are connected.

  That is, the through holes 83 and 83 are formed as long holes in the circumferential direction of the outer column 11 at the same axial position as the closed end portion 73 of the slit 7. The through holes 82 and 82 are formed in parallel to the axis of the outer column 11 so as to extend from the through holes 83 and 83 to the front side of the vehicle body, and extend beyond the rear end of the long telescopic adjustment grooves 15A and 15B for telescopic adjustment. The long grooves 15A and 15B are formed up to about one third of the total length.

  The through holes 82, 82, 83, 83 are formed in the outer column 11 by cutting. The through holes 82, 82, 83, 83 may be formed by casting at the same time as the outer column 11 is cast. The through holes 82, 82, 83, 83 are formed to penetrate from the outer peripheral surface 11 </ b> A of the outer column 11 to the inner peripheral surface 11 </ b> B.

  The circumferential length W4 of the through holes 84 and 84 is the same as the circumferential length W3 of the through hole 83 in FIG. 10B, and the vehicle body longitudinal length L4 of the through holes 84 and 84 is as follows. The through holes 82 and 82 in FIG. 10A are formed to have the same length L1 in the longitudinal direction of the vehicle body.

  That is, since the outer column 11 has the through holes 84, 84 in the vicinity of the closed end portion 73 of the slit 7, the secondary moment of section of the outer column 11 is greater in the open end portion 71 than in the vicinity of the closed end portion 73. It is formed so that the vicinity is larger. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, the through hole according to the second embodiment of the present invention will be described. FIG. 11A is an enlarged side view showing a single outer column having a through hole according to Embodiment 2 of the present invention. 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. Example 2 is an example in which a through hole is formed at a position R in FIG.

  The outer column 11 shown in FIG. 11A is not shown, but the slit 7 having an open end 71, a parallel portion 72, a closed end 73, a cut groove 74 having the same shape as that of the first embodiment, and a rib. 81A, 81B, 81C, and the positions and shapes of the through holes are different from those shown in FIG.

  Through holes 85 and 85 are formed in the ribs 81B and 81B (the R position surrounded by the two-dot chain line ellipse in FIG. 9) of the outer peripheral surface 11A of the outer column 11, respectively. The through-holes 85, 85 have a length in the longitudinal direction of the vehicle body of L5, and are formed in parallel with the axis of the outer column 11 so as to extend from the position of the closed end 73 of the slit 7 to the front side of the vehicle body. 15A and 15B are formed up to positions near the rear end of the vehicle body. The circumferential length W5 of the through holes 85, 85 is slightly shorter than the circumferential length of the ribs 81B, 81B (the circumferential direction of the outer peripheral surfaces 811B, 811B of the ribs 81B, 81B shown in FIG. 6). Has been.

  The through holes 85 are formed in the outer column 11 by cutting. The through holes 85 and 85 may be formed by casting at the same time when the outer column 11 is cast. The through holes 85 and 85 are formed to penetrate from the outer peripheral surfaces 811B and 811B of the ribs 81B and 81B to the inner peripheral surface 11B of the outer column 11.

  That is, since the outer column 11 has the through holes 85, 85 in the vicinity of the closed end portion 73 of the slit 7, the second moment of section of the outer column 11 is greater in the open end portion 71 than in the vicinity of the closed end portion 73. It is formed so that the vicinity is larger. Particularly, since the through-holes 85 and 85 are formed in the ribs 81B and 81B having a large radial thickness, the effect of changing the cross-sectional secondary moment of the outer column 11 even in a through-hole having a short length in the longitudinal direction of the vehicle body. Is big. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, a first modification of the through hole 85 of the second embodiment will be described. FIG. 11B is an enlarged side view showing an outer column single body having a through hole of a first modified example of the through hole 85 of FIG. The first modification is an example in which a long through hole is formed in the circumferential direction of the outer column 11 at the position R in FIG. The outer column 11 shown in FIG. 11B is not shown, but the slit 7 having the open end 71, the parallel portion 72, the closed end 73, the cut-in groove 74 and the rib 81A having the same shape as that of the first embodiment. , 81B, 81C, and the shape of the through hole is different from FIG.

  At the same axial position as the closed end 73 of the slit 7, the ribs 81B and 81B (the R position surrounded by the two-dot chain line ellipse in FIG. 9) of the outer peripheral surface 11A of the outer column 11 Long through holes 86, 86 are formed in the circumferential direction. The through holes 86 and 86 are formed in the outer column 11 by cutting. The through holes 86 and 86 may be formed by casting at the same time as the outer column 11 is cast. The through holes 86, 86 are formed so as to penetrate the inner peripheral surface 11B from the outer peripheral surfaces 811B, 811B of the ribs 81B, 81B and the side surfaces 812B, 812B on the vehicle body upper side shown in FIG.

  The circumferential length W6 of the through holes 86, 86 is the circumferential direction of the ribs 81B, 81B (the circumferences of the outer peripheral surfaces 811B, 811B of the ribs 81B, 81B and the side surfaces 812B, 812B on the vehicle body upper side shown in FIG. (Direction) is slightly shorter than the length. The length L6 of the through holes 86, 86 in the longitudinal direction of the vehicle body is shorter than the length L5 of the through holes 85, 85 of the second embodiment in the longitudinal direction of the vehicle body.

  That is, since the outer column 11 has the through holes 86 and 86 at the same position as the closed end portion 73 of the slit 7, the second moment of section of the outer column 11 is more open than the vicinity of the closed end portion 73. It is formed so that the vicinity of is larger. In particular, since the ribs 81B and 81B having a large radial thickness are formed with through holes 86 and 86 that are longer in the circumferential direction than the through holes 85 and 85, the longitudinal direction of the vehicle body is greater than that in the second embodiment. Even if the length of the through hole is short, the effect of changing the cross-sectional secondary moment of the outer column 11 is great. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, a second modification of the through hole 85 according to the second embodiment will be described. FIG.11 (c) is an enlarged side view which shows the outer column single-piece | unit which has the through-hole of the 2nd modification of the through-hole 85 of Fig.11 (a). The second modification is an example in which a through hole having a shape in which a long through hole in the axial direction of the outer column 11 and a long through hole in the circumferential direction are connected is formed at the position R in FIG. Although not shown, the outer column 11 shown in FIG. 11 (c) has an open end 71, a parallel portion 72, a closed end 73, a slit 7 having a notch groove 74 and ribs having exactly the same shape as the first embodiment. 81A, 81B, 81C, and the shape of the through hole is different from FIG.

  Through holes 87 and 87 are formed in the ribs 81B and 81B (the R position surrounded by the two-dot chain line ellipse in FIG. 9) on the outer peripheral surface 11A of the outer column 11, respectively. The through holes 87 and 87 have a shape in which through holes 86 and 86 that are long in the circumferential direction are connected to through holes 85 and 85 that are long in the axial direction of the outer column 11.

  In other words, the through holes 86 and 86 are formed as long holes in the circumferential direction of the outer column 11 at the same axial position as the closed end portion 73 of the slit 7. The through holes 85 and 85 are formed in parallel to the axis of the outer column 11 so as to extend from the through holes 86 and 86 to the vehicle body front side, and are formed to positions near the rear end of the vehicle body of the telescopic adjustment long grooves 15A and 15B. Yes.

  The through holes 85, 85, 86, 86 are formed in the outer column 11 by cutting. The through holes 85, 85, 86, 86 may be formed by casting at the same time as the outer column 11 is cast. The through holes 85, 85, 86, 86 are formed so as to penetrate the inner peripheral surface 11B from the outer peripheral surfaces 811B, 811B of the ribs 81B, 81B and the side surfaces 812B, 812B on the upper side of the vehicle body shown in FIG. .

  The circumferential length W7 of the through hole 87 is the circumferential direction of the ribs 81B and 81B (the circumferential direction of the outer peripheral surfaces 811B and 811B of the ribs 81B and 81B and the side surfaces 812B and 812B on the vehicle body upper side shown in FIG. 6). It is formed slightly shorter than the length. The length L7 of the through hole 87 in the longitudinal direction of the vehicle body is formed to be the same as the length L5 of the through holes 85, 85 in the longitudinal direction of the vehicle body in FIG.

  That is, since the outer column 11 has the through holes 87, 87 in the vicinity of the closed end portion 73 of the slit 7, the second moment of section of the outer column 11 is greater in the open end portion 71 than in the vicinity of the closed end portion 73. It is formed so that the vicinity is larger. In particular, the ribs 81B and 81B having a large radial thickness are formed with both the through holes 85 and 85 and the through holes 86 and 86 having a longer circumferential length than the through holes 85 and 85. The effect of changing the cross-sectional secondary moment of the outer column 11 is great. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, the through hole according to the third embodiment of the present invention will be described. FIG. 12A is an enlarged plan view showing a single outer column having a through hole according to Embodiment 3 of the present invention. 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. Example 3 is an example in which a through hole is formed at a position S in FIG.

  Although not shown, the outer column 11 shown in FIG. 12A has an open end 71, a parallel portion 72, a closed end 73, a slit 7 having a cut groove 74 and ribs having exactly the same shape as the first embodiment. 81A, 81B, 81C, and the positions and shapes of the through holes are different from those shown in FIG.

  On the vehicle body upper side of the outer peripheral surface 11A of the outer column 11, between the rib 81C and the rib 81B on the right side in the vehicle width direction, and between the rib 81C and the rib 81B on the left side in the vehicle width direction (two-dot chain line in FIG. 9). Through-holes 88 and 88 are formed in parallel with the axis 16 of the outer column 11 at positions S surrounded by an ellipse. The through holes 88, 88 are a pair of through holes arranged symmetrically with the axis 16 of the outer column 11 interposed therebetween.

  The through holes 88, 88 have a length in the longitudinal direction of the vehicle body of L8 and are formed to extend slightly from the position on the rear side of the vehicle body to the vehicle body front side from the closed end portion 73 of the slit 7, and the vehicle body of the telescopic adjustment long grooves 15A, 15B. The telescopic adjustment long grooves 15 </ b> A and 15 </ b> B are formed to a position that is about one third of the total length beyond the rear end. The circumferential length W8 of the through holes 88, 88 is formed slightly shorter than the circumferential length of the outer peripheral surface 11A between the rib 81C and the rib 81B. That is, the through holes 88 are formed as long holes that are long in the axial direction of the outer column 11.

  The through holes 88, 88 are formed in the outer column 11 by cutting. The through holes 88, 88 may be formed by casting at the same time as the outer column 11 is cast. The through holes 88 are formed so as to penetrate from the outer peripheral surface 11A of the outer column 11 to the inner peripheral surface 11B.

  That is, since the outer column 11 has the through holes 88 and 88 in the vicinity of the closed end portion 73 of the slit 7, the second moment of section of the outer column 11 is greater in the open end portion 71 than in the vicinity of the closed end portion 73. It is formed so that the vicinity is larger. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, a first modification of the through hole 88 of the third embodiment will be described. FIG. 12B is an enlarged plan view showing a single outer column having a through hole of a first modified example of the through hole 88 of FIG. The first modification is an example in which a long through hole in the circumferential direction of the outer column 11 is formed at the position S in FIG. The outer column 11 shown in FIG. 12B is not shown, but the slit 7 having the open end 71, the parallel portion 72, the closed end 73, the cut-in groove 74 and the rib 81A having exactly the same shape as the first embodiment. , 81B, 81C, and the shape of the through hole is different from that in FIG.

  On the vehicle body upper side of the outer peripheral surface 11A of the outer column 11, at the same axial position as the closed end 73 of the slit 7, between the rib 81C and the rib 81B on the right side in the vehicle width direction, and between the rib 81C and the vehicle width. Through holes 89 and 89 that are long in the circumferential direction of the outer column 11 are formed between the rib 81 </ b> B on the left side in the direction (position S surrounded by an ellipse of a two-dot chain line in FIG. 9). The through-holes 89 and 89 are a pair of through-holes arranged symmetrically across the axis 16 of the outer column 11.

  The through holes 89 and 89 are formed in the outer column 11 by cutting. The through holes 89, 89 may be formed by casting at the same time as the outer column 11 is cast. The through holes 89 and 89 are formed so as to penetrate the inner peripheral surface 11B from the vehicle body upper side of the outer peripheral surface 11A of the outer column 11 and the side surfaces 812B and 812B of the ribs 81B and 81B on the vehicle body upper side shown in FIG. ing.

  The circumferential length W9 of the through holes 89, 89 is the circumferential direction between the rib 81C and the rib 81B (the outer surface 11A on the vehicle body upper side shown in FIG. 6 and the side surface on the vehicle body upper side of the ribs 81B, 81B). It is formed slightly shorter than the length in the circumferential direction of 812B. The length L9 of the through holes 89, 89 in the vehicle longitudinal direction is formed shorter than the length L8 of the through holes 88, 88 of the third embodiment in the vehicle longitudinal direction.

  That is, since the outer column 11 has the through holes 89 and 89 at the same position as the closed end portion 73 of the slit 7, the secondary moment of section of the outer column 11 is more open than the vicinity of the closed end portion 73. It is formed so that the vicinity of is larger. In particular, through-holes 89 and 89 that are longer in the circumferential direction than the through-holes 88 and 88 are formed in the side surfaces 812B and 812B on the vehicle body upper side of the ribs 81B and 81B having a large radial thickness. Even if the through hole has a shorter length in the longitudinal direction of the vehicle body than in the third embodiment, the effect of changing the secondary moment of the section of the outer column 11 is great. Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  Next, a second modification of the through hole 88 of the third embodiment will be described. FIG. 12C is an enlarged plan view showing a single outer column having a through hole of a second modified example of the through hole 88 of FIG. The second modification is an example in which a through hole having a shape in which a long through hole in the axial direction of the outer column 11 and a long through hole in the circumferential direction are connected is formed at the position S in FIG. Although not shown, the outer column 11 shown in FIG. 12C has an open end 71, a parallel portion 72, a closed end 73, a slit 7 having a cut groove 74 and ribs having exactly the same shape as the first embodiment. 81A, 81B, 81C, and the shape of the through hole is different from FIG.

  On the vehicle body upper side of the outer peripheral surface 11A of the outer column 11, between the rib 81C and the rib 81B on the right side in the vehicle width direction, and between the rib 81C and the rib 81B on the left side in the vehicle width direction (two-dot chain line in FIG. 9). Through-holes 90 and 90 are respectively formed at positions S surrounded by an ellipse. The through holes 90, 90 have a shape in which through holes 89, 89 that are long in the circumferential direction are connected to through holes 88, 88 that are long in the axial direction of the outer column 11. The through-holes 90 and 90 are a pair of through-holes arranged symmetrically across the axis 16 of the outer column 11.

  That is, the through-holes 89 and 89 are provided between the rib 81C and the rib 81B on the right side in the vehicle width direction at the same axial position as the closed end 73 of the slit 7 on the vehicle body upper side of the outer peripheral surface 11A of the outer column 11. And a long hole in the circumferential direction of the outer column 11 between the rib 81C and the rib 81B on the left side in the vehicle width direction (position S surrounded by an ellipse of a two-dot chain line in FIG. 9). Yes. The through holes 88, 88 are formed in parallel to the axis 16 of the outer column 11 so as to extend from the through holes 89, 89 to the vehicle body front side, and extend beyond the vehicle body rear end of the telescopic adjustment long grooves 15A, 15B. The long grooves 15A and 15B for use are formed up to about one third of the total length.

  The through holes 88, 88, 89, 89 are formed in the outer column 11 by cutting. The through holes 88, 88, 89, 89 may be formed by casting at the same time when the outer column 11 is cast. The through holes 88, 88, 89, 89 penetrate the inner peripheral surface 11B from the side surface 812B, 812B on the vehicle body upper side of the outer peripheral surface 11A of the outer column 11 and the vehicle body upper side of the ribs 81B, 81B shown in FIG. Is formed.

  The circumferential length W10 of the through holes 90, 90 is the circumferential direction between the rib 81C and the rib 81B (the outer surface 11A on the vehicle body upper side shown in FIG. 6 and the side surface on the vehicle body upper side of the ribs 81B, 81B). It is formed slightly shorter than the length in the circumferential direction of 812B. The length L10 of the through holes 90, 90 in the longitudinal direction of the vehicle body is formed to be the same as the length L8 of the through holes 88, 88 in the longitudinal direction of the vehicle body of FIG.

That is, since the outer column 11 has the through holes 90 and 90 in the vicinity and the same position of the closed end portion 73 of the slit 7, the secondary moment of section of the outer column 11 is more open than the vicinity of the closed end portion 73. The vicinity of the portion 71 is formed to be larger. In particular, the through holes 88, 88 and the through holes 89, 89 having a longer circumferential length than the through holes 88, 88 are formed in the outer peripheral surface 11A on the upper side of the vehicle body and the side surface 812B of the ribs 81B, 81B on the upper side of the vehicle body. Since both are formed, the effect of changing the cross-sectional secondary moment of the outer column 11 is great.
Therefore, the rigidity of the outer column 11 is formed larger in the vicinity of the open end 71 of the slit 7 than in the vicinity of the closed end 73.

  In the above embodiment, the case where the present invention is applied to a tilt / telescopic steering device capable of both tilt position adjustment and telescopic position adjustment has been described, but the present invention is applied to a telescopic steering device capable of only telescopic position adjustment. The invention may be applied.

  In the above-described embodiment, an example in which the inner column 10 is applied to a steering device in which the inner column 10 is disposed on the front side of the vehicle body and the outer column 11 is disposed on the rear side of the vehicle body has been described. You may apply to the steering device arrange | positioned.

1 column 10 inner column (lower column)
10A outer peripheral surface 10C rear end of vehicle body 11 outer column (upper column)
11A outer peripheral surface 11B inner peripheral surface 111 outer column vehicle body front side end surface 12 steering shaft 12A upper steering shaft 121 steering wheel 13A, 13B clamp member 131A, 131B clamp member vehicle body rear side end surface 132A, 132B clamp member vehicle body front side end surface 14A, 14B Outer surface 15A, 15B Telescopic adjustment long groove 16 Axes 17A, 17B Flange 18 Engagement protrusion 181 Semicircular portion 182 Linear portion 183 Inner surface 21 Universal joint 22 Intermediate shaft 221 Intermediate inner shaft 222 Intermediate outer shaft 23 Universal joint 24 Steering gear 25 Tie rod 3 Upper bracket (Body mounting bracket)
32 Upper plate 33, 34 Side plate 331, 341 Inner side surface 35, 36 Long groove for tilt adjustment 41 Car body 42 Capsule 5 Tightening rod 51 Head 53 Fixed cam 54 Movable cam 55 Operation lever 56 Thrust bearing 57 Nut 58 Male screw 6 Electric power steering device 61 Flange 62 Tilt center axis 63 Output shaft 7 Slit 71 Open end 72 Parallel part 73 Closed end 74 Cut groove 81A, 81B, 81C Rib 811B Outer peripheral surface 812B Side surface 82 Through hole 821 Car body front end 83, 84, 85, 87 , 88, 89, 90 Through hole

Claims (7)

Inner column,
A hollow cylindrical outer column having an inner peripheral surface that is fitted on the outer peripheral surface of the inner column so as to be relatively slidable in the axial direction of the inner column;
The outer column is provided on the outer column, and is formed so as to penetrate from the outer peripheral surface to the inner peripheral surface from the axial front end of the outer column in the axial direction to the central portion on the rear side of the vehicle. A slit having an open end and a closed end on the rear side of the vehicle body,
It is provided integrally with the outer column , protrudes to the lower side of the vehicle body, is arranged on the left and right of the slit, is formed so as to be able to approach and separate from each other through the slit, and elastically deforms the inner peripheral surface of the outer column. A pair of clamp members that expand and contract the diameter, and clamp / unclamp the outer peripheral surface of the inner column from both sides in the vehicle body width direction;
A shaft center of the outer column and the slit at a position of the closed end of the slit, which is provided on the outer periphery in the circumferential direction of the outer column and becomes a fulcrum where the width of the slit is narrowed by elastic deformation of the pair of clamp members About a third of the total length of the telescopic adjustment long groove formed in the clamp member , extending from the position of the rear end of the vehicle slightly toward the front of the vehicle body at a position symmetrical with respect to the width direction of the vehicle body. a through hole formed to the position,
The inner column protrudes radially outward from the rear end of the vehicle body and is formed by inserting the outer peripheral surface of the inner column into the inner peripheral surface of the outer column and then bending it into a U shape from the rear end of the vehicle body toward the front end of the vehicle body. A steering apparatus, comprising: an engaging protrusion made of a rectangular thin plate for engaging with the through hole and preventing the inner column from coming out of the outer column . The steering apparatus according to claim 1, wherein
The steering device , wherein the through hole is formed on a vehicle body upper side of the outer column . In the steering device according to claim 1 or 2 ,
The steering device according to claim 1, wherein the through hole is formed as a long hole that is long in the axial direction of the outer column. In the steering device according to claim 1 or 2 ,
The steering device according to claim 1, wherein the through hole is a long hole that is long in a circumferential direction of the outer column. In the steering device according to claim 1 or 2 ,
The through-hole has a shape in which a long hole that is long in the axial direction of the outer column and a long hole that is long in the circumferential direction are connected . In the steering device according to any one of claims 1 to 5 ,
The steering device according to claim 1, wherein the through hole is formed in a rib formed on the outer peripheral surface of the outer column so as to protrude radially outward . In the steering device according to any one of claims 1 to 5 ,
The steering device according to claim 1, wherein the through-hole is composed of a pair of through-holes arranged symmetrically across the axis of the outer column.

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