| 摘要 |
PURPOSE:To enhance durability by coupling a main hub and a sub-hub by a compression spring resiliently in the circumferential direction of hub, and thereby providing possibility of giving a large value to the max. torsion angle between two hubs. CONSTITUTION:An inner cogged spline 25 formed at the internal circumference of a main hub 11 meshes with an outer cogged spline 12a formed on an output shaft 12, while an inner cogged spline 31 at the internal circumference of a sub- hub 30 meshes also with said outer cogged spline 12a of the output shaft. The inner cogged spline 25 of main hub 11 has a backlash to the outer cogged spline 12a, while the inner cogged spline 31 of sub-hub 30 is made with a small clearance only to allow slide in the axial direction, and a fitting part is provided between the two hubs so as to admit a compression spring. Now the two hubs 11, 30 are coupled with resilience in the circumferential direction of hubs. Because of adoption of compression spring, a large torsion angle is obtained as well as the spring is free of unreasonable stresses to lead surely to enhancement of durability. |
