EP0650921B1 - Industrielles oder halb-industrielles Hubfahrzeug mit kurzem Achsstand - Google Patents

Industrielles oder halb-industrielles Hubfahrzeug mit kurzem Achsstand Download PDF

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Publication number
EP0650921B1
EP0650921B1 EP19940402367 EP94402367A EP0650921B1 EP 0650921 B1 EP0650921 B1 EP 0650921B1 EP 19940402367 EP19940402367 EP 19940402367 EP 94402367 A EP94402367 A EP 94402367A EP 0650921 B1 EP0650921 B1 EP 0650921B1
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EP
European Patent Office
Prior art keywords
industrial
truck according
driver
wheels
chassis
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
EP19940402367
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English (en)
French (fr)
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EP0650921A1 (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
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Application filed by Manitou BF SA filed Critical Manitou BF SA
Publication of EP0650921A1 publication Critical patent/EP0650921A1/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
    • B66F9/075—Constructional features or details
    • B66F9/0759—Details of operating station, e.g. seats, levers, operator platforms, cabin suspension
    • 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
    • B66F9/075—Constructional features or details
    • B66F9/07572—Propulsion arrangements

Definitions

  • the invention relates to forklifts of the front mast and short wheelbase type, in contrast to said load-shifting trucks, the arm of which is articulated substantially at the axis of the rear wheels of the truck.
  • the invention relates more particularly to mast trucks of the industrial or semi-industrial type.
  • Industrial mast trolleys are mainly intended for handling inside buildings or on serviced ground: for this reason, the wheelbase of these trolleys is chosen as short as possible in order to facilitate maneuvers and turns. interior of buildings. These trolleys generally have four small diameter wheels and a ground clearance of approximately 150 mm. They have no obstacle clearance capacity even from a low height.
  • Mast trolleys of the semi-industrial type have the same destination as industrial trolleys and have the same general characteristics but are fitted with large diameter front wheels to allow them to overcome obstacles of low height such as curbs, sidewalks, gullies. or bloodletting that is commonly encountered even in a serviced environment.
  • a short wheelbase is also a desired feature of semi-industrial mast trucks.
  • the truck comprises a chassis, front drive wheels, rear wheels which can be driven and which can be driven, a heat engine arranged in the median longitudinal axis of the truck and substantially in the center of the chassis, a cockpit arranged between the rear wheels and front over the entire width of the carriage and in which the driver's seat is placed in the longitudinal central axis of the carriage so as to allow access to either side of the carriage.
  • the drive of the front drive wheels is obtained either by a drive axle secured to the heat engine via a gearbox, or by the use of hydraulic wheel motors connected by hoses to a hydrostatic pump driven by the thermal motor.
  • the heat engine also drives a second hydraulic pump for operating the lift mast.
  • the cockpit is generally equipped with a crankset which mainly controls the advancement of the truck (brake and slow approach pedal and accelerator pedal) and hydraulic distributor control levers for maneuvering the mast.
  • the mast is pivotally mounted at the front of the chassis with the possibility of tilting forwards and backwards over an angle sector between 6 ° and 15 °.
  • the chassis is equipped at the rear with a counterweight which forms a bodywork element.
  • the present invention aims to remedy this drawback and to provide an industrial or semi-industrial masted carriage which, while retaining a short wheelbase, has a lowered floor allowing access without steps to the cockpit and this without affecting the ground clearance necessary for crossing obstacles and without affecting the visibility of the forks from the driver's seat.
  • an industrial or semi-industrial short-mast mast-type forklift comprising a chassis, front drive wheels, rear steered wheels, a heat engine, a cockpit disposed between the front and rear wheels over the entire width of the truck and in which the driver's seat is arranged so as to allow access from either side of the driving position, the front drive wheels being hydraulic wheel motors connected by hoses to a hydrostatic pump driven by the heat engine, characterized in that the chassis has an open upward conformation between the front drive wheels, so as to define a volume inside which is arranged at least partially the control pedal and in that the hydraulic motors of the front wheels are fixed to said conformation on either side of said volume.
  • the cockpit floor can then be located at a height of less than 550 mm above the ground, which allows access without steps.
  • the driver's ascent and descent maneuvers are easier, less dangerous and less tiring.
  • the invention makes it possible to achieve this result without affecting the ground clearance of the carriage since no member projects below the bottom of the chassis. This is particularly critical for industrial or semi-industrial trucks with extremely low ground clearance (around 150 mm for industrial trucks, and from 250 to 300 mm for semi-industrial trucks).
  • the lowering of the driving position provides for cabin trucks a lowering of the roof of the cabin which is particularly sought after in an industrial environment where trolleys of this type frequently have to pass through relatively low openings.
  • the lift truck represented in FIG. 1 is a semi-industrial lift truck comprising a lifting mast 1 articulated at the front of the truck, front drive wheels 2, rear steering wheels 3, a heat engine 4, a hydrostatic pump 5 driven by the heat engine 4, said pump supplying the hydraulic motors 6 of the front wheels 2.
  • the heat engine 4 is placed in a central position under the seat 7 of the driver's cabin 8.
  • the rear of the carriage is constituted by a counterweight 9 which is generally a foundry piece attached to the chassis.
  • the chassis includes a step M for access to the cabin.
  • the dashboard and the steering wheel are lowered to provide improved visibility of the forks on the ground or at loading height; the rear counterweights 9 have a conformation providing the same visibility as that of the carriage of the prior art; the driving cabin 8 is preferably suspended on elastic shock-absorbing supports providing greater insulation for the driver; the short wheelbase is retained and the heat engine 4 is located further aft of the cabin 8 and not under the seat 7 (this arrangement minimizes the propagation of vibrations, allows the driving station to be lowered and the access step M of the prior art).
  • the carriage comprises a chassis 12 consisting of sheet metal plates shaped to have a section of C section open upwards (FIG. 5). At the front of this chassis are fixed by welding two vertical flanges 13 carrying the hydraulic motors 6 of the front wheels 2, as well as the lower articulation points 14 of the mast 1.
  • crankset 10 is according to the invention advanced and lowered substantially at and in the immediate vicinity of the axis A.
  • the heat engine 4 is arranged longitudinally, that is to say with its drive shaft directed towards the front, in the retracted position in the chassis practically between the rear steered wheels 3.
  • the hydrostatic pump 5 is connected to this motor, connected by hoses 11 to the hydraulic motors of the front drive wheels 2.
  • the driving position is constituted by a cabin 8 mounted tilting towards the front to allow access to the engine 4 and to the hydrostatic pump 5.
  • the driving seat 7 rests on a box 16 forming a partition wall with the engine compartment and the upper plane of which is situated substantially below the top of the engine.
  • the space between the front of the box 16 and the front of the cabin 8 constitutes a floor 15 which, owing to the lowering of the position of the seat, rests practically on the upper part of the chassis 12 at a height H above of the ground less than 550 mm and preferably equal to about 500 mm.
  • this arrangement makes it possible to eliminate the access step to the driving position necessarily present on known industrial or semi-industrial carriages in which the engine is in the central position and the seat above the engine.
  • the lowering of the floor and of the driving position in the trolley according to the invention does not harm visibility towards the front (line B), the driver having in a seated position seen on at least the front third of the forks 17 carried by the mast 1, when these are placed on the ground.
  • the lowering of the floor and the driving position allows the use of a cabin shape adapted to the reduction of the noise level of the trolley according to the invention.
  • the noise level perceived inside the driving position is notably reduced by installing curved front and rear windows, by tilting the sides of the cabin and by providing a padding for the driving cabin 8 mounted on elastic shock-absorbing supports.
  • the noise level transmitted to the environment is advantageously reduced, in the case where the chassis 12 is completely closed on the sides and below to increase the sound insulation with respect to the outside of the driving cabin 8.
  • the bottom bracket 10 is contained in a removable casing in which are also arranged the connection hoses 18, 19 intended for the safety and approach speed commands of the carriage. It is known in fact that, in addition to their function of controlling the brakes and the accelerator of the trolley, the pedals of a forklift are slaved to hydraulic pressure regulators.
  • the pressure regulator 20 associated with the accelerator pedal 21 ensures that, even if the driver has failed to return his reversing command to neutral, the truck cannot be driven to move forwards or backwards when the engine speed is accelerated for maneuvering the mast by the action of the control levers of the hydraulic distributor.
  • the regulator 22 associated with the brake pedal 23 performs the slow approach function. This allows the driver to raise his load at a fast speed (thus giving the engine a high speed) while advancing at a slow speed towards the point where he must deposit this load.
  • the arrangement in a removable casing of the crankset and of the hydraulic connections which are associated with it provides an important advantage during the factory assembly of the industrial trolleys according to the invention. They allow the complete assembly of the hydraulic installation without waiting for the cabin to be mounted on the chassis itself and therefore with great accessibility. The housing is then left waiting in the chassis.
  • the floor 15 of the cabin has a cutout provided with lugs on which the housing is bolted after assembly of the cabin.
  • the lifting, lowering and tilting commands are concentrated on a single lever (not shown) positioned directly to the right of the seat at a location ensuring an ergonomic arm position, so as to eliminate any fatigue in maneuvering.
  • the invention is not limited to the example of semi-industrial trolley described above. It also applies to industrial or semi-industrial trucks whose cockpit does not have a cabin and / or whose rear wheels are not only steer but also drive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Body Structure For Vehicles (AREA)

Claims (9)

  1. Industrielles oder halbindustrielles Hubfahrzeug mit Hubmast und kurzem Achsstand, umfassend ein Fahrgestell (12), angetriebene Vorderräder (2), gelenkte Hinterräder (3), einen Verbrennungsmotor (4), einen zwischen den Vorderrädern und den Hinterrädern angeordneten, sich über die gesamte Breite des Hubfahrzeuges erstreckenden Führerstand, in dem der Fahrersitz (7) so angeordnet ist, daß er von beiden Seiten des Führerstandes zugänglich ist, wobei die angetriebenen Vorderräder durch mittels Schläuche mit einer hydrostatischen Pumpe (5), die vom Verbrennungsmotor angetrieben wird, verbundene hydraulische Radmotoren angetrieben sind, dadurch gekennzeichnet, daß das Fahrgestell (12) zwischen den angetriebenen Vorderrädern (2) nach oben offen ausgebildet ist, wodurch sich ein Raum ergibt, in dessen Inneren die Bedienungspedale (10) wenigstens teilweise angeordnet sind und daß die Hydraulikmotoren für die Vorderräder an dieser Ausbildung beiderseits des besagten Raumes befestigt sind.
  2. Hubfahrzeug mit kurzem Abstand nach Anspruch 1, dadurch gekennzeichnet, daß der Verbrennungsmotor (4) hinter dem Fahrersitz (7) angeordnet ist.
  3. Hubfahrzeug mit kurzem Abstand nach Anspruch 1, dadurch gekennzeichnet, daß die obere Ebene des Kastens (16), auf dem der Fahrersitz (7) ruht, im wesentlichen unterhalb des oberen Bereichs des Verbrennungsmotors (4) verläuft.
  4. Hubfahrzeug nach Anspruch 1, dadurch gekennzeichnet, daß der Verbrennungsmotor (4) in Längsrichtung angeordnet ist und sich der Fahrersitz (7) oberhalb der hydrostatischen Pumpe (5) befindet.
  5. Hubfahrzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Fahrgestell (12) einen C-förmigen Querschnitt, der nach oben offen ist, aufweist.
  6. Hubfahrzeug nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Boden des Führerstandes auf dem oberen Bereich des Fahrgestells (12) ruht.
  7. Hubfahrzeug nach irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sich der Boden (15) auf einer Höhe von weniger als 550 mm oberhalb des Erdbodens befindet.
  8. Hubfahrzeug nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Führerstand aus einer nach vorne kippbaren Kabine (8) besteht.
  9. Hubfahrzeug nach irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Bedienungspedale (10) in einem abnehmbaren Gehäuse, das die Anschlüsse für hydraulische Sicherheitsvorrichtungen (18, 19, 20, 21, 22, 23) enthält, angeordnet sind, wobei besagtes Gehäuse in einer Öffnung des Bodens (15) befestigt ist.
EP19940402367 1993-10-27 1994-10-21 Industrielles oder halb-industrielles Hubfahrzeug mit kurzem Achsstand Expired - Lifetime EP0650921B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312803 1993-10-27
FR9312803A FR2711636B1 (fr) 1993-10-27 1993-10-27 Perfectionnement aux chariot élévateurs industriels et semi-industriels.

Publications (2)

Publication Number Publication Date
EP0650921A1 EP0650921A1 (de) 1995-05-03
EP0650921B1 true EP0650921B1 (de) 1997-09-03

Family

ID=9452258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940402367 Expired - Lifetime EP0650921B1 (de) 1993-10-27 1994-10-21 Industrielles oder halb-industrielles Hubfahrzeug mit kurzem Achsstand

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EP (1) EP0650921B1 (de)
DE (1) DE69405343T2 (de)
FR (1) FR2711636B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908201B4 (de) * 1999-02-25 2016-03-03 Linde Material Handling Gmbh Gabelstapler und Verfahren zur Montage eines Gabelstaplers
FR2791049B1 (fr) 1999-03-19 2001-06-01 Sambron Porte equipement pour engin de levage, mat d'un engin de levage comprenant un tel porte equipement et engin de levage tel que chariot a fourches pourvu dudit mat
EP1945555B1 (de) 2005-11-10 2013-01-02 Crown Equipment Corporation Materialhandhabungsfahrzeug mit verbesserter sicht
DE202009014866U1 (de) * 2009-12-16 2011-04-28 Hubtex Maschinenbau Gmbh & Co. Kg Fahrzeug zum Transport von plattenförmigem Gut
EP3517483B1 (de) * 2018-01-24 2025-12-17 Jungheinrich Aktiengesellschaft Schubmaststapler mit einem gegengewicht
FR3103481B1 (fr) 2019-11-27 2021-10-29 Manitou Bf Engin de manutention de charge

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1475083A (fr) * 1966-03-11 1967-03-31 Hough Co Frank Véhicule élévateur
DE1920157A1 (de) * 1968-04-18 1969-12-11 Lancer Boss Ltd Gabelstapler
US3783962A (en) * 1972-10-10 1974-01-08 Towmotor Corp Mechanical linkage for auxiliary drive control in vehicles
US3889782A (en) * 1973-06-11 1975-06-17 Koehring Co Material handling vehicle having high ground clearance power transmission and wheel support means
DE2516486A1 (de) * 1975-04-15 1976-10-28 Irion & Vosseler Gabelstapler
DE8333182U1 (de) * 1983-11-18 1985-05-23 Linde Ag, 6200 Wiesbaden Rahmen für einen Hublader
FR2568236B1 (fr) * 1984-07-30 1987-11-13 Noirot Yves Chargeur-elevateur
CA1265477A (en) * 1985-09-25 1990-02-06 Kenkichi Nozaka Load handling vehicle
DE3914839A1 (de) * 1989-05-05 1990-11-08 Cardo Gabelstapler Gmbh & Co K Transportfahrzeug, insbesondere gabelstapler

Also Published As

Publication number Publication date
EP0650921A1 (de) 1995-05-03
DE69405343T2 (de) 1998-04-02
DE69405343D1 (de) 1997-10-09
FR2711636A1 (fr) 1995-05-05
FR2711636B1 (fr) 1995-12-01

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