• 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:
    SUMMARYWheel steering of a motor vehicle (10) with a wheel axle (16) resiliently suspended from a vehicle frame (12), comprising a steering shaft (30) connected to the vehicle frame to steer a vehicle wheel (20) controllably connected to the wheel axle by the steering force action of a steering lance (42) , 46) between the steering gear and the vehicle wheel. According to the invention there is on the one hand a pivot joint (36) between the steering axle (30) and the vehicle frame (12), and on the other hand a reaction link (56) between the wheel axle (16) and the steering axle (30), arranged in response to rotational movements in a vertical plane of the wheel axle (16 ) pivot the steering shaft (30) around the pivot joint (36) in the vertical plane relative to the vehicle frame (12) to the law where a steering force effect of the steering linkage (42, 46) from the wheel axle (16) is minimized.
    公开号:SE1150559A1
    申请号:SE1150559
    申请日:2011-06-20
    公开日:2012-12-21
    发明作者:Sven-Anders Melin；Jolle Ijkema；Malte Rothhaemel
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    1Wheel steeringTECHNICAL AREAThe invention relates to a wheel steering of a motor vehicle with a wheel axle resiliently suspended from a vehicle frame, comprising a steering shaft connected to the vehicle frame for steering a vehicle wheel controllably connected to the wheel axle by the steering force influence of a steering linkage between the steering axle and the vehicle wheel. The invention relates toalso a steering shaft for such a wheel steering and a motor vehicle equipped with such a steering wheel.
    BACKGROUNDVehicles equipped with such a steering wheel may have problems with the steering linkage being subjected to an extra undesired steering force on the wheel axle, which may be superimposed on a deliberately normal steering force from the steering axle when the resiliently suspended wheel axle performs a movement including a rotational movement in a vertical plane. a strong in-braking of the vehicle. Such an extra steering force on the steering linkage can lead tothe vehicle pulls at an angle, so that the driver of the vehicle must steer against it.
    DESCRIPTION OF THE INVENTIONA second feature of the invention is therefore to provide a wheel guide of the type indicated in the introduction which can minimize the overlay of extra steering force on the steering linkage when the wheel axle performs such a rotational movement.
    According to a consideration of the invention, there is a pivot joint between the steering shaft andthe vehicle frame, and a reaction link between the wheel axle and the steering axle, arranged to pivot the steering shaft about the pivot joint in the vertical plane relative to the vehicle frame in response to rotational movements in a vertical plane of the wheel axle relative to the law. Through this mechanical solution can2Thus, undesired steering movements of the vehicle wheel are substantially avoided, while the normal function of the steering shaft remains unaffected by the fact that the reaction link also forms the steering gear in each pivot position relative to the vehicle frame.
    According to an embodiment of the invention, the pivot joint and the reaction link can bearranged to keep an inboard orientation in the vertical plane substantially constant between the steering shaft and the wheel axle. Minimization of an undesired impact force effect on the steering linkage is thus achieved by bringing the steering shaft to -160 with the rotational movement of the wheel axle so that it maintains its orientation in the vertical plane with respect tothe wheel axle.
    In this case, the reaction link can be substantially parallel to a guide link of the guide linkage, at least in a normally loaded resting layer of the wheel axle. The pivot joint between the steering axle and the vehicle frame and a point of rotation for the wheel axle in the vertical plane canthen also be positioned at a substantially equal distance from the guide link. In addition, if the pivot joint is coaxial with a pivot shaft for a sector arm of the steering shaft, the arrangement can in principle function as a careful parallelogram mechanism.
    Although the reaction link and the control link may be located at adjacent sides ofwheel axle in the vertical direction, they are in one embodiment located at the same side of the wheelaxeln. For example, if the steering link is located above the wheel axle, then the reaction link can also be located above the wheel axle, possibly at the same height as the steering link. In this case, the reaction link and the steering link tend to swing the steering shaft housing at the same hall even when the wheel axle moves in a vertical plane, ie. even when the wheel axle does notonly performs a rotational motion, but also translational motions, such as vertical andpossibly also horizontal suspension movements. As a result, the superposition of undesired control forces on the control link can be further reduced.
    A steering gear for a wheel steering according to the invention with a steering gear housing and a sec.dry arm for connection to the steering linkage, may have first bearing means for pivotally connecting the steering gear housing to the vehicle frame and second bearing means at a distance from said first bearing means for pivotally connecting the reaction link to the steering gear housing.3Other features and advantages of the invention will be apparent from the claims and the following description of exemplary embodiments.
    BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a simplified perspective view of a section of a truck, showing the principles of a wheel steering according to the invention;FIG. 2A is a side view of a wheel guide according to FIG. 1 with schematically represented wheel ina rest layer approximately corresponding to FIG. 1;FIG. 2B is a side view corresponding to FIG. 2A in a position where the wheel axle has been rotated as a result of a braking force acting on the wheel; andFIG. 3-5 are schematic side views of principal examples of various geometric configurations of a wheel guide of the invention.
    In the drawing, the same reference numerals are used throughout for parts with the same or similarfunction.
    DETAILED DESCRIPTION OF EMBODIMENT EXAMPLEIn the greatly simplified and principled representation in FIG. 1-3, a section ofa truck 10, more specifically a section with a wheel guide at one side of the vehicle 10.
    At a vehicle frame 12, a rigid wheel axle is suspended resiliently via a wheel suspension 14A wheel housing 22 of a vehicle wheel 20 is steerably mounted to the wheel axle 16 via a steering wheel.bearing 18. To effect pivotal movements of the wheel 20, a steering apparatus or steering shaft 30 is arranged on the vehicle frame 12. The steering shaft 30 has a steering shaft housing 32, an input shaft 34 and an outgoing sector arm 38, so-called pitmanarm. The control shaft 30 can be set on the edge and usually with servo function convert a input control movement from4a vehicle steering wheel 62 of a steering column 60 via the input shaft 34 to an output steering movement of the sector arm 38 about a pivot axis 39. The outer edge of the sector arm 38 is connected via a hinge 40 to a steering linkage including a steering link 42 and a steering column arm 46. The steering column arm 46 has a steering moment transmitting arm 48, the outeris connected to the guide link via a hinge 44 and the interior of which is fixedly connected to the wheel housing 22 at a geometric guide shaft (kingpin shaft) 50, so that the guide link arm 46 can guide the wheel 20 about the shaft 50 in the guide bearing 18 when affected by a guide force from the guide shaft 30. sector 48 via the guide link 42.
    On the edge not shown, the wheel steering of a complete vehicle 10 also includes links,such as a parallel strut and a pair of parallel strut arms, so that with the aid of the steering shaft 30, simultaneously with the wheel 20 shown, also pivot a corresponding wheel at an opposite side of the vehicle 10.
    As can be seen from a comparison between FIG. 2A and 2B, the wheel axle 16, when loaded with a rotating torque acting in a vertical plane, e.g. when the vehicle is braked with a braking force F during -lard, to be rotated (FIG. 2B) about a geometric axis A against the action of the wheel suspension 14 (FIG. 1) and possibly by other components of the wheel suspension 20 of the wheel 20 not shown. The geometric guide of the guide link arm 46or kingpin axle 50, which can be considered to be rigidly connected to the wheel axle 16 in verticalthe plane, will then be rotated to a corresponding extent in the vertical plane, with the result that the steering link 42, 46 risks being loaded by an undesired steering force from the wheel axle 16. This undesired steering force which thus emanates than the rear spirit of the steering link 42, 46 may be superimposed on any undesirable control force that emits itfront end of the steering linkage 42, 46.
    In order to avoid such an undesired steering force as much as possible, a reaction hose 56 is arranged between the wheel axle 16 and the steering shaft 30, and a swing bearing 36 of the steering gear housing 30 at the vehicle frame 12. More specifically, the reaction hose 56one end is connected to a link 54 at a distance from the shaft A of a fixed 52 on the wheel axle 16 and its other end is connected to a pivot joint 58 at an approximately corresponding distance than the pivot bearing 36 of the steering shaft housing 32. As shown in FIG. 1, the guide shaft housing 32 may then have a bearing member, such as a bearing eye 37, for the pivot joint 36 and a bearing member, such as a bearing pin 59, for the pivot of the reaction hose 56.joint 58. The reaction link 56 can be considered to substantially form a parallel linkage mechanism with the link 42 between the steering shaft 30 and the wheel axle 16 including the fixture 52 and the steering arm 46.
    When the wheel axle 16 is rotated about the geometric axis A in the manner described above,the reaction link 56 will pivot the steering shaft 32 about the pivot bearing 36 to such an extent that the sector arm 38 substantially maintains its position of rotation relative to the steering shaft housing 32 and follows the movement of the steering pulley 46 induced by the rotation of the wheel shaft 16, so that the steering pivot is relieved fromten. Since the reaction link 56 by definition acts as both a drawbar and push rod, it naturally also forms the retaining guide shaft 30 in each pivot bearing defined by the wheel shaft 16, so that the normal steering function of the guide shaft 30 can be continuously active even during its vertical rotational movements. The movements which occur in the steering column 60 during these oscillating movements of the steering shaft 30, cannot beshown sat occupied by e.g. kanda, possibly in the vehicle already existing lane-like andtelescopic arrangements of the steering column 60, which may otherwise be intended to allow movements of a vehicle cab relative to the vehicle frame 12 to be undesirably transferred to the steering column 60.
    In the schematic representation in FIG. 3, it is more clearly illustrated that the reaction link 56and the guide link 42 may be parallel at e.g. a neutral bearing of the wheel axle 16 and the steering shaft 30. In the configuration shown, the pivot joint 36 of the steering shaft 30 and the geometric shaft A of the wheel shaft 15 are arranged at the same distance D Than the steering link 42. Since in this case e.g. the arch 36 does not coincide with the sector arm 38pivot shaft 39 and the arrangement otherwise will not form a geometric perfectparallel linkage mechanism, still small undesired steering forces can be transmitted from the wheel axle 16 to the steering linkage arm 46.
    In a geometrically more refined configuration according to FIG. 4, however, the arrangement 30 may be designed as a stern parallelogram link mechanism e.g. when the steering shaft 30 and the wheel shaft 16 are in a neutral position in the vertical plane. As can be seen from FIG. 4, the pivot joint 36 of the control shaft 30 can then coincide with the pivot shaft 39 of the sector arm.6The arrangement can be varied in many different ways. In the embodiment of FIG. 5 shows a configuration in which the steering shaft 40 is used in the vertical plane as in the previous example, and the steering link 42 and the reaction link 56 are arranged at the top of the wheel axle 16. As further indicated by dash-dotted lines in FIG.5, in this case alternatively the reaction link 56 may be as long as the guide link 42 andbe located next to the guide link 42 in an adjacent vertical plane.
    The embodiments above mainly indicate only the principles of a wheel guide according to the invention. When designing such a wheel guide, it can be geonetricthe configuration of all input components is more accurately determined andoptimized e.g. through kinematic and dynamic sinulation with the help of appropriate bachelor software.
    The above detailed description is primarily intended to facilitate understanding andany unnecessary limitations of the invention should not be construed as such. The modifiersoperations which become apparent to one skilled in the art upon review of the specification may be practiced without departing from the spirit of the invention or the scope of the appended claims.7
    权利要求:
    Claims (8)
    [1]
    Wheel steering of a motor vehicle (10) with a wheel axle (16) resiliently suspended from a vehicle frame (12), comprising a steering shaft (30) connected to the vehicle frame for steering a vehicle wheel (20) controllably connected to the wheel axle by the steering force action of a steering lance (42, 46) between the steering axle and the vehicle wheel, characterized by a pivot joint (36) between the steering axle (30) and the vehicle frame (12); and a reaction link (56) between the wheel axle (16) and the steering shaft (30), arranged so as to respond to rotational movements in a vertical plane of the wheel axle (16) pivot the steering shaft (30) about the pivot joint (36) in the vertical plane relative to the vehicle frame (12) to the law where a steering force effect of the steering linkage (42, 46) from the wheel axle (16) is minimized.
    [2]
    Wheel steering according to claim 1, wherein the pivot joint (36) and the reaction link (36) are arranged to keep an inboard orientation in the vertical plane substantially constant between the steering shaft (30) and the wheel axle (16).
    [3]
    Wheel steering according to claim 1 or 2, wherein the reaction link (56) is substantially parallel to a steering link (42) of the steering linkage (42, 46).
    [4]
    Wheel steering according to claim 3, wherein the pivot joint (36) between the steering shaft (30) and the vehicle frame (12) and a rotation shaft (A) of the wheel axle (16) in the vertical plane are positioned at a substantially equal distance (D) from the steering link (42).
    [5]
    Wheel steering according to one of the preceding claims, wherein the reaction link (56) and the steering linkage (42, 46) are vertically located at the same side of the wheel axle (16).
    [6]
    Wheel steering according to any one of the preceding claims, wherein the pivot joint (36) is coaxial with a pivot shaft (39) for a sector arm (38) of the steering shaft (30).
    [7]
    Steering gear (30) for a wheel guide according to any one of the preceding claims, comprising a steering gear housing (32) and a sector arm (38) for connection to the steering linkage (42, 46), characterized by the first bearing means (37) for pivotally connecting the steering 8 the gear housing (32) at the vehicle frame (12) and second bearing means (59) spaced from said first bearing means (37) for pivotally connecting the reaction link (56) to the steering gear housing (32).
    [8]
    Motor vehicle (10) provided with a wheel steering according to any one of claims 1-6.
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    同族专利:
    公开号 | 公开日
    SE537801C2|2015-10-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-10-05| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1150559A|SE537801C2|2011-06-20|2011-06-20|Wheel steering|SE1150559A| SE537801C2|2011-06-20|2011-06-20|Wheel steering|
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