ELEMENTO DE AMARRE PARA PIEZAS, EN PARTICULAR TORNILLO DE BANCO

Elemento de amarre para piezas, en particular tornillo de banco (10, 33, 40) con una primera mordaza (12, 34, 41) y una segunda mordaza (13, 35, 42) que están apoyadas en una bancada del carro (11), estando las resultantes de las fuerzas de apriete procedentes de las mordazas (12, 13, 34, 35, 41, 42) que actúan sobre las mordazas (12, 13, 34, 35, 41, 42) transmitidas a la bancada del carro (11) situadas en el plano de la fibra neutra (32) de la bancada del carro (11), caracterizado porque la primera mordaza (12, 34, 41) y/o la segunda mordaza (13, 35, 42) se apoyan mediante sendos bulones de articulación (20, 25; 36, 37; 43, 45) en una bancada de carro (11), estando situados en una fibra neutra (32) de la bancada del carro (11) unos orificios (29) para los bulones de articulación (20, 25; 36, 37; 43, 45). This invention relates to a clamping element for workpieces, in particular a vice (10, 33, 40), comprising a first clamping jaw (12, 34, 41) and a second clamping jaw (13, 35, 42), which are mounted on a carriage bed (11). To avoid bending moments as a result of tensile forces acting on the carriage bed (11), the clamping element of the invention is characterized in that the resultants of the forces introduced by the clamping jaws (12, 13, 34, 35, 41, 42) into the carriage bed (11) as a result of the clamping forces acting on the clamping jaws (12, 13, 34, 35, 41, 42) are located in the plane of the neutral fiber (32) of the carriage bed (11). Preferably, the clamping jaws (12, 13, 41, 42) constitute two-armed levers, a clamping surface (21, 24) being associated to the one lever arm and a push rod (27, 46) engaging the other lever arm.