EP0325064B1 - Verbesserung der Stabilität von Gabelhubwagen mit einem teleskopischen Arm - Google Patents

Verbesserung der Stabilität von Gabelhubwagen mit einem teleskopischen Arm Download PDF

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Publication number
EP0325064B1
EP0325064B1 EP19880403018 EP88403018A EP0325064B1 EP 0325064 B1 EP0325064 B1 EP 0325064B1 EP 19880403018 EP19880403018 EP 19880403018 EP 88403018 A EP88403018 A EP 88403018A EP 0325064 B1 EP0325064 B1 EP 0325064B1
Authority
EP
European Patent Office
Prior art keywords
telescopic arm
arm
stability
forklift truck
telescopic
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.)
Expired - Lifetime
Application number
EP19880403018
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English (en)
French (fr)
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EP0325064A1 (de
Inventor
Marcel Claude Braud
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.)
Manitou BF SA
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Manitou BF SA
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Filing date
Publication date
Application filed by Manitou BF SA filed Critical Manitou BF SA
Publication of EP0325064A1 publication Critical patent/EP0325064A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/065—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted
    • B66F9/0655—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted with a telescopic boom

Definitions

  • the present invention relates to self-propelled forklifts of the type comprising a single telescopic arm, articulated in the rear half of the chassis (see Figures 1 and 2).
  • This telescopic arm is provided with a hydraulic lifting cylinder which is, in general, placed under the telescopic beam, between the beam and the structure of the machine.
  • the front end of said telescopic arm comprises means for coupling specific tools for handling loads, such as forks, skips, jibs, etc.
  • Trolleys of this type are mostly equipped with an oscillating landing axle, which is used to improve comfort and stability in dynamics, in particular in all terrains.
  • a bracket is provided formed by two fixed pillars articulated around the articulation axis on which the telescopic beam is hung.
  • Said telescopic beam can be positioned around the articulation axis as in French patent n ° 2 287 413 or immediately below (see FIG. 1) in order to facilitate the installation of the foot of a jack, called telescoping, which allows you to exit and return the telescopic element of the beam.
  • the telescopic beam is therefore characterized by the raised position of its rear part and the bottom of its front part. This arrangement has two drawbacks.
  • the first is that the telescopic beam largely crosses the driver's lateral field of vision (see Figure 1) in the natural position of transporting a load, thus dangerously affecting the driver's visibility.
  • the second is that it causes a large displacement, in rotation towards the rear of the center of gravity of the telescopic beam during lifting at great height. This significant displacement of the masses of the telescope towards the rear of the machine is unfavorable to its transverse stability towards the rear. Now, the transverse backward stability obeys a standard and tests aimed at giving these machines an abacus of lifting capacities acceptable for their safety of use.
  • the invention aims to remedy these drawbacks and to provide a new arrangement of the telescopic arm of a forklift which thus improves the lifting performance for a given power.
  • the self-propelled carriage of the telescopic arm type articulated under a bracket formed by two pillars articulated around an articulation axis is characterized in that the telescopic arm is offset downward relative to the articulation axis of a distance (d) substantially equal to 40% of the height of the articulation axis relative to the ground.
  • d a distance substantially equal to 40% of the height of the articulation axis relative to the ground.
  • the elevation axis of the beam meanwhile, will remain at a height substantially as high as that of traditional telehandlers. Only the telescopic arm will be lowered very significantly with respect to its axis of articulation by means of a structure in the form of a butt whose upper end is crossed by the axis of articulation of elevation.
  • the latter will be in the low position below the driver's field of vision, thereby improving its lateral visibility.
  • the telescopic lifting cylinder (s) can be placed on the sides of the telescopic beam, thus freeing up additional space, space which, in a traditional design , is occupied by the lifting cylinder.
  • the invention can be applied to forklifts with traditional architecture in which the telescopic arm passes over the powertrain centered on the chassis. In this case, a significant improvement in stability and visibility is already obtained.
  • the gain in stability and visibility is increased when the invention is applied to forklifts in which all the bulky members (powerplant, transmission, cabin) have been arranged so as to release entirely the median longitudinal axis of the carriage to accommodate the telescopic arm.
  • the cabin 1 is arranged on one side of the carriage between the front 9 and rear wheels 10
  • the motor 2 is arranged between the opposite wheels 9 and 10 of the on the other side of the chassis, the assembly completely freeing a central platform for the arm 6 which can thus be arranged as low as possible.
  • the telescopic arm 6 generally consists of 2 to 3 sections, the end of the internal section carrying an apron 7 for attaching tools such as forks (shown in this example), buckets, concrete buckets, etc. ..
  • the transmission between the engine and the front axle 11 is a hydrostatic transmission.
  • the bracket 4 is disposed substantially at the level of the rear axle 11.
  • the arm 6 is pendulous under the upper end of the bracket 4 which is made up of two pillars 17 supporting a transverse shaft 18.
  • the offset between the articulation axis 18 and with the longitudinal axis of the telescopic arm 3 is represented by the arrow d in FIG. 3. It is obtained by the general structure of the arm 6 in the form of a butt at the rear end of the external telescope.
  • This offset structure d makes it possible to considerably increase the stability of the trolley for identical lifting heights and loads and, as a corollary, it makes it possible to increase the lifting capacities, with identical safety coefficient.
  • This improvement in capacities clearly appears during the comparison of FIGS. 5 and 6 where FIG. 5 represents the load chart of a current carriage and FIG. 6 that of a carriage of the same dimension produced according to the invention.
  • each amount of said bracket carries a point of articulation 19 for a jack 20 whose end of the rod is articulated on a yoke 21 fixed on the top of the outer tube of the arm 6
  • this arrangement ensures a lowering of the center of gravity of the arm, which further enhances the improvement in lifting performance.
  • the center of gravity G2 of the beam according to the invention is constantly lower or more advanced than the center of gravity G1 of a conventional beam, throughout the elevation movement.
  • FIG. 7 shows the gains in stability induced by a telescopic beam according to the invention during a complete lifting movement.
  • a i (initial) represents the difference between G2 and G1 in the low position.
  • a 1, A 2 ... A 6 represent the gains obtained during the elevation and ⁇ f (final) the gain of lifting, at maximum height.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (6)

1. Selbstfahrender Hubwagen von der Art mit einem Teleskopträger (6), der an einem aus zwei fest angeordneten Stützen (17) gebildeten Träger (4), der eine Schwenkachse (18) trägt, angelenkt ist, dadurch gekennzeichnet, daß der Teleskopträger (6) in Bezug auf die Schwenkachse (18) nach unten mit einem Abstand (d) entsprechend im wesentlichen 40% des Abstandes der Schwenkachse (18) vom Boden abgesetzt ist.
2. Hubwagen nach Anspruch 1, dadurch gekennzeichnet, daß der Teleskopträger (6) am hinteren Ende seines äußeren Teleskoprohres in Form eines Krummstabes ausgebildet ist.
3. Hubwagen nach Anspruch 2, dadurch gekennzeichnet, daß der Teleskopträger (6) mit dem Ende des Krummstabes an der Schwenkachse (18) angelenkt ist.
4. Hubwagen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Teleskopträger (6) durch wenigstens eine seitlich am Teleskopträger (6) angeordnete Hebevorrichtung (20) betätigt wird, deren Schaft oberhalb des äußeren Teleskoprohres des Teleskopträgers (6) angelenkt ist.
5. Hubwagen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Träger (4) für den Teleskopträger (6) oberhalb der Hinterachse (12) des Hubwagens angeordnet ist.
6. Hubwagen nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Motor (2) und die Kabine (1) so angeordnet sind, daß die Längsmittelachse des Hubwagens frei liegt, um dort den Teleskopträger (6) anzuordnen.
EP19880403018 1987-12-18 1988-11-30 Verbesserung der Stabilität von Gabelhubwagen mit einem teleskopischen Arm Expired - Lifetime EP0325064B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717728A FR2624842B1 (fr) 1987-12-18 1987-12-18 Amelioration a la stabilite des chariots elevateurs a bras telescopique
FR8717728 1987-12-18

Publications (2)

Publication Number Publication Date
EP0325064A1 EP0325064A1 (de) 1989-07-26
EP0325064B1 true EP0325064B1 (de) 1990-08-08

Family

ID=9358045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880403018 Expired - Lifetime EP0325064B1 (de) 1987-12-18 1988-11-30 Verbesserung der Stabilität von Gabelhubwagen mit einem teleskopischen Arm

Country Status (4)

Country Link
EP (1) EP0325064B1 (de)
DE (1) DE3860446D1 (de)
ES (1) ES2017797B3 (de)
FR (1) FR2624842B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018644A1 (de) * 2004-04-16 2005-11-03 Liebherr-Werk Nenzing Gmbh, Nenzing Telelader, insbesondere Reachstacker
KR20160037765A (ko) * 2014-09-29 2016-04-06 제이씨 뱀포드 엑스카베이터즈 리미티드 요 방향 조정 수단을 가진 붐 조립체

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2009968C (en) * 1990-02-13 1996-06-25 Giovanni Bentivoglio Boom operated fork truck
JPH04131574U (ja) * 1991-05-29 1992-12-03 谷電機工業株式会社 重心保持と重心移動機能付運搬装置
DE9114464U1 (de) * 1991-11-21 1993-03-25 Krupp Industrietechnik GmbH, 4100 Duisburg Kranfahrzeug
DE9302376U1 (de) * 1993-02-18 1993-06-24 EC Engineering + Consulting Spezialmaschinen GmbH, 7900 Ulm Kranfahrzeug
JP3807760B2 (ja) * 1994-07-15 2006-08-09 ジェイ． シー． バンフォード エクスカヴェイターズ リミテッド 特殊車両
FR2728884A1 (fr) * 1995-01-04 1996-07-05 Manitou Bf Chariot de manutention motorise a bras telescopique
FR2724374B1 (fr) * 1994-09-14 1996-10-25 Manitou Bf Chariot de manutention motorise apte a etre embarque a l'arriere d'un vehicule porteur
DE69501578T3 (de) * 1994-09-14 2005-02-03 Manitou Bf Motorhubwagen mit teleskopischem Arm
FR2788759B1 (fr) 1999-01-27 2001-03-23 Sambron Dispositif de controle de deplacement d'une structure portante d'engin roulant et engin roulant incorporant ledit dispositif
DE102004021839A1 (de) 2004-05-04 2005-12-01 Liebherr-Werk Nenzing Gmbh, Nenzing Telelader, insbesondere Reachstacker

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270899A (en) * 1964-04-17 1966-09-06 Baldwin Lima Hamilton Corp Load handling vehicle
FR2091898B1 (de) * 1970-04-09 1978-01-13 Potain Sa
US3836025A (en) * 1973-05-21 1974-09-17 Loed Corp Material-handling machine
US3985248A (en) * 1974-09-25 1976-10-12 Badger Dynamics, Inc. Telescopic boom assembly
DE2545427B2 (de) * 1974-10-12 1979-05-03 Liner Concrete Machinery Co. Ltd., Gateshead, Durham (Grossbritannien) Fahrzeug zum Umsetzen von Lasten
US4147263A (en) * 1977-01-06 1979-04-03 Lull Engineering Company, Inc. High lift loader with extended transfer
IT1102219B (it) * 1978-02-02 1985-10-07 Comensoli Cormach Apparecchiatura di sollevamento a due bracci

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018644A1 (de) * 2004-04-16 2005-11-03 Liebherr-Werk Nenzing Gmbh, Nenzing Telelader, insbesondere Reachstacker
KR20160037765A (ko) * 2014-09-29 2016-04-06 제이씨 뱀포드 엑스카베이터즈 리미티드 요 방향 조정 수단을 가진 붐 조립체

Also Published As

Publication number Publication date
FR2624842B1 (fr) 1990-04-06
ES2017797B3 (es) 1991-03-01
DE3860446D1 (de) 1990-09-13
EP0325064A1 (de) 1989-07-26
FR2624842A1 (fr) 1989-06-23

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