EP4304973A1 - Dispositif de levage pour lever une palette et excavateur l'incorporant - Google Patents

Dispositif de levage pour lever une palette et excavateur l'incorporant

Info

Publication number
EP4304973A1
EP4304973A1 EP22708549.5A EP22708549A EP4304973A1 EP 4304973 A1 EP4304973 A1 EP 4304973A1 EP 22708549 A EP22708549 A EP 22708549A EP 4304973 A1 EP4304973 A1 EP 4304973A1
Authority
EP
European Patent Office
Prior art keywords
mast
lifting device
excavator
dipper arm
ground
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.)
Pending
Application number
EP22708549.5A
Other languages
German (de)
English (en)
Inventor
James Russell
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4304973A1 publication Critical patent/EP4304973A1/fr
Pending legal-status Critical Current

Links

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
    • B66F9/07559—Stabilizing means
    • 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
    • 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
    • B66F9/08—Masts; Guides; Chains
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine

Definitions

  • This invention relates to a lifting device for lifting a pallet wherein said lifting device can be fitted to a standard excavator, in particular to a back hoe, in order to use the excavator in the manner of a fork lift, and to an excavator incorporating same.
  • a disadvantage of using an excavator in lift activities is that the attachment path is severely limited to an arc centred on the dipper hinge, and when the attachment is lifted it moves away from the machine, increasing the radius and decreasing the safe load that may exceed the recommended limits, increasing the risk of instability and overturning of the excavator.
  • a lifting device for lifting a pallet comprising a mast upon which is mounted a load carrying means for supporting a load, wherein at least one ground engaging load bearing member is provided at a lower end of said mast to be moveable with respect to the mast between a raised position, wherein the load carrying means can adopt a loading position at or adjacent the ground, and a lowered position, wherein the ground engaging load bearing member engages the ground and supports the mast with the load carrying means at a load carrying position above the ground.
  • the load carrying means may comprise a pairs of tines for supporting a pallet thereon.
  • the ground engaging load bearing member is mounted on the mast via a carriage slideably coupled to the mast to permit movement of the ground engaging load bearing member between its raised and lowered positions.
  • the carriage is preferably slideably mounted on guide tracks provided on the mast.
  • the carriage is slideably mounted between opposed u-shaped guide tracks provided on the mast.
  • said at least one ground engaging load bearing member of the lifting device comprises at least one wheel.
  • Said at least one wheel may have an axis of rotation extending transverse to the mast.
  • said at least one ground engaging load bearing member comprises a beam coupled to the carriage and extending transverse the to mast and having a respective ground engaging wheel mounted at or adjacent either end thereof.
  • the beam may be coupled to the carriage via an articulated coupling permitting the beam to tilt with respect to a vertical axis of the mast to accommodate uneven ground.
  • the articulated coupling may comprise a pivot having an axis extending perpendicular to the mast. Said pivot may be adapted to be above the centre of gravity of a load carried by the load carrying means for stability.
  • a drive means is preferably provided for moving the ground engaging load bearing member between its raised and lowered positions.
  • the drive means may comprise a ram mounted on said mast.
  • the ram may act between the mast and a carriage or slider slideably mounted on the mast and upon which the ground engaging load bearing member may be mounted.
  • the mast is adapted to be releasably mounted on a dipper arm of an excavator in an upright orientation.
  • the mast may be adapted to be mounted on a dipper arm of an excavator to be parallel to or substantially parallel to the dipper arm.
  • an excavator comprising a chassis having a boom mounted thereon and a dipper arm pivotally coupled to a distal end of said boom to which an implement, such as a bucket, may be attached, a lifting device in accordance with the first aspect of the invention being releasably mounted on the dipper arm of the excavator in an upright orientation.
  • the mast may be mounted on the dipper arm to be parallel to or substantially parallel to the dipper arm.
  • a linkage may extend between a lower end of the mast of the lifting device and the chassis of the excavator. Preferably said linkage is adjustable in length. In one embodiment the linkage may comprise at least one single or double acting ram.
  • the mast may be releasably coupled to the dipper arm at an upper end thereof and to a quick hitch coupler mounted on the dipper arm at a lower end of the mast.
  • the mast at an upper end thereof, may be releasably coupled to a pivot pin providing pivotal connection between the boom and dipper arm.
  • Figure 1 is a front view of a lifting device in accordance with a first embodiment of the present invention
  • Figures 2 is a side view of the lifting device of Figure 1 with the wheels in a raised position and the tines in a loading position at or adjacent the ground;
  • Figure 3 is a side view of the lifting device of Figure 1 with the wheels in a lowered position and the tines at a load carrying position above the ground;
  • Figure 4 is an exploded view of the mast of the lifting device of Figure 1 ;
  • Figure 5 is an exploded view of the carriage and axle assembly of the lifting device of Figure 1.
  • a lifting device 2 in accordance with an embodiment of the present invention is adapted to allow a standard excavator to be transformed into a fork lift in order to lift and move a palletised load.
  • the term excavator is understood to cover a vehicle of item of construction equipment which comprises a chassis having a boom 4 mounted thereon and a dipper arm 6 pivotally coupled to a distal end of said boom 4, a quick coupler being provided at a distal end of the dipper arm 6 to which an implement, such as a bucket, may be attached.
  • the boom 4 and dipper arm 6 may be articulated to operate the implement attached to the quick coupler via a series of double acting rams mounted to operate between the chassis and boom 4, between the boom 4 and dipper arm 6 and between the quick coupler and dipper arm 6, as is conventional in the art.
  • the lifting device 2 comprises a mast 10 which is designed to be releasably coupled to and supported on a front face of the dipper arm 6 of the excavator, such that the mast 10 is supported in an upright orientation on the excavator with the dipper arm 6 arranged as shown in Figures 2 and 3.
  • An adjustable length linkage 12 preferably in the form of a single or double acting ram, extends rearwardly from a rear side of the mast 10 and is coupled to the chassis of the excavator to align and maintain the mast 10 in a vertical orientation. Flowever, said linkage 12 may be omitted.
  • the mast 10 may be coupled to the dipper arm 6 of the excavator at an upper end (or at other locations on the dipper arm 6) by means of hooks 14 engaged over laterally extending pins 16 provided on the dipper arm 6.
  • These pins 16 may comprise part of a pivot pin providing pivotal coupling between the boom 4 and dipper arm 6.
  • Latch members (not shown) may be provided for locking the pins 16 within the hooks 14.
  • the mast 10 is coupled to the dipper arm adjacent its lower end via a suitable coupling device, such as a locking pin 18 extending through cooperating apertures in the mast 10 and dipper arm 6 or to a mounting means of a quick hitch coupling provided on a distal end of the dipper arm 6.
  • a pair of laterally extending tines or forks 20,22 extending from a lower end of the mast 10, perpendicular to the mast, for supporting a pallet thereon.
  • the tines 20,22 may be detachably mounted in position on the mast 10 but, once mounted, are fixed in position with respect to the mast. Instead of tines it is envisaged that a lifting platform or any other load carrying means may be attached to the mast.
  • Ground engaging wheels 24 are mounted on a carriage 26 slideably mounted on a lower end of mast such that the wheels 24 may be moved between a raised position, shown in Figure 2, wherein the tines 20,22 can adopt a loading position at or adjacent the ground to allow the tines 20,22 to be slid under a palletised load, and a lowered position, shown in Figure 3, wherein the wheels 24 engage the ground and support the mast 10 with the tines 20,22 at a load carrying position above the ground.
  • Rollers 28 or similar couplings may be provided on the carriage 26 engaged with channels 30 or similar cooperating means on the mast 10 to constrain the carriage 26 to movement between its raised and lowered positions on the mast 10.
  • the mast 10 incorporates opposing vertically arranged U shaped channels 30 between which are mounted the carriage 26, with the rollers 28 of the carriage 26 being guided for travel within said channels 30.
  • a ram 32 may be mounted on the mast 10 (or dipper arm 6) and may be coupled to the carriage 26 to move the carriage 26, and the wheels 24, between its raised and lowered positions on the mast 10.
  • the tines 20,22 are preferably arranged substantially parallel to the ground. Rough terrain forks need to be able to slide into a pallet on uneven ground, and thus the tines 20,22 may be mounted to permit upward displacement or tilting of the tines, as is known in the art.
  • the wheels 24 are mounted at either end of a beam 34 pivotally coupled to the carriage 26 via a pivot pin 36 extending horizontally and perpendicular to the mast 10 such that the beam 34 can tilt with respect to a vertical axis of the mast 10 to accommodate uneven ground while maintaining the mast 10 in a vertical orientation.
  • the carriage 26 comprises a substantially vertically arranged guide portion extending between the channels 30 of the mast 10 and upon which the rollers 28 are mounted, and a horizontally extending support portion extending from an upper end of the guide portion and from which the beam 34 mounting the wheels 24 is suspended via the pivot pin 36.
  • the pivot pin 36 is arranged at a position to be above the centre of gravity of a load carrying by the tines 20,22 so that the load is suspended below said pivot pin 36 for added stability.
  • the lifting device 2 can be readily coupled to the dipper arm 6 of an excavator when it is desired to use the excavator to handle palletised loads.
  • the linkage/ram 12 and boom 4 of the excavator can be initially manipulated to raise the dipper arm 6 and the attached lifting device 2, with the carriage 26 and wheels 24 in their raised position, such that the wheels 24 of the lifting device 2 are raised from the ground, permitting the excavator to be readily manoeuvred into position adjacent a palletised load to be handled.
  • the excavator can be advanced to bring the tines 21,22 into engagement with a pallet.
  • the ram 32 of the lifting device 2 can be extended to move the carriage 26 and wheels 24 to their extended position, such that the wheels 24 engage the ground and lift the mast 10, along with the tines 20,22 and pallet, along with the load provided thereon.
  • at least a portion of the weight of the load is transferred to the wheels 20,22 of the lifting device 2, and thereby the ground, such that the load is not wholly supported by the boom 4.
  • the mast 10 is preferably maintained in an upright position and may be tilted forwardly or rearwardy with respect to a vertical axis through an angle of approximately 10° in order to tilt the tines for loading and to retain a load thereon.
  • the excavator can then be manoeuvred to carry the load to a desired location before the ram 32 operated to move the carriage 26 and wheels 24 to their raised position with respect to the mast 10 to move the tines back to their loading position and place the pallet carried thereon onto the ground or any other desired location.
  • the articulation of the beam 34 on the carriage 26 allows the excavator and lifting device 2 to traverse uneven ground without placing a twisting load on the carriage 26 or mast 10.

Landscapes

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

Abstract

Dispositif de levage pour lever une palette comprenant un mât sur lequel est monté un moyen de transport de charge, telle qu'une paire de dents, pour supporter une charge, au moins un élément de support de charge venant en prise avec le sol étant disposé au niveau d'une extrémité inférieure dudit mât pour être mobile par rapport au mât entre une position relevée, le moyen de transport de charge pouvant adopter une position de chargement au niveau ou à proximité du sol, et une position abaissée, l'élément de support de charge venant en prise avec le sol venant en prise avec le sol et supportant le mât avec le moyen de transport de charge au niveau d'une position de transport de charge au-dessus du sol. De préférence, le dispositif de levage est adapté pour être monté sur un bras d'un excavateur pour être parallèle ou sensiblement parallèle au bras.
EP22708549.5A 2021-03-11 2022-02-28 Dispositif de levage pour lever une palette et excavateur l'incorporant Pending EP4304973A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2103387.3A GB2604638B (en) 2021-03-11 2021-03-11 A lifting device for lifting a pallet
PCT/EP2022/054943 WO2022189181A1 (fr) 2021-03-11 2022-02-28 Dispositif de levage pour lever une palette et excavateur l'incorporant

Publications (1)

Publication Number Publication Date
EP4304973A1 true EP4304973A1 (fr) 2024-01-17

Family

ID=75622981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22708549.5A Pending EP4304973A1 (fr) 2021-03-11 2022-02-28 Dispositif de levage pour lever une palette et excavateur l'incorporant

Country Status (3)

Country Link
EP (1) EP4304973A1 (fr)
GB (1) GB2604638B (fr)
WO (1) WO2022189181A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE568175A (fr) * 1957-05-31
CH428564A (de) * 1962-02-26 1967-01-15 Irion & Vosseler Flurfördergerät
GB1373646A (en) 1972-05-04 1974-11-13 Gibbons W Fork lift attachment
IE20020724A1 (en) * 2002-09-06 2004-03-10 Moffett Res & Dev Ltd Improvements in and relating to fork lift trucks
JP5868107B2 (ja) * 2011-10-11 2016-02-24 ユニキャリア株式会社 リーチ式フォークリフト
KR101389526B1 (ko) * 2012-03-26 2014-04-25 김진용 스키드로더용 마스트 조립체
GB2585871A (en) * 2019-07-18 2021-01-27 Russell James An excavator having a lifting device for lifting a pallet

Also Published As

Publication number Publication date
WO2022189181A1 (fr) 2022-09-15
GB2604638A (en) 2022-09-14
GB2604638B (en) 2023-07-05
GB202103387D0 (en) 2021-04-28

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