| 摘要 |
<p>The invention relates to a bolt driving out device to be attached to a boring machine. According to the invention, the device consists of a gripping device (1) of a boring machine, wherein there is introduced a cylidrical rod (2) provided at the lower side with a thread (a), the lower side of the cylindrical rod (2) having a taper shape and being provided with a recess (a), a recess (c) which accommodates a bearing casing (6) and a recess (d) for the bearing, the bearing casing (6) being provided with a female thread for screwing a retaining ring (8) therein, and a rubber ring (9) is provided for protecting the wall.</p> |
