| 摘要 |
<p>The invention concerns a hub device for a pair of saw blades, which includes a first blade, which is arranged to rotate about a rotational axis (r) in a first direction, and a second blade (2), which is ar-ranged to rotate about the same rotational axis (r) in a second direction opposite to said first direction. The hub device includes a first blade adapter, which has a sup-port surface for the first saw blade, and a second blade adapter (25), which has a support surface (26) for the second saw blade (2) and a central fastener for a blade lock (28), which is arranged to secure both blades. The support surface (26) of the second blade adapter (25) has at least three ridges (29) for engagement with corre-sponding notches in the second saw blade (2), the ridges (29) having a height (h) that exceeds a thickness (d) of the second saw blade (2), wherein the blade lock (28) has a circumferential ring surface (30), which is arranged to abut the ridges (29) of the second blade adapter (25), so that the second blade (2) preserves a limited axial mobility against the support surface (26) of the second blade adapter (25).</p> |
