EP1424306A1 - 3-Rad-Gabelstapler mit einem Gegengewicht - Google Patents
3-Rad-Gabelstapler mit einem Gegengewicht Download PDFInfo
- Publication number
- EP1424306A1 EP1424306A1 EP03025314A EP03025314A EP1424306A1 EP 1424306 A1 EP1424306 A1 EP 1424306A1 EP 03025314 A EP03025314 A EP 03025314A EP 03025314 A EP03025314 A EP 03025314A EP 1424306 A1 EP1424306 A1 EP 1424306A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- forklift
- axis
- counterweight
- forklift according
- friction
- 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
Links
- 238000005096 rolling process Methods 0.000 claims description 8
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- B66F9/07554—Counterweights
-
- 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
- B66F9/07559—Stabilizing means
Definitions
- the invention relates to a forklift with two front wheels and one in the area of a counterweight essentially centrally arranged rear wheel unit, whereby on a support element is arranged on at least one side of the counterweight, that if the forklift is inclined sideways with the road in Contact occurs.
- Forklifts designed in this way are also known as 3-wheel forklifts.
- There is a mast right in front of the forklift a load suspension device movable thereon in the vertical direction.
- On the back one There is a counterweight at the end of the forklift steerable rear wheel unit of the forklift is arranged.
- the rear wheel unit can have a single wheel or a double wheel, a double wheel consisting of two with there is a small distance on a common axis arranged individual wheels.
- Forklift trucks with three-wheel trolleys are more likely to tip sideways than corresponding forklift truck with four wheels. This depends on the location of the Tipping edges, i.e. the axes of rotation around which the industrial truck tilts one Rotates together. The tipping edges run through the Contact points of two wheels. In a truck with three wheels three tipping edges that together form a triangle, the so-called standing triangle.
- the support runners according to the prior art do their job insufficiently, because the truck does not tip over effectively and safely. This is particularly due to the fact that a high frictional force arises when a support skid touches the ground. When driving through tight curves what is particularly critical with regard to the lateral tipping, this frictional force is im Mainly directed transversely to the vehicle's longitudinal axis. The tipping edge for the side Tilting runs roughly parallel to after the support skid has been put on Vehicle longitudinal axis. So the frictional force is essentially on the support skid perpendicular to the respective tipping edge.
- the invention is therefore based on the object of a 3-wheel forklift To be available, in which the forklift is effectively prevented from tipping over.
- the support element for Reduction of the acting between the support element and the road Frictional forces has a friction-reducing element.
- the friction between the support element and the roadway can be reduced
- the stability of the forklift can be improved. If the support element the Touched roadway, arise in the embodiment of the invention between the Support element and the road surface only low frictional forces and therefore only one low torque around that of the support element and a front wheel defined tipping edge.
- the friction reducing element is of formed a sliding element.
- the material and surface of the sliding element can the condition of the road in the forklift work area be adjusted.
- the formation of the sliding element is particularly expedient low-friction plastics such as PTFE.
- sliding element Since the sliding element is subject to wear due to friction, it is particularly useful if the sliding element is attached exchangeably. On Worn sliding element can then be replaced with a new one without much effort be replaced.
- a particularly low friction between the support element and the road is achieved if the friction-reducing element is formed by a rolling element.
- the rolling element is rotatably mounted on the forklift and rolls on the road, when it comes in contact with it.
- the rolling element has a ball roller.
- the ball roller is the same in every possible direction on the road low friction movable, so has no preferred direction. So that becomes a The forklift tips over regardless of the steering angle of the rear wheel unit equally effectively prevented in every operating situation.
- the position of the axis of rotation automatically adapt to the current direction of movement of the forklift.
- the vertical axis of the axis of rotation cylindrical roller is spaced in the horizontal direction.
- the automatic The axis of rotation is set in the same way as for a swivel castor.
- At least one spring element is expediently provided, with which the The intermediate piece is biased into a preferred position.
- the cylindrical roller has thus a defined rest position, in which the axis of rotation essentially in Longitudinal direction of the forklift is arranged. In use, when the role with the If the road comes into contact, the roller automatically adjusts itself to the current direction of movement of the counterweight.
- Figure 1 shows a 3-wheel forklift with a vehicle frame 1, one Driver's cab 2, a mast 3 arranged in front of the driver's cab and an am rear end of the vehicle frame 1 attached counterweight 4.
- a front axle is fastened with two front wheels 5.
- a steerable rear wheel unit 6 is located in the area of the counterweight 4 and can be attached directly to the counterweight 4 or to the vehicle frame 1.
- the rear wheel unit 6 is of a double wheel formed, the two single wheels rotatably mounted on a common axis having.
- the rear wheel unit can be formed by a single wheel.
- the tilting movement begins about a tilt axis which is defined by the road contact points of the rear wheel unit 6 and a front wheel 5 is defined.
- the tilting movement of the forklift braking it is known at the outer lateral ends 7 of the counterweight 4 support elements to attach, which from a certain angle of inclination Forklift come into contact with the road and thereby the forklift support.
- the tilting axis of the forklift moves outwards and is then through the road contact points of the support element and the front wheel Are defined.
- the support elements are designed such that the Friction arising between the support element and the road surface if possible is low.
- the support element has a ball roller 10 trained rolling element.
- the ball roller 10 is in a on the counterweight 4th attachable bearing shell 11 mounted by means of rolling elements 12 and can be in any Rotate direction.
- rolling elements 12 can be in any Rotate direction.
- FIG. 3 A much simpler support element with a cylindrical roller 13 is shown in Figure 3.
- the roller 13 is rotatably mounted about an axis 14, which is immovably attached to the counterweight 4 by means of an axle fork 15.
- the friction between the support element and the lane is also very low.
- the axis 14 is essentially aligned so that it parallel to that through the support element and the corresponding front wheel 5 defined tilt axis runs.
- the axis 14 is approximately in the longitudinal direction of the Truck oriented.
- Figure 4 is a support element with a cylindrical roller 16 in plan view shown, which has a movable axis of rotation 17.
- the axis of rotation 17 is at one attached by an axle fork intermediate piece 18.
- the intermediate piece 18 is Movable about a vertically arranged pivot axis 19 on a holder 20 attached.
- a rest position of the roller 16 defines which the roller 16 assumes when it has no contact with the road. This rest position corresponds to the orientation of the non-movable roller 13 according to Fig. 3.
- FIG. 5 shows a support element designed as a conventional swivel roller.
- roller 22 is not in contact with the road.
- these two components are oriented around the pivot axis 24 according to the current direction of movement.
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)
- Vehicle Body Suspensions (AREA)
Abstract
Description
- Figur 1
- einen 3-Rad-Gabelstapler mit Abstützelementen am Gegengewicht,
- Figur 2
- ein eine Kugelrolle aufweisendes Abstützelement,
- Figur 3
- ein eine zylindrische Rolle aufweisendes Abstützelement,
- Figur 4
- ein Abstützelement mit einer zylindrischen Rolle mit bewegbarer Drehachse,
- Figur 5
- ein als Schwenkrolle ausgeführtes Abstützelement.
Claims (10)
- Gabelstapler mit zwei Vorderrädern (3) und einer im Bereich eines Gegengewichts (4) im Wesentlichen mittig angeordneten Hinterradeinheit (6), wobei auf mindestens einer Seite des Gegengewichts (4) ein Abstützelement derart angeordnet ist, dass es bei einer Neigung des Gabelstaplers in seitlicher Richtung mit der Fahrbahn in Kontakt tritt, dadurch gekennzeichnet, dass das Abstützelement zur Reduzierung der zwischen dem Abstützelement und der Fahrbahn wirkenden Reibungskräfte ein reibungsverminderndes Element aufweist.
- Gabelstapler nach Anspruch 1, dadurch gekennzeichnet, dass das reibungsvermindernde Element von einem Gleitelement gebildet ist.
- Gabelstapler nach Anspruch 2, dadurch gekennzeichnet, dass das Gleitelement austauschbar befestigt ist.
- Gabelstapler nach Anspruch 1, dadurch gekennzeichnet, dass das reibungsvermindernde Element von einem Rollelement gebildet ist.
- Gabelstapler nach Anspruch 4, dadurch gekennzeichnet, dass das Rollelement eine Kugelrolle (10) aufweist.
- Gabelstapler nach Anspruch 4, dadurch gekennzeichnet, dass das Rollelement eine zylindrische Rolle (13, 16) aufweist.
- Gabelstapler nach Anspruch 6, dadurch gekennzeichnet, dass die Drehachse (14, 17) der zylindrischen Rolle (13, 16) parallel oder in geringem Winkel zu einer Längsachse des Gabelstaplers angeordnet ist.
- Gabelstapler nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Drehachse (17) an einem um eine im Wesentlichen vertikale Achse (19) schwenkbaren Zwischenstück (18) befestigt ist.
- Gabelstapler nach Anspruch 8, dadurch gekennzeichnet, dass die vertikale Achse (19) von der Drehachse (17) der zylindrischen Rolle (16) in horizontaler Richtung beabstandet ist.
- Gabelstapler nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass mindestens ein Federelement (21) vorgesehen ist, mit der das Zwischenstück (18) in eine Vorzugsstellung vorgespannt ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10255912 | 2002-11-29 | ||
| DE2002155912 DE10255912A1 (de) | 2002-11-29 | 2002-11-29 | 3-Rad-Gabelstapler mit einem Gegengewicht |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1424306A1 true EP1424306A1 (de) | 2004-06-02 |
| EP1424306B1 EP1424306B1 (de) | 2009-01-07 |
Family
ID=32240528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20030025314 Expired - Lifetime EP1424306B1 (de) | 2002-11-29 | 2003-11-03 | 3-Rad-Gabelstapler mit einem Gegengewicht |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1424306B1 (de) |
| DE (2) | DE10255912A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007058694A1 (de) * | 2007-12-06 | 2009-06-10 | Jungheinrich Ag | Dreirädriges Fahrzeug, insbesondere Flurförderzeug mit Kippsicherung |
| DE102008047622A1 (de) | 2008-09-17 | 2010-04-15 | Still Gmbh | Gabelstapler |
| US11383773B2 (en) | 2020-06-29 | 2022-07-12 | Saudi Arabian Oil Company | Stability control for load transport vehicles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014102470A1 (de) | 2013-04-16 | 2014-10-16 | Linde Material Handling Gmbh | Flurförderzeug mit zumindest einer seitlichen Stützrolle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH594524A5 (en) * | 1975-08-15 | 1978-01-13 | Josef Kantorowicz | Three wheeled forklift truck of high stability |
| JPS57147971A (en) * | 1981-03-11 | 1982-09-13 | Nissan Motor Co Ltd | Safety device against turning-over of three-wheeled fork lift |
| JPH07187025A (ja) * | 1993-12-27 | 1995-07-25 | Toyota Autom Loom Works Ltd | 車両用横転防止キャスター装置 |
| JPH10157998A (ja) * | 1996-12-02 | 1998-06-16 | Toyota Autom Loom Works Ltd | 三輪式産業車輌 |
-
2002
- 2002-11-29 DE DE2002155912 patent/DE10255912A1/de not_active Withdrawn
-
2003
- 2003-11-03 DE DE50311042T patent/DE50311042D1/de not_active Expired - Lifetime
- 2003-11-03 EP EP20030025314 patent/EP1424306B1/de not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH594524A5 (en) * | 1975-08-15 | 1978-01-13 | Josef Kantorowicz | Three wheeled forklift truck of high stability |
| JPS57147971A (en) * | 1981-03-11 | 1982-09-13 | Nissan Motor Co Ltd | Safety device against turning-over of three-wheeled fork lift |
| JPH07187025A (ja) * | 1993-12-27 | 1995-07-25 | Toyota Autom Loom Works Ltd | 車両用横転防止キャスター装置 |
| JPH10157998A (ja) * | 1996-12-02 | 1998-06-16 | Toyota Autom Loom Works Ltd | 三輪式産業車輌 |
Non-Patent Citations (3)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 006, no. 253 (M - 178) 11 December 1982 (1982-12-11) * |
| PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10 30 November 1995 (1995-11-30) * |
| PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007058694A1 (de) * | 2007-12-06 | 2009-06-10 | Jungheinrich Ag | Dreirädriges Fahrzeug, insbesondere Flurförderzeug mit Kippsicherung |
| US7967335B2 (en) | 2007-12-06 | 2011-06-28 | Jungheinrich Aktiengesellschaft | Three-wheeled vehicle, in particular industrial truck comprising a stabilizing device |
| DE102008047622A1 (de) | 2008-09-17 | 2010-04-15 | Still Gmbh | Gabelstapler |
| US11383773B2 (en) | 2020-06-29 | 2022-07-12 | Saudi Arabian Oil Company | Stability control for load transport vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1424306B1 (de) | 2009-01-07 |
| DE50311042D1 (de) | 2009-02-26 |
| DE10255912A1 (de) | 2004-06-09 |
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