EP2112277A2 - Erdbaumaschine und Ladeschaufel für eine solche Erdbaumaschine - Google Patents

Erdbaumaschine und Ladeschaufel für eine solche Erdbaumaschine Download PDF

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Publication number
EP2112277A2
EP2112277A2 EP09305318A EP09305318A EP2112277A2 EP 2112277 A2 EP2112277 A2 EP 2112277A2 EP 09305318 A EP09305318 A EP 09305318A EP 09305318 A EP09305318 A EP 09305318A EP 2112277 A2 EP2112277 A2 EP 2112277A2
Authority
EP
European Patent Office
Prior art keywords
bucket
articulated arm
support device
earthmoving machine
loading
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
EP09305318A
Other languages
English (en)
French (fr)
Other versions
EP2112277B1 (de
EP2112277A3 (de
Inventor
Maxime Boni
Henri Marchetta
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.)
Groupe Mecalac SAS
Original Assignee
Groupe Mecalac SAS
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 Groupe Mecalac SAS filed Critical Groupe Mecalac SAS
Publication of EP2112277A2 publication Critical patent/EP2112277A2/de
Publication of EP2112277A3 publication Critical patent/EP2112277A3/de
Application granted granted Critical
Publication of EP2112277B1 publication Critical patent/EP2112277B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02F3/28—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
    • E02F3/307—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 the boom and the dipper-arm being connected so as to permit relative movement in more than one plane
    • 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
    • E02F3/301—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 with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • 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
    • E02F3/308—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 working outwardly
    • 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
    • E02F3/352—Buckets movable along a fixed guide
    • 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
    • E02F3/961—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements with several digging elements or tools mounted on one machine
    • 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

  • the present invention relates to the field of public works. More specifically, it relates to an earthmoving machine such as a loader-excavator, as well as a loading bucket for such an earthmoving machine.
  • a conventional loader comprises a self-propelled frame and a front loading bucket, supported by one or more rigid arms and articulated to this self-propelled frame.
  • An excavator is used to dig into the ground. It conventionally comprises an articulated arm for maneuvering a toothed tool designed to be driven into the ground and dismember it.
  • An excavator can be designed so that it can also be used as a loader. It is then a loader-excavator whose articulated arm can be equipped, with the choice, of a digging tool or a bucket of loading. Such a bucket is loaded by being pushed on the ground, forwards, in the material to be picked up. The thrust then exerted on the loading bucket to advance it results from a displacement of the loader-excavator itself and it is transmitted by the articulated arm which, therefore, can be subjected to multiple efforts. In particular, this articulated arm can be biased when the pushed bucket encounters a resistance near only one of its two lateral ends.
  • the articulated arm While it can therefore be subjected to very high value twists, the articulated arm must have a reasonable mass, especially in order to be able to easily maneuver a digging tool.
  • the problem resulting from the fact that the articulated arm can be subjected to high torsion is even more acute when the articulated arm is offset laterally, insofar as this results in an increase in the lever arm of the left or right side of the bucket. loading, relative to the hinge area of this bucket on the articulated arm.
  • the invention is at least intended to improve the ability of an earthmoving machine to exert a thrust on a loading bucket fitted to this machine.
  • an earthmover comprising a chassis carried by a rolling assembly, as well as an articulated arm for supporting and operating a tool such as a loading bucket.
  • This earthmoving machine also comprises at least one support device for a loading bucket in a low pickup position. Through this support device, the chassis is able to exert a thrust on the loading bucket in a direction of movement of the earthmover, when the articulated arm holds the bucket in the low position of pickup.
  • an earthmoving machine can be designed so as to be able to exert many strong thrusts on a bucket, without that ensues a malfunction or premature wear of the support arm of this bucket.
  • the loading bucket is a tool that can be mounted on the articulated arm via a tool holder and that is part of a work head articulated to this arm. It will be noted that the invention has the advantage of being compatible with proven and effective architectures for coupling the working head to the actuating actuator of this working head around its tilting axis.
  • this machine comprises a second support device through which the chassis can exert a thrust on a loading bucket, in said direction of movement, when the articulated arm holds this bucket in the low position of pickup, the one and the other support device being offset horizontally from one another.
  • the one and the other support device are positioned in such a way that, when it holds the bucket in the lower pickup position, the articulated arm is located between these two support devices so that be that little or no stress in torsion when loading the bucket by moving the bucket on the ground.
  • the earth-moving machine is more precisely a loader-excavator which comprises a reversible coupling tool holder of a tool at a distal end of said articulated arm, that is to say at the furthest end of the chassis, and of which this articulated arm comprises a succession of several tilting segments in substantially vertical planes.
  • the tilting segments of the articulated arm comprise a distal segment and several other tilting segments, each of which is movable between first and second end-of-travel positions such that, when each of these several other tilting segments is immobilized in its first end position stroke, the low bucket loading position is reached by only tilting the distal segment around a proximal end of this distal segment.
  • the machine comprises a joint between a distal end of the articulated arm and the bucket carried by this articulated arm, the support device defining a substantially horizontal alignment axis with which the axis of said articulation substantially coincides, when the articulated arm holds the bucket in said lower pickup position, and around which the bucket tilts while resting on the support device when the axis of the joint and the alignment axis coincide.
  • the support device comprises a bearing surface of the bucket in its low collector position, this bearing surface having a concavity which has a constant radius of curvature and centered on said alignment axis.
  • the support device comprises a guide slot pierced in the bearing surface.
  • the support device comprises a scraping transverse blade movable between a low scraping position and a high position in which the bucket can come into abutment against the support device by placing itself in its low collection position, said surface bearing at a front face of the transverse scraping blade.
  • the support device comprises a support shoe and a hinge whose axis of rotation forms said alignment axis and through which the shoe is hinged so as to tilt about this axis of rotation.
  • said shoe is constituted by the foot of a stabilizer and is movable between a low support position of a portion of the earthmover and a high position in which the bucket can come into abutment against this shoe by placing itself in its low pickup position.
  • the earthmoving machine comprises a loading bucket that carries said articulated arm, this articulated arm being able to bring the bucket into a position where the bucket is resting on the support device and which is said low position pickup.
  • the invention also relates to a loading bucket for a earthmoving machine.
  • This bucket comprises at least one pusher for receiving a thrust from the rear and transmission of this thrust generally in a direction of movement corresponding to the advance of the bucket forward for a pickup.
  • the pusher comprises a rear rolling device on a bearing surface of the earthmoving machine.
  • the rear rolling device comprises two rollers which have respective substantially horizontal axes of rotation and which are angularly offset from one another about a substantially horizontal axis of tilting of the bucket.
  • This excavator-loader 1 comprises a chassis 2 supported by four driving wheels 3.
  • This chassis 2 is equipped with a mobile turret 4, which is mounted so as to be pivotable about a vertical axis and which carries a driving cabin 5 and an articulated arm ⁇ 6 for supporting and actuating a tool.
  • the articulated arm 6 comprises three tilting segments in substantially vertical planes, that is to say around substantially horizontal axes. These three segments are mounted following each other by being articulated between them. The first of these is referenced 7 and is classically called the arrow. It is connected to the turret 4 by a hinge 8, so as to tilt about a substantially horizontal axis X 1 -X ' 1 .
  • the other two segments of the articulated arm 6 are the counter-arrow, referenced 9, and the arm, referenced 10.
  • the counter-arrow 9 is connected to the arrow 7 by a hinge 11, so as to be able to tilt relative to the arrow 7, about a substantially horizontal axis X 2 -X ' 2 .
  • the counter-boom 9 carries the arm 10, which is connected to it by a hinge 12 so as to be able to tilt about an axis X 3 -X ' 3 substantially horizontal and which is the distal segment of the articulated arm 6.
  • the distal end of the arm 10 is provided with a tool holder 14, which is articulated to it by means of a hinge 15 and on which can be mounted reversibly several removable tools of different types.
  • the arm 10 carries a cylinder 13 for operating the tool holder 14 around the substantially horizontal axis X 4 -X ' 4 of the articulation 15.
  • the coupling device of the tool holder 14 to the cylinder 13 comprises two links articulated to one another, namely a first rod articulated to the arm 10 and a second link articulated to the tool holder 14.
  • these two links, a portion of the arm 10 and at least a portion of the tool holder 14 together form a deformable parallelogram on which the cylinder 13 acts to manipulate the tool holder 14 and, more generally, the working head that together form this tool holder and a tool equipping it.
  • the tool held by the tool holder 14 is a loading bucket 16 horizontally elongated. Its back, facing back, carries two left and right rear pushers 17, which are laterally offset from one another and which project in a direction inclined towards the rear. The pushers 17 protrude towards the rear of the back of the bucket 16.
  • the excavator-loader 1 further comprises two left and right stabilizers 18, each of which is articulated to the frame 2 so that it can be operated by a jack 19 between two positions.
  • One of these two positions is that of Figures 1 to 3 , on which each stabilizer 18 forms a support device for the bucket 16.
  • these stabilizers 18 are directed towards the ground, in a manner known per se, so as to be able to bear on this ground.
  • Each stabilizer 18 comprises a leg 20 and a pivoting shoe 21, which is articulated at the distal end of this leg by means of a hinge 22 and which more precisely forms a foot of the stabilizer 18.
  • a tool other than the loading bucket 16 may be mounted on the tool holder 14.
  • it may be a digging bucket, narrower than the bucket 16 and mounted so that its back is generally rotated to the top.
  • the articulated arm 6 performs complex movements during which each of its segments 7, 9 and 10 tilts around its proximal end.
  • the loader-excavator 1 When its articulated arm 6 is provided with the loading bucket 7, the loader-excavator 1 is intended to function as a loader.
  • the joints 8 and 11 are fixed, since only the arm 10 is maneuvered.
  • the arrow 7 and the counter-arrow 9 form a fixed subset.
  • the arrow 7 is then immobilized in one of its two extreme positions or end positions, in which she is in abutment. It is the same with the counter-arrow 9.
  • the configuration of the fixed subassembly of the articulated arm 6 is easily reached by placing the arrow 7 and the counter-arrow 9 in abutment .
  • the arm 10 can move the loading bucket 16 between an upper discharge position and a lower pickup position, which is that of the Figures 1 to 3 and in which the pushers 17 are supported on the lower faces of the shoes 21 as long as the latter are in their high position.
  • the loader-excavator 1 When the loader-excavator 1 is in its configuration of Figures 1 to 3 its bucket 16 can be filled by scraping on the ground. To do this, the loader-excavator 1 is moved forward in the direction of advance symbolized by the arrow A, so that the bucket 6 is driven forwards, on the ground, in the material to load. During this, the chassis 2 transmits its movement to the bucket 16 not only via the articulated arm 6 . Indeed, it also exerts a thrust via the stabilizers 18, which then form support devices for the bucket 16. The pushers 17 receive this thrust and transmit it to the back of the bucket 16.
  • the articulated arm 6 is not stressed during the pickup phase. In particular, it is not stressed in torsion, even if the cup 16 encounters resistance in the vicinity of one of its two lateral ends.
  • the bucket 16 When its filling is completed, the bucket 16 is lifted by the arm 10 which, to do this, tilts up in the direction indicated by the arrow B 1 , while the arrow 7 and the counter-arrow 9 remain immobile relative at the turret 4.
  • FIG. 4 On the figure 4 is shown a loader-excavator 101 according to a second embodiment of the invention.
  • this excavator-loader 101 is only described as distinguishing it from the excavator-loader 1.
  • a reference used hereinafter to refer to a similar or equivalent portion of the loader-excavator 101 a referenced part of the loader-excavator 1 is built by increasing by 100 the reference designating this part in the loader-excavator 1.
  • the references of the articulated arm 106, the arrow 107, the hinge 108, the counter-boom 109, the arm 110, the joints 111, 112 and 115 of the excavator-loader 101 are obtained in particular the references of the articulated arm 106, the arrow 107, the hinge 108, the counter-boom 109, the arm 110, the joints 111, 112 and 115 of the excavator-loader 101.
  • the frame 102 of the excavator-loader 101 is supported by a roller assembly which includes two side tracks 103 instead of the four wheels 3.
  • This frame 102 is not provided with a stabilizer. However, it is equipped with a scraping assembly which comprises a front blade 150 carried by a tilting support 151.
  • This support 151 is articulated to the frame 102 so that the blade 150 can be operated by a cylinder 119 between a low position of scraping and a high position which is that of Figures 4 to 6 .
  • the front face 152 of the blade 150 forms a transversely elongate concavity. At this concavity, the front face 152 carries two plates 153, each of which is pierced with a generally vertical guide slot 154.
  • each pusher 117 is provided with a rolling device which consists of two rollers 155 angularly offset from one another about the axis.
  • X 4 -X ' 4 tilting bucket 116 an angle noted ⁇ to the figure 6 .
  • the front face of each plate 153 forms a running surface 156 for a pair of rollers 155, each of which has a substantially horizontal axis of rotation X 6 -X ' 6 .
  • the running surfaces 156 form a concavity facing forward.
  • the rolling surfaces 156 are cylindrical and centered on an alignment axis X 5 -X ' 5 with which the axis X 4 -X' 4 substantially coincides when the bucket 116 is in its low pickup position. Thanks to this, this bucket 116 can tilt around its pivot axis X 4 -X ' 4 while remaining in abutment against the plates 153, which is apparent from a comparison of figures 5 and 6 .
  • the rollers 155 roll on the surfaces 156 being guided by the cooperation of the longitudinal edges of the slots 154 with peripheral ribs 157, one team each roller 155.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shovels (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Harvester Elements (AREA)
EP09305318.9A 2008-04-21 2009-04-14 Erdbaumaschine und Ladeschaufel für eine solche Erdbaumaschine Active EP2112277B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0852684A FR2930267B1 (fr) 2008-04-21 2008-04-21 Engin de terrassement et godet de chargement pour un tel engin de terrassement

Publications (3)

Publication Number Publication Date
EP2112277A2 true EP2112277A2 (de) 2009-10-28
EP2112277A3 EP2112277A3 (de) 2014-04-30
EP2112277B1 EP2112277B1 (de) 2016-09-07

Family

ID=39816722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09305318.9A Active EP2112277B1 (de) 2008-04-21 2009-04-14 Erdbaumaschine und Ladeschaufel für eine solche Erdbaumaschine

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EP (1) EP2112277B1 (de)
FR (1) FR2930267B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014000027A1 (de) 2014-01-04 2014-10-30 Johannes Burde Teleskopsystem für die Integration in Monoblock- und Verstellausleger für das Verfahren des Stiel- und Hauptlagers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119625A5 (de) 1970-12-23 1972-08-04 Sogl Rupert

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA669368A (en) * 1963-08-27 E. Metailler Roger Power shovel with jack-controlled bucket inclination
US2502681A (en) * 1945-03-17 1950-04-04 Unit Crane & Shovel Corp Material handling apparatus
US2548084A (en) * 1947-09-19 1951-04-10 Eddie B Wagner Scoop-shovel vehicle
US3027662A (en) * 1958-07-25 1962-04-03 Jr Ernest R Cunningham Combination motor grader and bulldozer
US4085854A (en) * 1975-10-03 1978-04-25 Marion Power Shovel Co., Inc. Pitch stop assembly for power shovels
US4464093A (en) * 1978-10-06 1984-08-07 Dresser Industries, Inc. Power shovel having improed hoist system
DE10252833B3 (de) * 2002-11-13 2004-07-15 Bauer Spezialtiefbau Gmbh Fräsvorrichtung und Verfahren zur Herstellung eines Schlitzes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119625A5 (de) 1970-12-23 1972-08-04 Sogl Rupert

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014000027A1 (de) 2014-01-04 2014-10-30 Johannes Burde Teleskopsystem für die Integration in Monoblock- und Verstellausleger für das Verfahren des Stiel- und Hauptlagers

Also Published As

Publication number Publication date
FR2930267A1 (fr) 2009-10-23
FR2930267B1 (fr) 2011-08-26
EP2112277B1 (de) 2016-09-07
EP2112277A3 (de) 2014-04-30

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