JP2005319826A - Electric steering column device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric steering column device compact in structure and simple in assembly. <P>SOLUTION: Connection of a sub assembly 2 to a lower column 13 in which a tilt driving mechanism 4 and a telescopic driving mechanism 5 are integrally assembled can be performed only by screwing bolts 33, 34 after a tilt driving force transmitting projection 45 and a telescopic driving force transmitting projection 55 are pressed into hollow cylindrical sleeves 153, 143 in the direction orthogonal to the direction of the straight motion. The assembly work is simplified, and the manufacturing cost is reduced thereby. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric steering column apparatus, and more particularly to an electric steering column apparatus that can adjust a tilt position and a telescopic position of a steering wheel by an electric motor.

  It is necessary to adjust the tilt position and telescopic position of the steering wheel according to the physique and driving posture of the driver. Increasing use of column devices. As such an electric steering column device, there is an electric steering column device disclosed in Patent Document 1.

  The electric steering column device disclosed in Patent Document 1 is configured by assembling a power transmission mechanism including an electric motor, a speed reduction mechanism, a feed screw mechanism, and a ball stud to a steering column. In order to assemble these power transmission mechanisms to the steering column with high accuracy, jigs are required, but the workability is poor because there is little space for the jigs and tools to assemble each component to the steering column. There is a problem that it is not efficient.

  In addition, since the tilt power transmission mechanism and the telescopic power transmission mechanism are configured as separate units, it takes time to assemble these power transmission mechanisms on the steering column.

International Publication No. WO03 / 078234 Pamphlet

  It is an object of the present invention to provide an electric steering column apparatus that is compact in structure and easy to assemble.

  The above problem is solved by the following means. That is, the first invention is a steering shaft on which a steering wheel is mounted on the rear side of the vehicle body, the steering shaft is rotatably supported, and the tilt position is adjusted with the tilt center axis as a fulcrum. A column that can adjust the telescopic position along the central axis, a single housing, a tilting motor, and the rotation of the tilting motor are output as a linear motion of the tilt driving force transmitting member via a speed reduction mechanism and a feed screw mechanism. A tilt drive mechanism, a telescopic motor, and a telescopic drive mechanism that outputs the rotation of the telescopic motor as a linear motion of a telescopic drive force transmission member via a speed reduction mechanism and a feed screw mechanism, the tilt motor and the tilt drive mechanism , Telescopic motor and telescopic drive mechanism are pre-installed in the housing And subassembly, the subassembly is an electric steering column apparatus is characterized in that assembled on the column.

  A second invention is a lower column, a front side vehicle body mounting bracket for pivotally supporting the lower column so that the lower column can be attached to the vehicle body on the vehicle body front side of the lower column and the tilt position can be adjusted with the tilt center axis as a fulcrum. An upper column that is fitted to the lower column so that the telescopic position can be adjusted in the longitudinal direction of the vehicle body, a steering shaft that is rotatably supported by the upper column and that has a steering wheel mounted on the rear side of the vehicle body, and the rear column side of the lower column The rear body mounting bracket that can be mounted on the vehicle body, a single housing, the tilt motor, and the rotation of the tilt motor are output as a linear motion of the tilt driving force transmission member via the speed reduction mechanism and the feed screw mechanism. Tilt drive mechanism, telescopic motor, rotation of the telescopic motor, deceleration mechanism and feed screw mechanism A telescopic drive mechanism that outputs as a linear motion of the telescopic drive force transmission member, the tilt motor, the tilt drive mechanism, the telescopic motor, and the telescopic drive mechanism are pre-assembled into the housing to form a subassembly. The electric steering column device is assembled to the lower column between the front body mounting bracket and the rear body mounting bracket.

  According to a third aspect of the invention, in the electric steering column apparatus of the first or second aspect of the invention, the tilt drive mechanism and the telescopic drive mechanism are provided with backlash removal that removes backlash of each speed reduction mechanism. An electric steering column device including a mechanism.

  According to a fourth aspect of the present invention, in the electric steering column device according to any one of the first to third aspects of the invention, the center axis of the output shaft of the tilt motor or the telescopic motor is the center axis of the steering shaft. An electric steering column device characterized by being arranged substantially in parallel.

  A fifth aspect of the invention is the electric steering column device according to any one of the first to fourth aspects of the invention, wherein the tilt driving force transmission member and the telescopic driving force transmission member have a spherical shape for transmitting the driving force. The electric steering column apparatus is characterized in that the driving force is transmitted through a cylindrical sleeve in which the spherical protrusion is slidably fitted.

  A sixth aspect of the invention is the electric steering column apparatus according to any one of the first to fifth aspects of the invention, wherein the tilt motor and the telescopic motor are constituted by a single common motor, and the single motor An electric steering column apparatus comprising a switching mechanism for selectively transmitting rotation of a motor to the tilt driving mechanism or the telescopic driving mechanism.

  According to a seventh aspect of the present invention, there is provided a steering shaft on which a steering wheel is mounted on the rear side of the vehicle body, a pivotally supporting the steering shaft, a tilt position adjustment with a tilt central axis as a fulcrum, and a central axis of the steering shaft A column that can adjust the telescopic position along the axis, a single housing, a position adjustment motor, and the rotation of the position adjustment motor is output as a linear motion of the position adjustment drive force transmission member via the speed reduction mechanism and feed screw mechanism. An electric steering column apparatus comprising: a position adjusting drive mechanism configured to be assembled; and the position adjusting motor and the position adjusting drive mechanism are previously assembled in the housing to form a subassembly, and the subassembly is assembled to the column. is there.

  In the electric steering column apparatus of the present invention, it is integrated into a single housing as a sub-assembly that outputs both linear motion for tilt and telescopic via a tilt motor, a telescopic motor, a speed reduction mechanism, and a feed screw mechanism. As a result, the structure becomes compact.

  Further, the connection between the linear motion output portion of the subassembly and the column only needs to be pushed in from the direction perpendicular to the motion direction of the linear motion, so that the assembling work is simplified and the manufacturing cost is reduced.

* 1st Embodiment Hereinafter, embodiment of this invention is described based on drawing. FIG. 1 is a front view including a partial cross section showing an embodiment of a subassembly assembled to the electric steering column apparatus of the present invention, and is a view taken along the line XX of FIG. 2 is a cross-sectional view taken along arrow P in FIG. 1, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a side view including a partially cutaway section of the electric steering column apparatus according to the first embodiment of the present invention. The subassembly shown in FIGS. 1 to 4 is assembled to the tilt type steering column apparatus. Indicates the state.

* Overall Configuration As shown in FIG. 5, the electric steering column apparatus 1 according to the first embodiment of the present invention includes a front vehicle body mounting bracket 12, a lower column (outer column) 13, an upper column (inner column) 14, The rear body mounting bracket 15, the upper steering shaft 16, the steering wheel 17, the subassembly 2, and the like are included.

  An upper plate 122 of the front-side vehicle body mounting bracket 12 is fixed to the front side (left side in FIG. 5) of the vehicle body 11, and a side plate 123 extends downward from the upper plate 122. With the tilt center shaft 121 attached to the side plate 123 as a fulcrum, the front end of the hollow cylindrical lower column 13 is pivotable so that the tilt position can be adjusted (oscillates in a plane parallel to the plane of FIG. 5). It is supported.

  An upper column 14 is fitted on the inner periphery of the lower column 13 so as to be capable of telescopic position adjustment (sliding parallel to the central axis of the lower column 13). An upper steering shaft 16 is pivotally supported on the upper column 14, and a steering wheel 17 is fixed to a vehicle body rear side (right side in FIG. 5) end portion of the upper steering shaft 16.

  A lower steering shaft 18 is pivotally supported on the lower column 13. The lower steering shaft 18 is spline-fitted with the upper steering shaft 16, and the upper steering shaft 16 rotates regardless of the telescopic position of the upper column 14. Is transmitted to the lower steering shaft 18.

  The vehicle body front side (left side in FIG. 5) of the lower steering shaft 18 is connected to a steering gear (not shown) via a universal joint (not shown), and when the driver turns the steering wheel 17 by hand, the upper steering shaft 16 The lower steering shaft 18 can be rotated to change the steering angle of the wheel.

  The L-shaped rear-side vehicle body mounting bracket 15 has an upper plate 151 fixed to the vehicle body 11 in the vicinity of the lower column 13 on the vehicle body rear side (right side in FIG. 5), and downward from the vehicle body rear side of the upper plate 151. The column support plate 152 extends. The column support plate 152 is formed with a not-shown notch window through which the vehicle rear side of the lower column 13 passes, so that the lower column 13 does not interfere with the column support plate 152 when the tilt position of the lower column 13 is adjusted. Yes.

  As shown in FIGS. 1 to 5, the subassembly 2 is attached to the outer periphery of the lower column 13 between the front vehicle body mounting bracket 12 and the rear vehicle body mounting bracket 15. The subassembly 2 includes the tilt drive mechanism 4 for adjusting the tilt position and the telescopic drive mechanism 5 for adjusting the telescopic position in a common housing 3 in advance. The housing 3 is arranged on the outer periphery of the lower column 13. It is installed.

  A rectangular flange 31 extending vertically and a boss portion 32 extending obliquely are formed on the upper portion of the housing 3. The vertical attachment surface 311 of the flange 31 and the oblique attachment surface 321 of the boss portion 32 are in contact with the outer periphery of the lower column 13 to determine the positions, and the bolts 33 and 34 inserted into the bolt holes 312 and 322 are screwed in. The housing 3 is fixed to the lower column 13.

* Tilt Drive Mechanism The tilt drive mechanism 4 includes a tilt motor 41, a speed reduction mechanism 42, a backlash removal mechanism 43, a feed screw mechanism 44, and a tilt drive force transmission protrusion 45 that outputs a linear motion for tilt.

  The tilt motor 41 is fixed to the housing 3 by four bolts 413, and the center axis 412 of the output shaft 411 of the tilt motor 41 is parallel to the center axis of the lower column 13.

  A worm 421 is attached to the output shaft 411 of the tilting motor 41, and the worm wheel 422 and the worm 421, which are attached below the feed screw shaft 441, mesh with each other to transmit the rotation of the output shaft 411 to the feed screw shaft 441. ing. The worm wheel 422 and the worm 421 constitute a speed reduction mechanism 42.

  The feed screw shaft 441 extends perpendicularly to the central axis 412 of the tilt motor 41, and the upper and lower ends thereof are rotatably supported by the housing 3 by bearings 442 and 443. A female screw 446 formed on the inner periphery of the feed nut 445 is screwed to a male screw 444 formed on the outer periphery of the feed screw shaft 441. A feed screw mechanism 44 is configured by the feed screw shaft 441, the feed nut 445, and the bearings 442 and 443.

  A tilt driving force transmission protrusion 45 is integrally formed on the feed nut 445, and the tilt driving force transmission protrusion 45 protrudes from the opening groove 35 formed on the rear side of the vehicle body of the housing 3 to the rear side of the vehicle body. The tilt driving force transmission protrusion 45 has a spherical surface 451 formed at the protrusion. When the feed screw shaft 441 rotates, the feed nut 445 is prevented from rotating by the opening groove 35, so that the tilt driving force transmission protrusion 45 performs a linear motion in the vertical direction along the opening groove 35.

  The outer ring of the lower bearing 443 is fitted in a bearing hole 432 formed in the upper part of a cylindrical adjustment nut 431. A male screw 433 formed on the outer periphery of the adjustment nut 431 is screwed into a female screw 36 formed on the housing 3.

  The worm wheel 422 is cut by a hob so that the amount of transfer increases along the central axis direction of the feed screw shaft 441 (the tooth trace direction of the worm wheel 422), and the tooth thickness thereof is along the tooth trace direction. It is thin at the center and thicker toward both ends. That is, the distance between the teeth of the worm wheel 422 is small at both sides of the tooth trace and large at the center.

  Therefore, by adjusting the position of the worm wheel 422 in the central axis direction by turning the adjustment nut 431, the meshing backlash between the worm wheel 422 and the worm 421 is adjusted to an appropriate value. The lock nut 434 to be screwed is tightened to prevent the adjustment nut 431 from coming loose. The adjustment nut 431, the male screw 433, the female screw 36, and the lock nut 434 constitute the backlash removing mechanism 43. By replacing the worm wheel 422 with a tapered helical gear, a backlash removing mechanism 43 similar to the above can be configured, and the backlash in meshing with the worm 421 can be adjusted to an appropriate value.

  As shown in FIG. 5, a hollow cylindrical sleeve 153 is attached to the column support plate 152 of the rear body mounting bracket 15 by welding. The cylindrical hole 154 of the sleeve 153 is open on the front side of the vehicle body, the tilt driving force transmission protrusion 45 is fitted into the cylindrical hole 154, and the spherical surface 451 of the tilt driving force transmission protrusion 45 is slidably fitted into the cylindrical hole 154. Match.

* Telescopic drive mechanism The basic structure of the telescopic drive mechanism 5 is the same as that of the tilt drive mechanism 4 described above. The telescopic drive mechanism 5 performs a telescopic motor 51, a speed reduction mechanism 52, a backlash removal mechanism 53, a feed screw mechanism 54, and linear movement for telescopic use. The telescopic driving force transmission projection 55 is configured to output.

  The telescopic motor 51 is fixed to the housing 3 by four bolts 513, and the central axis 512 of the output shaft 511 of the telescopic motor 51 is orthogonal to the central axis of the lower column 13 and obliquely upward to downward. Inclined. Thus, since the telescopic motor 51 is incorporated obliquely from above, there are few portions protruding downward from the electric steering column device 1, and a large space around the driver's knee can be secured.

  A worm 521 is attached to the output shaft 511 of the telescopic motor 51, and the worm wheel 522 attached to the feed screw shaft 541 is engaged with the worm 521 to transmit the rotation of the output shaft 511 to the feed screw shaft 541. . The worm wheel 522 and the worm 521 constitute a speed reduction mechanism 52.

  The worm wheel 522 is cut by a hob so that the amount of transfer increases along the central axis direction of the feed screw shaft 541 (the tooth trace direction of the worm wheel 522), and the tooth thickness thereof is along the tooth trace direction. It is thin at the center and thicker toward both ends. That is, the interval between teeth is small in both sides of the tooth trace and in the center.

  The feed screw shaft 541 extends parallel to the central axis of the lower column 13, and the vehicle body front side and vehicle body rear side are rotatably supported by the housing 3 by bearings (not shown). A female screw formed on the inner periphery of the feed nut 545 is screwed to a male screw formed on the outer periphery of the feed screw shaft 541. A feed screw mechanism 54 is configured by a bearing that supports the feed screw shaft 541, the feed nut 545, and the feed screw shaft 541.

  A telescopic driving force transmission protrusion 55 is fixed to the feed nut 545 with a bolt (not shown), and the telescopic driving force transmission protrusion 55 protrudes upward from the opening groove 37 formed on the upper side of the housing 3. The telescopic driving force transmission protrusion 55 has a spherical surface 551 formed at the protrusion. When the feed screw shaft 541 rotates, the feed nut 545 is prevented from rotating by the opening groove 37, so that the telescopic driving force transmission projection 55 linearly moves along the opening groove 37 in parallel with the central axis of the lower column 13. Do.

  Since the backlash removal mechanism 53 of the speed reduction mechanism 52 for the telescopic drive mechanism 5 has the same structure as the backlash removal mechanism 43 of the tilt drive mechanism 4, detailed illustration and description thereof will be omitted. The outer ring of the bearing on the front side of the vehicle body is supported by a cylindrical adjustment nut (not shown) screwed into a female screw (not shown) of the housing 3.

  By adjusting the position of the worm wheel 522 in the central axis direction by turning the adjustment nut, the backlash of the engagement between the worm wheel 522 and the worm 521 is adjusted to an appropriate value. The lock nut 534 to be screwed is tightened to prevent the adjustment nut from loosening. The backlash removing mechanism 53 is configured by the adjustment nut, a male screw (not shown) of the adjustment nut, a female screw of the housing 3 screwed to the male screw, and the lock nut 534.

  As shown in FIG. 5, a hollow cylindrical sleeve 143 is formed on the upper column 14 so as to protrude downward (through a long groove formed in the lower column 13 and protrude outward and downward from the outer periphery of the lower column). Has been. The cylindrical hole 144 of the sleeve 143 is opened at the lower side of the vehicle body, the telescopic driving force transmission projection 55 is fitted into the cylindrical hole 144, and the spherical surface 551 of the telescopic driving force transmission projection 55 is slidably fitted into the cylindrical hole 144. doing.

  Since the sub-assembly 2 is configured as described above, the sub-assembly 2 in which the tilt drive mechanism 4 and the telescopic drive mechanism 5 are integrated and the lower column 13 are connected to each other by the tilt drive force transmission protrusion 45, the telescopic drive. After the force transmission protrusion 55 is pushed into the hollow cylindrical sleeves 153 and 143 from the direction perpendicular to the linear motion direction, the bolts 33 and 34 need only be screwed in. Manufacturing costs are reduced.

* Operation of the electric steering column device In the electric steering column device 1 assembled with this subassembly 2, when the tilt position and the telescopic position of the steering wheel 17 need to be adjusted, the driver operates a switch (not shown). Thus, the telescopic motor 51 and the tilt motor 41 are rotated in either the forward or reverse direction.

  Then, the rotation of the telescopic motor 51 and the tilting motor 41 is decelerated and transmitted from the worms 521 and 421 to the worm wheels 522 and 422, and the feed screw shafts 541 and 441 integrated with the worm wheels 522 and 422 rotate. Thus, the feed nuts 545 and 445 perform linear motion.

  Then, the telescopic driving force transmission protrusion 55 and the tilt driving force transmission protrusion 45 fixed to the feed nuts 545 and 445 also perform linear motion. Since the telescopic driving force transmission projection 55 and the tilt driving force transmission projection 45 are engaged with the sleeves 143 and 153, respectively, for example, the direction in which the tilt driving force transmission projection 45 moves away from the lower column 13 (the vehicle body downward direction in FIG. 5). ), The lower column 13 tilts upward with the tilt central axis 121 as a fulcrum. Further, when the tilt driving force transmission protrusion 45 moves in a direction approaching the lower column 13 (the vehicle body upward direction in FIG. 5), the lower column 13 tilts downward with the tilt central axis 121 as a fulcrum.

  When the lower column 13 tilts, the tilt motion of the lower column 13 is an arc motion with the tilt center axis 121 as a fulcrum, and the tilt motion of the tilt driving force transmission protrusion 45 is parallel to the feed screw shaft 441 (lower column). 13 is a linear motion (in a direction perpendicular to the central axis 13), and therefore, a displacement occurs between the tilt driving force transmission protrusion 45 and the sleeve 153.

  However, since the spherical surface 451 at the tip of the tilt driving force transmission protrusion 45 freely rotates and moves in the axial direction with respect to the cylindrical hole 154 of the sleeve 153 to absorb the positional deviation, the tilt motion of the lower column 13 is smooth. To be done.

  Further, when the telescopic driving force transmission protrusion 55 moves to the front side of the vehicle body (leftward in FIG. 5), the upper column 14 moves telescopically along the lower column 13 to the front side of the vehicle body. Further, when the telescopic driving force transmission protrusion 55 moves to the rear side of the vehicle body (rightward in FIG. 5), the upper column 14 telescopically moves to the rear side of the vehicle body along the lower column 13.

  A spherical surface 551 is formed at the tip of the telescopic driving force transmission projection 55, and is in line contact with the cylindrical hole 144 of the sleeve 143 to freely rotate and move in the axial direction, so that the feed screw shaft 541 and the upper column 14 have some Even if misalignment or misalignment occurs, the error is absorbed and the telescopic motion of the upper column 14 can be performed smoothly.

* Second Embodiment Next, a second embodiment of the present invention will be described. FIG. 6 is a side view including a partially cutaway cross section of the electric steering column apparatus according to the second embodiment of the present invention. The subassembly shown in FIGS. The state where is attached is shown. The basic structure of the second embodiment is the same as that of the first embodiment described above, and only the differences will be described.

  As shown in FIG. 6, the electric steering column apparatus 1 according to the second embodiment of the present invention includes a front vehicle body mounting bracket 12, an electric power steering 19, a lower column (outer column) 13, and an upper column (inner column). 14, a rear body mounting bracket 15, an upper steering shaft 16, a steering wheel 17, a subassembly 2, and the like.

  The front vehicle body mounting bracket 12 has an upper plate 122 fixed to the vehicle body front side (left side in FIG. 6) of the vehicle body 11, and a side plate 123 extending downward from the upper plate 122. The front end of the vehicle body of the housing 191 of the steering 19 is pivotally supported so that the tilt position can be adjusted (oscillated in a plane parallel to the paper surface of FIG. 5). The electric power steering 19 includes an electric motor 192, a reduction gear box 193, an input shaft and an output shaft (not shown), and the like.

  A vehicle body front end portion of a hollow cylindrical lower column 13 is fixed to a vehicle body rear end of a housing 191 of the electric power steering 19. An upper column 14 is fitted to the inner periphery of the lower column 13 so as to be capable of telescopic position adjustment (sliding parallel to the central axis of the lower column 13). An upper steering shaft 16 is pivotally supported on the upper column 14, and a steering wheel 17 is fixed to a vehicle body rear side (right side in FIG. 5) end portion of the upper steering shaft 16.

  A lower steering shaft (not shown) is rotatably supported on the lower column 13. The lower steering shaft is spline-fitted with the upper steering shaft 16, and the upper steering shaft 16 rotates regardless of the telescopic position of the upper column 14. Is transmitted to the lower steering shaft.

  The rotation of the lower steering shaft is transmitted to an input shaft (not shown) of the electric power steering 19. The steering force of the steering wheel 17 transmitted to the input shaft is detected by a torque sensor (not shown) of the electric power steering 19, and the steering assist force corresponding to the detected magnitude of torque is sent from the electric motor 192 to the reduction gear box 193. It is transmitted and applied to an output shaft (not shown) of the electric power steering 19.

  The front end (left side in FIG. 5) of the output shaft is connected to the intermediate shaft 181 via an upper universal joint (not shown). The center of the upper universal joint is set at a concentric position with the center of the tilt center axis 121. The vehicle body front side end portion of the intermediate shaft 181 is connected to the pinion shaft 183 via the lower universal joint 182.

  Since the front side of the vehicle body of the pinion shaft 183 is connected to the steering gear 184, when the driver turns the steering wheel 17 by hand, the rotation of the upper steering shaft 16 is transmitted to the steering gear 184, and the steering angle of the wheel is adjusted. Can be changed.

  The upper plate 151 of the L-shaped rear-side vehicle body mounting bracket 15 is fixed to the vehicle body 11 in the vicinity of the vehicle body rear side (right side in FIG. 5) of the lower column 13, and extends downward from the vehicle body rear side of the upper plate 151. A column support plate 152 extends.

  The subassembly 2 shown in FIGS. 1 to 4 is attached to the outer periphery of the lower column 13 between the front vehicle body mounting bracket 12 and the rear vehicle body mounting bracket 15. Since the structure of the subassembly 2, the method of assembling to the lower column 13, the tilt position adjustment, and the telescopic position adjustment are the same as those in the first embodiment, description thereof is omitted.

  In the first embodiment and the second embodiment described above, the driving force transmission protrusion is formed on the feed nuts 445 and 545 side, but a sleeve is formed on the feed nuts 445 and 545 side, and the upper column 14 In addition, a driving force transmission protrusion may be formed on the column support plate 152 side.

  In the first and second embodiments described above, a motor is provided separately for telescopic use and tilt use. However, the motor output shaft is rotated by a clutch or the like for telescopic drive and tilt drive. By switching, a single motor may be used. Furthermore, although the subassembly 2 is attached below the center axis of the lower column 13, it may be attached above the center axis of the lower column 13.

  According to the first embodiment and the second embodiment described above, it is only necessary to assemble the sub-assembly in which the tilt drive mechanism and the telescopic drive mechanism are integrated into the lower column. Since the driving force can be connected to the side only by pushing in from the direction perpendicular to the direction of the linear motion, the assembling work is simplified and the manufacturing cost is reduced.

  Further, since the subassembly is attached between the front body bracket and the rear body bracket, the supporting rigidity of the heavy subassembly is large, and the vibration characteristics of the electric steering column device are improved.

  Furthermore, since the central axis of one motor is arranged parallel to the central axis of the lower column, there are few parts protruding downward from the steering column device, and a large space around the driver's knee can be secured. Become.

FIG. 6 is a front view including a partial cross section showing an embodiment of a subassembly incorporating the tilt drive mechanism and telescopic drive mechanism of the present invention, and is a view taken in the direction of arrows X-X in FIG. 5. It is a P arrow view of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. FIG. 5 is a side view including a partially cutaway section of the electric steering column apparatus according to the first embodiment of the present invention, showing a state in which the subassembly shown in FIGS. 1 to 4 is assembled. It is a side view including the partial notch section of the electric steering column apparatus of the 2nd Embodiment of this invention, The subassembly shown in FIGS. 1-4 was assembled | attached to the steering column apparatus with an electric power steering apparatus. Indicates the state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric steering column apparatus 11 Car body 12 Front side vehicle body mounting bracket 121 Tilt center axis 122 Upper plate 123 Side plate 13 Lower column 14 Upper column 143 Sleeve 144 Cylindrical hole 15 Rear side body mounting bracket 151 Upper plate 152 Column support plate 153 Sleeve 154 Cylindrical hole 16 Upper steering shaft 17 Steering wheel 18 Lower steering shaft 181 Intermediate shaft 182 Lower universal joint 183 Pinion shaft 184 Steering gear 19 Electric power steering 191 Housing 192 Electric motor 193 Reduction gear box 2 Subassembly 3 Housing 31 Flange 311 Mounting surface 312 Bolt hole 32 Boss portion 321 Mounting surface 322 Bolt hole 33, 34 Bolt 35 Open groove 36 Female screw 37 Opening groove 4 Tilt drive mechanism 41 Tilt motor 411 Output shaft 412 Center axis 413 Bolt 42 Deceleration mechanism 421 Worm 422 Worm wheel 43 Backlash removal mechanism 431 Adjustment nut 432 Bearing hole 433 Male screw 434 Lock nut 44 Feed screw mechanism 441 Feed Screw shaft 442, 443 Bearing 444 Male screw 445 Feed nut 446 Female screw 45 Tilt drive force transmission projection 451 Spherical surface 5 Telescopic drive mechanism 51 Telescopic motor 511 Output shaft 512 Center axis 513 Bolt 52 Deceleration mechanism 521 Worm 522 Worm wheel 53 Backlash removal mechanism 534 Lock nut 54 Feed screw mechanism 541 Feed screw shaft 545 Feed nut 55 Telescopic driving force transmission projection 551 Spherical surface

Claims (7)

A steering shaft with a steering wheel mounted on the rear side of the vehicle body,
A column capable of pivotally supporting the steering shaft and adjusting a tilt position with a tilt center axis as a fulcrum and a telescopic position adjustment along the center axis of the steering shaft,
Single housing,
Tilt motor,
A tilt drive mechanism that outputs rotation of the tilt motor as a linear motion of a tilt drive force transmission member via a speed reduction mechanism and a feed screw mechanism;
Telescopic motor,
A telescopic drive mechanism for outputting the rotation of the telescopic motor as a linear motion of a telescopic drive force transmission member via a speed reduction mechanism and a feed screw mechanism;
An electric steering column apparatus, wherein the tilt motor, the tilt drive mechanism, the telescopic motor, and the telescopic drive mechanism are assembled in advance in the housing to form a subassembly, and the subassembly is assembled to the column. Lower column,
A front body mounting bracket for pivotally supporting the lower column so that the tilt column can be adjusted with the tilt central axis as a fulcrum, which can be mounted on the vehicle body on the front side of the lower column.
Upper column fitted to the lower column so that the telescopic position can be adjusted in the longitudinal direction of the vehicle body,
A steering shaft rotatably supported by the upper column and having a steering wheel mounted on the rear side of the vehicle body;
A rear-side vehicle body mounting bracket that can be attached to the vehicle body at the rear side of the lower column,
Single housing,
Tilt motor,
A tilt drive mechanism for outputting rotation of the tilt motor as a linear motion of a tilt drive force transmission member via a speed reduction mechanism and a feed screw mechanism;
Telescopic motor,
A telescopic drive mechanism for outputting the rotation of the telescopic motor as a linear motion of a telescopic drive force transmission member via a speed reduction mechanism and a feed screw mechanism;
The tilt motor, the tilt drive mechanism, the telescopic motor, and the telescopic drive mechanism are incorporated in the housing in advance to form a subassembly, and the subassembly is disposed between the front body mounting bracket and the rear body mounting bracket. An electric steering column device that is assembled to In the electric steering column apparatus according to any one of claims 1 and 2,
The tilt drive mechanism and telescopic drive mechanism are:
An electric steering column apparatus comprising a backlash removing mechanism for removing backlash of each speed reduction mechanism. In the electric steering column device according to any one of claims 1 to 3,
An electric steering column apparatus, wherein a center axis of an output shaft of the tilt motor or the telescopic motor is arranged substantially parallel to a center axis of the steering shaft. In the electric steering column apparatus according to any one of claims 1 to 4,
The tilt driving force transmission member and the telescopic driving force transmission member are
An electric steering column having a spherical projection for transmitting a driving force, wherein the driving force is transmitted through a cylindrical sleeve into which the spherical projection is slidably fitted. apparatus. In the electric steering column device according to any one of claims 1 to 5,
The tilt motor and telescopic motor are composed of a single common motor,
An electric steering column apparatus comprising a switching mechanism that selectively transmits the rotation of the single motor to the tilt drive mechanism or the telescopic drive mechanism. A steering shaft with a steering wheel mounted on the rear side of the vehicle body,
A column capable of pivotally supporting the steering shaft and adjusting a tilt position with a tilt center axis as a fulcrum and a telescopic position adjustment along the center axis of the steering shaft,
Single housing,
Position adjustment motor,
A position adjustment drive mechanism that outputs the rotation of the position adjustment motor as a linear motion of the position adjustment drive force transmission member via a speed reduction mechanism and a feed screw mechanism;
An electric steering column apparatus, wherein the position adjusting motor and the position adjusting drive mechanism are assembled in advance in the housing to form a subassembly, and the subassembly is assembled to the column.

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