EP0448849A1 - Flèche pour un excavateur ou similaire - Google Patents

Flèche pour un excavateur ou similaire Download PDF

Info

Publication number: EP0448849A1
Authority: EP; European Patent Office
Prior art keywords: arm; piston; cylinder arrangement; boom; cylinder
Prior art date: 1990-03-27
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP90250314A

Other languages

German (de)

English (en)

Other versions

EP0448849B1 (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.)

1990-03-27

Filing date

1990-12-18

Publication date

1991-10-02

1990-03-27 Priority claimed from DE9003519U external-priority patent/DE9003519U1/de

1990-12-18 Application filed by Atlas Weyhausen GmbH filed Critical Atlas Weyhausen GmbH

1991-10-02 Publication of EP0448849A1 publication Critical patent/EP0448849A1/fr

1994-11-09 Application granted granted Critical

1994-11-09 Publication of EP0448849B1 publication Critical patent/EP0448849B1/fr

2010-12-18 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000005452 bending Methods 0.000 description 4
230000000694 effects Effects 0.000 description 1
230000010354 integration Effects 0.000 description 1
230000001681 protective effect Effects 0.000 description 1
230000000717 retained effect Effects 0.000 description 1

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
- E02F3/30—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 in terms of its regularly hydraulically operated piston-cylinder arrangement in practice also known as “hydraulic adjustable boom” is known, in which the piston-cylinder arrangement according to the task to be mastered (or driving position) for stretching or serves to shorten the (entire) boom and is arranged on the front or underside of the boom, in such a way that the piston-cylinder arrangement consisting of two parallel, hydraulic piston-cylinder units at one end at one front lateral section of the first cantilever arm (laterally) is articulated, while at its other end (with the two piston rods) is articulated laterally on 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 at the connection point 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) as well as in the working positions, the piston-cylinder arrangement forms a triangle with the mutually facing sections of the two arms, and the piston-cylinder units of the pistons are also in plan view or projection -Cylinder arrangement in the above-described design 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 also the point of the highest bending moment in the (second) arm, so that, among other things, the position of the highest occurring bending moment also the torque must be initiated and absorbed by / when twisting the arm, 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 (significantly) 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 they are common in earthworks, with the boom very often having to be passed between shoring elements such as strut bars, which in the prior art is partly the case. 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, 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 a generally designated 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 has a further (third) arm 7 per se, which is articulated 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 through their integration according to the invention into the first arm 3 of the arm 2 is already outstandingly protected, but moreover also such that (see FIG. 2) in cases in which the piston-cylinder units 6, 6 are (slightly) free between the first arm 3 and the second arm 4 protrude (see Fig. 2), this free section is a cylinder section and not a piston rod section.
the present invention has created a boom which - while avoiding all the disadvantages of the prior art - takes the requirements placed on it in an almost optimal manner: the boom 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 almost common in earthworks, but it is also already firm 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, due 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 was initially set out 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)

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 (de)	1990-03-27	1990-03-27	Ausleger für einen Löffelbagger od.dgl.
DE9003519U		1990-03-27
DE9006068U DE9006068U1 (de)	1990-03-27	1990-05-26	Ausleger für einen Löffelbagger od.dgl.
DE9006068U		1990-05-26

Publications (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0671511A3 (fr) *	1994-03-07	1996-02-14	Hitachi Construction Machinery	Pelle du type pivotant.
WO2004101901A1 (fr) *	2003-05-10	2004-11-25	Cnh Baumaschinen Gmbh	Fleche divisee pour excavateur

Citations (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
EP0226657A1 (fr) *	1985-12-23	1987-07-01	Kabushiki Kaisha Komatsu Seisakusho	Dispositif pour manoeuvrer un outil d'une excavatrice

1990
- 1990-12-18 AT AT90250314T patent/ATE114011T1/de not_active IP Right Cessation
- 1990-12-18 ES ES90250314T patent/ES2063910T3/es not_active Expired - Lifetime
- 1990-12-18 EP EP90250314A patent/EP0448849B1/fr not_active Expired - Lifetime

Patent Citations (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
EP0226657A1 (fr) *	1985-12-23	1987-07-01	Kabushiki Kaisha Komatsu Seisakusho	Dispositif pour manoeuvrer un outil d'une excavatrice

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 6 (M-445)[2063], 11. Januar 1986; & JP-A-60 168 828 (HANDOOZAA KOGYO K.K.) 02-09-1985 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0671511A3 (fr) *	1994-03-07	1996-02-14	Hitachi Construction Machinery	Pelle du type pivotant.
WO2004101901A1 (fr) *	2003-05-10	2004-11-25	Cnh Baumaschinen Gmbh	Fleche divisee pour excavateur
JP2006528292A (ja) *	2003-05-10	2006-12-14	ツェーエヌハー・バウマシイネン・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング	分割されたブームアーム
US7549242B2 (en)	2003-05-10	2009-06-23	Cnh Baumaschinen Gmbh	Multiple boom for excavators

Also Published As

Publication number	Publication date
EP0448849B1 (fr)	1994-11-09
ES2063910T3 (es)	1995-01-16
ATE114011T1 (de)	1994-11-15

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1991-08-15	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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