| 摘要 |
PURPOSE: To facilitate connection of a hollow shaft to a housing by providing a plurality of bores holding a ball each in a joint part of a first coupling part, protruding the ball to the inside of the joint part by means of a concentric ring, and providing a recess part holding a ball in the head part of the second coupling part. CONSTITUTION: A cylindrical tubular connection piece 5 supporting second coupling part 3 in a first coupling part 1 is provided with a plurality of bores 8 on the circumference of a cylindrical bearing face 7. A ball 9 inserted into the bore from the back side so as to be slightly protruded forward is arranged so that it is prevented from coming off. A ring 11, which uses an outside shoulder part 10 as a bearing face and can be moved freely around it, is arranged, and when the ring 11 is in the lower position, the ball 9 is pushed and returned to the inside of the bore 8. In the upper part of a coupling box 14 of a second coupling part 3 fitted in the cylindrical bearing face 7, a plurality of recess parts 13 supporting the ball 9 are arranged. In this way, the ball 9 is prevented from coming off from the recess part by means of the ring 11, and the second coupling part 3 can be fixed in the axial and rotational directions. Insertion of the second coupling part can be facilitated, and freely slidable connection improving force transmission can be carried out. |
