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AssigneePicanol N.V.
InventorsDirk Sampers, Chris Noppe, Emmanuel Delboo, Sven Cafmeyer, Marc Adriaen
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A drive mechanism for driving a heald frame of a weaving machine, the drive mechanism having a crank rotating about a crank axis, a coupling rod, and a swivel lever having a first arm and a second arm, the coupling rod is linked to the first arm of the swivel lever by a second hinged joint adjustable with respect to the first arm of the swivel lever, wherein in at intended locations of the second hinged joint with respect to the first arm of the swivel lever, the second hinged joint is situated on an arc of an imaginary circle when the swivel lever is in a central position between the upper position and the lower position, wherein the imaginary circle has a radius that is equal to the distance between the first hinged joint and the second hinged joint, and the imaginary circle has a center that coincides with the crank axis.
A drive mechanism for driving a heald frame of a weaving machine, the drive mechanism comprising a crank rotating about a crank axis, a coupling rod, and a swivel lever having a first arm and a second arm, wherein the swivel lever is swivelable to-and-fro about a swivel axis between an upper position and a lower position, wherein the coupling rod is linked to the crank by a first hinged joint, which first hinged joint is eccentric to the crank axis, and the coupling rod is linked to the first arm of the swivel lever by a second hinged joint, and wherein a location of the second hinged joint is adjustable with respect to the first arm of the swivel lever, wherein in all intended locations of the second hinged joint with respect to the first arm of the swivel lever, the second hinged joint is situated on an arc of an imaginary circle when the swivel lever is in a central position between the upper position and the lower position, wherein the imaginary circle has a radius (R) that is equal to the distance (L) between the first hinged joint and the second hinged joint, and the imaginary circle has a center that coincides with the crank axis.
A method for adjusting a stroke of a heald frame of a weaving machine, wherein the heald frame is driven by a drive mechanism comprising a crank rotating about a crank axis, a coupling rod, and a swivel lever having a first arm and a second arm, wherein the swivel lever is swivelable to-and-fro about a swivel axis between an upper position and a lower position, and wherein the coupling rod is linked to the crank by a first hinged joint, which first hinged joint is eccentric to the crank axis, and the coupling rod is linked to the first arm of the swivel lever by a second hinged joint, the method comprising adjusting a location of the second hinged joint with respect to the first arm of the swivel lever, wherein the location of the second hinged joint is adjusted in such way that the second hinged joint remains situated on an arc of an imaginary circle when the swivel lever is in a central position between the upper position and the lower position, wherein the imaginary circle has a radius (R) that is equal to the distance (L) between the first hinged joint and the second hinged joint, and the imaginary circle has a center that coincides with the crank axis.
Dependencies are inferred from the claim text.