GB790487A - Improvements in or relating to screw-thread-engaging devices - Google Patents

Improvements in or relating to screw-thread-engaging devices

Info

Publication number
GB790487A
GB790487A GB240555A GB240555A GB790487A GB 790487 A GB790487 A GB 790487A GB 240555 A GB240555 A GB 240555A GB 240555 A GB240555 A GB 240555A GB 790487 A GB790487 A GB 790487A
Authority
GB
United Kingdom
Prior art keywords
screw
thread
housing
race
revolution
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
GB240555A
Inventor
Jack Britt
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB240555A priority Critical patent/GB790487A/en
Publication of GB790487A publication Critical patent/GB790487A/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
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2285—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rings engaging the screw shaft with the inner perimeter, e.g. using inner rings of a ball bearing
    • F16H25/2295—Rings which are inclined or can pivot around an axis perpendicular to the screw shaft axis

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

790,487. Screw-and-nut gearing. ROLLSROYCE, Ltd. Jan. 18, 1956 [Jan. 26, 1955], No. 2405/55. Class 80 (3). The thread of a screw 17 is engaged over only part of its circumference by an annular channel, of larger diameter than the thread, in the inner race 21 of a ball-bearing 18 eccentrically supported in a cylindrical housing 10 at an inclination equal to the thread helix angle. As shown, the screw is engaged by channels in three races 21 having their centres symmetrically arranged around the common axis of the screw 17 and housing 10. The eccentricity of each race 21 is substantially half the difference between the pitch circle diameters of the channel and the thread.. Each set of balls 18 runs in a two-piece outer race 14, 15 connected by splines to the housing 10, and the three outer races, with interposed abutment rings, are clamped in the housing by a threaded ring 20. For each revolution of the screw the housing 10 undergoes a relative axial displacement equal to the thread pitch while each ring 21 rotates for somewhat less than one revolution. In a modification the annular channel in an inner race 21 is replaced by an annular projection or land.
GB240555A 1955-01-26 1955-01-26 Improvements in or relating to screw-thread-engaging devices Expired GB790487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB240555A GB790487A (en) 1955-01-26 1955-01-26 Improvements in or relating to screw-thread-engaging devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB240555A GB790487A (en) 1955-01-26 1955-01-26 Improvements in or relating to screw-thread-engaging devices

Publications (1)

Publication Number Publication Date
GB790487A true GB790487A (en) 1958-02-12

Family

ID=9738969

Family Applications (1)

Application Number Title Priority Date Filing Date
GB240555A Expired GB790487A (en) 1955-01-26 1955-01-26 Improvements in or relating to screw-thread-engaging devices

Country Status (1)

Country Link
GB (1) GB790487A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135016A (en) * 1983-01-27 1984-08-22 Uhing Joachim Ing Mechanism for transferring rotary motion into linear motion
US4794810A (en) * 1986-04-12 1989-01-03 Jaguar Cars Limited Linear actuator
GB2277788A (en) * 1993-05-06 1994-11-09 Chen Hsi Kuan Bearing screw and nut assembly
WO2016181341A1 (en) * 2015-05-14 2016-11-17 Fondazione Istituto Italiano Di Tecnologia Linear drive mechanism of the screw and nut type with perfect rolling contact

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135016A (en) * 1983-01-27 1984-08-22 Uhing Joachim Ing Mechanism for transferring rotary motion into linear motion
AT396515B (en) * 1983-01-27 1993-10-25 Uhing Hans Peter CLOSED DRIVE NUT
US4794810A (en) * 1986-04-12 1989-01-03 Jaguar Cars Limited Linear actuator
GB2277788A (en) * 1993-05-06 1994-11-09 Chen Hsi Kuan Bearing screw and nut assembly
WO2016181341A1 (en) * 2015-05-14 2016-11-17 Fondazione Istituto Italiano Di Tecnologia Linear drive mechanism of the screw and nut type with perfect rolling contact
US10364871B2 (en) 2015-05-14 2019-07-30 Fondazione Istituto Italiano Di Technologia Linear drive mechanism of the screw and nut type with perfect rolling contact

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