| 摘要 |
<p>A drill chuck which has an anti-loosening function includes a chuck body, a nut, three jaws, a bearing, a front sleeve and a rear sleeve. Said rear sleeve fixedly connects with said chuck body. The three jaws are respectively provided in three slant holes in said chuck body, and the threads on said jaws mesh with the threads on said nut. Said bearing lies between said nut and said chuck body. An anti-loosening device is provided between said front sleeve and said nut, which includes an internal gear ring, a control cam and a spring member provided between said internal gear ring and said control cam. Said internal gear ring is fixed on said chuck body. Said control cam is driven by said front sleeve. Said spring member is used to drive said nut to rotate. Said control cam drives said spring member to rotate synchronistically. When the damping increases, siad control cam rotates relative to said spring member so as to have an angle therebetween, so the spring pawl of said spring member abuts against the internal tooth of said internal gear ring to prevent loosening.</p> |
