EP0538208A1 - Elektrischer teleskopischer Hebebock - Google Patents

Elektrischer teleskopischer Hebebock Download PDF

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Publication number
EP0538208A1
EP0538208A1 EP92830569A EP92830569A EP0538208A1 EP 0538208 A1 EP0538208 A1 EP 0538208A1 EP 92830569 A EP92830569 A EP 92830569A EP 92830569 A EP92830569 A EP 92830569A EP 0538208 A1 EP0538208 A1 EP 0538208A1
Authority
EP
European Patent Office
Prior art keywords
jack
sleeve
telescopic
sleeves
base
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.)
Withdrawn
Application number
EP92830569A
Other languages
English (en)
French (fr)
Inventor
Enzo Maggiori
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 EP0538208A1 publication Critical patent/EP0538208A1/de
Withdrawn legal-status Critical Current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
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/18—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through worm gearings
    • 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
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
    • 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
    • B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors

Definitions

  • the present invention relates to a hoisting device, in particular for large vehicles, vessels, aircrafts, helicopters, a.s.o., which is extremely precise and safe.
  • a number of commercial, manually operated jacks have always been used. They have involved a number of problems bound to the short safety for the workers, the lack of precision in reaching and keeping the predetermined height, the wearisomeness of the preparation steps.
  • the hydraulic jacks of the prior art need the aircraft be secured by steel supports formed of sectional modules which are manually arranged. This allows the aircraft to be hoisted only at prefixed heights corresponding to multiples of the heights of the available modules, besides involving a lot of work.
  • the present invention seeks to overcome the problems mentioned above by providing electrically operated telescopic jacks which are particularly suitable for the test fields of helicopters and small airplanes and able to assure the maximum precision of the hoisting displacement, thus allowing a full-safe work without the use of any support scaffolding or external fastening bond of any type, thereby facilitating the weighing and levelling steps.
  • each jack is formed by an extensible, adjustable assembly comprising a number of coaxial sleeves slidable by being screwed to one another, and an axial member which is resistant to torsion, integral with the base of the jack, and formed of a telescopic rod placed at the centre of the sleeve assembly, the last extensible arm of which is connected to the base of the innermost jack in a groove where it can only axially slide but not rotate, thus making the sleeve rotatably integral with the base of the jack.
  • Each sleeve is externally threaded along its length and is provided at the upper side with an inner threading to which the next coaxial sleeve of right lesser diameter is screwed.
  • This inner threading is formed in a section having lower diameter and forming a shoulder serving as abuting stop for an annular edge projecting from the base of each sleeve, thus avoiding the latter to be completely drawn.
  • the outermost sleeve at the base of the jack is driven by a threaded bush which is rotated by an worm screw/crown gear mechanism. With this arrangement, as the bush is rotated, the outer sleeve will begin to rotate in the reverse direction, thus being unscrewed by reaction from the same bush as all of the remaining sleeves engaged with one another are prevented from rotating by the telescopic rod engaged with the latter sleeve.
  • the outer sleeve becomes integral with the adjoining sleeve and imparts to the same its movement, thus causing it to unscrew and the jack to extend. This is also the case in the following steps for the other sleeves until the maximum (or the desired) extension of the jack is reached without the need for outer constraints which would be necessary for the operation if the above-described devices were not provided.
  • the described jack includes an annular base 1 preferably of cast iron supporting a base plate 2 by which a threaded bush 7 preferably of bronze is rotatably carried with the interposition of thrust bearings 3, said bush being connected through a key 6 to a crown gear 4.
  • Crown gear 4 is driven by a worm screw 5 operated through an intermediate reduction gear (not shown) by an electric motor 20.
  • Threaded bush 7 engages with the threading of sleeve 8 which is the outermost sleeve of a set of three coaxial sleeves 8, 9 and 10 forming telescopically extensible assembly.
  • a suitable selection of materials, for example steel for sleeve 8 and bronze for sleeve 9, allows a self-lubrication.
  • Sleeves 8, 9 and 10 are screwed to one another through thread 22 formed at their upper side in an inner shoulder 24 acting as abuting stop for the annular edge 26 projecting from the lower base of the same sleeves.
  • Rigidly connected to the plate 2 is the lower end of a telescopic rod 11 formed by a plurality of extensible sections which are axially guided by means of appropriate grooves and sliding seats 13 and 15, the former being carried by the first section, the latter being connected to base 28 of sleeve 10.
  • Such rod 11 is an ideal axial fulcrum for the rotating sleeve assembly as its upper end can only slide in seat 15 but non rotate relative to sleeve 10, thus avoiding any further rotation thereof.
  • crown gear 4 rotates threaded bush 7
  • the latter causes by reaction sleeve 8 to unscrew in the reverse direction as all of the remaining sleeves 9 and 10 screwed to each other are prevented from rotating by telescopic rod 11.
  • the unscrewing of sleeve 8 is stopped as its annular edge 26 abuts against shoulder 27 of threaded bush 7;
  • sleeve 8 causes sleeve 9 to rotate and then to unscrew until its annular edge 26 abuts against shoulder 24 of sleeve 8. This is also the case in the following steps until the desired length is reached.
  • the jacks are strong and quite safe as they self-lock in the reached position and cannot be moved by chance even in the presence of mechanical troubles or power failure.
  • the screwing extension system allows even millimetric movement to be controlled with very high precision.
  • the jack of the present invention is capable to operate as a common hydraulic jack but makes the supporting of the aircraft useless and does not involve the use of further outer constraints.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
EP92830569A 1991-10-18 1992-10-15 Elektrischer teleskopischer Hebebock Withdrawn EP0538208A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM910793 1991-10-18
ITRM910793A IT1250121B (it) 1991-10-18 1991-10-18 Martinetto telescopico elettrico.

Publications (1)

Publication Number Publication Date
EP0538208A1 true EP0538208A1 (de) 1993-04-21

Family

ID=11400419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92830569A Withdrawn EP0538208A1 (de) 1991-10-18 1992-10-15 Elektrischer teleskopischer Hebebock

Country Status (3)

Country Link
EP (1) EP0538208A1 (de)
CA (1) CA2080761A1 (de)
IT (1) IT1250121B (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1097657A1 (de) * 1999-11-03 2001-05-09 Dewert Antriebs- und Systemtechnik GmbH & Co. KG Teleskopantriebseinheit
EP1334947A2 (de) * 2001-11-02 2003-08-13 Roberto Maggiori Selbstnivellierende Hubvorrichtung
US20100140573A1 (en) * 2008-12-08 2010-06-10 Gkss-Forschungszentrum Geesthacht Gmbh Lifting device
WO2014012148A1 (en) * 2012-07-20 2014-01-23 Pakka Jacks Pty Limited Jacking device
CN104671142A (zh) * 2015-03-11 2015-06-03 宁波捷美进出口有限公司 千斤顶
US9574613B1 (en) * 2014-06-23 2017-02-21 Stephen A. Youngers Machine leveling pedestal
JP6421281B1 (ja) * 2017-05-26 2018-11-07 カネテック株式会社 ジャッキ
WO2018216354A1 (ja) * 2017-05-26 2018-11-29 カネテック株式会社 ジャッキ
CN110130219A (zh) * 2019-06-21 2019-08-16 招商局重庆交通科研设计院有限公司 一种解决桥头跳车的自适应过渡段装置
CN111457795A (zh) * 2020-04-08 2020-07-28 陕西普达盈信自动化系统工程有限公司 火箭炮用减速升降机构
CN111675129A (zh) * 2020-05-29 2020-09-18 山东建筑大学 电动螺旋跟随千斤顶及其控制方法
US11279602B2 (en) 2019-12-12 2022-03-22 Gilbert Engineering, LLC Smart jack array
JP2023092642A (ja) * 2021-12-22 2023-07-04 愛知機械テクノシステム株式会社 リフター装置およびこれを備える無人搬送車

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457825A (en) * 1921-05-16 1923-06-05 Paul J Devan Screw jack
GB235497A (en) * 1925-02-09 1925-06-18 Herbert Raymond Barrett Improvements in or relating to lifting jacks
GB324605A (en) * 1929-05-28 1930-01-30 R T Shelley Ltd A new or improved lifting jack
DE521659C (de) * 1928-11-07 1931-03-26 F & M Lautenschlaeger G M B H Hebevorrichtung
GB368750A (en) * 1930-12-02 1932-03-02 Trewhella Bros Proprietary Ltd Improvements in screw jacks
US1868478A (en) * 1928-04-25 1932-07-19 Walker Mfg Co Lifting jack
US1933777A (en) * 1930-09-19 1933-11-07 Walker Mfg Co Lifting jack
DE639768C (de) * 1934-04-14 1936-12-12 Max Motzigkeit Vom Wagenmotor aus angetriebener Teleskopspindelheber
US2183367A (en) * 1938-08-23 1939-12-12 Alfred De Cozen Vehicle lifting jack
DE737389C (de) * 1941-02-01 1943-07-12 Bamag Meguin Ag Spindelschuvorrichtung fuer Teleskopspindelheber
WO1984004371A1 (en) * 1983-04-25 1984-11-08 Ingemar Svensson An influencing arrangement with telescopically variable length

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457825A (en) * 1921-05-16 1923-06-05 Paul J Devan Screw jack
GB235497A (en) * 1925-02-09 1925-06-18 Herbert Raymond Barrett Improvements in or relating to lifting jacks
US1868478A (en) * 1928-04-25 1932-07-19 Walker Mfg Co Lifting jack
DE521659C (de) * 1928-11-07 1931-03-26 F & M Lautenschlaeger G M B H Hebevorrichtung
GB324605A (en) * 1929-05-28 1930-01-30 R T Shelley Ltd A new or improved lifting jack
US1933777A (en) * 1930-09-19 1933-11-07 Walker Mfg Co Lifting jack
GB368750A (en) * 1930-12-02 1932-03-02 Trewhella Bros Proprietary Ltd Improvements in screw jacks
DE639768C (de) * 1934-04-14 1936-12-12 Max Motzigkeit Vom Wagenmotor aus angetriebener Teleskopspindelheber
US2183367A (en) * 1938-08-23 1939-12-12 Alfred De Cozen Vehicle lifting jack
DE737389C (de) * 1941-02-01 1943-07-12 Bamag Meguin Ag Spindelschuvorrichtung fuer Teleskopspindelheber
WO1984004371A1 (en) * 1983-04-25 1984-11-08 Ingemar Svensson An influencing arrangement with telescopically variable length

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1097657A1 (de) * 1999-11-03 2001-05-09 Dewert Antriebs- und Systemtechnik GmbH & Co. KG Teleskopantriebseinheit
EP1334947A2 (de) * 2001-11-02 2003-08-13 Roberto Maggiori Selbstnivellierende Hubvorrichtung
EP1334947B1 (de) * 2001-11-02 2006-09-27 Roberto Maggiori Selbstnivellierende Hubvorrichtung
US20100140573A1 (en) * 2008-12-08 2010-06-10 Gkss-Forschungszentrum Geesthacht Gmbh Lifting device
EP2194018A3 (de) * 2008-12-08 2011-08-24 Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Hebevorrichtung
EP2874935A4 (de) * 2012-07-20 2016-03-16 Mslv Pty Ltd Einpressvorrichtung
RU2638407C2 (ru) * 2012-07-20 2017-12-13 ТиЭфПи Энджиниэринг Пти Лимитед Подъемное устройство
CN104603042A (zh) * 2012-07-20 2015-05-06 Mslv私人有限公司 顶起设备
KR20150032909A (ko) * 2012-07-20 2015-03-30 엠에스엘브이 피티와이 엘티디 재킹 디바이스
JP2015525725A (ja) * 2012-07-20 2015-09-07 エムエスエルブイ プロプライエタリー リミテッドＭｓｌｖ Ｐｔｙ Ｌｔｄ ジャッキ装置
WO2014012148A1 (en) * 2012-07-20 2014-01-23 Pakka Jacks Pty Limited Jacking device
US9505593B2 (en) 2012-07-20 2016-11-29 Mslv Pty Ltd. Jacking device
AU2013293050B2 (en) * 2012-07-20 2017-08-03 Tfp Engineering Pty Limited Jacking device
US9574613B1 (en) * 2014-06-23 2017-02-21 Stephen A. Youngers Machine leveling pedestal
CN104671142A (zh) * 2015-03-11 2015-06-03 宁波捷美进出口有限公司 千斤顶
JP6421281B1 (ja) * 2017-05-26 2018-11-07 カネテック株式会社 ジャッキ
WO2018216354A1 (ja) * 2017-05-26 2018-11-29 カネテック株式会社 ジャッキ
CN110130219A (zh) * 2019-06-21 2019-08-16 招商局重庆交通科研设计院有限公司 一种解决桥头跳车的自适应过渡段装置
US11279602B2 (en) 2019-12-12 2022-03-22 Gilbert Engineering, LLC Smart jack array
CN111457795A (zh) * 2020-04-08 2020-07-28 陕西普达盈信自动化系统工程有限公司 火箭炮用减速升降机构
CN111675129A (zh) * 2020-05-29 2020-09-18 山东建筑大学 电动螺旋跟随千斤顶及其控制方法
CN111675129B (zh) * 2020-05-29 2021-08-10 山东建筑大学 电动螺旋跟随千斤顶及其控制方法
JP2023092642A (ja) * 2021-12-22 2023-07-04 愛知機械テクノシステム株式会社 リフター装置およびこれを備える無人搬送車

Also Published As

Publication number Publication date
ITRM910793A1 (it) 1993-04-18
ITRM910793A0 (it) 1991-10-18
CA2080761A1 (en) 1993-04-19
IT1250121B (it) 1995-03-30

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