WO1998003739A1 - Dispositif de reduction des chocs au point extreme de la course d'un engin de construction du type a fleche articulee - Google Patents

Dispositif de reduction des chocs au point extreme de la course d'un engin de construction du type a fleche articulee Download PDF

Info

Publication number
WO1998003739A1
WO1998003739A1 PCT/JP1997/002450 JP9702450W WO9803739A1 WO 1998003739 A1 WO1998003739 A1 WO 1998003739A1 JP 9702450 W JP9702450 W JP 9702450W WO 9803739 A1 WO9803739 A1 WO 9803739A1
Authority
WO
WIPO (PCT)
Prior art keywords
boom
angle
flow rate
cylinder
boom cylinder
Prior art date
Application number
PCT/JP1997/002450
Other languages
English (en)
Japanese (ja)
Inventor
Noritaka Nagata
Takeshi Nakamori
Original Assignee
Komatsu Ltd.
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 Komatsu Ltd. filed Critical Komatsu Ltd.
Priority to EP97930798A priority Critical patent/EP0919670A4/fr
Publication of WO1998003739A1 publication Critical patent/WO1998003739A1/fr

Links

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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • 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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2214—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing the shock generated at the stroke end
    • 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
    • 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
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • 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

Definitions

  • the present invention relates to a shovel machine having a plurality of arms, and particularly to a technique for reducing a shock generated when a boom cylinder reaches a stroke end in a shovel machine having a two-piece boom.
  • a two-piece boom type excavator is equipped with two booms (first boom, second boom), an arm and a bucket as working machines.
  • the work equipment (first and second booms) can be folded compactly when self-propelled, transported, and parked.
  • FIGS. 9 and 10 show a power shovel having the new link structure.
  • FIG. 9 shows a working posture when the boom takes a maximum undulation posture
  • FIG. 10 shows a storage posture.
  • the first boom cylinder 2 interferes with the first boom 1 in the retracted posture.
  • the pedestal-side fulcrum b needs to be located ahead of the rotation fulcrum a of the first boom 1
  • the point of action c is the first boom 1 and the 2 Boom 3 needs to be located ahead of the connection point d.
  • the boom cylinder 2 shown by a broken line in FIG. 11 is an example in which the pedestal-side fulcrum b is arranged closer to the rotation fulcrum a of the first boom 1.
  • the first boom cylinder 2 interferes with the first boom 1.
  • the position of the first boom cylinder 2 is limited due to the problem such as the interference. Therefore, it is not possible to secure a sufficiently long cylinder length as compared with a normal mono-boom type.
  • the mechanical shock reduction device 10 shown in FIG. 12 has the drawback that the cylinder length is reduced by the amount of the throttle mechanism because the throttle mechanism 11 is provided in the work machine cylinder. I have.
  • This electronic shock reduction device measures the stroke length of the cylinder of the work equipment cylinder that reduces the shock, and moves the cylinder in the stroke end direction when this measured value approaches the stroke end vicinity.
  • the cylinder speed is reduced by limiting the flow rate of pressurized oil.
  • the two-piece boom type power shovel shown in FIGS. 9 to 11 has a special link structure, so that the first boom angle of the first boom cylinder 2 at the time of the stroke opening of the first boom cylinder 2 is reduced. Cannot be uniquely determined.
  • Fig. 13 shows the state where the first boom cylinder 2 is fixed to the stroke end.
  • the first state shown by a solid line
  • the second state in which the axis u of the first boom cylinder 2 intersects with the pivot point a of the first boom 1 (shown by a broken line)
  • the angle (posture) of the first boom 1 when the first boom cylinder 2 is in the stroke end depends on the extended state of the second boom cylinder 4. Correspondingly, it will change within the range from the angle ⁇ to the angle ⁇ '.
  • Fig. 10 A diagram showing the storage posture of a two-piece boom type power shovel to which the present invention is applied.
  • the second boom cylinder 4 is in the shortest working posture and the first boom cylinder 2 is in the upstroke stroke end.
  • One boom angle is ⁇ . Therefore, in the first embodiment, the angle of the first boom is monitored by the output of the angle detector provided at the pivot point a of the first boom 1, and when the first boom angle approaches ⁇ , The shock at the stroke end of the first boom cylinder 2 is reduced by reducing the amount of oil flowing to the bottom side of the boom cylinder 2.
  • Fig. 2 shows an on / off valve 31 and a throttle valve 32 used in place of the EPC valve 27 in Fig. 1.
  • the on / off command signal output from the computing unit 26 to the on / off valve 31 is shown.
  • the flow rate is limited by the pattern shown in Fig. 5.
  • the angle (posture) of the first boom 1 when the first boom cylinder 2 is in the stroke is set. However, it changes within the range from the position of the angle ⁇ to the position of the angle ⁇ ′ according to the expansion and contraction state of the second boom cylinder 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

Engin de construction du type à flèche articulée permettant de réduire à un faible coût et de façon sûre le choc au point extrême de la course d'un cylindre d'une première flèche, dans lequel une première et une deuxième flèche sont mis en un état de relevage maximum lorsque le cylindre de la première flèche présente une extension maximale tandis que le cylindre de la deuxième flèche présente une extension minimale, et, lorsque le cylindre de la seconde flèche passe d'une position de rangement à une position de fonctionnement, il est rétracté à partir de son état d'extension maximale en position de rangement pour adopter et maintenir une extension minimale en fonctionnement. Ledit engin de construction comprend un moyen de détection de l'angle de la première flèche, un moyen de réglage d'une limite de débit dans lequel a été préalablement mémorisée une valeur représentant un rapport entre l'angle de la première flèche et le débit d'alimentation maximum du cylindre de la première flèche, de sorte que la valeur passe à une valeur minimum dans une plage d'angles prédéterminée comprenant un angle de fin de course défini comme l'angle de la première flèche lorsque les deux flèches sont à l'état de relevage maximal, tandis que la valeur augmente progressivement alors qu'elle s'éloigne de ladite plage d'angles, ainsi qu'un moyen de limitation de débit permettant de limiter le débit de l'huile sous pression alimentant la première soupape de commande dans le sens du levage de la flèche, en fonction des données mémorisées dans ledit moyen de réglage de limite de débit.
PCT/JP1997/002450 1996-07-19 1997-07-15 Dispositif de reduction des chocs au point extreme de la course d'un engin de construction du type a fleche articulee WO1998003739A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97930798A EP0919670A4 (fr) 1996-07-19 1997-07-15 Dispositif de reduction des chocs au point extreme de la course d'un engin de construction du type a fleche articulee

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/190901 1996-07-19
JP19090196A JP3734189B2 (ja) 1996-07-19 1996-07-19 ２ピースブーム型建設機械のストロークエンドショック低減装置

Publications (1)

Publication Number Publication Date
WO1998003739A1 true WO1998003739A1 (fr) 1998-01-29

Family

ID=16265610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/002450 WO1998003739A1 (fr) 1996-07-19 1997-07-15 Dispositif de reduction des chocs au point extreme de la course d'un engin de construction du type a fleche articulee

Country Status (4)

Country Link
EP (1) EP0919670A4 (fr)
JP (1) JP3734189B2 (fr)
KR (1) KR980009676A (fr)
WO (1) WO1998003739A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11884692B2 (en) 2014-04-25 2024-01-30 Translate Bio, Inc. Methods for purification of messenger RNA

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100598111B1 (ko) 2004-12-20 2006-07-07 삼성전자주식회사 레귤레이터 및 이를 사용하여 가스를 공급하는 방법
KR100974275B1 (ko) * 2007-12-17 2010-08-06 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 소 선회식 굴삭기의 붐 충격 완화장치 및 그 제어방법
KR101911090B1 (ko) * 2011-12-27 2018-10-25 두산인프라코어 주식회사 인양력 증대 자세교정 장치
CN102591221B (zh) * 2012-02-07 2014-07-09 三一汽车制造有限公司 控制器、多节臂架设备的控制系统和方法、工程机械设备
KR200475536Y1 (ko) * 2013-12-30 2014-12-09 두산인프라코어 주식회사 관절식 붐 장착 굴삭기의 오토 아이들 해제장치
KR102054666B1 (ko) * 2017-04-06 2020-01-22 두산인프라코어 주식회사 건설 기계의 유량 제어 방법 및 이를 수행하기 위한 시스템

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257703A (ja) * 1988-08-18 1990-02-27 Kobe Steel Ltd 油圧シリンダの制御方法
JPH02253002A (ja) * 1989-03-27 1990-10-11 Hitachi Constr Mach Co Ltd 作業機械の油圧回路
JPH02135779U (fr) * 1989-04-15 1990-11-13
JPH02279838A (ja) * 1989-04-19 1990-11-15 Yutani Heavy Ind Ltd 建設機械の油圧緩衝制御装置
JPH02279841A (ja) * 1989-04-19 1990-11-15 Yutani Heavy Ind Ltd 建設機械の油圧緩衝制御装置
JPH02292420A (ja) * 1989-05-08 1990-12-03 Hitachi Constr Mach Co Ltd 建設機械の故障診断装置
JPH03257229A (ja) * 1990-03-07 1991-11-15 Kubota Corp バックホウの制御装置
JPH0881979A (ja) * 1994-09-09 1996-03-26 Kubota Corp バックホウ

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910673A (en) * 1987-05-29 1990-03-20 Hitachi Construction Machinery Co., Ltd. Apparatus for controlling arm movement of industrial vehicle
JPH07197485A (ja) * 1993-12-28 1995-08-01 Komatsu Ltd 建設機械の作業機制御装置
EP0900886B1 (fr) * 1994-03-07 2004-06-02 Hitachi Construction Machinery Co., Ltd. Pelle du type pivotant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257703A (ja) * 1988-08-18 1990-02-27 Kobe Steel Ltd 油圧シリンダの制御方法
JPH02253002A (ja) * 1989-03-27 1990-10-11 Hitachi Constr Mach Co Ltd 作業機械の油圧回路
JPH02135779U (fr) * 1989-04-15 1990-11-13
JPH02279838A (ja) * 1989-04-19 1990-11-15 Yutani Heavy Ind Ltd 建設機械の油圧緩衝制御装置
JPH02279841A (ja) * 1989-04-19 1990-11-15 Yutani Heavy Ind Ltd 建設機械の油圧緩衝制御装置
JPH02292420A (ja) * 1989-05-08 1990-12-03 Hitachi Constr Mach Co Ltd 建設機械の故障診断装置
JPH03257229A (ja) * 1990-03-07 1991-11-15 Kubota Corp バックホウの制御装置
JPH0881979A (ja) * 1994-09-09 1996-03-26 Kubota Corp バックホウ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0919670A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11884692B2 (en) 2014-04-25 2024-01-30 Translate Bio, Inc. Methods for purification of messenger RNA

Also Published As

Publication number Publication date
EP0919670A1 (fr) 1999-06-02
EP0919670A4 (fr) 2000-04-05
JP3734189B2 (ja) 2006-01-11
JPH1037246A (ja) 1998-02-10
KR980009676A (ko) 1998-04-30

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