Patent ID: 9073161
Filing Date: 2015-07-07
Classification: B23Q,Y10T

Abstract:
1. A dust-collecting device being adaptive to a power drill and comprises: a container having a tapered portion, the tapered portion including an opening, the container having a through hole at bottom, and a positioning seat being raised around the through hole; a shaft assembly passing through the through hole, the shaft assembly having at least one bearing received in the positioning seat; a spring member being mounted around the shaft assembly; and a spacing member being coupled to one end of the spring member, the spacing member having a round hole for a bit of the power drill to pass therethrough and then pass through the shaft assembly and the opening, wherein at least one sleeve is mounted around the shaft assembly, the sleeve containing an elastic pad, and the elastic pad having a plurality of cut-through lines that intersect with each other at a center of the elastic pad, in which each said cut-through line does not run to an edge of the elastic pad, so that the cut-through lines allow the elastic pad to be resiliently biased open at the center thereof and thereby grip the bit, and the shaft assembly has at least one threaded segment for engaging with the sleeve in a screwing manner, whereby, when the power drill drills, drill dust thus generated is guided by a taper of the tapered portion and converged in the container.