Polishing head, particularly for slabs of marble, granite, porcelainized gres, and other stone materials

摘要

A polishing head for marble, granite, porcelainized gres, and other stone materials, includes a main shaft (3) which is rotatably mounted on a stationary support (4) and is coupled to an external motor. A casing (2) which is keyed to the lower end of the main shaft (3) and a series of secondary shafts (5) which are arranged within the casing (2) and have external ends provided with abrasive tools (8). The head includes a cam-based movement means (13, 13'; 16, 16') which is connected to the secondary shafts (7) and a transmission means (18, 20) which is interposed between the stationary support (4) and the movement means (13, 13'; 16, 16') and is constituted by at least one worm screw/helical gear coupling (18, 20) wherein the worm screw (18) is fixed to the stationary support (4) and the helical gear is rotatably mounted on the casing (2). The cam-based movement means includes at least one intermediate shaft (14) on which a first cam (13) is keyed. The first cam (13) is suitable to cooperate with a roller which is mounted at the end of a radial arm (17) that is rigidly coupled to one of the secondary shafts (7).