CN107571908A - Transfer - Google Patents

Abstract

The present invention provides transition device.The transfer possesses to upper set fasten the retention mechanism of holding by trapping.Under the tightening state of retention mechanism, the first teeth portion part of upper set side engages with the second teeth portion part of side of trapping.Second teeth portion part is by by the guide shaft (connecting member) that can be broken during secondary collision and trapping to form link.Retention mechanism fastening releasing state under by secondary collision when, integratedly abutted with upper set along the second holding section (driving part) of tubing string axial movement with the second teeth portion part in engagement releasing state, guide shaft is broken and is deformed impact absorbing member via the second teeth portion part and absorb and impact.

Description

Transfer

Technical field

The present invention relates to transfer.

Background technology

For the automobile steering pipe post of Japanese Unexamined Patent Application Publication 2011-516323 publications, the bearing unit in downside The adjustment unit of upside is configured between a pair of side plates.The retention mechanism tool fastened to above-mentioned a pair of side plates of bearing unit The standby fastening bolt for inserting above-mentioned side plate.Locking member is configured with above-mentioned fastening bolt.It is being fixed on the disconnected of adjustment unit Split on plate, be integrally formed with the object lock part engaged with above-mentioned locking member.In the fastening of retention mechanism, sticking department Part engages with object lock part, and adjustment unit is locked relative to the position of bearing unit.

By secondary collision under the tightening state (state that locking member engages with object lock part) of retention mechanism When, the adjustment unit of upside is slided relative to bearing unit.Thus, by object lock part, it is broken broken plate, will be by Impact absorbing during secondary collision.

However, secondary collision can not only produce under the tightening state of retention mechanism, also can be in the fastening solution of retention mechanism Except being produced under state (relieve locking member engage with object lock part state).On the other hand, in Japanese Unexamined Patent Application Publication 2011- In No. 516323 publications, under test section of the latch-release state, impact when receiving secondary collision can not be absorbed.Therefore, released in fastening Under state by secondary collision when, consider using the impact absorbing member separately set in addition with above-mentioned broken plate come absorb rush Hit.However, in this case, construction complicates.

The content of the invention

An object of the present invention is to provide one kind by simply constructing regardless of tightening state (even in fastening Under releasing state) it can also absorb transfer by impact during secondary collision.

It is characterised by possessing in the structure of the transfer of the mode of the present invention：Steering spindle, it can be along tubing string axle To flexible；Tubing string set, it include trapping and with above-mentioned chimeric upper set of trapping, by above-mentioned steering e axle supporting can to rotate, Can be along above-mentioned tubing string axial stretching during flexible adjustment；Retention mechanism, it carries out fastening guarantor by above-mentioned trap to above-mentioned upper set Hold；Impact absorbing member, it is supported and impacted by deforming to absorb by above-mentioned trap；First teeth portion part, itself and above-mentioned upper set Integratedly moved axially along above-mentioned tubing string；Second teeth portion part, it turns into and above-mentioned the when forming fastening by above-mentioned retention mechanism The engagement of one teeth portion part, when the fastening formed by above-mentioned retention mechanism releases, turn into the engagement of above-mentioned engagement releasing Releasing state；Connecting member, above-mentioned second teeth portion part and above-mentioned link of trapping can be broken by it when by secondary collision； And driving part, it can integratedly be moved axially with above-mentioned upper set along above-mentioned tubing string, and in the fastening of above-mentioned retention mechanism Under releasing state by secondary collision when, the driving part with above-mentioned engagement releasing state above-mentioned second teeth portion part Abut and be broken above-mentioned connecting member, and above-mentioned impact absorbing member is deformed by above-mentioned second teeth portion part, above-mentioned turn Be configured to device, under the tightening state of above-mentioned retention mechanism by secondary collision when, in the upper of above-mentioned engagement Stating the second teeth portion part is broken above-mentioned connecting member and deforms above-mentioned impact absorbing member.

Brief description of the drawings

According to the detailed description carried out referring to the drawings with embodiment, it is of the invention above-mentioned and more the characteristics of and Advantage can become more fully apparent, wherein identical reference is marked to identical element, wherein,

Fig. 1 is the schematical side view of the transfer of the first embodiment of the present invention.

Fig. 2 is the schematic isometric of the transfer of first embodiment.

Fig. 3 is Fig. 1 III-III sectional views.

Fig. 4 is the exploded perspective view of the transfer of first embodiment, mainly shows impact absorption mechanism and tooth locking The construction of mechanism.

Fig. 5 is the side view of the major part of the transfer of first embodiment, is mainly shown to impact absorption mechanism The construction supported.

Fig. 6 is impact absorbing member and the diagrammatic top view trapped in the first embodiment.

Fig. 7 is the stereogram of the construction on tooth locking mechanism periphery in the first embodiment.

Fig. 8 is Fig. 7 VIII-VIII sectional views, and the periphery for the guide shaft for showing to be broken during by secondary collision constructs.

Fig. 9 is Fig. 7 IX-IX sectional views, and (a) shows the engagement of tooth locking mechanism, and (b) shows tooth locking mechanism Engagement releasing state.

Figure 10 is the amplification stereogram of the second teeth portion part.

The sectional view of the construction on the periphery for the guide shaft that Figure 11 is broken when being by secondary collision.(a) it is Fig. 9 (a) XIa-XIa sectional views, (b) are Fig. 9 (b) XIb-XIb sectional views.

(a) is the stereogram of the second supporting member in first embodiment in Figure 12, and (b) is from other different from (a) The stereogram for the second supporting member that angle is seen, (c) are the rearviews of the second supporting member (from tubing string axially downside Figure).

(a) and (b) is the side view in partial cross-section of the construction on the periphery of tooth locking mechanism in first embodiment in Figure 13. (a) engagement (lock-out state) is shown, (b) shows engagement releasing state (test section of the latch-release state).

Figure 14 is that the construction on the periphery of the impact absorption mechanism from tubing string axially downside in first embodiment shows It is intended to.

Figure 15 is that the part by impact absorption mechanism during secondary collision in first embodiment under engagement is broken Split diagrammatic side view.

Figure 16 is the office by impact absorption mechanism during secondary collision under engagement releasing state in first embodiment Portion is broken diagrammatic side view.

(a) and (b) is the construction on the tooth locking mechanism periphery of the transfer of second embodiment of the present invention in Figure 17 Sectional view, (a) shows engagement (lock-out state), and figure (b) shows engagement releasing state (test section of the latch-release state).

Figure 18 is the schematic sectional view of the construction on the projection periphery of driving part in second embodiment.

In Figure 19 (a), (b) and (c) be respectively the present invention the three, the 4th and the 5th embodiment in by The sectional view of the construction on the periphery for the guide shaft being broken during secondary collision.

(a) and (b) is the side of the signal of the tooth locked configuration of the transfer of the 6th embodiment of the present invention in Figure 20 View, (a) show engagement (lock-out state), and (b) shows engagement releasing state (test section of the latch-release state), and (c) is to represent to nibble The schematic diagram for cutting the relation between direction and tubing string axial direction under conjunction state, (d) is to represent the cutting side under engagement releasing state To the schematic diagram of the relation between tubing string axial direction.

Embodiment

Hereinafter, the embodiment for embodying the present invention is illustrated with reference to the accompanying drawings.Fig. 1 is the first implementation of the present invention The diagrammatic side view of the transfer 1 of mode.It is the front side for the car body 2 for being provided with transfer 1 in Fig. 1, on the left of paper, paper Right side is the rear side of car body 2.It is the upside of car body 2 in Fig. 1, on the upside of paper, is the downside of car body 2 on the downside of paper.Fig. 2 is to turn to The stereogram of device 1.

Reference picture 1, transfer 1 mainly possess steering spindle 3, tubing string set 4, bottom bracket 5, bracket 6, retention mechanism 7, punching Hit absorbing mechanism 8 and tooth locking mechanism 9.The bearing of trend of steering spindle 3 is tubing string axial direction X.In one end 3a (pipes of steering spindle 3 Axis of a cylinder is to X upper end) it is linked with the handling maneuver such as steering wheel part 10.The other end 3b (tubing string axial direction X lower end) of steering spindle 3 Successively via universal joint 11, jackshaft 12 and universal joint 13, link with steering mechanism 14.Steering mechanism 14 is with being passed The handling maneuver rotation of handling maneuver part 10 accordingly make such as rack pinion machine of deflecting roller steering (not shown) Structure.

Steering spindle 3 has upper the axle 3U and lower axle 3L of tubular.Upper axle 3U and lower axle 3L are for example fitted together to by spline, serration is embedding Close and be fitted together in a manner of it relative can slide.Handling maneuver part 10 and upper axle 3U one end (tubing string axial direction X upper end) links. The moving along tubing string axial direction X formed by upper axle 3U relative to lower axle 3L, steering spindle 3 can stretch along tubing string axial direction X.This Place, tubing string axial direction X the upper side and lower side is referred to as tubing string axially upside XU and tubing string axial direction downside XL.

Tubing string set 4 is the ducted body extended along tubing string axial direction X.Tubing string set 4 includes upper set 15 and traps 16.Above set 15 is with energy Enough modes slided along tubing string axial direction X, which are embedded in, traps 16.Tubing string set 4 can stretch along tubing string axial direction X.Steering spindle 3 is inserted through In tubing string set 4, and it is to rotate by the supporting of tubing string set 4 via multiple bearings 17,18.Specifically, upper set 15 is via bearing 17 support upper axle 3U as that can rotate.Trap 16 via bearing 18 by lower axle 3L supportings can to rotate.

Above set 15 links via bearing 17 and upper axle 3U.16 are trapped via bearing 18 and lower axle 3L links.Therefore, upper set 15 16 moved relative to trapping along tubing string axial direction X.Thus, tubing string set 4 stretches together with steering spindle 3 along tubing string axial direction X.

Steering spindle 3 herein and the flexible of tubing string set 4 are referred to as " flexible, telescopic ".By handling maneuver part 10 Flexible adjust is referred to as by the flexible position adjustment on the X of tubing string axial direction formed.Bottom bracket 5 includes：It is fixed on consolidating for car body 2 Determine bracket 5A and being fixed on trap 16 tubing string axial direction X bottom movable bracket 5B.Movable bracket 5B is via edge and tubing string axle Energy is supported to the central shaft 5C of orthogonal X direction (left and right directions of car body 2, the direction orthogonal with paper in Fig. 1) extension Enough rotations.

Tubing string set 4 and steering spindle 3 can be rotated upwardly and downwardly centered on central shaft 5C.Rotation herein is referred to as " pitching ", Approximate above-below direction centered on central shaft 5C that is, moving direction are referred to as pitching direction Y.By handling maneuver part 10 The adjustment up and down formed by pitching is referred to as pitching adjustment.Pitching direction Y upside is represented with YU on the upside of pitching direction, with pitching side Pitching direction Y downside is represented to downside YL.

It is as shown in Fig. 2 suitable with the left and right directions Z of car body 2 with the direction that tubing string axial direction X and pitching direction Y both sides are orthogonal. Bracket 6 includes web 20 and a pair of side plates 19.A pair of side plates 19 across tubing string set 4 on left and right directions Z it is opposed.Web 20 is connected to each other by the upper end of a pair of side plates 19.It is overall as bracket 6 from the X of tubing string axial direction, formed to lower open mouth Flute profile.Web 20 have towards a pair of side plates 19 two sides extend part, using insert the part bolt (not shown), Web 20 is fixed on car body 2 (reference picture 1).Thus, bracket 6 is fixed on car body 2.

As shown in Fig. 2 in pitching groove 21 of a pair of side plates 19 formed with the arc-shaped centered on the central shaft 5C of pitching. Trapping 16 includes：Along tubing string axial direction X extensions slit 22 and be configured at by fastening part 23 a pair of both sides of slit 22.Slit 22 be formed at trap 16 tube axis of a cylinder to upside XU part.A pair by fastening part 23 be trap 16 tube axis of a cylinder it is upward Side XU part is across slit 22 and the part of tabular opposed on left and right directions Z.By the way that a pair are clamped by fastening part 23 And fastened, fastened by 16 pairs of upper sets 15 of trapping of flexibly undergauge.

Fig. 3 is Fig. 1 III-III sectional views.As shown in figure 3, a pair of side plates 19 of bracket 6 includes outer surface respectively 19a and inner surface 19b.It is respectively formed with by fastening part 23 at a pair and is penetrated on left and right directions Z by fastening part 23 by justifying The axle inserting hole 24 that hole is formed.A pair as tabular outer surface 23a and inner surface 23b is included by fastening part 23 respectively. It is respectively opposed with the inner surface 19b of the corresponding side plate 19 in bracket 6 by the outer surface 23a of fastening part 23.

It is partially provided with the circumferential of outer peripheral face 15a of upper set 15 in the tubing string axial direction X (sides orthogonal with paper in Fig. 3 To) on prescribed limit in extend parallel to each other a pair of flat part 15b.Locking mechanism 9 with teeth is fixed in a flat part 15b Tabular the first teeth portion part 60.The end face 60a of (left and right directions Z's) both sides of the first teeth portion part 60 is fastened with a pair respectively The inner surface 23b in portion 23 is close to opposed.

In flexible adjustment, a pair of inner surface 23b by fastening part 23 via the first teeth portion part 60 a pair of end faces 60a, the movement to the tubing string axial direction X of upper set 15 are guided, and upper set 15 is carried out relative to the rotation for 16 formation of trapping Limitation.Next, retention mechanism 7 is illustrated.Retention mechanism 7 is for turning to finishing pitching adjustment and flexible adjustment The mechanism for being locked or being unlocked to the position of control member 10 (reference picture 1).

Retention mechanism 7 includes：Fastener shaft 25, action bars 26, ring-type cam 27, as ring-type cam follower one Individual secure component 28, nut 29, another secure component 30 and plant part 31.Cam 27, secure components 28, a spiral shells Mother 29, another secure component 30 and plant part 31 are supported by the periphery of fastener shaft 25.Fastener shaft 25 is by being inserted through pop-up The pitching groove 21 of the biside plate 19 of frame 6 and trap 16 two by the axle inserting hole 24 of fastening part 23 bolt form.Fastener shaft 25 Supported by biside plate 19.Being arranged at the head 25a in the big footpath of one end of fastener shaft 25, be fixed to can be with the one of action bars 26 Rotation.

Cam 27 and cam follower (secure component 28) are located in the head 25a and a side plate 19 of fastener shaft 25 Between, form and the operation moment of torsion of action bars 26 is converted into the axial force of fastener shaft 25 (for being fastened to a pair of side plates 19 Fastening force) power switching mechanism.Cam 27 is linked with action bars 26 in a manner of it can rotate integrally, and it is in fastener shaft 25 The movement relative to fastener shaft 25 on the central axial that is, axial J of fastening is restricted.A cam follower (secure component 28) engaged with cam 27 in the form of cam, a side plate 19 is fastened.

One secure component 28 (cam follower) and another secure component 30 have：Corresponding side plate 19 respectively is entered Fastening plate portion 28a, 30a of row fastening and jut 28b, the 30b being fitted together to respectively with corresponding pitching groove 21.By each prominent Play portion 28b, 30b to be fitted together to what corresponding pitching groove 21 was formed, limit the rotation of each secure component 28,30.Two secure components 28, 30 are supported by fastener shaft 25 as that can be moved along axial J is fastened.

The threaded portion 25b screw threads of nut 29 and the other end of fastener shaft 25 coordinate.It is tight that plant part 31 is located in another Gu between part 30 and nut 29.Planting part 31 includes packing ring 32 and needle bearing 33.Along with action bars 26 towards lock side Rotation, cam 27 rotates relative to a secure component 28 (cam follower).Thus, a secure component 28 is along fastener shaft Moved to J, between two secure components 28,30 (fastening plate portion 28a, 30a), a pair of side plates 19 of bracket 6 is clamped and Fastened.

Thus, each side plate 19 of bracket 6 is fastened to trapping corresponding to 16 by fastening part 23.As a result, pass through Each side plate 19 and the corresponding friction clamping force by between fastening part 23, limitation trap 16 the movement on the Y of pitching direction, so as to Realize that pitching locks.By the way that two are fastened by fastening part 23, make to trap 16 tube axis of a cylinder to upside XU part to upper set 15 Fastened.Thus, by the friction clamping forces between two sets 15,16, the movement in tubing string axial direction X of set 15 in limitation, It is flexible so as to realize.

Fig. 4 is the signal exploded perspective view of impact absorption mechanism 8 and tooth locking mechanism 9.As shown in figure 4, impact absorbing machine Structure 8 possesses impact absorbing member 40 and guiding limiting mechanism 50.Movement and deformation when by secondary collision of impact absorbing member 40 And impacted when absorbing by secondary collision.Guiding limiting mechanism 50 guides limit to the movement and deformation of impact absorbing member 40 System.Impact absorbing member 40 includes a pair of first plate portions 41, a pair of second plate portions 42, a pair of reflex parts 43 and move portion 44. A pair of first plate portions 41 have by fixed part 45 and predetermined deformation portion 46.

A pair of first plate portions 41 of impact absorbing member 40 via corresponding reflex part 43 and with corresponding second plate portion 42 Link.Move portion 44 plays function as by the tubing string axial direction X of the second plate portion 42 lower end linking part connected to each other.By During secondary collision, as the move portion 44 of linking part, integratedly to tubing string, axially downside XL is moved with upper set 15.Tooth locking mechanism 9 include the first teeth portion part 60, the second teeth portion part 70, guiding mechanism 80 and link gear 90.First teeth portion part 60 is fixed on Set 15.Second teeth portion part 70 engages with the first teeth portion part 60.Guiding mechanism 80 guides to the second teeth portion part 70.Link gear 90 make the motion of the second teeth portion part 70 be linked with the rotation of fastener shaft 25.

The guiding limiting mechanism 50 of impact absorption mechanism 8 includes a pair of guiding limitation faces 51 and guiding limiting part 52.One First teeth portion part 60 is arranged to guiding limitation face 51, it is close and opposed with a pair of second plate portions 42 on the Y of pitching direction.First A pair of guiding limitation face 51 and tubing string axial direction X of teeth portion part 60 are extended parallel to.When by secondary collision, a pair of guiding limitations The second plate portion 42 integrally moved with move portion 44 is accepted in face 51, so as to the second plate portion 42 relative to the first plate portion 41 towards pipe Axis of a cylinder guides to moving in parallel for downside XL.In other words, when by secondary collision, a pair of guiding limitation faces 51 will be in pipe The second plate portion 42 that axis of a cylinder increases to the length on X maintains parallel with the first plate portion 41, and to move portion 44 towards tubing string axle Movement to downside XL guides.

Limiting part 52 is guided to include a pair of guiding restriction plates 53 and linking part 54.Linking part 54 includes upper plate 541 and one To side plate 542, turn into the flute profile to lower open mouth.A pair of guiding a pair of opening ends of the restriction plate 53 from the linking part 54 as flute profile Extend to two sides (left and right directions Z).Fig. 5 is the side view of the major part of transfer 1, and is mainly shown to impact absorbing The construction that mechanism 8 is supported.As shown in Figures 4 and 5, a pair of guiding restriction plates 53 of limiting part 52 are guided to be configured to distinguish It is parallel with corresponding guiding limitation face 51.A pair of guiding restriction plates 53 are configured to respectively from outer side covers impact absorbing member 40 Corresponding first plate portion 41.

Each guiding restriction plate 53 has upper end 53a and lower end 53b on the X of tubing string axial direction.As shown in figure 5, each guiding limit Making sheet 53 has outer surface 53d and covers surface that is, the inner surface 53c of 16 sides (side of impact absorbing member 40) on the lower.Such as Fig. 4 institutes Show, it is each guiding restriction plate 53 lower end 53b formed with towards lateral foreign side stretch out by fixed part 53e.Each by fixed part 53e Formed with screw insertion hole 53f.

A pair of first plate portions 41 of impact absorbing member 40 via corresponding reflex part 43 and with corresponding second plate portion 42 Link.Move portion 44 (linking part) Z in left-right direction in a manner of the tubing string axial direction X of the second plate portion 42 lower end is connected to each other Extension.When by secondary collision, integratedly to tubing string, axially downside XL is moved move portion 44 with upper set 15.A pair of first plate portions 41 extend parallel to tubing string axial direction X.A pair of first plate portions 41 separate on left and right directions Z.A pair of second plate portions 42 and tubing string Axial X is extended parallel to.A pair of second plate portions 42 separate on left and right directions Z.Each first plate portion 41 is the same as corresponding second plate portion 42 separate on the Y of pitching direction.

Fig. 6 be impact absorbing member 40 and trap 16 diagrammatic top view.As shown in Figures 5 and 6, each first plate portion 41 has There are upper end 41a and lower end 41b on the X of tubing string axial direction.As shown in figure 5, each first plate portion 41 has outer surface 41d and covered on the lower The surface of 16 sides (side of impact absorbing member 40) that is, inner surface 41c.As shown in fig. 6, set in the lower end 41b of each first plate portion 41 Be equipped with by towards the extension that side is stretched out form by fixed part 45.It is each by fixed part 45 formed with screw insertion hole 45a.

As shown in figure 4, trap 16 than a pair by the tube axis of a cylinder of fastening part 23 to downside XL position, the two of slit 22 Side, there are a pair of wall portion 16c.A pair of wall portion 16c extend parallel to tubing string axial direction X, and prominent to YU on the upside of pitching direction. On the Y of pitching direction, a pair of wall portion 16c height is less than a pair of height by fastening part 23.Trapping 16 has by from a pair of wall portions A pair of fixed part 16e that 16c upper surface 16d (YU face on the upside of pitching direction) prominent boss is formed.In each fixed part 16e It is respectively formed with screwed hole 16f.

Shown in Fig. 5, a pair of fixed components 34 being made up of fixing screws are inserted corresponding to guiding limiting part 52 respectively Guide being fixed by the first plate portion 41 of fixed part 53e screw insertion hole 53f and impact absorbing member 40 of restriction plate 53 The screw insertion hole 45a in portion 45, be screwed into trap 16 fixed part 16e screwed hole 16f.That is, respectively guiding restriction plate 53 in pipe Axis of a cylinder is to the lower end 53b on X by fixed part 53e, the tubing string axial direction X of the first plate portion 41 corresponding with impact absorbing member 40 Lower end 41b by fixed part 45 16 be able to be fixed by being anchored on to trap together.

As shown in fig. 6, each first plate portion 41 includes the predetermined deformation portion that axially downside XL extends from upper end 41a to tubing string 46.For left and right directions Z width, predetermined deformation portion 46 includes small width portion 46a, big width portion 46b and change width Portion 46c.Small width portion 46a and upper end 41a is adjacent and has given width.Big width portion 46b and lower end 41b it is adjacent and with than Given width wide small width portion 46a.Change width portion 46c is located between small width portion 46a and big width portion 46b, with It is close to big width portion 46b sides and width is cumulative.

On left and right directions Z, formed with the slit 47 extended along tubing string axial direction X between a pair of first plate portions 41.Respectively draw Restriction plate 53 is led to configure in a manner of the first plate portion 41 corresponding to covering, it is each to guide restriction plate 53 right when by secondary collision First plate portion 41 towards YU on the upside of pitching direction movement are limited.In the present embodiment, it is upper when by secondary collision Near the end of the impact absorbing stroke of set 15, change width portion 46c turns back deformation, and impact absorbing load increases.In this implementation In mode, during by secondary collision, small width portion 46a and change width portion 46c form deformation of turning back but it is also possible to be Lian great Width portion 46b also forms deformation of turning back.That is, by each of small width portion 46a, big width portion 46b and change width portion 46c Length on comfortable tubing string axial direction X is set, and can change the impact suction by the impact absorbing member 40 during secondary collision Receive characteristic.

Tooth locking mechanism 9 is in order that (in other words, being by the initial restricted stability of telescopic direction during secondary collision The telescopic location of set 15 in the initial holding by secondary collision), and make tooth each other when forming fastening by retention mechanism 7 The mechanism of engagement.Fig. 7 is the stereogram of the construction on the periphery of tooth locking mechanism 9.Figure 13 (a) and (b) is tooth locking mechanism 9 Periphery construction side view in partial cross-section.Figure 13 (a) shows the engagement (lock-out state) of tooth locking mechanism 9.Figure 13 (b) shows engagement releasing state (test section of the latch-release state).

As shown in Fig. 4, Fig. 7 and Figure 13 (a), tooth locking mechanism includes the first teeth portion part 60, the second teeth portion part 70, drawn Lead mechanism 80 and link gear 90.First teeth portion part 60 is illustrated.As shown in figure 4, the first teeth portion part 60 passes through welding Etc. the flat part 15b for the outer peripheral face 15a that mode is fixed on upper set 15.The use of first teeth portion part 60 extends on the X of tubing string axial direction The plate of longer rectangular plate-like is formed.

First teeth portion part 60 is included in a pair of end face 60a (reference picture 3), tubing string axles on left and right directions Z (fastening axial J) To the upper end 60b on X and lower end 60c (reference picture 4), surface 60d and back side 60e (reference picture 3).Back side 60e is and surface The face of side opposite 60d and along it is upper set 15 flat part 15b.As shown in Figure 13 (a), the first teeth portion part 60 includes insertion Groove 61 and a pair of first denture 62L.Through slot 61 penetrates surface 60d and back side 60e, and extends along tubing string axial direction X.A pair One denture 62L is arranged in through slot 61.Above set 15 has the slit 15c for connecting with through slot 61 and extending along tubing string axial direction X.

As Suo Shi Fig. 4 and Figure 13 (a), through slot 61 have along tubing string axial direction X extend and on axial J is fastened it is right each other A pair of inner wall face put.Multiple first teeth 62 for being arranged on the X of tubing string axial direction are respectively formed with to internal face at this A pair of first denture 62L.As shown in figure 4, the tooth top of a pair of first denture 62L the first tooth 62 is right on axial J is fastened each other Put.The trace direction D (suitable with tooth width direction) of first tooth 62 is with the side orthogonal with tubing string axial direction X and the axial J both sides of fastening Depth direction extension of the formula along through slot 61.

A pair of guiding limitation faces 51 of the guiding limiting mechanism 50 of impact absorption mechanism 8 are on the surface of the first teeth portion part 60 It is configured at 60d on left and right directions Z (fastening axial J) across the both sides of through slot 61.First teeth portion part 60 can also pass through Bolt (not shown) etc. is fixed on the outer peripheral face of set 15.In addition, the first teeth portion part 60 can also be with upper set 15 by a kind of material It is integrally formed.

Next, the second teeth portion part 70 is illustrated.Figure 10 is the amplification stereogram of the second teeth portion part 70.Such as Figure 10 institutes Show, the second teeth portion part 70 includes main part 73 and tooth forming portion 75.Main part 73 has by carrier 71 and drive division 72.Tooth form Set with extending out into portion 75 from main part 73, with by the position that carrier 71 is spaced apart formed with the second tooth 74.Such as figure Shown in 13 (a), in side view (i.e. from left and right directions Z), main part 73 turns into the tabular of approximate quadrangle.Main part 73 include：Surface that is, upper surface 73a by YU on the upside of pitching direction, the surface by YL on the downside of pitching direction that is, lower surface 73b and opposed pairs side 73c (a side 73c is only shown in Fig. 4) on left and right directions Z.Formed in main part 73 There is the emptying aperture 78 being made up of the through hole for penetrating a pair of side 73c.

As shown in figure 14, main part 73 upper surface 73a with guiding limiting part 52 linking part 54 upper plate 541 it Between be provided with gap.Upper plate 541 is abutted by the upper surface 73a with main part 73 when by secondary collision, to the second teeth portion Part 70 to tubing string, axially downside XL moves the floating to be formed and limited.Limited in each side 73c of main part 73 with guiding The gap of ormal weight is provided between the corresponding side plate 542 of the linking part 54 of part 52.

As shown in Figure 13 (a), by carrier 71 by being arranged in the lower surface 73b of main part 73 under the X of tubing string axial direction The forniciform convex portion at end is formed.As shown in Figure 13 (a) and Figure 14, it is placed in by carrier 71 and is forming rushing for undertake part Hit on the continuing surface 44a (equivalent to upper surface) set by the move portion 44 of absorption piece 40, accepted by continuing surface 44a.Such as figure Shown in 13 (a), the energy of the position of contact is formed by the continuing surface 44a being formed on continuing surface 44a and by carrier 71 Enough fulcrum MS moved along tubing string axial direction X, the second teeth portion part 70 are supported for that can rotate.

Drive division 72 is disposed on the lower surface 73b of main part 73 stage portion, and towards the axial downside XL of tubing string.Driving The XU on the upside of tubing string axial direction of portion 72, it is spaced apart with by carrier 71.By the drive division 72 that stage portion is formed on the X of tubing string axial direction with The tubing string axial direction upside XU of move portion 44 end face is opposed.When by secondary collision, drive division 72 abuts with move portion 44, presses Press move portion 44 and be allowed to tubing string axially downside XL movements.

Tooth forming portion 75 is the plate-shaped member being extended in a manner of being protruded from the lower surface 73b of main part 73.Tooth form It is configured at into portion 75 than the tube axis of a cylinder of drive division 72 to upside XU.A pair of side 75a of tooth forming portion 75 have arrangement more respectively Individual second tooth 74 and formed a pair of second denture 74L.In Fig. 4 and Figure 13 (a) and (b), a side 75a is only illustrated The second denture 74L.

The outside side of the tooth top of a pair of respective second teeth 74 of second denture 74L opposite direction toward each other.Each second Denture 74L the second tooth 74 can engage from trace direction D with corresponding first denture 62L the first tooth 62.Such as Figure 13 (a) Shown, the second teeth portion part 70 includes the tabular being extended in a manner of in the slit 15c that 15 are covered from the insertion of tooth forming portion 75 Extended portion 76.When carrying out flexible adjustment, by extended portion 76 and the abutting of slit 15c inner surface, by the One teeth portion part 60 aligns with the second teeth portion part 70 on left and right directions Z.Thus, when the first tooth 62 engages with the second tooth 74, the One tooth 62 and the second tooth 74 easily form matching.

Next, guiding mechanism 80 is illustrated.As Suo Shi Fig. 4 and Figure 13 (a), guiding mechanism 80 includes guide shaft 81 With elongated hole 82.Guide shaft 81 is the insert axle of Z extensions in left-right direction.Elongated hole 82 is formed at the main part of the second teeth portion part 70 73, the inserting hole inserted for guide shaft 81.Guiding mechanism 80 is carried out on the direction for engaging and releasing engagement to the second teeth portion part 70 Guiding.Guide shaft 81 plays function as by the second teeth portion part 70 and the connecting member for 16 links of trapping.When by secondary collision, Guide shaft 81 as connecting member can be broken.Guide shaft 81 by being broken when by secondary collision, by the second teeth portion part 70 with Trap 16 link release.

In side view (from left and right directions Z), the direction that elongated hole 82 extends can be tooth lock-out state (engagement) Under along the first tooth 62 trace direction D direction or relative to the first tooth 62 trace direction D on tubing string axial direction Side XU or the tubing string axial direction downside inclined directions of XL.As shown in Figure 10, respectively the second teeth portion part 70 main part 73 one To on the 73c of side, on the upside of the tubing string axial direction on the upside of XU and pitching direction YU part, formed with recess 73d.The tubing string of elongated hole 82 Axially at upside XU edge part, recess 73d is configured at by the approximate half of YU on the upside of pitching direction.

For the part formed with recess 73d in main part 73, left and right directions Z width is less than the surplus of main part 73 The width of remaining part.Thus, the local width on left and right directions Z (the insertion direction of elongated hole 82) of the inner surface of elongated hole 82 Degree narrows.Fig. 9 is Fig. 7 IX-IX sectional views.Fig. 9 (a) shows the engagement of tooth locking mechanism 9.Fig. 9 (b) shows tooth The engagement releasing state of locking mechanism 9.Figure 11 (a) is Fig. 9 (a) XIa-XIa sectional views.Figure 11 (b) is Fig. 9 (b) XIb-XIb sectional views.

As shown in Figure 10, the inner surface of elongated hole 82 includes tubing string axially upside XU inner surface 82a and tubing string axial direction downside XL inner surface 82b.The tube axis of a cylinder of elongated hole 82 includes to upside XU inner surface 82a：With the second contact site 302, as disconnected Split the first contact site 301 of load changing unit.Under the engagement of tooth locking mechanism 9 shown in (a) in Figure 13, such as Fig. 9 (a) and shown in Figure 11 (a), the first contact site 301 contacts with guide shaft 81.Tooth locking mechanism 9 shown in (b) in Figure 13 is nibbled Close under releasing state, as shown in Fig. 9 (b) and Figure 11 (b), the second contact site 302 contacts with guide shaft 81.

As shown in Figure 11 (a) and (b), in the axial K of guide shaft 81, the first contact site 301 connects with what guide shaft 81 contacted Touch scope W1 and be less than the contact range W2 (W1 ＜ W2) that the second contact site 302 contacts with guide shaft 81.Thus, under engagement The breaking load of guide shaft 81 (insert axle) when by secondary collision is less than being touched by secondary under engagement releasing state The breaking load of guide shaft 81 when hitting.

That is, in the axial K of guide shaft 81, the roughly equal contact range W2 of width between a pair of predetermined fracture H with Guide shaft 81 forms the second contact site 302 of contact, mainly to bring shear strength to predetermined fracture H when by secondary collision Mode plays function.On the other hand, the first contact site 301 with less contact range W1 passes through when by secondary collision Shear strength is applied to predetermined fracture H and brings bending force, so as to as the fracture promotion division hair for accelerating the fracture of guide shaft 81 Wave function.

In other words, the first contact site 301 and the second contact site 302 be used as so that under engagement by secondary collision when Guide shaft 81 breaking load be different from engagement releasing state under the breaking load mode by the guide shaft 81 during secondary collision The breaking load changing unit changed to the breaking load of guide shaft 81 plays function.Fig. 8 is Fig. 7 VIII-VIII sectional views. As shown in Fig. 4 and Fig. 7, guide shaft 81 by the supporting member 100 for 16 supportings of trapping by being supported.Supporting member 100 includes first The supporting member 120 of supporting member 110 and second.First supporting member 110 by impact absorption mechanism 8 the structure of guiding limiting part 52 Into.Second supporting member 120 is by first supporting member 110 (suitable with guiding limiting part 52) supporting.Shown in Fig. 7 and Fig. 8, the Two supporting members 120 are configured at a pair by between fastening part 23.

As shown in figure 5, the guiding limiting part 52 as the first supporting member 110 is included by fixed part 53e and extension EZ (reference picture 7).16 are trapped being fixed on than a pair by fastening part 23 position from tube axis of a cylinder to downside XL by fixed part 53e. Extension EZ is configured at a pair and (guides limiting part 52 by the position between fastening part 23 from being extended to by fixed part 53e Upper end 52a).As shown in Figure 12 (a), (b), (c), the second supporting member 120 includes：Main part 130, a pair of insertion convex portions 140th, the first holding section 151, a pair of second holding sections 152 and a pair of support parts 160.Second supporting member 120 is by a kind of material Material (such as synthetic resin) is integrally formed.

As shown in figure 5, the first holding section 151 and the second holding section 152 and the first supporting member 110 that is, guiding limiting unit The tubing string axial direction X of part 52 upper end 52a engagings.As shown in Figure 12 (a)~(c), main part 130 includes：A pair of Hes of side frame 132 The upper ledge 131 of Z extensions in left-right direction.The YL extensions in downside from the both ends of upper ledge 131 to pitching direction of a pair of side frames 132.Main body Portion 130 is overall to turn into inverted U-shaped.A pair of insertion convex portions 140 are respectively to protrude from the outer surface 132a of corresponding side frame 132 Mode is extended.

First holding section 151 is axially extended by from upper ledge 131 towards tubing string in a manner of downside XL is protruded.A pair second Holding section 152 is axial towards tubing string with the bottom (by the part of YL on the downside of pitching direction) from corresponding insertion convex portion 140 respectively The mode that downside XL is protruded is extended.As Suo Shi Fig. 5 and Figure 12 (c), the tube axis of a cylinder of main part 130 is to downside XL end Face 130a and the tube axis of a cylinder of a pair of insertion convex portions 140 are connected to the tube of guiding limiting part 52 to downside XL end face 140a End face 52b of the axis of a cylinder to upside XU.Thus, the moving along tubing string axial direction X of the second supporting member 120 is limited.

As shown in figure 5, the first holding section 151 guiding limiting part 52 the upper end 52a on the X of tubing string axial direction at, with The engagings of the upper surface 54a (upper surface of upper plate 541) on the Y of pitching direction of linking part 54.A pair of second holding sections 152 are with drawing Lead the upper end 53a on the X of tubing string axial direction of a pair of guiding restriction plates 53 of limiting part 52 following table on the Y of pitching direction Face that is, inner surface 53c engagings.By the first holding section 151 and the second holding section 152, make guiding limiting part 52 in pitching side Clamped on to Y.Thus, the moving along pitching direction Y of the second supporting member 120 can be limited.

The first holding section 151 and the second holding section 152 of second supporting member 120, formed and rubbed with guiding limiting part 52 Wipe engaging.Second supporting member 120 is positioned by the clamping force that rubs relative to guiding limiting part 52 on left and right directions Z. As shown in figure 4, trap 16 a pair of lower ends on the X of tubing string axial direction by fastening part 23, form oriented tubing string axially downside Support slot 23c open XL.Support slot 23c is open at the outer surface 23a and inner surface 23b by fastening part 23.Vertical Shake on the Y of direction, the upper surface 16d that support slot 23c is arranged to than wall portion 16c is high.

As shown in figure 5, a pair of insertion convex portions 140 insert respectively it is corresponding by the support slot 23c of fastening part 23 and by it Support.Received together with the upper end 53a of corresponding second holding section 152 and corresponding guiding restriction plate 53 each insertion convex portion 140 It is contained in support slot 23c.Each support slot 23c inner surface 23d supports corresponding insertion convex portion 140 for that can be fastened along a pair The opposite direction of the fastening direction in portion 23 and fastening direction (in Fig. 5 the direction orthogonal with paper, and left and right directions Z) is slided.

Shown in (a), (b) such as Figure 12, a pair of support parts 160 is respectively with leaning on from the corresponding side frame 132 of main part 130 The mode that tubing string axial direction upside XU end face 132b is protruded is extended.A pair of support parts 160 on left and right directions Z by separating pair The arm for the tabular put is formed.As shown in figure 8, the main part 73 of the second teeth portion part 70 is configured at a pair of the second supporting member 120 Between support 160 and between a pair of side frames 132.

As shown in Figure 12 (a), in a pair of support parts 160 formed with for the chimeric support holes 163 of the press-in of guide shaft 81.Such as figure Shown in 8, a pair of end portions 81a in the axial direction of guide shaft 81 is loosely embedded in respectively is arranged at the corresponding pine by fastening part 23 Dynamic embedded hole 23e.That is, guide shaft 81 is guided the second of limiting part 52 (the first supporting member 110, reference picture 7) supporting Supporting member 120 positions.In flexible adjustment, in the case of just in case guide shaft 81 forms displacement, the loosening shown in Fig. 8 is fitted together to Hole 23e is limited the amount of movement of guide shaft 81.

A pair of support parts 160 includes outer surface 162 and pair of sliding guide surface 161.Pair of sliding guide surface 161 is by that This opposed inner surface is formed.Outer surface 162 is across gap S1 and corresponding 23b pairs of the inner surface by fastening part 23 Put.Gap S1 gap value is set as, a pair fastened when locking are occurred by the distance of fastening part 23 to each other Reduce, respectively also will not be with the opposed faces (side of opposed second supporting member 120 respectively by the inner surface 23b of fastening part 23 The outer surface 132a of frame 132 and the outer surface 162 of support 160) form interference.Therefore, in the locking of retention mechanism 7 When, the second supporting member 120, by it support guide shaft 81 will not from by fastening part 23 by load.

Corresponding side 73c is opposed with the main part 73 of the second teeth portion part 70 respectively for pair of sliding guide surface 161.A pair Sliding guidance face 161 is limited movement of the second teeth portion part 70 along guide shaft 81 axially (left and right directions Z), and engagement, Sliding guidance is carried out to the opposed side 73c of the main part 73 of the second teeth portion part 70 on the direction of engagement releasing.Guide shaft 81 is Resin-made, when by secondary collision, such as under the engagement of the first tooth 62 and the second tooth 74, due to from the second teeth portion part 70 The shock loading that is subject to and be broken.Specifically, guide shaft 81 in two predetermined fracture H-shaped into fracture, wherein above-mentioned two Individual predetermined fracture H is configured at corresponding side of the pair of sliding guide surface 161 each with the main part 73 of the second teeth portion part 70 Position between 73c.

Next, link gear 90 is illustrated.As shown in figure 4, link gear 90 includes force application part 170 and driving Part 180.As shown in Figure 13 (a), force application part 170 be to supported and guided by guiding mechanism 80 by fulcrum MS second Teeth portion part 70, towards the spring members that the engagement side engaged rotation force is formed with the first teeth portion part 60.Force application part 170 is to second Teeth portion part 70 presses force by carrier 71 to the continuing surface 44a of the move portion 44 of impact absorbing member 40.Driving part 180 Resist force application part 170 and drive the second teeth portion part 70 towards engagement side is released.

As shown in figure 4, driving part 180 includes the main part 182 of tubular and releases projection 184.Main part 182, which has, to be supplied Fastener shaft 25 can integrally rotatably insert chimeric embedded hole 181.It is prominent from the periphery 183 of main part 182 to release projection 184 Go out.As shown in Figure 13 (a), a pair of flat part 25c are formed in the periphery of fastener shaft 25, above-mentioned a pair of flat parts 25c is being fastened The periphery of axle 25 and a pair of parallel face is formed among each other.The inner peripheral surface of embedded hole 181 has to be engaged with a pair of flat part 25c A pair of flat parts.In addition, fastener shaft 25 and embedded hole 181 can also spline it is chimeric.

As shown in Fig. 4 and Fig. 7, force application part 170 includes：Second holding section 172, a pair first holding sections 171, Yi Jiyi To coil portion 173.A pair of first holding sections 171 16 engage with trapping.Second holding section 172 engages with the second teeth portion part 70.One To coil portion 173 at a pair of end portions in the axial direction of the main part 182 of driving part 180, the periphery of main part 182 is surrounded 183.A pair of coil portions 173 include one end 173a from tube axis of a cylinder to upside XU and tube axis of a cylinder to the another of downside XL respectively Hold 173b.

Each first holding section 171 is from one end 173a of corresponding coil portion 173 with orthogonal shape (in the lateral direction on Z Outside side) extension, and engaged with corresponding by engaging recessed part 23f of the fastening part 23 as holding section.As shown in fig. 7, Second holding section 172 is in a manner of connected to each other by the other end 173b of a pair of coil portions 173 from each other end 173b with therewith Orthogonal shape extension.As shown in Figure 13 (a), the upper surface 73a cards of the main part 73 of the second holding section 172 and the second teeth portion part 70 Close.

Rotation along with fastener shaft 25 towards latch-release direction, release projection 184 and be arranged at the second teeth portion part 70 The engaging protrusion 77 as holding section of main part 73 engages.Thus, projection 184 is released to resist force application part 170 and make second Teeth portion part 70 towards release engagement side swing offset.If make action bars 26 to locking direction [] in Figure 13 (b) counterclockwise Rotation process, the then shape shown in the state towards Figure 13 (a) shown in (b) of the driving part 180 together with fastener shaft 25 from Figure 13 State rotates counter-clockwise.

Thus, the releasing projection 184 of driving part 180 releases the engaging of the engaging protrusion 77 with the second teeth portion part 70. Therefore, force application part 170 makes the second teeth portion part 70 around fulcrum MS rotation drivings clockwise, and the second tooth 74 is from trace direction D is engaged [Figure 13 (a) reference] with the first tooth 62.Thus, can be achieved to lock the flexible locking formed by tooth.

If on the contrary, to action bars 26 to latch-release direction [] in Figure 13 (a) clockwise carry out rotation process, The then state shown in the state towards Figure 13 (b) shown in (a) of the driving part 180 together with fastener shaft 25 from Figure 13, around up time Pin rotates.Thus, the releasing projection 184 of driving part 180 pushes to the engaging protrusion 77 of the second teeth portion part 70.Therefore, Two teeth portion parts 70 are by the rotation driving counterclockwise centered on fulcrum MS, and the second tooth 74 is along trace direction D and the first tooth 62 separation, by engagement releasing [(b) of reference picture 13].Thus, the flexible locking that is formed will be locked by tooth to be released.

As shown in figure 4, transfer 1 possesses respectively a pair of ends position of the moving range of the upper set 15 during to flexible adjustment Put the first limiting mechanism 210 and the second limiting mechanism 220 limited.First limiting mechanism 210 is under in upper set 15 During the maximum elongation position that set 16 is stretched most long, the position on the X of tubing string axial direction of upper set 15 is limited.Second limitation machine Structure 220 is when upper set 15 is in and shortens position relative to 16 maximums for contracting most short of trapping, to upper set 15 on the X of tubing string axial direction Position limited.

First limiting mechanism 210 includes the first retainer 211 and the first holding section 212.First retainer 211 is held in Trap 16 it is corresponding with another secure component 30 by fastening part 23.First holding section 212 is integrally provided to the first teeth portion Part 60, in the state of upper set 15 is in above-mentioned maximum elongation position, the first holding section 212 engages with the first retainer 211.

First holding section 212 is the block of the integratedly prominent surface 60d for being formed at the first teeth portion part 60 cubic shaped.

It is corresponding tight with another secure component 30 that the insert of first retainer 211 is held in the insertion on left and right directions Z Gu the retaining hole 23g in portion 23.The part of first retainer 211 is from corresponding with another secure component 30 by fastening part 23 Side surface 23b is protruded, and in flexible adjustment, the surface 60d of the part of the first retainer 211 and the first teeth portion part 60, which is slided, to be connect Touch.Although not shown, but the first retainer 211 is at least local includes energized components, and in a manner of it can form energization and side plate 19 inner surface 19b contacts.First retainer 211 is formed with upper set 15 via the first teeth portion part 60 and contacted with being powered. Thus, upper set 15 and trap and 16 can be formed via the first retainer 211 and the first teeth portion part 60 and form connection with being powered.

For transfer 1, in order that the loudspeaker (not shown) for being arranged at handling maneuver part 10 are led with car body 2 It is logical, therefore, to assure that conductive path.However, in upper set 15 and trap between 16 and trapping between 16 and side plate 19, at these Be coated between part when being used to adjust pitching, flexible adjustment when slip smoothly lubricating grease (insulating properties) situation it is more. In this case, it is more difficult that conductive path is set between these parts.

Therefore, in the present embodiment, possess and the conducting position (the first teeth portion part 60) and side plate 19 on upper set 15 The conductive component (the first retainer 211) of contact.Thereby, it is possible to superior assembleability and ensure from handling maneuver part 10 successively via steering spindle 3, upper set 15, conductive component (the first retainer 211) and bracket 6 until the conductive path of car body 2 Footpath.First retainer 211 is held in retaining hole 23g, therefore will not be maximized and can be realized space saving.

Second limiting mechanism 220 includes the second retainer 221 and the second holding section 222.Second retainer 221 is arranged at The tube axis of a cylinder of the tooth forming portion 75 of two teeth portion parts 70 is to upside XU end face.The first teeth portion part is fixed in second holding section 222 60, and contract with the second retainer 221 to engage in the state of most short position in above-mentioned in upper set 15.In tooth locking mechanism 9 Under engagement by secondary collision when, it is upper set 15 be intended to relative to trap 16 towards on the downside of tubing string axial direction XL move when, be in The second teeth portion part 70 with being fixed on the upper engagement of the first teeth portion part 60 for covering 15, to what is supported by the second supporting member 120 Guide shaft 81 gives impulsive force.

Therefore, guide shaft 81 in Fig. 9 (a) and the predetermined fracture H-shaped of two positions shown in Figure 11 (a) into fracture. Along with the fracture of guide shaft 81, the second teeth portion part 70 departs from the supporting formed by the second supporting member 120, as shown in figure 15, the Two teeth portion parts 70 are in the state of being maintained and being engaged with the first teeth portion part 60, and towards tubing string, axially downside XL is moved together with upper set 15 It is dynamic.Thus, by the drive division 72 of the second teeth portion part 70, towards tubing string, axially downside XL is pressed the move portion 44 of impact absorbing member 40 Press and move.

Along with the movement of move portion 44, the one side of impact absorbing member 40 makes the position of reflex part 43 towards the axial downside of tubing string XL is moved while deforming, so that the length of the first plate portion 41 is reduced on the X of tubing string axial direction and the length of the second plate portion 42 increases.It is logical Crossing the deformation will be because by energy absorption caused by secondary collision.During by secondary collision, the guiding limit of guiding limiting part 52 Making sheet 53, not only to the first plate portion 41 float limited and to from the first plate portion 41 towards reflex part 43 turn back deform into Row guiding.When by secondary collision, the surface 60d of the first teeth portion part 60 guiding limitation face 51 is being turned back to the second plate portion 42 Heaving between portion 43 and move portion 44 limited and by make the second plate portion 42 and the first plate portion 41 it is approximately parallel in a manner of To being guided from reflex part 43 towards the deformation of the second plate portion 42.In other words, in the guiding restriction plate 53 of guiding limiting part 52 Between the guiding limitation face 51 of the first teeth portion part 60, the displacement of impact absorbing member 40 is guided.

The upper plate 541 of the linking part 54 of limiting part 52 is guided by the upper surface 73a of the main part 73 of the second teeth portion part 70 Towards tubing string axially downside XL guiding.The guiding limitation face 51 of first teeth portion part 60 by undertake the second teeth portion part 70 by carrier Towards tubing string, axially downside XL is guided 71 move portion 44.Thus, movement of the second teeth portion part 70 towards tubing string axial direction downside XL is guided.

On the other hand, when under the engagement releasing state of tooth locking mechanism 9 by secondary collision, upper set 15 is relative to trapping 16 move towards tubing string axial direction downside XL.If upper set 15 is moved to most short position of contracting to obtain, it is arranged at what is integrally moved with upper set 15 The second holding section 222 and the second retainer 221 of the second teeth portion part 70 in engagement releasing state on first teeth portion part 60 Collision is formed, impulsive force is given to the guide shaft 81 supported by the second supporting member 120.

Therefore, guide shaft 81 in Fig. 9 (b) and the predetermined fracture H-shaped of two positions shown in Figure 11 (b) into fracture. Along with the fracture of guide shaft 81, the second teeth portion part 70 departs from the supporting formed by the second supporting member 120, as shown in figure 16, with Above set 15 is together towards tubing string axially downside XL movements.Thus, the move portion 44 of impact absorbing member 40 passes through the second teeth portion part 70 Drive division 72 towards tubing string axially downside XL be pressed movement.As a result, impact absorbing member 40 deforms, absorbed by deforming By the energy formed by secondary collision.

In the present embodiment, under tightening state, during by secondary collision, the second teeth portion part 70 in engagement Make connecting member (guide shaft 81 as insert axle) fracture, further as shown in figure 15, impact absorbing member 40 is deformed and is inhaled Receive impact.In the case where fastening releasing state, during by secondary collision, driving parts (the second limitation machine for integrally being moved with upper set 15 Second holding section 222 of structure 220) abutted with the second teeth portion part 70 in engagement releasing state and make connecting member (guide shaft 81) Fracture, further as shown in figure 16, deform impact absorbing member 40 via the second teeth portion part 70 and absorb impact.In fastening shape With under fastening releasing state, being absorbed and being impacted using identical impact absorbing member 40 under state.That is, by simply constructing, no matter It is under tightening state, or in the case where fastening releasing state, is impacted when can absorb by secondary collision.

Driving part (the second holding section 222) play in the case where fasten releasing state with the second retainer 221 formation abut and The function of being limited the terminal position for adjusting range of stretching.Therefore, with being set and the second retainer independently of driving part The situation of 221 parts abutted is compared, and can simplify construction.In other words, be in upper set 15 16 contracts most relative to trapping During short most short position, above-mentioned driving part doubles as being limit the position on the X of tubing string axial direction of upper set 15 second Second holding section 222 of limiting mechanism 220.Therefore, it is possible to simplify construction.

By inner surface setting from the tube axis of a cylinder of the inserting hole (elongated hole 82) in the second teeth portion part 70 to upside XU it is disconnected Load changing unit (the first contact site 301, the second contact site 302) is split to play a role, can be in engagement (with retention mechanism Tightening state is suitable) between engagement releasing state (it is suitable that the fastening with retention mechanism releases state), change by secondary (the insert axle of guide shaft 81 during collision.Connecting member) breaking load.As above-mentioned breaking load changing unit, including the first contact site 301 and second contact site 302.That is, the first contact site 301 for contacting is formed with guide shaft 81 under engagement and in engagement releasing Formed under state with guide shaft 81 in the second contact site 302 for contacting, formed on the axial K of guide shaft 81 contact range of contact compared with That small contact site, make to be become easy by the bending of guide shaft during secondary collision 81, therefore the breaking load step-down of guide shaft 81.By This, can be under tightening state between fastening releasing state, to the breaking load progress by the guide shaft 81 during secondary collision Change.

Specifically, set by the tube axis of a cylinder of the elongated hole 82 in the second teeth portion part 70 to upside XU inner surface 82a Fracture promotion division (the first contact site 301) play a role, under engagement (suitable with the tightening state of retention mechanism 7) by Breaking load to the guide shaft 81 (insert axle) during secondary collision is less than in (the non-fastening with retention mechanism 7 of engagement releasing state State is suitable) under by secondary collision guide shaft 81 breaking load.On the other hand, under engagement, touched by secondary When hitting, in the breaking load of guide shaft 81,16 there is the load that force of sliding friction is formed during sliding friction relative to trapping in upper set 15 Lotus, which turns into, departs from load.It is (non-tight with engagement releasing state therefore, it is possible to suppress the disengaging load under engagement (tightening state) Solid fraction state) under disengaging load between difference.

At inner surface 82a of the tube axis of a cylinder to upside XU of the elongated hole 82 of the second teeth portion part 70, under engagement with The contact range W1 that guide shaft 81 forms the first contact site 301 (fracture promotion division) of contact is less than under engagement releasing state with leading Axle 81 forms the contact range W2 (W1 ＜ W2) of the second contact site 302 of contact.As a result, by secondary under engagement The bending of guide shaft 81 becomes easy during collision, and being less than engagement by the breaking load of the guide shaft 81 during secondary collision under engagement solves Except under state by the breaking load of the guide shaft 81 during secondary collision.

In addition, the modification as present embodiment, although not shown, but can enumerate the contact model of the second contact site 302 The contact range W1 that W2 is less than the first contact site 301 is enclosed, under engagement releasing state (suitable with the non-tightening state of retention mechanism 7) By the guide shaft 81 during secondary collision breaking load be less than engagement (suitable with the tightening state of retention mechanism 7) under by The example of the breaking load of guide shaft 81 (insert axle) during secondary collision.Contact site (the first contact site of this small side of contact range 301 and second any one of the contact site 302) can also be by the top shape for the projection for being arranged at elongated hole 82 (inserting hole) inner surface Into.

As shown in Figure 13 (a), the second teeth portion part 70 is by can be along fulcrum MS that tubing string axial direction X is moved supporting for can The structure of rotation, wherein fulcrum MS are formed at the continuing surface 44a and second teeth portion of receiving member (impact absorbing member 40) The position being in contact by carrier 71 of part 70.Therefore, assembling when, can by by the second teeth portion part 70 by carrier 71 The continuing surface 44a of receiving member (impact absorbing member 40) operation is placed in form the fulcrum MS that can be moved.Therefore, no Need that the support shaft as the pivot of teeth portion part is inserted through into this cumbersome operation of support holes as in the past, so as to group Dress property improves.

Receiving member doubles as impact absorbing member 40, therefore can simplify construction.As shown in figure 8, by secondary collision When form the guide shaft 81 of fracture being fastened by retention mechanism 7 and leave a pair in left and right directions Z top offsets by fastening part 23 Under state, supported by a pair of support parts 160 of the second supporting member 120.A pair of support parts 160 is arranged at by extension EZ branch The second supporting member 120 held, wherein extension EZ from as shown in Figure 5 than a pair by the tube axis of a cylinder of fastening part 23 to downside XL opening position, which is fixed on to trap, 16 is extended up to a pair as shown in Figure 7 by fixed part 53e by between fastening part 23.

Therefore, when by secondary collision, guide shaft 81 is due to from the difference band for being not affected by a pair of displacements by fastening part 23 The load load of a pair of support parts 160 of the influence come and fracture is formed under stable breaking load.Therefore, by secondary During collision, the impact-absorbing characteristics that can be stablized.A pair of support parts 160 is included to the main part 73 of the second teeth portion part 70 A pair of side 73c carry out the pair of sliding guide surface 161 of sliding guidance.When by secondary collision, pass through a pair of support parts 160 Sliding guidance face 161 limit movement of the second teeth portion part 70 in the axial direction of guide shaft 81, therefore when by secondary collision, Guide shaft 81 is broken under more stable breaking load.Thus, when by secondary collision, the impact absorbing that can be stablized is special Property.Figure 17 (a), (b) are the section views of the construction on the tooth locking mechanism periphery of the transfer of second embodiment of the present invention Figure, Figure 17 (a) show lock-out state (engagement), and Figure 17 (b) shows test section of the latch-release state (engagement releasing state).

Shown in (a), (b) such as Figure 17, second embodiment and first embodiment main difference are as described below.That is, use In the second limiting mechanism 720 that the terminal position (most shortening position) of the flexible adjusting range to upper set 15 is limited by second The holding section 722 of retainer 721 and second is formed.Second retainer 721 is arranged at the driving of link gear 90P engagement releasing Part 180P.Second holding section 722 is the driving part for making to be driven by the impact absorbing member 40 during secondary collision.

Second retainer 721 has stop surface 723.Second holding section 722 is fixed integrally to the first teeth portion part 60.Second The XL on the downside of tubing string axial direction of holding section 722 end has the snap-latch surface 724 engaged with the stop surface 723 of the second retainer 721. The snap-latch surface 724 of second holding section 722 is formed at relative to the inclined inclined planes of tubing string axial direction X.As shown in Figure 17 (b), Under engagement releasing state, the stop surface 723 of the second retainer 721 is relative to tubing string axial direction X directions and the opposite direction of snap-latch surface 724 With with the identical inclined at inclination angles of snap-latch surface 724.

As shown in Figure 17 (b), the second holding section 722 as driving part under engagement releasing state with the second stop Portion 721 is abutted, and thus the terminal position (most shortening position) of the flexible adjusting range of upper set 15 is limited.Now, stop The direction of the normal of face 723 and snap-latch surface 724 is towards the center (that is, driving part 180P pivot) of fastener shaft 25.

Therefore, will not be from the second engaging when the terminal position (most shortening position) to adjusting range of stretching limits Torque is brought to the driving part 180P for releasing engagement and causes driving part 180P postural changes in portion 722 (driving part). When limiting terminal position (most shortening position), postural change, therefore the second teeth portion part do not occur for driving part 180P 70 postural change does not occur, therefore, will not bring load to guide shaft 81 because of impact when limiting.In addition, will not because limitation when Impact and make the postural change of action bars 26.

Driving part 180P and fastener shaft 25 are chimeric in a manner of it can rotate integrally.Second retainer 721 is by drive division The part for being configured at the projection 185 with releasing the opposite side of projection 184 in part 180P relative to fastener shaft 25 is formed.It is specific and Speech, projection 185 include base portion 186, fracture 187 and the second above-mentioned retainer 721.Base portion 186 is integratedly linked to master The periphery 183 in body portion 182.Fracture 187 is configured between the retainer 721 of base portion 186 and second.That is, the second retainer 721 passes through Linked by fracture 187 and base portion 186.

When under fastening releasing state (engagement releasing state) by secondary collision, fracture 187 is due to as drive division Second holding section 722 of part is formed with the second retainer 721 to abut and is broken.Such as the schematic sectional view such as the periphery of projection 185 Shown in Figure 18, along tubing string axial direction X in the state of engagement releasing of the fracture 187 by making the second teeth portion part 70 in driving part 180P The bottom of the groove 188 of extension and formed.By the bottom (fracture 187) of groove 188, in driving part 180P, by the second stop Portion 721 is connected with base portion 186.

As shown in Figure 17 (a), the second retainer 721 is avoided being used as driving when by secondary collision under engagement The mobile route of second holding section 722 of part.In the present embodiment, it is right under engagement releasing state as shown in Figure 17 (a) The second retainer 721 that the terminal position of flexible adjusting range is limited avoid under engagement (tightening state) by The mobile route of second holding section 722 (driving part) during secondary collision.Therefore, under tightening state, by secondary collision When, the second holding section 222 (driving part) does not abut with the second retainer 721.Therefore, under tightening state, by secondary During collision, identical impact-absorbing characteristics can be independently obtained with flexible adjustment position.

As shown in Figure 17 (b), in the case where fastening releasing state, when by secondary collision, the second holding section 722 and second Retainer 721 abuts, and fracture 187 is broken and produces impact absorbing load.Therefore, the fracture by setting fracture 187 carries Lotus, can in the desired manner, set fastening releasing state under by disengaging load during secondary collision.Stop due to second Dynamic portion 721 comes off along with breaking to form for fracture 187, can allow the second holding section 722 (driving part) towards the second teeth portion The movement of the side of part 70, therefore impact absorbing member 40 can be made to contribute to by impact absorbing during secondary collision.

In addition, as fracture 187, as long as being provided with the relatively thin frangible portion of the neighbour part wall thickness connect.Though do not scheme Show, but the second holding section 722 can also be integrally formed in the first teeth portion for example, by forming tongue piece and boosting tongue piece etc. Part 60 or upper set 15.Figure 19 (a), (b) and (c) is respectively in the three, the 4th and the 5th embodiment of the present invention By the sectional view of the construction on the periphery for the guide shaft 81 that fracture is formed during secondary collision.

In the 3rd embodiment shown in (a) in Figure 19, elongated hole 82 (inserting hole) tube axis of a cylinder to upside XU's Inner surface 82a is provided with the dashing forward as fracture promotion division (breaking load changing unit) with the top 401 abutted with guide shaft 81 Play 400.The top 401 of projection 400 is configured at inner surface 82a central portion on the axial K of guide shaft 81.The top of projection 400 As long as 401 can connect as being used as in first embodiment~second embodiment in the first contact site 301 and the second contact site 302 That narrower contact site of tactile scope plays function like that.In the third embodiment, under engagement by two During secondary collision, the top 401 as the projection 400 of fracture promotion division abuts with guide shaft 81 and accelerates to occur stress concentration, so as to Accelerate by cutting the cut-out (fracture) formed.

In the 4th embodiment shown in (b) in Figure 19, elongated hole 82 (inserting hole) tube axis of a cylinder to upside XU's Inner surface 82a is provided with a pair as fracture promotion division (breaking load changing unit) being spaced apart on the axial K of guide shaft 81 Projection 500.As long as the top 501 of a pair of projections 500 can be as in first embodiment~second embodiment, connecing as first That narrow contact site of contact range in the contact site 302 of contact portion 301 and second plays function like that.Implement the 4th In mode, under engagement by secondary collision when, as fracture promotion division a pair of projections 500 top 501 with leading Axle 81 abuts and accelerates to be formed stress concentration, so as to accelerate by cutting the cut-out (fracture) formed.

In the 5th embodiment shown in (c) in Figure 19, in guide shaft 81 formed with as fracture promotion division (breaking load Changing unit) breach 600.Breach 600 turns into such as section V-shaped, is formed at the part in the circumferential of the periphery of guide shaft 81 Or all.Breach 600 is on the axial K of guide shaft 81, the middle position that is configured between a pair of support parts 160.Breach 600 If can as the guide shaft 81 of first embodiment~second embodiment periphery at, be configured at the first contact site 301 and That narrow contact site of contact range in second contact site 302 position opposed (in example illustrated, the first contact site 301) The opposite side put.In the 5th embodiment, under engagement by secondary collision when, by be used as fracture promote The breach 600 in portion, accelerate the stress concentration of guide shaft 81, so as to accelerate by cutting the cut-out (fracture) formed.

In addition, in the construction of (a), (b) in Figure 19, the breach of Figure 19 (c) can also be set.Figure 20 (a), (b) It is the side view of the signal of the tooth locked configuration of the transfer of the 6th embodiment of the present invention, (a) shows engagement (lock Determine state), (b) shows engagement releasing state (test section of the latch-release state).

Shown in (a), (b) such as Figure 20, the second teeth portion part 70Q has unique second tooth 74, engaging protrusion 77 and example The inserting hole 82Q being such as made up of circular hole.Via supporting device inserting hole 82Q is inserted through by the insert axle 81Q for supporting of trapping.Second Teeth portion part 70Q in a manner of insert axle 81Q rotations can be supported.Second teeth portion part 70Q is along with around insert axle 81Q's Rotation, changes between engagement and engagement releasing state.Insert axle 81Q is formed by resin, is broken when by secondary collision Split.

Protruded in inserting hole 82Q inner surface 82Qa formed with projection 800, the projection 800 is as by secondary collision When by cut make insert axle 81Q cut-out (fracture) breaking load changing unit.During by secondary collision, the top of projection 800 801 abut with insert axle 81Q, insert axle 81Q is cut off (fracture) by cutting.Projection 800 is also used in Figure 20 (a) institute Cutting under the engagement releasing state shown in engagement and Figure 20 (b) shown.For example, in engagement and engagement releasing shape In the case of any of state state [engagement of Figure 20 (a) in the present embodiment], projection 800 is configured at substantially in pipe Axis of a cylinder is to opposed with inserting axle 81Q center C1 position on X.Another state in engagement and engagement releasing state In the case of [in the present embodiment, the engagement releasing state of Figure 20 (b)], projection 800 is configured at relative to tubing string axial direction X The position opposed with inserting axle 81Q center C1 on inclined direction.

Therefore, when by secondary collision, the projection 800 under the engagement shown in Figure 20 (c) cuts insert axle 81Q Cutting direction U1 and tubing string axial direction X angulations θ 1 cut with the projection 800 under the engagement releasing state shown in Figure 20 (d) Disconnected insert axle 81Q cutting direction U2 is different from tubing string axial direction X angulations θ 2.Any one of angle, θ 1 and angle, θ 2 Can be zero.

In the present embodiment, it is (tight in engagement (tightening state) and engagement releasing state when by secondary collision Admittedly release state) under, cutting direction U1, U2 that projection 800 cuts insert axle 81Q are different, therefore insert axle 81Q breaking load It is different.Axle 81Q breaking load is inserted during thereby, it is possible to under tightening state and fastening releasing state by secondary collision Changed.The present invention is not limited to each above-mentioned embodiment, for example, the second tooth 74 of the second teeth portion part 70 it can also be provided that One.

As long as the fracture promotion division of the breaking load changing unit of the present invention can appoint in engagement and engagement releasing state Function is played under one state.In other words, as long as in order to set engagement and engagement releasing shape according to design Breaking load under state and fracture promotion division is set.Fig. 9 a pair of loosening embedded holes by fastening part 23 can also be cancelled 23e.In this case, although not shown, but each end 81a of guide shaft 81 and a pair of corresponding inner surface 23b by fastening part 23 It is opposed in a manner of interval as defined in separating on the axial K of guide shaft 81.

The present invention is not limited to form the handling maneuver of handling maneuver part 10 transfer of the manual type of auxiliary, It can also apply to what the power of electro-motor was given steering spindle 3 and the handling maneuver of handling maneuver part 10 is aided in Electric power-assisted steering apparatus.In addition, the present invention can implement various changes in the range of claims record.

This application claims the Japanese patent application proposed on July 5th, 2016 No. 2016-133535 and 2016 11 The priority of months 18 days Japanese patent applications the 2016-225355th proposed, and be hereby incorporated including specification, accompanying drawing and The full content of specification digest.

Claims (8)

1. a kind of transfer, possesses：

Steering spindle, it can be along tubing string axial stretching；

Tubing string set, it include trapping and with the chimeric upper set of trapping, by the steering e axle supporting can to rotate, flexible Can be along the tubing string axial stretching during adjustment；

Retention mechanism, it carries out fastening holding by described trap to the upper set；

Impact absorbing member, it is supported and impacted by deforming to absorb by described trap；

First teeth portion part, it is integratedly moved axially with the upper set along the tubing string；

Second teeth portion part, it turns into the engagement shape engaged with the first teeth portion part when forming fastening by the retention mechanism State, when the fastening formed by the retention mechanism releases, turn into the engagement releasing state of the engagement releasing；

Connecting member, the second teeth portion part and the link of trapping can be broken by it when by secondary collision；And

Driving part, it can integratedly be moved axially with the upper set along the tubing string, and in the fastening of the retention mechanism When under releasing state by secondary collision, the driving part supports with the second teeth portion part in the engagement releasing state Connect and be broken the connecting member, and the impact absorbing member is deformed via the second teeth portion part, its feature exists In,

Also, when under the tightening state of the retention mechanism by secondary collision, described second in the engagement Teeth portion part is broken the connecting member and deforms the impact absorbing member.

2. transfer according to claim 1, wherein, it is further equipped with：

Retainer, its be arranged at it is described trap or the part by the supporting of trapping,

The driving part under the engagement releasing state with the retainer by abutting, the flexible adjustment to the upper set The terminal position of scope is limited.

3. transfer according to claim 2, wherein,

The retainer is configured to avoid under the engagement by the mobile road of driving part during secondary collision Footpath.

4. transfer according to claim 2, wherein,

It is described to trap or the retainer, the wherein fracture are connected via fracture by the part of the supporting of trapping Because forming fracture the abutting of the driving part and the retainer when under the engagement releasing state by secondary collision,

By the retainer because the fracture of the fracture comes off and what is formed, it is allowed to which the driving part is towards second tooth Component side moves.

5. transfer according to claim 3, wherein,

It is described to trap or the retainer, the wherein fracture are connected via fracture by the part of the supporting of trapping Because forming fracture the abutting of the driving part and the retainer when under the engagement releasing state by secondary collision,

By the retainer because the fracture of the fracture comes off and what is formed, it is allowed to which the driving part is towards second tooth Component side moves.

6. according to transfer according to any one of claims 1 to 5, wherein,

In the second teeth portion part formed with inserting hole,

The connecting member includes insert axle, and the insert axle is inserted through described along axially orthogonal direction extends with the tubing string Inserting hole, and relative slip is formed with the inserting hole along with the swing offset of the second teeth portion part,

The tube axis of a cylinder of the inserting hole includes breaking load changing unit to the inner surface of upside, and the breaking load changing unit is to institute State insert axle breaking load changed, make it is described insert axle under the engagement by secondary collision when be broken Load from it is described insert axle under the engagement releasing state by secondary collision when breaking load it is different.

7. transfer according to claim 6, wherein,

The breaking load changing unit includes：By the contacted during secondary collision with the insert axle under the engagement One contact site and under the engagement releasing state by secondary collision when with second contact site that contacts of insert axle,

It is described insert axle axial direction on first contact site with it is described insert axle formation contact contact range, with described It is different from the contact range that the insert axle is formed to insert second contact site on the axial direction of axle.

8. transfer according to claim 6, wherein,

The breaking load changing unit includes projection, and the projection is that the projection of the insert axle is cut when by secondary collision, And cutting of the projection under the engagement and under the engagement releasing state can use,

The projection cut under the engagement insert axle cutting direction and tubing string axial direction angulation, The cutting direction of the insert axle and angle formed by the tubing string axial direction are cut under the engagement releasing state with the projection Degree is different.