EP2077356A1 - Gelenkarm für Maschinen - Google Patents

Gelenkarm für Maschinen Download PDF

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Publication number
EP2077356A1
EP2077356A1 EP07425848A EP07425848A EP2077356A1 EP 2077356 A1 EP2077356 A1 EP 2077356A1 EP 07425848 A EP07425848 A EP 07425848A EP 07425848 A EP07425848 A EP 07425848A EP 2077356 A1 EP2077356 A1 EP 2077356A1
Authority
EP
European Patent Office
Prior art keywords
arm
hinge
connecting valve
axis
elongated portion
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
Application number
EP07425848A
Other languages
English (en)
French (fr)
Other versions
EP2077356B1 (de
Inventor
Mauro Viretto
Gianni Luchetti
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.)
New Holland Kobelco Construction Machinery SpA
Original Assignee
New Holland Kobelco Construction Machinery SpA
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
Application filed by New Holland Kobelco Construction Machinery SpA filed Critical New Holland Kobelco Construction Machinery SpA
Priority to EP20070425848 priority Critical patent/EP2077356B1/de
Publication of EP2077356A1 publication Critical patent/EP2077356A1/de
Application granted granted Critical
Publication of EP2077356B1 publication Critical patent/EP2077356B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2275—Hoses and supports therefor and protection therefor

Definitions

  • the present invention relates to an articulated arm for machines in general, and for excavators in particular.
  • excavators comprise an articulated arm, an elongated end portion of which is hinged at one end to an intermediate connecting portion of the articulated arm, and is fitted at the other end with a bucket.
  • the bucket of most excavators is replaceable with accessory implements, such as wrecking devices, grippers, etc., which, however, require an additional hydraulic connecting point for connection to the hydraulic control system of the excavator.
  • the arm has an additional hydraulic circuit comprising a feed pipe, and a hydraulic connecting valve for connecting the accessory implements.
  • the hydraulic connecting valve is connected integrally to the elongated end portion by a supporting bracket connected firmly to the connecting valve and to the end portion by means of screws.
  • the pipe is connected at one end to the user-operated hydraulic distributor, and at the other end to the hydraulic connecting valve, and comprises, at the hinge point between the end and intermediate portions of the arm, a length of hose made of elastomeric material, terminating at the hydraulic connecting valve, and designed to form a number of elastically deformable loops.
  • hoses used normally project beyond the bottom edge of the articulated arm, with the result that, when the arm is operating in the lowered position, the hose often knocks against, drags along, or is caught up by the material being removed, thus resulting in rapid wear of the hose and, at times, even severing of the hose when the arm is raised.
  • an articulated arm for machines comprising at least one elongated portion hinged to rotate about a hinge axis with respect to an adjacent connecting portion; and an additional hydraulic circuit for feeding hydraulic fluid to accessory implements connectable to the articulated arm; said additional hydraulic circuit comprising hydraulic connecting valve means for hydraulically connecting said accessory implements, and connecting means for connecting said connecting valve means to said elongated portion; characterized in that said connecting means comprise hinge means to permit rotation of said connecting valve means about a rotation axis parallel to said hinge axis.
  • the hinge means of the articulated arm defined above preferably comprise a bracket connected integrally to said connecting valve means; and a hinge pin extending through said bracket coaxially with said rotation axis and connected integrally to said elongated portion.
  • Said additional hydraulic circuit preferably also comprises a flexible pipe portion extending at least partly at said hinge axis; said flexible pipe portion being located inside a space defined at the bottom by a surface parallel to said hinge axis and through a bottom peripheral edge of said arm, regardless of the operating position of said elongated portion.
  • Number 1 in Figure 1 indicates as a whole a machine, in particular a self-propelled earthmoving machine.
  • Machine 1 comprises a known articulated arm 2, in turn comprising an elongated intermediate connecting portion 3, and an elongated end portion 4.
  • Elongated end portion 4 is hinged to elongated intermediate portion 3 by a hinge pin 5 to rotate, with respect to intermediate portion 3, about a substantially horizontal hinge axis 6 perpendicular to elongated portions 3 and 4.
  • a bucket 7 is hinged to a free end of elongated end portion 4, is operated by a respective hydraulic jack 8 connected to a main hydraulic circuit 9 of the machine, and may be replaced with accessory implements, such as wrecking devices, grippers, etc., shown schematically and indicated as a whole by 12, to perform different operations with the same machine.
  • accessory implements such as wrecking devices, grippers, etc., shown schematically and indicated as a whole by 12, to perform different operations with the same machine.
  • accessory implements 12 are operated by respective hydraulic actuators (not shown) connected hydraulically to an additional hydraulic circuit indicated as a whole by 15.
  • Additional hydraulic circuit 15 is fitted at least partly to elongated portions 3 and 4, and comprises a connecting valve 16 fitted to elongated end portion 4; and a hydraulic-fluid feed pipe 18 connected at one end in known manner to a known user-operated hydraulic distributor (not shown), and at the other end to an inlet of connecting valve 16.
  • Feed pipe 18 comprises a rigid portion 19 extending along, and connected firmly in known manner to, intermediate portion 3; and a flexible end portion 20, defined by a hose, which extends at hinge axis 6, and is connected in fluidtight manner at one end to rigid portion 19, and at the other end directly to the inlet of connecting valve 16.
  • connecting valve 16 comprises an outer casing 22 connected firmly, e.g. by means of screws 23, to one leg 24 of an L-shaped supporting bracket 25, the other leg 26 of which extends parallel to and facing a lateral wall 27 of elongated end portion 4, and is connected to lateral wall 27 by a hinge assembly 30 to enable rotation of bracket 25, and therefore of connecting valve 16, about a fixed hinge axis 31 parallel to axis 6.
  • hinge assembly 30 comprises a nut screw 33 fitted firmly, e.g. welded, to and projecting from lateral wall 27 coaxially with axis 31; and a screw 34.
  • Screw 34 comprises a threaded shank 35, an end portion of which is screwed inside nut screw 33, and a portion of which, extending from head 36 of the screw, extends through a collar or ring 37 forced by head 36 of the screw against nut screw 33.
  • Collar 37 engages in rotary manner a through hole formed in leg 26, and is of a length, measured parallel to axis 31, approximately equal to but no less than the thickness of leg 26, so that bracket 25 rotates freely with respect to screw 34 and collar 37.
  • hinge assembly 30 allows connecting valve 16 to rotate about axis 31 with respect to end portion 4 of the arm, as end portion 4 rotates with respect to intermediate portion 3. Allowing valve 16 to rotate reduces the forces exerted on both hose 20 and the joints connecting hose 20 to rigid portion 19 and connecting valve 16, thus prolonging the working life of both hose 20 and the joints, and so reducing hydraulic fluid leakage and losses.
  • hose 20 by allowing connecting valve 16 to move with respect to elongated portion 4 of the arm to which it is connected, the length of hose 20 can be reduced considerably as compared with known solutions, so that hose 20 remains completely facing the arm, regardless of the relative position of elongated portions 3 and 4.
  • hose 20 regardless of the angular position of end portion 4 with respect to intermediate portion 3, hose 20 remains at all times inside a space defined at the bottom by a surface parallel to axes 6 and 31 and through a bottom edge 40 of arm 2. That is, hose 20, by never coming into contact with the material or ground below the arm, operates in the best working conditions at all times, with no impairment in its original characteristics and, hence, original efficiency and reliability.
  • connecting valve 16 may be supported by brackets or fastening members other than the bracket described; and hinge assembly 30 may be formed differently from the one shown by way of example, while still allowing at least one rotation of connecting valve 16 with respect to the elongated portion to which it is connected.
  • arm 2 as described herein may obviously form part of any machine other than the earthmoving machine described by way of example.
  • the same problems referred to specifically in connection with earthmoving machines are obviously also encountered in other types of machines featuring articulated lifting, resisting, or supporting arms.
EP20070425848 2007-12-31 2007-12-31 Gelenkarm für Maschinen Active EP2077356B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070425848 EP2077356B1 (de) 2007-12-31 2007-12-31 Gelenkarm für Maschinen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070425848 EP2077356B1 (de) 2007-12-31 2007-12-31 Gelenkarm für Maschinen

Publications (2)

Publication Number Publication Date
EP2077356A1 true EP2077356A1 (de) 2009-07-08
EP2077356B1 EP2077356B1 (de) 2012-08-01

Family

ID=39368192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070425848 Active EP2077356B1 (de) 2007-12-31 2007-12-31 Gelenkarm für Maschinen

Country Status (1)

Country Link
EP (1) EP2077356B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014037707A (ja) * 2012-08-15 2014-02-27 Hitachi Constr Mach Co Ltd 建設機械
KR20170083558A (ko) * 2014-11-14 2017-07-18 케이와이비-와이에스 가부시키가이샤 기기 설치 구조
EP3452401A4 (de) * 2016-05-03 2020-01-15 Ponsse OYJ Anordnung in der hebevorrichtung einer arbeitsmaschine, hebevorrichtung einer arbeitsmaschine und arbeitsmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304077A (en) * 1979-07-16 1981-12-08 Caterpillar Tractor Co. Mounting assembly for hydraulic conduits of a mobile apparatus
DE4007470C1 (en) * 1990-03-09 1991-03-07 O & K Orenstein & Koppel Ag, 1000 Berlin, De Length compensator for hydraulic hose - consists of flexible section with loop between relatively hinged supports
JP2001081808A (ja) * 1999-09-13 2001-03-27 Kobelco Contstruction Machinery Ltd 油圧管の配管構造
JP2002013160A (ja) 2000-06-27 2002-01-18 Nippon Sharyo Seizo Kaisha Ltd 建設機械の油圧配管構造
JP2002250047A (ja) 2001-02-23 2002-09-06 Hitachi Constr Mach Co Ltd 油圧ショベルの配管支持構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304077A (en) * 1979-07-16 1981-12-08 Caterpillar Tractor Co. Mounting assembly for hydraulic conduits of a mobile apparatus
DE4007470C1 (en) * 1990-03-09 1991-03-07 O & K Orenstein & Koppel Ag, 1000 Berlin, De Length compensator for hydraulic hose - consists of flexible section with loop between relatively hinged supports
JP2001081808A (ja) * 1999-09-13 2001-03-27 Kobelco Contstruction Machinery Ltd 油圧管の配管構造
JP2002013160A (ja) 2000-06-27 2002-01-18 Nippon Sharyo Seizo Kaisha Ltd 建設機械の油圧配管構造
JP2002250047A (ja) 2001-02-23 2002-09-06 Hitachi Constr Mach Co Ltd 油圧ショベルの配管支持構造

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014037707A (ja) * 2012-08-15 2014-02-27 Hitachi Constr Mach Co Ltd 建設機械
KR20170083558A (ko) * 2014-11-14 2017-07-18 케이와이비-와이에스 가부시키가이샤 기기 설치 구조
CN107110278A (zh) * 2014-11-14 2017-08-29 Kyb-Ys株式会社 设备安装结构
EP3220005A4 (de) * 2014-11-14 2018-06-06 KYB-YS Co., Ltd. Montagestruktur für eine vorrichtung
US10054138B2 (en) 2014-11-14 2018-08-21 Kyb-Ys Co., Ltd. Device mounting structure
CN107110278B (zh) * 2014-11-14 2019-06-04 Kyb-Ys株式会社 设备安装结构
EP3452401A4 (de) * 2016-05-03 2020-01-15 Ponsse OYJ Anordnung in der hebevorrichtung einer arbeitsmaschine, hebevorrichtung einer arbeitsmaschine und arbeitsmaschine
US11028552B2 (en) 2016-05-03 2021-06-08 Ponsse Oyj Arrangement in the hoisting apparatus of a work machine, hoisting apparatus of a work machine, and work machine

Also Published As

Publication number Publication date
EP2077356B1 (de) 2012-08-01

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