GB956958A - Screw jack - Google Patents

Screw jack

Info

Publication number
GB956958A
GB956958A GB676063A GB676063A GB956958A GB 956958 A GB956958 A GB 956958A GB 676063 A GB676063 A GB 676063A GB 676063 A GB676063 A GB 676063A GB 956958 A GB956958 A GB 956958A
Authority
GB
United Kingdom
Prior art keywords
screw
sections
jack
lock screws
backlash
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
GB676063A
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.)
Joyce Cridland Co
Original Assignee
Joyce Cridland Co
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 Joyce Cridland Co filed Critical Joyce Cridland Co
Publication of GB956958A publication Critical patent/GB956958A/en
Expired legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2003—Screw mechanisms with arrangements for taking up backlash
    • F16H25/2006—Screw mechanisms with arrangements for taking up backlash with more than one nut or with nuts consisting of more than one bearing part

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

956,958. Screw jacks. JOYCE-GRIDLAND CO. Feb. 20, 1963 [Feb. 26, 1962], No. 6760/63. Heading B8J. A nut assembly 12 of a worm gear screw jack supports a jack screw 14 and comprises two sections 30, 32, which, when their threads wear, may be moved closer to each other to clamp the sections into firm engagement with the thread of the screw 14 to reduce backlash therebetween. The nut sections are connected by pins 33 located within aligned apertures. A tube 20 and cap 24 protect the lower portion of the screw 14 which is prevented from rotation, e.g. by attachment of a pad 18 with a load. When the jack is initially assembled, there is a gap between the bottom surface of a bearing cap flange 50 and the top surface of a main housing 10, and lock screws 52 are tightened on the housing. When backlash becomes apparent, the lock screws are loosened and the cap 16 is screwed down, thus causing a thrust bearing 34 and the nut section 30 to move downwardly. With the backlash taken up the lock screws 52 are retightened.
GB676063A 1962-02-26 1963-02-20 Screw jack Expired GB956958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17560462A 1962-02-26 1962-02-26

Publications (1)

Publication Number Publication Date
GB956958A true GB956958A (en) 1964-04-29

Family

ID=22640893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB676063A Expired GB956958A (en) 1962-02-26 1963-02-20 Screw jack

Country Status (3)

Country Link
CH (1) CH399695A (en)
DE (1) DE1202456B (en)
GB (1) GB956958A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323777A (en) * 1964-10-28 1967-06-06 Duff Norton Co Anti-backlash worm gear jack
EP0021623A1 (en) * 1979-05-31 1981-01-07 Fortune Engineering Limited Worm screw jack apparatus and method of making same
JPH06234498A (en) * 1993-02-08 1994-08-23 Mitsubishi Electric Corp Screw jack device with backlash removing function

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1550657B2 (en) * 1966-02-03 1971-06-09 Blohm, Robert, 2000 Hamburg Berge dorf GEAR WITH A VERTICALLY SCREW-MOVABLE THREADED SPINDLE
DE102009004438A1 (en) * 2009-01-13 2010-07-15 Volkswagen Ag Ball screw spindle for electromechanical steering mechanism, has bearing with threaded nut, where thread contour of threaded nut is formed as sliding contour of ball thread of ball screw spindle
DE102017102318B4 (en) 2017-02-07 2022-02-17 Neff-Gewindetriebe GmbH bevel gear
DE102017209681A1 (en) * 2017-06-08 2018-12-13 Zf Friedrichshafen Ag Actuator with a spindle drive and rear axle steering

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US751336A (en) * 1904-02-02 Lifting-jack
DE38503C (en) * A. BROSIG in Habelschwerdt, Schlesien Two-part screw nut with counteracting screws to avoid the dead walk
DE857304C (en) * 1951-04-08 1952-11-27 Fritz Werner Ag Device for eliminating the axial play in spindle drives
US2959976A (en) * 1958-05-19 1960-11-15 Kearney & Trecker Corp Backlash eliminator
FR1237955A (en) * 1958-08-12 1960-08-05 Nippon Light Metal Co Bolt-and-nut and tangential screw device for lifting, lowering or suspending loads
FR1268256A (en) * 1958-10-20 1961-07-28 Bristol Siddeley Engines Ltd Drive device by threaded shaft and ball nuts, especially for machine tools

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323777A (en) * 1964-10-28 1967-06-06 Duff Norton Co Anti-backlash worm gear jack
DE1258573B (en) * 1964-10-28 1968-01-11 Duff Norton Co Screw drive
EP0021623A1 (en) * 1979-05-31 1981-01-07 Fortune Engineering Limited Worm screw jack apparatus and method of making same
JPH06234498A (en) * 1993-02-08 1994-08-23 Mitsubishi Electric Corp Screw jack device with backlash removing function
JP2738631B2 (en) 1993-02-08 1998-04-08 三菱電機株式会社 Screw jack device with backlash removal function

Also Published As

Publication number Publication date
CH399695A (en) 1965-09-30
DE1202456B (en) 1965-10-07

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