EP1245739A1 - Engin de travaux publics - Google Patents
Engin de travaux publics Download PDFInfo
- Publication number
- EP1245739A1 EP1245739A1 EP02356029A EP02356029A EP1245739A1 EP 1245739 A1 EP1245739 A1 EP 1245739A1 EP 02356029 A EP02356029 A EP 02356029A EP 02356029 A EP02356029 A EP 02356029A EP 1245739 A1 EP1245739 A1 EP 1245739A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turret
- cylinders
- boom
- public works
- machine according
- 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
Links
Images
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
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
-
- 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
Definitions
- the invention relates to the field of public works machinery. It relates to more particularly machines comprising an articulated arm. It targets a improvement to this type of machine, which makes it possible to take advantage of a large amplitude arm movements.
- public works vehicles of the excavator loader type or elevator include a frame on which is mounted a turret.
- This turret receives an articulated arm at the end of which is placed the working tool.
- This tool work can be either a bucket or a loader, depending on the type use.
- the articulated arm comprises several articulated segments the relative to each other. The first segment connected to the turret and generally called "arrow". Depending on the configuration of the arm, it may include a or two additional segments.
- the arm can have to have a large clearance to allow the work tool to move inside as large a volume as possible.
- the machine exercises the excavator function, it can be used to dig deep, practically at vertical to the chassis.
- the same machine when used as a loader, it can be lifted relatively high loads for example to drop them in an evacuation truck.
- the jacks which control the inclination of the different segments of the articulated arm, and the boom itself relative to the turret should be sized and positioned to ensure sufficient effort, whatever the position and configuration of the working arm.
- the parallelogram mechanism occupies a large space next to the cab, which reduces the driver's field of vision.
- Document US-3,900,113 presents a public works machine with a structure comprising a chassis, a turret mounted on the chassis, an arm articulated by report to the turret.
- the movements of the arrow relative to the turret are controlled by the actuation of two cylinders.
- the first cylinder is fixed to the boom by a first axis of attachment.
- This first cylinder is fixed to the structure by a second axis attachment.
- the second cylinder is fixed to the boom by a first attachment axis.
- This same second cylinder is fixed to the structure by a second attachment pin.
- the attachment axes and the pivot axis of the boom constitute the vertices of a first deformable triangle, and the attachment axes and the pivot axis of the boom constitute the vertices of a second deformable triangle. So the two cylinders have two offset attachment pins which are positioned on the arrow and on the turret.
- Document US-4,218,171 describes a public works machine comprising a chassis, a turret mounted on the chassis, an articulated arm comprising an arrow articulated with respect to the turret, and a segment articulated with respect to the boom.
- the boom and segment movements relative to the turret are controlled by the actuation of two cylinders articulated relative to the turret and relative to the segment at the level of attachment axes.
- the two jacks have an attachment axis common on the turret and two offset axes offset on the segment.
- the two jacks have a common attachment axis on the segment and two attachment axes offset on the turret.
- the two cylinders have two offset attachment pins or a common attachment axis that are positioned not on the arrow, but on the segment.
- a problem which the invention proposes to solve is that of providing a simple mechanism that allows a large deflection of the boom without increasing too much strongly the maximum level of effort that the cylinders must exert over the entire range amplitude of inclination of the boom. Indeed, the maximum level of effort conditions the dimensioning of the cylinders to be used, and therefore in part the cost price of the craft.
- the boom is connected to the turret by two cylinders having a single common point located either on the spire or on the turret.
- each of the two cylinders produce a different torque, each being predominant over part of the range of inclination of the boom, so that the maximum effort exerted remains relatively limited.
- the offset between the attachment axes of two cylinders is determined so that, regardless of the inclination of the arrow relative to the turret, at least one of the two cylinders has a lever arm allowing to exert a torque of sufficient lifting.
- one of the two cylinders provides most of the couple.
- the two cylinders exert on the boom a torque of the same sign, whatever the inclination of the arrow relative to the turret. Indeed, it is important that the two cylinders are simultaneously powered to avoid conflicting situations in which the power supplied to one of the cylinders is used to compensate for the effect of the cylinder opposite.
- the common attachment axis of the two cylinders can be located on the turret or on the boom.
- the two cylinders can have their attachment axis common either at the level of their foot, at the level of their head or even at the level of the foot from one, and from the head of the other.
- the two cylinders can be identical, which proves advantageous for questions of manufacture and assembly of the machine.
- the two jacks can be supplied in parallel, with the same precision, which simplifies the hydraulic control device.
- the two cylinders can be supplied independently so as to modulate the force exerted by each cylinder as a function of the arm geometry.
- the invention relates to a versatile public works machine able to exercise the functions of excavator loader, elevator or others.
- the invention is therefore not limited to its only embodiment illustrated in Figure 1, but covers many other variants not shown.
- a machine (1) comprises a chassis (2) equipped with a translation system such as for example wheels (3, 4).
- This chassis (2) receives on its front part a turret (5) which can advantageously be pivotable relative to the frame (2).
- This turret (5) includes a cabin (6) and a zone (7) on which the working arm (10) is articulated.
- the working arm (10) includes an arrow (11) which is directly articulated with respect to the turret (5), as well as two other segments (12, 13). One of these segments (12) is articulated relative to the arrow (11). The other segment (13) receives at its end the working tool (15).
- This tool (15) can be, as illustrated, a bucket or any other type of tool.
- the invention is not limited to the illustrated form of apparatus in which the arm (10) comprises three segments (11, 12, 13) articulated with respect to each other, but it also covers variants in which the arm has only two segments namely the arrow and a segment receiving the work tool.
- the arrow (11) can adopt a position in a range covering approximately 140 °, going to a position illustrated in Figure 2 in which the arrow (11) is tilted slightly below the vertical to a position illustrated in the Figure 1, in which the arrow (11) is oriented at the rear, substantially at 45 °.
- the movement of the arrow (11) relative to the turret (5) is controlled by the actuation of two cylinders (20, 21).
- These two cylinders (20, 21) have a common attachment point (23) at the level of the arrow (11), and the two attachment points (25, 26) offset at the level of the turret (5).
- the two heads (28, 29) of the cylinders (20, 21) are mounted collinearly about an axis common (23) integral with the arrow (11), as can be seen in Figures 3 to 6.
- the feet (30, 31) of the two jacks (20, 21) are each articulated on a proper axis (25, 26) secured to the turret
- the invention covers other variants not shown in which the common point between the two cylinders is located not on the boom, but on the turret, or else in which the orientations of the jacks are opposite to those illustrated in Figures 1 to 6, or even mixed.
- the two cylinders (20, 21) are mounted integral with the turret having at the end the hinge pin (37) around from which the arrow (11) is articulated.
- the two feet (30, 31) of the jacks are positioned at sufficient height for the two jacks (20, 21) to work in the same direction, whatever the inclination of the arrow (11).
- the direction of the two cylinders (20, 21) is always located above the point hinge (37) of the boom (11) relative to the turret (5). In this way, the two cylinders (20, 21), when supplied by the same chamber, exert efforts to same direction and are both driving forces.
- the height offset between the two attachment points (25, 26) of the cylinders (20, 21) located on the turret, is determined so that at least one of the two cylinders is capable of exerting sufficient lifting torque regardless of the position of the boom (11).
- the top cylinder (21) exercises the greatest torque.
- the lower cylinder (20) exerts, at identical effort, a torque greater than that exerted by the top cylinder (21).
- curve 41 the maximum force exerted by the cylinder varies in a ratio of about one to four, which is perfectly acceptable.
- curve (42) illustrates the variation in maximum effort for a system including only one cylinder. The effort in this case varies in a ratio of one to ten, which is totally unacceptable as requiring a very significant oversizing of the cylinder.
- FIGs 8 and 9 show the performances observed respectively in lifting and digging for the solution according to the invention and the cylinder solution unique from the prior art, in comparison with the solution of the deformable quadrilateral described in document FR-2.532.671. More precisely, we have plotted on the abscissa the angle in degree that the arrow forms with the horizontal, and on the ordinate the comparison of performance compared to the deformable quadrilateral solution. Specifically, each curve represents, as a function of the angle of the arrow, the ratio of the force exerted on the value of the force exerted for the same angle of deflection with the so-called solution of deformable quadrilateral. It can thus be seen in Figure 8, that the lifting performance are higher for the solution according to the invention (curve 51) compared to the single cylinder solution (curve 52).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
- un châssis,
- une tourelle montée sur le châssis,
- un bras articulé comprenant :
- une flèche articulée par rapport à la tourelle,
- au moins un segment dont un est articulé par rapport à la flèche.
- un axe d'attache commun sur la tourelle ou sur la flèche ;
- deux axes d'attache décalés sur la flèche ou sur la tourelle.
Avantageusement en pratique, les deux vérins peuvent être alimentés en parallèle, avec la même précision, ce qui simplifie le dispositif de commande hydraulique.
- les Figures 1 et 2 sont des vues de côté générales d'un engin conforme à l'invention dans lequel le bras articulé est représenté dans deux configurations extrêmes.
- la Figure 3 est une vue de côté de détail de la cabine des deux vérins et de la flèche conforme à l'invention.
- la Figure 4 est une vue en perspective de trois quarts arrière gauche de la cabine et des deux vérins de la flèche de la Figure 3.
- la Figure 5 est une vue de détail de trois quarts avant de l'assemblage des deux vérins et de la flèche conformément à l'invention.
- la Figure 6 est une vue en perspective de trois quarts de dessus de l'assemblage de la Figure 5.
- la Figure 7 est un diagramme illustrant la variation de l'effort à exercer pour obtenir un couple constant sur toute la plage d'inclinaison de la flèche, pour l'engin conforme à l'invention, et deux solutions différentes.
- la Figure 8 est un diagramme illustrant un comparatif des performances de relevage sur toute la plage d'inclinaison de la flèche, pour un engin conforme à l'invention comparé à une solution de l'Art antérieur.
- la Figure 9 est un diagramme illustrant un comparatif des performances de creusement sur toute la plage d'inclinaison de la flèche, pour un engin conforme à l'invention comparé à une solution de l'Art antérieur.
- la même pression maximum exercée pour l'ensemble des vérins,
- la même surface totale du côté de la grande chambre des vérins,
- la même surface annulaire totale du côté de la petite chambre des vérins.
- d'un vérin 160 x 90 (c'est-à-dire ayant un piston de diamètre 160 mm et une tige de diamètre 90 mm) pour le cas du quadrilatère déformable ou du vérin unique, correspondant aux solutions de l'Art antérieur. Dans ce cas, la surface de la grande chambre vaut 20.106 mm2, et la surface de la petite chambre vaut 13.774 mm2 ;
- et de deux vérins 110 x 60 pour la solution de l'invention. Dans ce cas, la surface de la grande chambre vaut 19.007 mm2 et la surface petite chambre vaut 13.352 mm2.
- une simplicité mécanique ;
- une libération de l'espace latéral de la cabine augmentant la visibilité du conducteur ;
- un couple de levage suffisant quelle que soit l'inclinaison de la flèche, sans nécessiter l'emploi de vérin surdimensionné ;
- un effort maximal qui varie de façon nettement plus limitée que pour un système n'incluant qu'un seul vérin ;
- des performances nettement supérieures à celles des engins utilisant soit un seul vérin, soit un mécanisme de quadrilatère déformable.
Claims (12)
- Engin de travaux publics (1), du type chargeur excavateur ou élévateur, comportant :un châssis (2),une tourelle (5) montée sur le châssis (2),un bras articulé (10) comprenant :une flèche (11) articulée par rapport à la tourelle (5),au moins un segment (12, 13) dont un (12) est articulé par rapport à la flèche (11),un axe d'attache commun (23) sur la tourelle ou sur la flèche (11) ;deux axes d'attache décalés (25, 26) sur la flèche ou sur la tourelle (5).
- Engin de travaux publics selon la revendication 1, caractérisé en ce que le décalage entre les axes d'attache (25, 26) des deux vérins (20, 21) est déterminé pour que, quelle que soit l'inclinaison de la flèche (11) par rapport à la tourelle (5), au moins un des vérins (20, 21) possède un bras de levier permettant d'exercer un couple de relevage suffisant.
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins (20, 21) exercent sur la flèche (11) un couple de même signe, quelle que soit l'inclinaison de la flèche (11) par rapport à la tourelle (5).
- Engin de travaux publics selon la revendication 1, caractérisé en ce que l'axe d'attache commun des deux vérins est situé sur la tourelle.
- Engin de travaux publics selon la revendication 1, caractérisé en ce que l'axe d'attache commun (23) des deux vérins (20, 21) est situé sur la flèche (11).
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins (20, 21) présentent leur axe d'attache commun (23) au niveau de leur pied (28, 29).
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins présentent leur axe d'attache commun au niveau de leur tête.
- Engin de travaux publics f selon la revendication 1, caractérisé en ce que les deux vérins présentent leur axe d'attache commun au niveau du pied de l'un et de la tête de l'autre.
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins (20, 21) sont identiques.
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins (20, 21) sont différents.
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins (20, 21) sont alimentés en parallèle.
- Engin de travaux publics selon la revendication 1, caractérisé en ce que les deux vérins (20, 21) sont alimentés indépendamment.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0104272A FR2822860B1 (fr) | 2001-03-29 | 2001-03-29 | Engin de travaux publics |
FR0104272 | 2001-03-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1245739A1 true EP1245739A1 (fr) | 2002-10-02 |
EP1245739B1 EP1245739B1 (fr) | 2016-11-09 |
Family
ID=8861706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02356029.5A Expired - Lifetime EP1245739B1 (fr) | 2001-03-29 | 2002-02-14 | Engin de travaux publics |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1245739B1 (fr) |
FR (1) | FR2822860B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003066981A2 (fr) * | 2002-02-07 | 2003-08-14 | Dingenis Laurens Huissoon | Appareil mobile de terrassement et d'autres travaux tels que le levage et le deplacement de charges |
EP2639360A2 (fr) | 2008-07-14 | 2013-09-18 | Hudson Bay Holding B.V. | Appareil mobile |
CN111827380A (zh) * | 2020-07-31 | 2020-10-27 | 杨军 | 适用于河道作业的长距离挖掘机动臂 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204792A (en) * | 1963-10-08 | 1965-09-07 | Beloit Corp | Adjustable boom for material handling apparatus |
US3862697A (en) * | 1972-08-24 | 1975-01-28 | Caterpillar Tractor Co | Front loading hydraulic excavator |
US3900113A (en) * | 1973-07-19 | 1975-08-19 | Poclain Sa | Apparatus for adjusting the relative inclinations of pivotable members |
US4103791A (en) * | 1977-06-03 | 1978-08-01 | Harnischfeger Corporation | Shovel attachment means for hydraulic excavator |
US4218171A (en) * | 1977-05-04 | 1980-08-19 | Societe Anonyme de Droit Francais, Poclain | Public works machine including control jacks in a boom balance assembly |
US4465425A (en) * | 1981-02-06 | 1984-08-14 | O&K Orenstein & Koppel Aktiengesellschaft | Device for the paraxial kinetic control of a lifting machine boom |
FR2548242A2 (fr) * | 1980-05-28 | 1985-01-04 | Poclain Sa | Engin de terrassement, tel notamment qu'une pelle hydraulique |
RU2007515C1 (ru) * | 1991-05-12 | 1994-02-15 | Оренбойм Борис Данилович | Рабочее оборудование одноковшового гидравлического экскаватора |
EP0791693A1 (fr) * | 1994-11-08 | 1997-08-27 | Komatsu Ltd. | Engin de chantier |
-
2001
- 2001-03-29 FR FR0104272A patent/FR2822860B1/fr not_active Expired - Lifetime
-
2002
- 2002-02-14 EP EP02356029.5A patent/EP1245739B1/fr not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204792A (en) * | 1963-10-08 | 1965-09-07 | Beloit Corp | Adjustable boom for material handling apparatus |
US3862697A (en) * | 1972-08-24 | 1975-01-28 | Caterpillar Tractor Co | Front loading hydraulic excavator |
US3900113A (en) * | 1973-07-19 | 1975-08-19 | Poclain Sa | Apparatus for adjusting the relative inclinations of pivotable members |
US4218171A (en) * | 1977-05-04 | 1980-08-19 | Societe Anonyme de Droit Francais, Poclain | Public works machine including control jacks in a boom balance assembly |
US4103791A (en) * | 1977-06-03 | 1978-08-01 | Harnischfeger Corporation | Shovel attachment means for hydraulic excavator |
FR2548242A2 (fr) * | 1980-05-28 | 1985-01-04 | Poclain Sa | Engin de terrassement, tel notamment qu'une pelle hydraulique |
US4465425A (en) * | 1981-02-06 | 1984-08-14 | O&K Orenstein & Koppel Aktiengesellschaft | Device for the paraxial kinetic control of a lifting machine boom |
RU2007515C1 (ru) * | 1991-05-12 | 1994-02-15 | Оренбойм Борис Данилович | Рабочее оборудование одноковшового гидравлического экскаватора |
EP0791693A1 (fr) * | 1994-11-08 | 1997-08-27 | Komatsu Ltd. | Engin de chantier |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003066981A2 (fr) * | 2002-02-07 | 2003-08-14 | Dingenis Laurens Huissoon | Appareil mobile de terrassement et d'autres travaux tels que le levage et le deplacement de charges |
WO2003066981A3 (fr) * | 2002-02-07 | 2004-07-29 | Dingenis Laurens Huissoon | Appareil mobile de terrassement et d'autres travaux tels que le levage et le deplacement de charges |
JP2005526194A (ja) * | 2002-02-07 | 2005-09-02 | ハイスソーン,ディンヘニス・ラウレンス | 土木作業および、載荷を昇降および移送するなどの他の作業用の可動装置 |
US7287949B2 (en) | 2002-02-07 | 2007-10-30 | Dingenis Laurens Huissoon | Mobile apparatus for earth moving and other operations such as lifting and displacing of loads |
JP4677190B2 (ja) * | 2002-02-07 | 2011-04-27 | ハイスソーン,ディンヘニス・ラウレンス | 土木作業および、載荷を昇降および移送するなどの他の作業用の可動装置 |
EP2639360A2 (fr) | 2008-07-14 | 2013-09-18 | Hudson Bay Holding B.V. | Appareil mobile |
CN111827380A (zh) * | 2020-07-31 | 2020-10-27 | 杨军 | 适用于河道作业的长距离挖掘机动臂 |
Also Published As
Publication number | Publication date |
---|---|
FR2822860B1 (fr) | 2003-08-15 |
FR2822860A1 (fr) | 2002-10-04 |
EP1245739B1 (fr) | 2016-11-09 |
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