EP0671512B1 - Dispositif hydraulique de blocage pour dispositifs d'attelage rapide d'engins de chantier - Google Patents

Dispositif hydraulique de blocage pour dispositifs d'attelage rapide d'engins de chantier Download PDF

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Publication number
EP0671512B1
EP0671512B1 EP95100825A EP95100825A EP0671512B1 EP 0671512 B1 EP0671512 B1 EP 0671512B1 EP 95100825 A EP95100825 A EP 95100825A EP 95100825 A EP95100825 A EP 95100825A EP 0671512 B1 EP0671512 B1 EP 0671512B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
locking arrangement
arrangement according
locking
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
EP95100825A
Other languages
German (de)
English (en)
Other versions
EP0671512A2 (fr
EP0671512A3 (fr
Inventor
Ulrich Teutsch
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.)
CNH Industrial Baumaschinen GmbH
CNH Industrial Italia SpA
Original Assignee
O&K Orenstein and Koppel 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.)
Filing date
Publication date
Application filed by O&K Orenstein and Koppel GmbH filed Critical O&K Orenstein and Koppel GmbH
Publication of EP0671512A2 publication Critical patent/EP0671512A2/fr
Publication of EP0671512A3 publication Critical patent/EP0671512A3/fr
Application granted granted Critical
Publication of EP0671512B1 publication Critical patent/EP0671512B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated
    • 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
    • E02F9/2271—Actuators and supports therefor and protection therefor

Definitions

  • the invention relates to a hydraulically operated locking device for quick couplers on construction and work machines with the features of the preamble of Claim 1.
  • DE-C 42 10 790 describes a work machine, in particular Construction machine, known to have a recording equipment different tools is provided, and in which the change of work tools by means of a hydraulic actionable quick-change device can be brought about is, with several possibly in a control valve summarized spool are provided by means of which, if necessary, hydraulic cylinders in the area of the respective Tool and / or the quick-change device and / or the equipment receiving the work equipment can be actuated, in the hydraulic working group optionally at least one drain line leading to the tank and at least in the area of the working machine a line coupling station for optional recording not cables in use is provided.
  • the the Hydraulic cylinder actuating quick-change device is connected via a line connected to a connection of the line coupling station.
  • the Leakage oil line leads from the line coupling station or from the hydraulic cylinder to the line coupling station running pipe to the tank.
  • the aim of the subject of the invention is a technical to find an easier and effective solution in all cases, with what intended or unintentional unlocking the locking device can be safely avoided.
  • This goal is hydraulic with an inventive actuated locking device solved in that one on the piston surface side with the ring surface side Pressure chamber connecting device is provided, the is dimensioned so that with normal actuation the control valve still a problem-free locking and unlocking is possible.
  • a double-acting hydraulic cylinder can be used by means of two Hydraulic lines and with a control valve required for actuation connected is.
  • the hydraulic cylinder is on the cylinder and piston rod side each connected to a locking bolt, which in turn in Guides are stored.
  • Pressurized oil is applied to the cylinder through the supply line the surface of the piston has a force for locking via the locking bolt of equipment.
  • Unlocking the device is also done by operating the control valve, the Pressurization of the cylinder takes place via a further supply line.
  • the size of the hole is to choose so that the pressure drop is still with normal operation easy locking and unlocking of the quick-change device enables.
  • a double-acting hydraulic cylinder is used, which by means of two Hydraulic lines with a control valve required for actuation connected is.
  • the hydraulic cylinder is here with two pistons equipped, at the piston rod ends a locking bolt is attached.
  • the bolts are stored in the guides. Is a hydraulic line with the actuation of the control valve Pressurized and thus also the annular surfaces of the pistons is the Device unlocked.
  • the pistons are supported on a stop from, which is firmly connected to the interior of the cylinder.
  • FIG. 1 shows a schematic diagram of a quick coupler 1, by means of which for example a shovel 2 with the equipment 2 'only indicated a wheel loader, not shown, can be connected.
  • quick coupler 1 contains a double-acting one Hydraulic cylinder 3, which is connected to one by means of two hydraulic lines 4, 5 control valve 6 required for actuation is connected.
  • the control valve 6 When actuated of the control valve 6 such that there is a pressure in the hydraulic line 5 builds up, the piston 64 is pushed to the left in the direction of the arrow, wherein the locking bolt 8 attached to the piston rod 7 into the opening 9 of the left receiving element connected to the blade 2 10 is pushed.
  • FIG. 2 shows an alternative quick-change device 20, here two pistons 22, 23 are provided within a cylinder 21.
  • the ones from Control valve 24 outgoing hydraulic lines 25, 26 are connected to the hydraulic cylinder 21 connected, the hydraulic line 25 is a branch 27 includes, which serves to supply the piston 23.
  • Line 26 ends between the via an annular stop 28 within the Cylinder housing 21 'spaced pistons 22,23.
  • Each of the pistons 22, 23 is with a piston rod 29,30 and a locking bolt articulated thereon 31,32 connected in a corresponding opening 33,34 of with, for example, the bucket 35 of a hydraulic excavator, not shown connected receiving elements 36,37 is introduced.
  • the locked position is shown here in dash-dotted lines.
  • a connecting line 43 is provided, which with a Aperture 44 is equipped. Because of this connecting line 43 between the hydraulic lines 25 and 26 is seen on over time Build up the same pressure on both sides of the pistons 22, 23. Because the piston surfaces the piston 22,23 much larger than its opposite Ring surfaces are always the result of leakage from the control valve 24 a greater force in the locking direction than vice versa. So is a unwanted and uncontrolled opening of the lock of the quick-change device 20 excluded.
  • Figure 3 shows a partial view of a double-acting cylinder 45, i. H. only one of the pistons 46 together with the piston rod 47, which in its end region 48 connectable with a locking bolt, not shown here is.
  • the connection is in the area of the end face 49 of the cylinder 45 50 for the supply of the piston surface pressure chamber 52 and the Connection 51 is provided for the supply of the annular pressure chambers 53.
  • the hydraulic medium passes through the connection 50, the bore 54 and the line 55 to the piston surface pressure chamber 52, while the Pressure medium via the connection 51, the bore 56 and the bore 57 and the line 58 reaches the pressure chambers 53 on the ring side.
  • connection of the two pressure chambers 52 and 53 is now brought about in that a circumferential annular groove in the component 59 containing the connections 50, 51 60 is introduced and the connection 50 via a tap hole 61 with the Ring groove 60 and thus connected to the terminal 51.
  • the measure can be taken if the pressure builds up on one or both sides in the area of the connections 50.51 a corresponding pressure adjustment in the pressure rooms 52.53 can be brought about over time. It is analogous to FIG within the cylinder housing 62 of the cylinder 45 an annular circumferential Stop 63 provided for the piston 46.

Claims (8)

  1. Dispositif de blocage hydraulique destiné à des dispositifs d'attelage rapide sur des engins de chantier comprenant au moins un cylindre (3, 21, 45), qui contient au moins un piston (64, 22, 23, 46), des tiges de piston (7, 11, 29, 30, 47) qui sont associées aux cylindres (3, 21, 45) et/ou au ou aux pistons (64, 22, 23, 46), lesquelles tiges de piston sont munies d'axes de blocage (8, 12, 31, 32) fixés le cas échéant contre lesdites tiges, des conduites hydrauliques (4, 5, 25, 26, 27, 50, 51) étant raccordées au cylindre (3, 21, 45) et permettant d'exercer une pression sur le ou les pistons (64, 22, 23, 46) et/ou le cylindre (3, 21, 45) par l'intermédiaire d'au moins une vanne pilote (6, 24), chaque piston (64, 22, 23, 46) étant muni seulement sur une face d'une tige de piston (7, 11, 29, 30, 47), de telle sorte que chaque piston (64, 22, 23, 46) partage le cylindre (3, 21, 45) en un compartiment de pression du côté de la surface du piston (17, 38, 52) et en un compartiment de pression du côté de la surface circulaire du piston (18, 41, 42, 53), caractérisé en ce qu'il est prévu un système (19, 43) établissant la communication entre le compartiment de pression du côté de la surface du piston (17, 38, 52) et le compartiment de pression du côté de la surface circulaire du piston (18, 41, 42, 53), lequel système est réalisé dans des dimensions telles qu'une manoeuvre normale à l'aide de la vanne pilote (6, 24) permet encore d'effectuer sans problème un blocage ou un déblocage.
  2. Dispositif de blocage selon la revendication 1, caractérisé en ce que le système (19) est formé par au moins un trou réalisé dans le piston (64), qui fait communiquer les deux compartiments de pression (17, 18) l'un avec l'autre.
  3. Dispositif de blocage selon la revendication 1, caractérisé en ce que le système (43) est formé par une conduite de liaison qui relie les conduites hydrauliques (25, 26) l'une avec l'autre.
  4. Dispositif de blocage selon la revendication 3, caractérisé en ce qu'un obturateur (44) est monté dans la conduite de liaison (43).
  5. Dispositif de blocage selon la revendication 3, caractérisé en ce que la section de la conduite de liaison (43) est plus petite que la section des conduites hydrauliques (25, 26).
  6. Dispositif de blocage selon la revendication 1, caractérisé en ce que, dans le cas d'une disposition des tubes de raccordement (50, 51) pratiquement à même hauteur que le cylindre (45), une rainure annulaire (60) au moins partiellement périphérique est réalisée sur la pièce (59) qui entoure le cylindre (45), du côté du tube de raccordement, et en ce que les compartiments de pression (52, 53) peuvent communiquer l'un avec l'autre par un trou de coulée (61) qui s'étend à partir de l'un des tubes de raccordement (50) jusque dans la rainure annulaire (60).
  7. Dispositif de blocage selon l'une ou plusieurs des revendications 1 à 6, caractérisé en ce que, en cas d'utilisation de deux pistons (22, 23, 46) munis d'une seule tige de piston (29, 30, 47) à l'intérieur d'un cylindre (21, 45), il est prévu de réaliser dans la cage du cylindre (21', 62) une butée (28, 63) pour les pistons (22, 23, 46).
  8. Dispositif de blocage selon la revendication 7, caractérisé en ce que la butée (28, 63) est un anneau associé de manière fixe à la cage de cylindre (21', 62).
EP95100825A 1994-03-12 1995-01-23 Dispositif hydraulique de blocage pour dispositifs d'attelage rapide d'engins de chantier Expired - Lifetime EP0671512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4408386 1994-03-12
DE4408386A DE4408386C2 (de) 1994-03-12 1994-03-12 Hydraulisch betätigte Verriegelungsvorrichtung für Schnellwechsler an Bau- und Arbeitsmaschinen

Publications (3)

Publication Number Publication Date
EP0671512A2 EP0671512A2 (fr) 1995-09-13
EP0671512A3 EP0671512A3 (fr) 1996-04-24
EP0671512B1 true EP0671512B1 (fr) 1999-08-11

Family

ID=6512600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100825A Expired - Lifetime EP0671512B1 (fr) 1994-03-12 1995-01-23 Dispositif hydraulique de blocage pour dispositifs d'attelage rapide d'engins de chantier

Country Status (4)

Country Link
EP (1) EP0671512B1 (fr)
AT (1) ATE183270T1 (fr)
DE (2) DE4408386C2 (fr)
ES (1) ES2137382T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651507A1 (de) * 1995-12-30 1997-07-03 Samsung Heavy Ind Vorrichtung zum abnehmbaren Anbringen eines Zusatzgeräts an einem schweren Gerät
WO2002088476A1 (fr) * 2001-05-02 2002-11-07 Bruce Archibald Short Dispositif d'accouplement
PL2038485T3 (pl) 2006-06-27 2012-10-31 Oscar Meier Ag Urządzenie sprzęgające oraz maszyna do transportu ziemi z takim urządzeniem sprzęgającym
DE102009051669A1 (de) * 2009-10-07 2011-04-28 Wolfgang Triller Schwenkanbauvorrichtung
DE202012009838U1 (de) * 2012-07-24 2013-10-25 Kinshofer Gmbh Schnellkuppler
CN105927609B (zh) * 2016-06-08 2017-11-28 江苏永钢集团有限公司 一种轧机插销缸

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023740A (en) * 1960-05-25 1962-03-06 Fairchild Stratos Corp Delayed pneumatic actuator
DE2511819C3 (de) * 1975-03-18 1978-10-19 Liebherr-Hydraulikbagger Gmbh, 7951 Kirchdorf Hydraulikbagger
US4337687A (en) * 1980-05-23 1982-07-06 Prince Manufacturing Corporation Poppet trip device for hydraulic cylinders
DD241029A1 (de) * 1985-09-18 1986-11-26 Werkzeugmasch Forschzent Stuetzlager fuer eine beidseits zu fuehrende bohrstange
GB8629750D0 (en) * 1986-12-12 1987-01-21 British Aerospace Electro-hydraulic actuator assembly
US4767255A (en) * 1987-09-28 1988-08-30 J.I. Case Company Backhoe boom cylinder bleed circuit
DE4102370A1 (de) * 1990-02-12 1991-08-14 Walter Fritzel Loeffelbagger
DE4010224C2 (de) * 1990-03-30 1994-05-19 Porsche Ag Schnellwechselvorrichtung
DE4210790A1 (de) * 1991-04-04 1992-10-08 Orenstein & Koppel Ag Arbeitsmaschine, insbesondere baumaschine

Also Published As

Publication number Publication date
DE4408386A1 (de) 1995-09-21
DE4408386C2 (de) 1996-07-04
DE59506556D1 (de) 1999-09-16
EP0671512A2 (fr) 1995-09-13
ATE183270T1 (de) 1999-08-15
ES2137382T3 (es) 1999-12-16
EP0671512A3 (fr) 1996-04-24

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