Adjustment device for machines for cutting floor tiles and similar

An adjustment device for machines for cutting floor tiles and similar, applicable to electrical cutting machines provided with a base (1) on which the floor tiles to be cut move in a longitudinal direction and an arm (2) carrying a head with a cutting disc (5) driven by an electric motor;

• said centering device comprising:
• an adjustment bolt (3) having:
• a cylindrical lower section (31) rotatably mounted in a hole (11) in the base with respect to a first axis (z) perpendicular to the base;
• a cam (33) defined in an intermediate area of the adjustment bolt (3) and which acts against the inner contour of a hole (21) defined in the arm (2), the rotation of the cam (33) causing the arm to move around the said first axis (z) for centering the cutting disc (5) with the base (1) and, a threaded upper section (34), aligned with the cylindrical lower section (31) and protruding at the top from the arm (2) for mounting a fastening nut (36) for fastening the arm (2) to the adjustment bolt (3) in different relative positions;
• wherein:
• the hole (21) in the arm containing the cam (33) has a square section and,
• the cam (33) has a symmetrical profile, inscribed in the square section of the square hole (21) in the arm, formed by two curved sectors (3a, 3b) of different curvature and with the axis thereof displaced toward the vertex of the curved sector (3b) of greater curvature;
• said cam (33) having a length, in the direction of the axis of symmetry (3c) thereof, and a width, in a direction perpendicular to the axis of symmetry (3c) thereof, of a dimension equal to the length of the side of the aforementioned square hole (21);
• such that the rotation of the adjustment bolt (3) causes the arm to move along a square path (T) and the cutting disc (5) to be adjusted in two directions (x, y), parallel and perpendicular to the longitudinal direction (x) of the base.