GB2565546A - Device for an excavator - Google Patents

Device for an excavator Download PDF

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Publication number
GB2565546A
GB2565546A GB1712983.4A GB201712983A GB2565546A GB 2565546 A GB2565546 A GB 2565546A GB 201712983 A GB201712983 A GB 201712983A GB 2565546 A GB2565546 A GB 2565546A
Authority
GB
United Kingdom
Prior art keywords
mast
excavator
boom
carriage
dipper 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
GB1712983.4A
Other versions
GB2565546B (en
GB201712983D0 (en
GB2565546A8 (en
Inventor
Bailie Russell James
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
Priority to GB1712983.4A priority Critical patent/GB2565546B/en
Publication of GB201712983D0 publication Critical patent/GB201712983D0/en
Priority to PCT/EP2018/071930 priority patent/WO2019034612A1/en
Publication of GB2565546A publication Critical patent/GB2565546A/en
Publication of GB2565546A8 publication Critical patent/GB2565546A8/en
Application granted granted Critical
Publication of GB2565546B publication Critical patent/GB2565546B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • 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
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • 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
    • 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

Landscapes

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

Abstract

A device comprises a mast 10 upon which is slideably mounted a carriage 26 with a pair of spaced tines or forks 28 for supporting a pallet thereon, wherein the mast 10 is adapted to be mounted on the boom 2 of an excavator 1 in a vertical orientation. The excavator 1 may comprise a chassis upon which is mounted a boom 2 with a dipper arm 3 pivotally coupled to a distal end of the boom 2 to which dipper arm 3 an implement, such as a bucket 4, may be attached. The mast 10 may be mounted to the boom 10 by means of hooks 16 engaging pins 18 and secured with latch members (20 fig. 3) or the mast 10 may be mounted using pins (22 fig. 4) engaging with holes (24 fig. 4) in mounting plates (25 fig. 4). The mast 10 may include an abutment or support member 14 to engage with the excavator 1 and maintain the vertical orientation of the mast 10. The carriage 26 may be raised and lowered by a ram 32 mounted on the mast 10 or on the excavator 1. Alternatively the carriage 26 may be raised and lowered by a dipper ram 5 acting via a cable 36 and a movable guide pulley 38.

Description

Device for an Excavator
Field of Invention
This invention relates to a device for an excavator which can be fitted to a standard excavator, in particular to a back hoe, in order to use the excavator as a fork lift.
Background of Invention
The use of a variety of tool attachments for excavators such as buckets, rakes, thumbs, hammers etc. is known in the prior art. In particular it is known to provide a fork attachment in lieu of or attached a bucket of an excavator to enable the excavator to lift palletised objects (for example see GB 1,373,646). However, excavator manufacturers publish tables detailing the lift capacities of their excavators when using attachments mounted at the end of the dipper arm. 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.
It is therefore an object of the present invention to advance the technology for excavator arm attachments in order to make the swapping between excavator/lift activities more efficient, to increase the safe range of lift capacities for excavators and to introduce a new means of adapting an existing excavator to make it suitable for fork lift activities.
Summary of Invention
According to a first aspect of the invention, there is provided a device for 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, said device comprising a mast upon which is slidably mounted a carriage, said carriage being slideably mounted on said mast, a pair of spaced tines being provided on said carriage for supporting a pallet thereon, wherein said mast is adapted to be mounted on said boom of said excavator in a vertical orientation such that, in use, said carriage can be moved between lowered and raised positions on said mast when the mast is mounted on said boom.
Preferably the mast includes an abutment arranged to engage said excavator to maintain the mast in a substantially vertical orientation when the mast is supported on the boom of the excavator.
Preferably a drive means is provided for moving the carriage between its lowered and raised positions.
In one embodiment said drive means comprises a ram mounted on said mast.
In an alternative embodiment said drive means comprises a ram mounted on said excavator. Preferably said excavator includes a ram acting between the dipper arm and a linkage member pivotally mounted on the dipper arm for operating said implement mountable on the dipper arm and coupled to the linkage member via at least one link rod, the device further comprising a first guide mounted adjacent a proximal end of the dipper arm; a second guide mounted on said linkage member adjacent a distal end of the dipper arm; an anchored cable extending between the first and second guides, wherein a distal end of said cable is coupled to the carriage such that extension of the at least one ram displaces the second guide away from the first guide and moves the carriage towards its raised position. The cable may be anchored to a point on the dipper arm. Alternatively the cable may be anchored to one of the first and second guides.
In one embodiment the free end of the cable depends from a further guide mounted on the boom. The first guide may be mounted on the dipper arm or on the boom of the excavator.
According to a further aspect there is provided an excavator comprising a boom and a device as claimed in any preceding claim wherein, in use, the device is releasably mounted on the boom of the excavator.
Brief Description of Drawings
An embodiment of the present invention will now be described with reference to the accompanying drawings, in which:
Figure 1 is a side view of a fork lift device in accordance with a first embodiment of the present invention for an excavator in use, fitted to a boom of a standard excavator;
Figures 2 and 3 illustrates a mounting arrangement for mounting the mast of the device of Figure 1 to the boom of the excavator;
Figure 4 illustrates an alternative mounting arrangement for mounting the mast of the device of Figure 1 to the boom of the excavator;
Figure 5 to 7 illustrates different mounting arrangements of the actuating ram of the device of Figure 1; and
Figure 8 is a side view of a fork lift device in accordance with a further embodiment of the present invention for an excavator in use, fitted to a boom of a standard excavator.
Detailed Description of Drawings
Referring now to Figure 1 of the accompanying drawings, there is illustrated a first embodiment of a fork lift device for an excavator 1, which is designed to allow a standard excavator to be transformed into a fork lift in order to lift a palletised load. The term excavator is understood to include machinery such as a backhoe, trackhoe, bulldozer, crawler, diggers etc. or any other heavy construction equipment which comprises a boom 2, a dipper arm 3 and an implement 4 (a bucket in this case), the implement 4 being activated through hydraulic means via the movement of a hydraulic dipper ram 5 on the dipper or hydraulic boom rams 6,7 on the boom 2, or a combination of the movement of all of these rams 5,6,7.
The device comprises a mast 10 which is designed to be connected to and supported from the boom 2 of an excavator via a coupling 12, such that the mast 10 is supported in a vertical orientation on the excavator 1. A support member 14 extends rearwardly and laterally from a rear side of the mast 10 to engage a portion ofthe excavator to align and maintain the mast 10 in a vertical orientation.
As illustrated in Figures 2 and 3, the mast 10 may be coupled to the boom 2 of the excavator 1 by means of hooks 16 engaged over laterally extending pins 18 provided on the boom 2. Latch members 20 may be provided for locking the pins 18 within the hooks 16.
Alternatively, as shown in Figure 4, the mast 10 may be coupled to the boom 2 via upwardly extending pins 22 provided on the boom 2 engaged in holes 24 provided in mounting plates 25 provided on the mast 10.
A carriage 26 is slideably mounted on the mast 10, a pair of laterally extending tines 28 extending from the carriage 26 for supporting a pallet thereon. Rollers 30 may be provided on the carriage engaged with channels in the mast 10 to constrain the carriage to movement between raised and lowered positions on the vertically arranged mast 10.
In the embodiment shown in Figure 1, a ram 32 is mounted on the mast and is coupled to the carriage 26 to move the carriage between its raised and lowered positions on the mast 10.
The ram 32 may be coupled to the carriage via a cable 34 extending around pulleys 35, whereby extension of the ram 32 causes the carriage 26 to be raised with respect to the mast 10. One end 36 of the cable 34 may be coupled to the body of the ram 32 while the opposite end 38 may be coupled to the carriage 26.
Figures 5 to 7 illustrate different ways to couple to the carriage 26 to the ram 32 via different pulley arrangements. Normally a forklift has single ram in the centre of the mast. However, here the boom 2 occupies this position in this system. Therefore, as shown in Figures 5A and 5B, the ram 32 may be offset to one side of the mast
10. In the embodiment shown in Figures 5 and 6, pulleys are provided to link the single ram 32 to both sides of the carriage 26. In the embodiment shown in Figure 6, a pair of rams 32A,32B are provided, one on each side of the mast 10. In the embodiment shown in Figure 7, a single central ram 32 is provided.
The tines are preferably substantially parallel to the ground. Rough terrain forks need to be able to slide into a pallet on uneven ground, and thus the forks may be mounted to permit upward displacement or tilting of the forks, as is known in the art.
The excavator 1 includes a hydraulic dipper ram 5, such that movement of the hydraulic dipper ram 5 generates a pivotal movement of the bucket 4 via an intervening linkage member 8 against which the dipper ram 5 acts and one or more link rods 9 acting between the linkage member 8 and the bucket 4 or coupling thereof.
In the embodiment shown in Figure 8, the dipper ram 5 is used to raise and lower the carnage 26 on the mast 10 via a cable and pulley arrangement, wherein a cable 36 extends from an anchor point 37 on the dipper arm 3, around a first guide pulley 38 mounted at an outer end of the linkage member 8 (or alternatively on linkage 9), passes around a second guide pulley 40 on the dipper arm adjacent the pivot axis between the dipper arm 3 and the boom 2, and around a third guide pulley 42 mounted on the boom 2 adjacent an upper end of the mast 10, when coupled to the boom 2, a distal end of said cable 36 being coupled to the carriage 26, such that extension of the dipper ram 5 displaces the first pulley 38 away from the anchor point 37, thereby raising the carriage 26 up the mast 10. Further pulleys may be provided around which the cable 36 may be passed to magnify the motion of the first pulley, thereby increasing the range of movement of the carriage.
The guide pulleys may take the form of pulleys, sheaves, protrusions or any other shapes comprising a partially curved surface about which the cable can run without obstruction.

Claims (12)

1. A device for 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, said device comprising a mast upon which is slideably mounted a carriage, said carriage being slideably mounted on said mast, a pair of spaced tines being provided on said carriage for supporting a pallet thereon, wherein said mast is adapted to be mounted on said boom of said excavator in a vertical orientation such that, in use, said carriage can be moved between lowered and raised positions on said mast when the mast is mounted on said boom.
2. A device as claimed in claim 1, wherein the mast includes an abutment arranged to engage said excavator to maintain the mast in a substantially vertical orientation when the mast is supported on the boom of the excavator.
3. A device as claimed in claim 1 or claim 2, wherein drive means are provided for moving the carriage between its lowered and raised positions.
4. A device as claimed in claim 3, wherein said drive means comprises a ram mounted on said mast.
5. A device as claimed in claim 3, wherein said drive means comprises a ram mounted on said excavator.
6. A device as claimed in claim 5, wherein said excavator includes a ram acting between the dipper arm and a linkage member pivotally mounted on the dipper arm for operating said implement mountable on the dipper arm and coupled to the linkage member via at least one link rod, the device further comprising a first guide mounted adjacent a proximal end of the dipper arm; a second guide mounted on said linkage member adjacent a distal end of the dipper arm; an anchored cable extending between the first and second guides, wherein a distal end of said cable is coupled to the carriage such that extension of the at least one ram displaces the second guide away from the first guide and moves the carriage towards its raised position.
7. A device as claimed in claim 6, wherein the cable is anchored to a point on the dipper arm.
8. A device as claimed in any of 6, wherein the cable is anchored to one of the first and second guides.
9. A device as claimed in any of claims 6 to 8, wherein the free end of the cable depends from a further guide mounted on the boom.
10 A device as claimed in any of claims 6 to 9, wherein the first guide is mounted on the dipper arm.
11. A device as claimed in any of claims 6 to 10, wherein the first guide is mounted on the boom.
12. An excavator comprising a boom and a device as claimed in any preceding claim wherein, in use, the device is releasably mounted on the boom of the excavator.
GB1712983.4A 2017-08-14 2017-08-14 An excavator Expired - Fee Related GB2565546B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1712983.4A GB2565546B (en) 2017-08-14 2017-08-14 An excavator
PCT/EP2018/071930 WO2019034612A1 (en) 2017-08-14 2018-08-13 Device for an excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1712983.4A GB2565546B (en) 2017-08-14 2017-08-14 An excavator

Publications (4)

Publication Number Publication Date
GB201712983D0 GB201712983D0 (en) 2017-09-27
GB2565546A true GB2565546A (en) 2019-02-20
GB2565546A8 GB2565546A8 (en) 2019-02-27
GB2565546B GB2565546B (en) 2022-03-30

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ID=59895980

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GB1712983.4A Expired - Fee Related GB2565546B (en) 2017-08-14 2017-08-14 An excavator

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GB (1) GB2565546B (en)
WO (1) WO2019034612A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2585871A (en) * 2019-07-18 2021-01-27 Russell James An excavator having a lifting device for lifting a pallet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034874A (en) * 1973-10-19 1977-07-12 International Harvester Company Hose supporting linkage
JPS532863A (en) * 1976-06-25 1978-01-12 Kubota Ltd Working vehicle
WO2008055289A1 (en) * 2006-11-06 2008-05-15 Cps Investment Holdings Pty Ltd Brace removal apparatus and method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941685A (en) * 1959-09-04 1960-06-21 Robert F Mccune Fork lift attachment for a crane
US3374901A (en) * 1965-05-06 1968-03-26 Ferwerda Ray Live boom supporting live boom or hoist track
US3647099A (en) * 1969-12-11 1972-03-07 Pettibone Corp Interposable mast
FR2205605B3 (en) * 1972-11-08 1976-09-17 Lundbergs Mek Brdr
US3966070A (en) * 1974-10-07 1976-06-29 Allis-Chalmers Corporation Mechanism for loader bucket or forklift mast on a material handling vehicle
JPS6218634Y2 (en) * 1980-10-31 1987-05-13
JPH0958989A (en) * 1995-08-29 1997-03-04 Furukawa Co Ltd Wheel loader
JPH0995965A (en) * 1995-09-29 1997-04-08 Kazuki Kobayashi Hoist gear for mounting on back hoe
DE202014004566U1 (en) * 2014-05-30 2014-07-16 Friedrich Ganzmann Lifting device for coupling to the changing devices of Hofladern, front loaders and three-point linkage to increase the lifting height of the implements

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034874A (en) * 1973-10-19 1977-07-12 International Harvester Company Hose supporting linkage
JPS532863A (en) * 1976-06-25 1978-01-12 Kubota Ltd Working vehicle
WO2008055289A1 (en) * 2006-11-06 2008-05-15 Cps Investment Holdings Pty Ltd Brace removal apparatus and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB2565546B (en) 2022-03-30
GB201712983D0 (en) 2017-09-27
WO2019034612A1 (en) 2019-02-21
GB2565546A8 (en) 2019-02-27

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20230814