• 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:

    公开号:BE1019742A3
    申请号:E2010/0383
    申请日:2010-06-29
    公开日:2012-12-04
    发明作者:Alexander Knecht；Peter Orfey
    申请人:Terex Demag Gmbh；
    IPC主号:
    专利说明:

    DESCRIPTION
    Telescopic boom for cranes, in particular mobile cranes
    The invention relates to a telescopic boom for cranes, in particular mobile cranes, with a main boom, which has a base box and several telescopically extendable and retractable shots and the base box and the telescopic sections consist of profiles, which are made of sheets and each of which an upper and a lower half-shell, whose oppositely directed legs are welded together.
    Such a telescopic boom is known from DE 199 48 830 B4 or DE 197 11 975 A1.
    The wall thickness of the upper shell is usually lower than that of the lower shell in order to accommodate the different loads weight optimized.
    In this context, it should be mentioned that one often speaks of a Nominalwanddicke, which means that when rolling the sheets are not completely unavoidable small thickness variations in both the transverse and in the longitudinal direction out of consideration.
    The design of the wall thickness for the area of greatest loads very much determines the weight of the boom. Overall, the total weight is of course determined by the desired boom length and the necessary number of telescopic shots.
    Restrictions on the maximum buildable boom weight, overall boom length and buildable boom height can be found in the Road Traffic Licensing Regulations, which include maximum axle load, headroom and max. Building lengths dictates.
    For this reason, efforts are made to keep the weight of the boom as low as possible and to achieve a high profile stiffness in the available space.
    DE 199 48 830 B4 proposes for this purpose to produce the lower shell in sandwich construction, namely from two spaced comparatively thinner sheets with a provided between them, the gap completely or partially filling, filler. This filler may be a metal foam.
    Regardless, it was known to produce the sheets in the so-called Nominalwanddicke and then aufzuschweißen locally sheet metal sections or lamellae.
    However, this has the disadvantage that it can lead to material or structural changes in the weld seams, which adversely affect the overall strength.
    Furthermore, resulting from the introduced during welding stresses welding distortions that must be removed by a subsequent straightening the boxes again. This straightening itself creates tensions and can lead to inconsistencies, which is noticeable especially during the subsequent assembly process and in later operation by an uneven wearing and wear pattern.
    The invention is therefore an object of the invention to provide a telescopic boom for cranes, which is relatively simple to manufacture, it is dimensionally stable and low distortion and yet meets the demands placed on it for high load capacity with reduced weight.
    This object is achieved by a telescopic boom for cranes, especially mobile cranes, with a main boom, which has a base box and several telescopically extendable and retractable shots and the base box and the. Teleskopschüsse consist of profiles that are made of sheets and each of which has an upper and a lower half shell whose oppositely directed legs are welded together, which is characterized in that the sheets for the base box as well as the telescopic shots in the Made by rolling locally reinforced sheets.
    If local reinforcements are intentionally produced during the production of the semi-finished products during rolling, this has the advantage that the microstructure does not change, ie it can be assumed that a homogeneous material with a balanced tension pattern is used. Thus, it is no longer necessary to take into account in the calculation of the locally required wall thickness, for example by the welding of reinforcements caused material weakenings and additional weight, so that on the one hand, the dependence of the load capacity of the wall thickness is easier to represent and on the other hand weight savings result overall.
    Another advantage, of course, is the fact that the corresponding semi-finished products (sheets) are delivered ready by the manufacturer, so that eliminates the own profile edges and the costly subsequent welding of local reinforcements.
    The invention will be explained below on a schematically illustrated embodiment, namely a correspondingly formed half-shell.
    In the drawing, for example, a lower shell is shown, and schematically in cross section.
    It can be seen that the shell has different wall thicknesses, wherein the reinforcements 1 and 5 are here in the region of the leg ends, the so-called webs and the reinforcement 3 in the apex area, the so-called upper belt area and lower belt area. The intermediate areas have a normal, ie nominal wall thickness.
    In the drawing, a conventional cross-sectional shape is shown. The invention is not limited to these, but it can be used in the same way and rectangular cross sections.
    As already mentioned, the different sheet thicknesses are preferably produced by cold rolling of previously produced sheets, the rolls being opened and closed in accordance with the desired wall thickness. In practice, these sheets are referred to as tailored rolled blanks (TRB).
    Also possible is the use of caliber rolls for the production of locally reinforced sheets.
    权利要求:
    Claims (4)
    [1]
    1. Telescopic boom for cranes, especially mobile cranes, with a main boom, which has a base box and a plurality of telescopically extendable and retractable shots and the base box and the telescopic sections consist of profiles, which are made of semi-finished or sheet metal and each of which an upper and a lower half-shell, whose oppositely directed legs are welded together, characterized in that the semi-finished products or sheets for the base box as well as the telescopic shots made in the manufacture by rolling locally reinforced sheets.
    [2]
    2. Telescopic boom according to claim 1, characterized in that the local reinforcements are in the region of the leg ends of the half-shells and in the apex region.
    [3]
    3. telescopic boom according to claim 1, characterized in that the local reinforcements are in the range of Profilaussenkanten.
    [4]
    4. telescopic boom according to claim 1, characterized in that the local reinforcements are in the region of the upper or lower flange.
    类似技术:
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    CH658227A5|1986-10-31|RUNGE FOR A GOOD VEHICLE, IN PARTICULAR RAILWAY FLAT.
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    同族专利:
    公开号 | 公开日
    DE202009009143U1|2009-09-03|
    DE102010026253A1|2011-01-13|
    JP5902882B2|2016-04-13|
    JP2011016662A|2011-01-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19711975A1|1997-03-12|1998-09-17|Mannesmann Ag|Telescopic jib for vehicle crane|
    DE10030190A1|1999-06-22|2001-05-31|Atecs Mannesmann Ag|Telescopic boom for vehicle cranes has telescopic arms with profiled shell made from profiled sheet metal with varying nominal wall thickness adapted to load but with constant internal hollow dimensions|
    DE19948830A1|1999-10-06|2001-04-19|Mannesmann Ag|Telescopic boom for cranes|
    JPS58187280A|1982-04-24|1983-11-01|Kyoritsu Kinzoku Kogyo Kk|Welding method and its base material|
    JPH0211431Y2|1984-10-02|1990-03-22|
    JPH0735494U|1993-12-13|1995-07-04|株式会社アイチコーポレーション|Telescopic boom|
    JP2821095B2|1994-01-24|1998-11-05|大和ハウス工業株式会社|Column / beam joint structure|
    JP2007508177A|2003-10-08|2007-04-05|ベールゲーエムベーハーウントコーカーゲー|Use of components, especially hybrid components and components for vehicle lateral supports|
    JP2006021877A|2004-07-08|2006-01-26|Tadano Ltd|Telescopic boom|DE202010006624U1|2010-05-10|2010-08-05|Manitowoc Crane Group France Sas|Crane jib, in particular mobile crane jib, with prestressed tension elements|
    US9290363B2|2011-07-21|2016-03-22|Manitowoc Crane Companies, Llc|Tailor welded panel beam for construction machine and method of manufacturing|
    CN102408062B|2011-09-20|2014-07-16|徐州重型机械有限公司|Supporting leg and applied crane thereof|
    DE102012001184B4|2012-01-24|2015-02-12|Böcker AG|Crane with a telescopic mast system|
    CN102837161B|2012-09-04|2015-04-22|南阳二机石油装备有限公司|Manufacturing method and positioning and clamping device of telescopic boom body of crane|
    DE102015122410A1|2015-12-21|2017-06-22|GEDIA Gebrüder Dingerkus GmbH|Process for the production of components with finished areas mainly of metal as well as a component with finished areas|
    DE102015122396A1|2015-12-21|2017-06-22|GEDIA Gebrüder Dingerkus GmbH|Process for producing a composite component / composite product and composite component / composite product|
    DE102015122395A1|2015-12-21|2017-06-22|GEDIA Gebrüder Dingerkus GmbH|Process for the production of cold and / or hot formed components substantially of metal and / or sheet metal and cold and / or hot formed component substantially of metal and / or sheet metal|
    法律状态:
    2019-01-23| HC| Change of name of the owners|Owner name: TEREX CRANES GERMANY GMBH; DE Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), CHANGEMENT DE NOM DU PROPRIETAIRE; FORMER OWNER NAME: TEREX DEMAG GMBH Effective date: 20181207 |
    2019-01-23| PD| Change of ownership|Owner name: TEREX GLOBAL GMBH; CH Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), CESSION; FORMER OWNER NAME: TEREX CRANES GERMANY GMBH Effective date: 20181207 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE200920009143|DE202009009143U1|2009-07-07|2009-07-07|Telescopic boom for cranes, in particular mobile cranes|
    DE202009009143|2009-07-07|
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