EP0448849B1 - Flèche pour un excavateur ou similaire - Google Patents

Flèche pour un excavateur ou similaire Download PDF

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Publication number
EP0448849B1
EP0448849B1 EP90250314A EP90250314A EP0448849B1 EP 0448849 B1 EP0448849 B1 EP 0448849B1 EP 90250314 A EP90250314 A EP 90250314A EP 90250314 A EP90250314 A EP 90250314A EP 0448849 B1 EP0448849 B1 EP 0448849B1
Authority
EP
European Patent Office
Prior art keywords
arm
piston
boom
articulated
cylinder unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90250314A
Other languages
German (de)
English (en)
Other versions
EP0448849A1 (fr
Inventor
Kurt-Arno Dr.-Ing. Kruse
Kurt Schneider
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.)
Atlas Weyhausen GmbH
Original Assignee
Atlas Weyhausen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE9003519U external-priority patent/DE9003519U1/de
Application filed by Atlas Weyhausen GmbH filed Critical Atlas Weyhausen GmbH
Publication of EP0448849A1 publication Critical patent/EP0448849A1/fr
Application granted granted Critical
Publication of EP0448849B1 publication Critical patent/EP0448849B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • 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
    • E02F3/32—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 downwardly and towards the machine, e.g. with backhoes

Definitions

  • the invention relates to a boom for a backhoe or the like, consisting of (at least) two articulated interconnected (representing boom sections) first and second arms, which by means of a piston-cylinder arrangement (generally consisting of two pistons arranged essentially parallel to each other -Cylinder units) are to be pivoted relative to one another, which runs in front of or below the connecting line through the two articulation points (on the device frame or on the second arm) of the first arm, the one (first) arm being articulated on the device frame and the Articulation point of the piston-cylinder arrangement on the second Arm is arranged at a distance from the articulation point of the second arm on the first arm.
  • a piston-cylinder arrangement generally consisting of two pistons arranged essentially parallel to each other -Cylinder units
  • Such a boom which is also referred to in practice as a "hydraulic adjustable boom” with regard to its regularly hydraulically operated piston-cylinder arrangement, can be found in the brochure "ATLAS 1704 mobile excavator” from Atlas Weyhausen H. Weyhausen KG Maschinenfabrik, D-27751 Delmenhorst, Known from July 1986, in which the piston-cylinder arrangement serves to stretch or shorten the (entire) boom according to the work to be done (or driving position) and is arranged on the front or bottom of the boom, and in such a way that the piston-cylinder arrangement consisting of two parallel, hydraulic piston-cylinder units is articulated at one end to a front lateral section of the first boom arm (laterally), while at its other end (with the two piston rods) is articulated on the side of the second arm.
  • Such a generic design in which the piston-cylinder arrangement is arranged on the bottom or front of the boom, has the considerable advantage that the boom arm can be supported on the relatively large piston area of the piston-cylinder arrangement, which is particularly advantageous in particular with relatively large payloads or other loads.
  • Another advantage of such an arrangement is that the location of the highest bending moment (in the second arm of the boom) does not lie where the two arms are connected to one another, especially since, as is well known, the torque for turning the Poor must be initiated.
  • a certain disadvantage of this known boom arrangement is that the side profile of the boom is determined, among other things, by the piston-cylinder arrangement. Because both in the driving position (which is relatively uncritical) and in the working positions, the piston-cylinder arrangement with the sections of the two arms facing each other clearly forms a triangle, and the piston-cylinder units of the pistons are also in plan view or projection Cylinder arrangement in the above-described configuration from the prior art laterally at least over the second arm (usually over both arms).
  • connection point between the two arms which is also referred to in practice as the clamping point, is at the same time the point of the highest bending moment in the (second) arm, so that, among other things, at the point of the highest occurring bending moment also the torque must be initiated and absorbed by / when the arm is turned, which in turn leads to considerably higher strength requirements.
  • the object of the present invention is accordingly to improve the boom of the type described in the introduction, in particular while avoiding its aforementioned disadvantages, in particular in such a way that - with fundamentally the same (front paragraph) kinematics as are present in the boom described at the beginning on the prior art - a (considerably) smaller side profile can be achieved, both (and in particular) in a side plan view and in a plan view (projection) from above, in order in this way inter alia to enable work under difficult conditions without any problems, as is common in earthworks, with the boom very often having to be passed between shoring elements such as strut bars, which in some cases in the prior art. was not possible at all and often led to damage to the piston-cylinder arrangement.
  • the solution to this problem is characterized in that the piston-cylinder arrangement runs at least partially - preferably essentially completely - within the first arm, and in order to achieve an even greater protective effect for the piston-cylinder arrangement preferably such that the Piston-cylinder arrangement is articulated on the device frame or on the second arm so that the cylinder (s) are at the top and the piston rod (s) are at the bottom.
  • the piston-cylinder arrangement is preferably articulated on the underside of the second arm, and preferably in such a way that it runs essentially parallel to the longitudinal axis of the first arm.
  • the drawing shows a generally designated 1 backhoe with an overall designated 2 boom, which - as far as the explanation of the above invention is concerned - consists essentially of two articulated (first and second) arms 3 and 4, respectively can be pivoted relative to one another by means of a piston-cylinder arrangement 5, the piston-cylinder arrangement 5 consisting of two piston-cylinder units 6 running parallel to one another, of which only one piston-cylinder unit can be seen in each of the two drawing figures is.
  • the boom 2 per se has yet another (third) arm 7, which is connected in an articulated manner to the front end section of the second arm 4 and has the (deep) bucket 8 at its free end wearing.
  • this third arm 7 is irrelevant to the present invention and is therefore essentially not considered in the following.
  • the articulation point 14 of the piston-cylinder arrangement 5 on the second arm 4 is arranged at a distance a from the articulation point 15 of the second arm 4 on the first arm 3.
  • the piston-cylinder arrangement 5 consisting of two piston-cylinder units 6, 6 which are parallel to one another is practically integrated into the first arm 3, that is to say is arranged essentially completely within the first arm 3 and runs essentially parallel to the longitudinal axis of the first arm 3, the piston-cylinder arrangement 5 being arranged recognizably on the underside 16 of the second arm 4, namely the two piston-cylinder units 6, 6 are each on a nose-shaped extension 17 of a side wall 18 of the second arm 4 articulated.
  • the articulation point 19 of the piston-cylinder arrangement 5 on the first arm 3 is located just above the articulation point 9 of the first arm 3 on the device frame 10.
  • the piston-cylinder arrangement 5 is articulated on the first arm 3 or on the second arm 4 in such a way that the two cylinders 5 'are each at the top and the piston rods 5''are at the bottom, so that the piston-cylinder arrangement 5 is not only is already excellently protected by its proposed integration into the first arm 3 of the arm 2, but also also such that (see FIG. 2) in cases where the piston-cylinder units 6, 6 (slightly) freely between the first arm 3 and the second arm 4 project (see Fig. 2), this free section is a cylinder section and not a piston rod section.
  • the present invention has created a cantilever which - while avoiding all the disadvantages of the prior art - takes account of the requirements to be met of it in an almost optimal manner: the cantilever according to the invention does not have only in top view from the side, but also in top view from above or in the projection an extremely small side profile, so that it can work without difficulty even under difficult conditions, such as are common in earthworks, but it is also strength-wise ideally designed to the extent that the greatest bending moment does not occur at the junction between the first and second arm 3 or 4 of the arm 2, where, in addition, the torques also have to be introduced when turning; and finally, owing to the arrangement of the piston-cylinder arrangement 5 which is at least essentially integrated into the first arm 3 (“pillar”), an almost optimal protection of the piston-cylinder arrangement 5 against any external influences is achieved, although the - compared to one "Neck cylinder arrangement" - advantageous effect is retained, as set out at the beginning with reference to the previously described prior art.

Landscapes

  • 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)
  • Earth Drilling (AREA)

Claims (5)

  1. Flèche (2) pour un excavateur (1), comprenant une flèche hydraulique réglable (3, 4) constituée d'un premier bras (3), qui est articulé par l'une de ses parties extrêmes (en 9) sur le bâti (10) de l'engin, qui prend appui sur celui-ci au moyen d'un premier ensemble pistons-cylindres et qui peut pivoter par rapport à celui-ci, et d'un deuxième bras (4) qui est articulé par son autre partie extrême (en 15) et qui est coudé par rapport au premier bras, les deux bras (3, 4) pouvant pivoter l'un par rapport à l'autre au moyen d'un ensemble pistons-cylindres (5) qui, dans le sens de la marche, se trouve devant la ligne de jonction entre les deux points d'articulation (9, 15) du premier bras (3) et dont le point d'articulation (14) sur le deuxième bras (4) se trouve à distance, dans le sens de la marche, devant le point d'articulation (15) des deux bras (3, 4), et comprenant un troisième bras (17) qui est articulé à l'extrémité libre de la flèche réglable (3, 4), qui peut pivoter par rapport au deuxième bras (4) de la flèche réglable (3, 4) au moyen d'un troisième ensemble pistons-cylindres, et à l'extrémité extrême libre duquel est articulé le godet (8), caractérisée en ce que le deuxième ensemble pistons-cylindres (5) agissant entre les deux bras (3, 4) de la flèche réglable est disposé sensiblement entièrement à l'intérieur du premier bras (3) et - en s'étendant dans le sens longitudinal du premier bras (3) - est articulé sur le dessous (16) du deuxième bras (4) par son extrémité opposée au premier bras (3).
  2. Flèche selon la revendication 1, caractérisée en ce qu'au point d'articulation du deuxième ensemble pistons-cylindres (5), les parois latérales (18, 18) du deuxième bras (4) sont prolongées vers le bas (en 17) en forme de talons.
  3. Flèche selon la revendication 1 ou 2, caractérisée en ce que le point d'articulation (19) du deuxième ensemble pistons-cylindres (5) sur le premier bras (3) se trouve juste au-dessus de son point d'articulation (9) sur le bâti (10) de l'engin.
  4. Flèche selon une ou plusieurs des revendications précédentes, en particulier la revendication 3, caractérisée en ce que le deuxième ensemble pistons-cylindres (5) se compose, de manière connue, de deux unités piston-cylindre (6, 6) s'étendant sensiblement parallèlement l'une à l'autre.
  5. Flèche selon une ou plusieurs des revendications précédentes, caractérisée en ce que le deuxième ensemble pistons-cylindres (5) est articulé sur le premier bras (3) et sur le deuxième bras (4), de façon que le(s) cylindre(s) (5') se trouve(nt) en haut et que la (les) tige(s) de piston(s) (5'') se trouve(nt) en bas.
EP90250314A 1990-03-27 1990-12-18 Flèche pour un excavateur ou similaire Expired - Lifetime EP0448849B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9003519U DE9003519U1 (fr) 1990-03-27 1990-03-27
DE9003519U 1990-03-27
DE9006068U DE9006068U1 (fr) 1990-03-27 1990-05-26
DE9006068U 1990-05-26

Publications (2)

Publication Number Publication Date
EP0448849A1 EP0448849A1 (fr) 1991-10-02
EP0448849B1 true EP0448849B1 (fr) 1994-11-09

Family

ID=25956422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250314A Expired - Lifetime EP0448849B1 (fr) 1990-03-27 1990-12-18 Flèche pour un excavateur ou similaire

Country Status (3)

Country Link
EP (1) EP0448849B1 (fr)
AT (1) ATE114011T1 (fr)
ES (1) ES2063910T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69514699T2 (de) * 1994-03-07 2000-05-31 Hitachi Construction Machinery Schwenkbagger
DE10321070B3 (de) * 2003-05-10 2004-11-04 O & K Orenstein & Koppel Gmbh Geteilter Auslegearm für Bagger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042233A (en) * 1958-12-15 1962-07-03 Koehring Co Multiple joint backhoe
EP0226657B1 (fr) * 1985-12-23 1990-01-31 Kabushiki Kaisha Komatsu Seisakusho Dispositif pour manoeuvrer un outil d'une excavatrice

Also Published As

Publication number Publication date
EP0448849A1 (fr) 1991-10-02
ES2063910T3 (es) 1995-01-16
ATE114011T1 (de) 1994-11-15

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