| 摘要 |
A tool unit (3) for a cutting or sawing machine with a tool carrier (103) enabling especially deep cuts, comprises a first tool (1) and a second part (2, 50). The first tool (1) comprises a disk shaped cutting blade (10) and a first blade driving member (40). The second part (2, 50) comprises either a second blade driving member (50), or a second tool (2) comprising a disk shaped cutting blade (10) and a second blade driving member (50). The first tool (1) is secured to the second part (2, 50) by means of a central clamping unit. Each cutting blade (10), has a central aperture defined by a central edge, and a peripheral cutting edge (13), being the working part of the tool (1, 2). The blade driving members (40, 50) are arranged to rotate together with the disk shaped cutting blade/s (10) about an axis of rotation (A). At least one of the driving members (40, 50) has a circumferential driving surface (41, 51) provided to be able to cooperate with an endless power transmission means. Each blade driving member has a central attachment portion (44,54) comprising at least one aperture (47, 57) for 15 attaching the first driving member (40) to the second driving member (50) by using the central clamping unit. The at least one disk shaped cutting blade (10) has an at least partly recessed portion, adjacent to the central aperture. The at least partly recessed portion is provided for attaching the disk shaped cutting blade (10) to the corresponding blade driving member (40, 50) by holding the recessed portion axially between a main part and a blade supporting part of the corresponding blade driving member, ensuring an essentially flat outer extension plane of each tool (1, 2). |
