The pulley of the improved pin with support line of multi-line cutting machine for stone

A kind of pulley (1) with improved pin, including：Hub (3), has the outer shroud (11) of rolling bearing (12) in its interior keying；Supporting pin is rotated, it is contained within the inner ring of the bearing (13)；Labyrinth is protected, it is contained between pin and hub, the protection for bearing；Circumferential slot (6), it is in the circumference of the external diameter of pulley (1), and the coating (7) of shaping is contained in circumferential slot (6), for being contacted with diamond wire (8)；The hub of pulley is formed as two parts (9,10), and it is fastened on the internal diameter of pulley (1) in a stable manner；In addition, each outer surface (18) of hub is provided with and is present in the annular labyrinth (17) that the annular labyrinth (16) on each inner surface of removable pin (2) is penetrated each other, and removable pin (2) is made up of two parts (14,15) and axially fastened by releasable connection component (19)；And there is connector between improved pin (2) and the support member (20) of pulley (1), connector is realized by fastening member (26) and guide member (25) are inserted in the thickness of the wall (29,30) of support member in itself along the direction for laying plane parallel to pulley.The structure of the part described herein for being pin (2) and install, advantageous embodiment that improved pin is fixed to support member (20) and pin (2) exterior arrangement, it is chain between the pulley and line in the multi-thread machine of stone to promote to be used for cut.