USRE19191E - Gripping device - Google Patents

Gripping device Download PDF

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Publication number
USRE19191E
USRE19191E US70202431A USRE19191E US RE19191 E USRE19191 E US RE19191E US 70202431 A US70202431 A US 70202431A US RE19191 E USRE19191 E US RE19191E
Authority
US
United States
Prior art keywords
elements
gripping
clamps
contour
faces
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
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English (en)
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 filed Critical
Application granted granted Critical
Publication of USRE19191E publication Critical patent/USRE19191E/en
Expired 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
    • B23B31/40—Expansion mandrels
    • 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
    • B23B31/026—Chucks the radial or angular position of the tool being adjustable
    • B23B31/0261—Chucks the radial or angular position of the tool being adjustable for centering the tool
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • 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
    • Y10T279/10—Expanding
    • 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
    • Y10T279/10—Expanding
    • Y10T279/1074—Rotary actuator
    • Y10T279/1079—Clutch or self-actuating type
    • 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
    • Y10T279/17213—Transversely oscillating 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
    • Y10T279/19—Radially reciprocating jaws
    • Y10T279/1986—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
    • Y10T82/00—Turning
    • Y10T82/26—Work driver
    • Y10T82/266—Mandrel
    • Y10T82/268—Expansible

Definitions

  • the invention relates to a gripping device and more specifically to a chuck for gripp the periphery of objects. It may be used with lathes and similar machines. It is adapted to support hollow articles having an inner periphery-or to engage shafts in connection with friction clutches.
  • This invention avoids all these intermediate and auxiliary parts.
  • a plurality of movable clamps only are used which are provided with contacts moving against each other and with friction faces eccentric with respect to the clamps.
  • the clamps may also be provided with centering faces which move against each other.
  • the head with which the clamps are associated serves only as a mounting means.
  • Fig. 1 is a view of a device embodying one form of the invention, the object being operated upon being shown in section;
  • I Fig. 2 is a cross section of the device shown in Fig. 1 taken along the line A-B;
  • Fig. 3 is a view of the device shown in Fig. 1,
  • Fig. 4 is a view in cross section of that type of control means, shown in Fig. 3 and taken along the line C-D;
  • Fig. 5 is a view in cross section, similar to Fig. 2, and wherein the gripping means are in contact with an object of larger inner periphery;
  • Fig. 6 is a view in cross section, similar to Fig. 2, and wherein the gripping means are in contact with an object of smaller inner periphery.
  • A1, A2 and A3 are elements mounted on a head b.
  • This head may be supplied in any customary way with a thread or flange for receiving the spindle head of a lathe or' with a simple bore for the reception or a shaft end.
  • the relative movement of the clamps, with respect to the head may be in any convenient manner. For example, they may be pivoted to the head I) by pivots e.
  • the plurality of 'movable' elements are constructed in general similarly. Each may be pivotally mounted so as to oscillate back and forth. Each has an article-gripping means associated with it which may take the form of a face c of the element, eccentric with the center of oscillation of the element. Each has at least one means associated with it which contacts with a contour d on one of the other elements. As shown in the drawings, this is a point 10. integral with the element and extending outward therefrom. The.
  • the movable elements may each be further provided with a surface It.
  • the movable elements, of which there may be three, are arranged with their faces is toward each other in such a way that each rolls upon the faces 10 of those elements adjacent.
  • a very simple arrangement is where the faces I: are arcs of-circles about the pivots e of their respective elements and where the pivots lie on a circle around a predetermined point about which it is desired to center the work.
  • the faces I: and the contours d may be cylindrical.
  • Means may be provided for the clamps to tend to move in a given direction. These means may be resilient and may be ringshaped springs I, which are fastened on one end -by a pin 9 to the head b and on the other end by a pin h to the pivot c. The clamps are thereby urged to turn in the direction of the arrow 112.
  • each contour d which partakes of the nature of a cam, is so shaped that, as the point 10 of the adjacent clamp moves, the cam d in contact therewith moves its clamp an amount suilicient to keep the gripping face of the latter concentric with the gripping face associateed with the point 10.
  • a simple arrangement of the parts where the gripping faces for one given position of two adjacent clamps are equidistant from the desired center is where the pivots are on a circle about that point and each gripping face is at the same distance from its pivot and also at the same angular displacement from its pivot as measured about said central point. Then it is only necessary, in order to maintain the gripping faces equidistant from the central point, that the clamps have identical angular displacement. In order that they be identical the curve of the contourdmay be the arc of a circle convex with respect to the point 10. If the point 10 happens to be displaced from the center of oscillation, i.
  • the contour may be an arc of a circle whose radius is 2r and the center oi which is at a perpendicular distance 1' times the square root or three from a line between the pivots extended.
  • the geometric construction 01 a device having these particular dimensions is shown in Fig. 2.
  • the clamps are drivingly connected'with each other in such a way that the angular displacements of the clamps is substantially the same in size and direction. This results in the gripping faces 0 always being concentric; thereiore the work is maintained concentric to a predetermined point in or to the middle line of the head or to that of the spindle head of the lathe.
  • the gripping-faces 0 may be pressed outwards by the ring springs I.
  • the work is pushed. on the clamps right up to the head by slightly turning it in the direction against the arrow p2; to assist this the gripping-faces c are slightly tapered towards their front ends. After releasing the work this is kept in an accurate central position in consequence of the turning movement oi. the clamps, which may be eflected by springs. It now the tool cuts into the work and tends to push it in the direction of the arrow '92 in consequence oi the friction the gripping-races are dragged along and pressed outwards. The greater the resistance whichis exerted by the work on the tool,
  • the combination comprising mounting means, a plurality of elements mounted and adapted to rotate thereon, means adapted to rotate with each of said elements and in contact with a contour of another of said elements whereby the movements of said elements are interrelated, and articlegripping means associated with each of said plurality and adapted for gripping an object other than said mounting means and eccentrically positioned with respect to the axis of rotation of the respective elements.
  • the combination comprising mounting means, a plurality of elements pivotally mounted and adapted to rotate thereon, means adapted to rotate with each of said elements and in'contact with a contour of another of said elements whereby the movements of said elements are interrelated, and article-gripping means associated with each of said plurality and adapted for gripping an object other'than said mounting means and eccentrically positioned with respect to the axis of rotation 01 the respective elements.
  • a device 01 the character described, the combination comprising mounting means, a plurality of elements mounted and adapted to rotate thereon, means adapted to rotate with each of said elements and in contact with acontour of another of said elements whereby the movements 01' said elements are interrelated, article-gripping means associated with each 01' said plurality and adapted for gripping an object other than said mounting.
  • article-gripping means associated with each 01' said plurality and adapted for gripping an object other than said mounting.
  • the combination comprising mounting means, a plurality of elements pivotally mounted and adapted to rotate thereon, means adapted to rotate with each of said elements and in contact with a contour of another or said elements whereby the movements of said elements are interrelated, and article-gripping means respectively associated with said elements and eccentrically positioned with respect to the axis 01' rotation of the respective elements, said contour being so shaped and said gripping means being so eccentrically located that said gripping means always determine a said grippin means always determine a circle 01' variable radius about a predetermined point.
  • the 6 combination comprising mounting means, a plurality of elements mounted and adapted to rotate thereon about a center oi rotation, means adapt ed to rotate with each or said elements and in contact with a contour 01 another 01' saidelements whereby the movements 01' said elements are interrelated, and article-gripping means respectively associated with said elements and eccentrically positioned with respect to the axis of rotation of the respective elements, and for a predetermined position concentrically with each other about a predetermined point, each of said contacting means being spaced from its center of rotation a distance equal to the distance between its center of rotation and the center of rotation of the element with which it contacts, and said contour being an arc of a circle having a radius equal to said distance.
  • a device of the character described comprising mounting means, a plurality of elements mounted and adapted to rotate thereon, means adapted to rotate with each of said elements and in contact with a contourof another of said elements whereby the movements of, said elements are interrelated, and article-gripping means respectively associated with said elements and eccentrically positioned with respectto the axis 01' rotation of the respective elements, and for a predetermined position concentrically with each other about a predetermined point, the contour being an arc of a circle.
  • the combination comprising mounting means, a plurality of elements pivotally mounted and adapted to rotate thereon, at least a point of each of said elements being in contact with a cam contour on another of said 9.
  • the combination comprising mounting means, a plurality of elements pivotally mounted and adapted to rotate thereon, at least a point of each one or said elements being in contact, in certain position, with a cam contour on another of said elements, and article-grippingmeans respectively associated with said elements and eccentrically positioned with respect to the axis of rotation of the respective elements and concentrically with each other, at least a point of each 01' said other elements being in certain positions in contact with a cam contour on one of said elements, all of said cams being so shaped that said gripping means are always concentric.
  • a chuck for gripping the inner periphery of hollow articles comprising a chuck body, and three gripping clamps mounted for oscillation in said chuck body and subjected to the influence of springs, said springs tending to move said clamps toward a gripping position, said clamps having cylindrical faces rolling on each other, cylindrical centering faces touching each other 'and article gripping "faces eccentric with each clamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gripping On Spindles (AREA)
  • Jigs For Machine Tools (AREA)
US70202431 1931-05-01 1931-04-30 Gripping device Expired USRE19191E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB149806D DE587969C (de) 1931-05-01 1931-05-01 Mitnehmervorrichtung, insbesondere Innenaufspannvorrichtung fuer zylindrische Hohlkoerper

Publications (1)

Publication Number Publication Date
USRE19191E true USRE19191E (en) 1934-06-05

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ID=25955838

Family Applications (2)

Application Number Title Priority Date Filing Date
US70202431 Expired USRE19191E (en) 1931-05-01 1931-04-30 Gripping device
US608106A Expired - Lifetime US1912251A (en) 1931-05-01 1932-04-28 Gripping device

Family Applications After (1)

Application Number Title Priority Date Filing Date
US608106A Expired - Lifetime US1912251A (en) 1931-05-01 1932-04-28 Gripping device

Country Status (4)

Country Link
US (2) USRE19191E (en(2012))
BE (1) BE389771A (en(2012))
DE (1) DE587969C (en(2012))
FR (1) FR736456A (en(2012))

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761453C (de) * 1939-11-22 1953-03-02 Chicago Pneumatik Tool Company Mittels Druckluft angetriebenes Werkzeug

Also Published As

Publication number Publication date
FR736456A (fr) 1932-11-23
BE389771A (en(2012)) 1932-08-31
US1912251A (en) 1933-05-30
DE587969C (de) 1934-06-04

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