EP3456887B1 - Flèche de pelle et pelle excavatrice - Google Patents

Flèche de pelle et pelle excavatrice Download PDF

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Publication number
EP3456887B1
EP3456887B1 EP18194014.9A EP18194014A EP3456887B1 EP 3456887 B1 EP3456887 B1 EP 3456887B1 EP 18194014 A EP18194014 A EP 18194014A EP 3456887 B1 EP3456887 B1 EP 3456887B1
Authority
EP
European Patent Office
Prior art keywords
boom
plates
accordance
bearing plate
bearing
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.)
Active
Application number
EP18194014.9A
Other languages
German (de)
English (en)
Other versions
EP3456887A1 (fr
Inventor
Guillaume Elbel
Thomas Münch
Pascal FRITSCH
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.)
Liebherr France SAS
Original Assignee
Liebherr France SAS
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Filing date
Publication date
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Publication of EP3456887A1 publication Critical patent/EP3456887A1/fr
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Publication of EP3456887B1 publication Critical patent/EP3456887B1/fr
Active legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/125—Locking devices
    • 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
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • 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
    • 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
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/14—Booms only for booms with cable suspension arrangements; Cable suspensions
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures
    • E02F9/0825—Cast frame structure

Definitions

  • the invention relates to a boom for an earth moving machine, in particular an excavator, with at least two bearing plates for mounting a cylinder unit, these running at least largely parallel to one another in the longitudinal direction of the boom.
  • the object of the present invention consists in the search for possible solutions to problems in the design of the bearing points for cantilever structures of the generic type.
  • boom according to the features of claim 1.
  • Advantageous configurations of the boom are the subject of the dependent claims.
  • the term boom is used comprehensively. For example, it also includes a so-called style.
  • the bearing plate (s) be designed with a curvature extending outward at the end toward the side edge of the outer boom.
  • the invention applies both to boom designs with only one bearing plate and to such designs with two or more bearing plates.
  • the invention and its advantageous embodiments are always described below using an embodiment with two bearing plates, but the following explanations apply equally to a cantilever design with only one or more than two bearing plates.
  • At least one bearing plate or both bearing plates are guided at the end to the edge of the top side of the boom and adjoin the edge of the boom surface formed with the side faces. It is also provided here that the top side of the boom is widened in the area of the outwardly running bearing plates, ie the entire boom profile is made wider in the area of the at least one or the adjacent bearing plates so that the latter are extended beyond the original edge between the surface and the side part and on the extended boom area, ie the lateral extension of the boom are positioned. This design means that the ends of the bearing plates are less stressed.
  • the bearing plate (s) can be fastened standing vertically on the top side of the boom.
  • the boom can be composed of a rear and a front boom part in a materially bonded manner to form a boomerang-like boom structure, but the invention can in principle be used for any boom structure.
  • bearing plates extend outwards with an identical radius of curvature in each case. However, it is also conceivable to provide individual bearing plates with different radii of curvature.
  • the proposed bearing plate or plates are used to support a cylinder which is used to actuate an attachment and / or a boom extension mounted on the boom.
  • the corresponding attachment can additionally have a corresponding boom extension, a corresponding cylinder unit then being used to actuate the boom extension.
  • the curvature of the bearing plate or plates directly adjoins a pin receptacle of the bearing plate.
  • Corresponding bearing plates are usually formed by a bearing plate which, in the area of the widest point, provides a suitable bore for receiving a bearing pin.
  • the width of the bearing plates can usually be continuously reduced in the direction of the boom foot. In the direction of the boom tip, there is preferably a sudden reduction in the sheet metal width, with the bearing sheet metal reduced in width is then guided with a corresponding radius of curvature outwards to the edge of the boom surface.
  • the boom construction is composed of at least one front and at least one rear boom part.
  • the bearing plate (s) can extend, for example, at least for the most part on the top side of the boom top of the front boom part.
  • at least one upper connecting plate can be provided in the connecting area between the boom parts, which ideally represents a part of the boom top in the connecting area of the boom parts.
  • the connecting plate provides a suitable curvature depending on the angle of the two boom parts to one another.
  • the bearing plates extend from the boom top of the front boom part to the upper connecting plate.
  • the bearing plates which are usually welded to the boom parts, then extend at the end into a less stressed boom area on the connecting plate.
  • the weld seams required there are therefore subject to less stress, which has a positive effect on their resistance to fatigue. An otherwise necessary post-treatment of the weld seams could be dispensed with.
  • the present invention also relates to an earthmoving machine, in particular an excavator with at least one boom according to the present invention.
  • the advantages and properties of the earth moving machine therefore obviously correspond to the advantages and properties already discussed in connection with the excavator boom according to the invention, which is why a repetitive description is dispensed with at this point.
  • the perspective side view of the Figure 1 shows the overall structure of the excavator boom 10 according to the invention. This consists of a front boom part 11 and a rear boom part 12. Connection points 34 are provided on the front boom part for the movable mounting of an attachment or a boom extension, not shown here.
  • the rear boom section 12 comprises corresponding bearing points 16 at the end in order to be able to link it to an excavator superstructure or undercarriage such that it can be luffed.
  • Both the rear and the front boom part can be made as a monoblock. However, it is also possible to assemble the boom parts 11, 12 from individual elements.
  • Both boom parts 11, 12 have a box-shaped structure which is obtained by welding corresponding side plates.
  • the individual side plates 11a to 11d or 12a to 12d are welded to one another by fillet weld welding.
  • the connection between the two cantilever parts 11, 12 is created by the central connecting plate 13, at least the front edges of the side plates 11a, 11b and 12a, 12b and possibly the undersides 11d and 12d being firmly connected to one another via the connecting plate 13.
  • the connecting plate 13 has a curved shape, as a result of which a curved contact edge of the boom parts 11, 12 also extends along the side plates 11a, 11b, 12a, 12b results.
  • the connecting plate 13 is designed as a simple, thick plate. It allows a simple connection between the boom parts 11, 12 and, accordingly, a simple adaptation to the desired angle that the two boom elements 11, 12 form.
  • the boom surfaces 11c and 12c of the boom parts 11, 12 are not directly connected to one another. Instead, a plate-shaped upper connecting plate 15 is inserted or placed overlapping on the upper sides 11c, 12c, and welded to the two bracket parts 11, 12.
  • the plate-shaped upper connecting plate 15 is bent in accordance with the angle that the two arm parts 11, 12 form with respect to one another. If necessary, the underside of the boom could also be designed with a corresponding connecting element.
  • a cylindrical tube 21 extends transversely to the boom longitudinal axis through the boom box 12 and is welded onto the central connecting plate 13.
  • the application of the bearing tube 21 to the central connecting plate 13 at the same time ensures that the overall rigidity of the boom can also be increased.
  • a suitable bolt can be inserted into the cylinder tube 21 via outlet openings 21a, 21b within the side elements 12a, 12b.
  • additional reinforcement plates 22 are also attached to the outside of the side plates 12a, 12b.
  • the tube 21 forms the bearing point for connecting a luffing cylinder of the excavator according to the invention, which extends from the bearing point 21 of the rear boom part 12 to the upper carriage of the excavator.
  • the bearing point 30 consists of two parallel bearing plates 30a, 30b, which are perpendicular to the top side of the boom and run parallel in the longitudinal direction of the boom. In the area with the greatest width, a respective bore 31a, 31b is provided for receiving bolts, the edge of the bore being reinforced with additional metal sheets 32.
  • the width of the bearing plates 30a, 30b decreases steadily in the direction of the rear boom part 12.
  • the majority of the bearing plates including the bores 31a, 31b is arranged on the upper side 11a of the front boom part 11, but both plates 30a, 30b extend parallel to the upper connecting plate 15, to which the plate ends are welded.
  • the extension of the bearing plates 30a, 30b up to the connecting plate 15 has the advantage that the end of the weld seam that is formed lies in a region of the boom that is less stressed by force, which not only increases the fatigue resistance, but also enables manufacturing costs to be reduced If no additional treatment of the weld seam is necessary.
  • the width of the bearing plates 30a, 30b decreases abruptly after the bore 31a, 31b in the direction of the boom tip and then remains almost constant.
  • These bearing plate sections 33a, 33b with a reduced but almost constant width have a curvature so that the plate sections 33a, 33b do not protrude parallel to one another, but rather outwardly to the edges of the surface 11c of the front boom part 11.
  • the upper plate 11a of the front boom part 11 can be widened in the area of the bearing plate sections 33a, 33b adjoining the edge, so that the sheet metal elements 33a, 33b can protrude beyond the actual edge of the front boom part.
  • the bearing plates 30a, 30b By bending the bearing plates 30a, 30b, the overall rigidity of the bearing can be increased, but without the strength of the bearing plates 30a, 30b to have to increase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Jib Cranes (AREA)
  • Component Parts Of Construction Machinery (AREA)

Claims (12)

  1. Flèche (10) pour un engin de terrassement, en particulier une pelle excavatrice, comprenant une ou plusieurs tôles de support pour le logement d'un ensemble vérin,
    caractérisée en ce que
    au moins une tôle de support (30a, 30b) présente une courbure (33a, 33b) côté extrémité, qui s'étend vers l'extérieur vers le bord latéral de la flèche, le côté supérieur de la flèche est élargi dans la zone de la ou des tôles de support qui s'étendent vers l'extérieur et la ou les tôles de support s'étendent jusqu'au côté supérieur élargi de la flèche.
  2. Flèche selon la revendication 1, caractérisée en ce que, dans le cas d'au moins deux tôles de support, celles-ci s'étendent au moins en grande partie parallèlement l'une à l'autre dans le sens longitudinal de la flèche.
  3. Flèche selon la revendication 1 ou 2, caractérisée en ce qu'au moins une tôle de support est fixée perpendiculairement à la verticale sur le côté supérieur de la flèche, la flèche étant de préférence composée d'une partie de flèche arrière (12) et d'une partie de flèche avant (11) assemblées par liaison de matière pour former une structure de flèche semblable à un boomerang.
  4. Flèche selon l'une des revendications 1 à 3, caractérisée en ce que plusieurs tôles de support s'étendent respectivement avec un rayon de courbure identique vers l'extérieur.
  5. Flèche selon l'une des revendications précédentes, caractérisée en ce que la ou les tôles de support sont prévues pour le logement d'un vérin destiné à l'actionnement d'un outil porté et/ou d'une extension de flèche.
  6. Flèche selon l'une des revendications précédentes, caractérisée en ce que la zone d'extrémité de la ou des tôles de support qui s'étend vers la pointe de la flèche comporte la courbure.
  7. Flèche selon l'une des revendications précédentes, caractérisée en ce que la zone de tôle directement contiguë à un logement de boulon (31a, 31b) de la ou des tôles de support s'étend vers l'extérieur.
  8. Flèche selon l'une des revendications précédentes, caractérisée en ce que la ou les tôles de support s'étendent au moins en grande partie sur le côté supérieur de la flèche de la partie de flèche avant.
  9. Flèche selon l'une des revendications précédentes, caractérisée en ce que les parties de flèche avant et arrière sont reliées au moins dans certaines zones directement l'une à l'autre et une liaison est prévue en complément entre les parties de flèche avant et arrière au moyen d'au moins une tôle de liaison supérieure (15), la ou les tôles de support s'étendant du côté supérieur de la flèche de la partie de flèche avant jusqu'à la tôle de liaison, la ou les tôles de support se terminant idéalement sur la tôle de liaison supérieure.
  10. Flèche selon la revendication 9, caractérisée en ce que la largeur de la ou des tôles de support est réduite depuis le logement de boulon en direction du segment de flèche arrière, et en particulier diminue en continu dans cette direction.
  11. Flèche selon l'une des revendications précédentes, caractérisée en ce que la largeur de la ou des tôles de support diminue brusquement après le logement de boulon en direction de la pointe de la flèche.
  12. Engin de terrassement, en particulier pelle excavatrice, comprenant au moins une flèche selon l'une des revendications précédentes.
EP18194014.9A 2017-09-15 2018-09-12 Flèche de pelle et pelle excavatrice Active EP3456887B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017121516.6A DE102017121516A1 (de) 2017-09-15 2017-09-15 Baggerausleger und Bagger

Publications (2)

Publication Number Publication Date
EP3456887A1 EP3456887A1 (fr) 2019-03-20
EP3456887B1 true EP3456887B1 (fr) 2021-06-09

Family

ID=63579054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18194014.9A Active EP3456887B1 (fr) 2017-09-15 2018-09-12 Flèche de pelle et pelle excavatrice

Country Status (5)

Country Link
US (1) US10378182B2 (fr)
EP (1) EP3456887B1 (fr)
CN (1) CN109505319B (fr)
DE (1) DE102017121516A1 (fr)
ES (1) ES2887347T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017110412B4 (de) * 2017-05-12 2020-06-10 Liebherr-Werk Ehingen Gmbh Teleskopausleger und Mobilkran
DE102017121518A1 (de) * 2017-09-15 2019-03-21 Liebherr-France Sas Baggerausleger und Bagger
DE102019116394A1 (de) * 2019-06-17 2020-12-17 Liebherr-France Sas Baggerstiel

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
JPS5151687Y2 (fr) * 1972-06-20 1976-12-10
US4069637A (en) 1976-08-09 1978-01-24 Caterpillar Tractor Co. Tubular section boom
JPS6376057U (fr) * 1986-11-07 1988-05-20
JPH06220884A (ja) * 1993-01-21 1994-08-09 Yanmar Diesel Engine Co Ltd バックホーのブーム構造
KR100320575B1 (ko) * 1996-01-31 2002-04-22 세구치 류이치 굴삭기계
US5993139A (en) * 1997-06-30 1999-11-30 Caterpillar Inc. Box boom lift arm assembly
JP3765233B2 (ja) 1997-07-15 2006-04-12 株式会社小松製作所 バケット式掘削機のブーム及びその製造方法
JP2002364017A (ja) * 2001-06-05 2002-12-18 Shin Caterpillar Mitsubishi Ltd 建設機械におけるブーム構造
JP4566935B2 (ja) * 2006-03-13 2010-10-20 ヤンマー株式会社 掘削作業機のブーム
WO2008133244A1 (fr) * 2007-04-25 2008-11-06 Komatsu Ltd. Flèche de machine de travail
JP5101458B2 (ja) * 2008-10-28 2012-12-19 住友重機械工業株式会社 建設機械のアタッチメント
CN103403263B (zh) * 2011-04-20 2015-06-10 日立建机株式会社 工程机械用起重臂
JP5932541B2 (ja) 2011-09-30 2016-06-08 オリンパス株式会社 ズームレンズ、それを用いた撮像装置、映像伝送装置及び映像伝送システム
JP2016089375A (ja) * 2014-10-30 2016-05-23 日立建機株式会社 建設機械用ブーム

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
CN109505319A (zh) 2019-03-22
CN109505319B (zh) 2022-07-12
EP3456887A1 (fr) 2019-03-20
US20190085533A1 (en) 2019-03-21
US10378182B2 (en) 2019-08-13
ES2887347T3 (es) 2021-12-22
DE102017121516A1 (de) 2019-03-21

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