The application requires in the U.S. Provisional Patent Application No.60/905 of submission on March 8th, 2007,715 preceence, and the whole content of described application is cited as a reference at this.
The utility model content
Thereby technical problem to be solved in the utility model relates to a kind of telescopic type steering column assembly and may drop to the bearing circle that hinders chaufeur to escape above the chaufeur lap after bumping from described vehicle, above situation be in the tubing string destructive process when jacket unclamps installation bracket, get loose between the structural elements of tubing string installation bracket and vehicle, thereby cause after the tubing string assembly is destroyed, described tubing string assembly is no longer vertically supported to be caused.
The utility model provides a kind of adjustable steering column assembly that is used for vehicle, comprise: the carriage of rigid attachment above vehicle, described carriage has first groove that limits vertical adjusting path, join axle sleeve above the described steering shaft in order to the steering shaft that is rotated around certain axis with by axle journal.Rigid attachment above described axle sleeve and movable being attached to be used for along described adjusting path shuttle that described steering shaft and described axle sleeve are regulated above the described carriage, described shuttle has second groove that limits the destruction path, and described second groove has the second portion that the described steering shaft of constraint is in the first of normal condition and the described steering shaft of permission moves through described destruction path under collapse state.Pin extends through described first groove and second groove so that described shuttle is connected to above the described carriage.
The utility model also provides a kind of adjustable steering column assembly that is used for vehicle, comprising: in order to the steering shaft that is rotated around certain axis, joined to axle sleeve above the described steering shaft and rigid attachment to the shuttle above the described axle sleeve by axle journal.Be arranged in described shuttle and be roughly parallel to first groove that described axis extends, described first groove has relative back to end sections of forward end partial sum, is arranged in described shuttle separates and have the certain curvature radius backward with described first groove second deep-slotted chip breaker.When being in normal condition, pin extends through described forward end part, described pin has line of centers, normal condition, under described normal condition, described pin is arranged in described forward end part and described line of centers and described second groove and separates the distance that equals described radius of curvature, and collapse state, under described collapse state, described pin is arranged in described back and separates certain distance less than described radius of curvature to end sections and with described second groove, moves downwards in order to prevent described steering shaft and described axle sleeve.
The utility model also provides a kind of adjustable steering column assembly that is used for vehicle, comprise: the carriage of rigid attachment above vehicle, described carriage has first groove that limits at least one vertical adjusting path, join axle sleeve above the described steering shaft in order to the steering shaft that is rotated around certain axis with by axle journal.Rigid attachment is above described axle sleeve and be movably attached to and be used for along described vertical adjusting path shuttle that described steering shaft and described axle sleeve are regulated above the described carriage, extend through described shuttle and described carriage so that described shuttle carries out the pin of pivoting action with respect to described axle sleeve, be positioned at the vertical substantially deep-slotted chip breaker that has when described assembly is in normal condition the certain curvature radius that records from the line of centers of described pin on the described shuttle, with extend through described first groove and described deep-slotted chip breaker when described assembly is in normal condition, at least described assembly is carried out the bar of pitch adjustment, and when described assembly is in collapse state, described bar and described pin separate the certain distance less than described radius of curvature, move downwards in order to prevent described steering shaft and described axle sleeve.
The utility model also provides a kind of adjustable steering column assembly that is used for vehicle, preferably has the carriage of the first groove rigid attachment above vehicle that is used to utilize the vertical adjusting path that limits assembly.Steering shaft is joined to by axle journal above the axle sleeve of assembly, in order to be rotated around certain axis.Shuttle (shuttle) rigid attachment above axle sleeve and adjustable ground be attached to and be used to above the carriage assembly be stretched and assembly is carried out pitch adjustment.Shuttle has second groove that limits the destruction path, and described second groove preferably has the second portion that the described steering shaft of constraint is in the first of normal condition and the described steering shaft of permission moves through described destruction path under collapse state.Pin extends through described first groove and second groove so that described shuttle is connected to above the described carriage.
Preferably, described shuttle has and is used to receive first groove that extends through equally above the carriage deep-slotted chip breaker in order to the obliquity rod that carries out pitch adjustment.The radius of curvature of this deep-slotted chip breaker is that the line of centers from pin begins to measure.In the process of carrying out pitch adjustment, described axle sleeve and described steering shaft pivot around the line of centers of pin.When collision happens, described pin preferably moves in described second groove and towards obliquity rod.Should move not and pivotal point or central lines for the curvature of deep-slotted chip breaker, prevented thus that described axle sleeve and described steering shaft from falling towards the chaufeur lap when collision happens.
The purpose of this utility model, feature and advantage comprise that a kind of keeping up supported and away from adjustable steering column assembly of chaufeur after bumping.Other advantage comprises a kind ofly having economy and needs seldom or do not need to be serviced longitudinally adjustable and that gradient is adjustable, the firm and simple relatively assembly of design at the producer mask.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the adjustable steering column assembly 20 that is used for vehicle has for vehicle and stretches out backward along rotation axis 24 and arrives the steering shaft 22 that is attached to the far-end 26 above the bearing circle (not shown).Steering shaft 22 is preferably joined to above tube-like envelope or the axle sleeve 28 by axle journal and is rotated in described tube-like envelope or axle sleeve, described tube-like envelope or axle sleeve by rigid joint to compression bracket or above the shuttle 32 or comprise compression bracket or shuttle 32 substantially.Shuttle 32 is subjected to the supporting by the carriage 30 in the assembly 20 of a plurality of fastener (not shown) rigid joint above vehicle chassis, thereby described a plurality of fastener preferably protrudes upward with the chassis from carriage 30 and engages.
Axle sleeve 28 and the axle 22 that stretches out jointly preferably are configured and are arranged longitudinally to stretch out and indentation between retracted position 34 (referring to Fig. 3) and extended position 36 (referring to Fig. 4) as individual unit and with respect to carriage 30.When stretching out, axle sleeve 28 and steering shaft 22 move on linearity direction backward with respect to vehicle, and when indentation, axle sleeve 28 and steering shaft 22 move on direction forward and roughly move in carriage 30.
Yet, this forward direction and back are to moving the rotation axis 24 that might not be parallel to steering shaft 22, and this is because axle sleeve 28 and steering shaft 22 preferably are configured and are arranged upwards or between the state that is inclined upwardly (shown in Fig. 3 and 4) to produce in downward or downward-sloping state (not shown) of gradient and gradient as individual unit.This tilt adjustment (referring to arrow among Fig. 3 38) on the direction of camber line and approximate vertical moves the far-end 26 of steering shaft 22.In order to hold the less chaufeur of stature, axle sleeve 28 extends near extended position 36 usually and is in downward-sloping state.In order cosily to hold the bigger chaufeur of stature, axle sleeve 28 is be retracted to usually near near the retracted position 34 and be in the state of being inclined upwardly.
Except that steering shaft 22, axle sleeve 28, carriage 30 and shuttle 32, steering column assembly 20 also has being supported and connect the boundary between shuttle 32 and the carriage 30 be used for blocking device 40 that tubing string is regulated between shuttle 32 and carriage 30.Above axle sleeve 28, and steering lock mechanism 44 is incorporated between steering shaft 22 and the ignition device (not shown) a plurality of linings 42 in the assembly 20 with steering shaft 22 swivel bearings, to prevent that steering shaft produces rotation when closing vehicle ignition.In the collision happens process when chaufeur bumps against on the bearing circle, dynamic energy absorber in the assembly 20 or strap (strap) 46 absorbs the kinetic energy that is produced, and the adjustable tween drive shaft 48 in the assembly 20 extends between Hooke's coupling 52 at forward direction Hooke's coupling 50 and back.Forward direction Hooke's coupling 50 be connected to the forward direction steering swivel system of vehicle (not shown) or above the steering gear assembly and the back above Hooke's coupling 52 is connected to steering shaft 22.
Referring to Fig. 1-2,5 and 8, carriage 30 has the base plate 54 that preferably is rigidly secured to the approximate horizontal above the vehicle chassis that is positioned at collision structure below.Two vertical panels 56 of carriage 30, thus 58 stretch out adjustable ground downwards from base plate 54 and link to each other with shuttle 32. Panel 56,58 is respectively elongated in the horizontal direction, and is essentially parallel to each other, and carries the corresponding groove 60,62 that the while level is extended.Preferably and as shown in FIG., installation bracket 30 is blanked parts.Yet the carriage of other form can be a Casting Parts.
Referring to Fig. 1-2,5 and 7, shuttle 32 takes the shape of the letter U usually and is rigidly connected with axle sleeve 28.Two vertical substantially walls 64,66 of shuttle 32 roughly protrude upward and roughly are positioned at axle sleeve 28 tops, thereby adjustable ground is connected on the corresponding panel 56,58 of carriage 30.The groove 68,70 of level is positioned at corresponding wall 64 with vertical and curved substantially groove 72,74 substantially, in 66, thereby make corresponding groove 60 in groove 68,70 and the carriage 30,62 and carriage 30 in the groove 72,74 that intersects with corresponding groove 60,62 roughly extend jointly.Preferably, deep-slotted chip breaker 72,74 is parallel to each other and spaced apart with corresponding groove 68,70 backward.
In the time of above shuttle 32 is assembled into carriage 30, pilot pin 76 extends through the groove 68,70 in the shuttle 32 and passes groove 60,62 on the carriage 30.Preferably, described pin 76 is that an end has the head of expansion and the bolt that the other end has nut 78.Similarly, obliquity rod 80 stretches out the deep-slotted chip breaker 72,74 that passes in the shuttle 32 and the groove 60,62 on the carriage 30.Preferably, obliquity rod 80 is that an end has the head of expansion and the bolt that the other end has nut 82.Obliquity rod 80 is the part of blocking device 40 substantially, the handle 84 that described blocking device further has and the bolt 80 between the wall 64 of nut 82 and shuttle 32 meets the boundary vertically.When handle 84 activated or around bar 80 when being rotated, wall 64,66 unclamps and is clamped in above the carriage 30, in order to tubing string assembly 20 correspondingly being regulated and locked described adjustment state.
Referring to Fig. 1-4 and 6, tween drive shaft 48 (being telescopically) is vertically regulated, in order under normal condition or configuration the tubing string assembly vertically being adjusted to extended position 36 from retracted position 34, (referring to Fig. 6) vertically is adjusted to failure position 88 with the tubing string assembly when described assembly is in collapse state 90 times simultaneously.In order to realize this axial adjustment, tween drive shaft 48 has the outer sleeve 92 that is attached at forward end 94 places above the forward direction U-joint 50 and is being attached to the inner sleeve 96 of back above U-joint 52 in the back to 98 places, end.It is inner and preferably rotatably together fixed to one another with those skilled in the art's known manner quilt by spline that inner sleeve 96 is set at outer sleeve 92 slidably.
In the course of normal operation (being normal condition 86) of this assembly, pilot pin 76 releasably is fixed in the forward end part 100 of two horizontal slots 68,70 that compress shuttle 32 (referring to Fig. 1 and Fig. 7).When so fixedly, pilot pin 76 is positioned in the position of obliquity rod 80 further away from each other, and away from distance equal the radius of curvature 102 (i.e. distance from the line of centers 104 of pilot pin 76 to the deep-slotted chip breaker mean radius of curvature) of deep-slotted chip breaker 72,74 substantially.The remainder of straight trough 68,70 or back are stretched out certain distance to end sections 106 backward from appropriate section 100, and described distance is substantially equal to the retraction stroke of assembly 20 in collision process.In producing the process of this retraction stroke, to advance when passing the part 106 of groove 68,70 when pin 76, kinetic energy is absorbed.In order to absorb kinetic energy, the wall 64,66 of shuttle 32 produces plastic deformation.Produce described distortion and be because the width 108 of part 106 less than the diameter of pin 76.By contrast, the width 110 of the part 100 of groove 68,70 is slightly larger than the diameter that is used to make the pin that shuttle 32 and axle sleeve 28 pivot around line of centers 104 in the process of steering column being carried out pitch adjustment.
Steering column assembly 20 is being carried out in the process of telescopic adjustment, and tween drive shaft 48 telescopicallies stretch out and/or indentation and shuttle 32 move with respect to carriage 30.In this moving process, pin 76 and obliquity rod 80 keep constant distance (being radius of curvature 102) each other, and move together along bracket slot 60,62.Tubing string assembly 20 is being carried out in the process of pitch adjustment, installation bracket 30 and compression shuttle 32 relative to each other move at an angle, obliquity rod 80 is with moving together along deep-slotted chip breaker 72,74 with respect to installation bracket 30 and around the compression shuttle 32 that the line of centers 104 of pilot pin 76 pivots.
Referring to Fig. 2 and 7-8, thereby energy absorber system in the steering column assembly 20 or U-shaped strap 46 will allow to move between vehicle structure member and steering shaft 22 further to absorb kinetic energy by resistivity ground in destructive process.Strap 46 can be elongated hardware, and described hardware has second free end that is fastened to the first end above the installation bracket 30 and is provided with along the outside face of axle sleeve 28 by rivet 112.Between its first end and the second end, strap 46 is provided with around obliquity rod 80.In the process that tubing string initially is damaged, owing to the frictional engagement between compression shuttle 32 recited above and the installation bracket 30 is overcome, so any inside advancing that the normal telescopic moving of tubing string is realized all is absorbed.At the normal inwardly flexible point that is reached of advancing of tubing string (is that pilot pin 76 is shelved on by limiting groove 60 substantially, the panel 56 of the carriage 30 of 62 end, 58 carried back on the backstop 120) outside, at this some place, be fixed in the U-shaped curve of strap 46 around the sleeve 114 of obliquity rod 80 and/or pilot pin 76 arrival slots 68,70 back to the end, along with tubing string continues to be damaged, strap 46 produces plastic deformation.When this part of tubing string is damaged, along with strap 46 is untied obliquity rod sleeve 114, pilot pin 76 is away from its releasable fixed position that is positioned at substantially in the horizontal slot 68,70, and slide (as comparing) towards obliquity rod 80 with shown in Fig. 3-6 along groove 68,70.The destruction of tubing string assembly 20 as described above also can cause tween drive shaft 48 to continue to produce contraction destruction.
Make steering column assembly 20 produce in the process of shrinking owing to bumping or afterwards, tubing string assembly and bearing circle keep up and are supported and away from chaufeur, help chaufeur thus and escape from vehicle after collision happens.All the time, installation bracket 30 remains fixed in above the vehicle structure member (not shown), and compression shuttle 32 keeps linking to each other with installation bracket 30, as axle sleeve 28, steering shaft 22, bearing circle.After shrinking, compress the setting gradient position that the frictional engagement that is maintained between shuttle 32 and the installation bracket 30 will maintain tubing string, upwards support the lap of tubing string thus away from chaufeur.
Further, in contraction process, along with the groove 68 of pilot pin 76 along approximate horizontal, 70 move towards obliquity rod 80 from its releasable fixed position, the distance that pilot pin 76 moves is less than groove 72,74 radius of curvature 102, thus by being moved with respect to obliquity rod 80, the compression shuttle suppressed the pivoting action that line of centers 104 that compression shuttle 32 centers on pilot pin 76 carries out thus.The curved side of deep-slotted chip breaker 72,74 forms interference with obliquity rod 80 and engages.Therefore, by the distance between pilot pin 76 and obliquity rod 80 that is caused changes because tubing string stretches, also suppressed tubing string in collision process by being disengaged that blocking device 40 may exist from moving downward that carry out the gradient position of its setting, upwards support the lap of tubing string thus away from chaufeur.
Referring to Fig. 9, there is shown second embodiment of steering column assembly 220, in this accompanying drawing,, use the drawing reference numeral similar to represent similar element to the drawing reference numeral among first embodiment except that adding on the drawing reference numeral 200.Different with steering column assembly 20 is that steering column assembly 220 has roughly/the telescopic axle sleeve 228 of the scalable tween drive shaft 48 of alternative first embodiment on function.Therefore, axle sleeve 228 has outer sleeve 120 and the inner sleeve 122 that moves toward each other vertically.Similarly, be arranged on scalable steering shaft 222 in the axle sleeve 228 have move toward each other vertically and with corresponding to elongated interior section 124 of the telescopic moving of axle sleeve 228 and elongated exterior section 126.Disc spring or compression spring 128 are compressed between the downside of the supporting structure 130 of inner sleeve 122 and carriage 230, thereby help to carry out pitch adjustment.
In operational process, the inner sleeve 122 of axle sleeve 228 longitudinally is maintained fixed motionless with respect to carriage 230, allows axle sleeve 228 adjustable grounds to tilt around trunnion 276 simultaneously, and described trunnion 276 extends through the supporting structure of carriage 230 and inner sleeve 122.Shuttle 232 rigidity are attached to above the outer sleeve 120 of axle sleeve 228 and obliquity rod 280 extends through the vertical substantially groove 272,274 on the shuttle 232 and the groove 260 of the level substantially on the carriage 230.There is not the described shuttle groove 68,70 of first embodiment in the steering column assembly 220.The substitute is, the appearance profile of groove 260 is suitable for when bumping producing plastic deformations at the effect bottom bracket 230 of bar 280.
Though constituted currently preferred embodiments in this disclosed various ways of the present utility model, the embodiment of many other forms also is possible.This paper is not intended to mention all possible equivalent way or all improvement that the utility model is made.Be appreciated that at this employed term it only is descriptive, and nonrestrictive, and under the situation that does not depart from spirit or scope of the present utility model, can make multiple change to the utility model.