EP0440519A1 - Hubwagen mit teleskopischem Ausleger - Google Patents

Hubwagen mit teleskopischem Ausleger Download PDF

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Publication number
EP0440519A1
EP0440519A1 EP91400124A EP91400124A EP0440519A1 EP 0440519 A1 EP0440519 A1 EP 0440519A1 EP 91400124 A EP91400124 A EP 91400124A EP 91400124 A EP91400124 A EP 91400124A EP 0440519 A1 EP0440519 A1 EP 0440519A1
Authority
EP
European Patent Office
Prior art keywords
arm
point
chassis
auxiliary
auxiliary arm
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
EP91400124A
Other languages
English (en)
French (fr)
Other versions
EP0440519B1 (de
Inventor
Marcel Claude Braud
Michel Dropsy
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 EP0440519A1 publication Critical patent/EP0440519A1/de
Application granted granted Critical
Publication of EP0440519B1 publication Critical patent/EP0440519B1/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 forklifts with telescopic lifting arms.
  • these forklifts comprise a chassis, carrying a front axle and a rear axle, on which the telescopic arm is mounted.
  • This lifting arm is often mounted on a fixed bracket placed at the rear of the chassis, but it has also been proposed, for example by French patent No. 1,182,493, to mount the arm on the chassis by means of a deformable quadrilateral. To this end, connecting means are provided in order to connect two points located at the rear of the arm to two points on the chassis.
  • the main drawback of known forklifts lies in the loss of handling capacity both in horizontal and vertical movement as the telescopic lifting arm is raised.
  • FIG. 1 the diagram of the lifting capacities of a known forklift truck, here a carriage whose arm is articulated on a fixed bracket positioned above the rear axle.
  • the invention aims to provide a device for greatly increased stability even outside the use of stabilizers and which also offers the driver very good visibility.
  • Said quadrilateral is deformable under the action of a lifting cylinder articulated on the one hand to the chassis at a point thereof situated between the points (D) and (C) of articulation of said tie rod and auxiliary arm, and d on the other hand to the lifting arm at a point located at the front of said point (A).
  • each articulation device of a telescopic arm will include two tie rods, two auxiliary arms and two jacks, located on either side of the median longitudinal plane of the carriage.
  • the two auxiliary arms may however be replaced by a tube of section substantially equal to that of the telescopic arm and the rear end of which is connected to two lateral flanges carrying the axis of articulation of the telescopic arm so as to allow relative movement of the telescopic arm and the auxiliary arm.
  • the means according to the invention moreover provide longitudinal and transverse stability of the machine much greater than that of known vehicles by advancing the center of gravity of the vehicle during the lifting of the arm.
  • the rear of the lifting arm is during this raised movement of a height substantially equal to that of the auxiliary arm.
  • a carriage which can effectively lift heavy loads, as shown in the diagram in FIG. 6, and which, thanks to the combined displacement of the articulation point in the direction of the geometric center and towards the high, is of improved stability and requires fewer telescope elements to reach the maximum height.
  • the reduction in the number of telescope elements has the advantage of making it possible to reduce the weight of the machine, which added to the notable increase in its stability during its use, authorizes the implementation of a counterweight on the rear axle much lighter and therefore easier to manufacture and cheaper.
  • the reduction in weight of the machine resulting from the reduction in the number of elements of the telescope and in the weight of the counterweight is further improved by the fact that it allows the implementation of a less efficient propulsion group therefore less heavy.
  • the lifting arm By articulating the lifting arm according to the device of the present invention, it overcomes the implementation of a usually massive bracket which largely obstructed the field of vision towards the rear of the driver.
  • the lifting arm resting on the auxiliary arm in a practically horizontal position in the low position, the visibility of the driver is total in this position which is that in which he usually performs the movements of the machine.
  • Another advantage provided by the arrangement according to the invention lies in the fact that in the low position, it is possible to use the machine as a pusher.
  • FIG. 2 schematically shows the arrangement of the various organs of the forklift on the chassis 1 which carries a front axle 10 and a rear axle 11.
  • the powerplant 12 intended for the propulsion of the machine in its movements and in the supply of the hydraulic power necessary during the lifting operations of the arm, is arranged on one side of the chassis, here the right side, between the front and rear wheels.
  • the cabin 13 On the side of the chassis opposite the one where said motor-propulsion unit 12 is placed, there is the cabin 13 from which such a machine is piloted. It is noted that a large platform is then available along the median longitudinal axis in order to accommodate the lifting arm 2 and the means making it possible to lift and lower it, not shown in FIG. 2.
  • the lifting arm 2 is telescopic and consists of 2 or 3 elements; the end of the internal element carries an attachment apron 21 of tools such as forks (as shown) buckets, concrete skips ...
  • a so-called compensation cylinder 22 maintains the horizontality of the tool throughout the movements of the lifting arm 2. This cylinder 22 empties when the cylinder 27 ensuring the deployment of the telescope is filled.
  • the chassis 1 also carries at its rear end a counterweight 14 intended to increase the longitudinal stability of the machine.
  • Figures 3 and 4 show the joint according to the invention of the lifting arm 2 on the chassis 1 of the machine.
  • said arm 2 is connected to the chassis 1 by means of a deformable quadrilateral ABCD comprising a tie rod 23 and an auxiliary arm 24.
  • the tie rod 23 is articulated on the one hand at a point A located on the arm 2 substantially above the rear axle 11 in the low position of the arm shown in FIG. 3, and on the other hand, at its other end , in D on the chassis 1.
  • the point D is chosen in a horizontal plane extending at a non-negligible distance "x" above the front axle 10, and substantially above said front axle 10.
  • auxiliary arm 24 At a point B located behind point A and for example, as shown, at the rear end of the arm 2 is articulated the auxiliary arm 24, the other end of which is articulated at C on the chassis 1.
  • the point C is, as visible in the figures, situated in a plane parallel to the axles 10, 11 and comprising the geometric center of the chassis 1.
  • the points A and B of articulation of the tie rod 23 and of the auxiliary arm 24 are provided on the top of the arm 2 so that the latter is in the low position of FIG. 3 entirely under these points A, B. In this position low, the lifting arm 2 rests on the auxiliary arm 24 in a practically horizontal position.
  • the tools carried by the attachment apron 21 rest on the ground.
  • the forces applied to said deck are practically horizontal so that one can provide, by hanging a suitable tool, to use the carriage as a pusher, which may prove useful on construction sites.
  • the auxiliary arm 24 is located around the median longitudinal plane of the forklift. Said arm 24 is in one piece and ends in two flanges 24 ′ passing on either side of the rear end of the arm 2 to be articulated on the arm at B by any known means. In the example shown, the auxiliary arm 24 is then provided in the form of a butt and the point C is positioned at the geometric center of the chassis.
  • Two similar tie rods 23 are arranged symmetrically with respect to the median longitudinal plane of the carriage between pairs of points D on the chassis and A on the lifting arm 2.
  • the lifting arm 2 is thus articulated to the chassis 1 by a deformable quadrilateral ABCD of which AB is a portion of itself and CD a part of the chassis 1.
  • said quadrilateral ABCD is deformed by the action of a lifting cylinder 25 which according to the invention is articulated at one of its ends on the chassis 1 at a point E located between C and D and at the other end on the lifting arm 2 at a point F located in front of point A.
  • the lifting cylinder 25 is also a double element formed by two cylinders arranged symmetrically with respect to the median longitudinal plane of the carriage.
  • auxiliary jack 26 disposed under the auxiliary arm 24 and articulated on said auxiliary arm 24 in H and on the frame 1 at a point G located between the joint point C of the auxiliary arm 24 and the rear axle 11.
  • the figures show the size of the cabin 13 in order to show that the arrangement according to the invention allows the operator's field of vision to be largely cleared, laterally and towards the rear.
  • FIG. 4 showing the carriage with the lifting arm 2 raised, it can be seen that the rear end of the latter is then raised relative to the chassis by a height Y substantially equal to the length of the second arm 24.
  • the chassis 1 of the trolley according to the invention can also be made lighter and, in an entirely advantageous manner since it is simple to manufacture, provided in the form of two generally L-shaped elements 15 whose short side is of substantially equal length. at "x" while as visible in the figures the long side is of dimension smaller than the wheelbase of the machine. The rear axle is then articulated to the chassis.
  • FIG. 5 shows the displacement of points A, B, F and H during the movements of arm 2 between its rest position and its raised position at maximum.
  • the curves representing the respective positions of said points A, B, F and H have been noted 31, 32, 33, 34.
  • the carriage is positioned so that one of the sides of the support polygon other than the front axle is parallel to the tilting axis of the platform.
  • the maximum admissible inclination of the platform is (d / H) x 100, where d is the distance from the center of gravity to the side of the support polygon parallel to the axis of tilting of the platform , and H is the height of the center of gravity from the ground.
  • the trolley according to the invention has, when the arm is raised and deployed, its center of gravity at the same height H as the traditional trolley.
  • FIG 2 there is shown the lift polygon of the carriage which, for forklifts such as those to which the invention relates, is in a manner known per se, a triangle whose base is the front axle 10 and the vertex the axis around which the rear axle oscillates.
  • G1 and G2 denote the respective centers of gravity of a carriage according to the invention and of a conventional carriage for the high position of the lifting arm.
  • G1 is much closer to the front of the carriage than G2.
  • the distance d1 is then greater than d2, which indicates greater transverse stability of the trolley according to the invention compared to the conventional trolley.
  • the trolley according to the invention can be of reduced size and the beams of the lifting arm will also be shorter.
  • the tie rod 23 can be provided with a different shape in order to release the operator's view even more completely.
  • the tie 23 ′ is of arcuate shape. Therefore, the central part thereof which extends along the cabin 13 when the arm is in the low position is arranged in the space of said arm and does not constitute additional discomfort for the operator.

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)
  • Jib Cranes (AREA)
  • Vehicle Body Suspensions (AREA)
EP91400124A 1990-01-24 1991-01-21 Hubwagen mit teleskopischem Ausleger Expired - Lifetime EP0440519B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9000083 1990-01-24
BE9000083A BE1003344A4 (fr) 1990-01-24 1990-01-24 Chariot elevateur a bras telescopique.

Publications (2)

Publication Number Publication Date
EP0440519A1 true EP0440519A1 (de) 1991-08-07
EP0440519B1 EP0440519B1 (de) 1993-10-27

Family

ID=3884647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400124A Expired - Lifetime EP0440519B1 (de) 1990-01-24 1991-01-21 Hubwagen mit teleskopischem Ausleger

Country Status (4)

Country Link
US (1) US5106257A (de)
EP (1) EP0440519B1 (de)
BE (1) BE1003344A4 (de)
DE (1) DE69100541D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479642A2 (de) * 2003-05-20 2004-11-24 J.C. Bamford Excavators Limited Lasthandhabungsmaschine

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5494302A (en) * 1991-06-11 1996-02-27 Cannondale Corporation Suspension assembly for a vehicle
US6474933B1 (en) * 1995-06-07 2002-11-05 Clark Equipment Company Extended reach vertical lift boom
US6132163A (en) * 1997-10-17 2000-10-17 Deere & Company Boom arm linkage mechanism
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
US6854951B2 (en) * 2000-09-26 2005-02-15 Komatsu Ltd. Vertical lift type arm device
GB2369810B (en) 2000-12-09 2004-07-14 Caterpillar Inc Work machine arrangement
US20030082037A1 (en) * 2001-10-27 2003-05-01 Khodkov Sergey Vladimirovich Combination roll-off bed and grapple arm for mounting to a chassis of a truck
US7383906B2 (en) * 2002-08-29 2008-06-10 Jlg Industries, Inc. Rotatable and telescopic work machine
WO2004083099A1 (ja) * 2003-03-18 2004-09-30 Hitachi Construction Machinery Co., Ltd. 自走式作業機械
US9327632B1 (en) 2009-01-30 2016-05-03 Excel Industries, Inc. Translating cargo bed
IT1396035B1 (it) * 2009-10-19 2012-11-09 Boat Eagle S R L Veicolo sollevatore, in particolare per il rimessaggio di imbarcazioni
GB2547669B (en) * 2016-02-24 2022-04-13 Mcquaid Eng Ltd A boom system for breaking and manoeuvring oversize material
WO2018112211A2 (en) 2016-12-16 2018-06-21 Clark Equipment Company Loader with telescopic lift arm
USD832552S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Lift arm for loader
USD832551S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Loader
CN114103773A (zh) * 2021-09-06 2022-03-01 霍林郭勒市犇腾机械制作有限公司 现代农牧业多功能自卸车

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1182493A (fr) * 1957-02-11 1959-06-25 Yale & Towne Mfg Co Mécanisme de levage pour chariot industriel
FR1308396A (fr) * 1960-12-28 1962-11-03 Grue pivotante pouvant être montée sur un chariot et ayant une flèche déployableet réglable en longueur et une colonne de support avec un cylindre et piston hydraulique
FR1527413A (fr) * 1967-06-14 1968-05-31 Eaton Yale & Towne Chariot-élévateur universel
FR2085928A1 (de) * 1970-04-08 1971-12-31 Tranchero Jacques
FR2287413A1 (fr) * 1974-10-12 1976-05-07 Liner Concrete Machinery Perfectionnements a des vehicules de manutention de charges
US4280589A (en) * 1980-01-31 1981-07-28 Merrick John A Elevating device
EP0308595A1 (de) * 1987-09-25 1989-03-29 Kidde Industries, Inc. In niedriger Bauweise ausgeführte Plattform mit Selbstantrieb für überirdische Arbeiten

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980271A (en) * 1957-02-11 1961-04-18 Yale & Towne Mfg Co Lifting mechanism for industrial truck
US3001654A (en) * 1957-08-30 1961-09-26 Pettibone Mulliken Corp Reaching and self-leveling loader
US3910440A (en) * 1973-07-11 1975-10-07 Clark Equipment Co Vertical lift, extendible reach mechanism for a truck
US4147263A (en) * 1977-01-06 1979-04-03 Lull Engineering Company, Inc. High lift loader with extended transfer
US4318664A (en) * 1980-05-20 1982-03-09 Pierre Gibert Self-stabilizing load lifting and handling vehicle
DD243266A1 (de) * 1985-12-13 1987-02-25 Verlade Und Transportan Lagen Hubvorrichtung mit verlaengerbarer reichweite

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1182493A (fr) * 1957-02-11 1959-06-25 Yale & Towne Mfg Co Mécanisme de levage pour chariot industriel
FR1308396A (fr) * 1960-12-28 1962-11-03 Grue pivotante pouvant être montée sur un chariot et ayant une flèche déployableet réglable en longueur et une colonne de support avec un cylindre et piston hydraulique
FR1527413A (fr) * 1967-06-14 1968-05-31 Eaton Yale & Towne Chariot-élévateur universel
FR2085928A1 (de) * 1970-04-08 1971-12-31 Tranchero Jacques
FR2287413A1 (fr) * 1974-10-12 1976-05-07 Liner Concrete Machinery Perfectionnements a des vehicules de manutention de charges
US4280589A (en) * 1980-01-31 1981-07-28 Merrick John A Elevating device
EP0308595A1 (de) * 1987-09-25 1989-03-29 Kidde Industries, Inc. In niedriger Bauweise ausgeführte Plattform mit Selbstantrieb für überirdische Arbeiten

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479642A2 (de) * 2003-05-20 2004-11-24 J.C. Bamford Excavators Limited Lasthandhabungsmaschine
EP1479642A3 (de) * 2003-05-20 2005-07-06 J.C. Bamford Excavators Limited Lasthandhabungsmaschine

Also Published As

Publication number Publication date
DE69100541D1 (de) 1993-12-02
US5106257A (en) 1992-04-21
EP0440519B1 (de) 1993-10-27
BE1003344A4 (fr) 1992-03-03

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