US 4,223,849 AGranted

Chucking spindle for the reception of a bobbin carrier

AssigneeBarmag Barmer Maschinenfabrik AG

InventorsHeinz Schippers, Erich Lenk

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Abstract

An improved clamping chuck for use in a thread winding device wherein a bobbin carrier is removably mounted and held on an expandable chucking spindle by means of swingable, elongated clamping elements which are distributed about the outer circumferential mantle of the chucking spindle and move radially outwardly and inwardly of the mantle surface through openings defining each clamping position. The improvement comprises a combination of these special clamping elements with means to apply two torque-producing forces causing each clamping element to swing into its clamping position outwardly of the mantle, preferably under a spring tensioned force, and another force transmitting means to counteract the torque-producing forces to return the clamping elements into their retracted or release position below the mantle surface in order to change bobbin carriers. In the preferred embodiment, the counteracting force transmitting means is a compressed air operated annular piston ring which is slidably mounted about the chuck in an annular interspace between the spindle and a mantle sleeve so as to engage the clamping elements which are mounted in common cages formed in the annular interspace, using a self-contained arrangement within the spindle for delivering the compressed air to the cylinder operating the piston ring.

In a clamping chuck on a thread-winding machine for the reception of a removable bobbin carrier wherein said chuck includes a chucking spindle turnably borne on an arm extending from the machine frame, a cylindrical mantle sleeve mounted concentrically about said spindle and having an inner diameter greater than an outer diameter of said spindle over a substantial portion of the total length of the chuck so as to define at least one annular cylindrical interspace between said sleeve and said spindle at a selected axial position along the chuck, and a plurality of clamping elements situated within said interspace and radially supported by the spindle with openings in said mantle sleeve for the radial passage therethrough of each clamping element, the improvement which comprises:

elongated clamping elements arranged in said interspace between said spindle and said mantle sleeve to swing freely in an axial plane of the chuck, each clamping element having an outer clamping end which is movable radially of its sleeve opening between an extended position for gripping the bobbin carrier and a retracted position for releasing the bobbin carrier, an inner thrust end free to slide while supported by the spindle and a force directing slide cam edge between said outer clamping end and said inner thrust end, said cam edge being in sliding contact along an opposing slide surface within the sleeve and spindle combination so as to provide a radially directed component of force;
means to exert two forces on each clamping element to cause a swinging movement into its extended clamping position, one force being applied in the area of said thrust end and the other force being applied in the area of the slide cam edge, each of said two forces being directed axially parallel of the chuck and opposite to one another and at a radially spaced distance from one another so that the two forces on the clamping element combine to exert a torque acting in the axial plane so as to swing the clamping element into its radially extended clamping position;
and
means to counteract said two forces to return each of said clamping elements to its retracted position.

1 more element

Facts

Application

06/061,747Filed 30 Jul 1979 · continuation in part

Priority

DE 27198534 May 1977

Granted

23 Sep 1980

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

B65H 54/543
Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members: securing cores or holders to…
B65H 2701/31
Handled filamentary material: textiles threads or artificial strands of filaments
B65H
Handling thin or filamentary material

Abstract

Claims22