CN108909822A

CN108909822A - A kind of locking system of steering column assembly, steering column assembly and vehicle

Info

Publication number: CN108909822A
Application number: CN201810603194.2A
Authority: CN
Inventors: 刘冲; 孙立志; 何志敏; 张啸; 沈佳
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Wenzhou Ruizi Intelligent Equipment Co ltd
Priority date: 2018-06-12
Filing date: 2018-06-12
Publication date: 2018-11-30
Anticipated expiration: 2038-06-12
Also published as: CN108909822B

Abstract

The present invention provides a locking device for a steering column assembly, comprising: an adjustment bracket having a first sliding groove and a second sliding groove substantially opposite to each other and defining a longitudinal adjustment path extending along a longitudinal direction, the first A positioning piece with a plurality of teeth is formed in the chute; a locking mechanism, the locking mechanism includes an adjustment shaft and a matching positioning piece arranged on the adjustment shaft, the adjustment shaft passes through the first chute and the second chute in turn, and is set To allow movement along the longitudinal adjustment path; the locking mechanism is arranged to be operable to limit the steering column assembly in a locked position or a disengaged position in which the positioning member engages with a mating positioning member and in the disengaged position , the locating piece is disengaged from the mating locating piece. In addition to ensuring that the steering column assembly can be adjusted in the axial direction and the radial direction, the locking device of the present invention can also prevent the upward movement of the steering column when a collision occurs.

Description

A kind of locking system of steering column assembly, steering column assembly and vehicle

Technical field

The present invention relates to steering column assembly technical field, more particularly to a kind of steering column assembly locking system, Steering column assembly and vehicle.

Background technique

Steering column for vehicle may include allow operator selectively steering column is located and fixed within it is more The adjustment device of any position in a position.The adjustment device may include the inclination for promoting steering column to change tilt angle Device and the telescopic device for promoting tubing string change length.

When colliding especially head-on crash, driver is struck on steering wheel, and air bag is from steering column upper end bullet Out, to give steering column one active force in moment, which makes steering column crumple along the axial thrust load of steering column Energy-absorbing, the radial component along steering column upwarp steering column.Upwarping movement causes steering column crumple endergonic process unstable It is fixed, and steering column shield is interfered with periphery member during upwarping, to hinder steering column crumple energy-absorbing.This Outside, it upwarps movement and also results in steering column and air bag is driven to upwarp together, air bag and the head contact position of driver occurs Variation, causes protecting effect uncontrollable.

However, the locking device in the prior art for locking the steering column not can effectively prevent collision process Middle steering column upwarps movement.This is because operator to the angle and length adjustment of steering column in place after, need to remove Fixed handle directly affects the anti-frictional force size upwarped of steering column to compress locking, to the adjusting force of handle, however, general behaviour The handle adjusting force that author can apply is smaller, and can not effectively prevent steering column upwarps movement.

Summary of the invention

The inventors of the present application found that in the prior art locking device be usually provided with one along with the steering tube axis of a cylinder The sliding slot extended to the substantially parallel longitudinal direction in direction and the axis that can be slided along the sliding slot, to pass through in operator When being operatively coupled to the handle of the axis one end and the locking device being made to be in release conditions, tilting gearing and telescopic device are discharged, To which the angle and length of steering column be adjusted.However, when colliding, sliding slot with it is slidable along the sliding slot It is only to constrain the rotary motion of steering column by interplanar friction and upwarp movement between axis, this is not enough to prevent to turn to The rotation of tubing string and upwarp movement.

It is an object of the present invention to solve to may be implemented steering column assembly in the prior art in inclined direction and length The technical issues of degree adjustable locking system in direction cannot prevent steering column from upwarping movement when colliding.

A further object of the invention is to provide for that a kind of structure is simple, easy to operate and lower-cost locking Device.

The present invention provides a kind of locking systems of steering column assembly, including：

Adjusting bracket, with substantially relative to each other and limit the of the vertical adjustment path extendd in the longitudinal direction One sliding slot and second sliding slot are formed with the locating piece with multiple teeth portion in the first sliding groove；

Locking mechanism, the locking mechanism include adjustment axis for being connected with steering column assembly and are arranged described Pairing locating piece in adjustment axis, the adjustment axis sequentially pass through the first sliding groove and the second sliding slot, and be arranged to The steering column assembly is moved along the vertical adjustment path movement；And

The pairing locating piece is configured to operationally be meshed with the locating piece in the first sliding groove described in locking Adjustment axis is to be limited to latched position for the steering column assembly and be configured to operationally nibble with locating piece disengaging It closes, allows the steering column assembly to be detached from the latched position to discharge the adjustment axis.

Optionally, the locating piece is with the multiple tooth sockets formed by the multiple teeth portion, the pairing locating piece tool The first convex block for thering is at least one to be meshed with the tooth socket.

Optionally, the multiple tooth socket is arranged spaced apart along the longitudinal direction, each tooth socket along with it is described Longitudinal direction generally perpendicular direction extends.

Optionally, the locating piece and the pairing locating piece are disengaged from and the adjustment axis is along the vertical adjustment When path is mobile, first convex block is allowed to be adjusted to engage with another tooth socket from engaging with one of tooth socket.

Optionally, the pairing locating piece is configured to rotatable around the adjustment axis and removable along the adjustment axis.

Optionally, the locking mechanism further includes the angle for being arranged in the adjustment axis and being resisted against in the first sliding groove Limited block is spent, the angle limit block is arranged to allow to be in contact with the steering column assembly.

Optionally, the angle limit block is configured to when being resisted against in the first sliding groove, with the first sliding groove It is limited between the contact surface being in contact and forms at least one engagement cavity；

The pairing locating piece has at least one second convex block corresponding at least one described engagement cavity, and described the Two convex blocks and first convex block are located at the same surface of the pairing locating piece, and second convex block is arranged in the locking It is bonded on when position in the engagement cavity, and is detached from the engagement cavity when being detached from the latched position.

Optionally, the locking mechanism further include be arranged in the first sliding groove and be located at the steering column assembly and Elastic piece structure between the angle limit block,

The elastic piece structure is arranged to be squeezed in the latched position, to make the angle limit block along institute The axial direction for stating adjustment axis is mobile towards the steering column assembly, and the elastic piece structure is extensive when being detached from the latched position Complex deformation, so that the angle limit block be made to move along the axial direction of the adjustment axis away from the steering column assembly It is dynamic, and then it is disengaged from the locating piece with the pairing locating piece.

Particularly, the present invention also provides a kind of steering column assemblies, including：

Steering shaft, one end are connected with the steering wheel of vehicle, are used for transmission the steering force of the steering wheel input；

First axle sleeve is joined to the diameter of axle in the steering shaft；

Second axle sleeve, second axle sleeve are engaged to above-mentioned locking system, and allow to be limited by the locking system In latched position or it is detached from the latched position；Wherein

Second axle sleeve is arranged to hold first axle sleeve tightly in the latched position, is being detached from the latched position When, second axle sleeve can relatively described first axle sleeve telescopically slided along the flexible axis, and drive the locking system Locking mechanism together along adjusting bracket limit vertical adjustment path move.

Particularly, the present invention also provides a kind of vehicles, including above-mentioned locking system and above-mentioned steering column group Part.

According to the solution of the present invention, it is engaged by locating piece with pairing locating piece, thus will in the prior art merely Steering column rotary motion is constrained by planar friction power and relies instead upon engagement force between tooth, is thus substantially increased about The restraining force of angle change occurs for beam steering column assembly, thus guaranteeing steering column assembly in the axial direction and radial direction side Steering column upwarps movement to except adjustable, while when can also prevent collision.

In addition, the present invention, which is pursued by the way that simple structure is arranged, realizes the anti-function of upwarping.The locking system structure letter It is single, without using the structure that structure is complicated, components are more, said effect can be realized using common a small amount of components Structure, to reduce costs to a certain extent.Also, since components are less, phase is lost in mechanical movement transmittance process To less, effect is very good, and reduces components maintenance rate.

According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter The above and other objects, advantages and features of the present invention.

Detailed description of the invention

Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter. Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these What attached drawing was not necessarily drawn to scale.In attached drawing：

Fig. 1 is the schematic diagram of locking system and steering column assembly according to an embodiment of the invention；

Fig. 2 is the schematic diagram of steering column assembly according to an embodiment of the invention；

Fig. 3 is the schematic diagram at a visual angle of locking system according to an embodiment of the invention；

Fig. 4 is the schematic of another visual angle of the locking system of steering column assembly according to an embodiment of the invention Structure chart；

Fig. 5 is the schematic diagram at a visual angle of pairing locating piece according to an embodiment of the invention；

Fig. 6 is the schematic diagram at a visual angle of cam bit according to an embodiment of the invention；

Fig. 7 is the schematic diagram at another visual angle of cam bit according to an embodiment of the invention；

Fig. 8 is the schematic diagram at another visual angle of pairing locating piece according to an embodiment of the invention；

Fig. 9 is the schematic diagram of angle limit block according to an embodiment of the invention.

Specific embodiment

Referring to Fig. 1 and Fig. 2, shown steering column assembly 1 can not only carry out gradient adjusting, can also be into Row length adjustment, i.e., axially direction is adjusted, wherein double-head arrow A indicates the direction that gradient is adjusted, double-head arrow B table Show the direction of length adjustment.

Shown steering column assembly 1 has for vehicle and is attached to steering wheel backward along its rotation axis The steering shaft 11 of the distal end 31 of (not shown).Steering shaft 11 is engaged on the first axle sleeve 12 and in first axle sleeve 12 It is rotated.First axle sleeve 12 is arranged in the second axle sleeve 13, which is engaged to the adjusting bracket of locking system 2 21 and support bracket 32 on.It is rigid by multiple fastener (not shown)s in the adjusting bracket 21 and the support bracket 32 Property engagement all in vehicle chassis (not shown).

Locking system 2 can lock or release steering column assembly 1, when locking steering column assembly 1, the second axle sleeve 13 It holds the first axle sleeve 12 tightly, steering shaft 11 and the first axle sleeve 12 is limited to latched position.It is defined in steering column assembly 1 In latched position, steering column assembly 1 neither can be carried out gradient adjusting, can not carry out length adjustment.It is turned in release When column assemblies 1, the first axle sleeve 12 can telescopically be slided with respect to the second axle sleeve 13 along flexible axis, wherein flexible axis is substantially It is parallel to the central axis C of steering shaft 11, and the gradient of steering column assembly 1 can be adjusted.

Second axle sleeve 13 have a section be unclosed annular fastener 131,131 inner surface of fastener be configured to and The outer surface of first axle sleeve 12 matches, so that the second axle sleeve 13 is substantially buckled in outside the first axle sleeve 12.Along fastener 131 Two unclosed ends (1311,1312) extend outward to form two clamping limbs (1321,1322) relative to each other, this two clampings Location hole (1331,1332) relative to each other there are two being opened up on arm (1321,1322), for the adjustment axis of locking mechanism 22 221 pass through.It can be reduced between two unclosed ends (1311,1312) by applying clamping force to clamping limb (1321,1322) Spacing discharge the clamping force so that the second axle sleeve 13 be made to hold the first axle sleeve 12 tightly, two unclosed ends (1311,1312) it Between spacing restore to the original state, to make opposite second axle sleeve 13 of the first axle sleeve 12 slidably.

Locking system 2 provides above-mentioned clamping force.Referring to Fig. 1 and Fig. 3, adjusting bracket 21 is U-shaped in general, and passes through company Fishplate bar 211 and vehicle chassis are rigidly connected.Adjusting bracket 21 includes two being connected with connecting plate 211, relative to each other and big Parallel the first wall 212 and the second wall 213 on body offer substantially arc on the first wall 212 and the second wall 213 respectively And limit the first sliding groove 2121 and second sliding slot 2131 in vertical adjustment path, wherein vertical adjustment path and steering column Path when component 1 carries out gradient adjusting is consistent.Second wall 213 has a tune in the side far from the first wall 212 Nut 222 is saved, with the secured adjusted axis 221 when adjustment axis 221 passes through the second axle sleeve 13.It is fixed that pairing is arranged in adjustment axis 221 Position part 223, when adjustment axis 221 passes through the second axle sleeve 13, pairing locating piece 223 is resisted against at the first wall 212.By adjusting The stress of locating piece 223 and adjusting nut 222 is matched on nodal axisn 221, to adjust two folders for being applied to the second axle sleeve 13 The clamping force size of gripping arm (1321,1322).

Referring to Fig. 5, matching locating piece 223 is discoid, similar cam disc, the first surface of the pairing locating piece 223 There are four track grooves 2232 for 2231 tools, and such as cam bit 224 with the pairing locating piece 223 cooperation can be along the track groove The thickness of 2232 slidings, the corresponding pairing locating piece 223 of each track groove 2232 changes along the track groove 2232.Such as Shown in Fig. 6, cam bit 224 accordingly has there are four sliding shoe 2241, and four sliding shoes 2241 are respectively along four track grooves When 2232 sliding, since the face contacted in each track groove changes, change so as to cause extruding force, Jin Erke So that pairing locating piece 223 is moved along adjustment axis 221.

Referring to Fig. 7, which has the coordinating block 2245 matched with operation handle 225, which connects It is bonded to operation handle 225.Operation handle 225 rotate when drive cam bit 224 rotate together, four sliding shoes 2241 respectively along When four track grooves 2232 are slided, to make the extruding force for matching locating piece 223 be gradually increased, until by steering column assembly 1 It squeezes to latched position.For steering column assembly 1 is limited to above-mentioned latched position, and can substantially be protected when colliding Card latched position does not change, and the locating piece 2123 with multiple teeth portion 2122 is formed in first sliding groove 2121, this is fixed Position part 2123 is intermeshed in latched position and pairing locating piece 223, and de- with pairing locating piece 223 when being detached from latched position From engagement.

Multiple teeth portion 2122 in first sliding groove 2121 along first sliding groove 2121 extending direction i.e. gradient tune Direction arrangement is saved, forms a tooth socket 2124 between two neighboring teeth portion 2122, multiple tooth sockets 2124 of formation are equally along inclining The arrangement of pitch adjustment direction.By diagram it is found that first sliding groove 2121 has two supporting parts for supporting multiple teeth portion 2122 (2125,2126).What two supporting parts (2125,2126) were symmetrically disposed in first sliding groove 2121 adjusts direction along gradient Two sides, and there is a gap, the width in the gap between the lateral edge (2127,2128) of two supporting parts (2125,2126) Greater than the diameter of adjustment axis 221, can be passed through for adjustment axis 221.

Referring to Fig. 8, matching on the second surface 2233 opposite with its first surface 2231 of locating piece 223 tool, there are two the One convex block (2234,2235), in latched position, two the first convex blocks (2234,2235) respectively with two supporting parts (2125, 2126) corresponding tooth socket 2124 is meshed on, and when being detached from latched position, two the first convex blocks (2234,2235) are respectively with two Corresponding tooth socket 2124 is disengaged from a supporting part (2125,2126).In order to make the first convex block (2234,2235) relatively easily It is engaged with tooth socket 2124, the first convex block (2234,2235) is configured to wedge block, and the teeth portion 2122 in first sliding groove 2121 is configured to Chisel teeth, in this way, when the first convex block (2234,2235) and tooth socket 2124 are not at a fully engaged, it can between wedge block and chisel teeth To be finely adjusted automatically, so that it is at a fully engaged to carry out the first convex block (2234,2235) with tooth socket 2124.To steering column group When the gradient of part 1 is adjusted, the first convex block (2234,2235) can be adjusted to from one pair of them tooth socket and another pair Tooth socket is meshed.Herein, a pair of of tooth socket refers to two tooth sockets that two the first convex blocks (2234,2235) are engaged simultaneously.

Referring to Fig. 9, for the locking stability for reinforcing locking system 2, locking mechanism 2 also has an angle limit block 226, should Angle limit block 226 is set in adjustment axis 221, and side 2261 is resisted against two supporting parts in first sliding groove 2121 The lateral edge (2127,2128) of (2125,2126), the surface far from pairing locating piece 223 are allowed in latched position It is in contact with the second axle sleeve 13 of steering column assembly 1.Angle limit block 1 be configured to be resisted against two supporting parts (2125, 2126) when lateral edge (2127,2128), with the lateral edges (2127,2128) of two supporting parts (2125,2126) it Between limit formed four engagement cavities 2262.The quantity of the binding cavity 2262 of formation can be set according to actual needs, such as It can be two basic change chamber, three binding cavities or more binding cavity.

Referring to Fig. 8, matching locating piece 223 has four the second convex blocks 2236 corresponding with four engagement cavities 2262, the Two convex blocks 2236 and the first convex block (2234,2235) are located at the same surface of pairing locating piece 223, and the second convex block 2236 is arranged to It is bonded in latched position in engagement cavity 2262, and is disengaged chamber 2262 when being detached from latched position.Second convex block 2236 Height less than the first convex block (2234,2235) height.The shape and binding cavity 2262 of second convex block 2236 cooperate.

In one embodiment, locking mechanism 22 further includes being arranged in first sliding groove 2121 and being located at steering column assembly Elastic piece structure (not shown) between 1 and angle limit block 226.Elastic piece structure is arranged in latched position by crowded Pressure, so that angle limit block 226 be made to move along the axial direction of adjustment axis 221 towards steering column assembly 1, elastic piece structure exists Restore deformation when being detached from the latched position, thus make angle limit block 226 along adjustment axis 221 axial direction away from Steering column assembly 1 is mobile, and then is disengaged from locating piece with pairing locating piece.

Therefore, the locking of locking system 2 and disengaging locking process carry out as follows：

In latched position, the rotation of operation handle 225 drives cam bit to rotate together, and cam bit 224 is in pairing locating piece It is slided in 223 track groove 2232, slides into the thicker position of thickness from the position of thinner thickness, to make to match locating piece 223 extruding force is gradually increased, until the first convex block 2235 of pairing locating piece 223 is mutually nibbled with the tooth socket in first sliding groove 2121 It closes, and the second convex block 2236 for matching locating piece 223 is bonded between angle limit block 226 and lateral edge (2127,2128) In the engagement cavity 2262 of formation, elastic piece structure is compacted at this time.At this point, adjusting bracket 21 holds the second axle sleeve 13, the second axle sleeve tightly 13 hold the first axle sleeve 12 tightly, to limiting steering column assembly 1 in latched position.

In being detached from latched position, operation handle 225 is revolved according to the direction of rotation opposite with when entering latched position Turning, cam bit 224 rotates together under the drive of operation handle 225, thus slided in the track groove of pairing locating piece 223, The position thicker from thickness slides into the position of thinner thickness, is gradually reduced the extruding force for matching locating piece 223, and is located at the Elastic piece structure in one sliding slot 2121 restores deformation to squeeze angle limit block 226, makes angle limit block 226 along adjustment axis 221 axial directions squeeze pairing locating piece 223, match the first convex block (2234,2235) and first sliding groove 2121 on locating piece 223 Interior tooth socket 2124 is detached from, so that steering column assembly 1 be made to be detached from latched position, can be carried out at this time to steering column assembly 1 Axially and radially adjust.

1 adjustment process of steering column assembly, operation handle 225 are in releasing orientation, match the first convex block on locating piece 223 2235 with first sliding groove 2121 in tooth socket 2124 be in disengaged position, match locating piece 223 on the second convex block 2236 and angle The engagement cavity 2262 of limited block 226 is still in engagement state, and angle limit block 226 is still located in first sliding groove 2121, adjusts branch Frame 21 and the separated state of the second axle sleeve 13, at this point it is possible to steering column assembly 1 is dragged along axially and radially moving, thus Its gradient and length are adjusted.

1 Collapse of Concrete of steering column assembly, in collision 1 stress of steering column assembly be divided into axial compression power with radially upward Component.Axial compression power overcomes the frictional force turned between the second axle sleeve 13 and the first axle sleeve 12, along axial conquassation.Pairing positioning Wedge-shaped tooth engagement between part 223 and adjusting bracket 21 offsets radial component suffered by steering column assembly 1, guarantees steering column Component 1 is radial static.

Correspondingly, the present invention also provides a kind of vehicle, which includes above-mentioned locking system 2 and above-mentioned steering column Component 1, details are not described herein again.

According to the solution of the present invention, it is engaged by locating piece 2123 with pairing locating piece 223, thus will in the prior art 1 rotary motion of steering column assembly is merely constrained by planar friction power and relies instead upon engagement force between tooth, thus pole The earth increases the restraining force that angle change occurs for constraint steering column assembly 1, thus guaranteeing steering column assembly 1 in axial direction Except direction and radial direction are adjustable, while steering column upwarps movement when can also prevent collision.

In addition, the present invention, which is pursued by the way that simple structure is arranged, realizes the anti-function of upwarping.The locking system 2 structure letter It is single, without using the structure that structure is complicated, components are more, said effect can be realized using common a small amount of components Structure, to reduce costs to a certain extent.Also, since components are less, phase is lost in mechanical movement transmittance process To less, effect is very good, and reduces components maintenance rate.

So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes It is set to and covers all such other variations or modifications.

Claims

1. A locking device for a steering column assembly, characterized in that it comprises:

The adjustment bracket has a first sliding groove and a second sliding groove that are substantially opposite to each other and define a longitudinal adjustment path extending along the longitudinal direction, and a positioning member with a plurality of teeth is formed in the first sliding groove;

A locking mechanism, the locking mechanism includes an adjustment shaft used to connect with the steering column assembly and a matching locator arranged on the adjustment shaft, the adjustment shaft passes through the first sliding slot and the second sliding slot in sequence slot and configured to move along the longitudinal adjustment path with movement of the steering column assembly; and

The mating locator is configured to operably engage a locator in the first slot to lock the adjustment shaft thereby constraining the steering column assembly in a locked position, and is configured to operably engage with a The detent is disengaged to release the adjustment shaft to allow the steering column assembly to disengage from the locked position.

2 . The locking device of a steering column assembly according to claim 1 , wherein the locating member has a plurality of tooth grooves formed by the plurality of teeth, and the mating locating member has at least one The first protrusion engaged with the tooth groove.

3 . The locking device of a steering column assembly according to claim 2 , wherein the plurality of cogs are arranged at intervals along the longitudinal direction, and each of the cogs is aligned with the longitudinal direction. The direction extends in a substantially vertical direction.

4 . The locking device of a steering column assembly according to claim 2 , wherein when the locating member is disengaged from the mating locating member and the adjustment shaft moves along the longitudinal adjustment path, it allows The first protrusion is adjusted from being engaged with one of the tooth slots to being engaged with the other tooth slot.

5 . The locking device of a steering column assembly according to claim 1 , wherein the paired positioning member is configured to be rotatable around the adjustment shaft and movable along the adjustment shaft. 6 .

6. The locking device of the steering column assembly according to any one of claims 2-5, characterized in that, the locking mechanism further includes a locking device arranged on the adjusting shaft and abutting against the first slide An angle limiting block in the groove, the angle limiting block is arranged to allow contact with the steering column assembly.

7 . The locking device of the steering column assembly according to claim 6 , wherein the angle limiting block is configured such that when it abuts against the first sliding slot, it is in contact with the first sliding slot. 8 . At least one joint cavity is defined between the contacting surfaces of the grooves;

The matching positioning member has at least one second protrusion corresponding to the at least one engagement cavity, the second protrusion and the first protrusion are located on the same surface of the matching positioning member, the second The lug is configured to engage within the engagement cavity when in the locked position and disengage the engagement cavity when disengaged from the locked position.

8 . The locking device of the steering column assembly according to claim 7 , wherein the locking mechanism further comprises a locking mechanism disposed in the first sliding slot and located between the steering column assembly and the angle limiter. 9 . shrapnel structure between bit blocks,

The elastic sheet structure is configured to be pressed when in the locking position, so that the angle limiting block moves toward the steering column assembly along the axial direction of the adjustment shaft, and the elastic sheet structure is disengaged When the locking position is restored to deformation, the angle limiting block moves away from the steering column assembly along the axial direction of the adjustment shaft, thereby disengaging the locating member from the mating locating member engage.

9. A steering column assembly, characterized in that it comprises:

a steering shaft, one end of which is connected to the steering wheel of the vehicle for transmitting the steering force input by the steering wheel;

a first bushing radially engaged to said steering shaft;

a second bushing engaged to a locking device as claimed in any one of claims 1-8 and permitted to be constrained in or out of the locked position by said locking device; in

The second bushing is configured to hug the first bushing in the locked position, and the second bushing can move relative to the first bushing along the telescopic axis when the locked position is disengaged. Sliding telescopically, and driving the locking mechanism of the locking device to move together along the longitudinal adjustment path defined by the adjustment bracket.

10. A vehicle, characterized by comprising the locking device according to any one of claims 1-8 and the steering column assembly according to claim 9.