EP0325064A1 - 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
EP0325064A1
EP0325064A1 EP88403018A EP88403018A EP0325064A1 EP 0325064 A1 EP0325064 A1 EP 0325064A1 EP 88403018 A EP88403018 A EP 88403018A EP 88403018 A EP88403018 A EP 88403018A EP 0325064 A1 EP0325064 A1 EP 0325064A1
Authority
EP
European Patent Office
Prior art keywords
telescopic arm
arm
forklift
telescopic
stability
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.)
Granted
Application number
EP88403018A
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English (en)
French (fr)
Other versions
EP0325064B1 (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
Original Assignee
Manitou BF SA
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 Manitou BF SA filed Critical Manitou BF SA
Publication of EP0325064A1 publication Critical patent/EP0325064A1/de
Application granted granted Critical
Publication of EP0325064B1 publication Critical patent/EP0325064B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 frame (see Figures 1 and 2).
  • This telescopic arm is provided with a hydraulic lift 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 hitching specific tools for handling loads, such as forks, buckets, stems, etc.
  • Trucks of this type are for the most part equipped with an oscillating rear axle, which serves to improve comfort and stability in dynamics, especially in all terrains.
  • the present trolleys are characterized in that, in order to improve the lifting heights while maintaining a reasonable overall length, the lifting hinge pin of the telescopic beam is in an elevated position relative to the rest of the machine, sometimes even above the level of the driver's head.
  • the telescopic beam meanwhile, is positioned immediately above or below this axis, and this to allow the implantation of the foot of the cylinder, said telescoping, which allows exit and retract the telescopic element of the beam.
  • the telescopic beam is therefore characterized by the raised position of its rear and lower part of its front part. This arrangement has two disadvantages.
  • the first is that the telescopic beam extensively crosses the lateral field of view of the driver (see Figure 1) in the natural position of transport of a load, thus dangerously affecting the visibility of the driver.
  • the second is that it causes a large displacement, rotating backwards of the center of gravity of the telescopic beam during lifts high.
  • This significant displacement of the masses of the telescope towards the rear of the machine is unfavorable to its transverse stability towards the rear.
  • the transverse stability towards the rear obeys a standard and tests aiming at conferring on these machines an abacus of lifting capacities acceptable for their safety of use.
  • the telescopic arm carriage which comprises in a known manner a frame, a heat engine and a transmission, a cockpit and a lifting arm hinged to the rear of the frame, is characterized in that the arm is offset downwardly relative to the hinge pin lift.
  • the arm is offset downwardly relative to the hinge pin lift.
  • the telescope lifting jack (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 lift cylinder.
  • the hinge axis of elevation of the beam meanwhile, will remain at a height substantially as high as that of traditional telescopic carriages. Only the telescopic arm will be lowered significantly relative to its axis of articulation by means of a butt-shaped structure whose upper end is traversed by the axis of articulation of elevation.
  • the invention is therefore characterized by a significant offset of the telescopic beam relative to its axis of articulation. This offset can reach or even exceed 40% of the height of the axis of articulation relative to the ground.
  • the invention can be applied to traditionally-built lift trucks in which the telescopic arm passes over the power train centered on the chassis. In this case we already obtain a significant improvement in stability as well as visibility.
  • the gain in stability and visibility is increased when the invention is applied to lift trucks in which all the bulky members (powertrain, transmission, cab) have been arranged in such a way as to disengage completely.
  • the median longitudinal axis of the carriage to accommodate the telescopic arm.
  • the cab 1 is disposed on one side of the carriage between the front wheels 9 and rear 10
  • the motor 2 is disposed between the opposite wheels 9 and 10 of the other side of the frame, the assembly completely releasing a central platform for the arm 6 which can be arranged as low as possible.
  • the telescopic arm 6 is generally constituted of 2 to 3 sections, the end of the inner section carrying an attachment apron 7 of 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 stem 4 is disposed substantially at the level of the rear axle 11.
  • the arm 6 is pendulum under the upper end of the bracket 4 which consists of two pillars 17 articulated around a transverse shaft 18.
  • the offset between the axis of articulation 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 shape of a stick at the rear end. of the external telescope.
  • each upright of said bracket carries a hinge point 19 for a cylinder 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 of lifting performance.
  • FIG. 7 is a schematic diagram showing the trajectories of the centers of gravity of the two types of telescopic beams: . a traditional beam (reference 22) . a beam according to the invention (reference 23)
  • 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 during the entire lifting movement.
  • FIG. 7 shows the stability gains induced by a telescopic beam according to the invention during a movement complete lifting.
  • ⁇ i (initial) represents the difference between G2 and G1 in the low position.
  • ⁇ 1, ⁇ 2 ... ⁇ 6 represent the gains obtained during the elevation and ⁇ f (final) the lift gain finally, 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)
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
FR8717728 1987-12-18
FR8717728A FR2624842B1 (fr) 1987-12-18 1987-12-18 Amelioration a la stabilite des chariots elevateurs a bras telescopique

Publications (2)

Publication Number Publication Date
EP0325064A1 true EP0325064A1 (de) 1989-07-26
EP0325064B1 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 (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543276A1 (de) * 1991-11-21 1993-05-26 Krupp Industrietechnik Gmbh Fahrzeugkran
AU647625B2 (en) * 1991-05-29 1994-03-24 Tani Electronics Industry Co., Ltd. Transporter with function of maintaining and moving centre of gravity
EP0611725A1 (de) * 1993-02-18 1994-08-24 EC Engineering + Consulting Spezialmaschinen GmbH Kranfahrzeug
EP0692448A1 (de) * 1994-07-15 1996-01-17 J.C. Bamford Excavators Limited Handhabungsfahrzeug für Material
FR2724374A1 (fr) * 1994-09-14 1996-03-15 Manitou Bf Chariot de manutention motorise apte a etre embarque a l'arriere d'un vehicule porteur
EP0701963A1 (de) * 1994-09-14 1996-03-20 Manitou Bf Motorhubwagen mit teleskopischem Arm
FR2728884A1 (fr) * 1995-01-04 1996-07-05 Manitou Bf Chariot de manutention motorise a bras telescopique
EP1024108A1 (de) 1999-01-27 2000-08-02 Sambron Vorrichtung zur Umstellungskontrolle einer Tragstruktur eines Wagens
EP1593643A2 (de) 2004-05-04 2005-11-09 Liebherr-Werk Nenzing GmbH Telelader, insbesondere Reachstacker
US20160090282A1 (en) * 2014-09-29 2016-03-31 J. C. Bamford Excavators Limited Boom assembly with yaw adjustment

Families Citing this family (2)

* 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
DE102004018644A1 (de) * 2004-04-16 2005-11-03 Liebherr-Werk Nenzing Gmbh, Nenzing Telelader, insbesondere Reachstacker

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1435214A (fr) * 1964-04-17 1966-04-15 Baldwin Lima Hamilton Corp Véhicule de manutention auto-chargeur
FR2091898A1 (de) * 1970-04-09 1971-01-21 Potain Sa
FR2287413A1 (fr) * 1974-10-12 1976-05-07 Liner Concrete Machinery Perfectionnements a des vehicules de manutention de charges
US3985248A (en) * 1974-09-25 1976-10-12 Badger Dynamics, Inc. Telescopic boom assembly
US4147263A (en) * 1977-01-06 1979-04-03 Lull Engineering Company, Inc. High lift loader with extended transfer
USRE30021E (en) * 1973-05-21 1979-06-05 Loed Corporation Material handling machine
GB2013616A (en) * 1978-02-02 1979-08-15 Comensoli Cormach Double slewing crane

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1435214A (fr) * 1964-04-17 1966-04-15 Baldwin Lima Hamilton Corp Véhicule de manutention auto-chargeur
FR2091898A1 (de) * 1970-04-09 1971-01-21 Potain Sa
USRE30021E (en) * 1973-05-21 1979-06-05 Loed Corporation Material handling machine
US3985248A (en) * 1974-09-25 1976-10-12 Badger Dynamics, Inc. Telescopic boom assembly
FR2287413A1 (fr) * 1974-10-12 1976-05-07 Liner Concrete Machinery Perfectionnements a des vehicules de manutention de charges
US4147263A (en) * 1977-01-06 1979-04-03 Lull Engineering Company, Inc. High lift loader with extended transfer
GB2013616A (en) * 1978-02-02 1979-08-15 Comensoli Cormach Double slewing crane

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU647625B2 (en) * 1991-05-29 1994-03-24 Tani Electronics Industry Co., Ltd. Transporter with function of maintaining and moving centre of gravity
EP0543276A1 (de) * 1991-11-21 1993-05-26 Krupp Industrietechnik Gmbh Fahrzeugkran
EP0611725A1 (de) * 1993-02-18 1994-08-24 EC Engineering + Consulting Spezialmaschinen GmbH Kranfahrzeug
US5405028A (en) * 1993-02-18 1995-04-11 Ec Engineering+Consulting Spezialmaschinen Gmbh Crane vehicle
EP0692448A1 (de) * 1994-07-15 1996-01-17 J.C. Bamford Excavators Limited Handhabungsfahrzeug für Material
US5836733A (en) * 1994-07-15 1998-11-17 J.C. Bamford Excavators Limited Material-handling vehicle
US5813821A (en) * 1994-09-14 1998-09-29 Manitou Bf Motorized lift truck adapted to be loaded on the rear of a carrying vehicle
EP0701963A1 (de) * 1994-09-14 1996-03-20 Manitou Bf Motorhubwagen mit teleskopischem Arm
FR2724374A1 (fr) * 1994-09-14 1996-03-15 Manitou Bf Chariot de manutention motorise apte a etre embarque a l'arriere d'un vehicule porteur
FR2728884A1 (fr) * 1995-01-04 1996-07-05 Manitou Bf Chariot de manutention motorise a bras telescopique
EP1024108A1 (de) 1999-01-27 2000-08-02 Sambron Vorrichtung zur Umstellungskontrolle einer Tragstruktur eines Wagens
EP1593643A2 (de) 2004-05-04 2005-11-09 Liebherr-Werk Nenzing GmbH Telelader, insbesondere Reachstacker
EP1593643A3 (de) * 2004-05-04 2011-05-04 Liebherr-Werk Nenzing GmbH Telelader, insbesondere Reachstacker
US20160090282A1 (en) * 2014-09-29 2016-03-31 J. C. Bamford Excavators Limited Boom assembly with yaw adjustment
KR20160037765A (ko) * 2014-09-29 2016-04-06 제이씨 뱀포드 엑스카베이터즈 리미티드 요 방향 조정 수단을 가진 붐 조립체
CN105460808A (zh) * 2014-09-29 2016-04-06 J.C.班福德挖掘机有限公司 具有偏转调节的吊臂组件
US10106384B2 (en) * 2014-09-29 2018-10-23 J. C. Bamford Excavators Limited Boom assembly with yaw adjustment
KR102139264B1 (ko) * 2014-09-29 2020-07-29 제이씨 뱀포드 엑스카베이터즈 리미티드 요 방향 조정 수단을 가진 붐 조립체

Also Published As

Publication number Publication date
ES2017797B3 (es) 1991-03-01
DE3860446D1 (de) 1990-09-13
FR2624842A1 (fr) 1989-06-23
EP0325064B1 (de) 1990-08-08
FR2624842B1 (fr) 1990-04-06

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