• 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:
    A suspension of a vehicle, in particular a medium or heavy truck has an axle (3) and a spring (1). The spring (1), in particular leaf spring (1), has an elongated spring body (4) with two longitudinal ends and a central region (7), wherein the spring body (4) consists of a composite material. The central region (7) of the spring body (4) has a greater base thickness than the rest of the spring body (4), wherein in the central region (7) of the spring body (4) an elongated slot (8) as a recess (8) is, which extends substantially transversely to the longitudinal extent of the spring body (4). On the surface of the central region (7) of the spring body (4) fibers (10), in particular glass fibers, are arranged, which extend substantially parallel to the recess (8) and are preferably arranged on both longitudinal sides of the recess (8).
    公开号:AT516366A1
    申请号:T751/2014
    申请日:2014-10-06
    公开日:2016-04-15
    发明作者:Sébastien Brogly；Séverin Marteau-Lorant；Franck Charvieux
    申请人:Frauenthal Automotive France S A S；
    IPC主号:
    专利说明:

    The invention relates to a spring, in particular leaf spring, for a wheel suspension of a vehicle, the spring having an elongate spring body with two longitudinal ends and a central region and wherein the spring body consists of a composite material.
    In addition, the invention relates to a suspension of a vehicle with an axle and a spring.
    Moreover, the invention relates to a vehicle, in particular a medium or heavy truck.
    In motor vehicles, a distinction is made between passenger cars and lorries (trucks), with the requirements relating to the suspension or the suspension being different due to the loads to be transported. For trucks, a distinction is also made between light trucks ("light trucks", up to 7.5 tons), medium trucks ("trucks", from 7.5 tons to 12 tons) and heavy trucks ("heavy trucks", from 12 tons) , wherein the requirements with respect to the suspension or the suspension in turn are different due to the loads to be transported.
    Suspension springs are generally designed to allow good ride characteristics and a long life span, which is particularly dependent upon the loadability and durability of the material of which the spring is made. The use of spring steel and composite material as the material for such springs is known.
    Furthermore, it must be ensured that the spring, which is usually connected by screws to the axle, is sufficiently fixed (by the screws). When using spring steel, the screws can be fastened with a higher torque, thereby ensuring a secure fixation. A composite spring typically uses less torque to avoid damaging the composite.
    The invention is based on the object to enable a spring and a wheel suspension of a vehicle, which has the longest possible lifespan, in particular a
    Slippage of the spring greatly reduced with respect to the axis. is avoided. In addition, it is an object of the invention to enable the spring to be attached with adequate torque without the spring breaking. In particular, it is an object of the invention to avoid slippage and / or breakage of the spring in the event of a collision of the spring with other components of the suspension, which may happen especially during a braking operation.
    This object is achieved according to the invention with a spring having the features of claim 1.
    In addition, the object is achieved with a suspension according to the invention, which has the features of claim 9.
    Moreover, the object is achieved according to the invention with a vehicle having the features of claim 19.
    Preferred and advantageous embodiments of the invention are the subject of the subclaims.
    According to the invention, it is provided that the central region of the spring body has a greater base thickness than the rest of the spring body, and that a depression is provided in the middle region of the spring body. Thus, it is possible that a moderately lightweight spring could be made for medium and heavy trucks as well, from a lighter composite material compared to spring steel, greatly reducing the risk of breakage of the spring and the risk of the spring slipping.
    In a preferred embodiment of the invention, it is provided that the recess is an elongated slot which runs essentially transversely to the longitudinal extension of the spring body.
    The composite of the spring advantageously comprises glass fibers as reinforcing elements. Additionally or alternatively, the composite includes thermosetting resin or thermoplastic resin. In particular, it can be provided that the composite material comprises polyurethane and / or polyamide and / or polyester.
    Within the scope of the invention, it is preferred if the hardness of the composite material when using thermoset material in the range of > 90 shore D is located. When using thermoplastic material, this may have a lower hardness in the context of the invention than thermosetting material.
    In particular, it is preferred if fibers, for example glass fibers, are arranged on the surface of the spring body, which extend substantially parallel to the longitudinal extension of the spring body, in particular from the region of a longitudinal end to the region of the opposite longitudinal end of the spring body. Thus, despite its comparatively low weight, the spring is reinforced, with the risk of the spring break being further reduced and counteracting slippage of the spring. During a braking operation, an increased pressure is exerted on the spring. In order to avoid that the fibers arranged substantially parallel to the longitudinal extension of the spring body then come loose, in one embodiment of the invention it is advantageously provided that fibers are arranged on the surface of the central region of the spring body, which run essentially transversely to the longitudinal extension of the spring body. In an advantageous development it is provided that the fibers are substantially parallel to the recess and preferably arranged on both longitudinal sides of the recess.
    The fibers extending substantially parallel to the longitudinal extent of the spring body as well as substantially transverse to the longitudinal extent of the spring body may be arranged directly on the spring body. They may also be arranged indirectly on the spring body, e.g. on an intermediate layer, wherein the intermediate layer may be disposed directly on the spring body. These fibers, unlike glass fibers of the composite, are not disposed within the spring body.
    According to the invention, a wheel suspension is additionally provided with an axle and a spring according to the invention. It is understood that two springs according to the invention (one spring for each wheel) can be arranged on the axle.
    In a preferred embodiment of the invention, the recess in the spring body is disposed on the side of the spring body which is in position of use with respect to the axis. The recess may additionally be arranged on the opposite side of the spring body.
    Slippage of the spring can be avoided particularly effectively if a cover part, in particular a plate, preferably a steel plate, is arranged in the middle region of the spring body and has a projection which corresponds in shape and size to the depression arranged in the central region of the spring body. In a particularly preferred embodiment, the projection of the cover engages the recess of the spring body.
    If the cover member, particularly the steel plate, collides with the spring body, there is a risk that the spring body will be damaged. This risk is especially increased during a braking process. In particular, the (glass) fibers on the surface of the spring body may be damaged. In order to avoid this, it is advantageously provided that an intermediate piece is arranged between the spring body and the cover part. In a particularly secure embodiment of the invention, the hardness of the intermediate piece is less than the hardness of the spring body, in particular in the region between 30shore D and 90 shore D, wherein the intermediate piece is preferably made of rubber or of thermoplastic material.
    The pressure exerted on the intermediate piece can lead to a distortion of the intermediate piece, whereby the length and / or the width of the intermediate piece increases. To avoid this, the cover part in an advantageous development on the side facing the spring body on a recess which corresponds in shape and size with the intermediate piece, wherein in particular the intermediate piece is arranged in the recess of the cover part form fit.
    In the context of the invention it is further preferred that the cover part is designed and arranged on the intermediate piece such that the cover part is not in contact with the spring body even in areas in which no intermediate piece is provided between the spring body and the cover part. In the context of the invention, it is therefore provided that a gap is provided between the cover part and the spring body. Thus, the cover member is prevented from applying pressure to the spring body.
    In the context of the invention is advantageously provided that the spring body is connected via U-bolts to the axle.
    The spring according to the invention and the wheel suspension according to the invention are usable both for a front and rear wheel suspension of a vehicle. In particular, the use of a front wheel suspension is advantageous, since during a braking operation the wheel suspension for the front wheels is particularly stressed and thus, in particular, the breakage of the spring the braking process is avoided.
    The invention relates in particular to a spring for a wheel suspension for front wheels of a vehicle.
    Further details, features and advantages of the invention will become apparent from the following description with reference to the accompanying drawings, in which preferred embodiments are shown.
    1 shows an embodiment of a wheel suspension according to the invention with an embodiment of a spring according to the invention, FIG. 2 shows a section of a spring according to the invention in the central area of the spring body, FIGS. 3 and 4 show sections of a spring according to the invention in the central area of the spring body in a sectional view, FIG. 5 shows an embodiment of an inventive device Fig. 6 shows an embodiment of a spring according to the invention with partially indicated transverse fibers in the central region of the spring body, Fig. 7 shows an embodiment of a construction of spring body, intermediate piece and cover part in FIG
    Exploded view ,. 8 shows an embodiment of intermediate piece and cover part in an exploded view, and FIG. 9 shows the intermediate piece and the cover piece according to FIG. 8 in the assembled state.
    Fig. 1 shows a suspension of a truck over 7.5 t, in which a spring 1 is connected in the form of a leaf spring 1 via U-bolts 2mit the axis 3 of the truck. The spring 1 has an elongate composite spring body 4 having a rolled eye 5 at both longitudinal ends. About the eyes 5, the spring body 4 is connected to the chassis 6 of the truck.
    Depending on the nature of the spring 1, both longitudinal ends may have an eye 5. Also, a longitudinal end may be a rolled or formed, e.g. in the spring body 4 introduced, have eye 5, whereas the other longitudinal end is substantially flat. In the last-mentioned embodiments, the spring body 4 may be angled or bent, in particular in the region of the flat longitudinal end. In another embodiment, both ends may be substantially flat and possibly slightly cranked (without eye).
    The central region 7 of the spring body 4 has a greater base thickness than the rest of the spring body 4, wherein in the central region 7 of the spring body 4, as shown in Fig. 2, a recess 8 is provided. The recess 8 is designed as an elongated slot 8, which extends transversely to the longitudinal extent of the spring body 4. The larger base thickness of the spring body 4 in its central region 7 is achieved by an increase. In the illustrated embodiment, an elevation on one side of the spring body is evident. It may also be provided on the opposite side a second increment. The areas of the spring body 4 adjoining the central area 7 may, for example, have a height (base thickness) of approximately 64 mm. The increase in the central area 7 can each have an additional height of about 8mm. Thus, if such elevations are provided on two opposite sides of the spring body 4, the central area 7 of greater base thickness may have a height of approx. 80 mm.
    In the embodiments according to Figs. 3 and 4, the central area 7 of greater base thickness may have a length of about 68 mm and a width of about 59.5 mm. These values may vary according to the embodiment of spring 1. The slot 8 may have a length of about 47 mm and a width of about 16.5 mm.
    Fig. 5 shows an embodiment of a spring according to the invention in which on the surface of the spring body 4 fibers 9 are arranged, which run substantially parallel to the longitudinal extent of the spring body 4 from the region of a longitudinal end to the region of the opposite longitudinal end of the spring body (longitudinal fibers 9). In addition to the longitudinal fibers 9, fibers 10 may be arranged on the surface of the central region 7 of the spring body 4, which extend substantially transverse to the longitudinal extension of the spring body 4 (transverse fibers 10). As shown in FIG. 6, the transverse fibers 10 may be substantially parallel to the recess and disposed on both longitudinal sides of the recess 8.
    Fig. 7 shows that on each of two opposite sides of the spring body a recess 8 is provided, namely on the side of the spring body 4, which is in use position to the axis 3 also on the opposite side of the spring body 4th
    In order to design a system for a wheel suspension preinstalled by a supplier, a cover part 11 is arranged in the middle region 7 of the spring body 4, which in the illustrated embodiment is a steel plate 11. The cover part 11, as shown in particular in FIGS. 8 and 9, has a projection 12 which corresponds in shape and size to the recess 8 arranged in the central region 7 of the spring body 4 and which, in the assembled state of the cover part 11, engages in the recess 8 of the spring body 4 in a form-fitting manner ,
    In order to avoid that pressure is exerted on the softer spring body 4 by the cover part 11, an intermediate piece 13 is arranged between the spring body 4 and the cover part 11 and has a lower hardness than the spring body 4. The cover part 11 has a recess on the side facing the spring body 4 14, which corresponds in shape and size with the intermediate piece 13, so that the
    Intermediate piece 13 can be arranged in a form-fitting manner in the recess 14 of the cover part 11 (FIG. 8). The intermediate piece 13 has a recess 15 which corresponds in shape and size to the recess 8 arranged in the middle region 7 of the spring body 4 and is arranged above the recess 8 in the mounted state. The projection 12 of the cover member 11 penetrates the recess 15 in the assembled state (Fig. 9).
    In Fig. 2 the support area for the intermediate piece 13 is indicated by way of example, which may be about 150 mm long and about 80 mm wide.
    权利要求:
    Claims (19)
    [1]
    A spring, in particular leaf spring (1), for a wheel suspension of a vehicle, the spring (1) comprising an elongated spring body (4) with two longitudinal ends and a central region (7), and wherein the spring body (4) consists of a composite material, characterized in that the middle region (7) of the spring body (4) has a greater base thickness than the rest of the spring body (4), and in that a depression (8) is provided in the middle region (7) of the spring body (4).
    [2]
    A spring according to claim 1, characterized in that the recess (8) is an elongated slot (8) extending substantially transversely to the longitudinal extent of the spring body (4).
    [3]
    A spring according to claim 1 or 2, characterized in that the composite comprises glass fibers which are preferably embedded as reinforcing elements in the plastic of the composite material.
    [4]
    A spring according to any one of claims 1 to 3, characterized in that the composite comprises thermosetting resin or thermoplastic resin.
    [5]
    5. Spring according to claim 4, characterized in that the composite material comprises polyurethane and / or polyamide and / or polyester.
    [6]
    A spring according to any one of claims 1 to 5, characterized in that fibers (9), in particular glass fibers, are arranged on the surface of the spring body (4), substantially parallel to the longitudinal extension of the spring body (4), in particular from the region of a longitudinal end to the region the opposite longitudinal end of the spring body (4) run.
    [7]
    A spring according to any one of claims 1 to 6, characterized in that fibers (10), in particular glass fibers, are arranged on the surface of the middle region (7) of the spring body (4) and extend substantially transversely to the longitudinal extension of the spring body (4).
    [8]
    A spring according to claim 7, characterized in that the fibers (10) extend substantially parallel to the recess (8) and are preferably arranged on both longitudinal sides of the recess (8).
    [9]
    A wheel suspension of a vehicle having an axle (3) and a spring (1), characterized in that it comprises a spring (1) according to any one of claims 1 to 9.
    [10]
    A wheel suspension according to claim 9, characterized in that the recess (8) is arranged in the spring body (4) on the side of the spring body (4) facing the axis (3) in use, and optionally also on the opposite side of the spring body (4). ,
    [11]
    A wheel suspension according to claim 9 or 12, characterized in that in the middle region (7) of the spring body (4) a cover part (11), in particular a plate, preferably a steel plate (11) is arranged, which has a projection (12) in shape and size with the in the central region (7) of the spring body (4) arranged recess (8) corresponds.
    [12]
    A wheel suspension according to claim 11, characterized in that the projection (12) of the cover part (11) engages in the recess (8) of the spring body (4).
    [13]
    A wheel suspension according to any one of claims 9 to 12, characterized in that an intermediate piece (13) is arranged between the spring body (4) and the cover part (11).
    [14]
    The wheel suspension according to claim 13, characterized in that the cover part (11) is designed and arranged on the intermediate piece (13), that the cover part (11) also in areas where no intermediate piece (13) between the spring body (4) and the cover part (11) is provided, is arranged at a distance from the spring body (4).
    [15]
    15. Wheel suspension according to claim 13 or 14, characterized in that the intermediate piece (13) has a recess (15) which corresponds in shape and size with the central region (7) of the spring body (4) arranged recess (8) and above the Recess (8) is arranged, wherein the projection (12) of the Abde.ckteils (11) penetrates the recess (15).
    [16]
    16. Wheel suspension according to one of claims 13 to 15, characterized in that the hardness of the intermediate piece (13) is less than the hardness of the spring body (4), in particular in the region between 30 shore D and 90 shore D, wherein the intermediate piece (13 ) is preferably made of rubber or of thermoplastic material.
    [17]
    17. Suspension according to one of claims 11 to 16, characterized in that the cover part (11) on the spring body (4) side facing a recess (14) which corresponds in shape and size with the intermediate piece (13).
    [18]
    18. Wheel suspension according to claim 17, characterized in that the intermediate piece (13) is arranged in particular in a form-fitting manner in the recess (14) of the cover part (11).
    [19]
    Vehicle, in particular medium-weight or heavy-duty truck, characterized in that it has a wheel suspension according to one of claims 10 to 18.
    类似技术:
    公开号 | 公开日 | 专利标题
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    DE102012008060A1|2013-10-24|Composite component e.g. B-pillar for motor car, has macroscopic cavity that is arranged between reinforcing patch and base portion
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    EP3550172A1|2019-10-09|Leaf spring holder for connecting a leaf spring with an axle and chassis provided with such a leaf spring holder
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    DE102013203848A1|2014-09-11|Drive axle for an industrial truck
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    EP3550171B1|2020-06-17|Leaf spring for a vehicle and method of manufacturing such a leaf spring
    DE102015108484A1|2016-12-01|Transverse leaf spring for a motor vehicle and axle assembly with a transverse leaf spring
    DE202016105784U1|2017-02-24|Suspension suspension
    DE102018206955A1|2019-11-07|Axle
    EP3230616B1|2018-08-22|Spring for a vehicle
    DE102018201971A1|2019-08-08|Connector for transversal suspension system
    DE102016209689A1|2017-12-07|Two-piece suspension unit
    DE102010051560A1|2012-05-24|Leaf spring and method for producing such a leaf spring
    DE202016103196U1|2016-07-06|Two-piece suspension unit
    DE102014108516B3|2015-05-21|Leaf spring assembly
    同族专利:
    公开号 | 公开日
    EP3006237A1|2016-04-13|
    EP3006237B1|2018-04-04|
    AT516366B1|2017-01-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4611793A|1984-06-21|1986-09-16|Toyota Jidosha Kabushiki Kaisha|Leaf spring assembly for wheel suspension|
    US4598900A|1984-06-25|1986-07-08|Toyota Jidosha Kabushiki Kaisha|FRP leaf spring suspension|
    US4895350A|1988-08-01|1990-01-23|A. O. Smith Corporation|Axle mount construction for a fiber reinforced resin leaf spring|
    DE102009028895A1|2009-08-26|2011-03-03|Zf Friedrichshafen Ag|Bearing device of a transverse leaf spring|
    JPS5124055B2|1971-12-20|1976-07-21|
    LU80296A1|1978-09-28|1980-04-21|Bekaert Sa Nv|STRUCTURES DAMPING MECHANICAL VIBRATIONS|
    JPS5790434A|1980-11-28|1982-06-05|Hino Motors Ltd|Leaf spring for vehicle|
    US4684110A|1985-12-02|1987-08-04|Ford Motor Company|Leaf spring clamp with attachment means|
    JPS63225738A|1987-03-12|1988-09-20|Mazda Motor Corp|Leaf spring for vehicle|
    US7744105B2|2008-04-15|2010-06-29|Hendrickson Usa, L.L.C.|Isolated spring clamp group|
    DE102011012654A1|2011-02-28|2012-08-30|Benteler Sgl Gmbh & Co. Kg|Process for producing a leaf spring as a fiber composite component and leaf spring|
    US9050870B2|2012-05-30|2015-06-09|Hendrickson Usa, L.L.C.|Energy storing suspension components having retention recesses|
    US20140284856A1|2013-03-15|2014-09-25|Gordon Holdings, Inc.|Light weight composite leaf spring and method of making|DE102016006641A1|2016-06-02|2017-12-07|Daimler Ag|Leaf spring for a vehicle|
    AT520413A1|2017-09-14|2019-03-15|Hendrickson Comm Vehicle Sys Europe Gmbh|A leaf spring for use in conjunction with a suspension of a vehicle|
    DE102017218795B4|2017-10-20|2021-05-27|Ford Global Technologies, Llc|Axle suspension|
    CN111791656B|2020-06-30|2021-06-08|东风商用车有限公司|Thickness-adjustable leaf spring backing plate|
    法律状态:
    2017-03-15| PC| Change of the owner|Owner name: HENDRICKSON COMMERCIAL VEHICLE SYSTEMS EUROPE , AT Effective date: 20170131 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA751/2014A|AT516366B1|2014-10-06|2014-10-06|Spring for suspension and suspension|ATA751/2014A| AT516366B1|2014-10-06|2014-10-06|Spring for suspension and suspension|
    EP15450033.4A| EP3006237B1|2014-10-06|2015-09-24|Spring for wheel suspension and wheel suspension|
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