| 摘要 |
<p>On the under face of a first fitting plate (4), an annular projection (6) is formed around a central through hole (5), and the outer circumferential wall (61) of the projection (6) is finished to a complete roundness. When a motor (2) is fitted to the first fitting plate (4), the position of a motor shaft (3) is adjusted with reference to the round outer circumferential wall (61). On the other hand, the upper part of the inner circumferential wall of a second fitting plate (10) around the central through hole (5) is formed into an expanded diameter part (71), whose inner circumferential wall is finished to a complete roundness. When the housing (9) of a machine tool is fitted to the second fitting plate (10), the position of a main shaft (1) is adjusted with reference to this round inner circumferential wall. As the projection (6) of the first fitting plate (4) is fitted into the expanded diameter part (71) of the second fitting plate (10), the axial center of the motor shaft (3) and that of the main shaft (1) are aligned to each other.</p> |
