GB2079246A - Loader/excavator vehicle - Google Patents

Loader/excavator vehicle Download PDF

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Publication number
GB2079246A
GB2079246A GB8120587A GB8120587A GB2079246A GB 2079246 A GB2079246 A GB 2079246A GB 8120587 A GB8120587 A GB 8120587A GB 8120587 A GB8120587 A GB 8120587A GB 2079246 A GB2079246 A GB 2079246A
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GB
United Kingdom
Prior art keywords
loader
arm assembly
vehicle according
vehicle
booms
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
GB8120587A
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GB2079246B (en
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.)
JC Bamford Excavators Ltd
Original Assignee
JC Bamford Excavators Ltd
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 JC Bamford Excavators Ltd filed Critical JC Bamford Excavators Ltd
Priority to GB8120587A priority Critical patent/GB2079246B/en
Publication of GB2079246A publication Critical patent/GB2079246A/en
Application granted granted Critical
Publication of GB2079246B publication Critical patent/GB2079246B/en
Expired legal-status Critical Current

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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
    • E02F3/96—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
    • 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
    • E02F3/34—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E02F3/3402—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines the arms being telescopic

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

A vehicle comprises a body (2), ground engaging propulsion means (9, 10), and a loader arm assembly (3), the loader arm assembly (3) comprising a pair of space telescopic booms (16) defining a space therebetween, a part of the body (33) extending into the space, at least when the loader arm assembly is in a low position, a loader implement (24) being mounted on the arm assembly (3) being extendable and retractable relative to the body (2) of the vehicle by fluid operated means. As shown the vehicle includes an excavating arm assembly 4. <IMAGE>

Description

SPECIFICATION Loader/excavating vehicle This invention relates to a vehicle of the type comprising a body, a ground engaging propulsion means, one end of a loader arm assembly mounted on a support part of the body for rotation about a first horizontal axis between a first upper position and a second lower position, the loader arm assembly carrying at its other end, for rotation about a second horizontal axis a loader implement, fluid operated means being provided to pivot said loader arm assembly about said first horizontal axis, and to cause pivotal movement of the implement relative to the loader arm assembly about said second horizontal axis, the body having an engine or engines to drive wheels or tracks of the ground engaging propulsion means and to power said fluid operated means, the ground engaging propulsion means and the fluid operated means being controllable from an operating station. The operating station may comprise for example an operator's cab. Vehicles of this type will hereinafter be referred to as "loader vehicles of the type described".
The vehicle may have said loader arm assembly mounted at one end of the body and a base part of an excavating arm pivotally mounted at the other end of the body, the base part having pivoted thereto a dipper arm, and an excavating tool being pivotally mounted on the dipper arm, fluid operated means being provided to raise and lower the excavating arm, to pivot the dipper arm relative to the base part and to pivot the excavating tool relative to the dipper arm. Vehicles of this type will hereinafter be referred to as "loader/excavator vehicles of the type described".
According to the invention we provide a loader vehicle of the type described, the loader arm assembly comprising a pair of spaced booms defining a space therebetween, a part of the body spaced from said first horizontal axis extending into the space, at least when the arm assembly is in its second lower position, the loader implement being extendable and retractable relative to the body of the vehicle by fluid operated means.
Hithertofore, in loader vehicles of the type described the loader implement has not been extendable or retractable relative to the body of the vehicle. The arrangement in the vehicle according to the invention has been found to provide at least the following advantages.
First, the loader implement can be filled, whilst the vehicle is stationary, by extending the implement, or even, in a loader/excavating vehicle, whilst the excavating arm is in use.
Secondly, the filled implement may be retracted so that the load is nearer to the centre of gravity of the vehicle thus greatly improving the stability of the vehicle when loaded, especially whilst travelling.
Thirdly, the load can be lifted to a height greater than the retracted length of the arm assembly to facilitate for example, the emptying of the load into a lorry and/or the load can be emptied from the implement at a greater distance from the vehicle than the retracted length of the arm assembly.
Preferably, the booms of the loader arm assembly each comprise first outer and second inner telescoped members, the inner members being movable relative to the outer members by the fluid operated means which may comprise a hydraulic ram or rams of known type comprising a cylinder and movable piston.
Preferably, one hydraulic ram is positioned within each boom, the cylinder of each ram being connected to one telescoped member and the piston of the ram being connected to the other telescoped member However, if desired the fluid operated means may be located externally of the boom members.
The operating station may comprise an operator's cab from which each of the fluid operated means of the loader arm assembly and the excavating arm assembly and the ground engaging propulsion means may be controlled.
The body part of the vehicle either side of which the booms extend, may in one type of vehicle comprise a bonnet under which the engine or engines may be housed, and the loader arm assembly, when in its first upper position, may extend above said bonnet. In a different vehicle however, the body part may comprise another body part such as an operator's cab, above which the loader arm assembly, when in its first upper position, does not extend.
The ground engaging propulsion means may comprise at least two pairs of wheels either providing said ground wheels, or wheels engaging and driving said tracks, and the first horizontal axis may be located longitudinally of the vehicle approximately halfway between said pairs of wheels.
Preferably, said body part which extends between said pair of booms is located substantially over one of said pairs of wheels.
The space between said booms may extend for approximately half the retracted length of the booms.
The loader implement may comprise a loading bucket or a pair of forks or any other loader implement, and the loader implement may be mounted on a mounting part which interconnects the pair of booms.
To facilitate loading and emptying of the implement, the vehicle may be provided with a self-levelling device such as described and claimed in our co-pending application No.
2,002,220A which was published on the 12th December 1979 so that the implement may be maintained in a particular orientation relative to the ground as the loader arm assembly is moved between its upper and lower positions.
The vehicle may comprise a loader/excavating vehicle of the type described and the excavating arm assembly may comprise an arm such as described in detail for example in our previous patent 1023175. If desired, in such a loader/excavating vehicle, the excavating arm assembly may also be provided with a selflevelling device.
The invention will now be described in more detail by way of example, with reference to the accompanying drawings in which: FIGURE 1 is a side view of a loader/excavating vehicle according to the invention; and FIGURE 2 is an enlarged side view of the loader arm assembly of the vehicle of Figure 1.
Referring to the drawings, a loader/excavating vehicle 1 comprises a body 2 with a loader arm assembly 3 at the front end of the body 2 and an excavating arm assembly 4 at the rear end of the body 2.
The excavating arm assembly 4 comprises a base part 5 pivotally mounted at one end thereof to the vehicle 1 for rotation about horizontal and vertical axes, and having a dipper arm 6 pivoted thereto at the other end.
The dipper arm 6 carries an excavating tool comprising a bucket 7.
Fluid operated means 8, only a hydraulic rams of which can be seen, are provided to cause pivotal movement of the various parts of the excavating arm assembly 4.
The body 2 of the vehicle 1 is mounted on a ground engaging propulsion means including a front pair 9 and a rear pair 10 of drive wheels. An engine (not shown) is provided beneath a bonnet 33 to provide power to the ground engaging propulsion means and to a pump (not shown) of the fluid operated means 8 of the excavating arm assembly 4, and the fluid operated means described below, of the loader arm assembly 3.
The bonnet 33 is located substantially over the front pair of wheels 9.
The engine and the fluid operated means are each controllable from within an operator's cab 12 of the body 2.
The loader arm assembly 3 is attached to a support part 13 at the front of the body 2 for pivotal movement about a horizontal axis 1 5. The loader arm assembly 3 comprises a pair of booms 16, each boom comprising a first outer boom member 17 and a second inner boom member 18 telescopically received in the outer boom member 17.
The loader arm assembly 3 may be moved between an upper position U shown in chain dotted lines in Figure 2 and a lower position D shown in full lines in Figure 2, wherein the bonnet 33 is received in a space between the booms 16, by fluid operated means comprising two pairs of hydraulic rams 1 9a, 1 9b, one ram of each pair being operatively connected to each of the booms 16.
In the vehicle shown, it can be seen that the operator's cab 12 of the vehicle 1, is located behind the loader arm assembly 3. In a different vehicle however, the operator's cab 12 may be positioned at the front of the vehicle 1. In which case, the booms 1 6 would extend either side of the cab 12 at least in their lower position D, the cab 12 being received in the space between the booms.
Referring again to the drawings, each of the rams 1 9b are pivotally connected at one end to a plate 20 attached to one of the outer boom members 17, and are pivotally connected at the other end to a plate 21 rigidly secured to the body 11 of the vehicle.
The hydraulic rams 19a,19b are arranged to operate so that by extending or retracting the rams, the loader arm assembly 3 may be moved between its lower D position and upper U position respectively.
The second inner boom members 1 8 of each boom 1 6 are each telescopically extendable and retractable relative to the outer boom member 1 7 by a further fluid operated means comprising a pair of hydraulic rams 22 one located within each outer boom member 17 and both arranged to operate synchronously.
The arm assembly 3 has at its outer end 23 a loader bucket assembly 24 secured thereto, comprising a mounting part 25 rigidly interconnecting the inner boom members 18. An excavating bucket 26 is attached to the mounting part 25 for pivotal movement about a horizontal axis 27.
The bucket 26 may be pivoted between a first loading position L shown in full lines in Figure 2, and a second tipping position T shown in chain dotted lines, by means of a yet further pair of hydraulic rams 28.
All of the hydraulic rams hereinbefore described are of known type, comprising a piston telescopically received within a cylinder. The pistons 31 of the rams 28 are attached to a bracket 29 of the loader bucket 26, and the cylinders 30 of the rams 28 are received in clamping formations 32 of the mounting part 25.
Thus the loader arm assembly 3 and hence the loader bucket 26 may be lifted or lowered by means of rams 19a, 19b, the loader bucket 26 extended or retracted relative to the boom 1 6 by means of rams 22 and tipped forwards or backwards by means of rams 28. The bucket 26 may therefore be loaded whilst the vehicle is stationary, by extending the bucket 26, lifted clear of the ground, retracted relative to the body 2 for stability in transport, and emptied by tipping forwards.
Although a vehicle having a single engine to provide power to the fluid operated means of the excavating arm assembly 4 and the loader arm assembly 3, as well as the ground engaging propulsion wheels 9, 10 has been described, if desired more than one separate engines may be provided. Further, instead of providing the ground engaging propulsion means with wheels 9, 10, a pair of endless tracks may alternatively be provided.
If desired, the associated hydraulic control circuitry of the loader arm assembly 3 and/or the excavating arm assembly 4 and the loader bucket 26 or excavating bucket 7 may be provided with a self-levelling device such as described and claimed in our co-pending application 2,022,220A which was published on the 12th December 1979.
Further, although the loader arm assembly 3 has been described as having a pair of hydraulic rams 22, one located within each boom 16, if desired the bucket 26 or other implement may be extendable or retractable relative to the body 2 by means of one or more rams located externally of the booms 16.

Claims (17)

1. A loader vehicle of the type described wherein the loader arm assembly comprises a pair of spaced booms defining a space therebetween, a part of the body spaced from said first horizontal axis extending into the space, at least when the arm assembly is in its second lower position, the loader implement being extendable and retractable relative to the body of the vehicle by fluid operated means.
2. A vehicle according to Claim 1 wherein the booms of the loader arm assembly each comprise first outer and second inner telescoped members, the inner members being movable relative to the outer members by the fluid operated means.
3. A vehicle according to Claim 2 wherein said fluid operated means comprise a hydraulic ram or rams of known type comprising a cylinder and movable piston.
4. A vehicle according to Claim 3 wherein one hydraulic ram is positioned within each boom, the cylinder of each ram being connected to one telescoped member and the piston of the ram being connected to the other telescoped member.
5. A vehicle according to any one of Claims 1 to 4 wherein the operating station comprises an operator's cab from which each of the fluid operated means of the loader arm assembly and the excavating arm assembly and the ground engaging propulsion means may be controlled.
6. A vehicle according to any one of Claims 1 to 5 wherein the body part of the vehicle either side of which the booms extend, comprises a bonnet under which the engine or engines are housed.
7. A vehicle according to Claim 6 wherein the loader arm assembly, when in its first upper position, extends above said bonnet.
8. A vehicle according to Claim 5 wherein the body part comprises the operator's cab, above which the loader arm assembly, when in its first upper position, does not extend.
9. A vehicle according to any one of the preceding claims wherein the ground engaging propulsion means comprises at least two pairs of wheels either providing said ground wheels, or wheels engaging and driving said tracks.
10. A vehicle according to Claim 9 wherein the first horizontal axis is located longitudinally of the vehicle approximately halfway between said pairs of wheels.
11. A vehicle according to Claim 9 or Claim 10 wherein said body part which extends between said pair of booms is located substantially over one of said pairs of wheels.
12. A vehicle according to any one of the preceding claims wherein the space between said booms extends for approximately half the retracted length of the booms.
13. A vehicle according to any one of the preceding claims wherein the loader implement comprises a loading bucket or a pair of forks.
14. A vehicle according to any one of the preceding claims wherein the loader implement is mounted on a mounting part which interconnects the pair of booms.
1 5. A vehicle according to any one of the preceding claims which is provided with a selflevelling device so that the implement may be maintained in a particular orientation relative to the ground as the loader arm assembly is moved between its upper and lower positions.
1 6. A vehicle according to any one of the preceding claims which is a loader/excavating vehicle of the type described.
17. A vehicle according to Claim 1 6 when dependent upon Claim 1 5 wherein the excavating arm assembly is also provided with a self-levelling device.
1 8. A vehicle substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
1 9. Any novel feature or novel combination of features described herein or shown in the accompanying drawings.
GB8120587A 1980-07-05 1981-07-03 Loader/excavator vehicle Expired GB2079246B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8120587A GB2079246B (en) 1980-07-05 1981-07-03 Loader/excavator vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8022110 1980-07-05
GB8120587A GB2079246B (en) 1980-07-05 1981-07-03 Loader/excavator vehicle

Publications (2)

Publication Number Publication Date
GB2079246A true GB2079246A (en) 1982-01-20
GB2079246B GB2079246B (en) 1983-11-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084067A2 (en) * 1982-01-14 1983-07-27 J.C. Bamford Excavators Limited Loader/excavating vehicle
FR2522636A1 (en) * 1982-03-03 1983-09-09 Jouannet Maxime Front loader for tractor - has tilting bucket pivoted on telescopic arm which is itself pivoted to frame
DE10346413A1 (en) * 2003-10-07 2005-05-04 Deere & Co Loading device, especially front loader for loader vehicle, has telescopic jibs which can be pivoted, extended and retracted independently
US10718098B1 (en) 2016-03-24 2020-07-21 The Toro Company Stand-on or walk-behind utility loader with variable length lift arm assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084067A2 (en) * 1982-01-14 1983-07-27 J.C. Bamford Excavators Limited Loader/excavating vehicle
EP0084067A3 (en) * 1982-01-14 1983-09-28 J.C. Bamford Excavators Limited Loader/excavating vehicle
FR2522636A1 (en) * 1982-03-03 1983-09-09 Jouannet Maxime Front loader for tractor - has tilting bucket pivoted on telescopic arm which is itself pivoted to frame
DE10346413A1 (en) * 2003-10-07 2005-05-04 Deere & Co Loading device, especially front loader for loader vehicle, has telescopic jibs which can be pivoted, extended and retracted independently
US10718098B1 (en) 2016-03-24 2020-07-21 The Toro Company Stand-on or walk-behind utility loader with variable length lift arm assembly
US10975543B2 (en) 2016-03-24 2021-04-13 The Toro Company Stand-on or walk-behind utility loader with variable length lift arm assembly

Also Published As

Publication number Publication date
GB2079246B (en) 1983-11-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960703