GB687854A - An improved variable-speed gear box - Google Patents

An improved variable-speed gear box

Info

Publication number
GB687854A
GB687854A GB3216449A GB3216449A GB687854A GB 687854 A GB687854 A GB 687854A GB 3216449 A GB3216449 A GB 3216449A GB 3216449 A GB3216449 A GB 3216449A GB 687854 A GB687854 A GB 687854A
Authority
GB
United Kingdom
Prior art keywords
ratios
wheels
wheel
shaft
countershaft
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
GB3216449A
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.)
CHURCHILL REDMAN Ltd
Original Assignee
CHURCHILL REDMAN Ltd
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 CHURCHILL REDMAN Ltd filed Critical CHURCHILL REDMAN Ltd
Priority to GB3216449A priority Critical patent/GB687854A/en
Publication of GB687854A publication Critical patent/GB687854A/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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
    • F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
    • F16H3/32—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial and an additional shaft
    • 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
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/12—Mechanical drives with means for varying the speed ratio
    • 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
    • B23Q2705/00—Driving working spindles or feeding members carrying tools or work
    • B23Q2705/02—Driving working spindles
    • B23Q2705/06—Mechanical drives with means for varying the speed ratio
    • B23Q2705/062—Mechanical drives with means for varying the speed ratio for lathes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

687,854. Change-speed gear. CHURCHILLREDMAN, Ltd., and DODGSON, F. March 15, 1951 [Dec. 15, 1949], No. 32164/49. Class 80 (ii). Thirty or more ratios are transmitted from an input shaft a to a parallel output shaft c, such as a feed shaft on an automatic lathe, by three countershafts f, h, i (shown out of position), the first, f, of which, itself driven at three ratios by a sliding gear-cluster a', a', a' splined on the input shaft, drives at each of five different ratios, the second and third countershafts h, i, which have different centre - distances, and during drive are geared together and to the final output shaft c by rigidly and slidably keyed wheels h<SP>6</SP>,i<SP>6</SP>, j. The input cluster a', a<SP>2</SP>, a', moved selectively by an individual threeposition rotary dial, drives the first countershaft f through wheels b', b<SP>2</SP>, b' on a sleeve b, free on the output shaft c, and carrying a fast wheel b', meshing, through an idler on the shaft h, with a fast wheel e on the countershaft f. The latter carries a splined cluster f<SP>1</SP>, f<SP>2</SP>, f<SP>3</SP>, selectively movable axially, by an independent rotary dial into ten positions, in five of which it drives the countershaft h at five ratios by meshing wheel f<SP>1</SP> with fast wheels h, or h<SP>1</SP>; f<SP>2</SP> with h<SP>3</SP> or h<SP>4</SP> ; and f<SP>3</SP> with h<SP>5</SP>, whilst in the other five positions it drives the countershaft i at five further ratios by meshing the wheel f<SP>1</SP> with fast wheels i' or i<SP>2</SP>; f<SP>2</SP> with i<SP>3</SP>; and f<SP>3</SP> with i<SP>4</SP> or i'. The numbers of teeth on the adjacent wheels h', h<SP>2</SP>; h<SP>3</SP>, h'; i<SP>1</SP>, i<SP>2</SP> ; and i<SP>4</SP>, i<SP>5</SP> are unequal, their tooth-profiles being suitably modified to enable them to mesh with their single co-operating wheels, e.g. f' &c., on the respective parallel shafts. To prevent locking due to simultaneous meshing of two ratios during a shift of the ten-position gear-cluster f', f<SP>2</SP>, f<SP>3</SP>, its selector dial is locked in gear-positions by a fixed peg from which it must be disengaged by a lifting movement before it can be turned, such movement acting through a lever linkage to slide the splined wheel i<SP>6</SP> out of mesh with h<SP>6</SP>, thereby breaking the connection between the countershafts. The output shaft c may drive a lead-screw shaft j<SP>2</SP> through an axially-engageable wheel pair h free on the input shaft a.
GB3216449A 1949-12-15 1949-12-15 An improved variable-speed gear box Expired GB687854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3216449A GB687854A (en) 1949-12-15 1949-12-15 An improved variable-speed gear box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3216449A GB687854A (en) 1949-12-15 1949-12-15 An improved variable-speed gear box

Publications (1)

Publication Number Publication Date
GB687854A true GB687854A (en) 1953-02-25

Family

ID=10334292

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3216449A Expired GB687854A (en) 1949-12-15 1949-12-15 An improved variable-speed gear box

Country Status (1)

Country Link
GB (1) GB687854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577529A (en) * 1982-08-30 1986-03-25 Romeu Romi Gear transmission assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577529A (en) * 1982-08-30 1986-03-25 Romeu Romi Gear transmission assembly

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