JP2012046111A - Position adjusting type steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the number of electric motors more in a position adjusting type steering device.SOLUTION: An upper jacket 16 of a position adjusting type steering device 1 supports a steering shaft 3 in such a way that it can be rotated, and causes the same to be moved together with a steering wheel when its tilting adjustment and its telescopic adjustment are carried out. A first cam member 61 of a tilting telescopic lock mechanism 50 is pivoted around a central axis line L1 and pivoted in respect to a second cam member 62. With this arrangement as above, it is possible to change over between its tilt lock state and the state that tilt lock is released. In addition, a first cam member 61 of the tilting telescopic lock mechanism 50 is pivoted around the central axis line L1 and pivoted in respect to a third cam member 63. With this arrangement as above, it is possible to change over between its telescopic lock state and its state that telescopic lock is released. A position adjusting mechanism 31 causes the upper jacket 16 to be displaced under a rotating operation of a first electric motor 33 under both cases of tilt adjusting operation and telescopic adjusting operation.

Description

  The present invention relates to a position-adjustable steering apparatus.

Some steering devices for automobiles and the like are capable of tilt adjustment for adjusting the vertical position of the steering wheel and telescopic adjustment for adjusting the front-back position (see, for example, Patent Document 1).
Patent Document 1 discloses a configuration using three motors: a drive motor, a telescopic lock motor, and a tilt lock motor. When the tilting and telescopic operations are not performed during vehicle driving or the like, both the telescopic lock nut and the tilt lock nut are tightened by the telescopic lock motor and the tilt lock motor. Thereby, the position of the steering wheel is fixed with respect to the tilt direction and the telescopic direction. When performing a telescopic operation, the telescopic lock nut is unfastened by driving the telescopic lock motor. In this state, the telescopic operation is performed by driving the drive motor. On the other hand, when the tilt operation is performed, the tilt lock nut is unfastened by driving the tilt lock motor. In this state, the tilting operation is performed by driving the drive motor.

JP-A-6-329027

  In Patent Document 1, three motors are necessary to enable the tilting operation and telescopic operation of the steering wheel, and to lock and unlock the position of the steering wheel, and the number of motors is large. If the number of motors is large, the cost, weight, and assembly of the steering device will increase. Moreover, the arrangement space for the steering device is increased.

  The present invention has been made under such a background, and an object thereof is to further reduce the number of electric motors in a position-adjustable steering apparatus capable of performing tilt adjustment and telescopic adjustment.

  In order to achieve the above object, the present invention provides a tilt adjustment function for adjusting the position of the steering member (2) in the tilt direction (X1) around a predetermined tilt central axis (29), and the position of the steering member. In the position-adjustable steering device (1) having a telescopic adjustment function (Y1) for adjusting the telescopic direction (Y1) along the axial direction (S1) of the steering shaft (3), the steering shaft is rotatably supported and tilt adjustment is performed. Tilt and telescopic lock that releasably locks the movable jacket (16) that moves with the steering member at the time and during telescopic adjustment, and the fixed member (23) that is fixed to the vehicle body (13, 14). A mechanism (50) for driving the movable jacket in the tilt direction and the telescopic direction; And a tilt / telescopic lock mechanism that is displaceable about a predetermined center axis (L1) to a predetermined tilt / telescopic lock position, a tilt adjustment position, and a telescopic adjustment position. When the member (61) and the first member are located at the tilt / telescopic lock position and the telescopic adjustment position, a first regulating force (F1) for regulating movement of the movable jacket in the tilt direction ), And the movement of the movable jacket in the telescopic direction when the first member is located at the tilt / telescopic lock position and the tilt adjustment position. A third member (83) for generating a second regulating force (F21, F22), wherein the position adjusting mechanism includes an electric motor (33) A worm shaft (41) connected to the electric motor and extending in the telescopic direction, a worm wheel (42) meshing with the worm shaft, a pinion (43) rotating in conjunction with the worm wheel, and meshing with the pinion A rack (44) extending along the tilt direction and a connecting member (45) for connecting the rack and the movable jacket so as to be able to move together are included (claim 1).

According to the present invention, when the first member is located at the tilt / telescopic lock position, the second member generates the first restricting force, and the third member generates the second restricting force. Yes. Accordingly, it is possible to realize a tilt / telescopic lock in which the movable jacket is restricted from moving in the tilt direction and the telescopic direction.
Further, when the first member is positioned at the tilt adjustment position, the second member does not generate the first regulating force, and the movable jacket can move in the tilt direction. On the other hand, the third member generates the second regulating force, and the movable jacket cannot move in the telescopic direction. In this state, when the worm shaft is rotated by the electric motor, the worm wheel and the pinion rotate. As a result, the rack meshing with the pinion is displaced in the tilt direction, and as a result, the movable jacket is displaced in the tilt direction together with the rack. Thereby, tilt adjustment is possible.

  When the first member is in the telescopic adjustment position, the second member generates the first regulating force, and the movable jacket cannot move in the tilt direction. At this time, the third member does not generate the second regulating force, and the movable jacket is movable in the telescopic direction. As a result, the movable jacket and the rack cannot be displaced in the tilt direction, and the rotation of the pinion meshing with the rack and the rotation of the worm wheel connected to the pinion are restricted. When the worm shaft is rotated by the electric motor in this state, the worm wheel is displaced in the axial direction (telescopic direction) of the worm shaft without rotating. As a result, the pinion, the rack, and the movable jacket are also displaced in the telescopic direction. Thereby, telescopic adjustment is possible.

  As described above, the movable jacket can be displaced in the tilt direction and the telescopic direction with one electric motor that rotates the worm shaft. Even if an electric motor for rotating the first member about the central axis is provided, the movable jacket is locked, the movable jacket is tilted, and the movable jacket is telescopically adjusted with two electric motors. Can do. Further, when the first member is manually rotated around the central axis, a motor for rotating the first member is also unnecessary. Thereby, the number of electric motors can be reduced.

  In the present invention, each of the fixed member and the movable jacket is provided with side plates (23a, 23b, 30a, 30b), and one of the side plates (23a, 23b) is provided along the tilt direction. An extending insertion hole (23d, 23e) is formed, and the other side plate (30a, 30b) is formed with an insertion hole (30c, 30d) extending along the telescopic direction. Each of the insertion holes includes a support shaft (51), the first member is supported by the support shaft so as to be integrally rotatable, and the second member and the third member are relatively rotatable with respect to the support shaft. (Claim 2).

In this case, the first member can be displaced to each position with a simple configuration of rotating the support shaft. As a result, the number of parts of the position adjustment type steering device can be further reduced.
In the present invention, the first member includes a first cam member (61), and the second member is a second cam member (between the first cam member and the one side plate). 62), and the first cam member and the second cam member may be pressed against the one side plate by the relative rotation of the first cam member and the second cam member to generate the first regulating force. ).

  In this case, the force for rotating the first cam member and the second cam member relative to each other can be converted into a force for the second cam member to press one side plate. Accordingly, the first restricting force can be generated by the second cam member with a simple configuration in which the first cam member and the second cam member are relatively rotated. Therefore, the configuration for generating the first regulating force can be simplified, and the number of parts of the position-adjustable steering apparatus can be further reduced.

  In the present invention, the apparatus further includes a jacket (17) supported by the vehicle body so as to be restricted from moving in the telescopic direction, and fitted to the movable jacket, and the third member is integrated with the support shaft. There may be a case where the movable member and the pressing member (53) that generates the second restricting force by pressing the movable jacket and the jacket are connected in rotation (claim 4).

In this case, the second regulating force can be generated by the pressing member pressing the movable jacket against the jacket during the tilt adjustment. Thereby, it is possible to suppress the movable jacket from being inadvertently displaced in the telescopic direction during the tilt adjustment.
In the present invention, the first member includes a first cam member, and the third member includes a third cam member (63) disposed between the first cam member and the other side plate. In addition, due to the relative rotation of the first cam member and the third cam member, the third cam member may be pressed against the other side plate to generate the second regulating force (Claim 5).

  In this case, the force for rotating the first cam member and the third cam member relative to each other can be converted into a force for the third cam member to press the other side plate. Accordingly, the second restricting force can be generated by the third cam member with a simple configuration in which the first cam member and the third cam member are relatively rotated. Therefore, the configuration for generating the second regulating force can be simplified, and the number of parts of the position-adjustable steering device can be reduced.

In the present invention, there may be further provided a second electric motor (75) for rotating the first member around the central axis (Claim 6).
In this case, the second electric motor is driven in a state in which the movable jacket is tilt-locked and telescopically locked (tilt / telescopic lock state), a state in which the movable jacket can be tilt-adjusted, and a state in which the movable jacket can be telescopically adjusted. Can be switched. Further, the movable jacket can be displaced in the tilt direction and the telescopic direction by an electric motor that drives the worm shaft. Thus, only two electric motors are required for locking and position adjustment of the movable jacket, and the number of electric motors can be reduced.

  For example, when the power of the vehicle is turned off, the movable jacket may be positioned at the upper end in the tilt direction and the front end in the telescopic direction by the operation of each electric motor. In this case, when the driver is seated in the driver's seat and the vehicle is turned on (ignition on), each electric motor is operated. Thereby, the movable jacket is moved in the tilt direction and the telescopic direction by a predetermined amount. As a result, when the driver gets on and off the vehicle, the steering member does not get in the way, and when the driver sits on the driver's seat, the steering member can be automatically arranged at a pre-stored position. it can. Thereby, the convenience regarding getting on and off of a driver | operator's vehicle can be made higher.

  In addition, in the above, the numbers in parentheses represent reference numerals of corresponding components in the embodiments described later, but the scope of the claims is not limited by these reference numerals.

It is a mimetic diagram showing a schematic structure of a position adjustment type steering device concerning one embodiment of the present invention. It is a schematic side view of a position adjustment type steering device. It is sectional drawing of an upper fixing bracket periphery, and has shown the cut surface orthogonal to an axial direction. It is sectional drawing which follows the IV-IV line of FIG. FIG. 5 is a partial cross-sectional view taken along line VV in FIG. 3. FIG. 4 is an enlarged view around the left cam mechanism in FIG. 3. It is a perspective view of the left cam mechanism. It is sectional drawing which follows the VIII-VIII line of FIG. (A), (B) is sectional drawing for demonstrating the position adjustment type steering device at the time of tilt adjustment, respectively. (A), (B) is a typical side view of the principal part of the position-adjustable steering apparatus, showing the operation at the time of tilt adjustment. (A), (B) is sectional drawing for demonstrating the position adjustment type steering device at the time of telescopic adjustment, respectively. (A), (B) is a typical side view of the principal part of the position adjustment type steering apparatus which shows the operation | movement of telescopic adjustment.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing a schematic configuration of a position adjustment type steering apparatus according to an embodiment of the present invention. FIG. 2 is a schematic side view of the position adjustment type steering apparatus. In the following, front and rear, left and right, and top and bottom refer to front and rear, left and right, and top and bottom of a vehicle.
Referring to FIG. 1, a position-adjustable steering apparatus 1 is connected to a steering shaft 3 having one end 3 a to which a steering wheel 2 as a steering member is connected, and to the other end 3 b of the steering shaft 3 via a universal joint 4. A rack as a steered shaft having the intermediate shaft 5, the pinion shaft 7 connected to the intermediate shaft 5 via a universal joint 6, and a rack 8 a that meshes with the pinion 7 a provided near the end of the pinion shaft 7. A shaft 8 is provided.

  A steering mechanism A1 is configured by a rack and pinion mechanism including the pinion shaft 7 and the rack shaft 8. The rack shaft 8 is supported by a housing 10 fixed to the vehicle body side member 9 so as to be movable in an axial direction along the left-right direction of the vehicle (a direction orthogonal to the paper surface). Although not shown, each end of the rack shaft 8 is connected to a corresponding steered wheel via a corresponding tie rod and a corresponding knuckle arm.

The steering shaft 3 includes an upper shaft 11 and a lower shaft 12 that are connected so as to be integrally rotatable and relatively movable in the axial direction using, for example, spline coupling. The steering shaft 3 is rotatably supported by a steering column 15 supported by vehicle body side members (vehicle bodies) 13 and 14 via a bearing (not shown).
The steering column 15 is connected to a column jacket 39 including a cylindrical upper jacket 16 (corresponding to a movable jacket) and a cylindrical lower jacket 17 that are fitted so as to be relatively movable in the axial direction, and a lower axial end of the lower jacket 17. Housing 18. The upper jacket 16 rotatably supports the upper shaft 11 of the steering shaft 3 and moves along with the steering wheel 2 during tilt adjustment and telescopic adjustment.

The lower jacket 17 is supported by the housing 18 and can rotate around the tilt center axis 29, but is restricted from moving in the axial direction S1 (the telescopic direction Y1 to be described later).
The housing 18 houses a speed reduction mechanism 20 that decelerates the power of a steering assist motor 19 for assisting steering and transmits the power to the lower shaft 12. The speed reduction mechanism 20 includes a drive gear 21 connected to a rotation shaft (not shown) of the steering assist motor 19 so as to be integrally rotatable, and a driven gear 22 that meshes with the drive gear 21 and rotates integrally with the lower shaft 12. Yes.

  The steering column 15 is supported by vehicle body side members 13 and 14 (for example, cross members) via an upper fixing bracket 23 as a fixing member on the vehicle rear side and a lower fixing bracket 24 on the vehicle front side. The upper fixing bracket 23 can fix the upper jacket 16 (movable jacket) of the steering column 15 via a tilt / telescopic lock mechanism 50 and an upper column bracket 30 (see FIG. 3) described later.

1 and 2, the upper fixing bracket 23 includes a fixing bolt (stud bolt) 25 protruding downward from the vehicle body side member 13, a nut 26 screwed into the fixing bolt 25, and the upper fixing bracket 23. The capsule 27 is detachably held on the vehicle body side member 13 so as to be detachable at the time of impact absorption.
A lower column bracket 28 is fixed to the housing 18 of the steering column 15. The lower column bracket 28 is supported by a lower fixing bracket 24 fixed to the vehicle body side member 14 so as to be rotatable around the tilt center axis 29 via a tilt center axis 29 as a pivot axis. Thereby, the steering column 15 is rotatable around the tilt center axis 29. That is, the steering column 15, the steering shaft 3, and the steering wheel 2 can be rotated in the tilt direction X 1 around the tilt center axis 29.

  The position-adjustable steering device 1 has a tilt adjustment function that adjusts the position of the steering wheel 2 to a tilt direction X1 (substantially equivalent to a swing direction about the tilt center axis 29) that is substantially the vertical direction. Have. Further, the position-adjustable steering device 1 has a telescopic adjustment function for adjusting the position of the steering wheel 2 in a telescopic direction Y1 along the axial direction S1 of the steering shaft 3.

FIG. 3 is a cross-sectional view around the upper fixing bracket 23 and shows a cut surface orthogonal to the axial direction S1. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a partial cross-sectional view taken along line VV in FIG.
Referring to FIG. 3, the upper fixing bracket 23 is formed in a groove shape opened downward, and a pair of a top plate 23 c through which the fixing bolt 25 is inserted and a pair extending downward with respect to the top plate 23 c. Side plates 23a and 23b. The side plates 23a and 23b are arranged side by side in the left-right direction RL. The side plates 23a and 23b are provided with vertically long insertion holes 23d and 23e extending along the tilt direction X1.

As shown in FIG. 2, the vertically long insertion holes 23d and 23e are formed in an arc shape centered on the tilt center axis 29 (in FIG. 2, the vertically long insertion holes 23e are not shown). When the distance between the tilt center axis 29 and the vertically long insertion holes 23d and 23e is long, the vertically long insertion holes 23d and 23e have a shape that extends substantially vertically.
Referring to FIG. 3, column jacket 39 and steering shaft 3 are arranged between the pair of side plates 23a, 23b.

An upper column bracket 30 is provided at the lower end of the upper jacket 16 of the column jacket 39. The upper column bracket 30 includes a pair of side plates 30 a and 30 b that are fixed to the upper jacket 16 and extend downward from the upper jacket 16.
The pair of side plates 30 a and 30 b extends in the telescopic direction Y <b> 1 (direction perpendicular to the paper surface) and is parallel to the pair of side plates 23 a and 23 b of the upper fixing bracket 23. A pair of side plates 30a, 30b of the upper column bracket 30 is disposed between the pair of side plates 23a, 23b. The side plates 30a and 30b are formed with insertion holes 30c and 30d extending along the telescopic direction Y1. As illustrated in FIG. 4, the insertion holes 30 c and 30 d are formed in a rectangular shape that is long in the telescopic direction Y <b> 1 in a side view, for example.

Referring to FIG. 3, a connecting plate 30f is fixed to the lower ends of the side plates 30a and 30b. The connecting plate 30f is disposed between the pair of side plates 23a and 23b. The connecting plate 30f is provided to connect the upper jacket 16 and a position adjusting mechanism 31 described later. The connecting plate 30f extends along the telescopic direction Y1.
A position adjustment mechanism 31 is disposed below the connecting plate 30f. The position adjustment mechanism 31 is provided to drive the upper jacket 16 (steering wheel) in the tilt direction X1 and the telescopic direction Y1.

With reference to FIGS. 3 and 5, the position adjustment mechanism 31 includes a casing 32 fixed to the right side plate 23 b of the upper fixing bracket 23, a first electric motor 33, and a first transmission mechanism 34. .
The first electric motor 33 is connected to a control unit (not shown) including a CPU, a ROM, and a RAM, and is controlled by this control unit.

The first transmission mechanism 34 is provided to transmit the output of the first electric motor 33 to the upper jacket 16. The first transmission mechanism 34 includes a worm reduction mechanism 35, a first support shaft 36, and a rack and pinion mechanism 37.
The casing 32 accommodates a first electric motor 33 and a worm reduction mechanism 35. A motor housing 33 a of the first electric motor 33 is fixed to the casing 32. The output shaft 33b of the first electric motor 33 extends in parallel with the telescopic direction Y1.

The worm reduction mechanism 35 includes a worm shaft 41 and a worm wheel 42 that mesh with each other. The worm shaft 41 extends along the telescopic direction Y1 and is coupled to the output shaft 33b of the first electric motor 33 so as to be integrally rotatable. The worm wheel 42 is disposed below the worm shaft 41.
The first support shaft 36 extends along the left-right direction RL of the vehicle and penetrates the upper fixing bracket 23 to the left and right. A worm wheel 42 is coupled to the right end portion of the first support shaft 36 so as to be integrally rotatable. At the lower ends of the side plates 23a and 23b of the upper fixing bracket 23, horizontally elongated holes 23f and 23g extending along the telescopic direction Y1 are formed. A first support shaft 36 is inserted through the horizontally long holes 23f and 23g. The first support shaft 36 is rotatably supported by the side plates 23 a and 23 b of the upper fixing bracket 23. As a result, the first support shaft 36 can move relative to the upper fixing bracket 23 in the telescopic direction Y1, and the relative movement in the tilt direction X1 is restricted.

  The rack and pinion mechanism 37 includes a pinion 43, a rack 44, and a connecting portion 45 as a connecting member provided with the rack 44. By moving the rack 44 in the tilt direction X1 by the rotation of the pinion 43, the upper jacket 16 (steering wheel) moves in the tilt direction X1. Further, by restricting the rotation of the pinion 43, the pinion 43 and the rack 44 are moved in the telescopic direction Y1. Thereby, the upper jacket 16 is movable in the telescopic direction Y1.

  The pinion 43 and the rack 44 are provided as one set or a plurality of sets (in this embodiment, two sets separated in the left-right direction RL). Each pinion 43, 43 is disposed below the connecting plate 30f. Each pinion 43 and 43 is connected to the first support shaft 36 so as to be integrally rotatable. Each rack 44, 44 extends vertically along the tilt direction X1 and meshes with the corresponding pinion 43, 43, respectively.

  Corresponding to the rack 44, a connecting portion 45 is provided. The connecting portion 45 connects the pinion 43, the rack 44, and the upper jacket 16 so that they can move in the telescopic direction Y1. The number of connecting portions 45 is the same as the number of racks 44 (two in this embodiment). Each of the connecting portions 45, 45 is formed in an inverted U shape and sandwiches the corresponding pinion 43 in the telescopic direction Y1.

The upper portions 45a and 45a of the connecting portions 45 and 45 are fixed to the bottom surface of the connecting plate 30f, and can move together with the upper bracket 30 and the upper jacket 16. The connecting portions 45, 45 have a pair of wall portions 45 b, 45 c that extend downward from the upper portions 45 a, 45 a along the tilt direction X and sandwich the pinions 43, 43 in the axial direction Y.
Racks 44 and 44 are respectively formed on opposing surfaces of the connecting portions 45 and 45 facing the corresponding pinions 43 and 43 among the one wall portions 45b and 45b. As a result, the racks 44 and 44 can move together with the upper bracket 30 and the upper jacket 16.

  Of the other wall portions 45 b and 45 c, facing surfaces 45 d and 45 e that face the corresponding pinions 43 and 43 are formed as flat surfaces that can come into contact with the pinion 43. When the racks 44, 44 are displaced in the tilt direction X1 by the rotation of the pinions 43, 43, the pinions 43, 43 have a gap with the facing surfaces 45d, 45e, and the facing surfaces 45d, 45e Do not touch.

On the other hand, when the rotation of each pinion 43, 43 is restricted and the driving force directed to one of the telescopic directions Y1 (rear of the vehicle) acts on each pinion 43, 43, each pinion 43, 43 is , Abut against the corresponding facing surfaces 45d, 45e.
Referring to FIG. 3, the position-adjustable steering device 1 has a tilt / telescopic lock mechanism 50. The tilt / telescopic lock mechanism 50 is provided to releasably lock the upper jacket 16 with respect to the upper fixing bracket 23.

The tilt / telescopic lock mechanism 50 includes a second support shaft 51, cam mechanisms 52 </ b> L and 52 </ b> R, and a pressing member 53.
The second support shaft 51 has a central axis L1 extending along the left-right direction RL. The second support shaft 51 is inserted through the insertion holes 23d, 30c, 30d, and 23e of the left side plate 23a, the left side plate 30a, the right side plate 30b, and the right side plate 23b. The second support shaft 51 moves along with the upper jacket 16 in the tilt direction X1 when the upper jacket 16 is displaced in the tilt direction X1. Further, the second support shaft 51 does not move in the telescopic direction Y1 when the upper jacket 16 is displaced in the telescopic direction Y1.

  A male thread portion 46 is formed at the left end portion of the second support shaft 51. A nut 48 with a washer is screwed to the male screw portion 46. The nut 48 is in contact with the outer surface of the side plate 23 a of the upper fixing bracket 23. A male thread portion 47 is formed at the right end portion of the second support shaft 51. A nut 49 with a washer is screwed to the male screw portion 47. The nut 49 is in contact with the outer surface of the side plate 23 b of the upper fixing bracket 23.

With the above configuration, the pair of side plates 23a and 23b of the upper fixing bracket 23 is sandwiched by the pair of nuts 48 and 49, and the interval between the pair of side plates 23a and 23b is restricted from being widened. Further, the movement of the second support shaft 51 in the left-right direction RL is restricted.
The cam mechanism 52L is disposed between the left side plate 23a of the upper fixing bracket 23 and the left side plate 30a of the upper column bracket 30. The cam mechanism 52 </ b> R is disposed between the right side plate 23 b of the upper fixing bracket 23 and the right side plate 30 b of the upper column bracket 30.

Since the cam mechanism 52L and the cam mechanism 52R have a symmetrical configuration, the cam mechanism 52L will be mainly described below, and a detailed description of the cam mechanism 52R will be omitted.
The cam mechanism 52L includes a tilt / telescopic lock state in which the upper jacket 16 (steering wheel) is restricted from moving in the tilt direction X1 and the telescopic direction Y1, and the upper jacket 16 is displaceable in the tilt direction X1 and the telescopic direction Y1. Is provided to switch between a tilt adjustment state incapable of being displaced and a telescopic adjustment state in which the upper jacket 16 is displaceable in the telescopic direction Y1 and cannot be displaced in the tilt direction X1.

The cam mechanism 52L includes a first cam member 61, a second cam member 62, and a third cam member 63 supported by the second support shaft 51.
The first cam member 61 is provided as a first member, and the second cam member 62 is provided as a second member. The third cam member 63 forms a third member 83 in cooperation with the pressing member 53. FIG. 3 shows a state in which the first cam member 61 is positioned at the tilt / telescopic lock position.

Each of the cam members 61, 62, 63 is an integrally molded product formed using a synthetic resin or the like, and has a central axis that coincides with the central axis L 1 of the second support shaft 51. That is, the center axis L1 is the center axis L1 of the second support shaft 51, and is also the center axis of each cam member 61, 62, 63.
FIG. 6 is an enlarged view of the periphery of the cam mechanism 52L of FIG. FIG. 7 is a perspective view of the cam mechanism 52L. With reference to FIGS. 6 and 7, the first cam member 61 is formed in a cylindrical shape, and is fixed to the outer peripheral surface of the second support shaft 51 using an adhesive or the like. Thereby, the first cam member 61 can rotate integrally around the first support shaft 51. The second support shaft 51 and the first cam member 61 are restricted from moving in the left-right direction RL relative to the upper fixing bracket 23.

  One end surface 61 a of the first cam member 61 faces the second cam member 62. The one end face 61a is formed in an annular shape. One end surface 61a is formed with one or a plurality of convex portions 71a. In the present embodiment, the convex portions 71 a are arranged at two locations at equal intervals in the circumferential direction C <b> 1 of the second support shaft 51. Each of the convex portions 71 a and 71 a protrudes toward the second cam member 62. Each convex part 71a, 71a has a width of about several degrees with respect to the circumferential direction C1. Both end portions of each convex portion 71a, 71a in the circumferential direction C1 are formed in a tapered shape that smoothly inclines from the one end surface 61a.

  The other end surface 61 b of the first cam member 61 faces the third cam member 63. The other end surface 61b is formed in an annular shape. One or more convex portions 71b are formed on the other end surface 61b. In the present embodiment, the convex portions 71 b are arranged at two locations at equal intervals in the circumferential direction C <b> 1 of the second support shaft 51. The convex portion 71b and the convex portion 71a are arranged symmetrically. That is, the positions (phases) of the convex portions 71a and the convex portions 71b in the circumferential direction C1 are aligned. Each of the convex portions 71 b and 71 b protrudes toward the third cam member 63. Each convex part 71b, 71b has a width of about several degrees with respect to the circumferential direction C1. Both end portions of each convex portion 71b, 71b in the circumferential direction C1 are formed in a tapered shape that smoothly inclines from the other end surface 61b.

  The second cam member 62 is disposed between the first cam member 61 and the left side plate 23 a of the upper fixing bracket 23. The second cam member 62 is formed in a cylindrical shape, and is fitted to the outer peripheral surface of the second support shaft 51 via the bush 64 so as to be relatively rotatable. Note that the bush 64 may be eliminated, and the second cam member 62 may be fitted to the second support shaft 51 without the bush 64 interposed.

  The second cam member 62 includes a main body 62a and a protruding piece portion 62b protruding leftward from the main body 62a. The main body 62 a is formed in a columnar shape, and has one end surface 62 c that faces the one end surface 61 a of the first cam member 61. Convex portions 72a, 72a, 72b, 72b are formed on the one end surface 62c. The convex portions 72a, 72a, 72b, and 72b are simply referred to as the convex portion 72 when collectively referred to. The number of convex portions 72 is four (four in the present embodiment) twice the number of convex portions 71 a of the first cam member 61. Each protrusion 72 protrudes toward the first cam member 61. Each convex portion 72 has a width of about several degrees with respect to the circumferential direction C1. Both end portions of each convex portion 72 in the circumferential direction C1 are formed in a tapered shape that smoothly inclines from the one end surface 62c.

The convex portions 72a and 72a are arranged at equal intervals in the circumferential direction C1. Similarly, the convex portions 72b and 72b are arranged at equal intervals in the circumferential direction C1. The positions of the convex portions 72a and 72a and the positions of the convex portions 72b and 72b are shifted by, for example, 120 degrees with respect to one C11 in the circumferential direction C1.
As shown in FIG. 6, when the first cam member 61 is in the tilt / telescopic lock position, the positions of the convex portions 72a and 72a of the second cam member 62 are the convex portions of the first cam member 61 with respect to the circumferential direction C1. The positions (phases) of 71a and 71a are aligned. Thus, the second cam member 62 is pressed against the side plate 23 a by the first cam member 61.

  The other end surface 62d of the main body 62a is slidably in contact with the inner surface of the side plate 23a. The protruding piece portion 62b protrudes from the other end surface 62d of the main body 62a and is inserted through the vertically long insertion hole 23d of the side plate 23a of the upper fixing bracket 23. The protruding piece 62b is inserted into the vertically long insertion hole 23d. The projecting piece 62b has a polygonal outer peripheral surface and is slidably in contact with the peripheral surface of the vertically long insertion hole 23d. Thereby, the rotation of the second cam member 62 around the second support shaft 51 is restricted.

  The third cam member 63 is disposed between the first cam member 61 and the left side plate 30 a of the upper column bracket 30. The third cam member 63 is formed in a cylindrical shape, and is fitted to the outer peripheral surface of the second support shaft 51 via the bush 65 so as to be relatively rotatable. Note that the bush 65 may be eliminated, and the third cam member 63 may be fitted to the second support shaft 51 without the bush 65 interposed therebetween.

  The third cam member 63 includes a main body 63a and a protruding piece 63b that protrudes rightward from the main body 63a. The main body 63 a is formed in a columnar shape and has one end surface 63 c that faces the other end surface 61 b of the first cam member 61. A convex portion 73 is formed on the one end surface 63c. The number of convex portions 73 is the same as the number of convex portions 71a of the first cam member 61 (two in the present embodiment).

The convex parts 73 and 73 are arrange | positioned at equal intervals in the circumferential direction C1. Each convex part 73, 73 protrudes toward the first cam member 61. Each convex part 73, 73 has a width of about several degrees with respect to the circumferential direction C1. Both end portions of the convex portions 73 and 73 in the circumferential direction C1 are formed in a tapered shape that smoothly inclines from the one end surface 63c.
When the first cam member 61 is in the tilt / telescopic lock position, the positions of the convex portions 73 and 73 of the third cam member 63 are the positions (phases) of the convex portions 71b and 71b of the first cam member 61 with respect to the circumferential direction C1. And it is aligned. Accordingly, the third cam member 63 is pressed against the side plate 30 a by the first cam member 61. The other end surface 63d of the main body 63a is slidably in contact with the outer surface of the left side plate 30a.

  4 and 6, the protruding piece 63b protrudes from the other end surface 63d of the main body 63a and passes through the horizontally long insertion hole 30c of the left side plate 30a of the upper column bracket 30. The protruding piece 63b has an outer peripheral surface formed in a polygonal shape, and is slidably in contact with the peripheral surface of the horizontally long insertion hole 30c. Thereby, the rotation of the third cam member 63 around the second support shaft 51 is restricted.

Referring to FIG. 6, the pressing member 53 is disposed between the left side plates 30 a and 30 b of the upper column bracket 30. The pressing member 53 is provided to restrict the movement of the upper jacket 16 in the telescopic direction Y1 by pressing the upper jacket 16 against the lower jacket 17.
8 is a cross-sectional view taken along line VIII-VIII in FIG. Referring to FIGS. 6 and 8, the pressing member 53 is an integrally molded product formed using a synthetic resin or the like, and includes a cylindrical portion 53 a connected to the second support shaft 51 so as to be integrally rotatable, and a cylinder. And a protruding portion 53b protruding from the shape portion 53a.

  The protrusion 53b is formed in an arc shape when viewed from the side. The protrusion 53b is inserted through a notch 16a formed at the lower end of the upper jacket 16 and extending along the telescopic direction Y1. An outer peripheral surface of the protruding portion 53b is a pressing portion 53c. The pressing portion 53 c faces the lower end surface 17 a of the lower jacket 17. When the first cam member 61 is in the tilt / telescopic lock position, the pressing portion 53c is in contact with the lower end surface 17a. Thereby, the pressing member 53 presses the lower jacket 17 and the upper jacket 16. As a result, the upper jacket 16 is frictionally engaged with the lower jacket 17.

  The second support shaft 51 and the pressing member 53 are rotated by a second electric motor 75. Specifically, an operation mechanism 74 is disposed adjacent to the left side plate 23 a of the upper fixing bracket 23. The operation mechanism 74 includes a second electric motor 75, a transmission mechanism 76 that transmits the power of the second electric motor 75 to the second support shaft 51, and a support member 77 that supports the second electric motor 75. .

The second electric motor 75 is connected to a control unit (not shown) and is controlled by this control unit.
The transmission mechanism 76 is a deceleration mechanism that decelerates and outputs the output rotation of the second electric motor 75. The transmission mechanism 76 includes a small gear 78 coupled to the output shaft 75a of the second electric motor 75 so as to be integrally rotatable, and a large gear meshed with the small gear 78 and coupled to the left end portion of the second support shaft 51 so as to be integrally rotatable. A gear 79 is included.

  The support member 77 is a plate-like member, for example. The support member 77 is supported by the second support shaft 51 and supports the motor housing 75 b of the second electric motor 75. The motor housing 75b of the second electric motor 75 is inserted through the vertically long insertion hole 23d of the side plate 23a. Accordingly, as the second support shaft 51 is displaced in the tilt direction X1, the second electric motor 75 and the transmission mechanism 76 are displaced in the tilt direction X1.

With the above configuration, the output shaft 75 a of the second electric motor 75 is transmitted to the second support shaft 51 via the transmission mechanism 76. As a result, the second support shaft 51, the first cam member 61, and the pressing member 53 rotate around the central axis L <b> 1 of the second support shaft 51.
Next, main operations of the position adjustment type steering apparatus 1 will be described. Specifically, (1) tilt and telescopic lock for fixing the position of the upper jacket 16 (steering wheel 2), (2) tilt adjustment for adjusting the position of the upper jacket 16 in the tilt direction X1, and (3) the upper jacket The telescopic adjustment for adjusting the position 16 in the telescopic direction Y1 will be described.

  First, (1) tilt / telescopic lock will be described. As shown in FIG. 3, when the first cam member 61 is positioned at the tilt / telescopic lock position, the respective convex portions 71 a and 71 a of the first cam member 61 correspond to the corresponding convex portions 72 a of the second cam member 62. , 72a. Accordingly, the second cam member 62 is pressed against the left side plate 23 a of the upper fixing bracket 23. The force due to this pressing acts as a first regulating force F1 between the second cam member 62 and the left side plate 23a. The first restriction force F1 causes a frictional resistance between the other end surface 62d of the main body 62a of the second cam member 62 and the inner surface of the left side plate 23a. Thereby, the movement of the second support shaft 51, the upper column bracket 30, and the upper jacket 16 in the tilt direction X1 is restricted.

  Further, when the first cam member 61 is positioned at the tilt / telescopic lock position, the convex portions 71 b and 71 b of the first cam member 61 abut against the corresponding convex portions 73 and 73 of the third cam member 63. ing. As a result, the third cam member 63 is pressed against the left side plate 30 a of the upper column bracket 30. The force due to this pressing acts as a second regulating force F21 between the third cam member 63 and the left side plate 30a. The second restriction force F21 causes a frictional resistance between the other end surface 63d of the main body 63a of the third cam member 63 and the outer surface of the left side plate 30a. Thereby, the movement of the upper column bracket 30 and the upper jacket 16 in the telescopic direction Y1 is restricted. That is, the relative rotational force between the first cam member 61 and the third cam member 63 is a force that presses the third cam member 63 against the left side plate 30a.

  At this time, the pressing portion 53 c of the pressing member 53 presses the lower end surface 17 a of the lower jacket 17 upward. The force due to this pressing acts between the upper jacket 16 and the lower jacket 17 as the second regulating force F22. Due to the second regulating force F <b> 22, a frictional resistance is generated between the inner peripheral surface of the upper jacket 16 and the outer peripheral surface of the lower jacket 17. Thereby, the movement of the upper column bracket 30 and the upper jacket 16 in the telescopic direction Y1 is restricted.

That is, in the tilt / telescopic lock state, the movement of the upper jacket 16 in the telescopic direction Y1 is restricted by the frictional resistance based on the second restriction force F21 and the second restriction force F22. In the tilt / telescopic lock state, the upper jacket 16 is restricted from moving in both the tilt direction X1 and the telescopic direction Y1.
Next, (2) tilt adjustment will be described. In order to perform the tilt adjustment, first, the second electric motor 75 is driven to rotate the second support shaft 51. As a result, the first cam member 61 is rotated, for example, 60 degrees from the tilt / telescopic lock position to one C11 in the circumferential direction C1. Thereby, as shown in FIG. 9A, the first cam member 61 is displaced to the tilt adjustment position. At this time, the connection between the convex portions 71a and 71a of the first cam member 61 and the corresponding convex portions 72a and 72a of the second cam member 62 is released. That is, the convex portions 71 a and 71 a of the first cam member 61 enter between the convex portions 72 a and 72 a of the second cam member 62. Thereby, the press of the 2nd cam member 62 to the left side board 23a by the 1st cam member 61 is cancelled | released, and the 1st control force F1 does not act. As a result, the second support shaft 51, the upper column bracket 30, and the upper jacket 16 can move in the tilt direction X1.

  At this time, the projections 71 b and 71 b of the first cam member 61 are released from the corresponding projections 73 and 73 of the third cam member 63. That is, the convex portions 71 b and 71 b of the first cam member 61 enter between the convex portions 73 and 73 of the third cam member 63. Thereby, the press of the 3rd cam member 63 to the left side board 30a by the 1st cam member 61 is cancelled | released, and the 2nd control force F21 does not act.

  However, as shown in FIGS. 9A and 9B, the pressing portion 53c of the pressing member 53 is pressed against the lower end surface 17a of the lower jacket 17 even when the first cam member 61 is in the tilt adjustment position. The maintained state is maintained, and the state in which the second regulating force F22 is applied is maintained. Accordingly, the upper jacket 16 is in a tilt movable / telescopic lock state in which the upper jacket 16 can move in the tilt direction X1 but cannot move in the telescopic direction Y1.

In this state, as shown in FIG. 10A, which is a schematic diagram of the main part, when the first electric motor 33 is driven, the worm shaft 41 and the worm wheel 42 rotate, and the pinion 43 is attached to the rack 44 accordingly. Rotate against.
Thereby, the rack 44 and the connection part 45 are displaced to one side (for example, upward) of the tilt direction X1, as shown to FIG. 10 (B). Accordingly, the upper column bracket 30, the upper jacket 16, the steering shaft 3, the steering wheel 2, and the like are displaced around the tilt center axis 29 in the tilt direction X1, and tilt adjustment is performed.

Next, (3) telescopic adjustment will be described. With reference to FIG. 9A, in order to perform telescopic adjustment, first, the second electric motor 75 is driven to rotate the second support shaft 51. Accordingly, the first cam member 61 is rotated, for example, 60 degrees from the tilt adjustment position to one side C11 in the circumferential direction C1.
As a result, as shown in FIG. 11A, the first cam member 61 is displaced to the telescopic adjustment position. At this time, the convex portions 71 a and 71 a of the first cam member 61 abut on the corresponding convex portions 72 b and 72 b of the second cam member 62. As a result, the second cam member 62 is pressed again against the left side plate 23 a of the upper fixing bracket 23. The force due to the pressing acts as a first regulating force F1 between the second cam member 62 and the left side plate 23a. As a result, the movement of the second support shaft 51, the upper column bracket 30, and the upper jacket 16 in the tilt direction X1 is restricted as described above.

  On the other hand, the coupling between the convex portions 71b and 71b of the first cam member 61 and the corresponding convex portions 73 and 73 of the third cam member 63 remains released. Furthermore, as shown in FIGS. 11A and 11B, the pressing of the pressing portion 53c of the pressing member 53 and the lower end surface 17a of the lower jacket 17 is released, and the second regulating force F22 does not act. ing. Accordingly, the upper jacket 16 is in a telescopic movable / tilt locked state in which the upper jacket 16 can move in the telescopic direction Y1 but cannot move in the tilt direction X1.

  At this time, as shown in FIG. 12A, which is a schematic diagram of the main part, the movement of the connecting part 45 in the tilt direction X1 is restricted, so that the pinion 43 and the worm wheel 42 cannot rotate. Yes. When the first electric motor 33 is driven in this state, the worm shaft 41 rotates, but the worm wheel 42 does not rotate and moves along the telescopic direction Y1. Thereby, the worm wheel 42, the pinion 43, and the connection part 45 linearly move to one side (for example, the front) of the telescopic direction Y1, as shown in FIG. 12 (B).

Accordingly, the upper column bracket 30, the upper jacket 16, the upper shaft 11, the steering wheel 2, and the like are displaced in the telescopic direction Y1, and telescopic adjustment is performed.
When the tilt adjustment and telescopic adjustment described above are finished, the second electric motor 75 is rotated in the other direction C12 in the circumferential direction C1, as shown in FIG. As a result, the first cam member 61 and the pressing member 53 are returned to the tilt / telescopic lock position.

  As described above, according to the present embodiment, when the first cam member 61 is located at the tilt / telescopic lock position, the second cam member 62 generates the first regulating force F1, and The third cam member 63 and the pressing member 53 of the third member 83 generate the second restriction forces F21 and F22. Thereby, the tilt / telescopic lock in which the upper jacket 16 is restricted from moving in the tilt direction X1 and the telescopic direction Y1 can be realized.

Further, when the first cam member 61 is located at the tilt adjustment position, the second cam member 62 does not generate the first regulating force F1, and the upper jacket 16 can move in the tilt direction X1. On the other hand, the pressing member 53 of the third member 83 generates the second regulating force F22, and the upper jacket 16 is not movable in the telescopic direction Y1.
In this state, when the worm shaft 41 is rotated by the first electric motor 33, the worm wheel 42 and the pinions 43, 43 are rotated. As a result, the racks 44 and 44 meshing with the pinions 43 and 43 are displaced in the tilt direction X1, and as a result, the upper jacket 16 is displaced in the tilt direction X1 together with the racks 44 and 44. Thereby, tilt adjustment is possible.

  Further, when the first cam member 61 is in the telescopic adjustment position, the second cam member 62 generates the first restricting force F1, and the upper jacket 16 cannot move in the tilt direction X1. At this time, the third cam member 63 and the pressing member 53 do not generate the second restricting forces F21 and F22, and the upper jacket 16 is movable in the telescopic direction Y1.

  At this time, the upper jacket and the racks 44, 44 cannot be displaced in the tilt direction X1, and the rotation of the pinions 43, 43 meshing with the racks 44, 44 and the worm wheel 42 connected to the pinions 43, 43 Rotation is regulated. When the worm shaft 41 is rotated by the first electric motor 33 in this state, the worm wheel 42 is displaced in the axial direction of the worm shaft 41 (telescopic direction Y1) without rotating. Thereby, each pinion 43 and 43, each rack 44 and 44, the upper bracket 30, and the upper jacket 16 are also displaced in the telescopic direction Y1. Thereby, telescopic adjustment is possible.

  As described above, the upper jacket 16 can be displaced in the tilt direction X1 and the telescopic direction Y1 by one of the first electric motors 33. Further, the two electric motors of the first electric motor 33 and the second electric motor 75 are used to fix the position of the upper jacket 16 (steering wheel 2) in the displacement directions X1 and Y1, adjust the tilt of the upper jacket 16, and the upper. The telescopic adjustment of the jacket 16 can be performed.

  In addition, during the telescopic adjustment, the upper jacket 16 and the racks 44 and 44 are restricted from moving in the tilt direction X1. Accordingly, the rotation of the pinions 43 and 43 meshing with the racks 44 and 44 and the worm wheel 42 connected to the pinions 43 and 43 are restricted. Therefore, a dedicated member for restricting the rotation of the worm wheel 42 at the time of telescopic adjustment is unnecessary, and the number of parts can be further reduced.

Moreover, the 1st cam member 61 can be displaced to each position by the simple structure of rotating the 2nd spindle 51 around the central axis L1. As a result, the number of parts of the position adjustment type steering device 1 can be further reduced.
Further, when the first cam member 61 is displaced to the tilt / telescopic lock position or the telescopic adjustment position, the second cam member 62 generates a force for rotating the first cam member 61 and the second cam member 62 relative to each other. This can be converted into a force for pressing the left side plate 23a of the fixing bracket 23. Accordingly, the first restricting force F1 can be generated by the second cam member 62 with a simple configuration in which the first cam member 61 and the second cam member 62 are relatively rotated. Therefore, the configuration for generating the first regulating force F1 can be simplified, and the number of components of the position adjustment type steering device 1 can be further reduced.

Further, at the time of tilt adjustment, the pressing member 53 presses the upper jacket 16 and the lower jacket 17 so that the second regulating force F22 can be generated. Thereby, it is possible to suppress the upper jacket 16 from being carelessly displaced in the telescopic direction Y1 during tilt adjustment.
Further, when the first cam member 61 is displaced to the tilt / telescopic lock position or the tilt adjustment position, the third cam member 63 generates a force that causes the first cam member 61 and the third cam member 63 to rotate relative to each other. This can be converted into a force for pressing the left side plate 30a of the column bracket 30. Thereby, the 2nd control force F22 can be produced with the 3rd cam member 63 by the simple structure of rotating the 1st cam member 61 and the 3rd cam member 63 relatively. Therefore, the configuration for generating the second regulating force F22 can be simplified, and the number of parts of the position-adjustable steering device 1 can be further reduced.

In addition, cam mechanisms 52L and 52R are disposed on the left and right sides of the upper jacket 16. Thereby, the coupling | bonding aspect of the upper jacket 16 and the upper fixing bracket 23 can be made the same with the left side of the upper jacket 16, and the right side. Thereby, the upper jacket 16 can be supported with good balance in the left-right direction RL.
Further, the state in which the upper jacket 16 is tilted and telescopically locked, the state in which tilt adjustment is possible, and the state in which telescopic adjustment is possible can be switched by driving the second electric motor 75. Further, the first electric motor 33 can displace the upper jacket 16 in the tilt direction X1 and the telescopic direction Y1. Thus, only two electric motors are required for locking and position adjustment of the upper jacket 16, and the number of electric motors can be reduced.

  Thus, since the number of electric motors can be reduced, it is possible to further reduce the component cost, weight, and assembling work of the position-adjustable steering apparatus 1. Further, since the number of electric motors is small, the position adjustment type steering device 1 can be further downsized. By downsizing the position-adjustable steering device 1, a space for the driver in the steering wheel 2 can be increased. Therefore, a more comfortable space for the driver can be provided in the vehicle.

  In addition, switching between the tilt / telescopic lock state, the tilt adjustment state, and the telescopic adjustment state is realized by driving the second electric motor 75. Therefore, there is no need for a dedicated changeover switch for switching between the tilt adjustment state and the telescopic adjustment state. Thereby, the component cost of the position adjustment type steering device 1, weight, the effort of an assembly, and arrangement space can be reduced more.

  When the vehicle is powered off, the upper jacket 16 (the steering wheel 2) is moved to the upper end in the tilt direction X1 and the front end in the telescopic direction Y1 by the operation of the first and second electric motors 33 and 75. You may make it position. In this case, when the driver is seated in the driver's seat and the vehicle is turned on (ignition on), the first and second electric motors 33 and 75 are operated. As a result, the upper jacket 16 is moved in the tilt direction X1 and the telescopic direction Y1 by a predetermined amount.

As a result, the steering wheel 2 does not get in the way when the driver gets on and off the vehicle. In addition, when the driver is seated in the driver's seat, the steering wheel 2 can be automatically placed at a previously stored position. Thereby, the convenience regarding getting on and off of a driver | operator's vehicle can be made higher.
The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.

  For example, in the above embodiment, when the first cam member 61 is in the tilt adjustment position, the pressing of the upper column bracket 30 (upper jacket 16) by the third cam member 63 is released. Not. When the first cam member 61 is in the tilt adjustment position, the displacement of the upper jacket 16 in the telescopic direction Y1 may be regulated by pressing the upper column bracket 30 with the third cam member 63.

  Moreover, in the said embodiment, although the 2nd spindle 51 was rotated by the 2nd electric motor 75, it is not limited to this. For example, instead of the second electric motor 75, an operation member such as a lever that can be operated by the driver may be provided. In this case, the operation member is rotatably connected to the second support shaft 51. Accordingly, the driver can rotate the first cam member 61 about the central axis L1 by rotating the operation member about the central axis L1. Thereby, the 2nd electric motor 75 becomes unnecessary and can reduce the number of electric motors.

  Further, the vertically long insertion holes 23d and 23e are formed in the side plates 23a and 23b of the upper fixing bracket 23, and the horizontally long insertion holes 30c and 30d are formed in the left side plates 30a and 30b of the upper column bracket 30, but the present invention is not limited thereto. Not. For example, the horizontally long insertion holes 30c and 30d may be formed in the side plates 23a and 23b of the upper fixing bracket 23, and the vertically long insertion holes 23d and 23e may be formed in the left side plates 30a and 30b of the upper column bracket 30. In this case, the second cam member 62 is inserted through the vertically long insertion holes 23d and 23e, and the third cam member 63 is inserted through the horizontally long insertion holes 30c and 30d.

In the above embodiment, the first cam member 61, the second cam member 62, and the third cam member 63 are used to realize the tilt / telescopic lock state, the tilt adjustment state, and the telescopic adjustment state. It is not limited to this.
In addition to the cam member, a first member that rotates integrally with the second support shaft 51 is provided, and the first member and the second member are engaged according to the position in the circumferential direction C1 of the first member, and the first member The one member and the third member are engaged to realize the tilt / telescopic lock state, the tilt adjustment state, and the telescopic adjustment state.

DESCRIPTION OF SYMBOLS 1 ... Position adjustment type steering device, 2 ... Steering member, 3 ... Steering shaft, 13, 14 ... Car body side member (vehicle body), 16 ... Upper jacket (movable jacket), 17 ... Lower jacket (jacket), 23 ... Upper fixed Brackets (fixing members), 23a, 23b ... side plates (one side plate) of the upper fixing bracket, 23d, 23e ... vertically long insertion holes (insertion holes extending along the tilt direction), 29 ... tilt central axis, 30a, 30b ... upper Side plate (the other side plate) of the column bracket, 30c, 30d ... Horizontally long insertion holes (insertion holes extending along the telescopic direction), 31 ... Position adjusting mechanism, 33 ... First electric motor (electric motor), 41 ... Worm shaft, 42 ... Worm wheel, 43 ... Pinion, 44 ... Rack, 45 ... Connection (connection member), 50 ... Tilt / Tele Colloc mechanism 51 ... second support shaft (support shaft) 53 ... pressing member (part of third member) 61 ... first cam member (first member) 62 ... second cam member (second member) 63 ... third cam member (part of the third member), 75 ... second electric motor, 83 ... third member, F1 ... first regulating force, F21, F22 ... second regulating force, L1 ... center axis, S1: axial direction, X1: tilt direction, Y1: telescopic direction.

Claims (6)

A position having a tilt adjustment function for adjusting the position of the steering member in a tilt direction around a predetermined tilt center axis, and a telescopic adjustment function for adjusting the position of the steering member in a telescopic direction along the axial direction of the steering shaft In the adjustable steering device,
A movable jacket that rotatably supports the steering shaft and moves together with the steering member during tilt adjustment and telescopic adjustment;
A tilt / telescopic lock mechanism that releasably locks the movable jacket with respect to a fixed member fixed to the vehicle body;
A position adjusting mechanism for driving the movable jacket in the tilt direction and the telescopic direction,
The tilt / telescopic lock mechanism includes a first member that can be displaced around a predetermined center axis to a predetermined tilt / telescopic lock position, a tilt adjustment position, and a telescopic adjustment position, and the first member is the tilt / telescopic lock position. And a second member that generates a first restricting force for restricting movement of the movable jacket in the tilt direction when the telescopic adjustment position is located, and the first member is in the tilt / telescopic lock position. And a third member that generates a second restricting force for restricting movement of the movable jacket in the telescopic direction when positioned at the tilt adjustment position,
The position adjusting mechanism includes an electric motor, a worm shaft connected to the electric motor and extending in the telescopic direction, a worm wheel meshing with the worm shaft, a pinion rotating in conjunction with the worm wheel, and meshing with the pinion A position-adjustable steering apparatus comprising: a rack extending along the tilt direction; and a connecting member that connects the rack and the movable jacket so as to be able to move together. In Claim 1, each of the fixed member and the movable jacket is provided with a side plate,
One side plate is formed with an insertion hole extending along the tilt direction,
The other side plate is formed with an insertion hole extending along the telescopic direction,
The tilt and telescopic lock mechanism includes a support shaft that passes through each insertion hole,
The position-adjustable steering apparatus, wherein the first member is supported by the support shaft so as to be rotatable integrally, and the second member and the third member are supported by the support shaft so as to be relatively rotatable. . In Claim 2, the 1st member contains the 1st cam member,
The second member includes a second cam member disposed between the first cam member and the one side plate,
The position-adjustable steering apparatus according to claim 1, wherein the second cam member is pressed against the one side plate by the relative rotation of the first cam member and the second cam member, and the first restricting force is generated. The jacket according to claim 2 or 3, further comprising a jacket that is supported by the vehicle body so that movement in the telescopic direction is restricted, and is fitted to the movable jacket.
The position-adjustable steering apparatus, wherein the third member includes a pressing member that is coupled to the support shaft so as to rotate integrally with the support shaft and that generates the second regulating force by pressing the movable jacket and the jacket. . In Claim 2, 3 or 4, the 1st member contains the 1st cam member,
The third member includes a third cam member disposed between the first cam member and the other side plate,
The position-adjustable steering apparatus according to claim 1, wherein the third cam member is pressed against the other side plate by the relative rotation between the first cam member and the third cam member, and the second restricting force is generated. 6. The position-adjustable steering apparatus according to claim 1, further comprising a second electric motor for rotating the first member around the central axis.

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