• 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:
    SUMMARY Deflection protection (10) for a flexurally elastic object, comprising a support (10A, 10B) for the object at a deflection-prone area along the object. According to the invention, the support comprises a pair of opposite ends (12) and a joint (14, 18) between the ends for connection to the object at the deflection-prone area, the ends being located so that in a normal position for a deflection of the object is arranged at a distance from the object to form, together with the joint (14, 18), a bending stop for the object in a deflection-protective boundary position for the deflection of the object. (Flo. 4)
    公开号:SE1151019A1
    申请号:SE1151019
    申请日:2011-11-01
    公开日:2013-05-02
    发明作者:Henrik Bruce Johansson
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    DISCLOSURE OF THE INVENTION An object of the present invention is to provide a deflection protection of the kind initially indicated which only slightly increases the weight and space requirements of the object and only insignificantly changes the desired suspension properties.
    This is achieved by the features set forth in the appended claims.
    According to the invention, the support comprises a pair of opposite ends and a joint between the ends for connection to the object at the bending-prone area, the ends being located so that in a normal position for a deflection of the object they are arranged at a distance from the object to together with the joint forming a bending stop for the object in a deflection protection limit position for the deflection of the object.
    Because the ends of the support are arranged at a distance from the object, the object can fulfill its function substantially unhindered within its desired interval for deflection from the normal position. The only intervention of the support with the object can in principle be e.g. only a line abutment of the joint against the opposite sides of the object. When the deflection reaches the limit position and the bending stop comes into operation, the ends and the intermediate joint cooperate to form opposite support points over the length of the deflection protection against continued deflection of the object. The deflection protection then regionally increases the stiffness of the object over the length of the deflection protection, so that the object is able to withstand increased loads, e.g. longitudinal loads, which would otherwise deflect the object to an undesirably large extent or even break the object.
    According to one embodiment, the support can be arranged to at least partially enclose the object. In a completely enclosing configuration, the support can be in the form of e.g. a sleeve mounted on the object with a channel diverging towards the two opposite ends. The channel may have a cross-sectional shape corresponding to the cross-sectional shape of the object, such as circular or rectangular. In a partially enclosing configuration for e.g. a leaf spring, the support can be arranged at both opposite sides of the spring or at only one side of the spring.
    According to one embodiment, the dressing comprises a soluble dressing. Such releasable joints, such as screw joints, can enable an existing flexurally elastic object, e.g. an existing leaf spring of a wheel suspension in a motor vehicle, can subsequently be provided with a deflection protection, without it having to be dismantled. Each screw connection can then be arranged at each longitudinal edge of the leaf spring. However, it is also conceivable that a releasable dressing can be connected through a hole in the object if this can be permitted for strength reasons.
    However, the dressing may also be an insoluble dressing. Such a dressing can be e.g. a welding, soldering or gluing joint. The support can also be formed in one piece with the object by various shaping or processing methods.
    The ends of the support may be a pair of spaced crosspieces of the support. The cross pieces can be held together by opposite side pieces of the support. The intermediate joint can then also comprise a crosspiece which is brought to abut against the object by means of e.g. above-mentioned screw connections which can extend through the side pieces of two opposite supports in a double-sided configuration of the deflection protection. Such an “open” support with spaced cross and side pieces can hold down the weight of the deflection protection.
    A flexural elastic object for a deflection protection according to the invention may have a reduced thickness in a plane for its deflection at the deflection-prone area. This feature can be allowed due to the latent regional stiffening of the object provided by the deflection protection. This reduces the weight of the object. In addition, the risk of fatigue failure of the object can also be reduced in and around the bending-prone area, since the resulting thinner object is then exposed to lower stresses during repeated bending compared with a thicker object.
    Other features and advantages of the invention may be apparent from the claims and the following description of embodiments.
    BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A and 1B, views are partly in longitudinal section of an enclosing deflection guard according to the invention applied to an elongate object in a normal position and a deflection-protected boundary position, respectively; FIG. 2 is a schematic side view of a one-sided deflection guard according to the invention applied to a leaf spring; FIG. 3 is a side view of an alternatively designed one-sided deflection protection according to the invention applied to a leaf spring; FIG. 4 is a perspective view of a double-sided deflection guard according to the invention applied to a leaf spring; FIG. 5A and 5B are schematic longitudinal sectional views of a deflection guard approximately as shown in FIG. 4, showing the leaf spring in the respective opposite end positions; and FIG. 6A and 6B are simplified side views of a deflection guard approximately as shown in FIG. 4, applied to a leaf spring in a wheel suspension in a normal position and a deflection-protected limit position, respectively.
    In the drawing, the same reference numerals are used throughout for parts with the same or similar function.
    DETAILED DESCRIPTION OF EMBODIMENTS The deflection guard generally designated 10 in the embodiment of FIG. 1A is shown applied to a deflection-prone area B of an elongate flexurally elastic object 20. The deflection guard 10 includes a support 10A having such a shape that an intermediate enclosing portion 14 of the support 10A is connected to the object 20 by abutment with an exterior 22 of the object 20, while opposite ends 12 of the support 10A are at a distance d from the outside 22, when the object 20 is unloaded or assumes a partially loaded normal position for its deflection.
    In FIG. 1B, the object 20 is shown loaded by a force, e.g. a longitudinal compressive force F, which tends to deflect the object 20 past an unwanted deflection, such as a deflection past the so-called the breaking point. However, such undesired deflection is prevented by the deflection guard 10, which previously responds with a regional stiffening of the object 20, resulting in it being able to withstand a greater such force before deflecting more than desired. More specifically, the opposite ends 12 of the support 10A and its intermediate portion 14 form a bending stop towards the outside 22 of the object when the deflection at the ends 12 reaches a size corresponding to the distance d. The bending stop is further illustrated in FIG. 1B with arrows representing the opposite reaction forces which occur in the deflection guard 10 when it comes into operation. The ends 12 are suitably rounded so as not to cause any stress concentrations of the object 20.
    In FIG. 2 shows a deflection guard 10 which is unilaterally arranged on a flexurally elastic object in the form of a leaf spring 20. The support 10A is in this case connected to the leaf spring 20 via a crosspiece 14 which holds the leaf spring against the support 10 by each a screw connection 18 (only that one is shown) at the opposite longitudinal edges of the leaf spring 20. It is also conceivable to use as connection a one or more screw connections 18 which extend through holes in the leaf spring 20, possibly also via a crosspiece 14, if such an arrangement can be allowed in terms of strength. In this case, it is also conceivable to strengthen the spring, e.g. by locally increasing its width.
    In FIG. 3 shows a deflection guard 10 which is also unilaterally arranged at an upper side of a flexurally elastic object in the form of a leaf spring 20. The support 10A is in this case connected to the leaf spring 20 via a more integrated joint 18, such as an iodine or weld. or adhesive joint, or a unitary connection in that the leaf spring 20 and the support 10A are formed in one piece. FIG. 3 also shows that the support 10A does not need to extend continuously diverging from the object 20 to the opposite ends 12, as in the above example. The opposite ends can e.g. be formed by separate cross pieces 12 connected by a common web 13 of the support 10A. The deflection protection in FIG. 3 can of course also be made double-sided by adding a corresponding support (not shown) at a lower side of the spring 20.
    In FIG. 4 shows a double-sided deflection protection 10, which, as in the embodiment according to FIG. 2 is connected to a leaf spring 20 by a screw connection 18 at each of the opposite longitudinal edges of the leaf spring 20. As most clearly seen in FIG. 5A and 5B, in this case each of the two supports 10A and 10B of the deflection guard 10 is formed by three spaced cross members 12, 14, the opposite ends of which are joined by a pair of side pieces 16 More specifically, the outer cross pieces 12 form the ends of each support 10A, 10B, while the two intermediate cross pieces 14 together with the screw joints 18 form the joint which serves to clamp the leaf spring 10 therebetween. The bending stop of the spring 20 is thus provided in this case by the intermediate crosspiece 14 of one of the supports 10A / 10B together with the two crosspieces 14 of the other support 10B / 10A.
    As further shown in FIG. 5A and 5B, the supports 10A and 10B need not be mutually uniform. For example, they may be differently shaped so that the ends 12 of one support 10A are approximately as far from an adjacent outside 22 of the leaf spring 20 as the ends 12 of the other support 10B when the leaf spring 20 assumes an already bent normal position (shown in phantom). lines in FIGS. 5A and 5B) for their deflection. The leaf spring 22 can then be allowed to be deflected approximately equally far to both holes before the deflection guard 10 comes into operation.
    In FIG. 4, 5A and 5B also indicate the possibility of producing the object 20 with reduced thickness in the deflection-prone area.
    FIG. 6A shows a deflection guard according to the embodiment of FIG. 4 applied to a deflection-prone area B of a leaf spring 20 of a schematic and only partially manufactured wheel suspension 32 of a motor vehicle 30, not shown in more detail. via the leaf spring 20. The front end of the leaf spring 20 is connected to a front frame beam bracket 40 and its rear end is connected via a link 42 to a rear frame beam bracket 44. The middle portion of the leaf spring 20 is in a manner not shown in more detail connected to the wheel axle 34.
    When the vehicle 30 is braked during reversing, i.e. when driving to the right in FIG. 6A, the wheel axle 34 will move to the left relative to the frame beam 36, approximately in the manner shown in FIG. 6B, so that the left part of the leaf spring 20 is subjected to a longitudinal compressive force F. A sufficiently large compressive force F can increase the deflection - depending on varying load situations the spring 20 can also be deflected in a direction opposite to that shown - by this part of the spring 20, so that it risks coming into harmful contact with other vehicle components or even breaks at the area B. Before the deflection reaches an undesired level, however, the bending stop of the deflection guard 20 according to the invention intervenes and stiffens the spring 20 over the length of the deflection guard 10. , in the manner described above, so that it can withstand compressive forces that would otherwise deflect the spring too much. In this and other embodiments of the invention, a steel deflection guard 10 may be treated with shot peening to increase the strength when necessary.
    Many modifications to the deflection protection are possible. For example, it may in a manner not shown be dimensioned for use on an object composed of several elements, such as several leaf springs.
    The above detailed description is primarily intended to facilitate understanding and any unnecessary limitations of the invention are not to be construed as such. The modifications 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.
    权利要求:
    Claims (10)
    [1]
    Deflection protection (10) for a flexural elastic object, comprising a support (10A, 10B) for the object at a deflection-prone area (B) along the object, characterized in that the support comprises a pair of opposite ends (12) and a joint (14, 18 ) between the ends for connection to the object at the deflection-prone area (B), the ends being located so that in a normal position for a deflection of the object they are arranged at a distance (d) from the object to form together with the connection (14, 18) a bend stop for the object in a deflection protection limit position for the deflection of the object.
    [2]
    Deflection protection according to claim 1, characterized in that the support (10A) is arranged to at least partially enclose the object (20).
    [3]
    Deflection protection according to Claim 1 or 2, characterized in that the dressing comprises a releasable dressing (18).
    [4]
    Deflection protection according to Claim 1 or 2, characterized in that the dressing comprises an insoluble dressing (18).
    [5]
    Deflection protection according to one of the preceding claims, characterized in that the ends (12) comprise a pair of cross pieces (12) of the support (10).
    [6]
    Deflection protection according to one of the preceding claims, characterized in that the joint comprises a crosspiece (14) of the support (10A, 10B).
    [7]
    Flexible elastic object (20) for a deflection protection device according to one of the preceding claims, characterized in that it has a reduced thickness in a plane for its deflection at the deflection-prone area (B).
    [8]
    Flexible elastic object (20) provided with a deflection protection (10) according to any one of claims 1-6.
    [9]
    Use of a deflection guard according to any one of claims 1-6 for a leaf spring (20) in a wheel suspension (32) of a motor vehicle (30).
    [10]
    Motor vehicle (10) with a leaf spring (20) in a wheel suspension (32) provided with a deflection protection according to any one of claims 1-6.
    类似技术:
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    同族专利:
    公开号 | 公开日
    BR102012025976A2|2013-11-26|
    SE536144C2|2013-05-28|
    EP2589832B1|2019-09-25|
    EP2589832A2|2013-05-08|
    EP2589832A3|2017-12-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1867203A|1930-04-07|1932-07-12|William C Blackmore|Combined spring clip and snubber|
    FR1133712A|1955-10-17|1957-04-01|Manuf Fr Des Ressorts Guillott|Leaf spring suspension|
    US3376033A|1966-05-02|1968-04-02|Gen Motors Corp|Unitized composite spring construction|
    FR1521586A|1967-03-09|1968-04-19|Ressorts Du Nord Sa|Leaf spring with variable flexibility|
    法律状态:
    2021-06-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1151019A|SE536144C2|2011-11-01|2011-11-01|Deflection guard for leaf spring|SE1151019A| SE536144C2|2011-11-01|2011-11-01|Deflection guard for leaf spring|
    BR102012025976-1A| BR102012025976A2|2011-11-01|2012-10-10|DEFLECTION PROTECTION|
    EP12190369.4A| EP2589832B1|2011-11-01|2012-10-29|Deflection protection|
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