EP0017765B1 - Hydraulische Hebevorrichtung - Google Patents

Hydraulische Hebevorrichtung Download PDF

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Publication number
EP0017765B1
EP0017765B1 EP80101334A EP80101334A EP0017765B1 EP 0017765 B1 EP0017765 B1 EP 0017765B1 EP 80101334 A EP80101334 A EP 80101334A EP 80101334 A EP80101334 A EP 80101334A EP 0017765 B1 EP0017765 B1 EP 0017765B1
Authority
EP
European Patent Office
Prior art keywords
rail
lifting device
operating lever
pawl
free end
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
Application number
EP80101334A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0017765A1 (de
Inventor
Anton Laupper
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0017765A1 publication Critical patent/EP0017765A1/de
Application granted granted Critical
Publication of EP0017765B1 publication Critical patent/EP0017765B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/30—Constructional features with positive brakes or locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
    • B66F7/04—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars hydraulically or pneumatically operated

Definitions

  • the invention relates to a hydraulic lifting device, in particular a jack, with a safety locking device consisting of a toothed rack and a pawl, an actuating lever acting on the pawl, the free end of which is slidably guided on a rail running parallel to the toothed rack and the rail is preferably hydraulically adjustable at least transversely to its longitudinal extent.
  • a lifting platform with a securing device is also known (DE-U-6 905 457), which is designed in the form of a toothed rack and a pawl.
  • An actuating lever is attached to the pawl, the free end of which rests on a control rod running parallel to the rack and can thus be pivoted along this control rod when the lift is adjusted in height.
  • the control rod In order to bring the pawl into a disengaged position with respect to the rack, the control rod is rotated about its longitudinal axis, a top bar arranged on the control rod lifting the actuating lever so that the pawl is pivoted out.
  • the latching of the pawl is, however, only based on the dead weight of the pawl, so that if the pawl is slightly dirty or stiff, proper securing is no longer possible.
  • the object of the invention is therefore to create a safety locking device for hydraulic lifting devices which enables the pawl to be latched in and out and still be operated very easily.
  • a roller and an angular slider be held rotatably about a horizontal axis at the free end of the actuating lever, a slot remaining free between the leg of the slider running parallel to the axis of rotation and the surface of the roller, in which the approximately vertical rail engages.
  • the 1 and 2 consists of a vertical, box-shaped column 1, in which a carriage 2 is mounted. This carriage 2 is moved up and down inside the column 1 by means of a hydraulic telescopic cylinder 3. Guideways 4 and 5, for example made of plastic, are provided both on the column 1 and on the carriage 2. A fork 6 is articulated or suspended on the carriage 2, which fork can thus be raised or lowered together with the carriage 2.
  • the column 1 is connected to a sack-cart-like frame 7. There is also the possibility of providing 7 wheels on the frame so that the entire column can be moved back and forth as desired.
  • the present invention is essentially a safety locking device with which the height-adjustable slide 2 can be mechanically secured in the desired setting.
  • a rack 8 is provided on the fixed part, that is, on the inside of the column 1, in which a pawl 9 engages in the locked position.
  • the pawl 9 is held by means of axis boating 10 in a bearing 11 which is firmly connected to the carriage 2.
  • the rack 8 extends over its entire displacement range of the carriage 2. So that a blocking can be carried out in the respective position.
  • This rail 17 is preferably hydraulically adjustable, at least transversely to its longitudinal extent.
  • a roller 13 and an angular identical piece 14 are held rotatably about a horizontal axis 15 at the free end of the actuating lever 12.
  • a slot is formed between the leg 16 of the slider 14 running parallel to the axis of rotation and the surface of the roller 13, in which the rail 17 engages.
  • the rail 17 is rotatably attached to at least one bracket 19 pivotable about a horizontal axis 18. With a height adjustment of the rail 17, this also results in a lateral adjustment in the horizontal direction, since the bracket 19 pivots about the axis of rotation 18.
  • the guide parts formed from the slider 14 and the roller 13 are also pivoted in this direction, so that the pawl 9 comes out of its engaged position.
  • the pawl 9 is inevitably guided into the locked position.
  • a pin 20 which protrudes approximately in the horizontal direction and which engages in a slot 21 which runs obliquely to the vertical or curved shape on the fixed part of the lifting device, that is to say on the column 1. Furthermore, a fixed pin 22 is fastened to the column 1, a hydraulic cylinder 23 being inserted between these two pins 20 and 22. As a result of the arcuate slot 21 and the rotatably mounted bracket 19, the rail 17 is displaced in the horizontal direction. Of course, this movement also moves the rail 17 in the vertical direction, although the actuation lever 12 is only triggered by the horizontal movement of the rail 17.
  • the rail is expediently L-shaped in cross section, so that the parts engaging on it can be designed in a structurally simple manner.
  • One leg 24 engages between the guide parts on the actuating lever / 12.
  • the tab 19 engages on the other leg 25.
  • the pin 20 is attached to this leg 25.
  • the actuating lever 12 is formed from two arms 27 and 28, which adjoin one another at approximately a right angle, the free arm 28 carrying the guide parts being directed upward.
  • Fig. 3 the two end positions of the pawl 9 are shown, the locking position is shown fully extended and the unlocked position can be seen in dashed lines in this drawing. It can be seen from this that when the tab 19 is pivoted, the rail 17 comes into the dashed position shown on the left in the drawing.
  • the actuating lever 12 is pivoted upward about the axis 26 of the pawl 9, since the slider 14 and the roller 13 must follow the rail 17.
  • each pawl 9 is particularly advantageous for large loads.
  • several pawls arranged one above the other could be provided, which engage in the same rack.
  • the actuation of this pawl can either take place in that each pawl is assigned a corresponding actuating lever 12 with guide parts or a single guide part could be provided, in which case the actuating levers one above the other could be coupled to one another by intermediate linkages.
  • an embodiment would be possible in which two toothed racks are provided next to one another or opposite boundary walls of the column 1.
  • the design of the pawl itself can also be varied. It could have these two or more projections for engaging two or more recesses in the rack.
  • the pawl can also be designed in the form of a short rack counterpart, which, for example, is held on an actuating lever so as to be pivotable about a horizontal axis, so that all teeth always come into mutual engagement with the rack. If the pawl is designed as a toothed rack piece, actuating levers could also be assigned to both ends of this pawl so that this pawl would then be moved approximately horizontally.
  • the present invention was explained using an exemplary embodiment on a hydraulic jack.
  • a safety locking device can of course be used on any other hydraulic lifting device.
  • the partial actuator cylinder 3 provided for the actual stroke and the hydraulic cylinder 23 can be matched to one another. So it will be useful that when the telescopic cylinder 3 is acted upon, the hydraulic cylinder 23 is also acted on, so that at the same time the pawl is disengaged from the rack with a lifting movement. Immediately after the lifting action has ceased by the telescopic cylinder 3, the hydraulic cylinder 23 can then be actuated again, so that the pawl immediately returns to the blocking position.
  • the embodiment of the rack and pawl is of no particular importance.
  • any embodiment of a rack or pawl can be used here.
  • a rack in the form of successively spaced pins could also be provided, so that practically a ladder-shaped rod is created, the pawl, which is then constructed accordingly, engaging with these pins or between these pins.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP80101334A 1979-04-13 1980-03-14 Hydraulische Hebevorrichtung Expired EP0017765B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT281779A AT359694B (de) 1979-04-13 1979-04-13 Hydraulische hebevorrichtung
AT2817/79 1979-04-13

Publications (2)

Publication Number Publication Date
EP0017765A1 EP0017765A1 (de) 1980-10-29
EP0017765B1 true EP0017765B1 (de) 1982-12-15

Family

ID=3540754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101334A Expired EP0017765B1 (de) 1979-04-13 1980-03-14 Hydraulische Hebevorrichtung

Country Status (7)

Country Link
US (1) US4328951A (es)
EP (1) EP0017765B1 (es)
JP (1) JPS55140489A (es)
AT (1) AT359694B (es)
DE (1) DE3061303D1 (es)
DK (1) DK157180A (es)
ES (1) ES8101511A1 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041052A1 (de) * 2007-08-29 2009-03-05 Dürr Assembly Products GmbH Hubvorrichtung
CN104340920A (zh) * 2014-10-11 2015-02-11 国家电网公司 变距式液压升降操作手车

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505455A (en) * 1982-06-21 1985-03-19 Vbm Corporation Synchronized double post fluid operated lift assembly
US4531614A (en) * 1983-07-25 1985-07-30 Autoquip Corporation Fork truck service lift
DE3333292A1 (de) * 1983-09-15 1985-04-18 Walter 7290 Freudenstadt Finkbeiner Gleichlaufvorrichtung fuer hebeboecke
US4599030A (en) * 1985-04-01 1986-07-08 The United States Of America As Represented By The Secretary Of The Navy Marginal terrain straddle-lift container handler
JPH0630792Y2 (ja) * 1987-07-23 1994-08-17 杉安工業株式会社 同調型昇降装置における片下降防止用安全装置
US5221075A (en) * 1990-11-06 1993-06-22 Helmut Habicht Safety device for a lifting apparatus
US5174414A (en) * 1991-07-26 1992-12-29 Burns Richard H Service lift stand apparatus for small implements
NL9200688A (nl) * 1992-04-14 1993-11-01 Stertil Bv Veiligheidspalinrichting.
US5284224A (en) * 1993-04-19 1994-02-08 Delaware Capital Formation, Inc. Low clearance vehicle lift
US5604974A (en) * 1994-05-11 1997-02-25 Gemcor Engineering Corporation Apparatus for positioning a wing panel for riveting
DE29611404U1 (de) * 1996-07-02 1996-08-14 Meyer Siegfried Hubplattform
US6286813B1 (en) 1997-12-05 2001-09-11 Albert V. Coccaro Automotive jack employing a pneumatic lifting system
US6279685B1 (en) * 1998-05-28 2001-08-28 Hydra-Lift Industries Ltd. Lifting apparatus
US6382358B1 (en) 2000-10-31 2002-05-07 Jeffrey Scott Kritzer Safety lock device for automobile lifts
US6662388B2 (en) 2001-12-18 2003-12-16 Evelyn M. Friel Patient adjustment device
US7055801B2 (en) * 2003-10-31 2006-06-06 Norco Industries, Inc. Quick rise hydraulic lifting jack
DE102006049741B4 (de) * 2005-10-27 2009-07-09 Iht-Innovative Hebe Technik Gmbh Sicherheitseinrichtung für eine Hebevorrichtung in Form eines Scheren-Hubtisches
CN102153029B (zh) * 2011-04-07 2013-05-01 宁波大学 一种可自动复位的多级延伸式顶升装置
US9022356B2 (en) 2012-08-30 2015-05-05 Norco Industries, Inc. Removable saddle and extension for floor jack
CN102974704A (zh) * 2012-10-25 2013-03-20 应志恩 一种模具定位成型装置
CN106536400B (zh) 2014-05-30 2019-06-25 帕特里西奥·弗朗西斯科·吉梅内斯维加拉 具有液压水平运动且布置在用于更换卡车的料斗和箱的组件中的中心旋转柱
US10486950B2 (en) * 2014-07-16 2019-11-26 Gray Manufacturing Company, Inc. Down stop indicator for vehicle lift

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE243043C (es) *
DE207220C (es) *
US1512837A (en) * 1922-08-09 1924-10-21 Evenden James Charles Pneumatic jack
DE1731975U (de) * 1956-05-16 1956-10-11 Ruhr Intrans Hubstapler G M B Hubmast, insbesondere fuer flurfoerdergeraete.
DE6905457U (de) * 1969-02-11 1969-12-11 Zipperer B Fa Hebebuehne mit sicherungsvorrichtung
US3647183A (en) * 1970-09-02 1972-03-07 Royal Industries Vehicle jack
FR2274543A1 (fr) * 1974-06-13 1976-01-09 Petit Georges Perfectionnements aux ponts elevateurs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041052A1 (de) * 2007-08-29 2009-03-05 Dürr Assembly Products GmbH Hubvorrichtung
CN104340920A (zh) * 2014-10-11 2015-02-11 国家电网公司 变距式液压升降操作手车

Also Published As

Publication number Publication date
JPS55140489A (en) 1980-11-01
EP0017765A1 (de) 1980-10-29
AT359694B (de) 1980-11-25
ES490513A0 (es) 1980-12-16
ES8101511A1 (es) 1980-12-16
ATA281779A (de) 1980-04-15
US4328951A (en) 1982-05-11
DE3061303D1 (en) 1983-01-20
DK157180A (da) 1980-10-14

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