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US2252840A - Double toggle finger holder - Google Patents

Double toggle finger holder Download PDF

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Publication number
US2252840A
US2252840A US311107A US31110739A US2252840A US 2252840 A US2252840 A US 2252840A US 311107 A US311107 A US 311107A US 31110739 A US31110739 A US 31110739A US 2252840 A US2252840 A US 2252840A
Authority
US
United States
Prior art keywords
toggle
finger holder
roller
collet
levers
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 - Lifetime
Application number
US311107A
Other languages
English (en)
Inventor
Alfred E Drissner
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.)
Devlieg Bullard Inc
Original Assignee
National Acme 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 National Acme Co filed Critical National Acme Co
Priority to US311107A priority Critical patent/US2252840A/en
Priority to GB4874/41A priority patent/GB542431A/en
Priority to FR880732D priority patent/FR880732A/fr
Application granted granted Critical
Publication of US2252840A publication Critical patent/US2252840A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B23B31/201—Characterized by features relating primarily to remote control of the gripping means
    • B23B31/207—Characterized by features relating primarily to remote control of the gripping means using mechanical transmission through the spindle
    • B23B31/2073—Axially fixed cam, moving jaws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17411—Spring biased jaws
    • Y10T279/17529—Fixed cam and moving jaws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/34—Accessory or component
    • Y10T279/3425—Sliding cam chuck actuator

Definitions

  • This invention relates to finger holders for spindles and is particularly adapted for use with automatically operative chucks or collets and is a continuation-in-part of the contemporaneously pending application, Serial Number 304,319, filed November '14, 1939, being an improvement upon that shown and described in my contemporaneously pending application Serial Number 257,604, filed February 21. 1939.
  • the object of the invention is the provision of improved finger holder mechanism particularly designed for use with single and multiple spindle automatic 'screw machines and which, like that shown in my said prior application, is capable of exerting great pressure on the chucks or collets to close and maintain themclosed onto the stock during tooling operations with but comparatively slight pressure on and movement of. the fingers but, in addition thereto, is "capable of handling bar stock of greater diametrical variation because of the greater longitudinal movement of the collet.
  • Fig. 1 is a longitudinal sectional view of this improved finger holder illustrating the collet in open position.
  • Fig. 2 is an enlarged sectional view taken on line 22 of Fig. l.
  • Fig. 3 is an enlarged detail view oi the toggle levers for operating the collet
  • Fig. Q is an enlarged detail of the cam for operating the toggle levers.
  • a tubular spindle of a. multiple spindle machine of the bar stock type has been illustrated and when applied to this type of machine, the finger holders are located on the rear end of the tubular spindle 2 carried by the indexible work spindle carrier in the usual manner.
  • the collet tube 3 Within the spindle 2 is located the collet tube 3 and interiorly of the collet tube is the feed or pusher tube 4.
  • the front end of the collet tubet is provided with the usualchuck or collet 5 suitably secured to the collet tube and the feed follet 6 is suitably secured to the front end of the feed tube 4.
  • a sleeve or body member I is suitably secured to-the spindle 2 for rotation therewith and the rear end of this sleeve is provided with a ring 8 secured to the sleeve 1 by pins 9.
  • This ring 8 is provided with cylindrical sockets It for the 2s reception of the enlarged knuckle-formed ends 80 and is provided with suitable bushings It to prevent scoring of the spindle upon the sliding movement of this ring.
  • the ring l5 likewise has cylindrical sockets I'I similar to those of its companion ring 8 for the reception of enlarged knuckle-formed ends it of the other toggle links 19 and these sockets are in line with the sockets 10 of the ring 8. Suitable means is provided to maintain the rings 8 and I! in alignment.
  • the toggle links or levers l2 and I9 each doubleended or of integral U-shape having their overlapping ends pivotally connected by a pin 20' and on this pin is mounted a roller 2
  • Both the toggle links or levers of each toggle are or the same length, each having substantially one-half thereof formed with an enlarged knuckle end thus enabling the use of a double toggle in a small space while increasing the movement of the parts.
  • thrust washers 22 and cup springs 23 are arranged between the nut 14 and the ring it. Between the nut 14 and the ring it are arranged thrust washers 22 and cup springs 23 for cushioning and taking up the thrust of the limited to the details of construction and ar- 88 parts.
  • a sliding sleeve or spool 24 having :an annular recess 25 for the engagement of a suitable shoe (not shown) is adapted to shift a tapered cam member 26 over the roller when the sleeve is shifted longitudinally by means of the usual mechanism on machines of this kind.
  • depresses the roller and spreads the toggle members l2 and I! to effect rearward movement of the ring I5 and collet tube 3 to close the chuck onto the work.
  • sockets receive more than onehalf of the enlarged ends, are all so proportioned and constructed relative one to another that the relatively shiftable members 8 and [5 may very closely approach each other and yet have considerable longitudinal movement to exert great pressure on the chucks or collets with but slight movement of the operating sleeve as hereinbefore described.
  • the rings 8 and i5 are provided with suitable slots 21 in alignment with each other to permit the cam 26 to slide freely therein and maintain the parts in proper position at all times and thus reducing the diameter of this finger holding more compact space.
  • each lever having an enlarged cylindrical end, a pair of relatively .shiftable members having enlarged cylindrical sockets for the reception of the cylindrical ends of the levers, and sliding cam means cooperating with the roller for depressing the roller to spread the toggle, the diameter of the roller, length of the levers and diameters of the cooperating lever ends and'socketsso proportioned and constructed relative one to the other that when the roller is released and the socketed members are relatively shifted toward each other, the distance between the opposing faces of said socketed members will substantially coincide with the diameter of the roller thereby permitting the use of this toggle in a small compact space the cylindrical ends of the levers, and sliding cam means shiftable in the peripheral slots of the relatively shiftable members-thereby reducing the diameter of the finger holder and cooperating with the roller for depressing the roller to spread the toggle, the diameter of the roller, length of the levers and diameters of the cooperating lever ends and sockets so proportioned and constructed relative one' to another that when the roller is released
  • the finger holder of claim 1 in which the relatively shiftable members are ring-shaped and a plurality of sets of double toggles are spaced therearound and in which spring cushioning means is provided for the shiftable ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Turning (AREA)
US311107A 1939-12-27 1939-12-27 Double toggle finger holder Expired - Lifetime US2252840A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US311107A US2252840A (en) 1939-12-27 1939-12-27 Double toggle finger holder
GB4874/41A GB542431A (en) 1939-12-27 1941-04-11 Improvements in hollow spindle chucks
FR880732D FR880732A (fr) 1939-12-27 1941-04-16 Porte-doigts pour mandrins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US311107A US2252840A (en) 1939-12-27 1939-12-27 Double toggle finger holder

Publications (1)

Publication Number Publication Date
US2252840A true US2252840A (en) 1941-08-19

Family

ID=9785444

Family Applications (1)

Application Number Title Priority Date Filing Date
US311107A Expired - Lifetime US2252840A (en) 1939-12-27 1939-12-27 Double toggle finger holder

Country Status (3)

Country Link
US (1) US2252840A (fr)
FR (1) FR880732A (fr)
GB (1) GB542431A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479973A (en) * 1947-02-14 1949-08-23 Norman Company Van Chuck
US2517908A (en) * 1948-11-26 1950-08-08 Cone Automatic Mach Co Inc Work spindle with eccentric work support
US2518813A (en) * 1944-06-24 1950-08-15 Peerco Inc Automatic machine tool
US2773694A (en) * 1952-11-13 1956-12-11 Alfred H Schutte Device for automatic lathes to feed and hold work
US2961247A (en) * 1959-02-24 1960-11-22 Jr Theodore Ziaylek Spindle assembly
US3002258A (en) * 1954-06-18 1961-10-03 New Britain Machine Co Chuck-actuating means
US3002257A (en) * 1954-06-04 1961-10-03 New Britain Machine Co Chuck-actuating mechanism
US3085813A (en) * 1960-04-27 1963-04-16 Sp Mfg Corp Quick change chuck
DE2638433A1 (de) * 1976-08-26 1978-03-02 Loehr & Bromkamp Gmbh Selbsttaetige spannvorrichtung fuer drehmaschinen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1556359A (en) * 1975-06-20 1979-11-21 Wickman Mach Tool Sales Ltd Collect actuating mechanisms

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518813A (en) * 1944-06-24 1950-08-15 Peerco Inc Automatic machine tool
US2479973A (en) * 1947-02-14 1949-08-23 Norman Company Van Chuck
US2517908A (en) * 1948-11-26 1950-08-08 Cone Automatic Mach Co Inc Work spindle with eccentric work support
US2773694A (en) * 1952-11-13 1956-12-11 Alfred H Schutte Device for automatic lathes to feed and hold work
US3002257A (en) * 1954-06-04 1961-10-03 New Britain Machine Co Chuck-actuating mechanism
US3002258A (en) * 1954-06-18 1961-10-03 New Britain Machine Co Chuck-actuating means
US2961247A (en) * 1959-02-24 1960-11-22 Jr Theodore Ziaylek Spindle assembly
US3085813A (en) * 1960-04-27 1963-04-16 Sp Mfg Corp Quick change chuck
DE2638433A1 (de) * 1976-08-26 1978-03-02 Loehr & Bromkamp Gmbh Selbsttaetige spannvorrichtung fuer drehmaschinen

Also Published As

Publication number Publication date
GB542431A (en) 1942-01-08
FR880732A (fr) 1943-04-02

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