GB495901A - Means for eliminating back-lash in the feed screws of machine tools - Google Patents
Means for eliminating back-lash in the feed screws of machine toolsInfo
- Publication number
- GB495901A GB495901A GB22160/37A GB2216037A GB495901A GB 495901 A GB495901 A GB 495901A GB 22160/37 A GB22160/37 A GB 22160/37A GB 2216037 A GB2216037 A GB 2216037A GB 495901 A GB495901 A GB 495901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nut
- secured
- wheel
- gears
- shaft
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Gear Transmission (AREA)
Abstract
495,901. Screw-and-nut gearing. ARCHDALE & CO., Ltd., J., and WRIGHT, 1. H. Aug. 12, 1937, No. 22160. [Class 80 (iii)] [Also in Group XXII] Means for eliminating backlash in the feed screws of milling machines and other machine tools comprises a feed screw b secured to the work-table a, two nuts c, d within a fixed bearing e, relatively opposed helical gears of slightly different speed ratios for rotating the nuts and a friction clutch between one of the gears and a source of motion which is common to both gears. To the nut c is secured a helical gear-wheel f abutting against a thrust face h at one end of the bearing e and meshing with a gear-wheel k coupled to a shaft j<1> through a lost-motion connection m, n. A helical gear-wheel g secured to the nut d abuts against the other end of the bearing through a ring of thrust balls i and meshes with a gear-wheel coupled to the shaft j through a friction clutch comprising an inner sleeve r secured to the wheel l, an outer member s secured to the shaft and intermediate plates t, u splined to the outer and inner members respectively and pressed together by a spring w. In operation, the shaft j<1> is driven through gearing o, p and as a result of the different speed ratios between the gears f, k and g, l, the nut d rotates faster than the nut c so that the nuts move in against the bearing until the clutch slips and both nuts rotate at the same speed. When the table is being returned, the clutch tends to be relieved of pressure and the nut d is driven by additional gears 3, 4 mounted on the nut and on the member s. In order to allow the table to be moved by hand while the above mechanism is stationary, the screw b is connected to the table through a releasable dog clutch 10, 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22160/37A GB495901A (en) | 1937-08-12 | 1937-08-12 | Means for eliminating back-lash in the feed screws of machine tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22160/37A GB495901A (en) | 1937-08-12 | 1937-08-12 | Means for eliminating back-lash in the feed screws of machine tools |
Publications (1)
Publication Number | Publication Date |
---|---|
GB495901A true GB495901A (en) | 1938-11-22 |
Family
ID=10174910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22160/37A Expired GB495901A (en) | 1937-08-12 | 1937-08-12 | Means for eliminating back-lash in the feed screws of machine tools |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB495901A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750304C (en) * | 1939-01-13 | 1945-01-05 | Backlash compensation device in the feed drive of milling machines | |
US2626126A (en) * | 1950-04-11 | 1953-01-20 | Sasgen Derrick Co | Winch, hoist, and the like |
US2717522A (en) * | 1952-01-07 | 1955-09-13 | Genevoise Instr Physique | Play compensating device for the gear wheels of a kinematic chain |
CN105904272A (en) * | 2016-06-02 | 2016-08-31 | 林志贺 | Radial sliding table compact movement mechanism for multi-spindle numerical control lathe |
-
1937
- 1937-08-12 GB GB22160/37A patent/GB495901A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750304C (en) * | 1939-01-13 | 1945-01-05 | Backlash compensation device in the feed drive of milling machines | |
US2626126A (en) * | 1950-04-11 | 1953-01-20 | Sasgen Derrick Co | Winch, hoist, and the like |
US2717522A (en) * | 1952-01-07 | 1955-09-13 | Genevoise Instr Physique | Play compensating device for the gear wheels of a kinematic chain |
CN105904272A (en) * | 2016-06-02 | 2016-08-31 | 林志贺 | Radial sliding table compact movement mechanism for multi-spindle numerical control lathe |
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