| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve processing accuracy by surely connecting a main spindle and a motor shaft without causing looseness. <P>SOLUTION: A motor shaft claw 27 is inserted into a main spindle groove, and when a main spindle claw 32 is inserted into a groove part, the main spindle 30 and the motor shaft 14 are mutually coaxially connected by inserting a shielding member 40 into clearance 35 defined between the motor shaft claw 27 and the main spindle claw 32. The shielding member 40 has a first member 41 and a second member 42. A tapered surface inclined in the radial direction of the motor shaft is arranged on an abutting surface of the first member 41 and the second member 42 when inserted into the clearance 35. One tapered surface is formed in the shape of gradually thinning for reaching the tip side from the outside end side of the second member, and the other tapered surface is thickly formed to the tip side from the outside end side of the first member 41 in response to the one tapered surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
