EP0450156B1 - Schutzvorrichtung für eine Kolbenstange eines Hydraulikzylinders - Google Patents

Schutzvorrichtung für eine Kolbenstange eines Hydraulikzylinders Download PDF

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Publication number
EP0450156B1
EP0450156B1 EP90122461A EP90122461A EP0450156B1 EP 0450156 B1 EP0450156 B1 EP 0450156B1 EP 90122461 A EP90122461 A EP 90122461A EP 90122461 A EP90122461 A EP 90122461A EP 0450156 B1 EP0450156 B1 EP 0450156B1
Authority
EP
European Patent Office
Prior art keywords
piston rod
protective sleeve
slide ring
cylinder
guided
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
EP90122461A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0450156A1 (de
Inventor
Mario Rieger
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0450156A1 publication Critical patent/EP0450156A1/de
Application granted granted Critical
Publication of EP0450156B1 publication Critical patent/EP0450156B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • 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
    • E02F9/2271—Actuators and supports therefor and protection therefor
    • 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
    • E02F9/24—Safety devices, e.g. for preventing overload
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices

Definitions

  • the invention relates to a protective device according to the preamble of claim 1.
  • a protective device for a hydraulic cylinder of a work vehicle which comprises a piston rod cover, which can be displaced accordingly with the piston according to the working movements of the hydraulic cylinder or the inward and outward movement of the piston rod.
  • a guide on the cylinder housing for displacement takes place via a flat guide on both sides of the cover designed as a half-shell.
  • Such a guided sliding cover is subject to a relatively high susceptibility to malfunction due to the robust operation of work vehicles, since even slight deformations of the cover due to external influences can lead to jamming and thus a function of the hydraulic cylinder is no longer fully guaranteed.
  • a protective device for a hydraulic cylinder which comprises two shell-like protective sleeves which are guided into one another and are guided to one another by means of an angular rail. Furthermore, a further guide for the inner shell is provided on the cylinder housing.
  • a protective cover for a working cylinder is known from the drawing by Hunger 10 673, which covers the cylinder housing up to a plane running through the central axis of the cylinder. The cover is guided on the cylinder housing by means of a narrow sliding piece.
  • the object of the invention is to provide an improved protective device for a piston rod of a hydraulic cylinder, which is robust and ensures protection even after exposure to external influences.
  • the main advantages achieved with the invention are that the shell-like protective sleeve is guided on a slide ring of the cylinder housing and special flat guides according to DE-A 37 31 734 can be omitted, so that even if the protective sleeve is deformed, there is no impediment to the function of the hydraulic cylinder .
  • the slide ring is preferably made of elastic plastic and is held on the cylinder housing by means of a tensioning band and is therefore easy to assemble and replace.
  • the protective sleeve can be freely moved on the slide ring in accordance with the working movements of the hydraulic cylinder. It is not subject to any particular tolerance, so that if the sleeve is damaged, the hydraulic cylinder is impaired and a protective function is guaranteed.
  • the protective device 1 for a hydraulic cylinder 2 essentially comprises a shell-like protective sleeve 4 which partially covers the piston rod 3 of the hydraulic cylinder .
  • the shell-like protective sleeve 4 is firmly connected to a holder 9, which in turn can be pivoted between legs 10 of the bearing eye 7 about a horizontal axis 11.
  • the protective sleeve 4 encloses an area of the cylinder housing 12 and the piston rod 3 exposed during working movements. It is mainly protected from above, i.e. against external influences acting in the direction of the arrow 14.
  • This slide ring 15 consists of elastic plastic and is clamped to the housing 12 by means of a tensioning band 16, as shown in FIG.
  • the sliding ring 15 has tangential bevels 17 on its circumference, which are designed to make the ring 15 flexible and to reduce the friction between the protective sleeve 4 and the sliding ring 15.
  • the shell-like protective sleeve 4 has a continuous slot 19 in the lower region 18, which forms a free space for the screw 20 of the tensioning strap 16 and for a pressure line 21 of the hydraulic cylinder 2.
  • the protective sleeve 4 slides on the slide ring 15 and holds the sensitive surface of the piston rod 3 against objects falling from above in the direction of the arrow 14, e.g. Stones and the like are protected over the entire work area.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP90122461A 1990-03-30 1990-11-26 Schutzvorrichtung für eine Kolbenstange eines Hydraulikzylinders Expired - Lifetime EP0450156B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4010225A DE4010225A1 (de) 1990-03-30 1990-03-30 Schutzvorrichtung fuer eine kolbenstange eines hydraulikzylinders
DE4010225 1990-03-30

Publications (2)

Publication Number Publication Date
EP0450156A1 EP0450156A1 (de) 1991-10-09
EP0450156B1 true EP0450156B1 (de) 1996-03-27

Family

ID=6403399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122461A Expired - Lifetime EP0450156B1 (de) 1990-03-30 1990-11-26 Schutzvorrichtung für eine Kolbenstange eines Hydraulikzylinders

Country Status (6)

Country Link
US (1) US5152351A (no)
EP (1) EP0450156B1 (no)
JP (1) JPH04222725A (no)
AT (1) ATE136082T1 (no)
DE (2) DE4010225A1 (no)
NO (1) NO175649C (no)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386652A (en) * 1993-11-12 1995-02-07 Allied Gator, Inc. Cylinder guard
US5383563A (en) * 1994-02-10 1995-01-24 Caterpillar Inc. Outrigger and guard assembly
US6843005B2 (en) * 2002-11-14 2005-01-18 Rockland, Inc. Grappling attachment for excavating machines and the like
US6659194B1 (en) * 2002-11-22 2003-12-09 Samuel C. Thompson Blade angle adjustment system
ITRM20030438A1 (it) * 2003-09-24 2005-03-25 Jolly Drive S R L Dispositivo di protezione dalla vegetazione marina
KR100723579B1 (ko) * 2004-05-04 2007-05-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 이음을 방지하는 실린더 보호 장치
DE102004030289A1 (de) * 2004-06-23 2006-01-12 Ina-Schaeffler Kg Schutzelement für eine vormontierte Einheit, insbesondere für eine Spannvorrichtung eines Umschlingungsmitteltriebes
JP4038197B2 (ja) * 2004-07-01 2008-01-23 ヤンマー株式会社 シリンダの保護装置
US7681657B2 (en) * 2004-12-09 2010-03-23 Deere & Company Debris guard
US7594466B2 (en) * 2007-01-12 2009-09-29 Rotobec Inc. Actuator with a protective sleeve for a piston
JP4759690B2 (ja) * 2008-01-29 2011-08-31 ヤンマー建機株式会社 旋回作業車
JP2009215698A (ja) * 2008-03-06 2009-09-24 Yanmar Co Ltd 作業車の排土装置
WO2010087792A1 (en) 2009-01-28 2010-08-05 Deere & Company Bucket cylinder debris guard
DE102011002158A1 (de) 2011-04-19 2012-10-25 Claas Selbstfahrende Erntemaschinen Gmbh Selbstfahrende Erntemaschine
EP2888487A4 (en) * 2012-08-27 2016-06-22 Komatsu Forest Ab METHOD AND PROTECTIVE ARRANGEMENT FOR LINEAR CONTROL AND ACTUATING MEANS CONSISTING OF FOREST MACHINE FELLER-BREAKER COMPONENTS
EP2933388B1 (en) * 2014-04-18 2020-11-11 Caterpillar Work Tools B. V. Hydraulic cylinder cover
CN104454776A (zh) * 2014-11-25 2015-03-25 无锡市晶瑜冶金机械有限公司 步进炉中平移油缸的安装结构
CN104696313B (zh) * 2015-03-13 2017-03-22 山东钢铁股份有限公司 一种防护液压缸的水膜装置及其防护方法
CN106560565B (zh) * 2016-01-08 2019-01-25 徐工集团工程机械股份有限公司 地下铲运机安全保护控制方法、装置和系统
CN108487364B (zh) * 2018-03-13 2020-07-21 柳州柳工挖掘机有限公司 挖掘机铲斗油缸防护机构

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189713587A (en) * 1897-06-02 1897-09-25 Adolph Proschinsky Improvements in Air Pumps for Bicycles.
US2730823A (en) * 1951-07-30 1956-01-17 John F Cassidy Bulldozer blade
GB770866A (en) * 1954-07-01 1957-03-27 John Raymond Austin Sr A guard for a piston rod of a piston and cylinder actuator
US2983059A (en) * 1957-04-29 1961-05-09 Deere & Co Hydraulic motor assembly
DE1601715A1 (de) * 1968-03-09 1970-08-13 Rolf Dohrendorf Hydraulische Einrichtung,insbesondere zum Antrieb von Baumaschinen
GB1415257A (en) * 1973-01-19 1975-11-26 Girling Ltd Gas springs
US3997986A (en) * 1975-10-09 1976-12-21 Caterpillar Tractor Co. Guard for hydraulic cylinder rods
US3982648A (en) * 1975-11-10 1976-09-28 International Harvester Company Lift arm safety bar
US4074769A (en) * 1976-04-28 1978-02-21 J. I. Case Company Bulldozer blade control
DE3036053A1 (de) * 1980-09-24 1982-04-08 Josef Martin Feuerungsbau GmbH, 8000 München Schutzvorrichtung fuer kolbenstangen von arbeitszylindern, insbesondere fuer feuerungsanlagen
DE8712732U1 (de) * 1987-09-21 1987-11-12 Hildebrandt, Fritz, 3257 Springe Arbeitsmaschine mit Hydraulikzylinder
DE3803964C2 (de) * 1988-02-10 2002-03-28 Festo Ag & Co Schutzvorrichtung

Also Published As

Publication number Publication date
DE4010225A1 (de) 1991-10-02
US5152351A (en) 1992-10-06
ATE136082T1 (de) 1996-04-15
DE4010225C2 (no) 1993-04-15
EP0450156A1 (de) 1991-10-09
DE59010249D1 (de) 1996-05-02
NO911267L (no) 1991-10-01
NO175649B (no) 1994-08-01
NO175649C (no) 1994-11-09
NO911267D0 (no) 1991-03-27
JPH04222725A (ja) 1992-08-12

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