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WO2009073926A1 - Systèmes améliorés d'attelage et de fixation pour chargeuses frontales - Google Patents

Systèmes améliorés d'attelage et de fixation pour chargeuses frontales Download PDF

Info

Publication number
WO2009073926A1
WO2009073926A1 PCT/AU2008/001829 AU2008001829W WO2009073926A1 WO 2009073926 A1 WO2009073926 A1 WO 2009073926A1 AU 2008001829 W AU2008001829 W AU 2008001829W WO 2009073926 A1 WO2009073926 A1 WO 2009073926A1
Authority
WO
WIPO (PCT)
Prior art keywords
loader
arm
boom
boom arm
pin
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.)
Ceased
Application number
PCT/AU2008/001829
Other languages
English (en)
Inventor
Daniel Webb
Craig Healey
Collin O'shaughnessy
John Healey
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.)
Challenge Implements Holdings Pty Ltd
Original Assignee
Challenge Implements Holdings Pty 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
Priority claimed from AU2007906741A external-priority patent/AU2007906741A0/en
Application filed by Challenge Implements Holdings Pty Ltd filed Critical Challenge Implements Holdings Pty Ltd
Priority to AU2008336263A priority Critical patent/AU2008336263A1/en
Priority to NZ586004A priority patent/NZ586004A/en
Publication of WO2009073926A1 publication Critical patent/WO2009073926A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E02F3/627—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor
    • E02F3/6273—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor using legs to support the beams or arms on the ground during the connecting process
    • 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

Definitions

  • the present invention relates to front end loader boom arrangements and in particular to level lift systems for these, and to loader attachment systems in particular those which are utilized with front end loaders- Background of the invention
  • Front end loaders also need to be cost effective to be attractive to potential owners and as such cannot utilize expensive front end loader attachment systems. However, there has been a long felt need to improve the effectiveness and yet keep the manufactured cost as low as possible.
  • the present invention provides a boom arm for a loader constructed from an upper arm and a lower arm, the upper arm and the lower arm (being of substantially the same overall shape and) being of cross sections allowing one to be substantially received within the other.
  • the arm can be of a cross section to receive the lower arm.
  • the lower arm can be of a cross section to receive the upper arm.
  • the upper or lower arm can be of a U- shape, inverted U-shape, L-shape, Inverted
  • the lower arm can include a gusset between an upper and lower portion thereof.
  • the boom arm can include on a rearward face thereof a parking stand.
  • a ground engaging terminus of said parking stand is located, at least during some of the time that said parking stand is retracted, within the confines of side plates or panels from which said upper boom arm and or said lower boom arm is or are constructed.
  • the upper and lower boom arms can be pivoted at respectively upper and lower locations on a top post or a pin plate.
  • the upper and lower boom arms can be pivoted respectively to upper and lower locations of a link member.
  • the boom arms can be pivotally attached to the link member by means of apertured bosses which provide a pivot location which is located laterally away from the general line of extension of the boom arms.
  • the present invention also provides a front end loader having at least two boom arms as described above.
  • the upper boom arms can be held spaced apart by a cross member.
  • the cross member can be located below a bend in the boom arms.
  • the cross member can be attached to the upper boom arms by means of a saddle or saddles which is, or are, adapted to be welded to an outer surface of the upper boom arms.
  • the lower boom arms can be held in a spaced apart relationship by means of a cross member.
  • a crowd cylinder can be provided between an implement or an implement mount and the cross bar on the upper boom arm.
  • the implement mount or an implement can be pivotally attached to the boom arms at the same pivot point that the lower boom arm is pivotally attached to the link.
  • the present invention also provides a loader of the type having a boom arm pivotally attached to a mounting plate and having at least one lift cylinder to rotate the boom arm relative to the mounting plate characterised in that the lifting cylinder is pivotally mounted to the mounting plate via an elongated aperture in the mounting plate.
  • the elongated aperture can have a generally horizontal portion.
  • the aperture can include a generally inclined portion.
  • the inclined portion can have an upper most rearward portion and a lower most forward portion
  • the lift cylinder can be mounted at its rearward end via a pin to the elongated aperture.
  • the pin can have associated with it at least one bracket to secure the pin against movement relative to the mounting plate.
  • the mounting plate can include two apertures to secure the pin in one of two positions relative to the mounting plate.
  • the loader can include a level lift or constant angle lift member for level or constant angle lifting, with each of the boom arm and the level lift or constant angle lift member being pivotally attached to said mounting plate.
  • the level lift or constant angle lift member can be a link member which is located internally or externally, or a combination thereof, with respect to said boom arm, or the level lift or constant angle lift member is a lower boom arm.
  • the mounting plate preferably acts as a strap.
  • the present invention further provides a loader attachment assembly including a loader as described in the above paragraphs and a bottom post to receive the loader, the bottom post including at least one cradle to receive pins associated with said boom arm or said level lift or constant angle lift member and a profiled open slot to receive a portion of the pin, the open slot including a generally horizontal landing.
  • the open slot can also include an inclined portion.
  • the inclined portion can have an upper rearward most end and a lower forward most end.
  • Another aperture can be located in the vicinity of the terminus of the open slot so as to receive a bolt when the pin associated with the lift cylinder is moved to a locked position.
  • the loader can be secured to the bottom post by activation of the lift cylinder from a retracted condition to a practically extended condition, and the pin being secured relative to the mounting plate or the bottom post.
  • the above described loader or loader assembly can be such that the pin can be locked in the locked condition by means of a spring biased locking pin.
  • the spring biased locking pin preferably automatically moves into a locking hole when aligned therewith.
  • the above described loader or loader assembly can be such that the said boom arm or said level lift or constant angle lift member are pivotally mounted to the mounting plate by pins which include means to orient the pins and to maintain the orientation relative to the bottom post, and to prevent relative rotation therebetween.
  • This means can include a casting to engage a cradle to receive and the pin.
  • Figure 1 is a rear perspective view of a front end loader
  • Figure 2 is a side view of the front end loader of Figure 1 ;
  • Figure 3 is a part cut-away side view of the front end loader of Figure 1 ;
  • Figure 4 is a side section or cut-away view of the front end loader of Figure 1 extended to maximum height after a level lift;
  • Figure 5 is a part cut away view of the illustration of Figure 4.
  • Figure 6 is an exploded front perspective view of the front end loader Figure 1 ;
  • Figure 7 is a rear exploded perspective view of the front end loader of Figure 1 ;
  • Figure 8 is a front perspective view of the boom arm and bucket arrangement
  • Figure 9 shows the front end loader of Figure 1 on the parking stand.
  • Figure 10 is a close up view of the lower pivot points of the boom arms being joined to a link.
  • Figure 11 illustrates a perspective view of a loader system including a front end loader and bottom post;
  • Figure 12 is an exploded perspective view of the system of Figure 11 ;
  • Figure 13 illustrates a rear perspective view of a portion of the system of Figure
  • Figure 14 illustrates a view similar to Figure 13 with one mounting plate of each boom arm removed;
  • Figure 15 illustrates a forward perspective view of the rear mounting portion of the apparatus of Figure 11 and the bottom post;
  • Figure 16 illustrates a view similar to that of Figure 15 with one mounting plate removed;
  • Figure 17 illustrates a side view of the apparatus of Figure 16 with the loader being shown immediately prior to engaging the bottom post;
  • Figure 18 illustrates a view similar to Figure 17 with the pins shown in their cradles or saddles with the lower pin in an unlocked condition.
  • Figure 19 illustrates a loader and bottom post of Figure 11 in side view in an unlocked condition and supported by a parking stand;
  • Figure 20 illustrates a view similar to Figure 19 with the loader in a locked condition
  • Figure 21 illustrates a lower perspective view of alternative arrangement to prevent rotation of mounting pins
  • Figure 22 illustrates an upper perspective view of the apparatus of Figure 21 ;
  • Figure 23 illustrates a slide perspective view of the apparatus of Figure 21.
  • FIG. 1 to 10 Illustrated in Figures 1 to 10 is a front end loader 10 which has a vehicle mounting pin plate, (which could also be described as pin plates or a top post) 12 at its rear end to which is pivotally connected and an upper chevron shaped boom arm 14 and a lower chevron shaped boom arm 16, by upper and lower respective pivots. At their lower ends the upper and lower boom arms 14 and 16 are pivotally connected by a link member 28.
  • the boom arms, 14 and 16 as best illustrated in Figure 6 and 7, have laterally extending bosses 34 and 36 which have apertures therethrough to receive pins to produce the pivotal connection.
  • the lower boom arm 16 is rotated relative to the pin plates 12 by means of a lift cylinder 18 which is also pivotally connected to the pin plates 12 at a location which is below the lower pivot point of the lower arm 16.
  • a lift cylinder 18 which is also pivotally connected to the pin plates 12 at a location which is below the lower pivot point of the lower arm 16.
  • On the upper boom arm 14 at a forward end thereof is positioned a cross bar 20 which holds adjacent boom arms 14 of the front end loader 10 in a spaced apart relationship.
  • the cross bar 20 is attached via left and right saddles 22 which sit over the outer surface of the upper boom arms 14 and allows them to be welded thereto.
  • This arrangement allows the upper boom arm 14 to have a generally inverted U- shape cross section along its entire length, and this in turn allows the lower boom arm 16 to nest and move therein.
  • the lower boom arm 16 has a generally U-shape cross section along most of its length.
  • the lower boom arm 16 includes side plates or gussets 40 between its upper and lower sections which provides apertures or bores therethrough for pivotal connection by a pin to the distal end of the lift cylinder 18.
  • the lower end of the lower boom arm 16 includes a welded cross bar 24 so as to maintain the distal ends thereof in a spaced apart relationship.
  • the cross bar 24 is preferred but it will be understood that such a cross bar may well be able to be dispensed with, as it does provide a level of redundancy by virtue of the presence of the cross bar 20 on the upper boom arm 14. Notwithstanding this, an advantage of the presence of the cross bar 24 is that the rigidity of the front end loader 10 will not have to rely on the pivoted connections at the lower extremity of the boom arms 14 and 16.
  • the upper boom arm 14 terminates in a laterally (relative to the line of extension of the boom arm 14 in this vicinity) extending boss 36 having an aperture through it so as to receive therein a pin so as to allow the link 28 to be connected via a set of upper holes therein.
  • the lower boom arm 16 terminates in a laterally (relative to the line of extension of the boom arm 16 in this vicinity) extending boss 34 having an aperture through it so as to be aligned with the lower apertures in the link 28 so that the arm 16 and link 28 can be pinned together.
  • the pin plates 12 (with spaced pin connection apertures for the upper and lower boom arms 14 and 16), the lower boom arm 16, link 28 (with its spaced connection aperture for the upper and lower boom arms 14 and 16), and upper boom arm 14, when assembled together by four respective pins, form a parallel linkage.
  • This enables the bucket 31 or alternate implement or an implement mount to be utilized, to produce a level lifting arrangement, whereby when the lift cylinder 18 is extended, the front end loader 10 will level lift the bucket 31 from the position illustrated in Figures 2 and 3 to the position illustrated in Figures 4 and 5.
  • a crowd cylinder 32 is pivotally connected to the cross bar 20 and to the bucket 31 in via a bracket 42.
  • the bucket 31 will maintain this orientation relative to the vehicle on which the loader 10 is mounted. It must be pointed out that the crowd cylinder 32 does not need to change its extension state for the bucket 31 to be lifted in a parallel fashion.
  • a parking stand 26 which is illustrated in the fully extended condition in Figure 9.
  • the parking stand 26 When the parking stand 26 is deployed, by being moved from its parked or retracted condition parallel to the lower boom arm 16, to the extended condition illustrated in Figure 9, then together with the weight of a bucket 31 or other implement this combination will place the front end loader 10 in an equilibrium condition, allowing it to be disconnected from the vehicle or tractor or re-connected thereto.
  • the gusset plates 40 at the bend in the lower arm 16, provides a "housing" into which the ground engaging end of the parking stand 26 can sit when in the fully retracted condition, as is illustrated in Figure 1. Additionally or as an alternative, the ground engaging end of the parking stand 26 can hide or sit within the surrounds of the side plates or panels and or gussets of upper boom arm 14. This helps to protect and confine the ground engaging end of the parking stand 26.
  • the nesting capability being the ability of one to be substantially received within the other, of the upper and lower boom arms 14 and 16 can be achieved by several means.
  • the upper boom arm can receive the lower boom arm as is described above, or the lower boom arm can receive the upper boom arm.
  • This can be achieved by one of the upper or lower arm being of a U- shape, inverted U-shape, L-shape, or inverted L-shape in cross section.
  • Another advantage of the above embodiment is the ability to have a mechanical level lift loader with the use of a single crowd cylinder, therefore allowing less hoses and fittings to be used and procuring a loader that is lighter than a traditional mechanical level lift loader.
  • FIG. 11 and 12 Illustrated in Figures 11 and 12 is a front end loader 100 the construction of which is described above with respect to the loader 10 of Figures 1 to 10.
  • the loader 100 has some features which are different to the loader 10, and these will be described below.
  • FIG. 11 Illustrated in Figure 11 are two bottom posts 120 on which the bifurcated rear end of the front loader 100 will be mounted.
  • the bottom posts 120 are mounted by any appropriate means to a tractor or other vehicle in an appropriate spaced relationship with each other so as to receive the bifurcated rear end of the front end loader 100.
  • the post 120 will be described in more detail later.
  • Each side of the rear of the front end loader 100 has two mounting straps or mounting plates 140 which receive a pin 160 for pivotally mounting an upper boom arm 101 and a pin 180 for pivotally mounting the lower boom arm 102.
  • a closed mounting slot 200 is at the lower end of the mounting plates 140 to receive a pin 220 which pivotally attaches a rear collar 240 of lift cylinder 260, as shown in the illustration of Figure 11.
  • the pin 220 has two eccentric or egg-shaped flanges 500 attached to it. In a hole
  • the bottom post 120 has upper cradles 320 and 340 to receive and support the inboard and outboard ends respectively of the pins 160.
  • the closed slot 200 is of a chevron or boomerang shape and has a forward portion 201 which is generally horizontal. It will also be seen that the rearward portion 202 is inclined at an angle to the horizontal and has its rearward end uppermost whilst its forward end is at the same level as the forward portion 201.
  • the holes 300 and 301 respectively allow the pin 280, in this case a bolt 280, to be inserted.
  • the holes 300 will keep the pin 220 in the "unlocked" end of the apertures 200, namely the forward portion 201.
  • the holes 301 together with holes 400 will hold the pin 220 in the locked condition as illustrated in Figure 20
  • the bottom post 120 also includes an open slot 420 which in the forward portion has a generally horizontal landing 440 which coincides (when loader 100 and post 120 are assembled together) in alignment with the forward portion 201 of closed slot 200 and a rearwardly upwardly directed inclined portion 460 which corresponds with the inclined rearward portion 202 of aperture 200 .
  • the lift cylinder 260 can then be actuated so as to push the pin 220 to the left of the page of Figure 18 until such time as the pin 220 has reached the rearward most ends of the inclined slots 460 on the bottom post 120 and the inclined rearward portion 202 on mounting plates 140.
  • the egg shaped flanges 500 can be rotated so that the holes therethrough can be aligned with the holes 400 and 301, to thus allow bolt 280 to pass through them. This secures the pin 220 into the position as illustrated in Figure 20 thus locking the loader 100 to the bottom post 120. [091] In this condition the mounting plates 140 act as a tension strap preventing the pin
  • the pins 160 and 180 preferably include flat faces 161 and 181 respectively. As the mounting plates 140 have apertures through them of the same shape this will prevent the pins 160 and 180 from rotating relative to the mounting plates 140.
  • each pin 220 With respect to the egg shaped flanges 500 on each pin 220, one of these is welded to the pin 220 so that once the bolt 280 passes through apertures 301 and apertures 300 the pin 220 is not able to rotate relative to the mounting plates 140.
  • a handle can be provided on the flanges 500, to enable the operator to rotate them as desired so as to align the respective bolt holes.
  • FIG. 21 to 23 Illustrated in Figures 21 to 23 is an alternative mechanism to prevent the relative rotation of the pins 160 and 180 relative to the saddles 320, 340 and 360, 380.
  • This is done by means of castings 700 and 720, which as can be seen from Figure 22 and Figure 23 have a flattened aperture 730 which matches the shape of the pins 160 and 180.
  • the castings 700 and 720 also have flanges 740 and 760 on either side of the apertures 730 but in the case of casting 700 the angle between the flanges 740 and 760 is greater than the angle between the flanges 740 and 760 on the casting 720.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)

Abstract

Bras articulé (10) pour une chargeuse, constitué d'un bras supérieur (14) et d'un bras inférieur (16), ledit bras supérieur (14) et ledit bras inférieur (16) ayant des coupes transversales qui permettent à l'un d'être sensiblement reçu à l'intérieur de l'autre. Chargeuse (100) du type ayant un bras articulé (101/102) fixé de manière pivotante à une plaque de montage (140) et comprenant au moins un vérin de levage (260) pour faire pivoter ledit bras articulé (101/102) par rapport à ladite plaque de montage (140), caractérisée en ce que ledit vérin de levage (260) est monté de manière pivotante sur ladite plaque de montage (140) par l'intermédiaire d'une ouverture allongée (200) prévue dans ladite plaque de montage (140).
PCT/AU2008/001829 2007-12-12 2008-12-11 Systèmes améliorés d'attelage et de fixation pour chargeuses frontales Ceased WO2009073926A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2008336263A AU2008336263A1 (en) 2007-12-12 2008-12-11 Improved linkage and attachment systems for front end loaders
NZ586004A NZ586004A (en) 2007-12-12 2008-12-11 Linkage and attachment systems for front end loaders with one arm receivable within the other

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU2007906741A AU2007906741A0 (en) 2007-12-12 Parallel Link Systems
AU2007906741 2007-12-12
AU2007906942 2007-12-18
AU2007906942A AU2007906942A0 (en) 2007-12-18 Loader Attachment Systems

Publications (1)

Publication Number Publication Date
WO2009073926A1 true WO2009073926A1 (fr) 2009-06-18

Family

ID=40755183

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/001829 Ceased WO2009073926A1 (fr) 2007-12-12 2008-12-11 Systèmes améliorés d'attelage et de fixation pour chargeuses frontales

Country Status (3)

Country Link
AU (1) AU2008336263A1 (fr)
NZ (1) NZ586004A (fr)
WO (1) WO2009073926A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016084617A (ja) * 2014-10-24 2016-05-19 ヤンマー株式会社 作業車両
WO2023139893A1 (fr) * 2022-01-19 2023-07-27 株式会社クボタ Mécanisme de maintien d'attitude de chargeur frontal, et chargeur frontal

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275984A (en) * 1979-03-19 1981-06-30 Farmhand, Inc. Parking stand
GB2133379A (en) * 1983-01-11 1984-07-25 Sanyo Kiki Kk Device for coupling and uncoupling front loader to agricultural tractor
US4522554A (en) * 1982-11-24 1985-06-11 David Brown Tractors Ltd. Tractor front loader
US4802814A (en) * 1986-04-23 1989-02-07 Kubota Ltd. Device for attaching front loader to tractor
JPH0813532A (ja) * 1994-06-29 1996-01-16 Yutani Heavy Ind Ltd テレスコピックアーム
JPH08218411A (ja) * 1995-02-09 1996-08-27 Komatsu Ltd 作業車両の旋回縮小装置
JPH08311914A (ja) * 1995-05-12 1996-11-26 Yutani Heavy Ind Ltd 建設機械のテレスコピックアーム装置
WO2006036105A1 (fr) * 2004-09-29 2006-04-06 Ålö AB Chargeur comportant des sections de bras et des jambes paralleles presentant une section transversale ouverte
CA2512971A1 (fr) * 2005-07-22 2007-01-22 Frey Industries Limited Bras de fleche d'alimentation

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275984A (en) * 1979-03-19 1981-06-30 Farmhand, Inc. Parking stand
US4522554A (en) * 1982-11-24 1985-06-11 David Brown Tractors Ltd. Tractor front loader
GB2133379A (en) * 1983-01-11 1984-07-25 Sanyo Kiki Kk Device for coupling and uncoupling front loader to agricultural tractor
US4802814A (en) * 1986-04-23 1989-02-07 Kubota Ltd. Device for attaching front loader to tractor
JPH0813532A (ja) * 1994-06-29 1996-01-16 Yutani Heavy Ind Ltd テレスコピックアーム
JPH08218411A (ja) * 1995-02-09 1996-08-27 Komatsu Ltd 作業車両の旋回縮小装置
JPH08311914A (ja) * 1995-05-12 1996-11-26 Yutani Heavy Ind Ltd 建設機械のテレスコピックアーム装置
WO2006036105A1 (fr) * 2004-09-29 2006-04-06 Ålö AB Chargeur comportant des sections de bras et des jambes paralleles presentant une section transversale ouverte
CA2512971A1 (fr) * 2005-07-22 2007-01-22 Frey Industries Limited Bras de fleche d'alimentation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016084617A (ja) * 2014-10-24 2016-05-19 ヤンマー株式会社 作業車両
WO2023139893A1 (fr) * 2022-01-19 2023-07-27 株式会社クボタ Mécanisme de maintien d'attitude de chargeur frontal, et chargeur frontal

Also Published As

Publication number Publication date
AU2008336263A1 (en) 2009-06-18
NZ586004A (en) 2012-01-12

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