• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Steering column for a motor vehicle comprising two telescopic control shafts (8, 16) connected in rotation, permitting axial sliding of a front shaft (16) supporting a steering wheel, successively following the most forward position a first range depth adjustment of the position of the steering wheel, then a second damping range used in the event of an accident to damp a shock of the driver on the steering wheel, this column comprising an electric motor (30) for controlling the sliding, and a antitheft blocking device blocking the rotation of one of the shafts (16), which is automatically engaged for an axial locking position of the front shaft (16) given by the motorisation (30) being in the second damping range .
    公开号:FR3078940A1
    申请号:FR1852263
    申请日:2018-03-16
    公开日:2019-09-20
    发明作者:Laurent Rey
    申请人:JTEKT Europe SAS；
    IPC主号:
    专利说明:

    Steering column comprising a rotation locking device actuated by a motorization
    The present invention relates to a motor vehicle steering column comprising an anti-theft rotation locking system, as well as a method of controlling this steering column.
    Motor vehicles comprise a steering column generally comprising an upper front shaft receiving at its front end a steering wheel, linked in rotation to a lower shaft which drives a steering box which pivots the front steering wheels of the vehicle.
    The two telescopic shafts can slide axially between them to ensure a depth adjustment of the position of the steering wheel within a first adjustment range forming an axial stroke of the steering wheel starting from its most forward position.
    The sliding also ensures during an impact on the front of the vehicle, a possibility of driving in the upper shaft according to a second damping range coming after the first range, in order to produce a damping absorbing an energy limiting the force applied by the driver to an airbag on the steering wheel, called an airbag in English.
    It is known to have an electric motor carrying out the longitudinal sliding of a guide tube receiving the front shaft to guide it, in order to effect assisted or automatic adjustment of the depth position of the steering wheel.
    In addition, the steering columns include an anti-theft rotation locking system blocking a column shaft which operates automatically when the ignition key is removed, comprising a bolt linked to the column support, sliding to enter in an opening formed on a blocking ring fixed around a shaft of the column in order to ensure its blocking in rotation. In particular, the bolt can be actuated by an electric motor controlled by switching off the contact.
    A known locking system, presented in particular by documents FRAI-2861673 and EP-A1-0918000, comprises a friction device mounted between the bolt housing and the shaft for the first document, or between the column support and a socket sliding receiving axial immobilization ribs arranged on the shaft for the second document, giving a possibility of sliding in rotation around this shaft above a predefined torque. In particular, the predefined sliding torque is between 100Nm to 200Nm, it is preferably 150Nm.
    In this way in the event of an attempt to steal the vehicle, the operator exerting a high torque on the steering wheel in order to try to break its blocking, the blocking ring ends up turning on the shaft before obtaining deformations of mechanical elements, or a breakage of these elements. In this way, by limiting the effort, a rupture of the locking allowing the flight is avoided, and without obtaining this rupture a deformation of elements which would make driving dangerous and would require replacements.
    It will be noted that the significant torque allowing the sliding of the locking ring, requires too much force on the steering wheel which makes the vehicle impossible to drive when the locking is maintained.
    However, by using an electric motor for this locking system, this assembly is bulky both in diameter and in axial length, and has a high mass as well as a significant cost. In addition, the engine engagement command given by the vehicle's on-board network as well as the operation of this engine, must be fully secure to avoid inadvertent blocking while driving the vehicle, which complicates this system.
    The object of the present invention is in particular to avoid these drawbacks of the prior art.
    To this end, it offers a steering column for a motor vehicle comprising two telescopic control shafts linked in rotation, allowing an axial sliding of a front shaft supporting a steering wheel, successively following from the most forward position a first range of depth adjustment of the position of this steering wheel, then a second damping range used in the event of an accident to absorb a driver impact on the steering wheel, this column comprising an electric motor for sliding control, and an anti-theft blocking device blocking the rotation of one of the shafts, being remarkable in that the rotation blocking device is automatically engaged for an axial position for blocking the front shaft given by the motorization being in the second damping range.
    An advantage of this steering column is that after switching off the ignition, using the existing motorization to perform the axial sliding of the front shaft in order to place it in the axial locking position which is outside the first range adjustment used for driving the vehicle, it avoids the establishment of a second motorization to actuate the locking system which reduces the size, mass and costs of the steering column.
    The steering column according to the invention may further include one or more of the following characteristics, which can be combined with one another.
    Advantageously, the axial locking position of the front shaft is arranged before the end of the stroke of the second damping range. In this way, in the event of an accident having caused the front shaft to sink completely, which comes to the end of this second range, the locking system has passed through the axial locking position without remaining in it, which maintains the operational direction for continuing. to maneuver the vehicle if necessary, according to what certain regulations require.
    Advantageously, the rotation blocking device comprises an inner ring having axial teeth on its outer contour, which engage between teeth arranged in an outer ring. This blocking system is simple to carry out.
    In this case, advantageously the axial teeth of the inner ring and the outer ring have axially points on the side of the engagement on the other ring.
    In addition, advantageously the inner ring and the outer ring have axially a point extending axially from other points on the side of engagement on the other ring.
    Advantageously, the rotation locking device comprises a sliding sliding system limiting the torque transmitted by this device.
    In this case, advantageously the sliding system comprises an elastic ring forming slots, disposed between one of the rings and the part supporting it.
    Advantageously, the rotation blocking device comprises an axial fuse system which can break in the event of an accident under the effect of an axial force when two parts of the rotation blocking device come into contact, during displacement. of the front shaft in the second damping range.
    In this case, the axial fuse system may include elastic clips made of plastic, holding axially at least one of the rings.
    In particular, the rotation blocking device may include an inner ring fixed on a rear shaft, and an outer ring fixed inside a guide tube guiding the front shaft.
    The invention further relates to a method of controlling a steering column comprising any one of the preceding characteristics, which systematically controls the electric motorisation after switching off the ignition of the vehicle to place the front shaft in its axial position rotation lock.
    The invention will be better understood and other characteristics and advantages will appear more clearly on reading the description below given by way of example, with reference to the accompanying drawings in which:
    - Figures 1 and 2 show respectively in perspective with a partial cutaway and in axial section along a vertical plane, a steering column according to the invention;
    - Figure 3 is a partial enlargement of this axial section;
    - Figure 4 is a partial enlargement of this perspective view;
    - Figure 5 is an exploded view of the rear shaft with the inner locking ring;
    - Figure 6 details the inner ring and the outer locking ring; and
    - Figures 7a, 7b, 7c and 7d show in axial section this steering column successively disposed in the front adjustment position, in the rear adjustment position, in the locking position and in the fully depressed position after an accident .
    Figures 1 and 2 show a fixed support 4 of the steering column equipped with upper lugs provided for fixing under a cross member of the vehicle dashboard, linked to a mobile support 2 by a pivot with a transverse axis 26 to allow adjustment in height of the steering wheel. The mobile support 2 forms a closed casing comprising inside, on the rear side indicated by the arrow AR, a rear ball bearing 6 for guiding a rear shaft 8 arranged along a main axis forming a longitudinal direction.
    The rear shaft 8 axially wedged in the movable support 2 by the rear ball bearing 6, comprises at its rear end a cardan shaft 10 for connection to a shaft of the steering column, connecting it to a steering box of the vehicle.
    A front sliding tube 12 guided in a bore in the mobile support 2 allowing axial sliding, comprises at its front end a front guide bearing 14 receiving a front shaft 16 of the steering column, which is axially wedged on the sliding tube by this front bearing.
    In this way the front shaft 16 is free to rotate in the sliding tube 12, but drives this tube when it slides along its axis.
    The front shaft 16 is formed by a tube comprising at its front end external splines 18 for fixing a steering wheel, and over a rear length of internal splines 20 engaged on external splines 22 formed around the rear shaft 8 to ensure the connection in rotation.
    An electric motor 30 having an axis perpendicular to the longitudinal axis, drives a gear reducer 32 forming a bevel gear, which in turn drives a screw 34 disposed under the movable support 2, parallel to the main axis. A carriage 36 comprising a nut engaged in the screw 34, drives the sliding tube 12 which is fixed to this blade by screws 24 by a curved metal blade 28.
    The curved metal blade 28 disposed parallel to the longitudinal axis, has a 180 ° curvature so as to present its two ends one below the other, which are linked one to the carriage 36 and the other to the sliding tube 12. A rigid axial connection is thus obtained between the carriage 36 and the sliding tube 12 for adjusting the depth of the steering wheel.
    In particular, the screw-nut connection of the screw 34 and the nut of the carriage 36 has irreversible kinematics, an axial thrust on this nut not causing rotation of the screw thanks to a sufficiently reduced pitch of this screw in order to '' avoid an adjustment of the depth position of the steering wheel if the driver applies an axial force on it. For this advantageously an inclination of the thread is made with respect to the axis of the screw 34 between 8 and 20 degrees, which is preferably 12 degrees.
    However, in the event of an impact on the front of the vehicle causing the steering wheel airbag to swell, the driver's torso applies a significant force to the steering wheel, transmitted by the front shaft 18 to the sliding tube 12 which is retained by the metal blade 28. For a sufficiently high force, the curvature of the metal blade 28 takes place gradually, leaving the sliding tube 12 to go backwards with an energy absorption, to reach the bottom of the movable support at the end of the race. 2, as shown in Figure 7d.
    The rear shaft 8 supports an inner locking ring 40 fitted on its contour with axial teeth, and the sliding tube 12 an outer locking ring 50 fitted inside corresponding axial teeth, which in a defined axial position of this tube presented in FIG. 7c, are engaged one inside the other in order to produce an anti-theft rotation locking of the steering.
    Figures 3, 4, 5 and 6 show the outer ring 50 rigidly fixed in the rear part of the sliding tube 12, comprising on the inside a succession of axial teeth each ending in a point 48 facing backwards.
    The inner ring 40 flexibly attached to the rear shaft 8, has on the outside a succession of axial teeth each ending in a point 48 facing forward, so as to be able to engage in the teeth of the outer ring 50 by axial sliding.
    An elastic ring 42 made of elastomer has a contour forming a succession of slots, comprising on the inner side recesses receiving corresponding axial teeth 60 formed around the rear shaft 8, and on the outside side recesses receiving corresponding axial teeth 46 formed in the inner ring 40. The inside diameter of the teeth of the outside ring 50 is greater than the outside diameter of the teeth of the inside ring 40.
    In this way, an assembly blocked in rotation of the inner ring 40 on the shaft 8 is obtained, comprising a small flexibility making it possible to avoid noise when stresses are applied to this inner ring.
    Advantageously, the elastic ring 42 is made of an elastomer having a glass transition temperature of between -80 ° C and + 30 ° C, which is preferably close to -40 ° C. For this, use may in particular be made of a material of the thermoplastic elastomer type, an ethylenepropylene-diene monomer "EPDM", a butadiene-acrylonitrile "NBR", a butadiene-acrylonitrile hydrogenated "HBNR", or a silicone.
    The rear points 48 on the axial teeth of the outer ring 50 and the front points of the inner ring 40 facilitate the introduction of the teeth of this outer ring between those of the inner ring when the front shaft 8 moves back.
    In addition, advantageously a longer tooth is produced on each ring 40, 50, having an extension facing the other ring of approximately 0.5 to 3 mm, preferably 1 mm, which is slightly angularly offset, so as to prepare an engagement. from the rest of the teeth by a small angular rotation if necessary. This small rotation is made possible by the deformable nature of the elastic ring 42, which allows a small rotation of the inner ring 40 around the rear shaft 8 so that the teeth of the two rings 40, 50 can cooperate together without block.
    An open elastic clip 44 is fixed in a groove of the rear shaft 8 on each side of the inner ring 40, to maintain the axial position of this ring and of the elastic ring 42.
    FIGS. 7a and 7b show respectively the maximum front position A and the rear maximum position B for the depth adjustment of the steering wheel, produced by the motorization 30 within the framework of normal driving of the vehicle, with an adjustment range PR between these two maximums, which is usually 30 to 50mm.
    FIG. 7c presents a locking position C systematically arranged at each stop of the vehicle by the motorization 30, after the driver has cut the ignition, by moving back the guide tube 12 so as to align the outer ring 50 with the inner ring 40 after having engaged their teeth between them.
    The steering is locked in a simple and economical manner, with very few components added, by using the motorization 30 and its already existing control circuit for the depth adjustment of the steering wheel.
    It will be noted that the locking position C being clearly moved back relative to the adjustment range PR in depth of the steering wheel, frees a space in front of this steering wheel which facilitates the entry or exit of the driver in the vehicle.
    FIG. 7d presents an accident position D obtained from a position in the adjustment range PR, where the driver has applied a large force to the steering wheel which deforms by completely unwinding the curved metal blade 28, in order to arrange the tube guide 12 in rear stop after having traversed the damping range PA coming after this adjustment range.
    In this case the outer ring 50 is passed over the inner ring 40 to go behind it without being blocked by this inner ring, which makes the steering completely free in order to be able to meet certain regulatory requirements imposing in this case a maneuver possible steering with the steering wheel.
    As a variant, the mounting of the inner ring 40 may include an axial force fuse, comprising for example elastic clips 44 made of plastic material, allowing a complete setback by breaking under the effect of an impact in the event of an accident. of the front shaft 16 in case the teeth of the two rings 40, 50 abut on each other without being able to align angularly to allow passage.
    As a variant, any other arrangement of the rings 40, 50 can be used. One can in particular provide a system for sliding the outer ring 50 in rotation relative to the guide tube 12, for a sufficiently high torque threshold 10, preferably of the order of 150Nm, in order to avoid damage to the column of steering in the event that an attacker applies high torque to the steering wheel in an attempt to break the lock. It is also possible to arrange the rings 40, 50 axially at other locations in the mobile support 2.
    权利要求:
    Claims (11)
    [1" id="c-fr-0001]
    1 - Steering column for a motor vehicle comprising two telescopic control shafts (8, 16) linked in rotation, allowing axial sliding of a front shaft (16) supporting a steering wheel, successively following from the most forward position a first depth adjustment range (PR) of the position of this steering wheel, then a second damping range (PA) used in the event of an accident to absorb a driver impact on the steering wheel, this column comprising an electric motor ( 30) for sliding control, and an anti-theft blocking device blocking the rotation of one of the shafts (16), characterized in that the rotation blocking device is automatically engaged for an axial position for blocking the front shaft ( 16) given by the motorization (30) located in the second damping range (PA).
    [2" id="c-fr-0002]
    2 - Steering column according to claim 1, characterized in that the axial locking position of the front shaft (16) is arranged before the end of the stroke of the second damping range (PA).
    [3" id="c-fr-0003]
    3 - Steering column according to claim 1 or 2, characterized in that the rotation blocking device comprises an inner ring (40) having axial teeth on its outer contour, which engage between teeth disposed in an outer ring (50).
    [4" id="c-fr-0004]
    4 - Steering column according to claim 3, characterized in that the axial teeth of the inner ring (40) and the outer ring (50) have axially spikes (48) on the side of engagement on the other ring .
    [5" id="c-fr-0005]
    5 - Steering column according to claim 4, characterized in that the inner ring (40) and the outer ring (50) have axially a point (48) projecting axially from other points on the side of engagement on the other ring .
    [6" id="c-fr-0006]
    6 - Steering column according to any one of the preceding claims, characterized in that the rotation blocking device
    11 comprises a sliding sliding system limiting the torque transmitted by this device.
    [7" id="c-fr-0007]
    7 - Steering column according to claims 3 and 6, characterized in that the sliding system comprises an elastic ring (42) forming slots, disposed between one of the rings (40, 50) and the part supporting it.
    [8" id="c-fr-0008]
    8 - Steering column according to any one of the preceding claims, characterized in that the rotation locking device comprises an axial fuse system which can break in the event of an accident under the effect of an axial force at the bringing two parts of the rotation blocking device into contact when the front shaft (16) moves in the second damping range (PA).
    [9" id="c-fr-0009]
    9 - Steering column according to claims 3 and 8, characterized in that the axial fuse system comprises elastic clips (44) made of plastic, holding axially at least one of the rings (40, 50).
    [10" id="c-fr-0010]
    10 - Steering column according to claim 3, characterized in that the rotation locking device comprises an inner ring (40) fixed to a rear shaft (8), and an outer ring (50) fixed inside of a guide tube (12) guiding the front shaft (16).
    [11" id="c-fr-0011]
    11 - Method of controlling a steering column according to any one of the preceding claims, characterized in that it controls the electric motorization (30) systematically after a cut in the ignition of the vehicle to arrange the front shaft (16) in its axial rotational locking position.
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2019175502A1|2019-09-19|Steering column including a motor-actuated device for blocking rotation
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    EP3145790B1|2018-07-04|Steering column mechanism adjustable in depth with a retractable stopper
    FR2877271A1|2006-05-05|VENTILATION SYSTEM AERATOR OF THE CABIN OF A VEHICLE
    EP2188157B1|2011-03-09|Shock impactor for an automobile powertrain
    EP3412524B1|2022-02-23|Bearing comprising an arm for holding a linkage in a transport position, associated linkage subassembly and linkage, and method for locking a linkage in the transport position thereof
    EP3412523B1|2020-09-09|Linkage subassembly and linkage held in a transport position by means of a locking element, and method for locking said linkage by means of such a locking element
    FR3057532A1|2018-04-20|FLYWHEEL FOR AUTONOMOUS MOTOR VEHICLE.
    WO2010081952A1|2010-07-22|Motor vehicle comprising an opening roof mounted such that it can move on the roof of this vehicle
    EP0021914A1|1981-01-07|Windshield wiper, especially for automotive vehicles
    FR2624823A1|1989-06-23|Movable and retractable air deflector for a motor vehicle
    FR3072640A1|2019-04-26|MOBILE REAR DIFFUSER OF A MULTI-PANEL AUTOMOTIVE VEHICLE
    WO2004037621A1|2004-05-06|Safety arrangement for separating into two elements the driving head of a wiper arm
    FR2896470B1|2019-07-05|STEERING COLUMN WITH FIXED WHEEL HUB AND MEANS FOR DISPLACING THE STEERING WHEEL.
    FR2749053A1|1997-11-28|Seat adjuster for motor vehicle
    FR2783782A1|2000-03-31|STEERING COLUMN ANTITHEFT COMPRISING IMPROVED PENAL LOCKING MEANS
    FR2775740A1|1999-09-10|BALL JOINT, PARTICULARLY FOR CABLE END OR FOR DRIVE LINKAGE
    FR2888275A1|2007-01-12|Sliding door centering device for motor vehicle, has male part with finger mounted in hollow body, where projecting length of finger is of specific millimeters, and projection part with housing to receive male part during closing of door
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    FR3066976B1|2019-07-19|LOCKING ARRANGEMENT OF A WHEELHOUSE IN A TRANSPORT POSITION, A WAREHOUSE SUB-ASSEMBLY AND A WHEELHOUSE HAVING SUCH A LOCKING MEMBER, AND A METHOD FOR PLACING THE LOCKING MEMBER ON A WHEELHOUSE
    EP3401473B1|2020-04-08|Device for unlocking an openable body section
    FR2889142A1|2007-02-02|Motor vehicle steering column anti-theft lock has bolt and actuator assembly set on a level with steering housing and bolt engaging with plate fixed to pinion
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    同族专利:
    公开号 | 公开日
    WO2019175502A1|2019-09-19|
    DE112019001377T5|2021-01-14|
    JP2021518299A|2021-08-02|
    CN111867918A|2020-10-30|
    BR112020018843A2|2020-12-29|
    FR3078940B1|2021-06-18|
    US20210024120A1|2021-01-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0499001A1|1991-01-29|1992-08-19|Valeo Securite Habitacle|Steering lock control device for a steering lock apparatus|
    FR3023243A1|2014-07-07|2016-01-08|Peugeot Citroen Automobiles Sa|STEERING COLUMN FOR A MOTOR VEHICLE COMPRISING TWO COMPRESSIBLE PARTS SUPPORTED BY KEYS|
    DE102016111473A1|2015-06-25|2016-12-29|Steering Solutions Ip Holding Corporation|STATIONARY STEERING WHEEL ASSEMBLY AND METHOD|
    FR2771060B1|1997-11-19|1999-12-17|Valeo Securite Habitacle|ANTITHEFT FOR A MOTOR VEHICLE STEERING COLUMN|DE102017120669A1|2017-09-07|2019-03-07|Trw Automotive Gmbh|Steering column assembly for a motor vehicle and steering system|
    FR3099454B1|2019-07-31|2021-07-09|Jtekt Europe Sas|Drive trolley for a vehicle steering system allowing movement of a cover piece identical to the movement of a movable tube during depth adjustment and in an accident.|
    DE102020105625A1|2020-03-03|2021-09-09|Thyssenkrupp Ag|Steering column for a motor vehicle|
    法律状态:
    2019-02-14| PLFP| Fee payment|Year of fee payment: 2 |
    2019-09-20| PLSC| Publication of the preliminary search report|Effective date: 20190920 |
    2020-02-13| PLFP| Fee payment|Year of fee payment: 3 |
    2021-01-29| PLFP| Fee payment|Year of fee payment: 4 |
    2022-02-15| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1852263|2018-03-16|
    FR1852263A|FR3078940B1|2018-03-16|2018-03-16|STEERING COLUMN INCLUDING A ROTATION LOCKING DEVICE ACTIVATED BY A MOTORIZATION|FR1852263A| FR3078940B1|2018-03-16|2018-03-16|STEERING COLUMN INCLUDING A ROTATION LOCKING DEVICE ACTIVATED BY A MOTORIZATION|
    US16/981,468| US20210024120A1|2018-03-16|2019-03-13|Steering column including a rotational blocking device actuated by a motorization|
    JP2020549680A| JP2021518299A|2018-03-16|2019-03-13|Steering column with rotating block device actuated by drive|
    PCT/FR2019/050544| WO2019175502A1|2018-03-16|2019-03-13|Steering column including a motor-actuated device for blocking rotation|
    BR112020018843-3A| BR112020018843A2|2018-03-16|2019-03-13|STEERING COLUMN WITH ROTATING LOCK DEVICE FOR A MOTORIZED VEHICLE AND METHOD OF CONTROL OF THE SAME|
    DE112019001377.7T| DE112019001377T5|2018-03-16|2019-03-13|Steering column with a motorized anti-rotation device|
    CN201980019615.XA| CN111867918A|2018-03-16|2019-03-13|Steering column comprising an electric device for blocking rotation|
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