JP6536876B2 - Steering device - Google Patents

Description

  The present invention relates to a steering device.

  The steering apparatus described in Patent Document 1 below includes a support assembly fixed to a vehicle body and a tubular body holding a steering member. The tubular body is slidably attached to the support assembly. A movable pawl having teeth is rotatably fixed to the support assembly. The tubular body is provided with a guide piece having a plurality of recesses. The teeth of the movable claw mesh with the recess of the guide piece.

U.S. Patent Application Publication No. 2011/021536

In the steering apparatus of Patent Document 1, in order to maintain the state in which the teeth of the movable claws are engaged with the recesses at the time of locking, it is necessary to provide a biasing member that biases the movable claws toward the guide pieces. This may increase the number of parts and the number of assembling steps.
An object of the present invention is to provide a steering device capable of reducing the number of parts and the number of assembling steps.

In the invention according to claim 1, the steering member (2) is connected to one end (3a), and the steering shaft (3) expandable in the axial direction (X) and the steering shaft are held, the steering member side An upper jacket (20) and a lower jacket (21) opposite to the steering member, wherein the axial movement of the upper jacket with respect to the lower jacket enables axial expansion and contraction with the steering shaft A column jacket (4), a bracket (6) fixed to the vehicle body (22) for supporting the lower jacket, and a plurality of engaged teeth (60) fixed to the upper jacket and aligned along the axial direction Engaging member (50) having the following feature, a constraining portion (75) that is restrained from moving at the time of secondary collision, and a movable portion that moves at the time of secondary collision 76) and the movable portion of the shock absorbing member integrally provided with the shock absorbing member (57), and releasing the engagement position with the engaged gear and the engagement with the engaged gear An elastic engagement member (51) displaceable to the disengagement position and biasing itself toward the disengagement position, and rotatably supported by the lower jacket via the support shaft (53) A pressing member (52) which is displaced to a pressing position for pressing the engaging member to the engaging position by rotating around the support shaft, and provided integrally with the shock absorbing member, and pressing the pressing member It is a steering device (1) provided with the biasing member (56) which rotationally biases to the position side .

請 Motomeko 2 the described invention, according to claim 1, wherein the engagement member and the impact absorbing member and the biasing member is a steering device that is integrally formed of a single member.

The invention according to claim 3 is characterized in that, in claim 1 or 2 , the engagement member has an engagement tooth (72) meshing with the engaged tooth in the direction of the tooth streak (D), The direction is orthogonal to the axial direction, and the pressing member is a steering device which presses the engaging member in the direction of the teeth line .

Contact name above, like numbers in parentheses, but is representative of the reference numerals of the corresponding components in embodiments described later, it is not intended to limit the scope of the claims by these reference numerals.

According to the first aspect of the present invention, the engaging member in a state not pressed to the engaging position by the pressing member is displaced to the disengaging position by the biasing force of its own elasticity, and the engaging member with respect to the engaged member It is possible to release the case securely. Since the engaging member and the shock absorbing member are integrally formed, the number of parts and the number of assembling steps can be reduced. Further , since the biasing member is provided integrally with the shock absorbing member, the number of parts and the number of assembling steps can be reduced.

According to the second aspect of the present invention, by integrally forming the biasing member, the engaging member, and the shock absorbing member, the manufacturing cost can be reduced through the reduction of the number of parts and the number of assembling steps.
According to the third aspect of the present invention, the pressing member presses the engaging member in the direction of the teeth of the engaged teeth even when the engaging teeth and the engaged teeth are not well engaged at the time of locking. Therefore, when the engaging member is moved in the axial direction along with the movable portion of the impact absorbing member at the time of the secondary collision, the engaging teeth can be engaged with the engaged teeth in the direction of the tooth streak.

It is a schematic side view of a steering device concerning one embodiment of the present invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is an exploded perspective view of an important section of the present invention. It is sectional drawing along the VV line of FIG. FIG. 6 is a view showing a state in which the engagement member is in the disengagement position in FIG. 5; It is the figure which showed the state after the secondary collision in FIG. It is sectional drawing of the principal part of 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
First Embodiment
FIG. 1 is a schematic side view of a steering apparatus 1 according to an embodiment of the present invention.
Referring to FIG. 1, the steering apparatus 1 mainly includes a steering shaft 3, a column jacket 4, a lower bracket 5, an upper bracket (bracket) 6, and a lock mechanism 7.

In the steering shaft 3, a steering member 2 such as a steering wheel is connected to one end 3 a in the axial direction X. The other end 3 b of the steering shaft 3 is connected to the pinion shaft 13 of the steering mechanism 12 via the universal joint 9, the intermediate shaft 10 and the universal joint 11 in order.
The steering mechanism 12 is, for example, a rack and pinion mechanism that steers the steered wheels (not shown) in conjunction with the steering of the steering member 2. The rotation of the steering member 2 is transmitted to the steering mechanism 12 via the steering shaft 3 and the intermediate shaft 10 or the like. Further, the rotation transmitted to the steering mechanism 12 is converted into axial movement of a rack shaft (not shown). Thereby, the steered wheels are steered.

The steering shaft 3 has a cylindrical upper shaft 15 and a lower shaft 16 fitted so as to be relatively slidable by, for example, spline fitting or serration fitting. The steering shaft 3 is extendable in the axial direction X.
The steering shaft 3 is inserted into the column jacket 4. The column jacket 4 holds the steering shaft 3 and rotatably supports the steering shaft 3 via a plurality of bearings 17 and 18.

  The column jacket 4 has, for example, a cylindrical upper jacket 20 which is an inner jacket, and a lower jacket 21 which is an outer jacket, for example. The upper jacket 20 is disposed closer to the steering member 2 than the lower jacket 21. The lower jacket 21 is located on the opposite side of the upper jacket 20 from the steering member 2. The upper jacket 20 and the lower jacket 21 are fitted so as to be relatively slidable in the axial direction X of the steering shaft 3.

  Upper jacket 20 rotatably supports upper shaft 15 via a bearing 17. The lower jacket 21 rotatably supports the lower shaft 16 via a bearing 18. By moving the upper jacket 20 in the axial direction X of the steering shaft 3 with respect to the lower jacket 21, the column jacket 4 can expand and contract in the axial direction X together with the steering shaft 3.

  The lower bracket 5 is fixed to the vehicle body 22 by a fixed bracket 23, a tilt support shaft 24 supported by the fixed bracket 23, and a column fixed to the outer periphery of the lower jacket 21 and rotatably supported by the tilt support shaft 24. And a bracket 25. The column jacket 4 and the steering shaft 3 are rotatable (tilable) in the tilt direction Z about a tilt center CC which is a central axis of the tilt support shaft 24 as a fulcrum.

  The steering shaft 3 and the column jacket 4 are rotated (tilted) around the tilt center CC, whereby the position of the steering member 2 is adjusted in the tilt direction Z (so-called tilt adjustment). Further, the steering shaft 3 and the column jacket 4 are expanded and contracted in the axial direction X, whereby the position of the steering member 2 is adjusted in the telescopic direction (axial direction X) (so-called telescopic adjustment).

FIG. 2 is a cross-sectional view taken along line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
Referring to FIG. 2, upper bracket 6 is for supporting lower jacket 21. The upper bracket 6 includes a top 26 fixed to the vehicle body 22 by a bolt or the like (not shown), and a pair of side plates 27 extending downward from the top 26 in the tilt direction Z. Each of the pair of side plates 27 is formed with a long groove 28 for tilt extending in the tilt direction Z.

A slit 30 which extends in the axial direction X and cuts out one end of the lower jacket 21 is formed at an upper portion of the lower jacket 21 at one end in the tilt direction Z. The slits 30 are exposed upward and downward in the axial direction X and upward in the tilt direction Z toward the outside of the lower jacket 21.
At one end of the lower jacket 21 (upper end in the axial direction X), a pair of support portions 31 extending in the tilt direction Z while integrally defining the slit 30 from the direction Y orthogonal to the axial direction X and the tilt direction Z There is.

The pair of support portions 31 extends upward from the one end of the lower jacket 21 in the tilt direction Z. The pair of support portions 31 oppose each other across the slit 30 in the orthogonal direction Y. In each of the pair of support portions 31, a first support hole 33 penetrating the support portion 31 in the orthogonal direction Y is formed at the same position when viewed from the orthogonal direction Y (see FIG. 3).
In each of the pair of support portions 31, second support holes 34 penetrating the support portions 31 in the orthogonal direction Y are formed at the same position when viewed from the orthogonal direction Y. The second support hole 34 and the first support hole 33 are spaced from each other in the axial direction X (see also FIG. 4 described later).

The lock mechanism 7 is for locking the position of the steering member 2 (see FIG. 1) in the telescopic direction (axial direction X) and the tilt direction Z or for releasing the lock of the position of the steering member 2.
The lock mechanism 7 includes an operation member 40 manually operated by a driver or the like, a rotation shaft 41 having the operation member 40 attached at one end, a rotation cam 42 integrally rotating with the operation member 40, and a rotation cam 42 And a first clamping member 43 which is a non-rotating cam engaged with the cam.

  The rotating shaft 41 is a bolt having a shaft 41a extending in the orthogonal direction Y, a head 41b provided at one end of the shaft 41a, and a screw 41c provided at the other end of the shaft 41a. The rotating shaft 41 is inserted into the pair of long grooves 28 and the pair of second support holes 34. Thus, the rotation shaft 41 is rotatably supported by the lower jacket 21 via the pair of support portions 31.

  Between the head 41 b of the rotary shaft 41 and the one side plate 27, a proximal end 40 a at one end in the longitudinal direction of the operation member 40, the rotary cam 42 and the first tightening member 43 are interposed. The rotating cam 42 and the first tightening member 43 are supported by the shaft portion 41 a in the vicinity of the head portion 41 b of the rotating shaft 41. Movement of the rotation cam 42 in the axial direction (corresponding to the orthogonal direction Y) with respect to the rotation shaft 41 is restricted. The first tightening member 43 is movable in the axial direction of the rotating shaft 41.

Further, the lock mechanism 7 has a nut 44 screw-engaged with the screw portion 41 c of the rotating shaft 41, a second tightening member 45 interposed between the other side plate 27 and the nut 44, and a second tightening member 45. And an interposing member 46 interposed between the and the nut 44.
The second tightening member 45 and the interposing member 46 are movably supported in the axial direction (corresponding to the orthogonal direction Y) of the rotation shaft 41 by the shaft portion 41 a of the rotation shaft 41 in the vicinity of the nut 44. The intervening member 46 includes a washer 47 interposed between the nut 44 and the second tightening member 45, and a needle roller bearing 48 interposed between the washer 47 and the second tightening member 45.

When the rotating cam 42 rotates with respect to the non-rotating cam (the first tightening member 43) in accordance with the rotation operation of the operation member 40 in the locking direction, the first tightening member 43 is in the axial direction The two side plates 27 of the upper bracket 6 are held between the first tightening member 43 and the second tightening member 45. The pair of support portions 31 is tightened by the pair of side plates 27.
As a result, the slits 30 between the pair of support portions 31 are narrowed so as to reduce the diameter of the lower jacket 21 and the lower jacket 21 is pressed against the upper jacket 20 to achieve the tilt lock and the telescopic lock.

FIG. 4 is an exploded perspective view of the main part of the present invention. FIG. 5 is a cross-sectional view taken along the line V-V of FIG.
Referring to FIG. 4, the steering apparatus 1 includes an engaged member 50 having a pair of engaged teeth 49 opposed in the orthogonal direction Y, and an engagement member 51 engageable with the engaged teeth 49. And a pressing member 52 for pressing the engaging member 51 toward the engaged member 50, and a support shaft 53 for supporting the pressing member 52. The steering device 1 also includes a transmission member 55 for transmitting the rotation of the rotary shaft 41 to the pressing member 52, a pair of biasing members 56 for biasing the pressing member 52, and a driver or the like in the steering member 2 at the time of a vehicle collision. And an impact absorbing member 57 for absorbing an impact at the time of a secondary collision. The engaging member 51, the biasing member 56, and the impact absorbing member 57 are integrally formed of a single member by press-molding, for example, a metal plate or the like. The engaging member 51, the impact absorbing member 57, and the biasing member 56 do not necessarily have to be integrally formed of a single member, and different members may be integrally formed by welding or the like.

  The engaged member 50 is fixed to the outer circumferential surface 20 a of the upper jacket 20. The engaged teeth 49 are constituted by a plurality of engaged teeth 60 aligned in the axial direction X. The tooth tip of the engaged tooth 60 of one engaged tooth row 49 and the tooth tip of the engaged tooth 60 of the other engaged tooth row 49 face in the orthogonal direction Y. The plurality of engaged teeth 60 are undulated along the axial direction X. The direction of the tooth streak D of the engaged tooth 60 is orthogonal to the axial direction X.

The support shaft 53 is inserted into the first support hole 33 (see FIG. 3). Thus, the support shaft 53 is supported by the lower jacket 21 via the support portion 31. The support shaft 53 may rotate around a central axis C1 extending in the orthogonal direction Y in the first support hole 33, or may be pressed into the first support hole 33 and non-rotatable.
The pressing member 52 has a pressing portion 61 for pressing the engaging member 51, a receiving portion 62 to which the rotation of the rotary shaft 41 is transmitted via the transmitting member 55, and an axial direction X of the receiving portion 62 and the pressing portion 61. And a connecting portion 63 connecting the lower ends. Further, the pressing member 52 includes a pair of biased portions 64 biased by the biasing member 56 and a projection 65 for restricting the movement of the pressing member 52 with respect to the engagement member 51 in the axial direction X. The pressing portion 61, the receiving portion 62, the connecting portion 63, the pair of the urging portions 64, and the protrusion 65 are integrally formed of a single member.

The pressing portion 61 is disposed between the transmitted portion 62 and the engaged member 50 (see FIG. 5). The pressing portion 61, the receiving portion 62 and the connecting portion 63 define an insertion groove 66 through which the support shaft 53 is inserted. The insertion groove 66 is opened upward in the axial direction X.
Between the support shaft 53 and the pressing member 52, a support member 67 supported by the outer periphery of the support shaft 53, supporting the pressing member 52, and broken by the impact of the secondary collision is interposed. The support member 67 is a cylindrical member having an inner periphery fitted to the outer periphery of the support shaft 53 and an outer periphery fitted to the insertion groove 66 of the pressing member 52. The support member 67 has, for example, a groove 67a on the upper side in the axial direction X (the opening side of the insertion groove 66). At the time of the secondary collision, the support member 67 allows the pressing member 52 to be separated from the support shaft 53 by breaking from the groove 67a.

  Referring to FIG. 3, the pressing member 52 is rotatably supported by the lower jacket 21 (strictly speaking, a pair of support portions 31) via the support member 67 and the support shaft 53. When the support shaft 53 rotates around the central axis C <b> 1, the pressing member 52 rotates integrally with the support shaft 53. When the support shaft 53 is press-fit into the first support hole 33 and can not rotate, the pressing member 52 rotates relative to the support shaft 53. In any case, the pressing member 52 rotates in the circumferential direction C around the central axis C1 of the support shaft 53.

Referring to FIG. 4, the engaging member 51 extends in the axial direction X, and is provided on both sides of the main body 70 whose lower end in the axial direction X is connected to the shock absorbing member 57 and the main body 70 in the orthogonal direction Y And a pair of engaged teeth 71.
The main body 70 is formed with a recess 70 a through which the protrusion 65 of the pressing member 52 is inserted.
The pair of engagement teeth 71 includes a plurality of engagement teeth 72 aligned in the axial direction X. The engagement teeth 72 point their tips outside the main body 70 in the orthogonal direction Y. The plurality of engagement teeth 72 can mesh with the plurality of engaged teeth 60. The engagement member 51 is located between the pressing portion 61 of the pressing member 52 and the engaged member 50.

  The transmission member 55 integrally includes a cylindrical portion 73 having an insertion hole 73 a and a transmission portion 74 projecting from the cylindrical portion 73 radially outward of the cylindrical portion 73. Referring to FIG. 2, in the insertion hole 73 a, a portion of the rotation shaft 41 exposed in the slit 30 is inserted. In this state, a male spline 41d provided on the outer peripheral surface of the rotary shaft 41 and a female spline 73b provided on the inner peripheral surface of the cylindrical portion 73 are spline-fitted. Thus, the transmission member 55 is supported by the rotation shaft 41 so as to rotate integrally with the rotation shaft 41.

Referring to FIG. 4, the shock absorbing member 57 is formed, for example, by processing a single plate made of metal. The shock absorbing member 57 integrally includes a main body 78 extending along the axial direction X and a pair of side portions 79 opposed to each other in the orthogonal direction Y.
The main body portion 78 includes a pair of restraint portions 75 which are restrained from being moved by the lower jacket 21 at the time of the secondary collision, and a movable portion 76 which moves at the time of the secondary collision. The movable portion 76 is provided integrally with the main body portion 70 of the engagement member 51.

  Each of the pair of restraint portions 75 is fixed to the pair of support portions 31 via the corresponding side portions 79. The movable portion 76 extends in the axial direction X, and is connected to the main body 70 of the engagement member 51 at the upper end in the axial direction X. A groove 77 extending in the axial direction X is formed between the constraining portion 75 and the movable portion 76. The groove 77 may be a bottomed groove or a through groove.

  The pair of biasing members 56 have a plate shape extending in the axial direction X, and are provided integrally with the shock absorbing member 57. More specifically, each biasing member 56 is cantilevered from one end of the corresponding restraint portion 75 of the shock absorbing member 57. The proximal end of each biasing member 56 is supported by a corresponding restraint 75 of the shock absorbing member 57. The pair of biasing members 56 are elastically deformable up and down in the tilt direction Z.

Each biasing member 56 abuts on the locking contact portion 64 a of the corresponding biased portion 64 of the pressing member 52 as shown in FIG. 5 in the locked state of the lock mechanism 7, and the unlocked state of the lock mechanism 7. Then, as shown in FIG. 6, it abuts on the unlocking contact portion 64 b of the corresponding biased portion 64 of the pressing member 52.
As shown in FIG. 5, the in-lock contact portion 64 a is formed in a flat surface parallel to the central axis C <b> 1 of the support shaft 53. When the lock mechanism 7 is in the locked state, the biasing members 56 and the corresponding biased portions 64 are in surface contact with each other in parallel with the axial direction X. The biasing member 56 serves to guide the detachment of the pressing member 52 from the support shaft 53 at the time of a secondary collision.

The biasing member 56 may not be provided in a pair, but may be one. When the biasing member 56 is one, the biased portion 64 of the pressing member 52 is also one.
Referring to FIG. 5, the position of engagement member 51 when engaging with the plurality of engaged teeth 60 will be referred to as an engagement position. The position of the pressing member 52 when the engaging member 51 is in the engaging position will be referred to as a pressing position. The pressing member 52 presses the engaging member 51 in a direction intersecting the axial direction X (corresponding to the direction of the tooth streak D of the engaged tooth 60). Further, as shown in FIG. 6, the position of the engagement member 51 when the engagement with the engaged teeth 60 is released is referred to as an engagement release position.

  At the time of locking, the engagement member 51 is located at the engagement position. When the transmission member 55 rotates with the rotation shaft 41 in association with the rotation operation of the operation member 40 (see FIG. 2) in the unlocking direction (the direction opposite to the locking direction), the rotation of the rotation shaft 41 is The light is transmitted to the receiving portion 62 of the pressing member 52 through the transmitting portion 74 of 55. Since the pressing member 52 rotates about the support shaft 53, the rotation of the rotation shaft 41 transmitted from the transmission unit 74 is converted into a rotation along the circumferential direction C of the support shaft 53. As a result, in the unlocked state of the lock mechanism 7, the pair of biasing members 56 are pushed upward in the tilt direction Z by the unlocking contact portions 64b of the pair of biased portions 64 of the pressing member 52, and are elastic. Deform.

  On the other hand, when the pressing member 52 rotates along the circumferential direction C of the support shaft 53, the pressing portion 61 separates from the main body 70 of the engagement member 51. The main body portion 70 of the engagement member 51 has an elasticity that biases itself to the disengagement position. The engagement member 51 is separated from the engaged member 50 by this elasticity. As a result, the engagement between the engagement member 51 and the engaged tooth 60 of the engaged member 50 is released.

  As described above, by the rotation operation of the operation member 40 in the unlocking direction, the rotary shaft 41 is finally rotated until the engagement of the engagement member 51 with the engaged tooth 60 of the engaged member 50 is released. Be done. In this state, the pressing member 52 is supported by the transmission member 55 in a state of being biased by the biasing member 56, and is maintained at a predetermined position (referred to as a pressing release position) in the circumferential direction C.

  Conversely, by rotating the operation member 40 (see FIG. 2) in the locking direction, the transmission portion 74 of the transmission member 55 tends to separate from the transmission portion 62 of the pressing member 52. The pressing member 52 is rotated in the circumferential direction C by being urged to the pressing position side by the biasing member 56. With rotation around the support shaft 53, the pressing member 52 is displaced to a pressing position for pressing the engaging member 51 to the engaging position. Thereby, the engagement member 51 engages with the plurality of engaged teeth 60 of the engaged member 50.

As described above, the rotation operation of the operation member 40 can displace the engagement member 51 between the engagement position and the engagement release position.
Next, the operation of the steering device 1 at the time of a secondary collision will be described. The following description will be made also with reference to FIG. 7 showing the state after the secondary collision.
Referring to FIG. 5, in the case of a secondary collision, the load from steering member 2 (see FIG. 1) is transmitted to upper jacket 20, so upper jacket 20 is opposite to steering member 2 along axial direction X Try to move to The engaged member 50 fixed to the upper jacket 20 tries to move together with the upper jacket 20. During driving of the vehicle, the position of the steering member 2 is normally locked, so the engagement member 51 is located at the engagement position. Therefore, the impact due to the secondary collision is transmitted from the engaged member 50 to the engagement member 51. When the pressing member 52 is in the pressing position, the protrusion 65 of the pressing member 52 is inserted into the recess 70 a provided in the main body 70 of the engaging member 51. Thus, the position of the pressing member 52 with respect to the engaging member 51 in the axial direction X is determined, the pressing member 52 tends to move in the axial direction X together with the engaging member 51.

  Therefore, referring to FIG. 7, pressing member 52 separates from support shaft 53 by breaking support member 67, and upper jacket 20 moves relative to lower jacket 21. Thus, the movable portion 76 of the shock absorbing member 57 moves relative to the restraint portion 75, whereby the movable portion 76 is deformed. When the groove 77 is a bottomed groove, the main portion 78 of the shock absorbing member 57 is torn in the groove 77 simultaneously with the deformation of the movable portion 76. Thereby, the impact due to the secondary collision is absorbed by the impact absorbing member 57. Unlike the first embodiment, the shock absorbing member 57 may absorb the impact of the secondary collision by deformation, squeezing or the like.

In the first embodiment, the engagement member 51 in a state not pressed to the engagement position by the pressing member 52 is displaced to the disengagement position by its own elastic bias, and the engagement with the engaged member 50 It can be released reliably. Since the engaging member 51 and the shock absorbing member 57 are integrally formed, the number of parts and the number of assembling steps can be reduced.
Further, since the biasing member 56 is provided integrally with the shock absorbing member 57, the number of parts and the number of assembling steps can be reduced.

Further, by integrally forming the biasing member 56, the engaging member 51, and the impact absorbing member 57, the manufacturing cost can be reduced through the reduction of the number of parts and the number of assembling steps.
In addition, even when the engaging teeth 72 and the engaged teeth 60 do not mesh well at the time of locking and the engaging teeth 72 ride on the engaged teeth 60, the pressing member 52 is in the tooth direction D of the engaged teeth 60. Since the engaging member 51 is pressed, when the engaging member 51 is moved in the axial direction X along with the movable portion 76 of the impact absorbing member 57 in the secondary collision, the engaging tooth 72 is engaged 60 can be engaged from the direction D of the tooth line.
Second Embodiment
FIG. 8 is a cross-sectional view of the main part of the second embodiment of the present invention. In FIG. 8, the same members as those described above are denoted by the same reference numerals, and the description thereof will be omitted.

  Referring to FIG. 8, unlike the steering device 1 of the first embodiment, the steering device 1P of the second embodiment does not include the engaged member 50, the engagement member 51 and the pressing member 52, and instead This is a point including the engaged member 80 and the engagement member 81. In the second embodiment, the biasing member 56, the engaged member 80, and the shock absorbing member 57 are integrally formed of a single member.

  The engaged member 80 is provided integrally with the shock absorbing member 57. The engaged member 80 is fixed to the outer circumferential surface 20 a of the upper jacket 20 and has a plurality of engaged teeth 82 aligned along the axial direction X. In the second embodiment, the engaged teeth 82 are adjacent to the holes 83 which are equally spaced in the axial direction X and extend in the orthogonal direction Y, and from above and below the axial direction X with respect to each hole 83 It is comprised by the some division part 84 which divides the hole 83 from the axial direction X. As shown in FIG. Unlike the second embodiment, the engaged tooth 82 may be configured by a striped tooth that protrudes downward from the engaged member 50 in the tilt direction Z and extends in the orthogonal direction Y.

The engaging member 81 has substantially the same shape as the pressing member 52 of the first embodiment, but instead of the pressing portion 61, the engaging member 81 can be engaged with the engaged tooth 82 of the engaged member 80. A tooth 86 has an arm 87 provided at its tip.
The arm portion 87 is disposed between the transmitted portion 62 and the engaged member 50. The arm portion 87, the receiving portion 62 and the connecting portion 63 define an insertion groove 66 through which the support shaft 53 is inserted.

  Between the support shaft 53 and the engagement member 81, a support member 67 is supported by the outer periphery of the support shaft 53, supports the engagement member 81, and is broken by the impact of a secondary collision. The engagement member 81 is rotatably supported by the lower jacket 21 (strictly, a pair of support portions 31) via the support member 67 and the support shaft 53. The engagement member 81 rotates in the circumferential direction C around the central axis C1 of the support shaft 53.

The position of the engagement member 51 when engaging with the plurality of engaged teeth 82 will be referred to as an engagement position. The position of the engagement member 81 when the engagement with the engaged tooth 82 is released is referred to as an disengagement position.
At the time of locking, the engagement member 81 is in the engagement position. When the transmission member 55 rotates with the rotation shaft 41 in response to the rotation operation of the operation member 40 (see FIG. 2) in the unlocking direction, the rotation of the rotation shaft 41 is engaged via the transmission portion 74 of the transmission member 55 It is transmitted to the receiver 62 of the member 81. Since the engagement member 81 rotates around the support shaft 53, the rotation of the rotation shaft 41 transmitted from the transmission unit 74 is converted into a rotation along the circumferential direction C of the support shaft 53. When the engaging member 81 rotates in the circumferential direction C, the pair of biasing members 56 are pushed upward in the tilt direction Z by the unlocking contact portion 64b of the pair of biased portions 64 and elastically deform. . By the rotation operation of the operation member 40 in the unlocking direction, the rotation shaft 41 is finally held until the engagement between the engagement tooth 86 of the engagement member 81 and the engagement tooth 82 of the engaged member 80 is released. Will be rotated.

  Conversely, by rotating the operation member 40 (see FIG. 2) in the locking direction, the transmission portion 74 of the transmission member 55 tends to be separated from the transmission portion 62 of the engagement member 81. The engagement member 81 is rotated in the circumferential direction C by being rotationally biased by the biasing member 56 toward the engagement position. Thereby, the plurality of engaging teeth 72 of the engaging member 81 and the engaged teeth 60 of the engaged member 50 are engaged.

As described above, the rotation operation of the operation member 40 can displace the engagement member 81 between the engagement position and the engagement release position.
At the time of the secondary collision, the engaged member 80 fixed to the upper jacket 20 tries to move together with the upper jacket 20. Since the engagement member 81 is in the engagement position, the impact due to the secondary collision is transmitted from the engaged member 80 to the engagement member 81. Therefore, when the support member 67 is broken, the engagement member 81 is separated from the support shaft 53, and the upper jacket 20 moves relative to the lower jacket 21. Thus, the movable portion 76 of the shock absorbing member 57 moves relative to the restraint portion 75, whereby the movable portion 76 is deformed. When the groove 77 is a bottomed groove, the main portion 78 of the shock absorbing member 57 is torn in the groove 77 simultaneously with the deformation of the movable portion 76. Thereby, the impact due to the secondary collision is absorbed by the impact absorbing member 57.

In the second embodiment, since the biasing member 56 is provided integrally with the engaged member 80 and the shock absorbing member 57, the number of parts and the number of assembling steps can be reduced.
Further, by integrally forming the biasing member 56, the engaged member 80, and the shock absorbing member 57, the manufacturing cost can be reduced through the reduction of the number of parts and the number of assembling steps.
The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims.

For example, in the first embodiment, the steering device 1 may not include the biasing member 56. In this case, the pressing member 52 may not be provided with the pair of biased portions 64.
The steering devices 1 and 1 P are so-called lever-on-lever type steering devices in which the base end portion 40 a of the operation member 40 is disposed above the upper jacket 20 in the tilt direction Z. The present invention can also be applied to a so-called lever-down type steering apparatus in which the end 40 a is disposed below the upper jacket 20 in the tilt direction Z.

  Further, the steering apparatus 1 is not limited to a manual steering apparatus in which the steering of the steering member 2 is not assisted, but also in a column assist type electric power steering apparatus (C-EPS) in which the steering of the steering member 2 is assisted by an electric motor. Good.

DESCRIPTION OF SYMBOLS 1 ... Steering apparatus, 1P ... Steering apparatus, 2 ... Steering member, 3 ... Steering shaft, 3a ... One end, 4 ... Column jacket, 6 ... Upper bracket, 20 ... Upper jacket, 21 ... Lower jacket, 22 ... Vehicle body, 50 ... 50 Engaged member, 51: engaging member, 52: pressing member, 53: supporting shaft, 56: biasing member, 57: impact absorbing member, 60: engaged tooth, 72: engaging tooth, 75: restraint portion , 76: movable portion, 80: engaged member, 81: engagement member, 82: engaged tooth, X: axial direction, D: tooth direction

Claims (3)

A steering shaft is connected at one end, and the steering shaft is axially extensible and contractible;
The steering shaft is held, the upper jacket on the steering member side and the lower jacket opposite to the steering member are provided, and the axial movement of the upper jacket with respect to the lower jacket causes the shaft together with the steering shaft A column jacket that can stretch in the direction,
A bracket fixed to the vehicle body and supporting the lower jacket;
An engaged member fixed to the upper jacket and having a plurality of engaged teeth aligned along the axial direction;
An impact absorbing member including a restraining portion which is restrained from moving at the time of a secondary collision and a movable portion which moves at the time of the secondary collision;
It is provided integrally with the movable portion of the shock absorbing member, and is displaceable between an engagement position engaging with the engaged tooth and an engagement releasing position releasing the engagement with the engaged tooth, An elastic engagement member for urging the disengagement position;
A pressing member which is rotatably supported by the lower jacket via a support shaft and is displaced to a pressing position for pressing the engagement member to the engagement position by rotating around the support shaft;
A steering apparatus , comprising: an urging member provided integrally with the impact absorbing member and rotationally urging the pushing member toward the pushing position . The steering apparatus according to claim 1 , wherein the engagement member, the shock absorbing member, and the biasing member are integrally formed of a single member. In Claim 1 or 2 , the engagement member has an engagement tooth which meshes with the engaged tooth in the direction of the tooth streak,
The tooth direction is orthogonal to the axial direction,
The steering device, wherein the pressing member presses the engaging member in the direction of the tooth line.

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