GB842252A - Improvements in and relating to machine tools - Google Patents

Improvements in and relating to machine tools

Info

Publication number
GB842252A
GB842252A GB39895/58A GB3989558A GB842252A GB 842252 A GB842252 A GB 842252A GB 39895/58 A GB39895/58 A GB 39895/58A GB 3989558 A GB3989558 A GB 3989558A GB 842252 A GB842252 A GB 842252A
Authority
GB
United Kingdom
Prior art keywords
arm
wedge
nut
screw
machine
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
GB39895/58A
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.)
KOVOSVIT
Original Assignee
KOVOSVIT
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 KOVOSVIT filed Critical KOVOSVIT
Publication of GB842252A publication Critical patent/GB842252A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

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

Abstract

842,252. Machine-tool details. KOVOSVIT, NARODNI PODNIK. Dec. 10, 1958 [Dec. 11, 1957], No. 39895/58. Class 83 (3). [Also in Group XXIV] In a screw-and-nut feed for a machine-part 1, e.g. the arm of a radial-arm drilling-machine, a non-rotating screw 4 is engaged by a driving-nut 5 and a clearance-limiting nut 10, which is pinned at 11 to a sleeve 9 engaging nut 5 through dogs 7, 8. Axial play between nuts 5, 10 is taken up by wedges 12, 13, the latter resting on the arm 1 and being pivoted about a pin 17 on the arm. Wedge 12 is splined at 20 to arm 1 and engages the underside of nut 10. An adjustable spring 16 presses wedge 13 against wedge 12. to take up backlash on screw 4. Nut 5 is driven by a worm 6 to traverse the arm 1 through a thrust-bearing 2, and during rotation, a cam 15 on sleeve 9 reciprocates a block 14 laterally, this block engaging arms 13<SP>1</SP> on wedge 13 to oscillate the wedge about pivot 17, continuously, relatively to wedge 12, and thus reduce friction between the wedges to allow the spring 16 to act freely as the clearance between the threads varies along the screw 4.
GB39895/58A 1957-12-11 1958-12-10 Improvements in and relating to machine tools Expired GB842252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS842252X 1957-12-11

Publications (1)

Publication Number Publication Date
GB842252A true GB842252A (en) 1960-07-27

Family

ID=5456024

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39895/58A Expired GB842252A (en) 1957-12-11 1958-12-10 Improvements in and relating to machine tools

Country Status (2)

Country Link
FR (1) FR1211178A (en)
GB (1) GB842252A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105196098A (en) * 2015-10-31 2015-12-30 重庆机床(集团)有限责任公司 Gear hobbing machine worktable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105196098A (en) * 2015-10-31 2015-12-30 重庆机床(集团)有限责任公司 Gear hobbing machine worktable

Also Published As

Publication number Publication date
FR1211178A (en) 1960-03-14

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