GB629993A - Improvements in and relating to screw feeds - Google Patents

Improvements in and relating to screw feeds

Info

Publication number
GB629993A
GB629993A GB2619647A GB2619647A GB629993A GB 629993 A GB629993 A GB 629993A GB 2619647 A GB2619647 A GB 2619647A GB 2619647 A GB2619647 A GB 2619647A GB 629993 A GB629993 A GB 629993A
Authority
GB
United Kingdom
Prior art keywords
screw
nut
modification
feed
diameter
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
GB2619647A
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.)
WILLIAM ALFRED BRINKHURST
Original Assignee
WILLIAM ALFRED BRINKHURST
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 WILLIAM ALFRED BRINKHURST filed Critical WILLIAM ALFRED BRINKHURST
Priority to GB2619647A priority Critical patent/GB629993A/en
Publication of GB629993A publication Critical patent/GB629993A/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
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • F16H25/2266—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers arranged substantially in parallel to the screw shaft axis
    • 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
    • F16H25/229—Eccentric rings with their axis arranged substantially parallel to the screw shaft axis

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)

Abstract

629,993. Gearing ; screw and nut toothed and friction. BRINKHURST, W. A. Sept. 27, 1947, No. 26196. [Classes 80 (i) and 80 (iii)] A fine feed is obtained from a relatively coarse screw 3, Fig. 1, by means of a nut 4 which has a screw thread of the same pitch lead but has a larger diameter and is freely rotatable eccentrically of the screw 3 in a member 1 movable along the screw. The screw rotates the nut 4 by frictional engagement at one side thereof and the differing thread angles effect a linear movement of the nut along the screw. This movement is smaller than with a normal fixed nut and decreases with the diameter of the nut. Different rates of feed can be obtained in a modification by having several nuts of different diameters which can be selectively engaged with the screw by rotation of eccentric supporting rings. In another modification the threads are tapered and the depth of engagement between the screw and nut variable to vary the feed over a certain range. Alternatively one thread only is tapered in steps to give a step-by-step variation. In a further modification the nut is formed bellshaped with a varying diameter from one end to the other and is adjustably mounted in the movable member so that any selected diameter will engage the screw. Fig. 8 shows a modification of the simple arrangement of Fig. 1, in which in order to avoid any slip the nut 46 is positively driven from the screw 40 by a gear 45 slidable axially along the screw and meshing with an internal gear 47 on the nut 46. This arrangement is said to be particularly suitable for the feed mechanism of a screw-cutting lathe.
GB2619647A 1947-09-27 1947-09-27 Improvements in and relating to screw feeds Expired GB629993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2619647A GB629993A (en) 1947-09-27 1947-09-27 Improvements in and relating to screw feeds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2619647A GB629993A (en) 1947-09-27 1947-09-27 Improvements in and relating to screw feeds

Publications (1)

Publication Number Publication Date
GB629993A true GB629993A (en) 1949-10-03

Family

ID=10239854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2619647A Expired GB629993A (en) 1947-09-27 1947-09-27 Improvements in and relating to screw feeds

Country Status (1)

Country Link
GB (1) GB629993A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2026550A1 (en) * 1970-05-30 1971-12-16 Gaertner R Screw drive
DE2839920A1 (en) * 1978-09-14 1980-03-27 Gaertner Robert SCREW DRIVE
US4794810A (en) * 1986-04-12 1989-01-03 Jaguar Cars Limited Linear actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2026550A1 (en) * 1970-05-30 1971-12-16 Gaertner R Screw drive
DE2839920A1 (en) * 1978-09-14 1980-03-27 Gaertner Robert SCREW DRIVE
US4794810A (en) * 1986-04-12 1989-01-03 Jaguar Cars Limited Linear actuator

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