GB664824A - Improvements in or relating to means for eliminating back lash in transmission mechanisms - Google Patents

Improvements in or relating to means for eliminating back lash in transmission mechanisms

Info

Publication number
GB664824A
GB664824A GB1089748A GB1089748A GB664824A GB 664824 A GB664824 A GB 664824A GB 1089748 A GB1089748 A GB 1089748A GB 1089748 A GB1089748 A GB 1089748A GB 664824 A GB664824 A GB 664824A
Authority
GB
United Kingdom
Prior art keywords
nut
screw
boss
sleeve
nuts
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
GB1089748A
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.)
VICTORIA MACHINE TOOL Co
Original Assignee
VICTORIA MACHINE TOOL 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 VICTORIA MACHINE TOOL Co filed Critical VICTORIA MACHINE TOOL Co
Priority to GB1089748A priority Critical patent/GB664824A/en
Publication of GB664824A publication Critical patent/GB664824A/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
    • F16H25/2003—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/56—Preventing backlash

Landscapes

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

Abstract

664,824. Machine tool details. VICTORIA MACHINE TOOL CO., Ltd., FRYE, J., and SELBY, J. May 17, 1949 [April 20, 1948], No. 10897/48. Class 83 (iii). [Also in Group XXIV] A screw-and-nut transmission mechanism has means for eliminating backlash. particularly for when the load is in the direction of movement. It is shown applied to a milling-machine in which the table is connected to a non- rotatable traverse screw 1 engaged by two nuts 2, 3, rotatably mounted in a fixed part 23. The nut 2 is rotated by gearing 26, 29 and has projecting tongues 5 engaging slots in the nut 3 so that the two nuts rotate together but may have relative axial movement. The outside of the nut 3 is formed with a coarse helical thread engaging a similar thread in a sleeve 4 in frictional engagement with a rotatably-mounted boss 7 which may be held stationary. The boss 7 has a conical bore and is axially urged into frictional engagement with the conical periphery of the sleeve 4 by springs 12 acting on pins 10 which are slidable in holes 11 in the boss, the pins being secured to a rotatable annulus 9 abutting the face of a collar 8 secured to the sleeve 4. The screw 1 may be moved at two speeds-for " quick traverse " or for " feed "-by separate motors, and as the backlash-eliminating means is required only when feeding, it is automatically effective only on energization of the feed motor. A solenoid 16 is connected, through a switch, across the feed motor terminals and actuates a rod 36 raising a plunger 14 to engage slots 13 in the boss 7 and hold it against rotation. The nut 3 is thus yieldingly urged forward by the coarse helical thread (in co-operation with the slipping connection 4, 7) so that the nut 3 acts as the driving means for the screw 1 and the nut 2 as restraining means. When the solenoid 16 is de-energized the screw 1 is driven by the nut 2. Conventional backlash-eliminating means, comprising a nut 17 rotatable with nut 2, the two nuts being adjustably pressed axially apart, is also provided. Specification 596,147, [Group XXIV], is referred to.
GB1089748A 1948-04-20 1948-04-20 Improvements in or relating to means for eliminating back lash in transmission mechanisms Expired GB664824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1089748A GB664824A (en) 1948-04-20 1948-04-20 Improvements in or relating to means for eliminating back lash in transmission mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1089748A GB664824A (en) 1948-04-20 1948-04-20 Improvements in or relating to means for eliminating back lash in transmission mechanisms

Publications (1)

Publication Number Publication Date
GB664824A true GB664824A (en) 1952-01-16

Family

ID=9976324

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1089748A Expired GB664824A (en) 1948-04-20 1948-04-20 Improvements in or relating to means for eliminating back lash in transmission mechanisms

Country Status (1)

Country Link
GB (1) GB664824A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112081891A (en) * 2019-06-14 2020-12-15 古德里奇驱动系统有限公司 Actuator lower attachment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112081891A (en) * 2019-06-14 2020-12-15 古德里奇驱动系统有限公司 Actuator lower attachment
CN112081891B (en) * 2019-06-14 2024-05-14 古德里奇驱动系统有限公司 Actuator lower attachment

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