EP3971125B1 - Hochfeste auslegerstruktur - Google Patents

Hochfeste auslegerstruktur Download PDF

Info

Publication number
EP3971125B1
EP3971125B1 EP20208793.8A EP20208793A EP3971125B1 EP 3971125 B1 EP3971125 B1 EP 3971125B1 EP 20208793 A EP20208793 A EP 20208793A EP 3971125 B1 EP3971125 B1 EP 3971125B1
Authority
EP
European Patent Office
Prior art keywords
bending
boom
points
angle
different
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20208793.8A
Other languages
English (en)
French (fr)
Other versions
EP3971125A1 (de
Inventor
Bahtiyar ERKIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Erkin Ismakinalari Insaat Sanayi Ithalat Ihracat Ticaret Pazarlama Ltd Sirketi
Original Assignee
Erkin Ismakinalari Insaat Sanayi Ithalat Ihracat Ticaret Pazarlama Ltd Sirketi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erkin Ismakinalari Insaat Sanayi Ithalat Ihracat Ticaret Pazarlama Ltd Sirketi filed Critical Erkin Ismakinalari Insaat Sanayi Ithalat Ihracat Ticaret Pazarlama Ltd Sirketi
Publication of EP3971125A1 publication Critical patent/EP3971125A1/de
Application granted granted Critical
Publication of EP3971125B1 publication Critical patent/EP3971125B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic

Definitions

  • the invention relates to booms used in the cranes, enables the crane to reach far distances by telescoping.
  • the invention is particularly related to booms obtained by forming two different sheet plates to be used as upper and lower parts by bending them many times and thus obtaining booms with high strength.
  • cranes are used for the operations such as lifting and transferring all kinds of loads, loading and unloading. While the foldable cranes can be used in narrow areas effectively and under the roofs; telescopic crane is generally used in open areas where length in meters is required.
  • Telescopic and folding boom cranes consist of telescopic booms. Easy access to the loads at a long distance/depth is provided with the extension of these booms sliding over each other and the location of the loads can be changed easily.
  • the load to be lifted is engaged to the boom as it is known in the boom profile and engaged load forms buckling and bending force on the boom.
  • the load applied to the end of the boom applies tension force to the upper part of the boom and applies compression force to the lower part of the boom.
  • Booms that are produced in the prior art are generally formed by bending a single piece of high strength steel sheet several times and subsequently joining the same from the upper or lower part of the boom by means of welding.
  • the upper part is formed by bending from 3 points; the lower part is formed by bending from 3 or 5 points. This cannot fulfill the strength value of the boom structure.
  • the invention relates to a boom mouth strip structure which is developed to eliminate the deformations on the boom end portions that occur during use of crane in the boom extension systems of the foldable boom cranes.
  • steel plates which are placed mutually and the strength of which are increased by placing reinforcement plates and extension cylinder connection plates between them, are used.
  • a support plate is added to the mouth portion so as to reinforce the boom structure in the first application mentioned above.
  • An improvement is made in the profile section in the other application.
  • the required strength values cannot be obtained since the number of bends in the general structure of the boom is few in these two applications. Therefore, these applications can be referred as examples to the above mentioned disadvantages.
  • the invention is related to crane booms which is different from the structures used in the state of the art, is developed to solve said disadvantages and brings some additional advantages.
  • the inventive boom structure is formed by joining two separate sheet plates that are different from each other at certain points.
  • the purpose of the invention is to change the lower and upper thicknesses of the boom by producing the same from two different parts. Moreover, steels with different strength can be used in the upper and lower sections. Thus, the weight of the boom is reduced.
  • Another purpose of the invention is to eliminate the requirement of specific welding method and labor for the welding process made from this surface since the sections to be affected least from the stresses on the boom are the side surfaces.
  • Another aim of the invention is to increase the strength of this part by forming the lower part by bending the same from 9 points. Therefore, it will be resistive against the highest pressure. In general, the buckling resistance of the boom under excessive load is increased.
  • the upper part is formed by bending the same at 5 points so as to meet the tensile strength affecting the upper surface during lifting load. Therefore, the pressure force affecting the upper section of the boom is distributed to 4 small parts equally.
  • the upper section of the boom can be produced from a thinner sheet metal by means of this method. This helps to decrease the weight of the boom.
  • the crane (1) consists of telescoping booms (10) which can be opened and closed.
  • the general structure of the crane (1) is given.
  • minimum one and maximum ten booms (10) are inserted within one main boom. These booms (10) provide to extend the length of the crane by coming out from each other longitudinally by being controlled hydraulically and mechanically.
  • the invention relates to the production phase of the boom (10) which is formed by bending 2 different sheet plates, the upper part (11) and the lower part (12), in the bending machine.
  • the weld grooves (13) found in these two parts is positioned on top of each other and welding is performed from this section. In other words, welding grooves are positioned both sides of the boom. With this method, welding is protected from high tensile forces.
  • Figure 3 shows the sectional view of the upper part (11) and the lower part (12) which are mounted to each other by means of welding.
  • the upper part (11) and the lower part (12) can be produced with different thicknesses since the boom (10) consists of two separate parts. Therefore, the weight of the boom (10) can be decreased.
  • High amount of pressure affects the lower part of the boom due to the load applied to the end of the boom (10) during use.
  • the lower part (12) is formed by bending from 9 different bending points (14) so as to decrease the pressure force that comes under the boom and to increase the strength of the lower part.
  • 9 different bending points (14) at which the lower part (12) is bent is seen. Therefore, the pressure force affecting the lower part of the boom (10) is distributed to 8 small parts equally.
  • This bending method substantially increases the strength of the lower part (12) of the boom (10). In general, the buckling resistance of the boom (10) under excessive load is increased.
  • the 2 nd biggest force that affects the boom (10) is the tensile force affecting the upper surface of the boom (10).
  • the upper part (11) of the boom (10) is formed by bending from 5 different bending points (14) so as to decrease the tensile force that comes on the boom (10) and to increase the strength of the upper part. Therefore, the pressure force affecting the upper part (11) of the boom (10) is distributed to 4 small parts equally.
  • the upper section (11) of the boom (10) can be produced from a thinner sheet metal by means of this method. This helps to decrease the weight of the boom (10).
  • Figure 4 shows the perspective view of the last assembled boom (10).
  • the bending angles of the upper part (11) which is bent from 5 different bending points (14) are preferred such that they are between 128-158 degrees.
  • the side sections of the upper part (11) are bent with ⁇ angle and ⁇ angle is preferably 131 degrees.
  • the middle bending point (14) of the upper part (11) is bent with ⁇ angle and ⁇ angle is preferably 155 degrees.
  • the bending points (14) formed on both sides of the middle bending point (14) of the upper part (11) are bent with ⁇ angle and ⁇ angle is preferred as 151 degrees. Consequently, 5 different bending points (14) at which the upper part (11) is bent were bend at 3 different angles as ⁇ , ⁇ , ⁇ angles.
  • ⁇ is greater than ⁇ and ⁇ is greater than ⁇ as it can be understood from the above mentioned numerical values.
  • the lower part (12) is bent at 9 different bending points (14). These bending points (14) must be preferred between 156 and 165 degrees.
  • the bending points (14) in the head sections are bent with ⁇ angle. ⁇ angle is preferred as 159 degrees.
  • the other 7 bending points (14) formed in the middle part is bent with ⁇ angle and ⁇ is preferred as 160 degrees.
  • two of 9 bending points (14) where the lower part (12) is bent are bent with ⁇ angle; the remaining seven are bent with ⁇ angle.
  • ⁇ is greater than ⁇ as it can be understood from the given numerical values.
  • the forces applied to the lower and upper parts of the boom (10) are provided to be distributed over the boom (10) surfaces equally by means of bending the upper part (11) and lower part (12) with the above mentioned angles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Claims (5)

  1. Ausleger (10), der mit einer Teleskopstruktur im Teleskopkran (1) verwendet wird, um Lasten zu heben, die sich in großer Entfernung/Tiefe befinden, gekennzeichnet durch Umfassen von;
    • einen oberen Teil (11), der den oberen Abschnitt des Auslegers (10) bildet und durch Biegen von Biegestellen (14) ausgebildet wird, die in gleichen Abständen festgelegt sind und deren Festigkeit erhöht ist;
    • einen unteren Teil (12), der den unteren Teil des Auslegers (10) bildet und durch Biegen von mindestens 9 unterschiedlichen Biegestellen (14) aus gebildet wird, die in gleichen Abständen festgelegt sind, dadurch gekennzeichnet, dass der obere Teil durch Biegen von mindestens 5 unterschiedlichen Biegestellen ausgebildet wird, die in gleichen Abständen festgelegt sind.
  2. Ausleger (10) nach Anspruch 1 oder 2, gekennzeichnet durch Biegen der Mitte der 5 am oberen Teil (11) gebildeten Biegestellen (14) mit einem Biegewinkel γ; Biegen der Biegestellen (14) am Rand mit einem Biegewinkel Ω; Biegen der verbleibenden 2 Biegekanten (14) mit einem Biegewinkel θ.
  3. Ausleger (10) nach Anspruch 1 oder 4, gekennzeichnet durch Biegen unter den 9 Biegestellen (14), die am unteren Teil (11) gebildet sind, und zwar diejenigen am Rand mit einem Biegewinkel α; Biegen von 7 Biegestellen (14) in der Mitte mit einem Biegewinkel β.
  4. Ausleger (10) nach Anspruch 3 oder 5, gekennzeichnet durch;
    • Biegen der am oberen Teil (11) gebildeten Biegestellen (14) derart, dass deren Winkel von größer zu kleiner bzw. γ, θ, Ω sind,
    • Biegen der am unteren Teil (12) gebildeten Biegestellen (14) derart, dass der Biegewinkel β größer als der Biegewinkel γ ist.
  5. Verfahren zum Herstellen des
    Auslegers (10) nach Anspruch 1, gekennzeichnet durch das Umfassen der folgenden Prozessschritte;
    • Bilden des oberen Teils (11) durch Biegen desselben von mindestens 5 unterschiedlichen Biegestellen (14) aus in gleichen Abständen,
    • Bilden des unteren Teils (12) durch Biegen desselben von mindestens 9 unterschiedlichen Biegestellen (14) aus in gleichen Abständen,
    • Anbringen der Schweißfugen (13) vom oberen Teil (11) und unteren Teil (12) aneinander.
EP20208793.8A 2020-09-21 2020-11-20 Hochfeste auslegerstruktur Active EP3971125B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2020/14990A TR202014990A2 (tr) 2020-09-21 2020-09-21 Yüksek mukavemetli̇ bom yapisi

Publications (2)

Publication Number Publication Date
EP3971125A1 EP3971125A1 (de) 2022-03-23
EP3971125B1 true EP3971125B1 (de) 2024-04-24

Family

ID=73543043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20208793.8A Active EP3971125B1 (de) 2020-09-21 2020-11-20 Hochfeste auslegerstruktur

Country Status (2)

Country Link
EP (1) EP3971125B1 (de)
TR (1) TR202014990A2 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005112514A (ja) * 2003-10-06 2005-04-28 Tadano Ltd 伸縮ブーム
JP2010089919A (ja) * 2008-01-09 2010-04-22 Kobelco Cranes Co Ltd 伸縮ブーム
RU190009U1 (ru) * 2019-03-22 2019-06-14 Открытое акционерное общество «Челябинский механический завод» Стрела телескопическая

Also Published As

Publication number Publication date
EP3971125A1 (de) 2022-03-23
TR202014990A2 (tr) 2020-11-23

Similar Documents

Publication Publication Date Title
CA1143700A (en) High-strength light-weight boom section for telescopic crane boom
EP2548834B1 (de) Aus Platten gefertigter, auf Maß geschweißter Ausleger für eine Baumaschine und Verfahren zur dessen Herstellung
US6481259B1 (en) Method for precision bending of a sheet of material and slit sheet therefor
TWI330557B (en) Fatigue-resistance sheet slitting method and resulting sheet
CA1120681A (en) Compound beam
TWI447287B (zh) Constructor
JPS5913437B2 (ja) クレ−ンブ−ム組立体
GB1599729A (en) Telescopic booms
EP2814770B1 (de) Segment eines gelenkarms und gelenkarm mit diesem segment
US4171597A (en) Crane boom and telescopic section for it
EP3971125B1 (de) Hochfeste auslegerstruktur
EP2248755B1 (de) Arm aus Verbundwerkstoff und jeweiligen Herstellungsverfahren
KR20070006613A (ko) 크레인 신축자재부의 상위현
EP3456887B1 (de) Baggerausleger und bagger
CA2697303A1 (en) Profile shape for a crane boom
US20120074089A1 (en) Telescopic section and crane with a telescopic section
AU776097B2 (en) Jib crane
US20230243174A1 (en) Method of manufacturing buckling-restrained building material
JP6245768B2 (ja) バケット
CN113860140A (zh) 一种玻璃纤维筋钢筋结构的吊装装置及方法
US10414637B2 (en) Telescopic section having a variably extending fitting edge
CN220908499U (zh) 挖掘机臂体和挖掘机
CN210528314U (zh) 连接结构及起重机
JP5267480B2 (ja) 撓み低減方法および構造部材
CA2697304A1 (en) Profile shape for a crane boom

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210923

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230418

17Q First examination report despatched

Effective date: 20230524

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240109

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602020029463

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D