Power chuck
AssigneeSMW Schneider & Weisshaupt GmbH
InventorKarl Hiestand
Life of this patent
Estimating the term…
Abstract
In a power chuck including jaws moved by drivers which are displaceable in the axial direction of the chuck body by means of an axially displaceable actuating member mounted in the chuck body, the actuating member is coupled to the individual drivers through two gimbal rings which compensate for unequal displacement of the jaws. The gimbal suspension can be bridged by connecting the rings rigidly to each other. A balanced as well as centric clamping of a workpiece may thus be effected. The manufacturing costs are low so that both economy and high reliability in operation are obtained.
Claims16
A power chuck particularly for turning machines, comprising a chuck body, a plurality of clamping jaws guided in said body for radial displacement outwardly and inwardly, said chuck body having grooves along which said jaws are guided, a plurality of drive members arranged in said body each adjacent one of said jaws and each being displaceable in an axial direction and having an oblique surface engaging a respective jaw so as to move said jaws radially upon axial displacement of said drive members, an actuating member axially movable in said chuck for moving said drive members, and two pivotally mounted gimbal rings connected between all of said drive members and said actuating member for moving said drive members and providing compensation for unequal displacement of said jaws;
- said two gimbal rings being mounted one within the other with the inner one being hinged to the actuating member and to the outer gimbal ring, said outer gimbal ring being positively connected to said drive members.
A power chuck for a turning machine comprising:
- a chuck body having a plurality of radial grooves therein;
- a plurality of jaws each disposed in one of said radial grooves for radial inward and outward motion, each jaw having an oblique surface;
- a plurality of drive members axially movable in said chuck body, each drive member having an oblique surface for engagement with an oblique surface of one of said jaws for radial movement of each respective jaw with axial movement of each respective drive member;
- an actuating member axially movable in said chuck body, said actuating member having an extension with a spherical surface thereon;
- a first gimbal ring having a first spherical surface engaged with said spherical surface of said actuating member extension and pivotally mounted with respect to said extension, said first gimbal ring having a second spherical surface;
- a second gimbal ring having a spherical surface engaged with said spherical surface of said first gimbal ring and pivotally mounted to said first gimbal ring, said second gimbal ring engaged with each other of said drive members for driving said drive members axially with axial movement of said actuating member while permitting relative axial movement among said drive members;
- and
- universal joint connection means connected between said actuating member extension, said first and said second gimbal rings for permitting universal pivotal action of said second gimbal ring with respect to said actuating member.
A power chuck particularly for turning machines, comprising a chuck body, a plurality of clamping jaws guided in said body for radial displacement outwardly and inwardly, said chuck body having grooves along which said jaws are guided, a plurality of drive members arranged in said body each adjacent one of said jaws and each being displaceable in an axial direction and having an oblique surface engaging a respective jaw so as to move said jaws radially upon axial displacement of said drive members, an actuating member axially movable in said chuck for moving said drive members, and two pivotally mounted gimbal rings connected between all of said drive members and said actuating member for moving said drive members and providing compensation for unequal displacement of said jaws, said at least one gimbal ring including an inner gimbal ring and an outer gimbal ring having outwardly facing extension surfaces comprising spherical guide surfaces.
A power chuck comprising, a chuck body having a plurality of radial grooves therein, a plurality of clamping jaws each guided in one of said radial grooves for radial inward and outward displacement, a plurality of drive members arranged in said body for axial displacement, each drive member engaged with one of said clamping jaws for radial displacement of said clamping jaws with axial displacement of said drive members, an actuating member axially movable in said chuck and having an extension which project toward said drive members and disposed radially inwardly of said drive members, an inner gimbal ring pivotally mounted to said actuating member extension by means of two diametrically opposed pins for pivoting of said inner gimbal ring about one radial axis with respect to said actuating member, and an outer gimbal ring hinged to said inner gimbal ring by means of two bolts which are offset by 90.degree. relative to the pins of said inner gimbal ring, said outer gimbal ring being engaged with each of said drive member for moving each drive member axially with axial movement of said actuating member while permitting relative axial movement between drive members by virtue of pivoting of said inner gimbal ring.
Dependencies are inferred from the claim text.