EP2112277B1 - Earthmoving vehicle and loading bucket for such an earthmoving vehicle - Google Patents
Earthmoving vehicle and loading bucket for such an earthmoving vehicle Download PDFInfo
- Publication number
- EP2112277B1 EP2112277B1 EP09305318.9A EP09305318A EP2112277B1 EP 2112277 B1 EP2112277 B1 EP 2112277B1 EP 09305318 A EP09305318 A EP 09305318A EP 2112277 B1 EP2112277 B1 EP 2112277B1
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- EP
- European Patent Office
- Prior art keywords
- bucket
- articulated arm
- support system
- earthmoving vehicle
- accordance
- 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.)
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- 239000003381 stabilizer Substances 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
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- 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 E02F3/00Â -Â 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 frame 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 operating 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. When this is done, the chassis 2 transmits its movement to the bucket 16 not only via the articulated arm 6. In fact, it also exerts a thrust via the stabilizers 18, which then form support devices for the 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 filling is completed, the bucket 16 is lifted by the arm 10 which, to this end, swings upward in the direction indicated by arrow B 1, while the arrow 7 and the boom-against 9 remain immobile in relation to 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 referenced to a portion of the loader excavator 1 is constructed by adding the reference 100 denoting that portion in the loader excavator 1.
- references of the articulated arm 106, boom 107, the joint 108, the counter-boom 109, the arm 110, the joints 111, 112 and 115 of the excavator-loader 101 are obtained including references of the articulated arm 106, boom 107, the joint 108, the counter-boom 109, the arm 110, the joints 111, 112 and 115 of the excavator-loader 101.
- the frame 102 of the loader excavator 101 is supported by a rolling assembly that comprises two side tracks 103 instead of the four wheels 3.
- the chassis 102 is not provided with 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.
- 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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Description
La présente invention se rapporte au domaine des travaux publics. Plus précisément, elle concerne un engin de terrassement tel qu'une chargeuse-excavatrice, ainsi qu'un godet de chargement pour un tel engin de terrassement.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.
Il existe plusieurs types d'engins de travaux publics, parmi lesquels il y a les chargeuses classiques et les excavatrices. Les chargeuses ont pour fonction de ramasser des matériaux au niveau du sol, afin de pouvoir les déverser ensuite à un endroit différent, par exemple dans une benne ou sur tas. Une chargeuse classique comprend un châssis automoteur et un godet avant de chargement, que supportent un ou plusieurs bras rigides et articulés à ce châssis automoteur.There are several types of construction machinery, among which there are conventional loaders and excavators. The loaders have the function of picking up materials at ground level, so that they can then be dumped at a different place, for example in a bucket or on a pile. 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.
Une excavatrice sert à creuser dans le sol. Elle comprend classiquement un bras articulé de manoeuvre d'un outil denté conçu pour pouvoir être enfoncé dans le sol et le démembrer.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.
Une excavatrice peut être conçue de manière à pouvoir être également utilisée comme chargeuse. Il s'agit alors d'une chargeuse-excavatrice dont le bras articulé peut être équipé, au choix, d'un outil de creusement ou d'un godet de chargement. Un tel godet est chargé en étant poussé sur le sol, vers l'avant, dans le matériau à ramasser. La poussée alors exercée sur ce godet de chargement pour le faire avancer résulte d'un déplacement de la chargeuse-excavatrice elle-même et elle est transmise par le bras articulé qui, de ce fait, peut alors être soumis à de multiples efforts. En particulier, ce bras articulé peut être sollicité en torsion lorsque le godet poussé rencontre une résistance à proximité de l'une seulement de ses deux extrémités latérales. Alors qu'il peut donc être soumis à des torsions de valeurs très élevées, le bras articulé doit posséder une masse raisonnable, notamment afin de pouvoir manoeuvrer aisément un outil de creusement. Le problème résultant de ce que le bras articulé peut être soumis à une torsion élevée est encore plus aigu lorsque ce bras articulé est déporté latéralement, dans la mesure où cela se traduit par une augmentation du bras de levier de la partie gauche ou droite du godet de chargement, par rapport à la zone d'articulation de ce godet sur le bras articulé.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. 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.
Dans le document
Le document
L'invention a au moins pour but d'améliorer la capacité d'un engin de terrassement d'exercer une poussée sur un godet de chargement équipant cet engin.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.
Selon l'invention, ce but est atteint grâce à un engin de terrassement, comprenant un châssis porté par un ensemble roulant, ainsi qu'un bras articulé de support et de manoeuvre d'un outil tel qu'un godet de chargement. Cet engin de terrassement comporte également au moins un dispositif d'appui pour un godet de chargement dans une position basse de ramassage. Par l'intermédiaire de ce dispositif d'appui, le châssis est à même d'exercer une poussée sur le godet de chargement dans un sens de déplacement de l'engin de terrassement, lorsque le bras articulé tient ce godet dans la position basse de ramassage.According to the invention, this object is achieved by means of 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.
Lorsque le godet porte sur le dispositif d'appui, celui-ci est à même d'effectuer une reprise d'effort de manière à soulager le bras articulé, ainsi qu'une articulation entre ce bras et le godet. En particulier, grâce à l'invention, un engin de terrassement peut être conçu de manière à pouvoir exercer de nombreuses poussées fortes sur un godet, sans qu'il s'ensuivent une disfonctionnement ou une usure prématurées du bras de support de ce godet.When the bucket is on the support device, it is able to perform a recovery of effort so as to relieve the articulated arm, and a joint between the arm and the bucket. In particular, thanks to the invention, 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.
Le godet de chargement est un outil qui peut être monté sur le bras articulé par l'intermédiaire d'un porte-outil et qui fait partie d'une tête de travail articulée à ce bras. On notera que l'invention présente l'avantage d'être compatible avec des architectures éprouvées et performantes d'accouplement de la tête de travail à l'actionneur de manoeuvre de cette tête de travail autour de son axe de basculementThe 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.
Avantageusement, cet engin comporte un deuxième dispositif d'appui par l'intermédiaire duquel le châssis peut exercer une poussée sur un godet de chargement, dans ledit sens de déplacement, lorsque le bras articulé tient ce godet dans la position basse de ramassage, l'un et l'autre dispositif d'appui étant décalés horizontalement l'un de l'autre.Advantageously, this machine comprises a second support device through which the frame 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.
Avantageusement, l'un et l'autre dispositif d'appui sont positionnés de telle manière que, lorsqu'il tient le godet dans la position basse de ramassage, le bras articulé se trouve entre ces deux dispositifs d'appui de manière à n'être que peu voire pas sollicité en torsion lors du chargement du godet par déplacement de ce godet sur le sol.Advantageously, 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.
Avantageusement, l'engin de terrassement est plus précisément une chargeuse-excavatrice qui comporte un porte-outil d'accouplement réversible d'un outil à une extrémité distale dudit bras articulé, c'est-à -dire à l'extrémité la plus éloignée du châssis, et dont ce bras articulé comporte une succession de plusieurs segments basculants dans des plans sensiblement verticaux.Advantageously, 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.
Avantageusement, les segments basculants du bras articulé comprennent un segment distal et plusieurs autres segments basculants dont chacun est déplaçable entre des première et deuxième positions de fin de course telles que, lorsque chacun de ces plusieurs autres segments basculants est immobilisé dans sa première position de fin de course, la position basse de chargement du godet est atteinte moyennant seulement un basculement du segment distal autour d'une extrémité proximale de ce segment distal.Advantageously, 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.
Avantageusement, l'engin comporte une articulation entre une extrémité distale du bras articulé et le godet porté par ce bras articulé, le dispositif d'appui définissant un axe d'alignement sensiblement horizontal avec lequel l'axe de ladite articulation coïncide sensiblement, lorsque le bras articulé tient le godet dans ladite position basse de ramassage, et autour duquel le godet bascule en restant en appui sur le dispositif d'appui lorsque l'axe de l'articulation et l'axe d'alignement coïncident.Advantageously, 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.
Avantageusement, le dispositif d'appui comporte une surface d'appui du godet dans sa position basse de ramassage, cette surface d'appui comportant une concavité qui possède un rayon de courbure constant et centré sur ledit axe d'alignement.Advantageously, 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.
Avantageusement, le dispositif d'appui comporte une fente de guidage percée dans la surface d'appui.Advantageously, the support device comprises a guide slot pierced in the bearing surface.
Avantageusement, le dispositif d'appui comporte une lame transversale de raclage déplaçable entre une position basse de raclage et une position haute dans laquelle le godet peut venir en appui contre le dispositif d'appui en se plaçant dans sa position basse de ramassage, ladite surface d'appui se trouvant au niveau d'une face avant de la lame transversale de raclage.Advantageously, 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.
Avantageusement, le dispositif d'appui comporte un sabot d'appui et une articulation dont un axe de rotation forme ledit axe d'alignement et par l'intermédiaire de laquelle le sabot est articulé de manière à pouvoir basculer autour de cet axe de rotation.Advantageously, 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.
Avantageusement, ledit sabot est constitué par le pied d'un stabilisateur et est déplaçable entre une position basse de support d'une partie de l'engin de terrassement et une position haute dans laquelle le godet peut venir en appui contre ce sabot en se plaçant dans sa position basse de ramassage.Advantageously, 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.
Avantageusement, l'engin de terrassement comporte un godet de chargement que porte ledit bras articulé, ce bras articulé étant à même d'amener le godet dans une position où le godet est en appui sur le dispositif d'appui et qui est ladite position basse de ramassage.Advantageously, 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.
L'invention a également pour objet un godet de chargement pour un engin de terrassement. Ce godet comporte au moins un poussoir de réception d'une poussée depuis l'arrière et de transmission de cette poussée globalement dans un sens de déplacement correspondant à l'avance du godet vers l'avant pour un ramassage.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.
Avantageusement, le poussoir comporte un dispositif arrière de roulement sur une surface d'appui de l'engin de terrassement.Advantageously, the pusher comprises a rear rolling device on a bearing surface of the earthmoving machine.
Avantageusement, le dispositif arrière de roulement comporte deux galets qui ont des axes de rotation respectifs sensiblement horizontaux et qui sont décalés angulairement l'un de l'autre autour d'un axe sensiblement horizontal de basculement du godet.Advantageously, 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.
L'invention sera bien comprise à la lecture de la description qui va suivre, donnée à titre d'exemple non limitatif et faite en se référant aux dessins annexés, parmi lesquels :
- la
figure 1 est une vue en perspective d'une chargeuse-excavatrice selon un premier mode de réalisation de l'invention ; - les
figures 2 et3 sont des élévations latérales et schématiques analogues, qui représentent la même chargeuse-excavatrice que lafigure 1 et qui en illustrent un fonctionnement en montrant deux positions possibles d'un godet de chargement de cette chargeuse-excavatrice ; - la
figure 4 est une vue en perspective de la portion avant d'une chargeuse-excavatrice selon un deuxième mode de réalisation de l'invention ; - la
figure 5 est une élévation latérale de la chargeuse-excavatrice partiellement représentée à lafigure 4 ; et - la
figure 6 est une élévation latérale qui représente partiellement la même chargeuse-excavatrice que lafigure 4 , mais dans une configuration différente de celle de lafigure 5 . et qui montre comment un godet de cette chargeuse-excavatrice.
- the
figure 1 is a perspective view of a loader-excavator according to a first embodiment of the invention; - the
figures 2 and3 are similar lateral and schematic elevations, which represent the same loader-excavator as thefigure 1 and which illustrate an operation by showing two possible positions of a loading bucket of this loader-excavator; - the
figure 4 is a perspective view of the front portion of a loader-excavator according to a second embodiment of the invention; - the
figure 5 is a side elevation of the loader-excavator partially represented in thefigure 4 ; and - the
figure 6 is a side elevation that partially represents the same loader-excavator as thefigure 4 but in a configuration different from that of thefigure 5 . and who shows how a bucket of this loader-excavator.
Sur la
De manière connue en soi, le bras articulé 6 comporte trois segments basculants dans des plans sensiblement verticaux, c'est-à -dire autour d'axes sensiblement horizontaux. Ces trois segments sont montés à la suite les uns des autres en étant articulés entre eux. Le premier d'entre eux est référencé 7 et s'appelle classiquement la flèche. Il est relié à la tourelle 4 par une articulation 8, de manière à pouvoir basculer autour d'un axe sensiblement horizontal X1-X'1. In a manner known per se, the articulated
Les deux autres segments du bras articulé 6 sont la contre-flèche, référencée 9, et le bras, référencé 10. La contre-flèche 9 est reliée à la flèche 7 par une articulation 11, de manière à pouvoir basculer par rapport à la flèche 7, autour d'un axe X2-X'2 sensiblement horizontal.The other two segments of the articulated
A l'opposé de l'articulation 11, la contre-flèche 9 porte le bras 10, qui lui est relié par une articulation 12 de manière à pouvoir basculer autour d'un axe X3-X'3 sensiblement horizontal et qui est le segment distal du bras articulé 6. Opposite the
Les manoeuvres de la flèche 7 par rapport à la tourelle 4, de la contre-flèche 9 par rapport à cette flèche 7 et du bras 10 par rapport à cette contre-flèche 9 sont le fait de vérins hydrauliques, qui sont disposés d'une manière connue en soi et dont un seul est visible et référencé 6A à la
L'extrémité distale du bras 10 est pourvue d'un porte-outil 14, qui lui est articulé au moyen d'une articulation 15 et sur lequel peuvent être montés de manière réversible plusieurs outils amovibles de différents types. Le bras 10 porte un vérin 13 de manoeuvre du porte-outil 14 autour de l'axe sensiblement horizontal X4-X'4 de l'articulation 15. Le dispositif d'accouplement du porte-outil 14 au vérin 13 comporte deux biellettes articulées l'une à l'autre, à savoir une première biellette articulée au bras 10 et une deuxième biellette articulée au porte-outil 14. Ainsi, ces deux biellettes, une portion du bras 10 et au moins une portion du porte-outil 14 forment ensemble un parallélogramme déformable sur lequel le vérin 13 agit pour manoeuvrer le porte-outil 14 et, plus généralement, la tête de travail que forment ensemble ce porte-outil et un outil l'équipant.The distal end of the
Sur la
La chargeuse-excavatrice 1 comporte encore deux stabilisateurs gauche et droit 18, dont chacun est articulé au châssis 2 de manière à pouvoir être manoeuvré par un vérin 19 entre deux positions. L'une de ces deux positions est celle des
Un outil autre que le godet de chargement 16 peut être monté sur le porte-outil 14. Par exemple, il peut s'agir d'un godet de creusement, moins large que le godet 16 et monté de manière que son dos soit globalement tourné vers le haut. Lorsqu'un tel godet de creusement non représenté équipe la chargeuse-excavatrice 1, le bras articulé 6 effectue des mouvements complexes au cours desquels chacun de ses segments 7, 9 et 10 bascule autour de son extrémité proximale.A tool other than the
Lorsque son bras articulé 6 est pourvu du godet de chargement 7, la chargeuse-excavatrice 1 est destinée à fonctionner en chargeuse. Dans ce cas, les articulations 8 et 11 sont figées, dans la mesure où seul le bras 10 est manoeuvré. En d'autres termes, la flèche 7 et la contre-flèche 9 forment un sous-ensemble fixe. La flèche 7 est alors immobilisée dans l'une de ses deux positions extrêmes ou positions de fin de course, dans lesquelles elle est en butée. Il en est de même de la contre-flèche 9. De ce fait, la configuration du sous-ensemble fixe du bras articulé 6 est facilement atteinte par mise en butée de la flèche 7 et de la contre-flèche 9. When its articulated
En basculant autour de l'axe X3-X'3, le bras 10 peut déplacer le godet de chargement 16 entre une position haute de déversement et une position basse de ramassage, qui est celle des
Lorsque les sabots 21 sont dans leur position haute, c'est-Ã -dire dans leur position des
Lorsque la chargeuse-excavatrice 1 est dans sa configuration des
Il ressort de ce qui précède que le bras articulé 6 est peu sollicité lors de la phase du ramassage. Il est en particulier peu sollicité en torsion, même si le godet 16 rencontre une résistance au voisinage de l'une de ses deux extrémités latérales.It follows from the above that the articulated
Lorsque son remplissage est achevé, le godet 16 est soulevé par le bras 10 qui, pour ce faire, bascule vers le haut dans le sens indiqué par la flèche B1, tandis que la flèche 7 et la contre-flèche 9 restent immobiles par rapport à la tourelle 4. When filling is completed, the
Pour ramener le godet 16 dans sa position basse de ramassage, il suffit de faire basculer le bras 10 dans le sens B2 inverse, jusqu'à ce que les poussoirs 17 butent contre les stabilisateurs 18. L'action de ramener le godet 6 dans sa position basse de ramassage est donc extrêmement aisée à piloter.To return the
Sur la
Le châssis 102 de la chargeuse-excavatrice 101 est supporté par un ensemble roulant qui comprend deux chenilles latérales 103 au lieu des quatre roues 3. Ce châssis 102 n'est pas pourvu de stabilisateur. En revanche, il est équipé d'un ensemble de raclage qui comprend une lame avant 150 portée par un support basculant 151. Ce support 151 est articulé au châssis 102 de manière que la lame 150 puisse être manoeuvrée par un vérin 119 entre une position basse de raclage et une position haute qui est celle des
La face avant 152 de la lame 150 forme une concavité allongée transversalement. Au niveau de cette concavité, la face avant 152 porte deux plaques 153, dont chacune est percée d'une fente globalement verticale de guidage 154. The
L'extrémité arrière de chaque poussoir 117 est pourvue d'un dispositif de roulement qui est constitué de deux galets 155 décalés angulairement l'un de l'autre autour de l'axeThe rear end of each
X4-X'4 de basculement du godet 116, d'un angle noté α à la
Lorsque le godet 116 est dans sa position basse de ramassage, ses deux poussoirs 117 sont en appui sur les lames 150, par l'intermédiaire de leurs galets 155. Les surfaces de roulement 156 sont cylindriques et centrées sur un axe d'alignement X5-X'5 avec lequel l'axe X4-X'4 coïncide sensiblement lorsque le godet 116 est dans sa position basse de ramassage. Grâce à cela, ce godet 116 peut basculer autour de son axe de basculement X4-X'4 tout en restant en appui contre les plaques 153, ce qui ressort d'une comparaison des
Claims (10)
- Earthmoving vehicle, incorporating a chassis (2; 102) carried on a mobile assembly (3; 103), with an articulated arm (6; 106) for mounting and operating a tool such as a loading bucket (16; 116), at least one support system (18; 150, 151, 153) for a loading bucket (16; 116) in a low pickup position, characterized in that the support system (18; 150, 151, 153) by means of which the chassis (2; 102) is able to exert thrust upon the aforesaid loading bucket (16; 116) in a direction (A) of movement of the earthmoving vehicle, when the articulated arm (6; 106) holds the bucket (16; 116) in the low pickup position, and
characterized in that it incorporates an articulation (15; 115) between one distal end of the articulated arm (6; 106) and the bucket (16; 116) carried by the said articulated arm, with the support system (18; 150, 151, 153) defining an essentially-horizontal alignment axis (X5-X'5), with which the axis (X4-X'4) of the said articulation (15; 115) essentially coincides, when the articulated arm (6; 106) holds the bucket (16; 116) in the said low pickup position, and around which the bucket (16; 116) tips while remaining bearing against the support system (18; 150, 151, 153) when the axis (X4-X'4) of the articulation (15; 115) and the alignment axis (X5-X'5) coincide. - Earthmoving vehicle in accordance with claim 1, characterized in that the support system (150, 151, 153) incorporates a bearing surface (156) for the bucket (116), in its low pickup position; this bearing surface (156) incorporates a concavity that has a radius of curvature that is constant and centered on the said alignment axis (X5-X'5).
- Earthmoving vehicle in accordance with claim 2, characterized in that the support system (150, 151, 153) incorporates a guide slot (153) provided in the bearing surface (156).
- Earthmoving vehicle in accordance with any one of claims 2 and 3, characterized in that the support system (150, 151, 153) incorporates a transversal scraper blade (150) that is movable between a low scraping position and a high position in which the bucket (116) can come to bear against the support system, while placing itself in its low pickup position, with the said bearing surface (156) being located level with a front face (152) of the transversal scraper blade (150).
- Earthmoving vehicle in accordance with claim 1, characterized in that the support system (18) incorporates a bearing shoe (21) and an articulation (22) of which one rotation axis (X5-X'5) forms the said axis of alignment, and by which the shoe (21) is articulated in order to be able to tip around this rotation axis (X5-X'5).
- Earthmoving vehicle in accordance with claim 5, characterized in that the said shoe is constituted by the foot (21) of a stabilizer (18), and is movable between one low position of supporting one part of the earthmoving vehicle and one high position in which the bucket (16) can come to bear against this shoe (21), while placing itself in its low pickup position.
- Earthmoving vehicle in accordance with any one of the preceding claims, characterized in that it involves a loader/excavator that has a tool holder (14) for a reversible coupling of a tool (16; 116) to one distal end of the said articulated arm (6; 106), with the articulated arm incorporating a succession of multiple segments (7, 9, 10; 107, 109, 110) that tip in essentially-vertical planes.
- Earthmoving vehicle in accordance with claim 7, characterized in that the tipping segments of the articulated arm (6; 106) incorporate a distal segment (10; 110) and multiple other tipping segments (7, 9; 107, 109), with each being movable between the first and second end-of-travel positions such that, when each of these multiple other tipping segments (7, 9; 107, 109) is immobilized in its first end-of-travel position, the low loading position of the bucket (16; 116) is attained with only a tipping (B2) of the distal segment (10; 110) around one proximal end of this distal segment.
- Earthmoving vehicle in accordance with any one of the preceding claims, characterized in that it incorporates a second support system (18; 150, 151, 153) by means of which the chassis (2; 102) can exert thrust on a loading bucket (16; 116), in the said direction of movement (A), when the articulated arm (6; 106) holds the said bucket in the said low pickup position, with both support systems (18; 150, 151, 153) being offset horizontally in relation to each other.
- Earthmoving vehicle in accordance with any one of the preceding claims, characterized in that it incorporates a loading bucket (16; 116) carried by the said articulated arm (6; 105), with this articulated arm being able to bring the bucket (16; 116) into a position in which the bucket (16; 116) is bearing against the support system (18; 150, 151, 153), and which is the said low pickup position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0852684A FR2930267B1 (en) | 2008-04-21 | 2008-04-21 | TERRAINING ENGINE AND LOADING BUCKET FOR SUCH A TERRACE ENGINE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2112277A2 EP2112277A2 (en) | 2009-10-28 |
EP2112277A3 EP2112277A3 (en) | 2014-04-30 |
EP2112277B1 true EP2112277B1 (en) | 2016-09-07 |
Family
ID=39816722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09305318.9A Active EP2112277B1 (en) | 2008-04-21 | 2009-04-14 | Earthmoving vehicle and loading bucket for such an earthmoving vehicle |
Country Status (2)
Country | Link |
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EP (1) | EP2112277B1 (en) |
FR (1) | FR2930267B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014000027A1 (en) | 2014-01-04 | 2014-10-30 | Johannes Burde | Telescopic system for integration in monoblock and adjustable boom for the procedure of the stem and main bearing |
Family Cites Families (8)
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 |
FR2119625A5 (en) * | 1970-12-23 | 1972-08-04 | Sogl Rupert | |
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 (en) * | 2002-11-13 | 2004-07-15 | Bauer Spezialtiefbau Gmbh | Milling device for producing a cut in the ground comprises a force-transfer element having an adjusting device which changes the length of the force-transfer element to adjust the angle of incline of a milling strut |
-
2008
- 2008-04-21 FR FR0852684A patent/FR2930267B1/en active Active
-
2009
- 2009-04-14 EP EP09305318.9A patent/EP2112277B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2112277A3 (en) | 2014-04-30 |
EP2112277A2 (en) | 2009-10-28 |
FR2930267A1 (en) | 2009-10-23 |
FR2930267B1 (en) | 2011-08-26 |
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