GB779420A - Improvements in or relating to screw and nut transmission devices - Google Patents

Improvements in or relating to screw and nut transmission devices

Info

Publication number
GB779420A
GB779420A GB17692/55A GB1769255A GB779420A GB 779420 A GB779420 A GB 779420A GB 17692/55 A GB17692/55 A GB 17692/55A GB 1769255 A GB1769255 A GB 1769255A GB 779420 A GB779420 A GB 779420A
Authority
GB
United Kingdom
Prior art keywords
screw
motor
torsion
dog
nut
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
GB17692/55A
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.)
Bronzavia SA
Original Assignee
Bronzavia SA
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 Bronzavia SA filed Critical Bronzavia SA
Publication of GB779420A publication Critical patent/GB779420A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16H25/2015—Means specially adapted for stopping actuators in the end position; Position sensing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/02—Undercarriages
    • B64C25/08—Undercarriages non-fixed, e.g. jettisonable
    • B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
    • B64C25/18—Operating mechanisms
    • B64C25/24—Operating mechanisms electric
    • 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
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2081—Parallel arrangement of drive motor to screw axis

Abstract

779,420. Screw-and-nut actuators. BRONZAVIA SOC. ANON. June 20, 1955 [March 9, 1955], No. 17692/55. Class 78 (3). [Also in Group XXIV] In a motor-driven screwjack having a torque limiter 16 inserted between the motor 8 and the screw 2, the screw 2 is hollow and the motor 8 is connected through reduction gearing 9 ... 14 to a torsion-rod 15 passing through the screw and splined thereto at its far end. The torque limiter is inserted between gears 10 and 11 and comprises spring-loaded friction discs. The nut head 4 is integral with the slidable and non- rotatable barrel 5 of the jack and limit switches 6, 7 are actuated by a boss 5a on the barrel. Co-operating dog-clutch teeth 17, 18 and 17a, 18a on each end of the screw and nut are provided. If for any reason (e.g. failure of a limit switch) the rotation of screw 2 is not stopped at the end of a stroke the dog-clutch teeth mesh so that torque is transmitted to the barrel 5 (thus avoiding excessive load on the screw flanks) and the torsion rod 15 is stressed until the friction discs 16 slip. If the motor is then reversed the potential energy in the torsion-rod augments the starting torque and the dog-clutch teeth are immediately separated.
GB17692/55A 1955-03-09 1955-06-20 Improvements in or relating to screw and nut transmission devices Expired GB779420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1123355T 1955-03-09

Publications (1)

Publication Number Publication Date
GB779420A true GB779420A (en) 1957-07-17

Family

ID=9633165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17692/55A Expired GB779420A (en) 1955-03-09 1955-06-20 Improvements in or relating to screw and nut transmission devices

Country Status (2)

Country Link
FR (1) FR1123355A (en)
GB (1) GB779420A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907223A (en) * 1957-04-22 1959-10-06 Sargent Engineering Corp Jack screw drive
US2981518A (en) * 1957-10-02 1961-04-25 Anderson Co Lifting mechanism
US3200664A (en) * 1963-10-16 1965-08-17 Electronic Specialty Co Stop for linear actuators
US3206994A (en) * 1963-11-19 1965-09-21 Robert J Angsten Screw jack brake device
DE1253427B (en) * 1964-12-12 1967-11-02 E A Storz O H G Jack
EP0046966A1 (en) * 1980-08-28 1982-03-10 Alpha-Vogt GmbH + Co. KG. Drive unit for a swimming-pool cover
EP0258522A1 (en) * 1986-08-28 1988-03-09 Josef Pradler Linear-transmission unit
US4790201A (en) * 1987-01-21 1988-12-13 Iveco Fiat S.P.A. Electromechanical linear actuator for tipping the driver's cab of a commercial vehicle
US5121019A (en) * 1986-08-26 1992-06-09 Josef Pradler Rotary to linear drive unit
GB2251233A (en) * 1990-11-30 1992-07-01 Stewart Oliver Smith Car jack
EP0647799A2 (en) * 1993-10-12 1995-04-12 Linak A/S Linear actuator
WO2006013172A1 (en) * 2004-08-04 2006-02-09 Nice Spa Device for interrupting selectively a rotary translational movement
WO2006089554A1 (en) * 2005-02-26 2006-08-31 Linak A/S A linear actuator
CN110715035A (en) * 2019-10-29 2020-01-21 北京特种机械研究所 Internal support multi-stage electric cylinder
FR3089950A1 (en) * 2018-12-18 2020-06-19 Safran Landing Systems Method of protection against impacts which may affect an aircraft undercarriage

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907223A (en) * 1957-04-22 1959-10-06 Sargent Engineering Corp Jack screw drive
US2981518A (en) * 1957-10-02 1961-04-25 Anderson Co Lifting mechanism
US3200664A (en) * 1963-10-16 1965-08-17 Electronic Specialty Co Stop for linear actuators
US3206994A (en) * 1963-11-19 1965-09-21 Robert J Angsten Screw jack brake device
DE1253427B (en) * 1964-12-12 1967-11-02 E A Storz O H G Jack
EP0046966A1 (en) * 1980-08-28 1982-03-10 Alpha-Vogt GmbH + Co. KG. Drive unit for a swimming-pool cover
US5121019A (en) * 1986-08-26 1992-06-09 Josef Pradler Rotary to linear drive unit
EP0258522A1 (en) * 1986-08-28 1988-03-09 Josef Pradler Linear-transmission unit
US4790201A (en) * 1987-01-21 1988-12-13 Iveco Fiat S.P.A. Electromechanical linear actuator for tipping the driver's cab of a commercial vehicle
GB2251233B (en) * 1990-11-30 1994-06-22 Stewart Oliver Smith Car jack
GB2251233A (en) * 1990-11-30 1992-07-01 Stewart Oliver Smith Car jack
EP0647799A2 (en) * 1993-10-12 1995-04-12 Linak A/S Linear actuator
EP0647799A3 (en) * 1993-10-12 1995-06-14 Linak As Linear actuator.
WO2006013172A1 (en) * 2004-08-04 2006-02-09 Nice Spa Device for interrupting selectively a rotary translational movement
CN100482972C (en) * 2004-08-04 2009-04-29 尼斯股份公司 Device for interrupting selectively a rotary translational movement
US8033193B2 (en) 2004-08-04 2011-10-11 Nice Spa Device for interrupting selectively a rotary translational movement
WO2006089554A1 (en) * 2005-02-26 2006-08-31 Linak A/S A linear actuator
FR3089950A1 (en) * 2018-12-18 2020-06-19 Safran Landing Systems Method of protection against impacts which may affect an aircraft undercarriage
EP3670964A1 (en) * 2018-12-18 2020-06-24 Safran Landing Systems Method for protecting against impacts that could affect an aircraft landing gear
CN110715035A (en) * 2019-10-29 2020-01-21 北京特种机械研究所 Internal support multi-stage electric cylinder

Also Published As

Publication number Publication date
FR1123355A (en) 1956-09-20

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