| 摘要 |
<p>A fast applicable protection for electric tools particularly for grinding machines is anticipated, which is located on the cover (1) of the primary gearing of the grinding machine. Opposite the chassis (1) there is an approximately disk-shaped guide (5), which is terminated by a ring-shaped adapter (7) and located centrally to the axis of the driving spindle (2). Between the guide (6) and the cover (1) there is a partly rotating equally disk-shaped fastening ring (9) with adapter (11) opposite the adapter (7). The guide (5) and the fastening disk (9), which firmly hold the shield (15), are touching via a guiding surface (8) on the guide (5) and the internal guiding surface (12), next to the fastening disk (9), which are part of a spherical surface with equal bending radii and their centre on the spindle (2) axis. On the adapter (11) there is an arc-shaped groove (20), through with the blocking screw is reaching. The blocking screw features a nut (25), which is form-fittedly connected to the adapter (7), while between the adapter (11) and cover (1) it has a head (27), which has a form-fitted handle (29). By turning the handle (29) and thus the blocking screw (2) anticlockwise (arrow 35), the fastening disk (9) is fastened between the guide (5) and the cover (1), while by turning the handle (29) in the opposite direction the fastening disk (9) is released so that the shield (15) is manually turned into the required position.</p> |
