EP0867566B1 - Stabilizer leg - Google Patents

Stabilizer leg Download PDF

Info

Publication number
EP0867566B1
EP0867566B1 EP98105241A EP98105241A EP0867566B1 EP 0867566 B1 EP0867566 B1 EP 0867566B1 EP 98105241 A EP98105241 A EP 98105241A EP 98105241 A EP98105241 A EP 98105241A EP 0867566 B1 EP0867566 B1 EP 0867566B1
Authority
EP
European Patent Office
Prior art keywords
wear pad
stabilizer leg
leg according
outer part
stabilizer
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
EP98105241A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0867566A3 (en
EP0867566A2 (en
Inventor
Michael Mckee
David John Brown
Roy William Allsopp
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
Publication of EP0867566A2 publication Critical patent/EP0867566A2/en
Publication of EP0867566A3 publication Critical patent/EP0867566A3/en
Application granted granted Critical
Publication of EP0867566B1 publication Critical patent/EP0867566B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/085—Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs

Definitions

  • This invention relates to a stabilizer leg for a vehicle and more particularly, but not exclusively, to stabilising frames in or for excavators of the kind comprising an excavator assembly adapted for mounting on the stabilising frame which is securable to the rear of a tractor or like vehicle wherein the excavator assembly comprises a boom pivotally mounted at its lower end for movement up and down in a vertical plane and carrying at its outer end a pivotally mounted dipper arm upon which is mounted an excavating tool such as a bucket, and wherein the boom is mounted also for traversing movement about a vertical axis so as to be capable of being swung from side-to-side of the centre line of the tractor, the frame having at each side an extensible leg member whereby, for example, when an excavator comprising such an excavator assembly, frame and tractor is operating upon uneven ground or soft ground or upon an inclination, the legs may be extended as required to ensure a firm support for the stabilising frame.
  • An object of the invention is to provide a new and improved stabilizer leg.
  • a further object of the invention is to provide a new and improved stabilising frame in or for an excavator of the kind above specified,
  • a stabilizer leg comprising an upper outer part having telescopically slidable therein a lower inner part having a ground engageable portion and a wear pad being adjustably engaged with one of said parts to permit of adjustment of clearance between the wear pad and an opposed surface of the other of said parts.
  • the wear pad may be adjustably engaged with the outer of said parts to permit of adjustment of clearance between the wear pad and the inner part.
  • the wear pad may be threadedly engaged with the outer part whereby rotation of the wear pad relative to the outer part causes relative movement between said wear pad and the outer part in a direction transverse to a direction in which said parts telescope.
  • Means may be provided to provide a frictional resistance to said relative threaded rotation.
  • the wear pad may have an externally threaded part in said threaded engagement with an internally threaded part of said outer part.
  • One of said threaded parts preferably the wear pad, may be provided with an insert for providing a frictional resistance to relative threaded rotation between the wear pad and said outer part.
  • the wear pad may be generally cylindrical, said cylindrical surface being provided with a thread to provide said externally threaded part.
  • the wear pad may be made of plastics material to provide said externally threaded part.
  • the plastics material may comprise nylon.
  • the nylon may be provided with a lubricant.
  • the wear pad may be provided with a socket to receive a tool whereby the wear pad may be rotated.
  • the socket may be a square or other non-circular section recess.
  • the outer part may be provided with a boss and the boss may be provided with said internal thread.
  • the outer part may be provided with a further wear pad on a side thereof opposite to said adjustable wear pad.
  • the further wear pad may be fixed relative to the outer part or alternatively may also be adjustable in the same or a different manner to that of the first mentioned adjustable wear pad.
  • two adjacent sides of the outer part may be provided with an adjustable wear pad and the two opposite sides of the outer part may be provided with a further wear pad which may be fixed or adjustable.
  • the provision of the wear pads ensures that the inner part telescopes relative to the outer part with a desired clearance between the inner part and the wear pads.
  • the desired clearance between the inner part and the wear pads may be maintained simply by rotating one or each of the wear pads, as necessary, by engagement of a suitable tool within the above mentioned recess to take up the desired wear.
  • the upper part of the leg may be adapted to be fixed relative to a vehicle.
  • Two stabiliser legs may be adapted to be provided on opposite sides of a vehicle.
  • a stabilising frame in or for an excavator of the kind specified wherein the frame has at each of two opposite sides a stabiliser leg according to the first aspect of the invention.
  • the stabilizer legs are inter-connected by cross rail means to provide the stabilising frame.
  • the cross rail means may comprise a pair of cross rails one disposed adjacent a lower part of each outer part and the other provided thereabove but spaced downwardly from a top end of the outer part.
  • the cross rail means may provide guide ways for side shifting movement of a king post assembly which may carry an excavator assembly.
  • a rear elevation of a stabilising frame of an excavator is illustrated generally at 10 and comprises a pair of upper, outer, housing parts 11 inter-connected by a lower cross rail 12 disposed adjacent a lower end 13 of each housing 11 and an upper cross rail 14 disposed above the rail 12 and downwardly from an upper end 15 of the housing 11.
  • the rails 12, 14 provide a guide means for a king post assembly 16 on which a conventional back-hoe type of excavator is mounted as best shown in Figure 5.
  • the back-hoe excavator is mounted by the stabilizing frame 10 on the rear of a excavator vehicle 1 and comprises a bucket 2 pivotally mounted for movement in a vertical plane on a dipper arm 3 which in turn is pivotally mounted, again for movement in a vertical plane, on a boom 4.
  • the inner end of the boom 4 is pivotally mounted, for movement in a horizontal and vertical plane, on the stabilising frame 9 by means of the king post 16.
  • Hydraulic rams 5 are provided to effect the various pivotal movements of the bucket and the dipper arm relative to the dipper aim and the boom respectively.
  • each housing part 11 is made as a U-shaped pressing 20 which is closed by a plate 21 welded across the open mouth thereof and extending longitudinally thereof.
  • a reinforcing bracket, also of U-shaped cross-section is welded around the housing adjacent its lower end as shown at 22 and a pair of bosses 23 are welded in apertures 24 provided in the housing part 20 and the reinforcing bracket 22 so as to provide a pair of wear pad housings.
  • the bosses 23 providing the wear pad housings have an internally threaded passage 25.
  • the housing part 20 is provided with an aperture 26 whilst the reinforcing bracket 22 is not provided with an aperture at this position.
  • a fixed wear pad of a suitable material in the present example a suitable self lubricated nylon, is shown at 27 and comprises a spigot part 28 received within the aperture 26 and an enlarged head part 29 having an inwardly facing surface 30 which is adapted to provide a wear surface for an inner, lower leg, part 31 of the stabilizer.
  • each boss 23 Threadedly received within each boss 23 is an adjustable wear pad 32 which has an externally threaded cylindrical surface 33 for threaded engagement with the internally threaded surface 25 of the bosses 23.
  • the adjustable wear pad is made of suitable material which may be a self lubricating nylon.
  • the adjustable wear pad has a socket 34 of suitable non-circular shape in the present example of square cross section, for receiving a suitable tool such as a standard socket set bar, whereby the adjustable wear pad may be rotated relative to the boss 23 and so as to move an operative wear surface 35 thereof, transversely of the direction of telescopic movement between the inner and outer leg parts, relative to an opposed surface of the inner leg part 31.
  • the adjustable wear pad is provided with a "stiff thread" facility whereby resistance to rotation is provided and in particular inadvertent rotation in service is resisted.
  • this is provided by means of a generally radially disposed plug 36 threadedly received in a recess 37 of cylindrical configuration.
  • the plug 36 is made of suitable synthetic plastics material, in this case nylon 6, and is preferably provided with a plane operative surface 38 and is dimensioned so as to be an interference fit with the internal thread 25 of the boss 23 thereby providing a resistance to relative rotation therebetween.
  • the or each adjustable wear pad 32 is rotated until the inner leg part 31 is clamped against the opposed fixed wear pad and then they are backed off an appropriate amount, in the present example 1 ⁇ 4 of a turn, the thread being of 3mm pitch.
  • an appropriate amount in the present example 1 ⁇ 4 of a turn, the thread being of 3mm pitch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Paper (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Legs For Furniture In General (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Pens And Brushes (AREA)
  • Earth Drilling (AREA)
  • Passenger Equipment (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Eyeglasses (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Pivots And Pivotal Connections (AREA)
EP98105241A 1997-03-27 1998-03-23 Stabilizer leg Expired - Lifetime EP0867566B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9706445.5A GB9706445D0 (en) 1997-03-27 1997-03-27 Stabilizer leg
GB9706445 1997-03-27

Publications (3)

Publication Number Publication Date
EP0867566A2 EP0867566A2 (en) 1998-09-30
EP0867566A3 EP0867566A3 (en) 1999-03-10
EP0867566B1 true EP0867566B1 (en) 2002-12-11

Family

ID=10810011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105241A Expired - Lifetime EP0867566B1 (en) 1997-03-27 1998-03-23 Stabilizer leg

Country Status (6)

Country Link
EP (1) EP0867566B1 (es)
AT (1) ATE229597T1 (es)
DE (1) DE69809990T2 (es)
DK (1) DK0867566T3 (es)
ES (1) ES2189024T3 (es)
GB (2) GB9706445D0 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8439566B2 (en) 2010-03-09 2013-05-14 Caterpillar Global Mining Equipment Llc Wear pad adjustment assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1311364B1 (it) * 1999-12-17 2002-03-12 New Holland Italia Spa Gamba stabilizzatrice per veicoli da lavoro.
US6757958B1 (en) * 2000-05-11 2004-07-06 Jlg Omniquip, Inc. Load handler with modular frame assembly
GB2375753B (en) * 2001-03-24 2004-11-17 Bamford Excavators Ltd Wear pad
CN101920915B (zh) * 2010-08-25 2012-05-23 江苏柳工机械有限公司 支腿间隙调整装置
EA034299B1 (ru) * 2014-10-24 2020-01-27 СиАйДжей ИНЖИНИРД ПТИ ЛТД Стрела в сборе (варианты) и узел износной накладки для использования со стрелой в сборе (варианты)
US10066363B1 (en) * 2017-07-13 2018-09-04 Cnh Industrial America Llc Wear pad system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB346589A (en) * 1930-05-01 1931-04-16 George Frederick Swinnerton Improved means for supporting uncoupled trailer vehicles and for like purposes
US3263837A (en) * 1965-02-15 1966-08-02 Massey Ferguson Inc Transversely adjustable boom mounting for earthworking apparatus
US4134236A (en) * 1976-11-26 1979-01-16 Clark Equipment Company Side shoe assembly for a crane boom
US4385704A (en) * 1980-08-14 1983-05-31 Kidde, Inc. Crane boom top plate lateral support
DE3224890C1 (de) * 1982-07-03 1983-12-29 Haacon Hebetechnik GmbH, 6982 Freudenberg Hub- bzw. Absetzvorrichtung fuer transportable Behaelter,z.B. Container,Wechselaufbauten o.dgl.
GB2134465A (en) * 1983-01-27 1984-08-15 James Drummond Gordon Tractor support apparatus
JPH08282973A (ja) * 1995-04-19 1996-10-29 Kobe Steel Ltd アウトリガ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8439566B2 (en) 2010-03-09 2013-05-14 Caterpillar Global Mining Equipment Llc Wear pad adjustment assembly

Also Published As

Publication number Publication date
DK0867566T3 (da) 2003-03-31
DE69809990T2 (de) 2003-05-28
ATE229597T1 (de) 2002-12-15
DE69809990D1 (de) 2003-01-23
GB9706445D0 (en) 1997-05-14
EP0867566A3 (en) 1999-03-10
EP0867566A2 (en) 1998-09-30
ES2189024T3 (es) 2003-07-01
GB2327216B (en) 2001-04-04
GB9805984D0 (en) 1998-05-20
GB2327216A (en) 1999-01-20

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