JP2009096408A - Electric telescopic steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an axial line of a telescopic screw screwed in a nut member parallel to an axial line of a steering shaft. <P>SOLUTION: A bracket 45 for supporting a motor case 48 to an upper jacket 3b comprises a first bracket 50 formed with a first attaching surface 50a roughly parallel to the upper jacket 3b by being welded to the upper jacket 3b, and a second bracket 49 attached to the first attaching surface 50a through two bolts 51 to be jointed to relatively move along a first oval hole 49c long in the X-axis direction in a roughly right angle to a shaft core of the upper jacket 3b, formed with a second attaching surface 49d in a roughly right angle to the first attaching surface 50a. In the second bracket 49, the motor case 48 is attached through one bolt 52 to relatively move along a second oval hole 49e long in the Y-axis direction in a roughly right angle to the shaft core of the upper jacket 3b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric telescopic steering device that can adjust the centering of a telescopic screw.

  An electric telescopic steering device that operates a telescopic mechanism with an electric motor is used in a vehicle.

  As a conventional electric telescopic steering device, for example, the one described in Patent Document 1 is known. This device is provided with a telescopic mechanism for performing telescopic adjustment by changing the position of the steering wheel provided in the upper part of the steering column in the longitudinal direction of the vehicle body.

  The telescopic mechanism is configured as follows. In other words, the upper shaft is provided so as to be slidable in the axial direction with respect to the lower shaft, and a lower jacket for rotatably supporting the lower shaft and an upper jacket for rotatably supporting the upper shaft are provided. On the other hand, a telescopic screw substantially parallel to the upper jacket is rotatably supported on the upper jacket via a bracket and a shaft support portion, and one end of the telescopic screw is screwed into the nut member, and the other end is The motor is connected. By rotating the motor, the upper jacket to which the motor is attached moves relative to the lower jacket in the axial direction, and telescopic adjustment is performed.

  However, if the axis of the telescopic screw screwed into the nut member and the axis of the steering shaft are not parallel to each other, the telescopic screw cannot be rotated due to twisting, and the telescopic adjustment is not smoothly performed.

In order to solve this problem, a configuration in which an elastic member is interposed between a nut member and a lower jacket as disclosed in Patent Document 2 is disclosed. When such a configuration is adopted, even if the axis and the axis are not parallel, telescopic adjustment is performed without causing twisting due to bending of the elastic member.
JP 2007-83992 A Japanese Utility Model Publication No. 5-76947

  However, there is a limit to the amount by which the elastic body bends, and it may not be possible to absorb the deviation in parallelism between the axis and the axis. Further, when the amount of flexure of the elastic body is large, play occurs.

  Therefore, an object of the present invention is to provide an electric telescopic steering device that solves the above-described problems.

  According to the first aspect of the present invention, an upper shaft is slidably provided in the axial direction with respect to the lower shaft, and a lower jacket that rotatably supports the lower shaft and an upper jacket that rotatably supports the upper shaft are provided. A fixed nut member is fixed to the lower jacket, one end is screwed into the fixed nut member, and a telescopic screw substantially parallel to the axis of the upper jacket is provided, and the other end of the telescopic screw is connected to a shaft support portion and In an electric telescopic steering device that is rotatably supported by the upper jacket via a bracket and a motor is connected to the other end of the telescopic screw, the bracket is coupled to the upper jacket and is substantially parallel to the upper jacket. A first bracket formed with a first mounting surface; A second attachment that is attached to one attachment surface and is relatively movable and adjustable along a first long hole extending in the X-axis direction substantially perpendicular to the axis of the upper jacket and substantially perpendicular to the first attachment surface. The second bracket is provided with a mounting surface, and the second bracket is relatively movable and adjustable along a second long hole extending in the Y-axis direction substantially perpendicular to the axis of the upper jacket. The shaft support portion is coupled.

  According to the present invention, at the time of assembling the electric telescopic steering device, it is necessary to perform alignment in advance so that the axis of the telescopic screw screwed into the fixed nut member and the axis of the steering shaft are parallel to each other. Axis alignment is performed as follows. First, by lightly tightening the coupling portion of the second bracket to the first bracket and the coupling portion of the shaft support portion to the second bracket, and then screwing the telescopic screw into the fixing nut member by rotating the motor Move the motor closer to the fixed nut member. In this state, the coupling portion of the second bracket to the first bracket and the coupling portion of the shaft support portion to the second bracket are finally tightened. Thereby, since the alignment of the axes is completed, the telescopic adjustment can be performed smoothly without causing twisting.

  According to a second aspect of the present invention, in the electric telescopic steering device according to the first aspect, the first long hole and the second long hole are formed in the second bracket.

  According to the present invention, since the long holes are collectively formed in the second bracket that is small and easy to handle, the processing is easy and the workability is good.

  The invention according to claim 3 is the electric telescopic steering device according to claim 1 or 2, wherein the shaft support portion is rotatably coupled to the second bracket via a single bolt. Features.

  According to this invention, since the shaft support portion is rotatably coupled to the second bracket by the single bolt, the mounting operation of the shaft support portion and the alignment operation of the axis of the telescopic screw and the axis of the steering shaft are performed. Easy.

  According to the electric telescopic steering apparatus of the first aspect, the bracket is attached to the first mounting surface and is attached to the first mounting surface, the first bracket being coupled to the upper jacket to form a first mounting surface substantially parallel to the upper jacket. A second bracket that is coupled so as to be relatively movable along a first long hole that is long in the X-axis direction substantially perpendicular to the axis of the jacket and has a second attachment surface that is substantially perpendicular to the first attachment surface; The shaft support portion is coupled to the second bracket so as to be relatively movable and adjustable along the second long hole extending in the Y-axis direction substantially perpendicular to the axis of the upper jacket. When assembling the steering device, the axes of the telescopic screw screwed into the fixing nut member and the axis of the steering shaft should be aligned in advance. Easier, by parallel and the axes of the steering shaft of the telescopic screw, twisted and prevented a situation in which the telescopic screw can not be rotated by the results, it is possible to perform telescopic adjustment smoothly.

  According to the electric telescopic steering device of the second aspect, since the first elongated hole and the second elongated hole are formed in the second bracket, the elongated holes are collectively formed in the second bracket that is small and easy to handle. Therefore, processing is easy and workability is good.

  According to the electric telescopic steering device of the third aspect, since the shaft support portion is rotatably coupled to the second bracket via the single bolt, the mounting operation of the shaft support portion and the telescopic screw Axis alignment work between the axis and the axis of the steering shaft is easy.

  Hereinafter, an electric tilt and telescopic steering apparatus as an embodiment of an electric telescopic steering apparatus according to the present invention will be described.

  As shown in FIG. 5, the steering shaft 2 is rotatably supported inside the jacket 3 to constitute a steering column 1, and a steering wheel (not shown) is provided at the right end of the steering shaft 2. The steering shaft 2 includes a lower shaft 2a and an upper shaft 2b that is slidable in the axial direction with respect to the lower shaft 2a via a spline coupling portion 15. On the other hand, the jacket 3 includes a lower jacket 3a that rotatably supports the lower shaft 2a, and an upper jacket 3b that rotatably supports the upper shaft 2b.

  A bearing 16 is provided inside the front end of the lower jacket 3a to support the lower shaft 2a, a push nut 16a that restricts the bearing 16 from being removed from the lower jacket 3a, and a restriction that the bearing 16 is detached from the lower shaft 2a. And a lock nut 16b. Further, in order to support the upper shaft 2b, a bearing 62 and a bearing 17 are provided inside the front and rear of the upper jacket 3b, and a C-ring 17a for restricting the bearing 17 from coming off from the upper shaft 2b is provided.

  Guide means for guiding the upper jacket 3b so as to slide linearly in the axial direction with respect to the lower jacket 3a is provided. Two holes are formed in the upper surface of the upper jacket 3b in the axial direction, and a seat jacket 57 is inserted through the spacer jacket 56 into the hole. An adjustment screw 59 that passes through the central portion of the leaf spring 58 that biases the seat jacket 57 downward is screwed into the lower jacket 3a. The tip of the adjustment screw 59 is inserted into a long hole 60 formed in the upper jacket 3b. On the outside of the two seat jackets 57 in the axial direction, bushes 61 are respectively provided at portions where the lower jacket 3a and the upper jacket 3b slide. A panel 18 for attaching a combination switch or the like is coupled to the rear side of the upper jacket 3b.

  Key lock means for locking the lower shaft 2a is provided at the lower portion of the lower shaft 2a, and an insertion hole 3i for inserting a locking convex portion (not shown) from below in FIG. 5 is formed in the lower jacket 3a. At a position corresponding to the insertion hole 3 i, a lock collar 64 is attached to the lower shaft 2 a via a spring slip 63. As shown in FIG. 4, a concave portion 64 a that locks the rotation of the lock collar 64 by fitting the convex portion for locking is formed on the outer peripheral surface of the lock collar 64.

  A bearing portion 3d is formed on the upper surface side of the lower portion of the lower jacket 3a. A long elongated hole 3e is formed in the bearing portion 3d along the length direction of the jacket 3, and is inserted into the elongated hole 3e so as to pass through the vehicle body. The jacket 3 is supported so as to be swingable in the vertical direction via a first swing shaft 4 that is long in the left-right direction.

  A tilt mechanism 19 for adjusting the tilt of the jacket 3 whose lower end is swingably supported in this way is provided on the upper side of the lower jacket 3a. The configuration of the tilt mechanism 19 will be described below. As shown in FIG. 4, a substantially U-shaped upper bracket 20 is coupled to the vehicle body. The upper bracket 20 includes left and right attachment portions 20a for coupling to the vehicle body, side bracket portions 20b integrally formed below the respective attachment portions 20a, and a connecting portion 20c for connecting the left and right attachment portions 20a. It is comprised by. The left and right mounting portions 20a are formed with cutout portions 20d that open toward the rear of the vehicle body, and the upper bracket 20 is coupled to the vehicle body via mounting seats 21 fitted into the cutout portions 20d and bolts (not shown). Yes. And in order to absorb the impact energy at the time of a secondary collision, the upper bracket 20 that can be detached from the vehicle body toward the front of the vehicle body due to the presence of the notch portion 20d and the bolt that is screwed into the vehicle body are connected. An impact absorbing member 22 is provided. The impact absorbing member 22 is torn along the cutting line 22a to absorb the impact during the secondary collision.

  A swing arm 6 is disposed between the side bracket portions 20b, and an upper portion of the lower jacket 3a is sandwiched between the swing arms 6. The swing arm 6 is formed by connecting a pair of arm portions 6a via a connecting portion 6b. The swing arm 6 is supported by the upper bracket 20 and the vehicle body so that the upper left of FIG. 6 can rotate freely via the second swing shaft 5, and the swing arm centered on the second swing shaft 5. A lower jacket 3 a is rotatably coupled to the rear side of the vehicle body on the upper side of the swing arm 6, which is one side of the rotational direction 6, via a first rotational shaft 23, a collar 68, and a bush 69. A reciprocating drive mechanism 24 is provided for reciprocating the lower part of the swing arm 6 which is the other side of the swing direction of the swing arm 6 along the length direction of the lower jacket 3a.

  When the swing arm 6 is driven to swing with respect to the upper bracket 20, the first rotation shaft 23 of FIG. 6 rotates with a small radius around the second swing shaft 5 and at the same time, the first rotation shaft 23. It is necessary to rotate around the rocking shaft 4 with a large radius, and in order to absorb the deviation at this time, the disk 26 can be freely rotated via the bush link 25 to the left and right side bracket portions 20b of the upper bracket 20. The swing arm 6 is rotatably supported by the upper bracket 20 via the second swing shaft 5 that is supported and arranged at an eccentric position of the disk 26.

  The configuration of the reciprocating drive mechanism 24 will be described. The lower jacket 3a constituting the jacket 3 is provided with a tilt screw 7 that is hollow at both ends substantially parallel to the lower jacket 3a. The tilt screw 7 is rotatably supported and a motor 8 is mounted on the tilt screw 7. Are connected. A movable nut member 9 is screwed to the tilt screw 7, and a lower portion on the other side in the rotational direction of the swing arm 6 is connected to the movable nut member 9.

  Hereinafter, this part will be described in detail. The right end side of the tilt screw 7 in FIG. 5 is rotatably supported by the shaft support portion 3 c of the lower jacket 3 a via the radial bearing 27. That is, as shown in FIG. 3, a radial bearing 27 is fitted into the shaft support portion 3c of the lower jacket 3a. The fitted radial bearing 27 has a small diameter portion 3f on the inner peripheral side of the lower jacket 3a and a screw portion on the outer peripheral surface. Is held by the shaft support portion 3c of the lower jacket 3a and is formed in the tilt screw 7 at the right end of the tilt screw 7 inserted into the radial bearing 3c. It is regulated in the axial direction via the large diameter portion 7b and the C ring 11 as the axial direction regulating means. Spline internal teeth 7 a are formed on the inner peripheral surface on the left end side of the hollow tilt screw 7.

  On the other hand, a motor case 14 is coupled to the lower part of the middle part of the lower jacket 3a. The motor case 14 accommodates a motor 8 and a worm and a worm wheel 13 (not shown) as speed reduction means. Spline external teeth 12 a are formed on the shaft portion of the worm wheel 13 to constitute the output rotating shaft 12. The worm wheel 13 is rotatably supported inside the motor case 14 via a bearing bush 10, and in a state where a pair of thrust bearings 30 are arranged on both sides in the axial direction of the worm wheel 13, The worm wheel 13 is held inside the motor case 14 by screwing the bearing retainer 29 having A worm (not shown) is provided on the output shaft of the motor 8, and the motor 8 is coupled to the inside of the motor case 14 with the worm meshed with the worm wheel 13. The motor case 14 is coupled to the lower jacket 3a via a single bolt 31 with the spline external teeth 12a of the output rotating shaft 12 engaged with the spline internal teeth 7a of the tilt screw 7. A reciprocating drive mechanism 24 is configured.

  A movable nut member 9 is screw-coupled to the tilt screw 7 thus configured in a state where the tilt screw 7 is screwed into the movable nut member 9, and the lower portion of the swing arm 6 is connected to the movable nut member 9. Are connected via a link. This part will be described in detail. As shown in FIG. 4, the movable nut member 9 is surrounded by a stopper 33 having one end side and a lower side opened through a protector 32, and a U-shaped link member 34 sandwiching the stopper 33 from both sides is provided. ing. Bolts 36 inserted through the bushes 35 into the holes 32 a, 33 a, 34 a of the protector 32, the stopper 33, and the link member 34 are screwed into the screw holes 9 a on both sides of the movable nut member 9. In order to eliminate play between the tilt screw 7 and the screw-coupled portion of the movable nut member 9, a through hole is formed to connect the lower portion of the movable nut member 9 and the inside into which the tilt screw 7 is screwed. A seat screw 65 and a spring 66 are inserted, and a screw 67 is screwed. Thereby, the seat screw 65 is pressed against the tilt screw 7 by the spring 66, and the state without play is maintained.

  A screw hole 34b is formed in the link member 34 at a position away from the hole 34a along the axial direction. The screw hole 34b has a collar 37 and a bush formed in a hole formed in the lower portion of the swing arm 6. A second rotating shaft 39 is screwed through 38. A portion of the link member 34 between the hole 34a and the screw hole 34b functions as a link portion. The lower part of the swing arm 6 and the movable nut member 9 are connected via the link part of the link member 34. The lower part of the swing arm 6 rotates in a circular arc around the second swing axis. On the other hand, since the movable nut member 9 moves linearly, it is for absorbing the shift in the moving direction of both. In order to stop the movable nut member 9 from moving forward, a cylindrical stopper 40 is provided so as to surround the tilt screw 7, and an end of the stopper 40 is fitted to the inner peripheral surface of the bearing retainer 29. ing.

  Next, as described above, the upper shaft 2b is slidably provided with respect to the lower shaft 2a, and the telescopic mechanism 41 for performing telescopic adjustment by moving the upper shaft 2b in the axial direction with respect to the lower shaft 2a. Is provided. The configuration of the telescopic mechanism 41 will be described below. As shown in FIG. 3, a female screw portion 28a is formed at the center position of the bearing retainer 28 constituting the reciprocating drive mechanism 24 of the tilt mechanism 19, and a fixed nut member 43 fixed to the lower jacket 3a is provided. I also use it. One end of a telescopic screw 44 is screwed into the fixing nut member 43, and the telescopic screw 44 is disposed substantially parallel to the axis of the upper jacket 3b.

  The other end of the telescopic screw 44 is rotatably supported on the lower surface of the upper jacket 3b via a bracket 45 described later. A motor 47 is connected to the other end of the telescopic screw 44 via a worm and a worm wheel 46 (not shown). As shown in FIG. 1, a motor case 48 as a shaft support portion is attached to the upper jacket 3 b via a bracket 45, and a motor 47 is accommodated in the motor case 48. As shown in FIG. 3, the motor case 48 is provided with a telescopic screw 44 rotatably through a bush 53, and a pair of thrust bearings 54 are disposed on both sides of a worm wheel 46 integrated with the telescopic screw 44. The worm wheel 46 is held inside the motor case 48 by screwing the bearing retainer 55 into the motor case 48.

  The configuration of the bracket 45 will be described in detail. The bracket 45 includes a first bracket 50 formed integrally with a lower portion of the panel 18 and a second bracket 49 attached to the first bracket 50. The first bracket 50 is formed in a substantially U shape as shown in FIGS. 5 and 6, and the upper part thereof is welded to the lower surface of the upper jacket 3b. On the lower surface of the first bracket 50, a first mounting surface 50a, which is a horizontal plane substantially parallel to the axis of the upper jacket 3b, is formed. On the other hand, as shown in FIG. 2, the second bracket 49 includes a mounting portion 49a extending horizontally in the left-right direction, and a pair of bearing portions 49f that are integrally formed to project from both sides of the mounting portion 49a toward the front of the vehicle body. It is constituted by. As shown in FIG. 2, the mating surface 49b of the mounting portion 49a that abuts on the first mounting surface 50a is long in the left-right direction of the vehicle body (X-axis direction) substantially perpendicular to the axis of the upper jacket 3b. A first long hole 49c is formed, and the second bracket 49 can be adjusted relative to the upper jacket 3b in the left-right direction of the vehicle body along the first long hole 49c via two bolts 51. Are combined. A pair of second mounting surfaces 49d, which are vertical surfaces substantially perpendicular to the first mounting surfaces 50a, are formed inside the pair of bearing portions 49f of the second bracket 49, and the second mounting surfaces 49d. A pair of mating surfaces 48b that come into contact with each other are formed on both sides of the sandwiched portion 48a protruding from the motor case 48. The second mounting surface 49d is formed with a second long hole 49e which is long in the vertical direction (Y-axis direction) of the vehicle body and is substantially perpendicular to the axis of the upper jacket 3b. It is coupled to the bracket 49 so as to be movable and adjustable relative to the vertical direction of the vehicle body along the second long hole 49e. As described above, the first long hole 49 c and the second long hole 49 e are both formed in the second bracket 49. The motor case 48 is rotatably coupled to the second bracket 49 via a single bolt 52 and a nut 52a.

  Next, the operation of the electric tilt / telescopic steering device will be described.

  First, the operation of the tilt mechanism 19 will be described. When the motor 8 is rotated, the rotational motion is transmitted to the tilt screw 7 via a worm and a worm wheel 13 (not shown), and the movable nut member 9 into which the tilt screw 7 is screwed is parallel to the jacket 3 in either direction. Move to. Then, the lower part of the drive arm 6 connected to the movable nut member 9 via the link member 34 rotates in either direction. Since the front of the vehicle body above the drive arm is swingably provided on the upper bracket 20 via the second swing shaft 5, the drive arm 6 rotates about the second swing shaft 5. Since the upper part of the drive arm 6 and the rear side of the vehicle body are connected to the lower jacket 3a via the first rotation shaft 23, the jacket is centered on the first swing shaft 4 provided at the lower end of the lower jacket 3a. 3 swings up and down. When the motor 8 is stopped when a steering wheel (not shown) moves to a desired height position, the height position of the steering wheel is determined. In FIG. 3, the movable nut member 9 can move to the left until it abuts against the stopper 40, and can move to the right until the stopper 33 abuts against the bearing portion 3C.

  Next, the operation of the telescopic mechanism will be described. When the motor 47 is rotated, the rotational motion is transmitted to the telescopic screw 44 via a worm and a worm wheel 46 (not shown). Then, since the telescopic screw 44 is screwed into the fixed nut member 43 fixed to the lower jacket 3a, the upper jacket 3b moves along the axial direction with respect to the lower jacket 3a. When the motor 47 is stopped when a steering wheel (not shown) moves to a desired position in the vehicle longitudinal direction, the position of the steering wheel in the vehicle longitudinal direction is determined.

  Next, the assembly procedure of the reciprocating drive mechanism 24 will be described with reference to FIG. Before the assembly of this part is started, the motor 8, the worm and the worm wheel 13 (not shown) are assembled in the motor case 14 in advance, and the stopper 40 is fixed to the inner peripheral surface of the bearing retainer 29 for fixing the worm wheel 13. The end is fitted and the motor unit is assembled. First, the radial bearing 27 is mounted on the shaft support portion 3c of the lower jacket 3a. Thereafter, the left end of the tilt screw 7 is inserted into the stopper 40 of the motor unit, and the spline external teeth 12a of the output rotary shaft 12 are engaged with the spline internal teeth 7a of the tilt screw 7. Then, with the entire length of the motor unit and the tilt screw 7 contracted shortly, these are put into a space having a small axial dimension, and the right end of the tilt screw 7 is inserted into the radial bearing 27 attached to the shaft support portion 3c. The motor case 14 is connected to the lower jacket 3 a by a single bolt 31 while preventing the C case 11 from coming off. Thereafter, the bearing retainer 28 is screwed into the shaft support portion 3 c from the opposite side of the radial bearing 27. As a result, only the right end of the tilt screw 7 is rotatably supported in a state where movement in the axial direction is restricted, and the opened left end is in a state of being splined to the output rotating shaft 12.

  According to the present invention, at the time of assembling the electric telescopic steering device, it is necessary to previously perform axial alignment for making the axis of the telescopic screw 44 screwed into the fixed nut member 43 parallel to the axis of the steering shaft 2. . Axis alignment is performed as follows. First, the coupling portion of the second bracket 49 to the first bracket 50 and the coupling portion of the motor case 48 to the second bracket 49 are lightly temporarily tightened, and then the motor 47 is rotated to fix the telescopic screw 44 to the fixing nut. By screwing into the member 43, the motor 47 is brought close to the fixed nut member 43. In this state, the coupling portion of the second bracket 49 to the first bracket 50 and the coupling portion of the motor case 48 to the second bracket 49 are finally tightened. Thereby, since the alignment of the axes is completed, the telescopic adjustment can be performed smoothly without causing twisting.

  According to the present invention, since the long holes are collectively formed in the second bracket 49 that is small and easy to handle, the processing is easy and the workability is good.

  According to the present invention, since the motor case 48 is rotatably coupled to the second bracket 49 by the single bolt 52, the mounting operation of the motor case 48, the axis of the telescopic screw 44 and the axis of the steering shaft 2 are Axis alignment is easy.

  In the present embodiment, the case where the present invention is applied to an electric tilt / telescopic steering apparatus has been described. However, the present invention may be applied to an electric telescopic steering apparatus that does not have a tilt mechanism. In the present embodiment, the first elongated hole and the second elongated hole are formed in the second bracket. However, the first elongated hole is formed in the first bracket, or the second elongated hole is formed in the motor case. Can be combined arbitrarily. Further, two bolts may be used for attaching the motor case to the second bracket. Furthermore, although the first bracket is welded to the upper jacket, it may be bolted.

It is related with the vicinity of a telescopic mechanism, (a) is front sectional drawing, (b) is a bottom view (embodiment). FIG. 2 is a perspective view of an electric tilt / telescopic steering device showing only the vicinity of the tilt mechanism and the telescopic mechanism in an exploded manner (embodiment). Sectional drawing which shows the vicinity of a tilt mechanism and a telescopic mechanism (embodiment). 1 is an exploded perspective view of an electric tilt / telescopic steering device (embodiment). FIG. Sectional drawing of electric tilt and a telescopic steering apparatus (embodiment). The front view of an electric tilt and telescopic steering device (embodiment). FIG. 2 is a plan view of an electric tilt / telescopic steering device (embodiment). FIG. The BB arrow line view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Steering column 2 ... Steering shaft 2a ... Lower shaft 2b ... Upper shaft 3 ... Jacket 3a ... Lower jacket 3b ... Upper jacket 43 ... Fixed nut member 44 ... Telescopic screw 45 ... Bracket 47 ... Motor 48 ... Motor case (shaft support part) )
49 ... 2nd bracket 49c ... 1st long hole 49d ... 2nd attachment surface 49e ... 2nd long hole 50 ... 1st bracket 50a ... 1st attachment surface 51,52 ... bolt

Claims (3)

An upper shaft is provided to be slidable in the axial direction with respect to the lower shaft, and a lower jacket that rotatably supports the lower shaft and an upper jacket that rotatably supports the upper shaft are provided,
A fixed nut member is fixed to the lower jacket, one end of the fixed nut member is screwed into a telescopic screw substantially parallel to the axis of the upper jacket, and the other end of the telescopic screw is connected to the shaft support portion and the bracket. Via an electric telescopic steering device that is rotatably supported by the upper jacket and has a motor connected to the other end of the telescopic screw,
The bracket is coupled to the upper jacket and has a first mounting surface formed with a first mounting surface substantially parallel to the upper jacket, and is attached to the first mounting surface and substantially perpendicular to the axis of the upper jacket. A second bracket that is coupled so as to be relatively adjustable along a first long hole that is long in the X-axis direction and has a second mounting surface that is substantially perpendicular to the first mounting surface;
The shaft support portion is coupled to the second bracket so as to be relatively adjustable along a second long hole that is long in the Y-axis direction substantially perpendicular to the axis of the upper jacket. Electric telescopic steering device. In the electric telescopic steering device according to claim 1,
The electric telescopic steering device, wherein the first long hole and the second long hole are formed in the second bracket. In the electric telescopic steering device according to claim 1 or 2,
The electric telescopic steering apparatus, wherein the shaft support portion is rotatably coupled to the second bracket via a single bolt.

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