GB956958A - Screw jack - Google Patents
Screw jackInfo
- 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
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.
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)
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)
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)
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 |
-
1963
- 1963-02-20 GB GB676063A patent/GB956958A/en not_active Expired
- 1963-02-25 DE DEJ23243A patent/DE1202456B/en active Pending
- 1963-02-25 CH CH235063A patent/CH399695A/en unknown
Cited By (5)
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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