| 摘要 |
A sprocket of a pull chain comprises a hub, spokes that connect it to the rim arranged as toothed sectors connected to it with roughing bolts and supports installed between the sections. It is arranged as pre-fabricated, of core with hub and hollow teeth, at that the cavities have for instance cylindrical shape symmetrical with respect to radial line of symmetry of profile of tooth and symmetrical with respect to dividing circuit of the sprocket, besides that the teeth have roots, for instance in rectangular form, with that those are installed with tension to slots of same shape placed with axial symmetry at the outer contour of the cell, the teeth are additionally fixed, for instance with pins installed to openings formed with semi-openings provided at joints of the side surfaces of the roots and the slots. |
