| 摘要 |
<p>The invention relates to an impact piece for a hammer head of a pile driver device (17) for pile-driving piles (16, 2), the pile-driving head thereof having an asymmetrical cross-section profile with respect to the point symmetry, in particular an open curved profile. According to the invention, the cross section profile can be maintained in a first direction of orientation by a first holding surface. The cross-section profile can be maintained in another direction of orientation by two holding surfaces, said other direction of orientation being rotated about 90° or a multiple of 90° in relation to the first direction of orientation.</p> |
