| 摘要 |
A device for drilling through holes comprises a cup-shaped cylindrical housing, on the upper end of which a cone is located which is coupled with a spindle of drilling machine and covers an additional cup-shaped sleeve mounted in a cup-shaped cylindrical housing and a resilient element in the form of a coil spring located between the bottom of cup-shaped cylindrical housing and the bottom of additional cup-shaped sleeve, on the lower end of which a cone is made that is equipped with a chuck with a drill secured therein, besides the additional cup-shaped sleeve is designed as a slide coupled by a key connection with the cup-shaped cylindrical housing, in the upper part of which a cylindrical recess is made, in the bottom of which a threaded hole is located with a rod screwed therein made with possibility of adjustment of its position relative to the bottom of cup-shaped cylindrical housing fixed by a lock nut and in the upper part a multifaceted prism is made for the key, the resilient element is mounted with a gap on a rod, and mutual position of the slide and cup-shaped cylindrical housing is provided by a limiting mechanism in the form of a through groove made in the cup-shaped cylindrical housing, into which a cylindrical pin is inserted with a threaded end connected to the threaded radial hole in the slide. |
