Device for switching over an electropneumatic hammer drill from rotary drilling to hammer drilling and vice versa

摘要

A device for switching over an electropneumatic hammer drill containing a ram from rotary drilling to hammer driller and vice versa is to be made more universal by making it possible, in addition to setting the functional positions of hammer drilling, hammer drill change and normal drilling with a drill, the shank of which is provided with recesses for the engagement of the latching elements, to use a drill with a cylindrical shank for the normal drilling process. This is achieved according to the invention by virtue of the fact that, in its locked position, the ram 13 serves as a stop for drills which are provided with a cylindrical shank and are held by means of a chuck 25 which is mounted in the output-side end region of the spindle sleeve 5, in front of the locking elements 19. <IMAGE>